Method ProcessTrees

Filters/HyperTree/vtkHyperTreeGridAxisCut.cxx:75–212

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

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

  // This filter works only with 3D grids
  if (input->GetDimension() != 3)
  {
    vtkErrorMacro(<< "Bad input dimension:" << input->GetDimension());
    return 0;
  }

  output->Initialize();

  // Retrieve normal axis and intercept of cut plane
  int axis = this->PlaneNormalAxis;

  this->PlanePositionRealUse = this->PlanePosition;

  double inter = this->PlanePositionRealUse;

  // Set output grid sizes; must be 1 in the direction of cut plane normal
  unsigned int size[3];
  input->GetDimensions(size);
  size[axis] = 1;
  output->SetDimensions(size);

  vtkUniformHyperTreeGrid* inputUHTG = vtkUniformHyperTreeGrid::SafeDownCast(input);
  vtkUniformHyperTreeGrid* outputUHTG = vtkUniformHyperTreeGrid::SafeDownCast(outputDO);
  if (inputUHTG)
  {
    outputUHTG->CopyCoordinates(inputUHTG);
    outputUHTG->SetFixedCoordinates(axis, inter);
  }
  else
  {
    output->CopyCoordinates(input);
    output->SetFixedCoordinates(axis, inter);
  }

  // Other grid parameters are identical
  output->SetTransposedRootIndexing(input->GetTransposedRootIndexing());
  output->SetBranchFactor(input->GetBranchFactor());
  output->SetHasInterface(input->GetHasInterface());
  output->SetInterfaceNormalsName(input->GetInterfaceNormalsName());
  output->SetInterfaceInterceptsName(input->GetInterfaceInterceptsName());

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

  // Output indices begin at 0