Method UpdatePaths

Rendering/Image/vtkImageStack.cxx:557–587

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
void vtkImageStack::UpdatePaths()
{
  if (this->GetMTime() > this->PathTime ||
    (this->Paths && this->Paths->GetMTime() > this->PathTime))
  {
    if (this->Paths)
    {
      this->Paths->Delete();
    }

    // Create the list to hold all the paths
    this->Paths = vtkAssemblyPaths::New();
    vtkAssemblyPath* path = vtkAssemblyPath::New();

    // Add ourselves to the path to start things off
    path->AddNode(this, this->GetMatrix());

    // Add the active image
    vtkImageSlice* image = this->GetActiveImage();

    if (image)
    {
      path->AddNode(image, image->GetMatrix());
      image->BuildPaths(this->Paths, path);
      path->DeleteLastNode();
    }

    path->Delete();
    this->PathTime.Modified();
  }
}

//------------------------------------------------------------------------------
void vtkImageStack::BuildPaths(vtkAssemblyPaths* paths, vtkAssemblyPath* path)