Method AddTimeStepInternal

Filters/Extraction/vtkExtractDataArraysOverTime.cxx:499–577

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//------------------------------------------------------------------------------
void vtkExtractDataArraysOverTime::vtkInternal::AddTimeStepInternal(
  unsigned int composite_index, int ts_index, double vtkNotUsed(time), vtkDataObject* input)
{
  int attributeType = this->Self->GetFieldAssociation();
  const bool statsOnly = this->Self->GetReportStatisticsOnly();

  vtkSmartPointer<vtkDataObject> data = input;
  if (statsOnly)
  {
    // instead of saving raw-data, we're going to track the summary.
    data = this->Summarize(input);
    attributeType = vtkDataObject::ROW;
  }

  if (!data)
  {
    return;
  }

  vtkDataSetAttributes* inDSA = data->GetAttributes(attributeType);
  const vtkIdType numIDs = inDSA->GetNumberOfTuples();
  if (numIDs <= 0)
  {
    return;
  }

  vtkIdTypeArray::Superclass* indexArray = nullptr;
  if (!statsOnly)
  {
    if (this->Self->GetUseGlobalIDs())
    {
      indexArray = vtkIdTypeArray::Superclass::FastDownCast(inDSA->GetGlobalIds());
    }
    else
    {
      // when not reporting stats, user can specify which array to use to index
      // elements.
      int association;
      indexArray = vtkIdTypeArray::Superclass::FastDownCast(
        this->Self->GetInputArrayToProcess(0, data, association));
      if (indexArray != nullptr && association != attributeType)
      {
        indexArray = nullptr;
      }
    }
  }

  const bool is_gid = (indexArray != nullptr && inDSA->GetGlobalIds() == indexArray);
  if (is_gid)
  {
    // if using global ids, then they are expected to be unique across
    // blocks. By discarding the composite-index, we can easily track
    // elements moving between blocks.
    composite_index = 0;
  }

  vtkDataSet* dsData = vtkDataSet::SafeDownCast(data);
  for (vtkIdType cc = 0; cc < numIDs; ++cc)