public bool GetWorkingStandingZeroPoseToRawTrackingPose(ref HmdMatrix34_t pmatStandingZeroPoseToRawTrackingPose)
	{
		bool result = FnTable.GetWorkingStandingZeroPoseToRawTrackingPose(ref pmatStandingZeroPoseToRawTrackingPose);
		return result;
	}

	public abstract bool GetLiveSeatedZeroPoseToRawTrackingPose(ref HmdMatrix34_t pmatSeatedZeroPoseToRawTrackingPose);

	public abstract EVROverlayError GetOverlayTransformTrackedDeviceRelative(ulong ulOverlayHandle,ref uint punTrackedDevice,ref HmdMatrix34_t pmatTrackedDeviceToOverlayTransform);

	public abstract void ApplyTransform(ref TrackedDevicePose_t pOutputPose,ref TrackedDevicePose_t pTrackedDevicePose,ref HmdMatrix34_t pTransform);

	public abstract bool GetWorkingStandingZeroPoseToRawTrackingPose(ref HmdMatrix34_t pmatStandingZeroPoseToRawTrackingPose);

	internal static extern void VR_IVRChaperoneSetup_SetWorkingStandingZeroPoseToRawTrackingPose(IntPtr instancePtr, ref HmdMatrix34_t pMatStandingZeroPoseToRawTrackingPose);

	internal static extern EVROverlayError VR_IVROverlay_GetOverlayTransformAbsolute(IntPtr instancePtr, ulong ulOverlayHandle, ref ETrackingUniverseOrigin peTrackingOrigin, ref HmdMatrix34_t pmatTrackingOriginToOverlayTransform);

	public void SetKeyboardTransformAbsolute(ETrackingUniverseOrigin eTrackingOrigin,ref HmdMatrix34_t pmatTrackingOriginToKeyboardTransform)
	{
		FnTable.SetKeyboardTransformAbsolute(eTrackingOrigin,ref pmatTrackingOriginToKeyboardTransform);
	}

 internal static extern bool VR_IVRChaperoneSetup_GetWorkingTagPoseByName(IntPtr instancePtr, string pchTagName, ref HmdMatrix34_t pmatTagPose, ref float pflScale);

	public EVROverlayError GetOverlayTransformTrackedDeviceRelative(ulong ulOverlayHandle,ref uint punTrackedDevice,ref HmdMatrix34_t pmatTrackedDeviceToOverlayTransform)
	{
		punTrackedDevice = 0;
		EVROverlayError result = FnTable.GetOverlayTransformTrackedDeviceRelative(ulOverlayHandle,ref punTrackedDevice,ref pmatTrackedDeviceToOverlayTransform);
		return result;
	}

	public EVROverlayError GetTransformForOverlayCoordinates(ulong ulOverlayHandle,ETrackingUniverseOrigin eTrackingOrigin,HmdVector2_t coordinatesInOverlay,ref HmdMatrix34_t pmatTransform)
	{
		EVROverlayError result = FnTable.GetTransformForOverlayCoordinates(ulOverlayHandle,eTrackingOrigin,coordinatesInOverlay,ref pmatTransform);
		return result;
	}

	public EVROverlayError GetOverlayTransformAbsolute(ulong ulOverlayHandle,ref ETrackingUniverseOrigin peTrackingOrigin,ref HmdMatrix34_t pmatTrackingOriginToOverlayTransform)
	{
		EVROverlayError result = FnTable.GetOverlayTransformAbsolute(ulOverlayHandle,ref peTrackingOrigin,ref pmatTrackingOriginToOverlayTransform);
		return result;
	}

	public bool GetLiveSeatedZeroPoseToRawTrackingPose(ref HmdMatrix34_t pmatSeatedZeroPoseToRawTrackingPose)
	{
		bool result = FnTable.GetLiveSeatedZeroPoseToRawTrackingPose(ref pmatSeatedZeroPoseToRawTrackingPose);
		return result;
	}

	public void SetWorkingStandingZeroPoseToRawTrackingPose(ref HmdMatrix34_t pMatStandingZeroPoseToRawTrackingPose)
	{
		FnTable.SetWorkingStandingZeroPoseToRawTrackingPose(ref pMatStandingZeroPoseToRawTrackingPose);
	}

	public override EVROverlayError GetOverlayTransformAbsolute(ulong ulOverlayHandle,ref ETrackingUniverseOrigin peTrackingOrigin,ref HmdMatrix34_t pmatTrackingOriginToOverlayTransform)
	{
		CheckIfUsable();
		EVROverlayError result = VRNativeEntrypoints.VR_IVROverlay_GetOverlayTransformAbsolute(m_pVROverlay,ulOverlayHandle,ref peTrackingOrigin,ref pmatTrackingOriginToOverlayTransform);
		return result;
	}

        public RigidTransform(HmdMatrix34_t pose)
        {
            var m = Matrix4x4.identity;

            m[0, 0] = pose.m0;
            m[0, 1] = pose.m1;
            m[0, 2] = -pose.m2;
            m[0, 3] = pose.m3;

            m[1, 0] = pose.m4;
            m[1, 1] = pose.m5;
            m[1, 2] = -pose.m6;
            m[1, 3] = pose.m7;

            m[2, 0] = -pose.m8;
            m[2, 1] = -pose.m9;
            m[2, 2] = pose.m10;
            m[2, 3] = -pose.m11;

            this.pos = m.GetPosition();
            this.rot = m.GetRotation();
        }

        public HmdMatrix34_t ToHmdMatrix34()
        {
            var m = Matrix4x4.TRS(pos, rot, Vector3.one);
            var pose = new HmdMatrix34_t();

            pose.m0 = m[0, 0];
            pose.m1 = m[0, 1];
            pose.m2 = -m[0, 2];
            pose.m3 = m[0, 3];

            pose.m4 = m[1, 0];
            pose.m5 = m[1, 1];
            pose.m6 = -m[1, 2];
            pose.m7 = m[1, 3];

            pose.m8 = -m[2, 0];
            pose.m9 = -m[2, 1];
            pose.m10 = m[2, 2];
            pose.m11 = -m[2, 3];

            return pose;
        }

	internal static extern bool VR_IVRChaperoneSetup_GetLiveSeatedZeroPoseToRawTrackingPose(IntPtr instancePtr, ref HmdMatrix34_t pmatSeatedZeroPoseToRawTrackingPose);

internal static extern bool SteamAPI_vr_IHmd_GetTrackerFromHeadPose(IntPtr instancePtr, float fPredictedSecondsFromNow, ref HmdMatrix34_t pmPose, ref HmdTrackingResult peResult);

	internal static extern EVROverlayError VR_IVROverlay_GetOverlayTransformTrackedDeviceRelative(IntPtr instancePtr, ulong ulOverlayHandle, ref uint punTrackedDevice, ref HmdMatrix34_t pmatTrackedDeviceToOverlayTransform);