mirror of
https://gitlab.kitware.com/vtk/vtk-m
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167 lines
6.9 KiB
C++
167 lines
6.9 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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// 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 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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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-NA0003525 with NTESS,
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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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// Copyright (c) 2016, Los Alamos National Security, LLC
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// All rights reserved.
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//
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// Copyright 2016. Los Alamos National Security, LLC.
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// This software was produced under U.S. Government contract DE-AC52-06NA25396
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// for Los Alamos National Laboratory (LANL), which is operated by
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// Los Alamos National Security, LLC for the U.S. Department of Energy.
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// The U.S. Government has rights to use, reproduce, and distribute this
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// software. NEITHER THE GOVERNMENT NOR LOS ALAMOS NATIONAL SECURITY, LLC
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// MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LIABILITY FOR THE
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// USE OF THIS SOFTWARE. If software is modified to produce derivative works,
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// such modified software should be clearly marked, so as not to confuse it
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// with the version available from LANL.
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//
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// Additionally, redistribution and use in source and binary forms, with or
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// without modification, are permitted provided that the following conditions
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// are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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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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// 3. Neither the name of Los Alamos National Security, LLC, Los Alamos
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// National Laboratory, LANL, the U.S. Government, nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY LOS ALAMOS NATIONAL SECURITY, LLC AND
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// CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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// BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL LOS ALAMOS
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// NATIONAL SECURITY, LLC OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//============================================================================
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#ifndef vtkm_worklet_cosmotools_mark_active_neighbors_h
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#define vtkm_worklet_cosmotools_mark_active_neighbors_h
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#include <vtkm/worklet/WorkletMapField.h>
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#include <vtkm/worklet/cosmotools/TagTypes.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 cosmotools
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{
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// Worklet for particles to indicate which neighbors are active
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// because at least one particle in that bin is within linking length
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template <typename T>
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class MarkActiveNeighbors : public vtkm::worklet::WorkletMapField
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{
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public:
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using ControlSignature =
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void(FieldIn index, // (input) particle index
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FieldIn partId, // (input) particle id sorted
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FieldIn binId, // (input) bin Id per particle
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WholeArrayIn partIdArray, // (input) sequence imposed on sorted particle Ids
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WholeArrayIn location, // (input) location of particles
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WholeArrayIn firstPartId, // (input) vector of first particle indices
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WholeArrayIn lastPartId, // (input) vector of last particle indices
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FieldOut flag); // (output) active bin neighbors mask
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using ExecutionSignature = _8(_1, _2, _3, _4, _5, _6, _7);
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using InputDomain = _1;
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vtkm::Id xNum, yNum, zNum;
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vtkm::Id NUM_NEIGHBORS;
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T linkLenSq;
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// Constructor
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VTKM_EXEC_CONT
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MarkActiveNeighbors(const vtkm::Id XNum,
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const vtkm::Id YNum,
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const vtkm::Id ZNum,
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const vtkm::Id NumNeighbors,
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const T LinkLen)
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: xNum(XNum)
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, yNum(YNum)
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, zNum(ZNum)
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, NUM_NEIGHBORS(NumNeighbors)
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, linkLenSq(LinkLen * LinkLen)
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{
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}
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template <typename InIdPortalType, typename InFieldPortalType, typename InVectorPortalType>
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VTKM_EXEC vtkm::UInt32 operator()(const vtkm::Id& i,
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const vtkm::Id& iPartId,
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const vtkm::Id& iBinId,
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const InIdPortalType& partIdArray,
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const InFieldPortalType& location,
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const InVectorPortalType& firstPartId,
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const InVectorPortalType& lastPartId) const
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{
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const vtkm::Id ybin = (iBinId / xNum) % yNum;
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const vtkm::Id zbin = iBinId / (xNum * yNum);
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vtkm::UInt32 activeFlag = 0;
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vtkm::UInt32 bcnt = 1;
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vtkm::Id cnt = 0;
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// Examine all neighbor bins surrounding this particle
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for (vtkm::Id z = zbin - 1; z <= zbin + 1; z++)
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{
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for (vtkm::Id y = ybin - 1; y <= ybin + 1; y++)
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{
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if ((y >= 0) && (y < yNum) && (z >= 0) && (z < zNum))
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{
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vtkm::Id pos = NUM_NEIGHBORS * i + cnt;
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vtkm::Id startParticle = firstPartId.Get(pos);
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vtkm::Id endParticle = lastPartId.Get(pos);
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// If the bin has any particles, check to see if any of those
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// are within the linking length from this particle
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for (vtkm::Id j = startParticle; j < endParticle; j++)
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{
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vtkm::Id jPartId = partIdArray.Get(j);
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vtkm::Vec<T, 3> iloc = location.Get(iPartId);
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vtkm::Vec<T, 3> jloc = location.Get(jPartId);
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T xDist = iloc[0] - jloc[0];
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T yDist = iloc[1] - jloc[1];
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T zDist = iloc[2] - jloc[2];
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// Found a particle within linking length so this bin is active
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if ((xDist * xDist + yDist * yDist + zDist * zDist) <= linkLenSq)
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{
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activeFlag = activeFlag | bcnt;
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break;
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}
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}
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}
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bcnt = bcnt << 1;
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cnt++;
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}
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}
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return activeFlag;
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}
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}; // MarkActiveNeighbors
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}
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}
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}
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#endif
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