eye tracking Do we get 120 Hz of Eye Tracking frequency with SRAnipal?

[prajaktakhandve]

Hello Forum,

We are a group of students using HTC Vive Pro eye for Eye Tracking as part of our academic project. We need to get the eye tracking data at its maximum capture frequency, having tried the following methods we still fail to capture data at 120Hz,

1. We tried to set the Application.targetFrameRate to more than the default targetFrameRate but it did not work as the number of records did not change. We added it to the start function as in the link below: https://docs.unity3d.com/ScriptReference/Application-targetFrameRate.html

2. We tried implementing threads as mentioned in this link: https://forum.vive.com/topic/5897-getting-verbosedata-at-the-fastest-rate-possible/page/2/ . But Unity froze and the application stopped working. There are two codes, one Sample_MainThread.cs creates a new thread which creates an object of type Sample_GetDataThread.cs to get the data. There was a solution to add counter to the while loop which is in the class "Sample_GetDataThread.cs" to keep a counter and avoid unity from freezing.

3. Currently, we are using EyeDataCallback version 2 in SRanipal. We get data at 30-80 records per second and it varies.

Please could someone suggest if this can be done and if yes how do we achieve it?

Help will be much appreciated, Thank you!

[Tony PH Lin]

Hi @prajaktakhandve,

We've received other feedbacks not to reach 120Hz frequency.

May I know what's the SRanipal version you start to meet this issue?

From 1.3.0.9 or even earlier like 1.1.0.1 or others?

Thanks.

[apellisscot]

Hi @prajaktakhandve,

Do you have any updates on this?
I was not able to reach 120 Hz. But could be based on the HW specs. I posted my issues here.

[Corvus]

@apellisscot   @prajaktakhandve