Getting Pupil Diameter From Vive XR Elite (Unity)

[Thxkew]

Hi everyone, I am looking for a possible way to get pupil diameter information from Vive XR Elite in Unity for my research.

I used to get such information from HTC Vive Pro Eye using SRanipal. However, It seems SRanipal does not support Vive XR Elite for getting eye-tracking data. Is it correct?

Is there any possible way to get eye-tracking data, especially pupil diameter information from Vive XR Elite?

Thank you in advance.

[JonathonHart]

I am having the exact same issue as Thxkew. I also need to get data including pupil data from the Vive XR Elite one way or another.

[YVORI]

We have the same issue as well.

We purchased the XR Elite only because it can track pupil diameter with the full face tracker module.

How do we access the data from Unity (when streaming)...

 

If you find a solution please let me know @JonathonHart and @Thxkew.

Would be very nice if someone from Vive answered.

[YVORI]

If you check here: https://docs.vrcft.io/docs/hardware/VIVE/sranipal

 

It does say that SRanipal version 1.3.6.8 supports the XR Elite.

I will look further into that and maybe get back here for anybody else looking for an answer.

[VIVE_chengnay]

Hi @YVORI,

You can access data through streaming by using SR runtime,

but I was told that not all data from XR Elite mapping to SR runtime.

And, is your content running on XR Elite or PC?

[YVORI]

@VIVE_chengnay I just tried yesterday and while I could access pretty much everything else, trying to get pupil dilation always returned a 0 for me.

Is there any way to get Pupil Dilation through wireless streaming on a PC?

Is the LivePreview thing an option?

Any help would be much appreciated.

[VIVE_chengnay]

Hi @YVORI,

I was told that pupil diameter is not mapping to SR runtime.

You're developing AIO or PCVR content?

[YVORI]

Hi @VIVE_chengnay,

we are developing for PCVR.

Is there any way for PCVR to access the pupil dilation.

Even if its a hacky work-around it could solve our issues.

[VIVE_chengnay]

I will check internally and get back to you later.

[YVORI]

Thanks @VIVE_chengnay for looking into it for us.

If no solution is available, do you think it would be possible to code a custom solution for this?

Something like an App running a Background Service on the XR Elite to send the Pupil Size to a Unity App running on a PC, which is connected to the same Wifi Network?

Since I am a noob in mobile development, I would try using libraries like this:

https://github.com/nintendaii/unity-background-service