eye tracking Getting Screen Position of the Gaze in Unity

[AdamStreck 1]

Update - Unity has reproduced the issue on their end and flagged a bug: https://issuetracker.unity3d.com/issues/xr-sdk-cameraworldtoscreenpoint-returns-offset-coordinates

[Corvus 37]

@AdamStreck Thanks for sharing the update!

[neomimiz 1]

 

Hi,

I have recently started working with unity and Sranipal.  I have tried to follow the steps described in the recent posts here but still have a few questions related to the conversion between gaze direction screen and world coordinates...

1. In what way gaze direction is related to the screen coordinates in unity? is this the correct conversion to pixels?

  Left_E_gaze_direction_normalized = verboseData.left.gaze_direction_normalized;

x_pix_resolution=1440;  y_pix_resolution=1600;

 left_eye_x_pixels = Left_E_gaze_direction_normalized.x / x_pix_resolution;
  left_eye_z_pixels = Left_E_gaze_direction_normalized.z / y_pix_resolution;

2. Conversion to world coordinates:

Left_eye_position_world_coordinates= Camera.ScreenToWorldPoint( left_eye_x_pixels, left_eye_z_pixels, left_eye_y_pixels);

3. In what way gaze origin is related to these transformations? /or if it isn't why is it provided? 

I would greatly appreciate your help:)

Neomi

 

 

 

 

[scyudits 0]

I am also interested in the answers to the above post by @neomimiz