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https://gitlab.kitware.com/vtk/vtk-m
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134 lines
5.9 KiB
C++
134 lines
5.9 KiB
C++
//============================================================================
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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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//
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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 (c) 2018, The Regents of the University of California, through
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// Lawrence Berkeley National Laboratory (subject to receipt of any required approvals
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// from the U.S. Dept. of Energy). All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// (1) Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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//
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// (2) Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// (3) Neither the name of the University of California, Lawrence Berkeley National
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// Laboratory, U.S. Dept. of Energy nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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// OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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//=============================================================================
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//
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// This code is an extension of the algorithm presented in the paper:
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// Parallel Peak Pruning for Scalable SMP Contour Tree Computation.
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// Hamish Carr, Gunther Weber, Christopher Sewell, and James Ahrens.
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// Proceedings of the IEEE Symposium on Large Data Analysis and Visualization
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// (LDAV), October 2016, Baltimore, Maryland.
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//
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// The PPP2 algorithm and software were jointly developed by
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// Hamish Carr (University of Leeds), Gunther H. Weber (LBNL), and
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// Oliver Ruebel (LBNL)
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//==============================================================================
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#ifndef vtk_m_worklet_contourtree_augmented_active_graph_set_hyper_arcs_worklet_h
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#define vtk_m_worklet_contourtree_augmented_active_graph_set_hyper_arcs_worklet_h
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#include <vtkm/worklet/WorkletMapField.h>
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#include <vtkm/worklet/contourtree_augmented/Types.h>
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namespace vtkm
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{
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namespace worklet
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{
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namespace contourtree_augmented
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{
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namespace active_graph_inc
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{
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// Worklet for computing the sort indices from the sort order
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class SetHyperArcsWorklet : public vtkm::worklet::WorkletMapField
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{
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public:
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typedef void ControlSignature(
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WholeArrayInOut treeHypernodes, // (input/output) hypernodes of the tree
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WholeArrayOut treeHyperarcs, // (output) tree hyperarcs
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WholeArrayIn graphHyperarcs, // (input) hyperarcs from the portal
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WholeArrayIn graphSuperID); // (input) active graph superID
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typedef void ExecutionSignature(_1, InputIndex, _2, _3, _4);
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using InputDomain = _1;
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// Default Constructor
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VTKM_EXEC_CONT
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SetHyperArcsWorklet() {}
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template <typename InFieldPortalType, typename InOutFieldPortalType, typename OutFieldPortalType>
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VTKM_EXEC void operator()(const InOutFieldPortalType& treeHypernodesPortal,
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const vtkm::Id hypernode,
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const OutFieldPortalType treeHyperarcsPortal,
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const InFieldPortalType& graphHyperarcsPortal,
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const InFieldPortalType& graphSuperIDPortal) const
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{
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// reset the hypernode ID to a supernode ID from a graph ID
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vtkm::Id graphID = treeHypernodesPortal.Get(hypernode);
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treeHypernodesPortal.Set(hypernode, graphSuperIDPortal.Get(graphID));
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// now retrieve the hyperarc destination
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vtkm::Id graphTarget = graphHyperarcsPortal.Get(graphID);
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// if it's the global minimum, copy
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if (NoSuchElement(graphTarget))
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treeHyperarcsPortal.Set(hypernode, (vtkm::Id)NO_SUCH_ELEMENT);
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// otherwise, look up the correct supernode ID
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else
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treeHyperarcsPortal.Set(hypernode, graphSuperIDPortal.Get(MaskedIndex(graphTarget)));
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// and reset the hypernode ID to a supernode ID
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// In serial this worklet implements the following operation
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/*
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for (indexType hypernode = 0; hypernode < nHypernodes; hypernode++)
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{ // per hypernode
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// reset the hypernode ID to a supernode ID from a graph ID
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indexType graphID = tree.hypernodes[hypernode];
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tree.hypernodes[hypernode] = superID[graphID];
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// now retrieve the hyperarc destination
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indexType graphTarget = hyperarcs[graphID];
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// if it's the global minimum, copy
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if (NoSuchElement(graphTarget))
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tree.hyperarcs[hypernode] = NO_SUCH_ELEMENT;
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// otherwise, look up the correct supernode ID
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else
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tree.hyperarcs[hypernode] = superID[MaskedIndex(graphTarget)];
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// and reset the hypernode ID to a supernode ID
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} // per hypernode
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*/
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}
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}; // SetHyperArcsWorklet
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} // namespace active_graph_inc
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} // namespace contourtree_augmented
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} // namespace worklet
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} // namespace vtkm
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#endif
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