private void SetupCameraUpdateCallback(EyeType type)
{
var eyeCamera = _eyeCamera[type];
var eyeTransform = _eyeTransform[type];
var homographyMaterial = _eyeCamMaterial[type];
Action <Camera> updateState = (camera) =>
{
_faceTracker.GetCurrentFacePose(out _currentFacePose);
var eyePose = _currentFacePose.GetEyePose(type);
eyeTransform.SetPositionAndRotation(eyePose.position, eyePose.rotation);
_faceTracker.GetCurrentProjMatrices(eyeCamera.nearClipPlane, eyeCamera.farClipPlane,
out _currentProjMatrices);
var projMat = _currentProjMatrices.GetProjectionMatrix(type);
if (!SRDHelper.HasNanOrInf(projMat))
{
eyeCamera.ResetProjectionMatrix();
eyeCamera.fieldOfView = CalcVerticalFoVFromProjectionMatrix(projMat);
eyeCamera.aspect = CalcAspectWperHFromProjectionMatrix(projMat);
eyeCamera.projectionMatrix = projMat;
if (_isBoxFrontClippingCache)
{
var nearClipPlaneTF = _srdManager.DisplayEdges.LeftBottom;
eyeCamera.projectionMatrix = CalcObliquedNearClipProjectionMatrix(eyeCamera, nearClipPlaneTF.forward,
nearClipPlaneTF.position + nearClipPlaneTF.forward * ObliquedNearClipOffset * nearClipPlaneTF.lossyScale.x);
}
}
var homographyMat = SRDHelper.CalcHomographyMatrix(_srdManager.DisplayEdges.LeftUp.position, _srdManager.DisplayEdges.LeftBottom.position,
_srdManager.DisplayEdges.RightBottom.position, _srdManager.DisplayEdges.RightUp.position,
eyeCamera);
var invHomographyMat = SRDHelper.CalcInverseMatrix3x3(homographyMat);
homographyMaterial.SetFloatArray("_Homography", invHomographyMat);
homographyMaterial.SetFloatArray("_InvHomography", homographyMat);
};
if (_isSRPUsed)
{
#if SRP_AVAILABLE
SRPCallbackFunc srpCallback = (context, camera) =>
{
if (camera.name != eyeCamera.name)
{
return;
}
updateState(camera);
};
_eyeCamSRPPreCallback[type] = srpCallback;
RenderPipelineManager.beginCameraRendering += _eyeCamSRPPreCallback[type];
#endif
}
else
{
Camera.CameraCallback cameraStateUpdate = (camera) =>
{
if (camera.name != eyeCamera.name)
{
return;
}
updateState(camera);
};
_eyeCamStateUpdateCallback[type] = cameraStateUpdate;
// This Should be onPreCull for correct frustum culling, however onPreCull is fired before vblank sometimes.
// That's why onPreRender is used to make the latency shorter as possible
Camera.onPreRender += _eyeCamStateUpdateCallback[type];
}
}
