Method CopyAndRotate

Filters/General/vtkAxisAlignedTransformFilter.cxx:458–493

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//------------------------------------------------------------------------------
void vtkAxisAlignedTransformFilter::CopyAndRotate(vtkHyperTree* input, vtkHyperTree* output,
  vtkIdType inputIndex, vtkIdType outputIndex, const std::vector<unsigned int>& permutation,
  unsigned int depth, vtkHyperTreeGridNonOrientedCursor* cursor)
{
  if (cursor->IsLeaf() || cursor->IsMasked())
  {
    if (!cursor->IsRoot())
    {
      cursor->ToParent();
    }
    return;
  }

  output->SubdivideLeaf(outputIndex, depth);

  vtkIdType inputBase = input->GetElderChildIndex(inputIndex);
  vtkIdType outputBase = output->GetElderChildIndex(outputIndex);

  size_t nChildren = permutation.size();

  // For each child index in the output, determine the corresponding
  // child in the input using the permutation vector
  for (size_t i = 0; i < nChildren; ++i)
  {
    vtkIdType inputChildIndex = inputBase + permutation[i];
    vtkIdType outputChildIndex = outputBase + i;

    cursor->ToChild(permutation[i]);
    this->CopyAndRotate(
      input, output, inputChildIndex, outputChildIndex, permutation, depth + 1, cursor);
  }
  if (!cursor->IsRoot())
  {
    cursor->ToParent();
  }
}

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void ApplyMask(vtkHyperTree* input, vtkHyperTree* output, vtkIdType inputIndex,