Gaze Tracking On UI WorldSpace in Unity

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Hi everyone,

 

I am trying to make a simple UI Interface where I have a small cursor follow the user's gaze on a World Canvas following the camera, but I am having some trouble pinning down the exact coordinates / directions to do this. I am using the following to obtain both origin and direction of combined eye gaze:

verbose_data.combined.eye_data.gaze_origin_mm * 0.001f;

verbose_data.combined.eye_data.gaze_direction_normalized;

 

For other purposes I am also recording at the full 120Hz offered by the Tobii tracker, so ideally I would like to work at the same sampling rate (but I will smooth the position every game frame).

 

Do I need to make some sort of conversion from the verbose_data structure? I am currently lost on how to solve this, any help would be greatly appreciated!