Hi @znadasdy can you kindly confirm exactly which SDK you are using?
The Unity SDK as designed for the HTC Vive has documentation which describes the various data types @ https://vr.tobii.com/sdk/develop/unity/documentation/api-reference/ such as:
GazeRay – a Unity Object containing 3 values of origin (3d vector for gaze point of origin), direction (3d vector describing gaze direction) and validity
But a number of the types you references are not aligned with this SDK, so further details would be very useful, thanks!