Allow combined camera to impersonate sub types

Author: vidartf

js/scripts/three-class-config.js

@@ -161,6 +161,7 @@ module.exports = {
             height:     new Types.Float(),
 
             mode:       new Types.Enum("['perspective', 'orthographic']", 'perspective'),
+            impersonate:new Types.Bool(true),
             // view: new Types.ViewOffset()
         },
         constructorArgs: [ 'width', 'height', 'fov', 'near', 'far', 'orthoNear', 'orthoFar' ],

js/src/cameras/CombinedCamera.js

@@ -28,6 +28,8 @@ var CombinedCameraModel = CombinedCameraAutogen.extend({
             this.convertFloatModelToThree(this.get('orthoNear'), 'orthoNear'),
             this.convertFloatModelToThree(this.get('orthoFar'), 'orthoFar')
         );
+        result.impersonate = this.convertBoolModelToThree(
+            this.get('impersonate'), 'impersonate');
         return Promise.resolve(result);
 
     },

js/src/examples/cameras/CombinedCamera.js

@@ -37,13 +37,37 @@ var CombinedCamera = function ( width, height, fov, near, far, orthoNear, orthoF
 	this.cameraO = new THREE.OrthographicCamera( width / - 2, width / 2, height / 2, height / - 2, 	orthoNear, orthoFar );
 	this.cameraP = new THREE.PerspectiveCamera( fov, width / height, near, far );
 
+	this.impersonate = true;
+
 	this.toPerspective();
 
 };
 
 CombinedCamera.prototype = Object.create( THREE.Camera.prototype );
 CombinedCamera.prototype.constructor = CombinedCamera;
 
+Object.defineProperties( CombinedCamera.prototype, {
+
+	isPerspectiveCamera: {
+		get: function () {
+			if (!this.impersonate) {
+				return undefined;
+			}
+			return this.inPerspectiveMode;
+		}
+	},
+
+	isOrthographicCamera: {
+		get: function () {
+			if (!this.impersonate) {
+				return undefined;
+			}
+			return this.inOrthographicMode;
+		}
+	}
+
+} );
+
 CombinedCamera.prototype.toPerspective = function () {
 
 	// Switches to the Perspective Camera