Method ExtractSelectedRows

Filters/Extraction/vtkExtractSelection.cxx:1100–1136

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//------------------------------------------------------------------------------
void vtkExtractSelection::ExtractSelectedRows(
  vtkTable* input, vtkTable* output, vtkSignedCharArray* rowsInside, bool extractAll)
{
  const vtkIdType numRows = input->GetNumberOfRows();
  vtkNew<vtkIdTypeArray> originalRowIds;
  originalRowIds->SetName("vtkOriginalRowIds");

  output->GetRowData()->CopyFieldOff("vtkOriginalRowIds");
  output->GetRowData()->CopyStructure(input->GetRowData());

  if (!extractAll)
  {
    for (vtkIdType rowId = 0; rowId < numRows; ++rowId)
    {
      signed char isInside = rowsInside->GetTypedComponent(rowId, 0);
      if (isInside)
      {
        output->InsertNextRow(input->GetRow(rowId));
        originalRowIds->InsertNextValue(rowId);
      }
    }
  }
  else
  {
    output->ShallowCopy(input);
    originalRowIds->SetNumberOfTuples(numRows);
    vtkSMPTools::For(0, numRows,
      [&](vtkIdType beginRowId, vtkIdType endRowId)
      {
        for (vtkIdType rowId = beginRowId; rowId < endRowId; ++rowId)
        {
          originalRowIds->SetValue(rowId, rowId);
        }
      });
  }
  output->AddColumn(originalRowIds);
}

//------------------------------------------------------------------------------
void vtkExtractSelection::PrintSelf(ostream& os, vtkIndent indent)