[ViveSR_Sample problem: black screen and white square]

What SRWorks/Unity version you use?  

What HMD you use, ie. Vive Pro or Cosmos?

[pupil_position_in_sensor_area]

There is no direct angle mapping between pupil position in sensor and gaze vector.

Pupil position in sensor is mainly used for positioning HMD up/down/left/right and IPD adjustment in calibration process to make user's eyes in correct position, i.e.: make pupil in the center of sensor.

Have discussed in another thread.

[AR triggers]

There are some scenarios demoed here, https://www.youtube.com/channel/UCJB908lgXo17rkb21G_qBZQ.

[Vive Cosmos Elite and Lighthouses 2.0 ?]

It is same as Comos but Elite would not work with SRWorks.

[SteamVR GetPoseActionData error on Unity demos]

SRWorks Experience demo needs SteamVR, mainly for controller usage.

I did the following steps with Unity 2019.3.1.f1/SRWorks 0.9.0.3 and it works.

Step 1: import Vive-SRWorks-Unity-Plugin.unitypackage

Step 2: restart Unity

Step 3: Import SteamVR from Unity asset store

Step 4: import Vive-SRWorks-Unity-Experience.unitypackage

Step 5: open scene Demo.Unity

Step 6: Play

[Coordinate of gaze origin and direction]

Yes, you did.

Here is an illustration may offer clearer explanation, https://math.stackexchange.com/questions/2247039/angles-of-a-known-3d-vector

[SRanipal with UE4]

You could download SRanipal Runtime and SDK from here, https://developer.vive.com/resources/knowledgebase/vive-sranipal-sdk/ After install VIVE_SRanipalInstaller_1.1.2.0.msi, you could refer to UE sample enclosed in SRanipal_SDK_1.1.0.1.zip

[Coordinate of gaze origin and direction]

There is no direct angle mapping between pupil position in sensor and gaze vector.

Pupil position in sensor is mainly used for positioning HMD up/down/left/right in calibration process to make user's eyes in correct position, i.e.: make pupil in the center of sensor.

 

[SteamVR GetPoseActionData error on Unity demos]

May know what HMD, Cosmos/Vive Pro,  you use? which SRWorks and Unity version?

Does the pre-built demo work?

[[SRWorks C lib 0.9.0.3] ViveSR_GetVersion() seems returning wrong value "0.0.0.1"]

Thanks for the feedback. we will check it.

[Eye tracker calibration no response]

Has it succeeded before or it always fails? 

[SRanipal with UE4]

You could download SRanipal SDK here, ttps://developer.vive.com/resources/knowledgebase/vive-sranipal-sdk/, which encloses Unreal sample.

[Are the combined eye data avaiable in Unity?]

Convergence Distance is not supported so convergence_distance_validity returns false, i.e. the value of convergence_distance_mm is not meaningful. 

However, CombinedEyeData.eye_data is supported. Generally, could check eye_data_validata_bit_mask to determine if the corresponding data is meaningful at calling time.

 

[Coordinate of gaze origin and direction]

Sorry, the previous description is not clear enough. The vector magnitude of x, y, z is in range [0,1] and with a direction represented in +/-.

Why you use pupil position, typically it is used for positioning HMD.?

 

 

[Confused by VerboseData: left, right, combined]

"SingleEyeData eye_data" inside the CombinedEyeData is valid though convergence_distance is invalid.

The "combined" gaze is described as the figure below. Suggest to use "combined" gaze to determine what you are looking at.

[Coordinate of gaze origin and direction]

On 2/25/2020 at 1:37 AM, Somnath said:

Can you please explain how are you exactly finding the gaze point from gaze origin and gaze direction as gaze direction is normalized vector. Do we need to unnormalize it, if yes then how shall i do this ?

Are u using Unity? If so, you could take a look at EyeFocusSample enclosed in Unity Plugin

[About experience sample guidline]

You may refer to the guide enclosed in Sample Code Project: Experience Demo (Unity Code) for v0.8.0.2 here first, https://developer.vive.com/resources/knowledgebase/download-vive-srworks-sdk-0-8-0-2-demo-unity-code-early-access/, although it is a little out of date. We will update it in the next version soon.

 

[Coordinate of gaze origin and direction]

• The coordinate system is with respect to the system origin as the figure below.
• "normalized" means x, y, z of gaze vector is in the 0~1, i.e. a unit vector in Cartesian coordinate.
• Regarding the normalized pupil position, (0, 0) is the top left of sensor area and (1, 1): is the bottom right of sensor area,

 

 

[Pupil dilation in mm vs. eye openess parameter]

Have you tested SINGLE_EYE_DATA_EYE_OPENNESS_VALIDITY before retrieve openness value?

 

@kbombeke

[error when building sample_7 out]

In Unity 2018 or 2019, please set the following player setting:

Project settings > Player > Other settings > Configuration > Api Compatibility Level: .NET 4.x as the below figure.

[error when building sample_7 out]

only sample_7? what SRWorks and Unity version you use?

@Vive

[Access camera resources to openCV]

Could the Unity pre-built demo program run on your PC?

 

@もりぞぅ

[SDK C Samples (9.0.3) not displaying any images from cameras]

Could you provide the logs existing in this folder, $(drive)\Users\$(name)\AppData\LocalLow\HTC Corporation\SR_Logs

[SDK C Samples (9.0.3) not displaying any images from cameras]

What device you are using? 

[Vive Cosmos can't use SRWorks?]

Yes, here is download site, https://developer.vive.com/resources/knowledgebase/vive-srworks-sdk/

@forestluch