Method ConnectMapperInput

Rendering/VolumeOpenGL2/vtkSmartVolumeMapper.cxx:736–777

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

//------------------------------------------------------------------------------
void vtkSmartVolumeMapper::ConnectMapperInput(vtkVolumeMapper* m)
{
  assert("pre: m_exists" && m != nullptr);

  bool needShallowCopy = false;
  vtkDataSet* data = m->GetInput();

  if (data == nullptr || data == this->InputDataMagnitude)
  {
    if (vtkImageData::SafeDownCast(this->GetInput()))
    {
      if (vtkUniformGrid::SafeDownCast(this->GetInput()))
      {
        data = vtkUniformGrid::New();
      }
      else
      {
        data = vtkImageData::New();
      }
    }
    else if (vtkRectilinearGrid::SafeDownCast(this->GetInput()))
    {
      data = vtkRectilinearGrid::New();
    }
    m->SetInputDataObject(data);
    needShallowCopy = true;
    data->Delete();
  }
  else
  {
    needShallowCopy =
      ((this->LastInput != this->GetInput()) || (data->GetMTime() < this->GetInput()->GetMTime()));

    m->SetInputDataObject(data);
  }

  if (needShallowCopy)
  {
    data->ShallowCopy(this->GetInput());
    this->LastInput = this->GetInput();
  }
}

//------------------------------------------------------------------------------
void vtkSmartVolumeMapper::ConnectFilterInput(vtkImageResample* f)