OpenLB
1.7
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src
particles
subgrid3DLegacyFramework
contactDetection
onGridContactDetectionHelper.h
Go to the documentation of this file.
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/* This file is part of the OpenLB library
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*
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* Copyright (C) 2021 Jan E. Marquardt
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* E-mail contact: info@openlb.net
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* The most recent release of OpenLB can be downloaded at
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* <http://www.openlb.net/>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <
utilities/omath.h
>
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#ifndef ONGRIDCONTACTDETECTION_H
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#define ONGRIDCONTACTDETECTION_H
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namespace
olb
{
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// Helps storing of 4 IDs (1 to 65534) in one uint64_t
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namespace
contact {
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// Necessary to shift particle IDs, since 0 should be the default value.
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void
storePid
(uint64_t& previous, uint16_t value)
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{
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previous = (previous << 16) + value + 1;
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}
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// Index starts at 0
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int
getPid
(
const
uint64_t& ids, uint16_t index)
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{
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return
((ids >> (index * 16)) & 0xffff) - 1;
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}
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}
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}
// namespace olb
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#endif
/*ONGRIDCONTACTDETECTION_H*/
olb::contact::storePid
void storePid(uint64_t &previous, uint16_t value)
Definition
onGridContactDetectionHelper.h:35
olb::contact::getPid
int getPid(const uint64_t &ids, uint16_t index)
Definition
onGridContactDetectionHelper.h:41
olb
Top level namespace for all of OpenLB.
Definition
boundaryPostProcessors2D.h:34
omath.h
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