[SRanipal eye tracking C++ API does not reach 120 Hz sampling frequency(1.3.2.0 runtime and 1.3.3 SDK, win10 pro, i7-10700k, 3060ti)]

Hi @Bipul, you can download VIVE Eye and Facial Tracking SDK from this link(Latest (1.3.3.0) - Developer Resources (vive.com)), which contains the C++ sample code and documentation. 

[SRanipal eye tracking C++ API does not reach 120 Hz sampling frequency(1.3.2.0 runtime and 1.3.3 SDK, win10 pro, i7-10700k, 3060ti)]

It’s because I added this to get the system time and cause the problem:

error = ViveSR::anipal::Eye::SRanipal_GetSystemTime(&system_t);

 

Use the callback of C++ sample project provided by Vive can obtain 120Hz data... 

 

[SRanipal eye tracking C++ API does not reach 120 Hz sampling frequency(1.3.2.0 runtime and 1.3.3 SDK, win10 pro, i7-10700k, 3060ti)]

And another question, I want to collect the eye movement data of the participants while playing the VR game, which means that the eye data collection program needs to be run separately. Is C++ api the only way?

Sorry to disturb you, do you have any comments, @Corvus?

[SRanipal eye tracking C++ API does not reach 120 Hz sampling frequency(1.3.2.0 runtime and 1.3.3 SDK, win10 pro, i7-10700k, 3060ti)]

Hi everyone,

I can only get data of about 60Hz using c++ eye tracking API. I just used the callback of the C++ sample project and modified main.cpp.

The attached are the modified script  and one of data collected  by us.

Here are  software and hardware relevant details:

• 1.3.2.0 runtime and 1.3.3 SDK
•  win10 pro, CPU: i7-10700k, GPU: 3060ti

Looking forward to your reply, thanks!

 

Sub_testv_Time_1_2021_9_14_18_16.csv

[Eye Data report rate <120 Hz with C++ API]

On 2/24/2021 at 6:16 PM, Tony PH Lin said:

Hi @kaden,

Just revisit your issue, have you got the chance to try the latest 1.3.1.1 SDK and runtime or is the issue still existed on your side?

Thanks.

Hi ,

I have tried the 1.3.2.0 runtime and 1.3.3 SDK,  but still  got same results with kaden(~60Hz when executing callback)