ListNewNodesCopyIdsWorklet.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.
//
// Redistribution and use in source and binary forms, with or without modification,
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//     list of conditions and the following disclaimer.
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// (3) Neither the name of the University of California, Lawrence Berkeley National
//     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_distributed_tree_grafter_list_new_nodes_copy_ids_worklet_h
#define vtk_m_worklet_contourtree_distributed_tree_grafter_list_new_nodes_copy_ids_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 tree_grafter
{
 
// In TreeGrafter.InitializeActiveSuperarcs set TreeGrafter.ActiveSuperarcs
class ListNewNodesCopyIdsWorklet : public vtkm::worklet::WorkletMapField
{
public:
  using ControlSignature = void(
    FieldIn globalIdsForBoundaryTreeMeshIndices, // input iteration index.
    ExecObject findRegularByGlobal,              // input to findRegularByGlobal
    WholeArrayOut
      hierarchicalTreeId // output  (need WholeArrayOut because globalIdsForBoundaryTreeMeshIndices is 1 smaller and need to avoid false resize
  );
 
  using ExecutionSignature = void(InputIndex, _1, _2, _3);
  using InputDomain = _1;
 
  // Default Constructor
  VTKM_EXEC_CONT
  ListNewNodesCopyIdsWorklet() {}
 
  template <typename ExecObjectType, typename OutFieldPortalType>
  VTKM_EXEC void operator()(const vtkm::Id& vertex,
                            const vtkm::Id& globalId,
                            const ExecObjectType& findRegularByGlobal,
                            const OutFieldPortalType& hierarchicalTreeIdPortal) const
  { // operator ()
    // the lookup to mesh->GetGlobalIDFromMeshIndex is done outside the worklet
    // for all mesh ids so all we need to do here is call FindRegularByGlobal
    hierarchicalTreeIdPortal.Set(vertex, findRegularByGlobal.FindRegularByGlobal(globalId));
 
    // In serial this worklet implements the following operation
    /*
    for (indexType vertex = 0; vertex < contourTree->nodes.size(); vertex++)
    { // per vertex in the bract
      // now convert to a global index
      indexType globalID = mesh->GetGlobalIDFromMeshIndex(vertex);
 
      // look that one up and store the result (NO_SUCH_ELEMENT is acceptable, but should never occur)
      hierarchicalTreeID[vertex] = hierarchicalTree.FindRegularByGlobal(globalID);
    } // per vertex in the bract
 
    */
  } // operator ()
 
}; // BoundaryVerticiesPerSuperArcStepOneWorklet
 
} // namespace tree_grafter
} // namespace contourtree_distributed
} // namespace worklet
} // namespace vtkm
 
#endif