Method InsertPolyData

Rendering/Core/vtkCompositePolyDataMapper.cxx:454–494

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//------------------------------------------------------------------------------
vtkCompositePolyDataMapper::MapperHashType vtkCompositePolyDataMapper::InsertPolyData(
  vtkPolyData* polydata, const unsigned int& flatIndex)
{
  if (polydata == nullptr)
  {
    vtkDebugMacro(<< "DataObject at flatIndex=" << flatIndex
                  << " is not a vtkPolyData or a vtkPolyData derived instance!");
    return std::numeric_limits<MapperHashType>::max();
  }
  if (polydata->GetPoints() == nullptr || !polydata->GetNumberOfPoints())
  {
    vtkDebugMacro(<< "vtkPolyData at flatIndex=" << flatIndex
                  << " does not have points. It will not be rendered.");
    return std::numeric_limits<MapperHashType>::max();
  }
  auto& internals = (*this->Internals);
  const auto hash = this->GenerateHash(polydata);
  // Find a mapper. If it doesn't exist, a new one is created.
  internals.BatchedDelegators.emplace(hash, nullptr);
  auto& delegator = internals.BatchedDelegators.at(hash);
  if (delegator == nullptr)
  {
    delegator.TakeReference(this->CreateADelegator());
    delegator->SetParent(this);
  }
  delegator->ShallowCopy(this);
  delegator->Mark();

  auto createBatchElement =
    [](vtkPolyData* _polydata,
      unsigned int _flatIndex) -> vtkCompositePolyDataMapperDelegator::BatchElement
  {
    vtkCompositePolyDataMapperDelegator::BatchElement element;
    element.PolyData = _polydata;
    element.FlatIndex = _flatIndex;
    return element;
  };

  delegator->Insert(createBatchElement(polydata, flatIndex));
  return hash;
}

//------------------------------------------------------------------------------
void vtkCompositePolyDataMapper::BuildRenderValues(