Method Render

Rendering/VolumeOpenGL2/vtkMultiBlockUnstructuredGridVolumeMapper.cxx:70–94

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//------------------------------------------------------------------------------
void vtkMultiBlockUnstructuredGridVolumeMapper::Render(vtkRenderer* ren, vtkVolume* vol)
{
  vtkDataObject* dataObj = this->GetDataObjectInput();
  if (dataObj->GetMTime() != this->BlockLoadingTime)
  {
    vtkDebugMacro("Reloading data blocks!");
    this->LoadDataSet();
    this->BlockLoadingTime = dataObj->GetMTime();
  }

  vol->GetModelToWorldMatrix(this->TempMatrix4x4);
  this->SortMappers(ren, this->TempMatrix4x4);

  for (auto& mapper : this->Mappers)
  {
    int unused = 0;
    auto input = mapper->GetInput();
    auto scalars = vtkAbstractMapper::GetScalars(
      input, this->ScalarMode, this->ArrayAccessMode, this->ArrayId, this->ArrayName, unused);
    if (scalars != nullptr)
    {
      mapper->Render(ren, vol);
    }
  }
}

//------------------------------------------------------------------------------
void vtkMultiBlockUnstructuredGridVolumeMapper::SortMappers(