Method RequestData

Filters/Modeling/vtkQuadRotationalExtrusionFilter.cxx:142–505

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

  // Get composite input
  vtkCompositeDataSet* compositeInput =
    vtkCompositeDataSet::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));

  // Get typed output
  vtkMultiBlockDataSet* compositeOutput =
    vtkMultiBlockDataSet::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

  if (compositeInput == nullptr || compositeOutput == nullptr)
  {
    vtkErrorMacro(<< "Invalid algorithm connection\n");
    return 0;
  }

  vtkDebugMacro(<< "input=" << compositeInput->GetClassName() << "\n");

  // we want the output to have the same structure than the input
  compositeOutput->CopyStructure(compositeInput);

  // allocate composite iterator
  vtkCompositeDataIterator* inputIterator = compositeInput->NewIterator();
  inputIterator->SkipEmptyNodesOff();
  inputIterator->InitTraversal();

  vtkCompositeDataIterator* outputIterator = compositeOutput->NewIterator();
  outputIterator->SkipEmptyNodesOff();
  outputIterator->InitTraversal();

  while (inputIterator->IsDoneWithTraversal() == 0)
  {
    if (this->CheckAbort())
    {
      break;
    }
    // get the input and output
    int blockId = inputIterator->GetCurrentFlatIndex();
    vtkPolyData* input = vtkPolyData::SafeDownCast(inputIterator->GetCurrentDataObject());
    inputIterator->GoToNextItem();
    if (!input)
    {
      outputIterator->GoToNextItem();
      continue;
    }

    vtkPolyData* output = vtkPolyData::New();
    compositeOutput->SetDataSet(outputIterator, output);
    outputIterator->GoToNextItem();
    output->Delete();

    vtkIdType numPts, numCells;
    numPts = input->GetNumberOfPoints();