Method operator()

Common/DataModel/vtkPolyData.cxx:761–787

  // type are valid for the target cell array or throw a std::runtime_error.
  template <typename OffsetsT, typename ConnectivityT, typename SizeToTypeFunctor>
  void operator()(OffsetsT* offsets, ConnectivityT* vtkNotUsed(conn),
    vtkPolyData_detail::CellMap* map, vtkIdType beginCellId, SizeToTypeFunctor&& typer)
  {
    const vtkIdType numCells = offsets->GetNumberOfValues() - 1;
    if (numCells == 0)
    {
      return;
    }

    if (!vtkPolyData_detail::CellMap::ValidateCellId(numCells - 1))
    {
      throw std::runtime_error("Cell map storage capacity exceeded.");
    }

    auto buildCellsOperator = [&](vtkIdType begin, vtkIdType end)
    {
      for (vtkIdType cellId = begin, globalCellId = beginCellId + begin; cellId < end;
           ++cellId, ++globalCellId)
      {
        map->InsertCell(globalCellId, cellId, typer(GetCellSize(offsets, cellId)));
      }
    };
    // We use Threshold to test if the data size is small enough
    // to execute the functor serially. This is faster.
    // and also potentially avoids nested multithreading which creates race conditions.
    vtkSMPTools::For(0, numCells, vtkSMPTools::THRESHOLD, buildCellsOperator);
  }
};

} // end anon namespace