Fixed #2988

Associated with #2982

dist/preview release/gui/babylon.gui.js

@@ -22,7 +22,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var AdvancedDynamicTexture = (function (_super) {
+        var AdvancedDynamicTexture = /** @class */ (function (_super) {
             __extends(AdvancedDynamicTexture, _super);
             function AdvancedDynamicTexture(name, width, height, scene, generateMipMaps, samplingMode) {
                 if (width === void 0) { width = 0; }
@@ -430,7 +430,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Measure = (function () {
+        var Measure = /** @class */ (function () {
             function Measure(left, top, width, height) {
                 this.left = left;
                 this.top = top;
@@ -475,7 +475,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Vector2WithInfo = (function (_super) {
+        var Vector2WithInfo = /** @class */ (function (_super) {
             __extends(Vector2WithInfo, _super);
             function Vector2WithInfo(source, buttonIndex) {
                 if (buttonIndex === void 0) { buttonIndex = 0; }
@@ -486,7 +486,7 @@ var BABYLON;
             return Vector2WithInfo;
         }(BABYLON.Vector2));
         GUI.Vector2WithInfo = Vector2WithInfo;
-        var Matrix2D = (function () {
+        var Matrix2D = /** @class */ (function () {
             function Matrix2D(m00, m01, m10, m11, m20, m21) {
                 this.m = new Float32Array(6);
                 this.fromValues(m00, m01, m10, m11, m20, m21);
@@ -607,7 +607,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var ValueAndUnit = (function () {
+        var ValueAndUnit = /** @class */ (function () {
             function ValueAndUnit(value, unit, negativeValueAllowed) {
                 if (unit === void 0) { unit = ValueAndUnit.UNITMODE_PIXEL; }
                 if (negativeValueAllowed === void 0) { negativeValueAllowed = true; }
@@ -725,7 +725,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Control = (function () {
+        var Control = /** @class */ (function () {
             // Functions
             function Control(name) {
                 this.name = name;
@@ -1771,7 +1771,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Container = (function (_super) {
+        var Container = /** @class */ (function (_super) {
             __extends(Container, _super);
             function Container(name) {
                 var _this = _super.call(this, name) || this;
@@ -1950,7 +1950,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var StackPanel = (function (_super) {
+        var StackPanel = /** @class */ (function (_super) {
             __extends(StackPanel, _super);
             function StackPanel(name) {
                 var _this = _super.call(this, name) || this;
@@ -2092,7 +2092,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Rectangle = (function (_super) {
+        var Rectangle = /** @class */ (function (_super) {
             __extends(Rectangle, _super);
             function Rectangle(name) {
                 var _this = _super.call(this, name) || this;
@@ -2208,7 +2208,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Ellipse = (function (_super) {
+        var Ellipse = /** @class */ (function (_super) {
             __extends(Ellipse, _super);
             function Ellipse(name) {
                 var _this = _super.call(this, name) || this;
@@ -2274,7 +2274,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Line = (function (_super) {
+        var Line = /** @class */ (function (_super) {
             __extends(Line, _super);
             function Line(name) {
                 var _this = _super.call(this, name) || this;
@@ -2474,7 +2474,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Slider = (function (_super) {
+        var Slider = /** @class */ (function (_super) {
             __extends(Slider, _super);
             function Slider(name) {
                 var _this = _super.call(this, name) || this;
@@ -2684,7 +2684,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Checkbox = (function (_super) {
+        var Checkbox = /** @class */ (function (_super) {
             __extends(Checkbox, _super);
             function Checkbox(name) {
                 var _this = _super.call(this, name) || this;
@@ -2800,7 +2800,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var RadioButton = (function (_super) {
+        var RadioButton = /** @class */ (function (_super) {
             __extends(RadioButton, _super);
             function RadioButton(name) {
                 var _this = _super.call(this, name) || this;
@@ -2937,7 +2937,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var TextBlock = (function (_super) {
+        var TextBlock = /** @class */ (function (_super) {
             __extends(TextBlock, _super);
             function TextBlock(name, text) {
                 if (text === void 0) { text = ""; }
@@ -3146,7 +3146,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Image = (function (_super) {
+        var Image = /** @class */ (function (_super) {
             __extends(Image, _super);
             function Image(name, url) {
                 var _this = _super.call(this, name) || this;
@@ -3388,7 +3388,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var Button = (function (_super) {
+        var Button = /** @class */ (function (_super) {
             __extends(Button, _super);
             function Button(name) {
                 var _this = _super.call(this, name) || this;
@@ -3517,7 +3517,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var ColorPicker = (function (_super) {
+        var ColorPicker = /** @class */ (function (_super) {
             __extends(ColorPicker, _super);
             function ColorPicker(name) {
                 var _this = _super.call(this, name) || this;
@@ -3863,7 +3863,7 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var InputText = (function (_super) {
+        var InputText = /** @class */ (function (_super) {
             __extends(InputText, _super);
             function InputText(name, text) {
                 if (text === void 0) { text = ""; }
@@ -4112,12 +4112,12 @@ var BABYLON;
                         return;
                 }
                 // Printable characters
-                if ((keyCode === -1) ||
-                    (keyCode === 32) ||
-                    (keyCode > 47 && keyCode < 58) ||
-                    (keyCode > 64 && keyCode < 91) ||
-                    (keyCode > 185 && keyCode < 193) ||
-                    (keyCode > 218 && keyCode < 223) ||
+                if ((keyCode === -1) || // Direct access
+                    (keyCode === 32) || // Space
+                    (keyCode > 47 && keyCode < 58) || // Numbers
+                    (keyCode > 64 && keyCode < 91) || // Letters
+                    (keyCode > 185 && keyCode < 193) || // Special characters
+                    (keyCode > 218 && keyCode < 223) || // Special characters
                     (keyCode > 95 && keyCode < 112)) {
                     if (this._cursorOffset === 0) {
                         this.text += key;
@@ -4276,13 +4276,13 @@ var BABYLON;
 (function (BABYLON) {
     var GUI;
     (function (GUI) {
-        var KeyPropertySet = (function () {
+        var KeyPropertySet = /** @class */ (function () {
             function KeyPropertySet() {
             }
             return KeyPropertySet;
         }());
         GUI.KeyPropertySet = KeyPropertySet;
-        var VirtualKeyboard = (function (_super) {
+        var VirtualKeyboard = /** @class */ (function (_super) {
             __extends(VirtualKeyboard, _super);
             function VirtualKeyboard() {
                 var _this = _super !== null && _super.apply(this, arguments) || this;

dist/preview release/inspector/babylon.inspector.js

@@ -1,6 +1,6 @@
 var INSPECTOR;
 (function (INSPECTOR) {
-    var Inspector = (function () {
+    var Inspector = /** @class */ (function () {
         /** The inspector is created with the given engine.
          * If the parameter 'popup' is false, the inspector is created as a right panel on the main window.
          * If the parameter 'popup' is true, the inspector is created in another popup.
@@ -783,7 +783,7 @@ var INSPECTOR;
      * Represents a html div element.
      * The div is built when an instance of BasicElement is created.
      */
-    var BasicElement = (function () {
+    var BasicElement = /** @class */ (function () {
         function BasicElement() {
             this._div = INSPECTOR.Helpers.CreateDiv();
         }
@@ -810,7 +810,7 @@ var INSPECTOR;
 
 var INSPECTOR;
 (function (INSPECTOR) {
-    var Adapter = (function () {
+    var Adapter = /** @class */ (function () {
         function Adapter(obj) {
             this._obj = obj;
         }
@@ -865,7 +865,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var CameraAdapter = (function (_super) {
+    var CameraAdapter = /** @class */ (function (_super) {
         __extends(CameraAdapter, _super);
         function CameraAdapter(obj) {
             return _super.call(this, obj) || this;
@@ -914,7 +914,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var PhysicsImpostorAdapter = (function (_super) {
+    var PhysicsImpostorAdapter = /** @class */ (function (_super) {
         __extends(PhysicsImpostorAdapter, _super);
         function PhysicsImpostorAdapter(obj, viewer) {
             var _this = _super.call(this, obj) || this;
@@ -975,7 +975,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var GUIAdapter = (function (_super) {
+    var GUIAdapter = /** @class */ (function (_super) {
         __extends(GUIAdapter, _super);
         function GUIAdapter(obj) {
             return _super.call(this, obj) || this;
@@ -1026,7 +1026,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var SoundAdapter = (function (_super) {
+    var SoundAdapter = /** @class */ (function (_super) {
         __extends(SoundAdapter, _super);
         function SoundAdapter(obj) {
             return _super.call(this, obj) || this;
@@ -1082,7 +1082,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var TextureAdapter = (function (_super) {
+    var TextureAdapter = /** @class */ (function (_super) {
         __extends(TextureAdapter, _super);
         function TextureAdapter(obj) {
             return _super.call(this, obj) || this;
@@ -1128,7 +1128,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var LightAdapter = (function (_super) {
+    var LightAdapter = /** @class */ (function (_super) {
         __extends(LightAdapter, _super);
         function LightAdapter(obj) {
             return _super.call(this, obj) || this;
@@ -1179,7 +1179,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var MaterialAdapter = (function (_super) {
+    var MaterialAdapter = /** @class */ (function (_super) {
         __extends(MaterialAdapter, _super);
         function MaterialAdapter(obj) {
             return _super.call(this, obj) || this;
@@ -1223,7 +1223,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var MeshAdapter = (function (_super) {
+    var MeshAdapter = /** @class */ (function (_super) {
         __extends(MeshAdapter, _super);
         function MeshAdapter(obj) {
             return _super.call(this, obj) || this;
@@ -1313,7 +1313,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var DetailPanel = (function (_super) {
+    var DetailPanel = /** @class */ (function (_super) {
         __extends(DetailPanel, _super);
         function DetailPanel(dr) {
             var _this = _super.call(this) || this;
@@ -1461,7 +1461,7 @@ var INSPECTOR;
     /**
      * A property is a link between a data (string) and an object.
      */
-    var Property = (function () {
+    var Property = /** @class */ (function () {
         function Property(prop, obj) {
             this._property = prop;
             this._obj = obj;
@@ -1509,7 +1509,7 @@ var INSPECTOR;
 
 var INSPECTOR;
 (function (INSPECTOR) {
-    var PropertyFormatter = (function () {
+    var PropertyFormatter = /** @class */ (function () {
         function PropertyFormatter() {
         }
         /**
@@ -1536,7 +1536,7 @@ var INSPECTOR;
      * If this instance has no link to other instances, its type is ALWAYS a simple one (see above).
      *
      */
-    var PropertyLine = (function () {
+    var PropertyLine = /** @class */ (function () {
         function PropertyLine(prop, parent, level) {
             if (level === void 0) { level = 0; }
             // If the type is complex, this property will have child to update
@@ -1975,7 +1975,7 @@ var INSPECTOR;
     /**
     * Display a very small div corresponding to the given color
     */
-    var ColorElement = (function (_super) {
+    var ColorElement = /** @class */ (function (_super) {
         __extends(ColorElement, _super);
         // The color as hexadecimal string
         function ColorElement(color) {
@@ -2025,7 +2025,7 @@ var INSPECTOR;
      * Represents a html div element.
      * The div is built when an instance of BasicElement is created.
      */
-    var ColorPickerElement = (function (_super) {
+    var ColorPickerElement = /** @class */ (function (_super) {
         __extends(ColorPickerElement, _super);
         function ColorPickerElement(color, propertyLine) {
             var _this = _super.call(this) || this;
@@ -2095,7 +2095,7 @@ var INSPECTOR;
     * Display a very small div. A new canvas is created, with a new Babylon.js scene, containing only the
     * cube texture in a cube
     */
-    var CubeTextureElement = (function (_super) {
+    var CubeTextureElement = /** @class */ (function (_super) {
         __extends(CubeTextureElement, _super);
         /** The texture given as a parameter should be cube. */
         function CubeTextureElement(tex) {
@@ -2210,7 +2210,7 @@ var INSPECTOR;
     * Display a very small div. A new canvas is created, with a new Babylon.js scene, containing only the
     * cube texture in a cube
     */
-    var HDRCubeTextureElement = (function (_super) {
+    var HDRCubeTextureElement = /** @class */ (function (_super) {
         __extends(HDRCubeTextureElement, _super);
         /** The texture given as a parameter should be cube. */
         function HDRCubeTextureElement(tex) {
@@ -2254,7 +2254,7 @@ var INSPECTOR;
      * A search bar can be used to filter elements in the tree panel.
      * At each keypress on the input, the treepanel will be filtered.
      */
-    var SearchBar = (function (_super) {
+    var SearchBar = /** @class */ (function (_super) {
         __extends(SearchBar, _super);
         function SearchBar(tab) {
             var _this = _super.call(this) || this;
@@ -2300,7 +2300,7 @@ var INSPECTOR;
     /**
     * Display a very small div corresponding to the given texture. On mouse over, display the full image
     */
-    var TextureElement = (function (_super) {
+    var TextureElement = /** @class */ (function (_super) {
         __extends(TextureElement, _super);
         function TextureElement(tex) {
             var _this = _super.call(this) || this;
@@ -2336,7 +2336,7 @@ var INSPECTOR;
     /**
      * Creates a tooltip for the parent of the given html element
      */
-    var Tooltip = (function () {
+    var Tooltip = /** @class */ (function () {
         function Tooltip(elem, tip, attachTo) {
             var _this = this;
             this._elem = elem;
@@ -2357,7 +2357,7 @@ var INSPECTOR;
 
 var INSPECTOR;
 (function (INSPECTOR) {
-    var Helpers = (function () {
+    var Helpers = /** @class */ (function () {
         function Helpers() {
         }
         /**
@@ -2544,7 +2544,7 @@ var INSPECTOR;
 
 var INSPECTOR;
 (function (INSPECTOR) {
-    var Scheduler = (function () {
+    var Scheduler = /** @class */ (function () {
         function Scheduler() {
             /** Is this scheduler in pause ? */
             this.pause = false;
@@ -2597,7 +2597,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var Tab = (function (_super) {
+    var Tab = /** @class */ (function (_super) {
         __extends(Tab, _super);
         function Tab(tabbar, name) {
             var _this = _super.call(this) || this;
@@ -2676,7 +2676,7 @@ var INSPECTOR;
      * in which properties will be displayed.
      * Both panels are separated by a resize bar
      */
-    var PropertyTab = (function (_super) {
+    var PropertyTab = /** @class */ (function (_super) {
         __extends(PropertyTab, _super);
         function PropertyTab(tabbar, name, insp) {
             var _this = _super.call(this, tabbar, name) || this;
@@ -2820,7 +2820,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var CameraTab = (function (_super) {
+    var CameraTab = /** @class */ (function (_super) {
         __extends(CameraTab, _super);
         function CameraTab(tabbar, inspector) {
             return _super.call(this, tabbar, 'Camera', inspector) || this;
@@ -2853,7 +2853,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var GUITab = (function (_super) {
+    var GUITab = /** @class */ (function (_super) {
         __extends(GUITab, _super);
         function GUITab(tabbar, inspector) {
             return _super.call(this, tabbar, 'GUI', inspector) || this;
@@ -2908,7 +2908,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var PhysicsTab = (function (_super) {
+    var PhysicsTab = /** @class */ (function (_super) {
         __extends(PhysicsTab, _super);
         function PhysicsTab(tabbar, inspector) {
             return _super.call(this, tabbar, 'Physics', inspector) || this;
@@ -2948,7 +2948,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var SoundTab = (function (_super) {
+    var SoundTab = /** @class */ (function (_super) {
         __extends(SoundTab, _super);
         function SoundTab(tabbar, inspector) {
             return _super.call(this, tabbar, 'Audio', inspector) || this;
@@ -2985,7 +2985,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var TextureTab = (function (_super) {
+    var TextureTab = /** @class */ (function (_super) {
         __extends(TextureTab, _super);
         function TextureTab(tabbar, inspector) {
             var _this = _super.call(this, tabbar, 'Textures') || this;
@@ -3160,7 +3160,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var LightTab = (function (_super) {
+    var LightTab = /** @class */ (function (_super) {
         __extends(LightTab, _super);
         function LightTab(tabbar, inspector) {
             return _super.call(this, tabbar, 'Light', inspector) || this;
@@ -3193,7 +3193,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var MaterialTab = (function (_super) {
+    var MaterialTab = /** @class */ (function (_super) {
         __extends(MaterialTab, _super);
         function MaterialTab(tabbar, inspector) {
             return _super.call(this, tabbar, 'Material', inspector) || this;
@@ -3227,7 +3227,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var MeshTab = (function (_super) {
+    var MeshTab = /** @class */ (function (_super) {
         __extends(MeshTab, _super);
         function MeshTab(tabbar, inspector) {
             return _super.call(this, tabbar, 'Mesh', inspector) || this;
@@ -3299,7 +3299,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var SceneTab = (function (_super) {
+    var SceneTab = /** @class */ (function (_super) {
         __extends(SceneTab, _super);
         function SceneTab(tabbar, insp) {
             var _this = _super.call(this, tabbar, 'Scene') || this;
@@ -3486,7 +3486,7 @@ var INSPECTOR;
      * - hook all console.log call and display them in this panel (and in the browser console as well)
      * - display all Babylon logs (called with Tools.Log...)
      */
-    var ConsoleTab = (function (_super) {
+    var ConsoleTab = /** @class */ (function (_super) {
         __extends(ConsoleTab, _super);
         function ConsoleTab(tabbar, insp) {
             var _this = _super.call(this, tabbar, 'Console') || this;
@@ -3620,7 +3620,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var StatsTab = (function (_super) {
+    var StatsTab = /** @class */ (function (_super) {
         __extends(StatsTab, _super);
         function StatsTab(tabbar, insp) {
             var _this = _super.call(this, tabbar, 'Stats') || this;
@@ -3909,7 +3909,7 @@ var INSPECTOR;
      * A tab bar will contains each view the inspector can have : Canvas2D, Meshes...
      * The default active tab is the first one of the list.
      */
-    var TabBar = (function (_super) {
+    var TabBar = /** @class */ (function (_super) {
         __extends(TabBar, _super);
         function TabBar(inspector, initialTab) {
             var _this = _super.call(this) || this;
@@ -4103,7 +4103,7 @@ var INSPECTOR;
 
 var INSPECTOR;
 (function (INSPECTOR) {
-    var AbstractTool = (function () {
+    var AbstractTool = /** @class */ (function () {
         function AbstractTool(icon, parent, inspector, tooltip) {
             var _this = this;
             this._inspector = inspector;
@@ -4150,7 +4150,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var PauseScheduleTool = (function (_super) {
+    var PauseScheduleTool = /** @class */ (function (_super) {
         __extends(PauseScheduleTool, _super);
         function PauseScheduleTool(parent, inspector) {
             var _this = _super.call(this, 'fa-pause', parent, inspector, 'Pause the automatic update of properties') || this;
@@ -4186,7 +4186,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var PickTool = (function (_super) {
+    var PickTool = /** @class */ (function (_super) {
         __extends(PickTool, _super);
         function PickTool(parent, inspector) {
             var _this = _super.call(this, 'fa-mouse-pointer', parent, inspector, 'Select a mesh in the scene') || this;
@@ -4247,7 +4247,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var PopupTool = (function (_super) {
+    var PopupTool = /** @class */ (function (_super) {
         __extends(PopupTool, _super);
         function PopupTool(parent, inspector) {
             return _super.call(this, 'fa-external-link', parent, inspector, 'Open the inspector in a popup') || this;
@@ -4273,7 +4273,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var RefreshTool = (function (_super) {
+    var RefreshTool = /** @class */ (function (_super) {
         __extends(RefreshTool, _super);
         function RefreshTool(parent, inspector) {
             return _super.call(this, 'fa-refresh', parent, inspector, 'Refresh the current tab') || this;
@@ -4299,7 +4299,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var LabelTool = (function (_super) {
+    var LabelTool = /** @class */ (function (_super) {
         __extends(LabelTool, _super);
         function LabelTool(parent, inspector) {
             var _this = _super.call(this, 'fa-tags', parent, inspector, 'Display mesh names on the canvas') || this;
@@ -4416,7 +4416,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var Toolbar = (function (_super) {
+    var Toolbar = /** @class */ (function (_super) {
         __extends(Toolbar, _super);
         function Toolbar(inspector) {
             var _this = _super.call(this) || this;
@@ -4482,7 +4482,7 @@ var INSPECTOR;
     /**
      * Removes the inspector panel
      */
-    var DisposeTool = (function (_super) {
+    var DisposeTool = /** @class */ (function (_super) {
         __extends(DisposeTool, _super);
         function DisposeTool(parent, inspector) {
             return _super.call(this, 'fa-times', parent, inspector, 'Close the inspector panel') || this;
@@ -4508,7 +4508,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var TreeItem = (function (_super) {
+    var TreeItem = /** @class */ (function (_super) {
         __extends(TreeItem, _super);
         function TreeItem(tab, obj) {
             var _this = _super.call(this) || this;
@@ -4665,7 +4665,7 @@ var INSPECTOR;
 
 var INSPECTOR;
 (function (INSPECTOR) {
-    var AbstractTreeTool = (function () {
+    var AbstractTreeTool = /** @class */ (function () {
         function AbstractTreeTool() {
             /** Is the tool enabled ? */
             this._on = false;
@@ -4710,7 +4710,7 @@ var INSPECTOR;
     /**
      * Checkbox to display/hide the primitive
      */
-    var BoundingBox = (function (_super) {
+    var BoundingBox = /** @class */ (function (_super) {
         __extends(BoundingBox, _super);
         function BoundingBox(obj) {
             var _this = _super.call(this) || this;
@@ -4757,7 +4757,7 @@ var INSPECTOR;
     /**
      *
      */
-    var CameraPOV = (function (_super) {
+    var CameraPOV = /** @class */ (function (_super) {
         __extends(CameraPOV, _super);
         function CameraPOV(camera) {
             var _this = _super.call(this) || this;
@@ -4801,7 +4801,7 @@ var INSPECTOR;
     /**
      *
      */
-    var SoundInteractions = (function (_super) {
+    var SoundInteractions = /** @class */ (function (_super) {
         __extends(SoundInteractions, _super);
         function SoundInteractions(playSound) {
             var _this = _super.call(this) || this;
@@ -4849,7 +4849,7 @@ var INSPECTOR;
     /**
      * Checkbox to display/hide the primitive
      */
-    var Checkbox = (function (_super) {
+    var Checkbox = /** @class */ (function (_super) {
         __extends(Checkbox, _super);
         function Checkbox(obj) {
             var _this = _super.call(this) || this;
@@ -4899,7 +4899,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var INSPECTOR;
 (function (INSPECTOR) {
-    var DebugArea = (function (_super) {
+    var DebugArea = /** @class */ (function (_super) {
         __extends(DebugArea, _super);
         function DebugArea(obj) {
             var _this = _super.call(this) || this;
@@ -4939,7 +4939,7 @@ var INSPECTOR;
     /**
      * Checkbox to display/hide the primitive
      */
-    var Info = (function (_super) {
+    var Info = /** @class */ (function (_super) {
         __extends(Info, _super);
         function Info(obj) {
             var _this = _super.call(this) || this;

dist/preview release/loaders/babylon.glTF1FileLoader.js

@@ -11,7 +11,7 @@ var BABYLON;
         // Sets the useRightHandedSystem flag on the scene.
         GLTFLoaderCoordinateSystemMode[GLTFLoaderCoordinateSystemMode["FORCE_RIGHT_HANDED"] = 2] = "FORCE_RIGHT_HANDED";
     })(GLTFLoaderCoordinateSystemMode = BABYLON.GLTFLoaderCoordinateSystemMode || (BABYLON.GLTFLoaderCoordinateSystemMode = {}));
-    var GLTFFileLoader = (function () {
+    var GLTFFileLoader = /** @class */ (function () {
         function GLTFFileLoader() {
             // V2 options
             this.coordinateSystemMode = GLTFLoaderCoordinateSystemMode.AUTO;
@@ -218,7 +218,7 @@ var BABYLON;
         return GLTFFileLoader;
     }());
     BABYLON.GLTFFileLoader = GLTFFileLoader;
-    var BinaryReader = (function () {
+    var BinaryReader = /** @class */ (function () {
         function BinaryReader(arrayBuffer) {
             this._arrayBuffer = arrayBuffer;
             this._dataView = new DataView(arrayBuffer);
@@ -364,7 +364,7 @@ var BABYLON;
             ETokenType[ETokenType["UNKNOWN"] = 2] = "UNKNOWN";
             ETokenType[ETokenType["END_OF_INPUT"] = 3] = "END_OF_INPUT";
         })(ETokenType || (ETokenType = {}));
-        var Tokenizer = (function () {
+        var Tokenizer = /** @class */ (function () {
             function Tokenizer(toParse) {
                 this._pos = 0;
                 this.isLetterOrDigitPattern = /^[a-zA-Z0-9]+$/;
@@ -1292,7 +1292,7 @@ var BABYLON;
         /**
         * Implementation of the base glTF spec
         */
-        var GLTFLoaderBase = (function () {
+        var GLTFLoaderBase = /** @class */ (function () {
             function GLTFLoaderBase() {
             }
             GLTFLoaderBase.CreateRuntime = function (parsedData, scene, rootUrl) {
@@ -1587,7 +1587,7 @@ var BABYLON;
         /**
         * glTF V1 Loader
         */
-        var GLTFLoader = (function () {
+        var GLTFLoader = /** @class */ (function () {
             function GLTFLoader() {
             }
             GLTFLoader.RegisterExtension = function (extension) {
@@ -1771,7 +1771,7 @@ var BABYLON;
         /**
         * Utils functions for GLTF
         */
-        var GLTFUtils = (function () {
+        var GLTFUtils = /** @class */ (function () {
             function GLTFUtils() {
             }
             /**
@@ -2021,7 +2021,7 @@ var BABYLON;
 (function (BABYLON) {
     var GLTF1;
     (function (GLTF1) {
-        var GLTFLoaderExtension = (function () {
+        var GLTFLoaderExtension = /** @class */ (function () {
             function GLTFLoaderExtension(name) {
                 this._name = name;
             }
@@ -2175,7 +2175,7 @@ var BABYLON;
         var BinaryExtensionBufferName = "binary_glTF";
         ;
         ;
-        var GLTFBinaryExtension = (function (_super) {
+        var GLTFBinaryExtension = /** @class */ (function (_super) {
             __extends(GLTFBinaryExtension, _super);
             function GLTFBinaryExtension() {
                 return _super.call(this, "KHR_binary_glTF") || this;
@@ -2252,7 +2252,7 @@ var BABYLON;
         ;
         ;
         ;
-        var GLTFMaterialsCommonExtension = (function (_super) {
+        var GLTFMaterialsCommonExtension = /** @class */ (function (_super) {
             __extends(GLTFMaterialsCommonExtension, _super);
             function GLTFMaterialsCommonExtension() {
                 return _super.call(this, "KHR_materials_common") || this;

dist/preview release/loaders/babylon.glTF2FileLoader.js

@@ -11,7 +11,7 @@ var BABYLON;
         // Sets the useRightHandedSystem flag on the scene.
         GLTFLoaderCoordinateSystemMode[GLTFLoaderCoordinateSystemMode["FORCE_RIGHT_HANDED"] = 2] = "FORCE_RIGHT_HANDED";
     })(GLTFLoaderCoordinateSystemMode = BABYLON.GLTFLoaderCoordinateSystemMode || (BABYLON.GLTFLoaderCoordinateSystemMode = {}));
-    var GLTFFileLoader = (function () {
+    var GLTFFileLoader = /** @class */ (function () {
         function GLTFFileLoader() {
             // V2 options
             this.coordinateSystemMode = GLTFLoaderCoordinateSystemMode.AUTO;
@@ -218,7 +218,7 @@ var BABYLON;
         return GLTFFileLoader;
     }());
     BABYLON.GLTFFileLoader = GLTFFileLoader;
-    var BinaryReader = (function () {
+    var BinaryReader = /** @class */ (function () {
         function BinaryReader(arrayBuffer) {
             this._arrayBuffer = arrayBuffer;
             this._dataView = new DataView(arrayBuffer);
@@ -309,7 +309,7 @@ var BABYLON;
 (function (BABYLON) {
     var GLTF2;
     (function (GLTF2) {
-        var GLTFLoaderTracker = (function () {
+        var GLTFLoaderTracker = /** @class */ (function () {
             function GLTFLoaderTracker(onComplete) {
                 this._pendingCount = 0;
                 this._callback = onComplete;
@@ -324,7 +324,7 @@ var BABYLON;
             };
             return GLTFLoaderTracker;
         }());
-        var GLTFLoader = (function () {
+        var GLTFLoader = /** @class */ (function () {
             function GLTFLoader(parent) {
                 this._renderReady = false;
                 this._disposed = false;
@@ -1541,7 +1541,7 @@ var BABYLON;
         /**
         * Utils functions for GLTF
         */
-        var GLTFUtils = (function () {
+        var GLTFUtils = /** @class */ (function () {
             function GLTFUtils() {
             }
             /**
@@ -1639,7 +1639,7 @@ var BABYLON;
 (function (BABYLON) {
     var GLTF2;
     (function (GLTF2) {
-        var GLTFLoaderExtension = (function () {
+        var GLTFLoaderExtension = /** @class */ (function () {
             function GLTFLoaderExtension() {
                 this.enabled = true;
             }
@@ -1715,7 +1715,7 @@ var BABYLON;
         var Extensions;
         (function (Extensions) {
             // See https://github.com/sbtron/glTF/tree/MSFT_lod/extensions/Vendor/MSFT_lod for more information about this extension.
-            var MSFTLOD = (function (_super) {
+            var MSFTLOD = /** @class */ (function (_super) {
                 __extends(MSFTLOD, _super);
                 function MSFTLOD() {
                     return _super !== null && _super.apply(this, arguments) || this;
@@ -1831,7 +1831,7 @@ var BABYLON;
     (function (GLTF2) {
         var Extensions;
         (function (Extensions) {
-            var KHRMaterialsPbrSpecularGlossiness = (function (_super) {
+            var KHRMaterialsPbrSpecularGlossiness = /** @class */ (function (_super) {
                 __extends(KHRMaterialsPbrSpecularGlossiness, _super);
                 function KHRMaterialsPbrSpecularGlossiness() {
                     return _super !== null && _super.apply(this, arguments) || this;

dist/preview release/loaders/babylon.glTFFileLoader.js

@@ -11,7 +11,7 @@ var BABYLON;
         // Sets the useRightHandedSystem flag on the scene.
         GLTFLoaderCoordinateSystemMode[GLTFLoaderCoordinateSystemMode["FORCE_RIGHT_HANDED"] = 2] = "FORCE_RIGHT_HANDED";
     })(GLTFLoaderCoordinateSystemMode = BABYLON.GLTFLoaderCoordinateSystemMode || (BABYLON.GLTFLoaderCoordinateSystemMode = {}));
-    var GLTFFileLoader = (function () {
+    var GLTFFileLoader = /** @class */ (function () {
         function GLTFFileLoader() {
             // V2 options
             this.coordinateSystemMode = GLTFLoaderCoordinateSystemMode.AUTO;
@@ -218,7 +218,7 @@ var BABYLON;
         return GLTFFileLoader;
     }());
     BABYLON.GLTFFileLoader = GLTFFileLoader;
-    var BinaryReader = (function () {
+    var BinaryReader = /** @class */ (function () {
         function BinaryReader(arrayBuffer) {
             this._arrayBuffer = arrayBuffer;
             this._dataView = new DataView(arrayBuffer);
@@ -364,7 +364,7 @@ var BABYLON;
             ETokenType[ETokenType["UNKNOWN"] = 2] = "UNKNOWN";
             ETokenType[ETokenType["END_OF_INPUT"] = 3] = "END_OF_INPUT";
         })(ETokenType || (ETokenType = {}));
-        var Tokenizer = (function () {
+        var Tokenizer = /** @class */ (function () {
             function Tokenizer(toParse) {
                 this._pos = 0;
                 this.isLetterOrDigitPattern = /^[a-zA-Z0-9]+$/;
@@ -1292,7 +1292,7 @@ var BABYLON;
         /**
         * Implementation of the base glTF spec
         */
-        var GLTFLoaderBase = (function () {
+        var GLTFLoaderBase = /** @class */ (function () {
             function GLTFLoaderBase() {
             }
             GLTFLoaderBase.CreateRuntime = function (parsedData, scene, rootUrl) {
@@ -1587,7 +1587,7 @@ var BABYLON;
         /**
         * glTF V1 Loader
         */
-        var GLTFLoader = (function () {
+        var GLTFLoader = /** @class */ (function () {
             function GLTFLoader() {
             }
             GLTFLoader.RegisterExtension = function (extension) {
@@ -1771,7 +1771,7 @@ var BABYLON;
         /**
         * Utils functions for GLTF
         */
-        var GLTFUtils = (function () {
+        var GLTFUtils = /** @class */ (function () {
             function GLTFUtils() {
             }
             /**
@@ -2021,7 +2021,7 @@ var BABYLON;
 (function (BABYLON) {
     var GLTF1;
     (function (GLTF1) {
-        var GLTFLoaderExtension = (function () {
+        var GLTFLoaderExtension = /** @class */ (function () {
             function GLTFLoaderExtension(name) {
                 this._name = name;
             }
@@ -2175,7 +2175,7 @@ var BABYLON;
         var BinaryExtensionBufferName = "binary_glTF";
         ;
         ;
-        var GLTFBinaryExtension = (function (_super) {
+        var GLTFBinaryExtension = /** @class */ (function (_super) {
             __extends(GLTFBinaryExtension, _super);
             function GLTFBinaryExtension() {
                 return _super.call(this, "KHR_binary_glTF") || this;
@@ -2252,7 +2252,7 @@ var BABYLON;
         ;
         ;
         ;
-        var GLTFMaterialsCommonExtension = (function (_super) {
+        var GLTFMaterialsCommonExtension = /** @class */ (function (_super) {
             __extends(GLTFMaterialsCommonExtension, _super);
             function GLTFMaterialsCommonExtension() {
                 return _super.call(this, "KHR_materials_common") || this;
@@ -2415,7 +2415,7 @@ var BABYLON;
 (function (BABYLON) {
     var GLTF2;
     (function (GLTF2) {
-        var GLTFLoaderTracker = (function () {
+        var GLTFLoaderTracker = /** @class */ (function () {
             function GLTFLoaderTracker(onComplete) {
                 this._pendingCount = 0;
                 this._callback = onComplete;
@@ -2430,7 +2430,7 @@ var BABYLON;
             };
             return GLTFLoaderTracker;
         }());
-        var GLTFLoader = (function () {
+        var GLTFLoader = /** @class */ (function () {
             function GLTFLoader(parent) {
                 this._renderReady = false;
                 this._disposed = false;
@@ -3647,7 +3647,7 @@ var BABYLON;
         /**
         * Utils functions for GLTF
         */
-        var GLTFUtils = (function () {
+        var GLTFUtils = /** @class */ (function () {
             function GLTFUtils() {
             }
             /**
@@ -3745,7 +3745,7 @@ var BABYLON;
 (function (BABYLON) {
     var GLTF2;
     (function (GLTF2) {
-        var GLTFLoaderExtension = (function () {
+        var GLTFLoaderExtension = /** @class */ (function () {
             function GLTFLoaderExtension() {
                 this.enabled = true;
             }
@@ -3821,7 +3821,7 @@ var BABYLON;
         var Extensions;
         (function (Extensions) {
             // See https://github.com/sbtron/glTF/tree/MSFT_lod/extensions/Vendor/MSFT_lod for more information about this extension.
-            var MSFTLOD = (function (_super) {
+            var MSFTLOD = /** @class */ (function (_super) {
                 __extends(MSFTLOD, _super);
                 function MSFTLOD() {
                     return _super !== null && _super.apply(this, arguments) || this;
@@ -3937,7 +3937,7 @@ var BABYLON;
     (function (GLTF2) {
         var Extensions;
         (function (Extensions) {
-            var KHRMaterialsPbrSpecularGlossiness = (function (_super) {
+            var KHRMaterialsPbrSpecularGlossiness = /** @class */ (function (_super) {
                 __extends(KHRMaterialsPbrSpecularGlossiness, _super);
                 function KHRMaterialsPbrSpecularGlossiness() {
                     return _super !== null && _super.apply(this, arguments) || this;

dist/preview release/loaders/babylon.objFileLoader.js

@@ -4,7 +4,7 @@ var BABYLON;
     /**
      * Class reading and parsing the MTL file bundled with the obj file.
      */
-    var MTLFileLoader = (function () {
+    var MTLFileLoader = /** @class */ (function () {
         function MTLFileLoader() {
             // All material loaded from the mtl will be set here
             this.materials = [];
@@ -203,7 +203,7 @@ var BABYLON;
         return MTLFileLoader;
     }());
     BABYLON.MTLFileLoader = MTLFileLoader;
-    var OBJFileLoader = (function () {
+    var OBJFileLoader = /** @class */ (function () {
         function OBJFileLoader() {
             this.name = "obj";
             this.extensions = ".obj";

dist/preview release/loaders/babylon.stlFileLoader.js

@@ -1,7 +1,7 @@
 /// <reference path="../../../dist/preview release/babylon.d.ts"/>
 var BABYLON;
 (function (BABYLON) {
-    var STLFileLoader = (function () {
+    var STLFileLoader = /** @class */ (function () {
         function STLFileLoader() {
             this.solidPattern = /solid (\S*)([\S\s]*)endsolid[ ]*(\S*)/g;
             this.facetsPattern = /facet([\s\S]*?)endfacet/g;

dist/preview release/loaders/babylonjs.loaders.js

@@ -19,7 +19,7 @@ var __extends = (this && this.__extends) || (function () {
         
 var BABYLON;
 (function (BABYLON) {
-    var STLFileLoader = (function () {
+    var STLFileLoader = /** @class */ (function () {
         function STLFileLoader() {
             this.solidPattern = /solid (\S*)([\S\s]*)endsolid[ ]*(\S*)/g;
             this.facetsPattern = /facet([\s\S]*?)endfacet/g;
@@ -187,7 +187,7 @@ var BABYLON;
     /**
      * Class reading and parsing the MTL file bundled with the obj file.
      */
-    var MTLFileLoader = (function () {
+    var MTLFileLoader = /** @class */ (function () {
         function MTLFileLoader() {
             // All material loaded from the mtl will be set here
             this.materials = [];
@@ -386,7 +386,7 @@ var BABYLON;
         return MTLFileLoader;
     }());
     BABYLON.MTLFileLoader = MTLFileLoader;
-    var OBJFileLoader = (function () {
+    var OBJFileLoader = /** @class */ (function () {
         function OBJFileLoader() {
             this.name = "obj";
             this.extensions = ".obj";
@@ -982,7 +982,7 @@ var BABYLON;
         // Sets the useRightHandedSystem flag on the scene.
         GLTFLoaderCoordinateSystemMode[GLTFLoaderCoordinateSystemMode["FORCE_RIGHT_HANDED"] = 2] = "FORCE_RIGHT_HANDED";
     })(GLTFLoaderCoordinateSystemMode = BABYLON.GLTFLoaderCoordinateSystemMode || (BABYLON.GLTFLoaderCoordinateSystemMode = {}));
-    var GLTFFileLoader = (function () {
+    var GLTFFileLoader = /** @class */ (function () {
         function GLTFFileLoader() {
             // V2 options
             this.coordinateSystemMode = GLTFLoaderCoordinateSystemMode.AUTO;
@@ -1189,7 +1189,7 @@ var BABYLON;
         return GLTFFileLoader;
     }());
     BABYLON.GLTFFileLoader = GLTFFileLoader;
-    var BinaryReader = (function () {
+    var BinaryReader = /** @class */ (function () {
         function BinaryReader(arrayBuffer) {
             this._arrayBuffer = arrayBuffer;
             this._dataView = new DataView(arrayBuffer);
@@ -1335,7 +1335,7 @@ var BABYLON;
             ETokenType[ETokenType["UNKNOWN"] = 2] = "UNKNOWN";
             ETokenType[ETokenType["END_OF_INPUT"] = 3] = "END_OF_INPUT";
         })(ETokenType || (ETokenType = {}));
-        var Tokenizer = (function () {
+        var Tokenizer = /** @class */ (function () {
             function Tokenizer(toParse) {
                 this._pos = 0;
                 this.isLetterOrDigitPattern = /^[a-zA-Z0-9]+$/;
@@ -2263,7 +2263,7 @@ var BABYLON;
         /**
         * Implementation of the base glTF spec
         */
-        var GLTFLoaderBase = (function () {
+        var GLTFLoaderBase = /** @class */ (function () {
             function GLTFLoaderBase() {
             }
             GLTFLoaderBase.CreateRuntime = function (parsedData, scene, rootUrl) {
@@ -2558,7 +2558,7 @@ var BABYLON;
         /**
         * glTF V1 Loader
         */
-        var GLTFLoader = (function () {
+        var GLTFLoader = /** @class */ (function () {
             function GLTFLoader() {
             }
             GLTFLoader.RegisterExtension = function (extension) {
@@ -2742,7 +2742,7 @@ var BABYLON;
         /**
         * Utils functions for GLTF
         */
-        var GLTFUtils = (function () {
+        var GLTFUtils = /** @class */ (function () {
             function GLTFUtils() {
             }
             /**
@@ -2992,7 +2992,7 @@ var BABYLON;
 (function (BABYLON) {
     var GLTF1;
     (function (GLTF1) {
-        var GLTFLoaderExtension = (function () {
+        var GLTFLoaderExtension = /** @class */ (function () {
             function GLTFLoaderExtension(name) {
                 this._name = name;
             }
@@ -3137,7 +3137,7 @@ var BABYLON;
         var BinaryExtensionBufferName = "binary_glTF";
         ;
         ;
-        var GLTFBinaryExtension = (function (_super) {
+        var GLTFBinaryExtension = /** @class */ (function (_super) {
             __extends(GLTFBinaryExtension, _super);
             function GLTFBinaryExtension() {
                 return _super.call(this, "KHR_binary_glTF") || this;
@@ -3205,7 +3205,7 @@ var BABYLON;
         ;
         ;
         ;
-        var GLTFMaterialsCommonExtension = (function (_super) {
+        var GLTFMaterialsCommonExtension = /** @class */ (function (_super) {
             __extends(GLTFMaterialsCommonExtension, _super);
             function GLTFMaterialsCommonExtension() {
                 return _super.call(this, "KHR_materials_common") || this;
@@ -3368,7 +3368,7 @@ var BABYLON;
 (function (BABYLON) {
     var GLTF2;
     (function (GLTF2) {
-        var GLTFLoaderTracker = (function () {
+        var GLTFLoaderTracker = /** @class */ (function () {
             function GLTFLoaderTracker(onComplete) {
                 this._pendingCount = 0;
                 this._callback = onComplete;
@@ -3383,7 +3383,7 @@ var BABYLON;
             };
             return GLTFLoaderTracker;
         }());
-        var GLTFLoader = (function () {
+        var GLTFLoader = /** @class */ (function () {
             function GLTFLoader(parent) {
                 this._renderReady = false;
                 this._disposed = false;
@@ -4600,7 +4600,7 @@ var BABYLON;
         /**
         * Utils functions for GLTF
         */
-        var GLTFUtils = (function () {
+        var GLTFUtils = /** @class */ (function () {
             function GLTFUtils() {
             }
             /**
@@ -4698,7 +4698,7 @@ var BABYLON;
 (function (BABYLON) {
     var GLTF2;
     (function (GLTF2) {
-        var GLTFLoaderExtension = (function () {
+        var GLTFLoaderExtension = /** @class */ (function () {
             function GLTFLoaderExtension() {
                 this.enabled = true;
             }
@@ -4765,7 +4765,7 @@ var BABYLON;
         var Extensions;
         (function (Extensions) {
             // See https://github.com/sbtron/glTF/tree/MSFT_lod/extensions/Vendor/MSFT_lod for more information about this extension.
-            var MSFTLOD = (function (_super) {
+            var MSFTLOD = /** @class */ (function (_super) {
                 __extends(MSFTLOD, _super);
                 function MSFTLOD() {
                     return _super !== null && _super.apply(this, arguments) || this;
@@ -4872,7 +4872,7 @@ var BABYLON;
     (function (GLTF2) {
         var Extensions;
         (function (Extensions) {
-            var KHRMaterialsPbrSpecularGlossiness = (function (_super) {
+            var KHRMaterialsPbrSpecularGlossiness = /** @class */ (function (_super) {
                 __extends(KHRMaterialsPbrSpecularGlossiness, _super);
                 function KHRMaterialsPbrSpecularGlossiness() {
                     return _super !== null && _super.apply(this, arguments) || this;

dist/preview release/materialsLibrary/babylon.cellMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var CellMaterialDefines = (function (_super) {
+    var CellMaterialDefines = /** @class */ (function (_super) {
         __extends(CellMaterialDefines, _super);
         function CellMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -43,7 +43,7 @@ var BABYLON;
         }
         return CellMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var CellMaterial = (function (_super) {
+    var CellMaterial = /** @class */ (function (_super) {
         __extends(CellMaterial, _super);
         function CellMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.customMaterial.js

@@ -18,7 +18,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 var BABYLON;
 (function (BABYLON) {
     // old version of standard material updated every 3 months
-    var StandardMaterialDefines_OldVer = (function (_super) {
+    var StandardMaterialDefines_OldVer = /** @class */ (function (_super) {
         __extends(StandardMaterialDefines_OldVer, _super);
         function StandardMaterialDefines_OldVer() {
             var _this = _super.call(this) || this;
@@ -111,7 +111,7 @@ var BABYLON;
         return StandardMaterialDefines_OldVer;
     }(BABYLON.MaterialDefines));
     BABYLON.StandardMaterialDefines_OldVer = StandardMaterialDefines_OldVer;
-    var StandardMaterial_OldVer = (function (_super) {
+    var StandardMaterial_OldVer = /** @class */ (function (_super) {
         __extends(StandardMaterial_OldVer, _super);
         function StandardMaterial_OldVer(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -1382,19 +1382,19 @@ var BABYLON;
         return StandardMaterial_OldVer;
     }(BABYLON.PushMaterial));
     BABYLON.StandardMaterial_OldVer = StandardMaterial_OldVer;
-    var CustomShaderStructure = (function () {
+    var CustomShaderStructure = /** @class */ (function () {
         function CustomShaderStructure() {
         }
         return CustomShaderStructure;
     }());
     BABYLON.CustomShaderStructure = CustomShaderStructure;
-    var ShaderSpecialParts = (function () {
+    var ShaderSpecialParts = /** @class */ (function () {
         function ShaderSpecialParts() {
         }
         return ShaderSpecialParts;
     }());
     BABYLON.ShaderSpecialParts = ShaderSpecialParts;
-    var ShaderForVer3_0 = (function (_super) {
+    var ShaderForVer3_0 = /** @class */ (function (_super) {
         __extends(ShaderForVer3_0, _super);
         function ShaderForVer3_0() {
             var _this = _super.call(this) || this;
@@ -1895,14 +1895,14 @@ vColor=color;\n\
         return ShaderForVer3_0;
     }(CustomShaderStructure));
     BABYLON.ShaderForVer3_0 = ShaderForVer3_0;
-    var StandardShaderVersions = (function () {
+    var StandardShaderVersions = /** @class */ (function () {
         function StandardShaderVersions() {
         }
         StandardShaderVersions.Ver3_0 = "3.0.0";
         return StandardShaderVersions;
     }());
     BABYLON.StandardShaderVersions = StandardShaderVersions;
-    var CustomMaterial = (function (_super) {
+    var CustomMaterial = /** @class */ (function (_super) {
         __extends(CustomMaterial, _super);
         function CustomMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.fireMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var FireMaterialDefines = (function (_super) {
+    var FireMaterialDefines = /** @class */ (function (_super) {
         __extends(FireMaterialDefines, _super);
         function FireMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -38,7 +38,7 @@ var BABYLON;
         }
         return FireMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var FireMaterial = (function (_super) {
+    var FireMaterial = /** @class */ (function (_super) {
         __extends(FireMaterial, _super);
         function FireMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.furMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var FurMaterialDefines = (function (_super) {
+    var FurMaterialDefines = /** @class */ (function (_super) {
         __extends(FurMaterialDefines, _super);
         function FurMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -42,7 +42,7 @@ var BABYLON;
         }
         return FurMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var FurMaterial = (function (_super) {
+    var FurMaterial = /** @class */ (function (_super) {
         __extends(FurMaterial, _super);
         function FurMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.gradientMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var GradientMaterialDefines = (function (_super) {
+    var GradientMaterialDefines = /** @class */ (function (_super) {
         __extends(GradientMaterialDefines, _super);
         function GradientMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -73,7 +73,7 @@ var BABYLON;
         }
         return GradientMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var GradientMaterial = (function (_super) {
+    var GradientMaterial = /** @class */ (function (_super) {
         __extends(GradientMaterial, _super);
         function GradientMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.gridMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var GridMaterialDefines = (function (_super) {
+    var GridMaterialDefines = /** @class */ (function (_super) {
         __extends(GridMaterialDefines, _super);
         function GridMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -33,7 +33,7 @@ var BABYLON;
      * The grid materials allows you to wrap any shape with a grid.
      * Colors are customizable.
      */
-    var GridMaterial = (function (_super) {
+    var GridMaterial = /** @class */ (function (_super) {
         __extends(GridMaterial, _super);
         /**
          * constructor

dist/preview release/materialsLibrary/babylon.lavaMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var LavaMaterialDefines = (function (_super) {
+    var LavaMaterialDefines = /** @class */ (function (_super) {
         __extends(LavaMaterialDefines, _super);
         function LavaMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -73,7 +73,7 @@ var BABYLON;
         }
         return LavaMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var LavaMaterial = (function (_super) {
+    var LavaMaterial = /** @class */ (function (_super) {
         __extends(LavaMaterial, _super);
         function LavaMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.legacyPbrMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var LegacyPBRMaterialDefines = (function (_super) {
+    var LegacyPBRMaterialDefines = /** @class */ (function (_super) {
         __extends(LegacyPBRMaterialDefines, _super);
         function LegacyPBRMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -110,7 +110,7 @@ var BABYLON;
      * For more information, please refer to the documentation :
      * http://doc.babylonjs.com/extensions/Physically_Based_Rendering
      */
-    var LegacyPBRMaterial = (function (_super) {
+    var LegacyPBRMaterial = /** @class */ (function (_super) {
         __extends(LegacyPBRMaterial, _super);
         /**
          * Instantiates a new PBRMaterial instance.

dist/preview release/materialsLibrary/babylon.normalMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var NormalMaterialDefines = (function (_super) {
+    var NormalMaterialDefines = /** @class */ (function (_super) {
         __extends(NormalMaterialDefines, _super);
         function NormalMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -73,7 +73,7 @@ var BABYLON;
         }
         return NormalMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var NormalMaterial = (function (_super) {
+    var NormalMaterial = /** @class */ (function (_super) {
         __extends(NormalMaterial, _super);
         function NormalMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.shadowOnlyMaterial.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var ShadowOnlyMaterialDefines = (function (_super) {
+    var ShadowOnlyMaterialDefines = /** @class */ (function (_super) {
         __extends(ShadowOnlyMaterialDefines, _super);
         function ShadowOnlyMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -27,7 +27,7 @@ var BABYLON;
         }
         return ShadowOnlyMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var ShadowOnlyMaterial = (function (_super) {
+    var ShadowOnlyMaterial = /** @class */ (function (_super) {
         __extends(ShadowOnlyMaterial, _super);
         function ShadowOnlyMaterial(name, scene) {
             return _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.simpleMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var SimpleMaterialDefines = (function (_super) {
+    var SimpleMaterialDefines = /** @class */ (function (_super) {
         __extends(SimpleMaterialDefines, _super);
         function SimpleMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -40,7 +40,7 @@ var BABYLON;
         }
         return SimpleMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var SimpleMaterial = (function (_super) {
+    var SimpleMaterial = /** @class */ (function (_super) {
         __extends(SimpleMaterial, _super);
         function SimpleMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.skyMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var SkyMaterialDefines = (function (_super) {
+    var SkyMaterialDefines = /** @class */ (function (_super) {
         __extends(SkyMaterialDefines, _super);
         function SkyMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -31,7 +31,7 @@ var BABYLON;
         }
         return SkyMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var SkyMaterial = (function (_super) {
+    var SkyMaterial = /** @class */ (function (_super) {
         __extends(SkyMaterial, _super);
         function SkyMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.terrainMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var TerrainMaterialDefines = (function (_super) {
+    var TerrainMaterialDefines = /** @class */ (function (_super) {
         __extends(TerrainMaterialDefines, _super);
         function TerrainMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -42,7 +42,7 @@ var BABYLON;
         }
         return TerrainMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var TerrainMaterial = (function (_super) {
+    var TerrainMaterial = /** @class */ (function (_super) {
         __extends(TerrainMaterial, _super);
         function TerrainMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.triPlanarMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var TriPlanarMaterialDefines = (function (_super) {
+    var TriPlanarMaterialDefines = /** @class */ (function (_super) {
         __extends(TriPlanarMaterialDefines, _super);
         function TriPlanarMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -44,7 +44,7 @@ var BABYLON;
         }
         return TriPlanarMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var TriPlanarMaterial = (function (_super) {
+    var TriPlanarMaterial = /** @class */ (function (_super) {
         __extends(TriPlanarMaterial, _super);
         function TriPlanarMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;

dist/preview release/materialsLibrary/babylon.waterMaterial.js

@@ -17,7 +17,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
 };
 var BABYLON;
 (function (BABYLON) {
-    var WaterMaterialDefines = (function (_super) {
+    var WaterMaterialDefines = /** @class */ (function (_super) {
         __extends(WaterMaterialDefines, _super);
         function WaterMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -46,7 +46,7 @@ var BABYLON;
         }
         return WaterMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var WaterMaterial = (function (_super) {
+    var WaterMaterial = /** @class */ (function (_super) {
         __extends(WaterMaterial, _super);
         /**
         * Constructor

dist/preview release/materialsLibrary/babylonjs.materials.js

@@ -20,7 +20,7 @@ var __extends = (this && this.__extends) || (function () {
 
 var BABYLON;
 (function (BABYLON) {
-    var ShadowOnlyMaterialDefines = (function (_super) {
+    var ShadowOnlyMaterialDefines = /** @class */ (function (_super) {
         __extends(ShadowOnlyMaterialDefines, _super);
         function ShadowOnlyMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -36,7 +36,7 @@ var BABYLON;
         }
         return ShadowOnlyMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var ShadowOnlyMaterial = (function (_super) {
+    var ShadowOnlyMaterial = /** @class */ (function (_super) {
         __extends(ShadowOnlyMaterial, _super);
         function ShadowOnlyMaterial(name, scene) {
             return _super.call(this, name, scene) || this;
@@ -221,7 +221,7 @@ BABYLON.Effect.ShadersStore['shadowOnlyPixelShader'] = "precision highp float;\n
 
 var BABYLON;
 (function (BABYLON) {
-    var GradientMaterialDefines = (function (_super) {
+    var GradientMaterialDefines = /** @class */ (function (_super) {
         __extends(GradientMaterialDefines, _super);
         function GradientMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -277,7 +277,7 @@ var BABYLON;
         }
         return GradientMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var GradientMaterial = (function (_super) {
+    var GradientMaterial = /** @class */ (function (_super) {
         __extends(GradientMaterial, _super);
         function GradientMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -496,7 +496,7 @@ BABYLON.Effect.ShadersStore['gradientPixelShader'] = "precision highp float;\n\n
 
 var BABYLON;
 (function (BABYLON) {
-    var NormalMaterialDefines = (function (_super) {
+    var NormalMaterialDefines = /** @class */ (function (_super) {
         __extends(NormalMaterialDefines, _super);
         function NormalMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -552,7 +552,7 @@ var BABYLON;
         }
         return NormalMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var NormalMaterial = (function (_super) {
+    var NormalMaterial = /** @class */ (function (_super) {
         __extends(NormalMaterial, _super);
         function NormalMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -798,7 +798,7 @@ BABYLON.Effect.ShadersStore['normalPixelShader'] = "precision highp float;\n\nun
 
 var BABYLON;
 (function (BABYLON) {
-    var LavaMaterialDefines = (function (_super) {
+    var LavaMaterialDefines = /** @class */ (function (_super) {
         __extends(LavaMaterialDefines, _super);
         function LavaMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -854,7 +854,7 @@ var BABYLON;
         }
         return LavaMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var LavaMaterial = (function (_super) {
+    var LavaMaterial = /** @class */ (function (_super) {
         __extends(LavaMaterial, _super);
         function LavaMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -1146,7 +1146,7 @@ BABYLON.Effect.ShadersStore['lavaPixelShader'] = "precision highp float;\n\nunif
 
 var BABYLON;
 (function (BABYLON) {
-    var SimpleMaterialDefines = (function (_super) {
+    var SimpleMaterialDefines = /** @class */ (function (_super) {
         __extends(SimpleMaterialDefines, _super);
         function SimpleMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -1169,7 +1169,7 @@ var BABYLON;
         }
         return SimpleMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var SimpleMaterial = (function (_super) {
+    var SimpleMaterial = /** @class */ (function (_super) {
         __extends(SimpleMaterial, _super);
         function SimpleMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -1415,7 +1415,7 @@ BABYLON.Effect.ShadersStore['simplePixelShader'] = "precision highp float;\n\nun
 
 var BABYLON;
 (function (BABYLON) {
-    var WaterMaterialDefines = (function (_super) {
+    var WaterMaterialDefines = /** @class */ (function (_super) {
         __extends(WaterMaterialDefines, _super);
         function WaterMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -1444,7 +1444,7 @@ var BABYLON;
         }
         return WaterMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var WaterMaterial = (function (_super) {
+    var WaterMaterial = /** @class */ (function (_super) {
         __extends(WaterMaterial, _super);
         /**
         * Constructor
@@ -2007,7 +2007,7 @@ BABYLON.Effect.ShadersStore['waterPixelShader'] = "#ifdef LOGARITHMICDEPTH\n#ext
 
 var BABYLON;
 (function (BABYLON) {
-    var FireMaterialDefines = (function (_super) {
+    var FireMaterialDefines = /** @class */ (function (_super) {
         __extends(FireMaterialDefines, _super);
         function FireMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -2028,7 +2028,7 @@ var BABYLON;
         }
         return FireMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var FireMaterial = (function (_super) {
+    var FireMaterial = /** @class */ (function (_super) {
         __extends(FireMaterial, _super);
         function FireMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -2322,7 +2322,7 @@ BABYLON.Effect.ShadersStore['firePixelShader'] = "precision highp float;\n\nunif
 
 var BABYLON;
 (function (BABYLON) {
-    var FurMaterialDefines = (function (_super) {
+    var FurMaterialDefines = /** @class */ (function (_super) {
         __extends(FurMaterialDefines, _super);
         function FurMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -2347,7 +2347,7 @@ var BABYLON;
         }
         return FurMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var FurMaterial = (function (_super) {
+    var FurMaterial = /** @class */ (function (_super) {
         __extends(FurMaterial, _super);
         function FurMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -2778,7 +2778,7 @@ BABYLON.Effect.ShadersStore['furPixelShader'] = "precision highp float;\n\nunifo
 
 var BABYLON;
 (function (BABYLON) {
-    var TerrainMaterialDefines = (function (_super) {
+    var TerrainMaterialDefines = /** @class */ (function (_super) {
         __extends(TerrainMaterialDefines, _super);
         function TerrainMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -2803,7 +2803,7 @@ var BABYLON;
         }
         return TerrainMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var TerrainMaterial = (function (_super) {
+    var TerrainMaterial = /** @class */ (function (_super) {
         __extends(TerrainMaterial, _super);
         function TerrainMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -3162,7 +3162,7 @@ BABYLON.Effect.ShadersStore['terrainPixelShader'] = "precision highp float;\n\nu
 
 var BABYLON;
 (function (BABYLON) {
-    var TriPlanarMaterialDefines = (function (_super) {
+    var TriPlanarMaterialDefines = /** @class */ (function (_super) {
         __extends(TriPlanarMaterialDefines, _super);
         function TriPlanarMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -3189,7 +3189,7 @@ var BABYLON;
         }
         return TriPlanarMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var TriPlanarMaterial = (function (_super) {
+    var TriPlanarMaterial = /** @class */ (function (_super) {
         __extends(TriPlanarMaterial, _super);
         function TriPlanarMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -3541,7 +3541,7 @@ BABYLON.Effect.ShadersStore['triplanarPixelShader'] = "precision highp float;\n\
 
 var BABYLON;
 (function (BABYLON) {
-    var SkyMaterialDefines = (function (_super) {
+    var SkyMaterialDefines = /** @class */ (function (_super) {
         __extends(SkyMaterialDefines, _super);
         function SkyMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -3555,7 +3555,7 @@ var BABYLON;
         }
         return SkyMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var SkyMaterial = (function (_super) {
+    var SkyMaterial = /** @class */ (function (_super) {
         __extends(SkyMaterial, _super);
         function SkyMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -3753,7 +3753,7 @@ BABYLON.Effect.ShadersStore['skyPixelShader'] = "precision highp float;\n\nvaryi
 
 var BABYLON;
 (function (BABYLON) {
-    var GridMaterialDefines = (function (_super) {
+    var GridMaterialDefines = /** @class */ (function (_super) {
         __extends(GridMaterialDefines, _super);
         function GridMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -3769,7 +3769,7 @@ var BABYLON;
      * The grid materials allows you to wrap any shape with a grid.
      * Colors are customizable.
      */
-    var GridMaterial = (function (_super) {
+    var GridMaterial = /** @class */ (function (_super) {
         __extends(GridMaterial, _super);
         /**
          * constructor
@@ -3947,7 +3947,7 @@ BABYLON.Effect.ShadersStore['gridPixelShader'] = "#extension GL_OES_standard_der
 var BABYLON;
 (function (BABYLON) {
     // old version of standard material updated every 3 months
-    var StandardMaterialDefines_OldVer = (function (_super) {
+    var StandardMaterialDefines_OldVer = /** @class */ (function (_super) {
         __extends(StandardMaterialDefines_OldVer, _super);
         function StandardMaterialDefines_OldVer() {
             var _this = _super.call(this) || this;
@@ -4040,7 +4040,7 @@ var BABYLON;
         return StandardMaterialDefines_OldVer;
     }(BABYLON.MaterialDefines));
     BABYLON.StandardMaterialDefines_OldVer = StandardMaterialDefines_OldVer;
-    var StandardMaterial_OldVer = (function (_super) {
+    var StandardMaterial_OldVer = /** @class */ (function (_super) {
         __extends(StandardMaterial_OldVer, _super);
         function StandardMaterial_OldVer(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -5311,19 +5311,19 @@ var BABYLON;
         return StandardMaterial_OldVer;
     }(BABYLON.PushMaterial));
     BABYLON.StandardMaterial_OldVer = StandardMaterial_OldVer;
-    var CustomShaderStructure = (function () {
+    var CustomShaderStructure = /** @class */ (function () {
         function CustomShaderStructure() {
         }
         return CustomShaderStructure;
     }());
     BABYLON.CustomShaderStructure = CustomShaderStructure;
-    var ShaderSpecialParts = (function () {
+    var ShaderSpecialParts = /** @class */ (function () {
         function ShaderSpecialParts() {
         }
         return ShaderSpecialParts;
     }());
     BABYLON.ShaderSpecialParts = ShaderSpecialParts;
-    var ShaderForVer3_0 = (function (_super) {
+    var ShaderForVer3_0 = /** @class */ (function (_super) {
         __extends(ShaderForVer3_0, _super);
         function ShaderForVer3_0() {
             var _this = _super.call(this) || this;
@@ -5824,14 +5824,14 @@ vColor=color;\n\
         return ShaderForVer3_0;
     }(CustomShaderStructure));
     BABYLON.ShaderForVer3_0 = ShaderForVer3_0;
-    var StandardShaderVersions = (function () {
+    var StandardShaderVersions = /** @class */ (function () {
         function StandardShaderVersions() {
         }
         StandardShaderVersions.Ver3_0 = "3.0.0";
         return StandardShaderVersions;
     }());
     BABYLON.StandardShaderVersions = StandardShaderVersions;
-    var CustomMaterial = (function (_super) {
+    var CustomMaterial = /** @class */ (function (_super) {
         __extends(CustomMaterial, _super);
         function CustomMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -5991,7 +5991,7 @@ vColor=color;\n\
 
 var BABYLON;
 (function (BABYLON) {
-    var CellMaterialDefines = (function (_super) {
+    var CellMaterialDefines = /** @class */ (function (_super) {
         __extends(CellMaterialDefines, _super);
         function CellMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -6017,7 +6017,7 @@ var BABYLON;
         }
         return CellMaterialDefines;
     }(BABYLON.MaterialDefines));
-    var CellMaterial = (function (_super) {
+    var CellMaterial = /** @class */ (function (_super) {
         __extends(CellMaterial, _super);
         function CellMaterial(name, scene) {
             var _this = _super.call(this, name, scene) || this;
@@ -6269,7 +6269,7 @@ BABYLON.Effect.ShadersStore['cellPixelShader'] = "precision highp float;\n\nunif
 
 var BABYLON;
 (function (BABYLON) {
-    var LegacyPBRMaterialDefines = (function (_super) {
+    var LegacyPBRMaterialDefines = /** @class */ (function (_super) {
         __extends(LegacyPBRMaterialDefines, _super);
         function LegacyPBRMaterialDefines() {
             var _this = _super.call(this) || this;
@@ -6362,7 +6362,7 @@ var BABYLON;
      * For more information, please refer to the documentation :
      * http://doc.babylonjs.com/extensions/Physically_Based_Rendering
      */
-    var LegacyPBRMaterial = (function (_super) {
+    var LegacyPBRMaterial = /** @class */ (function (_super) {
         __extends(LegacyPBRMaterial, _super);
         /**
          * Instantiates a new PBRMaterial instance.

dist/preview release/postProcessesLibrary/babylon.asciiArtPostProcess.js

@@ -23,7 +23,7 @@ var BABYLON;
      * It basically takes care rendering the font front the given font size to a texture.
      * This is used later on in the postprocess.
      */
-    var AsciiArtFontTexture = (function (_super) {
+    var AsciiArtFontTexture = /** @class */ (function (_super) {
         __extends(AsciiArtFontTexture, _super);
         /**
          * Create a new instance of the Ascii Art FontTexture class
@@ -160,7 +160,7 @@ var BABYLON;
      * Simmply add it to your scene and let the nerd that lives in you have fun.
      * Example usage: var pp = new AsciiArtPostProcess("myAscii", "20px Monospace", camera);
      */
-    var AsciiArtPostProcess = (function (_super) {
+    var AsciiArtPostProcess = /** @class */ (function (_super) {
         __extends(AsciiArtPostProcess, _super);
         /**
          * Instantiates a new Ascii Art Post Process.

dist/preview release/postProcessesLibrary/babylon.digitalRainPostProcess.js

@@ -23,7 +23,7 @@ var BABYLON;
      * It basically takes care rendering the font front the given font size to a texture.
      * This is used later on in the postprocess.
      */
-    var DigitalRainFontTexture = (function (_super) {
+    var DigitalRainFontTexture = /** @class */ (function (_super) {
         __extends(DigitalRainFontTexture, _super);
         /**
          * Create a new instance of the Digital Rain FontTexture class
@@ -160,7 +160,7 @@ var BABYLON;
      * Simmply add it to your scene and let the nerd that lives in you have fun.
      * Example usage: var pp = new DigitalRainPostProcess("digitalRain", "20px Monospace", camera);
      */
-    var DigitalRainPostProcess = (function (_super) {
+    var DigitalRainPostProcess = /** @class */ (function (_super) {
         __extends(DigitalRainPostProcess, _super);
         /**
          * Instantiates a new Digital Rain Post Process.

dist/preview release/postProcessesLibrary/babylonjs.postProcess.js

@@ -27,7 +27,7 @@ var BABYLON;
      * It basically takes care rendering the font front the given font size to a texture.
      * This is used later on in the postprocess.
      */
-    var AsciiArtFontTexture = (function (_super) {
+    var AsciiArtFontTexture = /** @class */ (function (_super) {
         __extends(AsciiArtFontTexture, _super);
         /**
          * Create a new instance of the Ascii Art FontTexture class
@@ -164,7 +164,7 @@ var BABYLON;
      * Simmply add it to your scene and let the nerd that lives in you have fun.
      * Example usage: var pp = new AsciiArtPostProcess("myAscii", "20px Monospace", camera);
      */
-    var AsciiArtPostProcess = (function (_super) {
+    var AsciiArtPostProcess = /** @class */ (function (_super) {
         __extends(AsciiArtPostProcess, _super);
         /**
          * Instantiates a new Ascii Art Post Process.
@@ -231,7 +231,7 @@ var BABYLON;
      * It basically takes care rendering the font front the given font size to a texture.
      * This is used later on in the postprocess.
      */
-    var DigitalRainFontTexture = (function (_super) {
+    var DigitalRainFontTexture = /** @class */ (function (_super) {
         __extends(DigitalRainFontTexture, _super);
         /**
          * Create a new instance of the Digital Rain FontTexture class
@@ -368,7 +368,7 @@ var BABYLON;
      * Simmply add it to your scene and let the nerd that lives in you have fun.
      * Example usage: var pp = new DigitalRainPostProcess("digitalRain", "20px Monospace", camera);
      */
-    var DigitalRainPostProcess = (function (_super) {
+    var DigitalRainPostProcess = /** @class */ (function (_super) {
         __extends(DigitalRainPostProcess, _super);
         /**
          * Instantiates a new Digital Rain Post Process.

dist/preview release/proceduralTexturesLibrary/babylon.brickProceduralTexture.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var BrickProceduralTexture = (function (_super) {
+    var BrickProceduralTexture = /** @class */ (function (_super) {
         __extends(BrickProceduralTexture, _super);
         function BrickProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "brickProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/proceduralTexturesLibrary/babylon.cloudProceduralTexture.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var CloudProceduralTexture = (function (_super) {
+    var CloudProceduralTexture = /** @class */ (function (_super) {
         __extends(CloudProceduralTexture, _super);
         function CloudProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "cloudProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/proceduralTexturesLibrary/babylon.fireProceduralTexture.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var FireProceduralTexture = (function (_super) {
+    var FireProceduralTexture = /** @class */ (function (_super) {
         __extends(FireProceduralTexture, _super);
         function FireProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "fireProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/proceduralTexturesLibrary/babylon.grassProceduralTexture.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var GrassProceduralTexture = (function (_super) {
+    var GrassProceduralTexture = /** @class */ (function (_super) {
         __extends(GrassProceduralTexture, _super);
         function GrassProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "grassProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/proceduralTexturesLibrary/babylon.marbleProceduralTexture.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var MarbleProceduralTexture = (function (_super) {
+    var MarbleProceduralTexture = /** @class */ (function (_super) {
         __extends(MarbleProceduralTexture, _super);
         function MarbleProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "marbleProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/proceduralTexturesLibrary/babylon.normalMapProceduralTexture.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var NormalMapProceduralTexture = (function (_super) {
+    var NormalMapProceduralTexture = /** @class */ (function (_super) {
         __extends(NormalMapProceduralTexture, _super);
         function NormalMapProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "normalMapProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/proceduralTexturesLibrary/babylon.perlinNoiseProceduralTexture.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var PerlinNoiseProceduralTexture = (function (_super) {
+    var PerlinNoiseProceduralTexture = /** @class */ (function (_super) {
         __extends(PerlinNoiseProceduralTexture, _super);
         function PerlinNoiseProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "perlinNoiseProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/proceduralTexturesLibrary/babylon.roadProceduralTexture.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var RoadProceduralTexture = (function (_super) {
+    var RoadProceduralTexture = /** @class */ (function (_super) {
         __extends(RoadProceduralTexture, _super);
         function RoadProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "roadProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/proceduralTexturesLibrary/babylon.starfieldProceduralTexture.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var StarfieldProceduralTexture = (function (_super) {
+    var StarfieldProceduralTexture = /** @class */ (function (_super) {
         __extends(StarfieldProceduralTexture, _super);
         function StarfieldProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "starfieldProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/proceduralTexturesLibrary/babylon.woodProceduralTexture.js

@@ -11,7 +11,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 var BABYLON;
 (function (BABYLON) {
-    var WoodProceduralTexture = (function (_super) {
+    var WoodProceduralTexture = /** @class */ (function (_super) {
         __extends(WoodProceduralTexture, _super);
         function WoodProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "woodProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/proceduralTexturesLibrary/babylonjs.proceduralTextures.js

@@ -20,7 +20,7 @@ var __extends = (this && this.__extends) || (function () {
 
 var BABYLON;
 (function (BABYLON) {
-    var WoodProceduralTexture = (function (_super) {
+    var WoodProceduralTexture = /** @class */ (function (_super) {
         __extends(WoodProceduralTexture, _super);
         function WoodProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "woodProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;
@@ -68,7 +68,7 @@ BABYLON.Effect.ShadersStore['woodProceduralTexturePixelShader'] = "precision hig
 
 var BABYLON;
 (function (BABYLON) {
-    var FireProceduralTexture = (function (_super) {
+    var FireProceduralTexture = /** @class */ (function (_super) {
         __extends(FireProceduralTexture, _super);
         function FireProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "fireProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;
@@ -211,7 +211,7 @@ BABYLON.Effect.ShadersStore['fireProceduralTexturePixelShader'] = "precision hig
 
 var BABYLON;
 (function (BABYLON) {
-    var CloudProceduralTexture = (function (_super) {
+    var CloudProceduralTexture = /** @class */ (function (_super) {
         __extends(CloudProceduralTexture, _super);
         function CloudProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "cloudProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;
@@ -259,7 +259,7 @@ BABYLON.Effect.ShadersStore['cloudProceduralTexturePixelShader'] = "precision hi
 
 var BABYLON;
 (function (BABYLON) {
-    var GrassProceduralTexture = (function (_super) {
+    var GrassProceduralTexture = /** @class */ (function (_super) {
         __extends(GrassProceduralTexture, _super);
         function GrassProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "grassProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;
@@ -313,7 +313,7 @@ BABYLON.Effect.ShadersStore['grassProceduralTexturePixelShader'] = "precision hi
 
 var BABYLON;
 (function (BABYLON) {
-    var RoadProceduralTexture = (function (_super) {
+    var RoadProceduralTexture = /** @class */ (function (_super) {
         __extends(RoadProceduralTexture, _super);
         function RoadProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "roadProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;
@@ -348,7 +348,7 @@ BABYLON.Effect.ShadersStore['roadProceduralTexturePixelShader'] = "precision hig
 
 var BABYLON;
 (function (BABYLON) {
-    var BrickProceduralTexture = (function (_super) {
+    var BrickProceduralTexture = /** @class */ (function (_super) {
         __extends(BrickProceduralTexture, _super);
         function BrickProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "brickProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;
@@ -422,7 +422,7 @@ BABYLON.Effect.ShadersStore['brickProceduralTexturePixelShader'] = "precision hi
 
 var BABYLON;
 (function (BABYLON) {
-    var MarbleProceduralTexture = (function (_super) {
+    var MarbleProceduralTexture = /** @class */ (function (_super) {
         __extends(MarbleProceduralTexture, _super);
         function MarbleProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "marbleProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;
@@ -496,7 +496,7 @@ BABYLON.Effect.ShadersStore['marbleProceduralTexturePixelShader'] = "precision h
 
 var BABYLON;
 (function (BABYLON) {
-    var StarfieldProceduralTexture = (function (_super) {
+    var StarfieldProceduralTexture = /** @class */ (function (_super) {
         __extends(StarfieldProceduralTexture, _super);
         function StarfieldProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "starfieldProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;
@@ -661,7 +661,7 @@ BABYLON.Effect.ShadersStore['starfieldProceduralTexturePixelShader'] = "precisio
 
 var BABYLON;
 (function (BABYLON) {
-    var NormalMapProceduralTexture = (function (_super) {
+    var NormalMapProceduralTexture = /** @class */ (function (_super) {
         __extends(NormalMapProceduralTexture, _super);
         function NormalMapProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "normalMapProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;
@@ -704,7 +704,7 @@ BABYLON.Effect.ShadersStore['normalMapProceduralTexturePixelShader'] = "precisio
 
 var BABYLON;
 (function (BABYLON) {
-    var PerlinNoiseProceduralTexture = (function (_super) {
+    var PerlinNoiseProceduralTexture = /** @class */ (function (_super) {
         __extends(PerlinNoiseProceduralTexture, _super);
         function PerlinNoiseProceduralTexture(name, size, scene, fallbackTexture, generateMipMaps) {
             var _this = _super.call(this, name, size, "perlinNoiseProceduralTexture", scene, fallbackTexture, generateMipMaps) || this;

dist/preview release/serializers/babylon.objSerializer.js

@@ -1,7 +1,7 @@
 /// <reference path="../../../dist/preview release/babylon.d.ts"/>
 var BABYLON;
 (function (BABYLON) {
-    var OBJExport = (function () {
+    var OBJExport = /** @class */ (function () {
         function OBJExport() {
         }
         //Exports the geometrys of a Mesh array in .OBJ file format (text)

dist/preview release/serializers/babylonjs.serializers.js

@@ -19,7 +19,7 @@ var __extends = (this && this.__extends) || (function () {
         
 var BABYLON;
 (function (BABYLON) {
-    var OBJExport = (function () {
+    var OBJExport = /** @class */ (function () {
         function OBJExport() {
         }
         //Exports the geometrys of a Mesh array in .OBJ file format (text)

src/Cameras/VR/babylon.vrExperienceHelper.ts

@@ -16,7 +16,7 @@ module BABYLON {
         // Are we presenting in the fullscreen fallback?
         private _fullscreenVRpresenting = false;
 
-        private _canvas: HTMLCanvasElement;
+        private _canvas: Nullable<HTMLCanvasElement>;
         private _webVRCamera: WebVRFreeCamera;
         private _vrDeviceOrientationCamera: VRDeviceOrientationFreeCamera;
         private _deviceOrientationCamera: DeviceOrientationCamera;
@@ -48,7 +48,9 @@ module BABYLON {
             this._scene.activeCamera = this._deviceOrientationCamera;
             this._position = this._scene.activeCamera.position;
             this._canvas = scene.getEngine().getRenderingCanvas();
-            this._scene.activeCamera.attachControl(this._canvas);
+            if (this._canvas) {
+                this._scene.activeCamera.attachControl(this._canvas);
+            }
 
             this._btnVR = <HTMLButtonElement>document.createElement("BUTTON");
             this._btnVR.className = "babylonVRicon";
@@ -65,20 +67,24 @@ module BABYLON {
             style.appendChild(document.createTextNode(css));
             document.getElementsByTagName('head')[0].appendChild(style);  
 
-            this._btnVR.style.top = this._canvas.offsetTop + this._canvas.offsetHeight - 70 + "px";
-            this._btnVR.style.left = this._canvas.offsetLeft + this._canvas.offsetWidth - 100 + "px";
-            this._btnVR.addEventListener("click", () => {
-                this.enterVR();
-            });
-
-            window.addEventListener("resize", () => {
+            if (this._canvas) {
                 this._btnVR.style.top = this._canvas.offsetTop + this._canvas.offsetHeight - 70 + "px";
                 this._btnVR.style.left = this._canvas.offsetLeft + this._canvas.offsetWidth - 100 + "px";
+                this._btnVR.addEventListener("click", () => {
+                    this.enterVR();
+                });
+
+                window.addEventListener("resize", () => {
+                    if (this._canvas) {
+                        this._btnVR.style.top = this._canvas.offsetTop + this._canvas.offsetHeight - 70 + "px";
+                        this._btnVR.style.left = this._canvas.offsetLeft + this._canvas.offsetWidth - 100 + "px";
+                    }
 
-                if (this._fullscreenVRpresenting && this._webVRready) {
-                    this.exitVR();
-                }
-            });
+                    if (this._fullscreenVRpresenting && this._webVRready) {
+                        this.exitVR();
+                    }
+                });
+            }
 
             document.addEventListener("fullscreenchange", () => { this._onFullscreenChange() }, false);
             document.addEventListener("mozfullscreenchange", () => { this._onFullscreenChange() }, false);
@@ -146,7 +152,7 @@ module BABYLON {
             } else if (document.msIsFullScreen !== undefined) {
                 this._fullscreenVRpresenting = document.msIsFullScreen;
             }
-            if (!this._fullscreenVRpresenting) {
+            if (!this._fullscreenVRpresenting && this._canvas) {
                 this.exitVR();
                 this._btnVR.style.top = this._canvas.offsetTop + this._canvas.offsetHeight - 70 + "px";
                 this._btnVR.style.left = this._canvas.offsetLeft + this._canvas.offsetWidth - 100 + "px";
@@ -221,7 +227,9 @@ module BABYLON {
                 this.updateButtonVisibility();
             }
             
-            this._scene.activeCamera.attachControl(this._canvas);
+            if (this._scene.activeCamera && this._canvas) {
+                this._scene.activeCamera.attachControl(this._canvas);
+            }
         }
 
         /**
@@ -239,7 +247,10 @@ module BABYLON {
             }
             this._deviceOrientationCamera.position = this._position;
             this._scene.activeCamera = this._deviceOrientationCamera;
-            this._scene.activeCamera.attachControl(this._canvas);
+
+            if (this._canvas) {
+                this._scene.activeCamera.attachControl(this._canvas);
+            }
 
             this.updateButtonVisibility();
         }
@@ -250,7 +261,10 @@ module BABYLON {
 
         public set position(value: Vector3) {
             this._position = value;
-            this._scene.activeCamera.position = value;
+
+            if (this._scene.activeCamera) {
+                this._scene.activeCamera.position = value;
+            }
         }
 
         public dispose() {

src/Cameras/VR/babylon.webVRCamera.ts

@@ -24,7 +24,7 @@ module BABYLON {
         rotationQuaternion: Quaternion;
         devicePosition?: Vector3;
         deviceRotationQuaternion: Quaternion;
-        rawPose: DevicePose;
+        rawPose: Nullable<DevicePose>;
         deviceScaleFactor: number;
         updateFromDevice(poseData: DevicePose): void;
     }
@@ -39,7 +39,7 @@ module BABYLON {
 
     export class WebVRFreeCamera extends FreeCamera implements PoseControlled {
         public _vrDevice: any = null;
-        public rawPose: DevicePose = null;
+        public rawPose: Nullable<DevicePose> = null;
         private _onVREnabled: (success: boolean) => void;
         private _specsVersion: string = "1.1";
         private _attached: boolean = false;
@@ -149,18 +149,18 @@ module BABYLON {
             super.dispose();
         }
 
-        public getControllerByName(name: string): WebVRController {
+        public getControllerByName(name: string): Nullable<WebVRController> {
             for (var gp of this.controllers) {
                 if (gp.hand === name) {
                     return gp;
                 }
             }
 
-            return undefined;
+            return null;
         }
 
-        private _leftController: WebVRController;
-        public get leftController(): WebVRController {
+        private _leftController: Nullable<WebVRController>;
+        public get leftController(): Nullable<WebVRController> {
             if (!this._leftController) {
                 this._leftController = this.getControllerByName("left");
             }
@@ -168,8 +168,8 @@ module BABYLON {
             return this._leftController;
         };
 
-        private _rightController: WebVRController;
-        public get rightController(): WebVRController {
+        private _rightController: Nullable<WebVRController>;
+        public get rightController(): Nullable<WebVRController> {
             if (!this._rightController) {
                 this._rightController = this.getControllerByName("right");
             }
@@ -199,7 +199,7 @@ module BABYLON {
         updateFromDevice(poseData: DevicePose) {
             if (poseData && poseData.orientation) {
                 this.rawPose = poseData;
-                this.deviceRotationQuaternion.copyFromFloats(this.rawPose.orientation[0], this.rawPose.orientation[1], -this.rawPose.orientation[2], -this.rawPose.orientation[3]);
+                this.deviceRotationQuaternion.copyFromFloats(poseData.orientation[0], poseData.orientation[1], -poseData.orientation[2], -poseData.orientation[3]);
 
                 if (this.getScene().useRightHandedSystem) {
                     this.deviceRotationQuaternion.z *= -1;

src/Cameras/babylon.arcRotateCamera.ts

@@ -14,7 +14,7 @@ module BABYLON {
 
         @serializeAsVector3("target")
         protected _target: Vector3;
-        protected _targetHost: AbstractMesh;
+        protected _targetHost: Nullable<AbstractMesh>;
 
         public get target(): Vector3 {
             return this._target;
@@ -33,10 +33,10 @@ module BABYLON {
         public inertialRadiusOffset = 0;
 
         @serialize()
-        public lowerAlphaLimit: number = null;
+        public lowerAlphaLimit: Nullable<number> = null;
 
         @serialize()
-        public upperAlphaLimit: number = null;
+        public upperAlphaLimit: Nullable<number> = null;
 
         @serialize()
         public lowerBetaLimit = 0.01;
@@ -45,10 +45,10 @@ module BABYLON {
         public upperBetaLimit = Math.PI;
 
         @serialize()
-        public lowerRadiusLimit: number = null;
+        public lowerRadiusLimit: Nullable<number> = null;
 
         @serialize()
-        public upperRadiusLimit: number = null;
+        public upperRadiusLimit: Nullable<number> = null;
 
         @serialize()
         public inertialPanningX: number = 0;
@@ -60,7 +60,7 @@ module BABYLON {
         public pinchToPanMaxDistance: number = 20;
 
         @serialize()
-        public panningDistanceLimit: number = null;
+        public panningDistanceLimit: Nullable<number> = null;
 
         @serializeAsVector3()
         public panningOriginTarget: Vector3 = Vector3.Zero();
@@ -74,7 +74,7 @@ module BABYLON {
             if (pointers)
                 return pointers.angularSensibilityX;
 
-            return null;
+            return 0;
         }
 
         public set angularSensibilityX(value: number) {
@@ -89,7 +89,7 @@ module BABYLON {
             if (pointers)
                 return pointers.angularSensibilityY;
             
-            return null;
+            return 0;
         }
 
         public set angularSensibilityY(value: number) {
@@ -104,7 +104,7 @@ module BABYLON {
             if (pointers)
                 return pointers.pinchPrecision;
 
-            return null;
+            return 0;
         }
 
         public set pinchPrecision(value: number) {
@@ -119,7 +119,7 @@ module BABYLON {
             if (pointers)
                 return pointers.pinchDeltaPercentage;
 
-            return null;
+            return 0;
         }
 
         public set pinchDeltaPercentage(value: number) {
@@ -134,7 +134,7 @@ module BABYLON {
             if (pointers)
                 return pointers.panningSensibility;
 
-            return null;
+            return 0;
         }
 
         public set panningSensibility(value: number) {
@@ -149,7 +149,7 @@ module BABYLON {
             if (keyboard)
                 return keyboard.keysUp;
 
-            return null;
+            return [];
         }
 
         public set keysUp(value: number[]) {
@@ -163,7 +163,7 @@ module BABYLON {
             if (keyboard)
                 return keyboard.keysDown;
 
-            return null;
+            return [];
         }
 
         public set keysDown(value: number[]) {
@@ -177,7 +177,7 @@ module BABYLON {
             if (keyboard)
                 return keyboard.keysLeft;
 
-            return null;
+            return [];
         }
 
         public set keysLeft(value: number[]) {
@@ -191,7 +191,7 @@ module BABYLON {
             if (keyboard)
                 return keyboard.keysRight;
 
-            return null;
+            return [];
         }
 
         public set keysRight(value: number[]) {
@@ -205,7 +205,7 @@ module BABYLON {
             if (mousewheel)
                 return mousewheel.wheelPrecision;
 
-            return null;
+            return 0;
         }
 
         public set wheelPrecision(value: number) {
@@ -219,7 +219,7 @@ module BABYLON {
             if (mousewheel)
                 return mousewheel.wheelDeltaPercentage;
 
-            return null;
+            return 0;
         }
 
         public set wheelDeltaPercentage(value: number) {
@@ -251,9 +251,9 @@ module BABYLON {
         protected _transformedDirection: Vector3;
 
         // Behaviors
-        private _bouncingBehavior: BouncingBehavior;
+        private _bouncingBehavior: Nullable<BouncingBehavior>;
 
-        public get bouncingBehavior(): BouncingBehavior {
+        public get bouncingBehavior(): Nullable<BouncingBehavior> {
             return this._bouncingBehavior;
         }
 
@@ -269,15 +269,15 @@ module BABYLON {
             if (value) {
                 this._bouncingBehavior = new BouncingBehavior();
                 this.addBehavior(this._bouncingBehavior);
-            } else {
+            } else if (this._bouncingBehavior) {
                 this.removeBehavior(this._bouncingBehavior);
                 this._bouncingBehavior = null;
             }
         }
 
-        private _framingBehavior: FramingBehavior;
+        private _framingBehavior: Nullable<FramingBehavior>;
 
-        public get framingBehavior(): FramingBehavior {
+        public get framingBehavior(): Nullable<FramingBehavior> {
             return this._framingBehavior;
         }        
 
@@ -293,15 +293,15 @@ module BABYLON {
             if (value) {
                 this._framingBehavior = new FramingBehavior();
                 this.addBehavior(this._framingBehavior);
-            } else {
+            } else if (this._framingBehavior) {
                 this.removeBehavior(this._framingBehavior);
                 this._framingBehavior = null;
             }
         }        
 
-        private _autoRotationBehavior: AutoRotationBehavior;
+        private _autoRotationBehavior: Nullable<AutoRotationBehavior>;
 
-        public get autoRotationBehavior(): AutoRotationBehavior {
+        public get autoRotationBehavior(): Nullable<AutoRotationBehavior> {
             return this._autoRotationBehavior;
         }   
 
@@ -317,7 +317,7 @@ module BABYLON {
             if (value) {
                 this._autoRotationBehavior = new AutoRotationBehavior();
                 this.addBehavior(this._autoRotationBehavior);
-            } else {
+            } else if(this._autoRotationBehavior) {
                 this.removeBehavior(this._autoRotationBehavior);
                 this._autoRotationBehavior = null;
             }
@@ -339,7 +339,7 @@ module BABYLON {
         //due to async collision inspection
         protected _collisionTriggered: boolean;
 
-        protected _targetBoundingCenter: Vector3;
+        protected _targetBoundingCenter: Nullable<Vector3>;
 
         constructor(name: string, alpha: number, beta: number, radius: number, target: Vector3, scene: Scene) {
             super(name, Vector3.Zero(), scene);
@@ -685,7 +685,7 @@ module BABYLON {
             return this._viewMatrix;
         }
 
-        protected _onCollisionPositionChange = (collisionId: number, newPosition: Vector3, collidedMesh: AbstractMesh = null) => {
+        protected _onCollisionPositionChange = (collisionId: number, newPosition: Vector3, collidedMesh: Nullable<AbstractMesh> = null) => {
 
             if (this.getScene().workerCollisions && this.checkCollisions) {
                 newPosition.multiplyInPlace(this._collider.radius);
@@ -766,7 +766,7 @@ module BABYLON {
          * Override Camera.createRigCamera
          */
         public createRigCamera(name: string, cameraIndex: number): Camera {
-            var alphaShift : number;
+            var alphaShift : number = 0;
             switch (this.cameraRigMode) {
                 case Camera.RIG_MODE_STEREOSCOPIC_ANAGLYPH:
                 case Camera.RIG_MODE_STEREOSCOPIC_SIDEBYSIDE_PARALLEL:

src/Cameras/babylon.cameraInputsManager.ts

@@ -2,7 +2,7 @@ module BABYLON {
     export var CameraInputTypes = {};
 
     export interface ICameraInput<TCamera extends BABYLON.Camera> {
-        camera: TCamera;
+        camera: Nullable<TCamera>;
         getClassName(): string;
         getSimpleName(): string;
         attachControl: (element: HTMLElement, noPreventDefault?: boolean) => void;
@@ -17,7 +17,7 @@ module BABYLON {
 
     export class CameraInputsManager<TCamera extends BABYLON.Camera> {
         attached: CameraInputsMap<TCamera>;
-        public attachedElement: HTMLElement;
+        public attachedElement: Nullable<HTMLElement>;
         public noPreventDefault: boolean;
         camera: TCamera;
         checkInputs: () => void;
@@ -53,7 +53,7 @@ module BABYLON {
         public remove(inputToRemove: ICameraInput<TCamera>) {
             for (var cam in this.attached) {
                 var input = this.attached[cam];
-                if (input === inputToRemove) {
+                if (input === inputToRemove && this.attachedElement) {
                     input.detachControl(this.attachedElement);
                     input.camera = null;
                     delete this.attached[cam];
@@ -65,7 +65,7 @@ module BABYLON {
         public removeByType(inputType: string) {
             for (var cam in this.attached) {
                 var input = this.attached[cam];
-                if (input.getClassName() === inputType) {
+                if (input.getClassName() === inputType && this.attachedElement) {
                     input.detachControl(this.attachedElement);
                     input.camera = null;
                     delete this.attached[cam];
@@ -83,10 +83,12 @@ module BABYLON {
         }
 
         public attachInput(input: ICameraInput<TCamera>) {
-            input.attachControl(this.attachedElement, this.noPreventDefault);
+            if (this.attachedElement) {
+                input.attachControl(this.attachedElement, this.noPreventDefault);
+            }
         }
 
-        public attachElement(element: HTMLElement, noPreventDefault?: boolean) {
+        public attachElement(element: HTMLElement, noPreventDefault: boolean = false) {
             if (this.attachedElement) {
                 return;
             }

src/Cameras/babylon.freeCamera.ts

@@ -12,71 +12,71 @@
         public inputs : FreeCameraInputsManager;
         
         //-- begin properties for backward compatibility for inputs
-        public get angularSensibility() {
+        public get angularSensibility(): number {
             var mouse = <FreeCameraMouseInput>this.inputs.attached["mouse"];
             if (mouse)
                 return mouse.angularSensibility;
 
-            return null;
+            return 0;
         }
         
-        public set angularSensibility(value) {
+        public set angularSensibility(value: number) {
             var mouse = <FreeCameraMouseInput>this.inputs.attached["mouse"];
             if (mouse)
                 mouse.angularSensibility = value;
         }
         
-        public get keysUp() {
+        public get keysUp(): number[] {
             var keyboard = <FreeCameraKeyboardMoveInput>this.inputs.attached["keyboard"];
             if (keyboard)
                 return keyboard.keysUp;
 
-            return null;
+            return [];
         }
         
-        public set keysUp(value) {
+        public set keysUp(value: number[]) {
             var keyboard = <FreeCameraKeyboardMoveInput>this.inputs.attached["keyboard"];
             if (keyboard)
                 keyboard.keysUp = value;
         }
         
-        public get keysDown() {
+        public get keysDown(): number[] {
             var keyboard = <FreeCameraKeyboardMoveInput>this.inputs.attached["keyboard"];
             if (keyboard)
                 return keyboard.keysDown;
 
-            return null;
+            return [];
         }
         
-        public set keysDown(value) {
+        public set keysDown(value: number[]) {
             var keyboard = <FreeCameraKeyboardMoveInput>this.inputs.attached["keyboard"];
             if (keyboard)
                 keyboard.keysDown = value;
         }
         
-        public get keysLeft() {
+        public get keysLeft(): number[] {
             var keyboard = <FreeCameraKeyboardMoveInput>this.inputs.attached["keyboard"];
             if (keyboard)
                 return keyboard.keysLeft;
 
-            return null;
+            return [];
         }
         
-        public set keysLeft(value) {
+        public set keysLeft(value: number[]) {
             var keyboard = <FreeCameraKeyboardMoveInput>this.inputs.attached["keyboard"];
             if (keyboard)
                 keyboard.keysLeft = value;
         }
         
-        public get keysRight() {
+        public get keysRight(): number[] {
             var keyboard = <FreeCameraKeyboardMoveInput>this.inputs.attached["keyboard"];
             if (keyboard)
                 return keyboard.keysRight;
 
-            return null;
+            return [];
         }
         
-        public set keysRight(value) {
+        public set keysRight(value: number[]) {
             var keyboard = <FreeCameraKeyboardMoveInput>this.inputs.attached["keyboard"];
             if (keyboard)
                 keyboard.keysRight = value;
@@ -155,7 +155,7 @@
 
         }
 
-        private _onCollisionPositionChange = (collisionId: number, newPosition: Vector3, collidedMesh: AbstractMesh = null) => {
+        private _onCollisionPositionChange = (collisionId: number, newPosition: Vector3, collidedMesh: Nullable<AbstractMesh> = null) => {
             //TODO move this to the collision coordinator!
             if (this.getScene().workerCollisions)
                 newPosition.multiplyInPlace(this._collider.radius);

src/Cameras/babylon.gamepadCamera.ts

@@ -4,29 +4,29 @@ module BABYLON {
     // We're mainly based on the logic defined into the FreeCamera code
     export class GamepadCamera extends UniversalCamera {
         //-- Begin properties for backward compatibility for inputs
-        public get gamepadAngularSensibility() {
+        public get gamepadAngularSensibility(): number {
             var gamepad = <FreeCameraGamepadInput>this.inputs.attached["gamepad"];
             if (gamepad)
                 return gamepad.gamepadAngularSensibility;
 
-            return null;
+            return 0;
         }
         
-        public set gamepadAngularSensibility(value) {
+        public set gamepadAngularSensibility(value: number) {
             var gamepad = <FreeCameraGamepadInput>this.inputs.attached["gamepad"];
             if (gamepad)
                 gamepad.gamepadAngularSensibility = value;
         }
         
-        public get gamepadMoveSensibility() {
+        public get gamepadMoveSensibility(): number {
             var gamepad = <FreeCameraGamepadInput>this.inputs.attached["gamepad"];
             if (gamepad)
                 return gamepad.gamepadMoveSensibility;
 
-            return null;
+            return 0;
         }
         
-        public set gamepadMoveSensibility(value) {
+        public set gamepadMoveSensibility(value: number) {
             var gamepad = <FreeCameraGamepadInput>this.inputs.attached["gamepad"];
             if (gamepad)
                 gamepad.gamepadMoveSensibility = value;

src/Cameras/babylon.targetCamera.ts

@@ -45,7 +45,7 @@ module BABYLON {
             return this.globalPosition.add(direction);
         }
 
-        public _getLockedTargetPosition(): Vector3 {
+        public _getLockedTargetPosition(): Nullable<Vector3> {
             if (!this.lockedTarget) {
                 return null;
             }
@@ -287,7 +287,11 @@ module BABYLON {
                 // Computing target and final matrix
                 this.position.addToRef(this._transformedReferencePoint, this._currentTarget);
             } else {
-                this._currentTarget.copyFrom(this._getLockedTargetPosition());
+                let targetPosition = this._getLockedTargetPosition();
+
+                if (targetPosition) {
+                    this._currentTarget.copyFrom(targetPosition);
+                }
             }
 
             if (this.getScene().useRightHandedSystem) {
@@ -303,7 +307,7 @@ module BABYLON {
          * @override
          * Override Camera.createRigCamera
          */
-        public createRigCamera(name: string, cameraIndex: number): Camera {
+        public createRigCamera(name: string, cameraIndex: number): Nullable<Camera> {
             if (this.cameraRigMode !== Camera.RIG_MODE_NONE) {
                 var rigCamera = new TargetCamera(name, this.position.clone(), this.getScene());
                 if (this.cameraRigMode === Camera.RIG_MODE_VR || this.cameraRigMode === Camera.RIG_MODE_WEBVR) {

src/Cameras/babylon.touchCamera.ts

@@ -4,29 +4,29 @@ module BABYLON {
     // We're mainly based on the logic defined into the FreeCamera code
     export class TouchCamera extends FreeCamera {
         //-- Begin properties for backward compatibility for inputs
-        public get touchAngularSensibility() {
+        public get touchAngularSensibility(): number {
             var touch = <FreeCameraTouchInput>this.inputs.attached["touch"];
             if (touch)
                 return touch.touchAngularSensibility;
 
-            return null;
+            return 0;
         }
         
-        public set touchAngularSensibility(value) {
+        public set touchAngularSensibility(value: number) {
             var touch = <FreeCameraTouchInput>this.inputs.attached["touch"];
             if (touch)
                 touch.touchAngularSensibility = value;
         }
         
-        public get touchMoveSensibility() {
+        public get touchMoveSensibility(): number {
             var touch = <FreeCameraTouchInput>this.inputs.attached["touch"];
             if (touch)
                 return touch.touchMoveSensibility;
 
-            return null;
+            return 0;
         }
         
-        public set touchMoveSensibility(value) {
+        public set touchMoveSensibility(value: number) {
             var touch = <FreeCameraTouchInput>this.inputs.attached["touch"];
             if (touch)
                 touch.touchMoveSensibility = value;

src/Cameras/babylon.universalCamera.ts

@@ -4,29 +4,29 @@ module BABYLON {
     // We're mainly based on the logic defined into the FreeCamera code
     export class UniversalCamera extends TouchCamera {
         //-- Begin properties for backward compatibility for inputs
-        public get gamepadAngularSensibility() {
+        public get gamepadAngularSensibility(): number {
             var gamepad = <FreeCameraGamepadInput>this.inputs.attached["gamepad"];
             if (gamepad)
                 return gamepad.gamepadAngularSensibility;
 
-            return null;                
+            return 0;                
         }
         
-        public set gamepadAngularSensibility(value) {
+        public set gamepadAngularSensibility(value: number) {
             var gamepad = <FreeCameraGamepadInput>this.inputs.attached["gamepad"];
             if (gamepad)
                 gamepad.gamepadAngularSensibility = value;
         }
         
-        public get gamepadMoveSensibility() {
+        public get gamepadMoveSensibility(): number {
             var gamepad = <FreeCameraGamepadInput>this.inputs.attached["gamepad"];
             if (gamepad)
                 return gamepad.gamepadMoveSensibility;
 
-            return null;
+            return 0;
         }
         
-        public set gamepadMoveSensibility(value) {
+        public set gamepadMoveSensibility(value: number) {
             var gamepad = <FreeCameraGamepadInput>this.inputs.attached["gamepad"];
             if (gamepad)
                 gamepad.gamepadMoveSensibility = value;

src/Collisions/babylon.collider.ts

@@ -72,7 +72,7 @@
         public initialPosition: Vector3;
         public nearestDistance: number;
         public intersectionPoint: Vector3;
-        public collidedMesh: AbstractMesh;
+        public collidedMesh: Nullable<AbstractMesh>;
 
         private _collisionPoint = Vector3.Zero();
         private _planeIntersectionPoint = Vector3.Zero();

src/Collisions/babylon.collisionCoordinator.ts

@@ -4,7 +4,7 @@ module BABYLON {
     export var CollisionWorker = "";
 
     export interface ICollisionCoordinator {
-        getNewPosition(position: Vector3, displacement: Vector3, collider: Collider, maximumRetry: number, excludedMesh: AbstractMesh, onNewPosition: (collisionIndex: number, newPosition: Vector3, collidedMesh?: AbstractMesh) => void, collisionIndex: number): void;
+        getNewPosition(position: Vector3, displacement: Vector3, collider: Collider, maximumRetry: number, excludedMesh: Nullable<AbstractMesh>, onNewPosition: (collisionIndex: number, newPosition: Vector3, collidedMesh: Nullable<AbstractMesh>) => void, collisionIndex: number): void;
         init(scene: Scene): void;
         destroy(): void;
 
@@ -21,7 +21,7 @@ module BABYLON {
         id: string;
         name: string;
         uniqueId: number;
-        geometryId: string;
+        geometryId: Nullable<string>;
         sphereCenter: Array<number>;
         sphereRadius: number;
         boxMinimum: Array<number>;
@@ -89,7 +89,7 @@ module BABYLON {
         collisionId: number;
         collider: SerializedColliderToWorker;
         maximumRetry: number;
-        excludedMeshUniqueId?: number;
+        excludedMeshUniqueId: Nullable<number>;
     }
 
     export interface UpdatePayload {
@@ -111,7 +111,7 @@ module BABYLON {
         private _scaledPosition = Vector3.Zero();
         private _scaledVelocity = Vector3.Zero();
 
-        private _collisionsCallbackArray: Array<(collisionIndex: number, newPosition: Vector3, collidedMesh?: AbstractMesh) => void>;
+        private _collisionsCallbackArray: Array<Nullable<(collisionIndex: number, newPosition: Vector3, collidedMesh: Nullable<AbstractMesh>) => void>>;
 
         private _init: boolean;
         private _runningUpdated: number;
@@ -154,7 +154,7 @@ module BABYLON {
                 });
             }
 
-            var geometryId: string = null;
+            var geometryId: Nullable<string> = null;
             if (mesh instanceof Mesh) {
                 geometryId = (<Mesh>mesh).geometry ? (<Mesh>mesh).geometry.id : null;
             } else if (mesh instanceof InstancedMesh) {
@@ -186,7 +186,7 @@ module BABYLON {
             }
         }
 
-        public getNewPosition(position: Vector3, displacement: Vector3, collider: Collider, maximumRetry: number, excludedMesh: AbstractMesh, onNewPosition: (collisionIndex: number, newPosition: Vector3, collidedMesh?: AbstractMesh) => void, collisionIndex: number): void {
+        public getNewPosition(position: Vector3, displacement: Vector3, collider: Collider, maximumRetry: number, excludedMesh: AbstractMesh, onNewPosition: (collisionIndex: number, newPosition: Vector3, collidedMesh: Nullable<AbstractMesh>) => void, collisionIndex: number): void {
             if (!this._init) return;
             if (this._collisionsCallbackArray[collisionIndex] || this._collisionsCallbackArray[collisionIndex + 100000]) return;
 
@@ -330,9 +330,18 @@ module BABYLON {
                     var returnPayload: CollisionReplyPayload = returnData.payload;
                     if (!this._collisionsCallbackArray[returnPayload.collisionId]) return;
 
-                    this._collisionsCallbackArray[returnPayload.collisionId](returnPayload.collisionId, Vector3.FromArray(returnPayload.newPosition), this._scene.getMeshByUniqueID(returnPayload.collidedMeshUniqueId));
+                    let callback = this._collisionsCallbackArray[returnPayload.collisionId];
+
+                    if (callback) {
+                        let mesh = this._scene.getMeshByUniqueID(returnPayload.collidedMeshUniqueId);
+
+                        if (mesh) {
+                            callback(returnPayload.collisionId, Vector3.FromArray(returnPayload.newPosition), mesh);
+                        }
+                    }
+                    
                     //cleanup
-                    this._collisionsCallbackArray[returnPayload.collisionId] = undefined;
+                    this._collisionsCallbackArray[returnPayload.collisionId] = null;
                     break;
             }
         }
@@ -347,7 +356,7 @@ module BABYLON {
 
         private _finalPosition = Vector3.Zero();
 
-        public getNewPosition(position: Vector3, displacement: Vector3, collider: Collider, maximumRetry: number, excludedMesh: AbstractMesh, onNewPosition: (collisionIndex: number, newPosition: Vector3, collidedMesh?: AbstractMesh) => void, collisionIndex: number): void {
+        public getNewPosition(position: Vector3, displacement: Vector3, collider: Collider, maximumRetry: number, excludedMesh: AbstractMesh, onNewPosition: (collisionIndex: number, newPosition: Vector3, collidedMesh: Nullable<AbstractMesh>) => void, collisionIndex: number): void {
             position.divideToRef(collider.radius, this._scaledPosition);
             displacement.divideToRef(collider.radius, this._scaledVelocity);
             collider.collidedMesh = null;
@@ -377,7 +386,7 @@ module BABYLON {
         public onGeometryUpdated(geometry: Geometry) { }
         public onGeometryDeleted(geometry: Geometry) { }
 
-        private _collideWithWorld(position: Vector3, velocity: Vector3, collider: Collider, maximumRetry: number, finalPosition: Vector3, excludedMesh: AbstractMesh = null): void {
+        private _collideWithWorld(position: Vector3, velocity: Vector3, collider: Collider, maximumRetry: number, finalPosition: Vector3, excludedMesh: Nullable<AbstractMesh> = null): void {
             var closeDistance = Engine.CollisionsEpsilon * 10.0;
 
             if (collider.retry >= maximumRetry) {

src/Collisions/babylon.collisionWorker.ts

@@ -51,7 +51,7 @@ module BABYLON {
 
         }
 
-        public collideWithWorld(position: Vector3, velocity: Vector3, maximumRetry: number, excludedMeshUniqueId?: number) {
+        public collideWithWorld(position: Vector3, velocity: Vector3, maximumRetry: number, excludedMeshUniqueId: Nullable<number>) {
 
             //TODO CollisionsEpsilon should be defined here and not in the engine.
             const closeDistance = 0.01; //is initializing here correct? A quick look - looks like it is fine.
@@ -192,7 +192,7 @@ module BABYLON {
                 error: WorkerReplyType.SUCCESS,
                 taskType: WorkerTaskType.INIT
             }
-            postMessage(reply, undefined);
+            postMessage(reply, "");
         }
 
         public onUpdate(payload: UpdatePayload) {
@@ -226,7 +226,7 @@ module BABYLON {
             }
 
 
-            postMessage(replay, undefined);
+            postMessage(replay, "");
         }
 
         public onCollision(payload: CollidePayload) {
@@ -247,7 +247,7 @@ module BABYLON {
                 taskType: WorkerTaskType.COLLIDE,
                 payload: replyPayload
             }
-            postMessage(reply, undefined);
+            postMessage(reply, "");
         }
     }
 

src/Collisions/babylon.pickingInfo.ts

@@ -10,16 +10,16 @@
     export class PickingInfo {
         public hit = false;
         public distance = 0;
-        public pickedPoint: Vector3 = null;
-        public pickedMesh: AbstractMesh = null;
+        public pickedPoint: Nullable<Vector3> = null;
+        public pickedMesh: Nullable<AbstractMesh> = null;
         public bu = 0;
         public bv = 0;
         public faceId = -1;
         public subMeshId = 0;
-        public pickedSprite: Sprite = null;
+        public pickedSprite: Nullable<Sprite> = null;
 
         // Methods
-        public getNormal(useWorldCoordinates = false, useVerticesNormals = true): Vector3 {
+        public getNormal(useWorldCoordinates = false, useVerticesNormals = true): Nullable<Vector3> {
             if (!this.pickedMesh || !this.pickedMesh.isVerticesDataPresent(VertexBuffer.NormalKind)) {
                 return null;
             }
@@ -59,7 +59,7 @@
             return BABYLON.Vector3.Normalize(result);
         }
 
-        public getTextureCoordinates(): Vector2 {
+        public getTextureCoordinates(): Nullable<Vector2> {
             if (!this.pickedMesh || !this.pickedMesh.isVerticesDataPresent(VertexBuffer.UVKind)) {
                 return null;
             }

src/Culling/babylon.ray.ts

@@ -129,7 +129,7 @@
             return temp <= rr;
         }
 
-        public intersectsTriangle(vertex0: Vector3, vertex1: Vector3, vertex2: Vector3): IntersectionInfo {
+        public intersectsTriangle(vertex0: Vector3, vertex1: Vector3, vertex2: Vector3): Nullable<IntersectionInfo> {
             if (!this._edge1) {
                 this._edge1 = Vector3.Zero();
                 this._edge2 = Vector3.Zero();
@@ -174,7 +174,7 @@
             return new IntersectionInfo(bu, bv, distance);
         }
 
-        public intersectsPlane(plane: Plane): number {
+        public intersectsPlane(plane: Plane): Nullable<number> {
             var distance: number;
             var result1 = Vector3.Dot(plane.normal, this.direction);
             if (Math.abs(result1) < 9.99999997475243E-07) {

src/Debug/babylon.axesViewer.ts

@@ -6,11 +6,11 @@
         private _yline = [Vector3.Zero(), Vector3.Zero()];
         private _zline = [Vector3.Zero(), Vector3.Zero()];
 
-        private _xmesh: LinesMesh;
-        private _ymesh: LinesMesh;
-        private _zmesh: LinesMesh;
+        private _xmesh: Nullable<LinesMesh>;
+        private _ymesh: Nullable<LinesMesh>;
+        private _zmesh: Nullable<LinesMesh>;
 
-        public scene: Scene;
+        public scene: Nullable<Scene>;
         public scaleLines = 1;
 
         constructor(scene: Scene, scaleLines = 1) {
@@ -40,48 +40,55 @@
 
             var scaleLines = this.scaleLines;
 
-            this._xmesh.position.copyFrom(position);
-            this._ymesh.position.copyFrom(position);
-            this._zmesh.position.copyFrom(position);
+            if (this._xmesh) {
+                this._xmesh.position.copyFrom(position);
+            }
+            if (this._ymesh) {
+                this._ymesh.position.copyFrom(position);
+            }
+            if (this._zmesh) {
+                this._zmesh.position.copyFrom(position);
+            }
 
             var point2 = this._xline[1];
             point2.x = xaxis.x * scaleLines;
             point2.y = xaxis.y * scaleLines;
             point2.z = xaxis.z * scaleLines;
-            Mesh.CreateLines(null, this._xline, null, null, this._xmesh);
+            Mesh.CreateLines("", this._xline, null, false, this._xmesh);
 
             point2 = this._yline[1];
             point2.x = yaxis.x * scaleLines;
             point2.y = yaxis.y * scaleLines;
             point2.z = yaxis.z * scaleLines;
-            Mesh.CreateLines(null, this._yline, null, null, this._ymesh);
+            Mesh.CreateLines("", this._yline, null, false, this._ymesh);
 
             point2 = this._zline[1];
             point2.x = zaxis.x * scaleLines;
             point2.y = zaxis.y * scaleLines;
             point2.z = zaxis.z * scaleLines;
-            Mesh.CreateLines(null, this._zline, null, null, this._zmesh);
+            Mesh.CreateLines("", this._zline, null, false, this._zmesh);
 
         }
 
         public dispose() {
 
-            if (this._xmesh) {
+            if (this._xmesh ) {
                 this._xmesh.dispose();
-                this._ymesh.dispose();
-                this._zmesh.dispose();
-
-                this._xmesh = null;
-                this._ymesh = null;
-                this._zmesh = null;
+            }
 
-                this._xline = null;
-                this._yline = null;
-                this._zline = null;
+            if (this._ymesh) {
+                this._ymesh.dispose();
+            }
 
-                this.scene = null;
+            if (this._zmesh) {
+                this._zmesh.dispose();
             }
 
+            this._xmesh = null;
+            this._ymesh = null;
+            this._zmesh = null;
+
+            this.scene = null;
         }
 
     }

src/Debug/babylon.boneAxesViewer.ts

@@ -2,8 +2,8 @@
 
     export class BoneAxesViewer extends Debug.AxesViewer {
 
-        public mesh:Mesh;
-        public bone:Bone;
+        public mesh: Nullable<Mesh>;
+        public bone: Nullable<Bone>;
 
         public pos = Vector3.Zero();
         public xaxis = Vector3.Zero();
@@ -21,6 +21,10 @@
 
         public update (): void {
 
+            if (!this.mesh || !this.bone) {
+                return;
+            }
+
             var bone = this.bone;
             bone.getAbsolutePositionToRef(this.mesh, this.pos);
             bone.getDirectionToRef(Axis.X, this.mesh, this.xaxis);
@@ -33,14 +37,7 @@
 
         public dispose() {
 
-            if(this.pos){
-
-                this.pos = null;
-
-                this.xaxis = null;
-                this.yaxis = null;
-                this.zaxis = null;
-
+            if (this.mesh){
                 this.mesh = null;
                 this.bone = null;
 

src/Debug/babylon.physicsViewer.ts

@@ -2,11 +2,11 @@
 
     export class PhysicsViewer {
         
-        protected _impostors:Array<PhysicsImpostor> = [];
-        protected _meshes:Array<AbstractMesh> = [];
-        protected _scene:Scene;
+        protected _impostors: Array<Nullable<PhysicsImpostor>> = [];
+        protected _meshes: Array<Nullable<AbstractMesh>> = [];
+        protected _scene: Nullable<Scene>;
         protected _numMeshes = 0;
-        protected _physicsEnginePlugin:IPhysicsEnginePlugin;
+        protected _physicsEnginePlugin: Nullable<IPhysicsEnginePlugin>;
         private _renderFunction: () => void;
 
         private _debugBoxMesh:Mesh;
@@ -14,27 +14,43 @@
         private _debugMaterial:StandardMaterial;
 
         constructor(scene:Scene){
-
             this._scene = scene || Engine.LastCreatedScene;
-            this._physicsEnginePlugin = this._scene.getPhysicsEngine().getPhysicsPlugin();
+            let physicEngine = this._scene.getPhysicsEngine();
 
+            if (physicEngine) {
+                this._physicsEnginePlugin = physicEngine.getPhysicsPlugin();
+            }
         }
 
-        protected _updateDebugMeshes():void{
+        protected _updateDebugMeshes(): void{
 
             var plugin = this._physicsEnginePlugin;
 
-            for (var i = 0; i < this._numMeshes; i++){
-                if(this._impostors[i].isDisposed){
+            for (var i = 0; i < this._numMeshes; i++) {
+                let impostor = this._impostors[i];
+
+                if (!impostor) {
+                    continue;
+                }
+
+                if (impostor.isDisposed) {
                     this.hideImpostor(this._impostors[i--]);
-                }else{
-                    plugin.syncMeshWithImpostor(this._meshes[i], this._impostors[i]);
+                } else {
+                    let mesh = this._meshes[i];
+
+                    if (mesh && plugin) {
+                        plugin.syncMeshWithImpostor(mesh, impostor);
+                    }
                 }
             }
 
         }
 
-        public showImpostor(impostor:PhysicsImpostor):void{
+        public showImpostor(impostor:PhysicsImpostor):void {
+
+            if (!this._scene) {
+                return;
+            }
 
             for (var i = 0; i < this._numMeshes; i++){
                 if(this._impostors[i] == impostor){
@@ -58,14 +74,24 @@
 
         }
 
-        public hideImpostor(impostor:PhysicsImpostor){
+        public hideImpostor(impostor: Nullable<PhysicsImpostor>){
+
+            if (!impostor || !this._scene) {
+                return;
+            }
 
             var removed = false;
 
             for (var i = 0; i < this._numMeshes; i++){
                 if(this._impostors[i] == impostor){
-                    this._scene.removeMesh(this._meshes[i]);
-                    this._meshes[i].dispose();
+                    let mesh = this._meshes[i];
+
+                    if (!mesh) {
+                        continue;
+                    }
+
+                    this._scene.removeMesh(mesh);
+                    mesh.dispose();
                     this._numMeshes--;
                     if(this._numMeshes > 0){
                         this._meshes[i] = this._meshes[this._numMeshes];
@@ -120,8 +146,8 @@
             return this._debugSphereMesh.createInstance('physicsBodyBoxViewInstance');
         }
 
-        private _getDebugMesh(impostor:PhysicsImpostor, scene:Scene):AbstractMesh{
-            var mesh:AbstractMesh;
+        private _getDebugMesh(impostor:PhysicsImpostor, scene:Scene): Nullable<AbstractMesh> {
+            var mesh: Nullable<AbstractMesh> = null;
             
             if (impostor.type == PhysicsImpostor.BoxImpostor) {
                 mesh = this._getDebugBoxMesh(scene);

src/Debug/babylon.rayHelper.ts

@@ -1,15 +1,15 @@
 module BABYLON {
     export class RayHelper {
         
-        public ray:Ray;
+        public ray: Nullable<Ray>;
 
         private _renderPoints: Vector3[];
-        private _renderLine: LinesMesh;
-        private _renderFunction: () => void;
-        private _scene: Scene;
+        private _renderLine: Nullable<LinesMesh>;
+        private _renderFunction: Nullable<() => void>;
+        private _scene: Nullable<Scene>;
         
-        private _updateToMeshFunction: () => void;
-        private _attachedToMesh: AbstractMesh;
+        private _updateToMeshFunction: Nullable<() => void>;
+        private _attachedToMesh: Nullable<AbstractMesh>;
         private _meshSpaceDirection: Vector3;
         private _meshSpaceOrigin: Vector3;
 
@@ -27,7 +27,7 @@ module BABYLON {
 
         public show(scene:Scene, color:Color3): void{
 
-            if(!this._renderFunction){
+            if(!this._renderFunction && this.ray){
 
                 var ray = this.ray;
 
@@ -36,11 +36,12 @@ module BABYLON {
                 this._renderPoints = [ray.origin, ray.origin.add(ray.direction.scale(ray.length))];
                 this._renderLine = Mesh.CreateLines("ray", this._renderPoints, scene, true);
 
-                this._scene.registerBeforeRender(this._renderFunction);
-
+                if (this._renderFunction) {
+                    this._scene.registerBeforeRender(this._renderFunction);
+                }
             }
 
-            if (color) {
+            if (color && this._renderLine) {
                 this._renderLine.color.copyFrom(color);
             }
 
@@ -48,13 +49,16 @@ module BABYLON {
 
         public hide(): void{
 
-            if(this._renderFunction){
+            if(this._renderFunction && this._scene){
                 this._scene.unregisterBeforeRender(this._renderFunction);
                 this._scene = null;
                 this._renderFunction = null;
-                this._renderLine.dispose();
-                this._renderLine = null;
-                this._renderPoints = null;
+                if (this._renderLine) {
+                    this._renderLine.dispose();
+                    this._renderLine = null;
+                }
+
+                this._renderPoints = [];
             }
 
         }
@@ -63,6 +67,10 @@ module BABYLON {
 
             var ray = this.ray;
 
+            if (!ray) {
+                return;
+            }
+
             var point = this._renderPoints[1];
             var len = Math.min(ray.length, 1000000);
             
@@ -80,6 +88,10 @@ module BABYLON {
 
             var ray = this.ray;
 
+            if (!ray) {
+                return;
+            }
+
             if(!ray.direction){
                 ray.direction = Vector3.Zero();
             }
@@ -110,7 +122,7 @@ module BABYLON {
             }
 
             if(!this._updateToMeshFunction){
-                this._updateToMeshFunction = this._updateToMesh.bind(this);
+                this._updateToMeshFunction = (<() => void>this._updateToMesh.bind(this));
                 this._attachedToMesh.getScene().registerBeforeRender(this._updateToMeshFunction);
             }
 
@@ -121,7 +133,9 @@ module BABYLON {
         public detachFromMesh(): void{
 
             if(this._attachedToMesh){
-                this._attachedToMesh.getScene().unregisterBeforeRender(this._updateToMeshFunction);
+                if (this._updateToMeshFunction) {
+                    this._attachedToMesh.getScene().unregisterBeforeRender(this._updateToMeshFunction);
+                }
                 this._attachedToMesh = null;
                 this._updateToMeshFunction = null;
             }
@@ -132,6 +146,10 @@ module BABYLON {
 
             var ray = this.ray;
 
+            if (!this._attachedToMesh || !ray) {
+                return;
+            }
+
             if(this._attachedToMesh._isDisposed){
                 this.detachFromMesh();
                 return;

src/Debug/babylon.skeletonViewer.ts

@@ -7,7 +7,7 @@
 
         private _scene: Scene;
         private _debugLines = new Array<Array<Vector3>>(); 
-        private _debugMesh: LinesMesh;
+        private _debugMesh: Nullable<LinesMesh>;
         private _isEnabled = false;
         private _renderFunction: () => void;
 
@@ -114,10 +114,10 @@
             }
 
             if (!this._debugMesh) {
-                this._debugMesh = BABYLON.MeshBuilder.CreateLineSystem(null, { lines: this._debugLines, updatable: true }, this._scene);
+                this._debugMesh = BABYLON.MeshBuilder.CreateLineSystem("", { lines: this._debugLines, updatable: true }, this._scene);
                 this._debugMesh.renderingGroupId = this.renderingGroupId;
             } else {
-                BABYLON.MeshBuilder.CreateLineSystem(null, { lines: this._debugLines, updatable: true, instance: this._debugMesh }, this._scene);
+                BABYLON.MeshBuilder.CreateLineSystem("", { lines: this._debugLines, updatable: true, instance: this._debugMesh }, this._scene);
             }
             this._debugMesh.position.copyFrom(this.mesh.position);
             this._debugMesh.color = this.color;

src/Mesh/babylon.mesh.ts

@@ -2534,7 +2534,7 @@
          * When updating an instance, remember that only point positions can change, not the number of points.      
          * The mesh can be set to updatable with the boolean parameter `updatable` (default false) if its internal geometry is supposed to change once created.  
          */
-        public static CreateLines(name: string, points: Vector3[], scene?: Scene, updatable?: boolean, instance?: LinesMesh): LinesMesh {
+        public static CreateLines(name: string, points: Vector3[], scene: Nullable<Scene> = null, updatable: boolean = false, instance: Nullable<LinesMesh> = null): LinesMesh {
             var options = {
                 points: points,
                 updatable: updatable,

src/Mesh/babylon.meshBuilder.ts

@@ -362,7 +362,7 @@
          * When updating an instance, remember that only line point positions can change, not the number of points, neither the number of lines.      
          * The mesh can be set to updatable with the boolean parameter `updatable` (default false) if its internal geometry is supposed to change once created.  
          */
-        public static CreateLineSystem(name: string, options: { lines: Vector3[][], updatable: boolean, instance?: LinesMesh }, scene: Scene): LinesMesh {
+        public static CreateLineSystem(name: string, options: { lines: Vector3[][], updatable: boolean, instance?: LinesMesh }, scene: Nullable<Scene>): LinesMesh {
             var instance = options.instance;
             var lines = options.lines;
 
@@ -400,7 +400,7 @@
          * When updating an instance, remember that only point positions can change, not the number of points.      
          * The mesh can be set to updatable with the boolean parameter `updatable` (default false) if its internal geometry is supposed to change once created.  
          */
-        public static CreateLines(name: string, options: { points: Vector3[], updatable?: boolean, instance?: LinesMesh }, scene: Scene): LinesMesh {
+        public static CreateLines(name: string, options: { points: Vector3[], updatable: boolean, instance: Nullable<LinesMesh> }, scene: Nullable<Scene> = null): LinesMesh {
             var lines = MeshBuilder.CreateLineSystem(name, { lines: [options.points], updatable: options.updatable, instance: options.instance }, scene);
             return lines;
         }

src/Tools/babylon.decorators.ts

@@ -112,7 +112,7 @@
         }
     }
 
-    function generateExpandMember(setCallback: string, targetKey: string) {
+    function generateExpandMember(setCallback: string, targetKey?: string) {
         return (target: any, propertyKey: string) => {
             var key = targetKey || ("_" + propertyKey);
             Object.defineProperty(target, propertyKey, {
@@ -238,7 +238,7 @@
             return serializationObject;
         }
 
-        public static Parse<T>(creationFunction: () => T, source: any, scene: Scene, rootUrl?: string): T {
+        public static Parse<T>(creationFunction: () => T, source: any, scene: Nullable<Scene>, rootUrl: string = ""): T {
             var destination = creationFunction();
 
             // Tags
@@ -261,7 +261,9 @@
                             dest[property] = sourceProperty;
                             break;
                         case 1:     // Texture
-                            dest[property] = Texture.Parse(sourceProperty, scene, rootUrl);
+                            if (scene) {
+                                dest[property] = Texture.Parse(sourceProperty, scene, rootUrl);
+                            }
                             break;
                         case 2:     // Color3
                             dest[property] = Color3.FromArray(sourceProperty);
@@ -276,7 +278,9 @@
                             dest[property] = Vector3.FromArray(sourceProperty);
                             break;
                         case 6:     // Mesh reference
-                            dest[property] = scene.getLastMeshByID(sourceProperty);
+                            if (scene) {
+                                dest[property] = scene.getLastMeshByID(sourceProperty);
+                            }
                             break;
                         case 7:     // Color Curves
                             dest[property] = ColorCurves.Parse(sourceProperty);

src/Tools/babylon.observable.ts

@@ -45,7 +45,7 @@
      * Represent an Observer registered to a given Observable object.
      */
     export class Observer<T> {
-        constructor(public callback: (eventData: T, eventState: EventState) => void, public mask: number, public scope: any = null) {
+        constructor(public callback: (eventData: Nullable<T>, eventState: EventState) => void, public mask: number, public scope: any = null) {
         }
     }
 
@@ -53,12 +53,14 @@
      * Represent a list of observers registered to multiple Observables object.
      */
     export class MultiObserver<T> {
-        private _observers: Observer<T>[];
-        private _observables: Observable<T>[];
+        private _observers: Nullable<Observer<T>[]>;
+        private _observables: Nullable<Observable<T>[]>;
         
         public dispose(): void {
-            for (var index = 0; index < this._observers.length; index++) {
-                this._observables[index].remove(this._observers[index]);
+            if (this._observers && this._observables) {
+                for (var index = 0; index < this._observers.length; index++) {
+                    this._observables[index].remove(this._observers[index]);
+                }
             }
 
             this._observers = null;
@@ -72,7 +74,10 @@
             result._observables = observables;            
 
             for (var observable of observables) {
-                result._observers.push(observable.add(callback, mask, false, scope));
+                let observer = observable.add(callback, mask, false, scope);
+                if (observer) {
+                    result._observers.push(observer);
+                }
             }
 
             return result;
@@ -91,12 +96,14 @@
 
         private _eventState: EventState;
 
-        private _onObserverAdded: (observer: Observer<T>) => void;
+        private _onObserverAdded: Nullable<(observer: Observer<T>) => void>;
 
         constructor(onObserverAdded?: (observer: Observer<T>) => void) {
             this._eventState = new EventState(0);
 
-            this._onObserverAdded = onObserverAdded;
+            if (onObserverAdded) {
+                this._onObserverAdded = onObserverAdded;
+            }
         }
 
         /**
@@ -106,7 +113,7 @@
          * @param insertFirst if true the callback will be inserted at the first position, hence executed before the others ones. If false (default behavior) the callback will be inserted at the last position, executed after all the others already present.
          * @param scope optional scope for the callback to be called from
          */
-        public add(callback: (eventData: T, eventState: EventState) => void, mask: number = -1, insertFirst = false, scope: any = null): Observer<T> {
+        public add(callback: (eventData: T, eventState: EventState) => void, mask: number = -1, insertFirst = false, scope: any = null): Nullable<Observer<T>> {
             if (!callback) {
                 return null;
             }
@@ -165,7 +172,7 @@
          * @param eventData
          * @param mask
          */
-        public notifyObservers(eventData: T, mask: number = -1, target?: any, currentTarget?: any): boolean {
+        public notifyObservers(eventData: Nullable<T>, mask: number = -1, target?: any, currentTarget?: any): boolean {
             let state = this._eventState;
             state.mask = mask;
             state.target = target;

src/tsconfig.json

@@ -9,7 +9,6 @@
     "lib": ["dom", "es2015.promise", "es5"],
     "noImplicitReturns": true,
     "noImplicitThis": true,
-    "noUnusedLocals": true,
-    "strictNullChecks": true
+    "noUnusedLocals": true
   }
 }