Method RequestData

Rendering/Core/vtkMapArrayValues.cxx:110–267

}

int vtkMapArrayValues::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  // get the info objects
  vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
  vtkInformation* outInfo = outputVector->GetInformationObject(0);

  // get the input and output
  vtkDataObject* input = inInfo->Get(vtkDataObject::DATA_OBJECT());
  vtkDataObject* output = outInfo->Get(vtkDataObject::DATA_OBJECT());

  if (!this->InputArrayName)
  {
    // vtkErrorMacro(<<"Input array not specified.");
    output->ShallowCopy(input);
    return 1;
  }

  vtkDataSetAttributes* ods = nullptr;
  if (vtkDataSet::SafeDownCast(input))
  {
    vtkDataSet* dsInput = vtkDataSet::SafeDownCast(input);
    vtkDataSet* dsOutput = vtkDataSet::SafeDownCast(output);
    // This has to be here because it initialized all field datas.
    dsOutput->CopyStructure(dsInput);

    if (dsOutput->GetFieldData() && dsInput->GetFieldData())
    {
      dsOutput->GetFieldData()->PassData(dsInput->GetFieldData());
    }
    dsOutput->GetPointData()->PassData(dsInput->GetPointData());
    dsOutput->GetCellData()->PassData(dsInput->GetCellData());
    switch (this->FieldType)
    {
      case vtkMapArrayValues::POINT_DATA:
        ods = dsOutput->GetPointData();
        break;
      case vtkMapArrayValues::CELL_DATA:
        ods = dsOutput->GetCellData();
        break;
      default:
        vtkErrorMacro(<< "Data must be point or cell for vtkDataSet");
        return 0;
    }
  }
  else if (vtkGraph::SafeDownCast(input))
  {
    vtkGraph* graphInput = vtkGraph::SafeDownCast(input);
    vtkGraph* graphOutput = vtkGraph::SafeDownCast(output);
    graphOutput->ShallowCopy(graphInput);
    switch (this->FieldType)
    {
      case vtkMapArrayValues::VERTEX_DATA:
        ods = graphOutput->GetVertexData();
        break;
      case vtkMapArrayValues::EDGE_DATA:
        ods = graphOutput->GetEdgeData();
        break;