For converting from raw_and_uncalibrated to standing.

OpenVR Frame of reference change with cnovr

	printf( "Conv: \n" );
	struct HmdMatrix34_t mzerotoabs = cnovrstate->oSystem->GetRawZeroPoseToStandingAbsoluteTrackingPose();
	printf( "%f %f %f %f\n", PFFOUR( mzerotoabs.m[0] ) );
	printf( "%f %f %f %f\n", PFFOUR( mzerotoabs.m[1] ) );
	printf( "%f %f %f %f\n", PFFOUR( mzerotoabs.m[2] ) );
	cnovr_pose pstanding;
	matrix44_to_pose( &pstanding, &mzerotoabs.m[0][0] );
	printf( "%f %f %f   %f %f %f %f   %f\n", PFTHREE( pstanding.Pos ), PFFOUR( pstanding.Rot ), pstanding.Scale );
	
	struct TrackedDevicePose_t poses[16];
	
	cnovrstate->oSystem->GetDeviceToAbsoluteTrackingPose( 
		//ETrackingUniverseOrigin_TrackingUniverseSeated = 0,
		ETrackingUniverseOrigin_TrackingUniverseStanding
		//ETrackingUniverseOrigin_TrackingUniverseRawAndUncalibrated
		, 0, poses, 16 );
	for( i = 0; i < 16; i++ )
	{
		struct TrackedDevicePose_t * t = poses + i;
		if( i == 0 && t->bPoseIsValid && t->bDeviceIsConnected )
		{
			printf( "STAND %d: \n", i );
			printf( "%f %f %f %f\n", PFFOUR( t->mDeviceToAbsoluteTracking.m[0] ) );
			printf( "%f %f %f %f\n", PFFOUR( t->mDeviceToAbsoluteTracking.m[1] ) );
			printf( "%f %f %f %f\n", PFFOUR( t->mDeviceToAbsoluteTracking.m[2] ) );
			cnovr_pose ps;
			matrix44_to_pose( &ps, &t->mDeviceToAbsoluteTracking.m[0][0] );
			printf( "%f %f %f   %f %f %f %f   %f\n", PFTHREE( ps.Pos ), PFFOUR( ps.Rot ), ps.Scale );
		}
	}
	
	cnovrstate->oSystem->GetDeviceToAbsoluteTrackingPose( 
		//ETrackingUniverseOrigin_TrackingUniverseSeated = 0,
		//ETrackingUniverseOrigin_TrackingUniverseStanding = 1,
		ETrackingUniverseOrigin_TrackingUniverseRawAndUncalibrated
		, 0, poses, 16 );
	for( i = 0; i < 16; i++ )
	{
		struct TrackedDevicePose_t * t = poses + i;
		if( i == 0 && t->bPoseIsValid && t->bDeviceIsConnected )
		{
			printf( "RAU %d: \n", i );
			printf( "%f %f %f %f\n", PFFOUR( t->mDeviceToAbsoluteTracking.m[0] ) );
			printf( "%f %f %f %f\n", PFFOUR( t->mDeviceToAbsoluteTracking.m[1] ) );
			printf( "%f %f %f %f\n", PFFOUR( t->mDeviceToAbsoluteTracking.m[2] ) );
			cnovr_pose ps;
			matrix44_to_pose( &ps, &t->mDeviceToAbsoluteTracking.m[0][0] );
			printf( "%f %f %f   %f %f %f %f   %f\n", PFTHREE( ps.Pos ), PFFOUR( ps.Rot ), ps.Scale );

			cnovr_pose pso;
			FLT fvo[16];
			apply_pose_to_pose( &pso, &pstanding, &ps );
			matrix34multiply( fvo, & mzerotoabs.m[0][0], &t->mDeviceToAbsoluteTracking.m[0][0] );
			printf( "RAU XF %d: \n", i );
			printf( "%f %f %f %f\n", PFFOUR(fvo ) );
			printf( "%f %f %f %f\n", PFFOUR(fvo+4 ) );
			printf( "%f %f %f %f\n", PFFOUR(fvo+8) );
			printf( "%f %f %f   %f %f %f %f   %f\n", PFTHREE( pso.Pos ), PFFOUR( pso.Rot ), pso.Scale );
		}
	}

Also,

 			apply_pose_to_point( pso.Pos, &pstanding, ps.Pos );
			printf( "%f %f %f \n", PFTHREE( pso.Pos ) );

at the end