Method HasTranslucentPolygonalGeometry

Rendering/Core/vtkCompositePolyDataMapper.cxx:258–302

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

//------------------------------------------------------------------------------
bool vtkCompositePolyDataMapper::HasTranslucentPolygonalGeometry()
{
  // Make sure that we have been properly initialized.
  if (this->GetInputAlgorithm() == nullptr)
  {
    return false;
  }

  if (!this->Static)
  {
    this->InvokeEvent(vtkCommand::StartEvent, nullptr);
    this->GetInputAlgorithm()->Update();
    this->InvokeEvent(vtkCommand::EndEvent, nullptr);
  }

  auto input = this->GetInputDataObject(0, 0);
  if (input == nullptr)
  {
    return false;
  }

  // rebuild the render values if needed
  vtkCompositeDataDisplayAttributes* cda = this->GetCompositeDataDisplayAttributes();
  vtkScalarsToColors* lut = this->ScalarVisibility ? this->GetLookupTable() : nullptr;

  this->TempState.Clear();
  this->TempState.Append(cda ? cda->GetMTime() : 0, "cda mtime");
  this->TempState.Append(lut ? lut->GetMTime() : 0, "lut mtime");
  this->TempState.Append(input->GetMTime(), "input mtime");
  if (this->TranslucentState != this->TempState)
  {
    this->TranslucentState = this->TempState;
    if (lut)
    {
      // Ensure that the lookup table is built
      lut->Build();
    }

    // Push base-values on the state stack.
    unsigned int flat_index = 0;
    this->HasTranslucentGeometry = this->RecursiveHasTranslucentGeometry(input, flat_index);
  }

  return this->HasTranslucentGeometry;
}

//------------------------------------------------------------------------------
void vtkCompositePolyDataMapper::Render(vtkRenderer* renderer, vtkActor* actor)