Hi,

We deprecated rotational tracking with 8.5.8.

Announced that we will remove it in 8.3.8

Support for slot-in viewer type devices as well as Rotational Device Tracking has been deprecated and will be removed in a future version of Vuforia Engine. The following APIs have been deprecated:

EyewearCalibrationProfileManager

EyewearCalibrationReading

EyewearUserCalibrator

RotationalDeviceTracker

TransformModel

HeadTransformModel

HandheldTransformModel

ViewerParameters

CustomViewerParameters

ViewerParametersList, and different methods in

Device

EyewearDevice

RenderingPrimitives.

Info in 8.5.8 release notes:

Support for slot-in viewer type devices and Rotational Device Tracking have been removed. Please see the Vuforia SDK 8.3 release notes for more information about the API. If you need 3DOF tracking, you can now use the PositionalDeviceTracker and use only the rotation part of the pose. For any optical (or video) see-through stereo rendering application, you will now need to use third party integration that you can combine with device pose from the Vuforia API.

release notes: https://library.vuforia.com/articles/Release_Notes/Vuforia-SDK-Release-Notes

Thank you.

Vuforia Engine Support