How to get an movement of pupils in real worls's distance unit or angle unit by VIVE Pro Eye?

[xrini]

I need some help.

I need to get?an movement of pupils in real worls's distance unit(mm/inch) or angle unit(degree) using Vive pro eye.

 

So, I check the SRanipal SDK Doxygen file and find the description about GetPupilPostion API.

 

But I have a problem.

In Doxygen, pupil position is printed by (x,y)?coordinate.

 

However, I need to caculate the variation about pupil position by real unit(cm, mm, inch).?

 

How can I get It?

 

In other words, I'd like to know if 1, -1 in the?GetPupilPosition() is relative offset or absoulte offset by each person.

 

(   - tag added by moderator)

[Daniel_Y]

Refering to this thread, https://community.viveport.com/t5/Vive-SRanipal-SDK/Vive-Pro-Eye-Finding-a-single-eye-origin-in-world-space/m-p/31592#M10.