Big fixes

Rotation was supposed to be inverted. Now works as expected.

src/Cameras/babylon.deviceOrientationCamera.ts

@@ -3,6 +3,7 @@ module BABYLON {
     export class DeviceOrientationCamera extends FreeCamera {
 
         private _initialQuaternion: Quaternion;
+        private _quaternionCache: Quaternion;
 
         constructor(name: string, position: Vector3, scene: Scene) {
             super(name, position, scene);
@@ -15,24 +16,27 @@ module BABYLON {
 
         public _checkInputs(): void {
             super._checkInputs();
-            if(this._initialQuaternion) {
+            if (this._initialQuaternion) {
+                this._quaternionCache.copyFrom(this.rotationQuaternion);
                 this._initialQuaternion.multiplyToRef(this.rotationQuaternion, this.rotationQuaternion);
             }
         }
 
-        public resetToCurrentRotation(axis: BABYLON.Vector3 = BABYLON.Axis.Y) {
+        public resetToCurrentRotation(axis: BABYLON.Axis = BABYLON.Axis.Y) {
             //can only work if this camera has a rotation quaternion already.
             if (!this.rotationQuaternion) return;
 
             if (!this._initialQuaternion) {
                 this._initialQuaternion = new BABYLON.Quaternion();
-            } else {
-                this._initialQuaternion.copyFrom(this.rotationQuaternion);
             }
 
-            ['x', 'y', 'z'].forEach(function (axisName) {
+            this._initialQuaternion.copyFrom(this._quaternionCache || this.rotationQuaternion);
+
+            ['x', 'y', 'z'].forEach((axisName) => {
                 if (!axis[axisName]) {
                     this._initialQuaternion[axisName] = 0;
+                } else {
+                    this._initialQuaternion[axisName] *= -1;
                 }
             });
             this._initialQuaternion.normalize();