SortIndices.h

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//============================================================================
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//
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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,
// are permitted provided that the following conditions are met:
//
// (1) Redistributions of source code must retain the above copyright notice, this
//     list of conditions and the following disclaimer.
//
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//     this list of conditions and the following disclaimer in the documentation
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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
//     used to endorse or promote products derived from this software without
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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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_mesh_dem_sort_indices_h
#define vtk_m_worklet_contourtree_augmented_mesh_dem_sort_indices_h
 
#include <vtkm/worklet/WorkletMapField.h>
 
namespace vtkm
{
namespace worklet
{
namespace contourtree_augmented
{
namespace data_set_mesh
{
 
// Worklet for computing the sort indices from the sort order
class SortIndices : public vtkm::worklet::WorkletMapField
{
public:
  typedef void ControlSignature(WholeArrayIn sortOrder,     // (input) index into active vertices
                                WholeArrayOut sortIndices); // (output) whether critical
  typedef void ExecutionSignature(_1, InputIndex, _2);
  using InputDomain = _1;
 
  // Constructor
  VTKM_EXEC_CONT
  SortIndices() {}
 
  template <typename InFieldPortalType, typename OutFieldPortalType>
  VTKM_EXEC void operator()(const InFieldPortalType& sortOrder,
                            const vtkm::Id vertexIndex,
                            const OutFieldPortalType& sortIndices) const
  {
    sortIndices.Set(sortOrder.Get(vertexIndex), vertexIndex);
  }
}; // Mesh2D_DEM_VertexStarter
 
} // namespace data_set_mesh
} // namespace contourtree_augmented
} // namespace worklet
} // namespace vtkm
 
#endif