mirror of
https://gitlab.kitware.com/vtk/vtk-m
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118 lines
4.9 KiB
C++
118 lines
4.9 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) 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_compute_potential_mxn_h
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#define vtkm_worklet_cosmotools_compute_potential_mxn_h
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#include <vtkm/worklet/WorkletMapField.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 computing the exact potential for all particles in range vs all particles in system
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template <typename T>
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class ComputePotentialMxN : public vtkm::worklet::WorkletMapField
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{
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public:
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using TagType = vtkm::List<T>;
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using ControlSignature = void(FieldIn index, // (input) index into particles for one bin
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WholeArrayIn partId, // (input) original particle id
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WholeArrayIn xLoc, // (input) x location in domain
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WholeArrayIn yLoc, // (input) y location in domain
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WholeArrayIn zLoc, // (input) z location in domain
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FieldOut potential); // (output) bin ID
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using ExecutionSignature = _6(_1, _2, _3, _4, _5);
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using InputDomain = _1;
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vtkm::Id nParticles; // Number of particles in halo
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T mass; // Particle mass
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// Constructor
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VTKM_EXEC_CONT
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ComputePotentialMxN(vtkm::Id N, T Mass)
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: nParticles(N)
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, mass(Mass)
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{
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}
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template <typename InIdPortalType, typename InFieldPortalType>
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VTKM_EXEC T operator()(const vtkm::Id& i,
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const InIdPortalType& partId,
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const InFieldPortalType& xLoc,
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const InFieldPortalType& yLoc,
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const InFieldPortalType& zLoc) const
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{
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T potential = 0.0f;
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vtkm::Id iPartId = partId.Get(i);
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for (vtkm::Id j = 0; j < nParticles; j++)
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{
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T xDist = xLoc.Get(iPartId) - xLoc.Get(j);
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T yDist = yLoc.Get(iPartId) - yLoc.Get(j);
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T zDist = zLoc.Get(iPartId) - zLoc.Get(j);
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T r = sqrt((xDist * xDist) + (yDist * yDist) + (zDist * zDist));
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if (fabs(r) > 0.00000000001f)
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{
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potential -= mass / r;
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}
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}
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return potential;
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}
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}; // ComputePotentialMxN
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}
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}
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}
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#endif
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