rotationQuaternion different depending on camera type (UniviersalCamera vs. DeviceOrientationCamera vs. WebVRCamera)

Questions
1

I’m trying to sync up two cameras on two different devices. The goal is to read the rotation quaternion from camera A on computer A, send it to computer B via webRTC, and then rotate camera B so it’s facing the same direction. Camera B (the receiving camera) is always a standard UniversalCamera.

When camera A (the sending camera) is also a UniversalCamera, this works great.

But when camera A is a DeviceOrientationCamera on my phone (per the WebVR experience helper), camera B does not match camera A’s angle.

Similarly, when camera A is a WebVR camera (HTC Vive), the angles also do not match.

To get camera A’s quaternion, I always use scene.activeCamera.rotationQuaternion, regardless of the type of camera. (Perhaps that’s my mistake?)

To set camera B’s angle (always a UniversalCamera), I use scene.activeCamera.rotationQuaternion = {QUAT from camera A}

Am I missing something obvious? It would be great to be able to sync cameras this way for an educational app I’m developing.

As always, much thanks for your help!

2

Not sure I can help other than giving your question a bump. Perhaps other parameters for the two cameras do not match. It might be worth checking.
UniversalCamera - Babylon.js Documentation
DeviceOrientationCamera - Babylon.js Documentation

3

This is because DeviceorientationCamera or WebVRCamera have initial rotations that are added to the rotationQuaternion property.

4

As always, thanks for your quick response! I really appreciate it. All the best.