AugmentBoundaryWithNecessaryInteriorSupernodesUnsetBoundarySupernodesWorklet.h

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//  PURPOSE.  See the above copyright notice for more information.
//============================================================================
// Copyright (c) 2018, The Regents of the University of California, through
// Lawrence Berkeley National Laboratory (subject to receipt of any required approvals
// from the U.S. Dept. of Energy).  All rights reserved.
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//=============================================================================
//
//  This code is an extension of the algorithm presented in the paper:
//  Parallel Peak Pruning for Scalable SMP Contour Tree Computation.
//  Hamish Carr, Gunther Weber, Christopher Sewell, and James Ahrens.
//  Proceedings of the IEEE Symposium on Large Data Analysis and Visualization
//  (LDAV), October 2016, Baltimore, Maryland.
//
//  The PPP2 algorithm and software were jointly developed by
//  Hamish Carr (University of Leeds), Gunther H. Weber (LBNL), and
//  Oliver Ruebel (LBNL)
//==============================================================================
 
#ifndef vtk_m_worklet_contourtree_distributed_bract_maker_augment_boundary_with_necessary_interior_supernodes_unset_boundary_supernodes_worklet_h
#define vtk_m_worklet_contourtree_distributed_bract_maker_augment_boundary_with_necessary_interior_supernodes_unset_boundary_supernodes_worklet_h
 
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/Types.h>
#include <vtkm/worklet/WorkletMapField.h>
 
namespace vtkm
{
namespace worklet
{
namespace contourtree_distributed
{
namespace bract_maker
{
 
class AugmentBoundaryWithNecessaryInteriorSupernodesUnsetBoundarySupernodesWorklet
  : public vtkm::worklet::WorkletMapField
{
public:
  using ControlSignature = void(FieldIn boundaryIndices,             // input
                                WholeArrayIn superparents,           // input
                                WholeArrayIn supernodes,             // input
                                WholeArrayOut isNecessaryAndInterior // output
 
 
  );
  using ExecutionSignature = void(_1, _2, _3, _4);
  using InputDomain = _1;
 
  // Default Constructor
  VTKM_EXEC_CONT
  AugmentBoundaryWithNecessaryInteriorSupernodesUnsetBoundarySupernodesWorklet() {}
 
  template <typename InFieldPortalType, typename OutFieldPortalType>
  VTKM_EXEC void operator()(const vtkm::Id& boundaryVertexSortID,
                            const InFieldPortalType& superparentsPortal,
                            const InFieldPortalType& supernodesPortal,
                            const OutFieldPortalType& isNecessaryAndInteriorPortal) const
  {
    vtkm::Id superparent = superparentsPortal.Get(boundaryVertexSortID);
    // if the superparent's supernode is the vertex, they match
    if (supernodesPortal.Get(superparent) == boundaryVertexSortID)
    {
      isNecessaryAndInteriorPortal.Set(superparent, false);
    }
    // In serial this worklet implements the following operation
    /*
    for (indexType boundaryVertex = 0; boundaryVertex < nBoundary; boundaryVertex++)
    { // per boundary vertex
      indexType boundaryVertexMeshID = bractVertexSuperset[boundaryVertex];
      indexType boundaryVertexSortID = boundaryIndices[boundaryVertex];
      indexType superparent = contourTree->superparents[boundaryVertexSortID];
      // if the superparent's supernode is the vertex, they match
      if (contourTree->supernodes[superparent] == boundaryVertexSortID)
        isNecessaryAndInterior[superparent] = false;
    } // per boundary vertex
    */
  }
 
}; // AugmentBoundaryWithNecessaryInteriorSupernodesUnsetBoundarySupernodesWorklet
 
 
} // namespace bract_maker
} // namespace contourtree_distributed
} // namespace worklet
} // namespace vtkm
 
#endif