Method ProcessTrees

Filters/Hybrid/vtkAdaptiveDataSetSurfaceFilter.cxx:225–319

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
void vtkAdaptiveDataSetSurfaceFilter::ProcessTrees(vtkHyperTreeGrid* input, vtkPolyData* output)
{
  if (this->Points)
  {
    this->Points->Delete();
  }
  // Create storage for corners of leaf cells
  this->Points = vtkPoints::New();

  // Create storage for unstructured leaf cells
  if (this->Cells)
  {
    this->Cells->Delete();
  }
  this->Cells = vtkCellArray::New();

  // Initialize a Locator
  if (this->Merging)
  {
    this->Locator = vtkMergePoints::New();
    this->Locator->InitPointInsertion(this->Points, input->GetBounds());
  }

  // Retrieve material mask
  this->Mask = input->HasMask() ? input->GetMask() : nullptr;

  if (this->Dimension == 3)
  {
    vtkIdType index;
    vtkHyperTreeGrid::vtkHyperTreeGridIterator it;
    input->InitializeTreeIterator(it);
    vtkNew<vtkHyperTreeGridNonOrientedVonNeumannSuperCursorLight> cursor;
    while (it.GetNextTree(index))
    {
      if (this->CheckAbort())
      {
        break;
      }
      // In 3 dimensions, von Neumann neighborhood information is needed
      input->InitializeNonOrientedVonNeumannSuperCursorLight(cursor, index);
      this->RecursivelyProcessTree3D(cursor, 0);
    }
  }
  else
  {
    vtkIdType index;
    vtkHyperTreeGrid::vtkHyperTreeGridIterator it;
    input->InitializeTreeIterator(it);
    vtkNew<vtkHyperTreeGridNonOrientedGeometryCursor> cursor;
    while (it.GetNextTree(index))
    {
      if (this->CheckAbort())
      {
        break;
      }
      // Otherwise, geometric properties of the cells suffice
      input->InitializeNonOrientedGeometryCursor(cursor, index);
      if (this->Dimension == 1)