Jerky tracking in Unity 2021, and 2022

[Mandelbrow]

The VR tracking is pretty useless when building the project for Android with Unity 2021.3.30, or 2022.3.7.
The tracking was much smoother when the app was built with Unity 2020.3.46.

In Unity 2021, and 2022 everything vibrates when the head is moved. It looks like some "smoothing algorithm" constantly overshoots, and then compensates back in every second frame. It looks horrible, and this type of error is scaled up by a huge factor when shown in a vr headset.

Is it a bug in Unity, or isn't the SDK tested with Unity versions later than 2020?

Video Clips to see the problem (choose highest quality in Youtube):
SDK_1.21.0_Unity2022.3.7-jerky-tracking.mp4
SDK_1.21.0_Unity2020.3.46-smoother.mp4

[julien-tamade]

maybe it's related to this PR?
#212

[Mandelbrow]

@julien-tamade The horrible vibration is still there when the camera is rotated with the Tracked Pose Driver disabled. So I believe it's not from wrong gyro timing. There are something else going on from when the vr view is rendered, to when it is visible on the display.

The view still vibrates when rotating the camera, after ExitVR () is called from the back button, if watched through a headset.

[arilow]

Thank Mandelbrow for reporting this!

Unfortunately we haven’t been able to repro this issue on Unity2022.3.7-. From your last comment, I understand that you are able to repro the jerky tracking also after ExitVR is called. It is worth mentioning that ExitVR disable the Cardboard XR Plugin as you can see here. Is this accurate?

On the other hand, in order to help us reproducing this, please provide the information below:

• What device are you using?
• Are you able to repro this same issue with another device?
• Could you please provide us with apks for the videos shared above?

Thanks!

[Mandelbrow]

It's a Sony Xperia 5 from 2020 running Android 11.
Haven't tested other devices.

HelloCardboard_SDK_1.21.0_Unity_2022.3.7-vibrates.apk.zip
HelloCardboard_SDK_1.21.0_Unity_2020.3.46-OK.apk.zip

[petervanapeldoorn]

Hi, Did you manage to solve this problem? As we seem to have the same issue..

[Mandelbrow]

@petervanapeldoorn So far haven't found any solution other than staying in Unity 2020.