Eye tracking on VIVE OpenXR with VIVE Pro Eye

[YujiKaneko]

Hello all,

I want to perform eye tracking with HTC VIVE Pro Eye, Windows 11, and VIVE OpenXR, but I don't know how to do it. I wrote the following Unity script, but it shows "No eye tracking device found".

public class EyeTracking : MonoBehaviour
{
    public Vector3 gazeDirection;
    private InputDevice eyeTrackingDevice;

    void Start()
    {
        List<InputDevice> devices = new List<InputDevice>();
        InputDevices.GetDevicesWithCharacteristics(InputDeviceCharacteristics.EyeTracking, devices);
        if (devices.Count > 0)
        {
            eyeTrackingDevice = devices[0];
        }
        else
        {
            Debug.LogError("No eye tracking device found");
        }
    }

    void Update()
    {
        gazeDirection = Vector3.zero;
        if (eyeTrackingDevice.isValid)
        {
            InputFeatureUsage<Vector3> eyeGazeDirectionUsage = new InputFeatureUsage<Vector3>("eyeGazeDirection");

            if (eyeTrackingDevice.TryGetFeatureValue(eyeGazeDirectionUsage, out Vector3 gazeDir))
            {
                gazeDirection = gazeDir;
            }
        }
    }
}

My settings are:

• Edit -> Project Settings -> XR Plug-in Management -> OpenXR enabled
• Edit -> Project Settings -> XR Plug-in Management -> OpenXR -> Interaction Profiles and added Eye Gaze Interaction Profile

Can anyone provide guidance on what might be wrong or missing in my setup?