ALPSVR Camera Fly Rotation When Rolling / Tilting

Hello all,

I'm struggling, so hopefully someone with more experience can help me out.
I'm currently using ALPSVR & I have modified the ALPSNavigation Update code to get a simple forward movement on the head VR camera which works great.

Code (CSharp):

1.     /// <summary>
2.     /// Updates navigation state.
3.     /// </summary>
4.     public void FixedUpdate () {
5.  
6.         if (!moving){
7.             moving = true;
8.         }
9.  
10.         pitch = head.transform.eulerAngles.x;
11.         print ("Pitch : " + pitch);
12.      
13.         yaw = head.transform.eulerAngles.y;
14.         print ("Yaw : " + yaw);
15.  
16.         //roll += Input.GetAxis("Roll");
17.         roll += head.transform.eulerAngles.z;
18.         print ("Roll : " + roll);
19.  
20.         head.transform.Translate(Vector3.forward * Time.deltaTime * speed);
21.  
22.     }

What I want when flying, is to get the camera tilt/roll behaving as yawing in a certain limit, so that I won't need to rotate my body with the VR Homido Headset.

I suspect I need to modify or use the ALPSGyro class & use some quaternions in the ALPSNavigation code.

Just for info & if you also have been playing with the DK2, the idea I want to achieve is the same as found in "AirDrift DK2" simulation, where you can stay seated & fly in the map.

Thanks a lot for any help, I appreciate !