Method ProcessTrees

Filters/HyperTree/vtkHyperTreeGridToUnstructuredGrid.cxx:50–132

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//------------------------------------------------------------------------------
int vtkHyperTreeGridToUnstructuredGrid::ProcessTrees(
  vtkHyperTreeGrid* input, vtkDataObject* outputDO)
{
  // Downcast output data object to hyper tree grid
  vtkUnstructuredGrid* output = vtkUnstructuredGrid::SafeDownCast(outputDO);
  if (!output)
  {
    vtkErrorMacro("Incorrect type of output: " << outputDO->GetClassName());
    return 0;
  }

  // Set instance variables needed for this conversion
  this->Points = vtkPoints::New();
  this->Cells = vtkCellArray::New();
  this->Dimension = input->GetDimension();
  this->Orientation = input->GetOrientation();
  this->Axes = input->GetAxes();

  // Initialize output cell data
  this->InData = input->GetCellData();
  this->OutData = output->GetCellData();
  this->OutData->CopyAllocate(this->InData);

  if (this->AddOriginalIds)
  {
    this->OriginalIds = vtkIdTypeArray::New();
    this->OriginalIds->SetName("OriginalIds");
    this->OriginalIds->SetNumberOfComponents(1);
    this->OriginalIds->SetNumberOfTuples(input->GetNumberOfLeaves());
  }

  // Iterate over all hyper trees
  vtkIdType index;
  vtkHyperTreeGrid::vtkHyperTreeGridIterator it;
  input->InitializeTreeIterator(it);
  vtkNew<vtkHyperTreeGridNonOrientedGeometryCursor> cursor;
  while (it.GetNextTree(index))
  {
    if (this->CheckAbort())
    {
      break;
    }
    // Initialize new geometric cursor at root of current tree
    input->InitializeNonOrientedGeometryCursor(cursor, index);

    // Convert hyper tree into unstructured mesh recursively
    this->RecursivelyProcessTree(cursor);
  } // it

  // Set output geometry and topology
  output->SetPoints(this->Points);
  switch (this->Dimension)
  {
    case 1:
      // 1D cells are lines
      output->SetCells(VTK_LINE, this->Cells);
      break;
    case 2: