Gaze origin bug in GetGazeRay of Unity package

[qxxxb 1]

Hi, there seems to be a bug in the `GetGazeRay` function of the SRanipal Unity package (specifically, the function at line 265 in SRanipal_Eye.cs).

origin = eyesData[(int)gazeIndex].gaze_origin_mm * 0.001f;
direction = eyesData[(int)gazeIndex].gaze_direction_normalized;
origin.x *= -1; // Adding this line fixes the bug
direction.x *= -1;

This issue has been mentioned in this post as well.

Here is a demo script to illustrate the bug: GazeRays.cs

This will render a blue ray from the left eye and a red ray from the right eye. Without the fix, the rays will appear swapped like so:

With the fix, the rays will appear in the correct eye like so:

If someone could confirm whether this bug is valid, I would appreciate it. Thanks!

[qxxxb 1]

Sorry to bump the topic, but if someone could evaluate the bug and see if the fix I mentioned resolves it, that's be great. Thanks!

[jboss 1]

The same bug applies to the combined gazeray. When I move my gaze to the left the ray goes to the right and vice versa. Up/down is fine.

If gaze_orgin_C is the measured combined origin and gaze_direct_C the measured combined direction you need to do the below calculation to use it:

fixed_gaze_origin_C = new Vector3(gaze_origin_C.x*-1f, gaze_origin_C.y, gaze_origin_C.z)/1000f,
fixed_gaze_direction_C = new Vector3(gaze_direct_C.x*-1f, gaze_direct_C.y, gaze_direct_C.z),

Note the division by 1000, as I'm using version 2 of the eyetracking API and there the measured values are in mm and Unity units are meters.

[Corvus 33]

@qxxxb @jboss Thanks for reporting this bug. The team will look into it.