Function ovr_GetTrackerPose

ReviveXR/REV_CAPI.cpp:445–487

}

OVR_PUBLIC_FUNCTION(ovrTrackerPose) ovr_GetTrackerPose(ovrSession session, unsigned int trackerPoseIndex)
{
	REV_TRACE(ovr_GetTrackerPose);

	ovrTrackerPose tracker = { 0 };

	if (!session)
		return tracker;

	if (trackerPoseIndex < ovr_GetTrackerCount(session))
	{
		const OVR::Posef poses[] = {
			OVR::Posef(OVR::Quatf(OVR::Axis_Y, OVR::DegreeToRad(90.0f)), OVR::Vector3f(-2.0f, 0.0f, 0.2f)),
			OVR::Posef(OVR::Quatf(OVR::Axis_Y, OVR::DegreeToRad(0.0f)), OVR::Vector3f(-0.2f, 0.0f, -2.0f)),
			OVR::Posef(OVR::Quatf(OVR::Axis_Y, OVR::DegreeToRad(180.0f)), OVR::Vector3f(0.2f, 0.0f, 2.0f))
		};
		OVR::Posef trackerPose = poses[trackerPoseIndex];

		std::shared_lock<std::shared_mutex> lk(session->TrackingMutex);
		XrSpaceLocation relation = XR_TYPE(SPACE_LOCATION);
		if (session->Session && XR_SUCCEEDED(xrLocateSpace(session->ViewSpace, session->TrackingSpaces[ovrTrackingOrigin_EyeLevel],
			(*session->CurrentFrame).predictedDisplayTime, &relation)))
		{
			// Create a leveled head pose
			if (relation.locationFlags & XR_SPACE_LOCATION_ORIENTATION_VALID_BIT)
			{
				float yaw;
				XR::Posef headPose(relation.pose);
				headPose.Rotation.GetYawPitchRoll(&yaw, nullptr, nullptr);
				headPose.Rotation = OVR::Quatf(OVR::Axis_Y, yaw);

				// Rotate the trackers with the headset so that the headset is always in view
				trackerPose = headPose * trackerPose;
			}
		}

		tracker.Pose = trackerPose;
		tracker.LeveledPose = trackerPose;
		tracker.TrackerFlags = ovrTracker_Connected | ovrTracker_PoseTracked;
	}

	return tracker;
}

// Pre-1.7 input state
typedef struct ovrInputState1_