Method RequestData

Filters/Parallel/vtkCleanArrays.cxx:329–437

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

//----------------------------------------------------------------------------
int vtkCleanArrays::RequestData(
  vtkInformation*, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  vtkDataObject* inputDO = vtkDataObject::GetData(inputVector[0], 0);
  vtkDataObject* outputDO = vtkDataObject::GetData(outputVector, 0);
  vtkShallowCopy(outputDO, inputDO);
  vtkCompositeDataSet* outputCD = vtkCompositeDataSet::SafeDownCast(outputDO);

  vtkMultiProcessController* controller = this->Controller;
  if ((!controller || controller->GetNumberOfProcesses() <= 1) && outputCD == nullptr)
  {
    // Nothing to do since not running in parallel or on composite datasets.
    return 1;
  }

  // Build the array sets for all attribute types across all blocks (if any).
  vtkCleanArrays::vtkArraySet arraySets[vtkDataObject::NUMBER_OF_ATTRIBUTE_TYPES];
  if (outputCD)
  {
    vtkSmartPointer<vtkCompositeDataIterator> iter;
    iter.TakeReference(outputCD->NewIterator());
    for (iter->InitTraversal(); !iter->IsDoneWithTraversal(); iter->GoToNextItem())
    {
      vtkDataObject* dobj = iter->GetCurrentDataObject();
      for (int attr = 0; attr < vtkDataObject::NUMBER_OF_ATTRIBUTE_TYPES; attr++)
      {
        if (vtkSkipAttributeType(attr))
        {
          continue;
        }
        if (dobj->GetNumberOfElements(attr) > 0)
        {
          vtkCleanArrays::vtkArraySet myset;
          myset.Initialize(dobj->GetAttributesAsFieldData(attr));
          if (this->FillPartialArrays)
          {
            arraySets[attr].Union(myset);
          }
          else
          {
            arraySets[attr].Intersection(myset);
          }
        }
      }
    }
  }
  else
  {
    for (int attr = 0; attr < vtkDataObject::NUMBER_OF_ATTRIBUTE_TYPES; attr++)
    {
      if (vtkSkipAttributeType(attr))
      {
        continue;
      }
      if (outputDO->GetNumberOfElements(attr) > 0)
      {
        arraySets[attr].Initialize(outputDO->GetAttributesAsFieldData(attr));
      }