Method SortArrayByComponent

Common/Core/vtkSortDataArray.cxx:414–442

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//------------------------------------------------------------------------------
void vtkSortDataArray::SortArrayByComponent(vtkAbstractArray* arr, int k, int dir)
{
  // Check input
  if (arr == nullptr)
  {
    return;
  }
  vtkIdType numKeys = arr->GetNumberOfTuples();
  int nc = arr->GetNumberOfComponents();

  if (k < 0 || k >= nc)
  {
    vtkGenericWarningMacro(
      "Cannot sort by column " << k << " since the array only has columns 0 through " << (nc - 1));
    return;
  }

  // Perform the sort
  vtkIdType* idx = vtkSortDataArray::InitializeSortIndices(numKeys);

  void* dataIn = arr->GetVoidPointer(0);
  int dataType = arr->GetDataType();
  vtkSortDataArray::GenerateSortIndices(dataType, dataIn, numKeys, nc, k, idx);

  vtkSortDataArray::ShuffleArray(idx, dataType, numKeys, nc, arr, dataIn, dir);

  // Clean up
  delete[] idx;
}

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