Method SelectTableFromTable

Filters/Extraction/vtkConvertSelection.cxx:107–150

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//------------------------------------------------------------------------------
int vtkConvertSelection::SelectTableFromTable(
  vtkTable* selTable, vtkTable* dataTable, vtkIdTypeArray* indices)
{
  std::set<vtkIdType> matching;
  vtkNew<vtkIdList> list;
  for (vtkIdType row = 0; row < selTable->GetNumberOfRows(); row++)
  {
    matching.clear();
    bool initialized = false;
    for (vtkIdType col = 0; col < selTable->GetNumberOfColumns(); col++)
    {
      vtkAbstractArray* from = selTable->GetColumn(col);
      vtkAbstractArray* to = dataTable->GetColumnByName(from->GetName());
      if (to)
      {
        to->LookupValue(selTable->GetValue(row, col), list);
        if (!initialized)
        {
          matching.insert(list->GetPointer(0), list->GetPointer(0) + list->GetNumberOfIds());
          initialized = true;
        }
        else
        {
          std::set<vtkIdType> intersection;
          std::sort(list->GetPointer(0), list->GetPointer(0) + list->GetNumberOfIds());
          std::set_intersection(matching.begin(), matching.end(), list->GetPointer(0),
            list->GetPointer(0) + list->GetNumberOfIds(),
            std::inserter(intersection, intersection.begin()));
          matching = intersection;
        }
      }
    }
    for (const auto& match : matching)
    {
      indices->InsertNextValue(match);
    }
    if (row % 100 == 0)
    {
      double progress = 0.8 * row / selTable->GetNumberOfRows();
      this->InvokeEvent(vtkCommand::ProgressEvent, &progress);
    }
  }
  return 1;
}

//------------------------------------------------------------------------------
int vtkConvertSelection::ConvertToIndexSelection(