UpdateHyperstructureSetSuperchildrenWorklet.h

Go to the documentation of this file.

//============================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt for details.
//
//  This software is distributed WITHOUT ANY WARRANTY; without even
//  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
//  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.
//
// (2) Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//
// (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
//     specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
// OF THE POSSIBILITY OF SUCH DAMAGE.
//
//=============================================================================
//  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_hierarchical_augmenter_update_hyperstructure_set_superchildren_worklet_h
#define vtk_m_worklet_contourtree_distributed_hierarchical_augmenter_update_hyperstructure_set_superchildren_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 hierarchical_augmenter
{
 
class UpdateHyperstructureSetSuperchildrenWorklet : public vtkm::worklet::WorkletMapField
{
public:
  using ControlSignature = void(
    WholeArrayIn augmentedTreeHypernodes, // input (we need both this and the next value)
    FieldOut augmentedTreeSuperchildren   // output
  );
  using ExecutionSignature = void(InputIndex, _1, _2);
  using InputDomain = _1;
 
  // Default Constructor
  VTKM_EXEC_CONT
  UpdateHyperstructureSetSuperchildrenWorklet(const vtkm::Id& augmentedTreeNumSupernodes)
    : AugmentedTreeNumSupernodes(augmentedTreeNumSupernodes)
  {
  }
 
 
  template <typename InFieldPortalType>
  VTKM_EXEC void operator()(
    const vtkm::Id& hypernode,
    const InFieldPortalType& augmentedTreeHypernodesPortal,
    vtkm::Id&
      augmentedTreeSuperchildrenValue // same as augmentedTree->superchildren[InputIndex] = ...
  ) const
  {
    // per hypernode
    // retrieve the new superId
    vtkm::Id superId = augmentedTreeHypernodesPortal.Get(hypernode);
    // and the next one over
    vtkm::Id nextSuperId;
    if (hypernode == augmentedTreeHypernodesPortal.GetNumberOfValues() - 1)
    {
      nextSuperId = this->AugmentedTreeNumSupernodes;
    }
    else
    {
      nextSuperId = augmentedTreeHypernodesPortal.Get(hypernode + 1);
    }
    // the difference is the number of superchildren
    augmentedTreeSuperchildrenValue = nextSuperId - superId;
 
    // In serial this worklet implements the following operation
    /*
      for (vtkm::Id hypernode = 0; hypernode < augmentedTree->hypernodes.size(); hypernode++)
      { // per hypernode
        // retrieve the new super ID
        vtkm::Id superID = augmentedTree->hypernodes[hypernode];
        // and the next one over
        vtkm::Id nextSuperID;
        if (hypernode == augmentedTree->hypernodes.size() - 1)
          nextSuperID = augmentedTree->supernodes.size();
        else
          nextSuperID = augmentedTree->hypernodes[hypernode+1];
        // the difference is the number of superchildren
        augmentedTree->superchildren[hypernode] = nextSuperID - superID;
      } // per hypernode
 
    */
  } // operator()()
 
private:
  const vtkm::Id AugmentedTreeNumSupernodes;
}; // UpdateHyperstructureSetSuperchildrenWorklet
 
} // namespace hierarchical_augmenter
} // namespace contourtree_distributed
} // namespace worklet
} // namespace vtkm
 
#endif