Method RequestData

Filters/General/vtkExplodeDataSet.cxx:79–123

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
int vtkExplodeDataSet::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  vtkDataSet* input = vtkDataSet::GetData(inputVector[0], 0);
  vtkPartitionedDataSetCollection* output =
    vtkPartitionedDataSetCollection::GetData(outputVector, 0);

  if (!input)
  {
    vtkErrorMacro(<< "Input is not a vtkDataSet. Aborting.");
  }

  vtkDataArray* inScalars = this->GetInputArrayToProcess(0, inputVector);
  if (!inScalars)
  {
    vtkErrorMacro(<< "No scalar data to process.");
    return 0;
  }

  std::map<double, vtkSmartPointer<vtkIdList>> cellsPerValue = this->GetIdListsByValue(inScalars);
  output->SetNumberOfPartitionedDataSets(static_cast<unsigned int>(cellsPerValue.size()));

  vtkIdType partId = 0;
  std::string arrayName = inScalars->GetName();
  for (const std::pair<const double, vtkSmartPointer<vtkIdList>>& valueIter : cellsPerValue)
  {
    const double partValue = valueIter.first;
    vtkIdList* partCellIds = valueIter.second;

    vtkSmartPointer<vtkPointSet> part =
      vtk::TakeSmartPointer(this->CreatePartition(input, partCellIds));
    output->SetPartition(partId, 0, part);
    std::string partName = arrayName + "_" + vtk::to_string(partId);
    output->GetMetaData(partId)->Set(vtkCompositeDataSet::NAME(), partName.c_str());
    partId++;

    vtkSmartPointer<vtkDataArray> fieldScalar = vtk::TakeSmartPointer(inScalars->NewInstance());
    fieldScalar->SetName(arrayName.c_str());
    fieldScalar->SetNumberOfTuples(1);
    fieldScalar->SetTuple1(0, partValue);
    part->GetFieldData()->AddArray(fieldScalar);
  }

  return 1;
}

//------------------------------------------------------------------------------
int vtkExplodeDataSet::FillInputPortInformation(int, vtkInformation* info)