Function SanitizeHTGMask

Filters/Extraction/vtkExtractSelection.cxx:47–69

Recursive check for visible cells and propagate up visibility to parents

// Recursive check for visible cells and propagate up visibility to parents
bool SanitizeHTGMask(vtkHyperTreeGridNonOrientedCursor* cursor)
{
  if (!cursor->IsLeaf())
  {
    bool isMasked = cursor->IsMasked();
    if (isMasked)
    {
      cursor->SetMask(false);
    }
    bool checkLowerLevelVisible = false;
    for (vtkIdType iChild = 0; iChild < cursor->GetNumberOfChildren(); ++iChild)
    {
      cursor->ToChild(iChild);
      checkLowerLevelVisible = SanitizeHTGMask(cursor) || checkLowerLevelVisible;
      cursor->ToParent();
    }
    if (!checkLowerLevelVisible && isMasked)
    {
      cursor->SetMask(true);
    }
  }
  return !cursor->IsMasked();
}

}