Method GetLevelZeroCoordinatesFromIndex

Common/DataModel/vtkHyperTreeGrid.cxx:1452–1477

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void vtkHyperTreeGrid::GetLevelZeroCoordinatesFromIndex(
  vtkIdType treeindex, unsigned int& i, unsigned int& j, unsigned int& k) const
{
  // Distinguish between two cases depending on indexing order
  if (this->TransposedRootIndexing)
  {
    unsigned long nbKxJ =
      static_cast<unsigned long>(this->CellDims[2]) * static_cast<unsigned long>(this->CellDims[1]);
    i = static_cast<unsigned int>(treeindex / nbKxJ);
    vtkIdType reste = treeindex - i * nbKxJ;
    j = static_cast<unsigned int>(reste / this->CellDims[2]);
    k = static_cast<unsigned int>(reste - j * this->CellDims[2]);
  }
  else
  {
    unsigned long nbIxJ = this->CellDims[0] * this->CellDims[1];
    k = static_cast<unsigned int>(treeindex / nbIxJ);
    vtkIdType reste = treeindex - k * nbIxJ;
    j = static_cast<unsigned int>(reste / this->CellDims[0]);
    i = static_cast<unsigned int>(reste - j * this->CellDims[0]);
  }

  assert(i < this->CellDims[0]);
  assert(j < this->CellDims[1]);
  assert(k < this->CellDims[2]);
}

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void vtkHyperTreeGrid::GetLevelZeroOriginAndSizeFromIndex(