Method Synchronize

Rendering/ANARI/vtkAnariLightNode.cxx:178–434

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//----------------------------------------------------------------------------
void vtkAnariLightNode::Synchronize(bool prepass)
{
  vtkAnariProfiling startProfiling("vtkAnariLightNode::Synchronize", vtkAnariProfiling::BROWN);
  if (!prepass || !LightWasModified())
  {
    return;
  }

  vtkLight* light = this->GetVtkLight();
  this->RenderTime = light->GetMTime();

  auto anariDevice = this->Internals->RendererNode->GetDeviceHandle();
  auto vtkRenderer = this->Internals->RendererNode->GetRenderer();
  auto anariExtensions = this->Internals->RendererNode->GetAnariDeviceExtensions();

  this->ClearLight();

  vtkOpenGLRenderer* openGLRenderer =
    vtkOpenGLRenderer::SafeDownCast(this->Internals->RendererNode->GetRenderable());
  vtkTransform* userLightTransform = openGLRenderer->GetUserLightTransform();

  vtkNew<vtkMatrix4x4> cameraTransform;
  vtkNew<vtkMatrix4x4> invCameraTransform;

  if (userLightTransform)
  {
    vtkAnariCameraNode* anariCameraNode = static_cast<vtkAnariCameraNode*>(
      this->Internals->RendererNode->GetFirstChildOfType("vtkAnariCameraNode"));
    vtkCamera* vtkCamera = vtkCamera::SafeDownCast(anariCameraNode->GetRenderable());
    vtkCamera->GetModelViewTransformObject()->GetMatrix(cameraTransform);
    vtkMatrix4x4::Invert(cameraTransform, invCameraTransform);
  }

  // Light Position
  double position[3];
  light->GetPosition(position);

  // Light Direction
  double focalPoint[3];
  light->GetFocalPoint(focalPoint);

  if (light->LightTypeIsCameraLight())
  {
    light->GetTransformedPosition(position);
    light->GetTransformedFocalPoint(focalPoint);
  }

  if (!light->LightTypeIsSceneLight() && userLightTransform)
  {
    cameraTransform->MultiplyPoint(position, position);
    userLightTransform->TransformPoint(position, position);
    invCameraTransform->MultiplyPoint(position, position);

    cameraTransform->MultiplyPoint(focalPoint, focalPoint);
    userLightTransform->TransformPoint(focalPoint, focalPoint);
    invCameraTransform->MultiplyPoint(focalPoint, focalPoint);
  }