GetArcFromDecorator.h

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//============================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt for details.
//  This software is distributed WITHOUT ANY WARRANTY; without even
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//  PURPOSE.  See the above copyright notice for more information.
//
//  Copyright 2014 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
//  Copyright 2014 UT-Battelle, LLC.
//  Copyright 2014 Los Alamos National Security.
//
//  Under the terms of Contract DE-NA0003525 with NTESS,
//  the U.S. Government retains certain rights in this software.
//
//  Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
//  Laboratory (LANL), the U.S. Government retains certain rights in
//  this software.
//============================================================================
// 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:
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// (1) Redistributions of source code must retain the above copyright notice, this
//     list of conditions and the following disclaimer.
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// (2) Redistributions in binary form must reproduce the above copyright notice,
//     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 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_mesh_inc_get_arc_from_functor_h
#define vtk_m_worklet_contourtree_augmented_contourtree_mesh_inc_get_arc_from_functor_h
 
namespace vtkm
{
namespace worklet
{
namespace contourtree_augmented
{
namespace mesh_dem_contourtree_mesh_inc
{
 
class GetArcFromDecoratorImpl
{
public:
  template <typename Portal1Type, typename Portal2Type>
  struct Functor
  {
    Portal1Type NeighborConnectivityPortal;
    Portal2Type ArcsPortal;
 
    VTKM_EXEC_CONT
    vtkm::Id operator()(vtkm::Id arcNo) const
    {
      vtkm::Id arc = NeighborConnectivityPortal.Get(arcNo);
      return (arc % 2 == 0) ? arc / 2 : MaskedIndex(ArcsPortal.Get(arc / 2));
    }
  };
 
  template <typename PT1, typename PT2>
  Functor<PT1, PT2> CreateFunctor(PT1 neighborConnectivityPortal, PT2 arcsPortal) const
  {
    return { neighborConnectivityPortal, arcsPortal };
  }
};
 
} // namespace mesh_dem_contourtree_mesh_inc
} // namespace contourtree_augmented
} // namespace worklet
} // namespace vtkm
 
#endif