mirror of
https://gitlab.kitware.com/vtk/vtk-m
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90 lines
3.0 KiB
C
90 lines
3.0 KiB
C
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//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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//=======================================================================================
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//
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// Second Attempt to Compute Contour Tree in Data-Parallel Mode
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//
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// Started August 19, 2015
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//
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// Copyright Hamish Carr, University of Leeds
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//
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// RegularToCriticalDown.h - functor that performs conditional chain-doubling
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//
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//=======================================================================================
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//
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// COMMENTS:
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//
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//
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//=======================================================================================
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#ifndef vtkm_worklet_contourtree_regular_to_critical_down_h
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#define vtkm_worklet_contourtree_regular_to_critical_down_h
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#include <vtkm/worklet/WorkletMapField.h>
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#include <vtkm/exec/ExecutionWholeArray.h>
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#include <vtkm/worklet/contourtree/Types.h>
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namespace vtkm {
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namespace worklet {
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namespace contourtree {
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// Worklet for doing regular to critical
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class RegularToCriticalDown : public vtkm::worklet::WorkletMapField
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{
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public:
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typedef void ControlSignature(FieldIn<IdType> vertexID, // (input) candidate index
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WholeArrayIn<IdType> mergeArcs, // (input) merge arcs
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WholeArrayIn<IdType> regularToCritical, // (input)
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FieldOut<IdType> sortVector); // (output)
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typedef _4 ExecutionSignature(_1, _2, _3);
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typedef _1 InputDomain;
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// Constructor
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VTKM_EXEC_CONT
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RegularToCriticalDown() {}
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template <typename InFieldPortalType>
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VTKM_EXEC
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vtkm::Id operator()(const vtkm::Id& vertexID,
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const InFieldPortalType& mergeArcs,
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const InFieldPortalType& regularToCritical) const
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{
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vtkm::Id sortVector;
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// copy the mergeArc ID
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vtkm::Id splitNeighbour = mergeArcs.Get(vertexID);
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// if it's the root vertex
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if (splitNeighbour == NO_VERTEX_ASSIGNED)
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// set it to the sentinel value
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sortVector = NO_VERTEX_ASSIGNED;
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else
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// otherwise convert to a candidate ID & save
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sortVector = regularToCritical.Get(splitNeighbour);
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return sortVector;
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}
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}; // RegularToCriticalDown
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}
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}
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}
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#endif
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