Merge pull request #1360 from RaananW/resetRotationFix

Variable was not initialized, function didn't work.

src/Cameras/Inputs/babylon.freecamera.input.deviceorientation.ts

@@ -51,6 +51,9 @@ module BABYLON {
         }
 
         public checkInputs() {
+            //if no device orientation provided, don't update the rotation.
+            //Only testing against alpha under the assumption thatnorientation will never be so exact when set.
+            if(!this._alpha) return;
             Quaternion.RotationYawPitchRollToRef(BABYLON.Tools.ToRadians(this._alpha), BABYLON.Tools.ToRadians(this._beta), -BABYLON.Tools.ToRadians(this._gamma), this.camera.rotationQuaternion)
             this._camera.rotationQuaternion.multiplyInPlace(this._screenQuaternion);
             this._camera.rotationQuaternion.multiplyInPlace(this._constantTranform);

src/Cameras/babylon.deviceOrientationCamera.ts

@@ -7,6 +7,7 @@ module BABYLON {
 
         constructor(name: string, position: Vector3, scene: Scene) {
             super(name, position, scene);
+            this._quaternionCache = new Quaternion();
             this.inputs.addDeviceOrientation();
         }
 
@@ -16,18 +17,18 @@ module BABYLON {
 
         public _checkInputs(): void {
             super._checkInputs();
+            this._quaternionCache.copyFrom(this.rotationQuaternion);
             if (this._initialQuaternion) {
-                this._quaternionCache.copyFrom(this.rotationQuaternion);
                 this._initialQuaternion.multiplyToRef(this.rotationQuaternion, this.rotationQuaternion);
             }
         }
 
-        public resetToCurrentRotation(axis: BABYLON.Axis = BABYLON.Axis.Y) {
+        public resetToCurrentRotation(axis: Axis = 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();
+                this._initialQuaternion = new Quaternion();
             }
 
             this._initialQuaternion.copyFrom(this._quaternionCache || this.rotationQuaternion);
@@ -40,6 +41,8 @@ module BABYLON {
                 }
             });
             this._initialQuaternion.normalize();
+            //force rotation update
+            this._initialQuaternion.multiplyToRef(this.rotationQuaternion, this.rotationQuaternion);
         }
     }
 }