pub unsafe extern "C" fn qtmComputeHeadTiltAngle(
data: *const QtmTrackingData,
) -> f32Expand description
Computes the user’s head tilt angle, that is, the angle between the line through both eyes and the camera’s horizontal axis in camera space.
§Arguments
data- Eye tracking data, obtained from QTMU_GetTrackingData or QTMU_GetTrackingDataEx.
§Returns
Horizontal head angle relative to camera, in radians.