Function FillFieldArrayValues

IO/CatalystConduit/vtkDataObjectToConduit.cxx:769–815

}

bool FillFieldArrayValues(vtkDataSet* data_set, conduit_cpp::Node& values_node,
  const std::string& association, vtkDataArray* data_array)
{
  bool is_success = true;
  auto pointSet = vtkPointSet::SafeDownCast(data_set);

  // Conversion may fail for cell types TRIANGLE_STRIP, POLY_LINE, POLY_VERTEX
  // Where we create more than 1 conduit cell for each VTK cell. We need to insert values to
  // handle this case And avoid having less cell field values than cells in the Conduit node.
  if (association == "element" && pointSet && HasMultiCells(pointSet))
  {
    const std::map<int, int> topo_num_vertices{ { VTK_POLY_VERTEX, 1 }, { VTK_POLY_LINE, 2 },
      { VTK_TRIANGLE_STRIP, 3 } };

    auto newArray = vtkSmartPointer<vtkDataArray>::NewInstance(data_array);
    newArray->Allocate(data_array->GetNumberOfTuples());
    newArray->SetNumberOfComponents(data_array->GetNumberOfComponents());
    for (vtkIdType i = 0; i < pointSet->GetNumberOfCells(); i++)
    {
      auto type = pointSet->GetCellType(i);

      if (topo_num_vertices.find(type) != topo_num_vertices.end())
      {
        // triangle strip with 5 points has 3 triangles
        auto numCells = pointSet->GetCellSize(i) - topo_num_vertices.at(type) + 1;
        for (vtkIdType j = 0; j < numCells; j++)
        {
          newArray->InsertNextTuple(data_array->GetTuple(i));
        }
      }
      else
      {
        newArray->InsertNextTuple(data_array->GetTuple(i));
      }
    }

    // Array is not owned in this case, hard copy it
    is_success =
      ::ConvertDataArrayToMCArray(newArray, values_node, std::vector<std::string>(), false);
  }
  else
  {
    is_success = ::ConvertDataArrayToMCArray(data_array, values_node);
  }

  return is_success;
}

//----------------------------------------------------------------------------
bool FillFields(vtkDataSet* data_set, vtkFieldData* field_data, const std::string& association,