ComputeHyperAndSuperStructure_SetNewHypernodesAndArcs.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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//     Laboratory, U.S. Dept. of Energy nor the names of its contributors may be
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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_augmented_contourtree_maker_inc_set_new_hyper_nodes_and_arcs_h
#define vtk_m_worklet_contourtree_augmented_contourtree_maker_inc_set_new_hyper_nodes_and_arcs_h
 
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/Types.h>
#include <vtkm/worklet/WorkletMapField.h>
 
namespace vtkm
{
namespace worklet
{
namespace contourtree_augmented
{
namespace contourtree_maker_inc
{
 
// Worklet for settubg the super/hyperarcs fromm the permuted super/hyperarcs vector
class ComputeHyperAndSuperStructure_SetNewHypernodesAndArcs : public vtkm::worklet::WorkletMapField
{
public:
  typedef void ControlSignature(FieldIn contourTreeSupernodes, // (input) active super/hyperarcs
                                WholeArrayIn contourTreeWhenTransferred, // (input)
                                WholeArrayIn contourTreeHypernodes,      // (input)
                                WholeArrayIn contourTreeHyperarcs,       // (input)
                                WholeArrayIn newHypernodePosition,       // (input)
                                WholeArrayOut newHypernodes,             // (output)
                                WholeArrayOut newHyperarcs               // (output)
  );                                                                     // (output)
  typedef void ExecutionSignature(_1, InputIndex, _2, _3, _4, _5, _6, _7);
  using InputDomain = _1;
 
  // Default Constructor
  VTKM_EXEC_CONT
  ComputeHyperAndSuperStructure_SetNewHypernodesAndArcs() {}
 
  template <typename InFieldPortalType, typename OutFieldPortalType>
  VTKM_EXEC void operator()(const vtkm::Id& /*supernodeID*/, // FIXME: Remove unused parameter?
                            const vtkm::Id supernode,
                            const InFieldPortalType& contourTreeWhenTransferredPortal,
                            const InFieldPortalType& contourTreeHypernodesPortal,
                            const InFieldPortalType& contourTreeHyperarcsPortal,
                            const InFieldPortalType& newHypernodePositionPortal,
                            const OutFieldPortalType& newHypernodesPortal,
                            const OutFieldPortalType& newHyperarcsPortal) const
  {
    bool isAHypernode = IsHypernode(contourTreeWhenTransferredPortal.Get(supernode));
    // ignore non-hypernodes
    // all others (including the root hypernode) are kept
    if (isAHypernode)
    {
      newHypernodesPortal.Set(newHypernodePositionPortal.Get(supernode),
                              contourTreeHypernodesPortal.Get(supernode));
      newHyperarcsPortal.Set(newHypernodePositionPortal.Get(supernode),
                             contourTreeHyperarcsPortal.Get(supernode));
    }
 
    // In serial this worklet implements the following operation
    /*
      for (vtkm::Id supernode = 0; supernode < contourTree.Supernodes.size(); supernode++)
        { // per supernode
          bool isAHypernode = IsHypernode(contourTree.WhenTransferred[supernode]);
 
          // ignore non-hypernodes
          // all others (including the root hypernode) are kept
          if (isAHypernode)
            {
              newHypernodes[newHypernodePosition[supernode]] = contourTree.hypernodes[supernode];
              newHyperarcs[newHypernodePosition[supernode]] = contourTree.hyperarcs[supernode];
            }
        } // per supernode
      */
  }
 
}; // AugmentMergeTrees_InitNewJoinSplitIDAndSuperparents.h
 
} // namespace contourtree_maker_inc
} // namespace contourtree_augmented
} // namespace worklet
} // namespace vtkm
 
#endif