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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2022-2024 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
#include "cellEdgeAddressing.H"
#include "polyDistributionMap.H"
#include "polyTopoChangeMap.H"
#include "polyMeshMap.H"
#include "HashList.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
// An edge hash functor that is much faster than Hash<edge>, but is also more
// prone to collisions
struct QuickHashEdge
{
unsigned operator()(const edge& e)
{
return e[0]*e[1];
}
};
// An invalid null edge for unset entries in the edge map
template<>
const edge HashList<label, edge, QuickHashEdge>::nullKey(-labelMax, -labelMax);
// Workspace for addressing calculations
struct cellEdgeAddressingWorkspace
{
HashList<label, edge, QuickHashEdge> edgeToCei;
DynamicList<label> cfei0;
cellEdgeAddressingWorkspace()
:
edgeToCei(0),
cfei0()
{
resizeAndClear(6, 12);
}
void resizeAndClear(const label nCellFaces, const label nCellEdges)
{
edgeToCei.resizeAndClear(nCellEdges*6);
cfei0.resize(nCellFaces);
cfei0 = -1;
}
}
workspace_;
}
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::cellEdgeAddressingData::cellEdgeAddressingData
(
const cell& c,
const faceList& fs,
const bool cOwnsFirst
)
{
// Allocate and initialise the addressing
cfiAndFeiToCei_.resize(UIndirectList<face>(fs, c));
ceiToCfiAndFei_ =
List<Pair<labelPair>>
(
cfiAndFeiToCei_.m().size()/2,
Pair<labelPair>(labelPair(-1, -1), labelPair(-1, -1))
);
// Resize and reset the workspace
workspace_.resizeAndClear(c.size(), ceiToCfiAndFei_.size());
// Construct a map to enumerate the cell edges
{
label cellEdgei = 0;
forAll(c, cfi)
{
const face& f = fs[c[cfi]];
forAll(f, fei)
{
cellEdgei +=
workspace_.edgeToCei.insert(f.faceEdge(fei), cellEdgei);
}
}
}
// Copy data out of the map into the addressing
forAll(c, cfi)
{
const face& f = fs[c[cfi]];
cfiAndFeiToCei_[cfi] = -1;
forAll(f, fei)
{
const label cei = workspace_.edgeToCei[f.faceEdge(fei)];
cfiAndFeiToCei_[cfi][fei] = cei;
ceiToCfiAndFei_[cei]
[
ceiToCfiAndFei_[cei][0] != labelPair(-1, -1)
] = {cfi, fei};
}
}
// Allocate and initialise the face ownership
cOwns_ = boolList(c.size(), false);
cOwns_[0] = cOwnsFirst;
workspace_.cfei0[0] = 0;
// Walk around the cell, comparing edges to determine face ownership
{
label cfi = 0, fei = 0;
do
{
// Get the adjacent face and face-edge (given subscript j)
const label cei = cfiAndFeiToCei_[cfi][fei];
const labelPair cfiAndFei(labelPair(cfi, fei));
const labelPair& cfjAndFej =
ceiToCfiAndFei_[cei][ceiToCfiAndFei_[cei][0] == cfiAndFei];
const label cfj = cfjAndFej[0], fej = cfjAndFej[1];
// If the adjacent face has not been visited then set its ownership
// and its starting face edge and move forwards into it
if (workspace_.cfei0[cfj] == -1)
{
// If the face-edges point in different directions then the
// faces have the same owner. If they point in the same
// direction then they have different owners.
const label sign =
edge::compare
(
fs[c[cfi]].faceEdge(fei),
fs[c[cfj]].faceEdge(fej)
);
cOwns_[cfj] = sign < 0 ? cOwns_[cfi] : !cOwns_[cfi];
workspace_.cfei0[cfj] = fej;
cfi = cfj;
fei = (fej + 1) % fs[c[cfj]].size();
}
// If the adjacent face has been visited, and we are not back at
// the starting edge of this face, then move to the next edge of
// this face
else if (fei != workspace_.cfei0[cfi])
{
fei = (fei + 1) % fs[c[cfi]].size();
}
// If we are back at the first edge then this face is complete, so
// move backwards into the adjacent face
else // if (fei == workspace_.cfei0[cfi])
{
cfi = cfj;
fei = fej;
}
}
while (cfi != 0 || fei != 0);
}
}
Foam::cellEdgeAddressingList::cellEdgeAddressingList(const polyMesh& mesh)
:
DemandDrivenMeshObject
<
polyMesh,
TopoChangeableMeshObject,
cellEdgeAddressingList
>(mesh),
list_(mesh.nCells())
{}
// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
bool Foam::cellEdgeAddressingList::movePoints()
{
return true;
}
void Foam::cellEdgeAddressingList::distribute(const polyDistributionMap& map)
{
// We could be more selective here and try to keep addressing for cells
// that haven't changed
list_.clear();
list_.resize(map.mesh().nCells());
}
void Foam::cellEdgeAddressingList::topoChange(const polyTopoChangeMap& map)
{
// We could be more selective here and try to keep addressing for cells
// that haven't changed
list_.clear();
list_.resize(map.mesh().nCells());
}
void Foam::cellEdgeAddressingList::mapMesh(const polyMeshMap& map)
{
list_.clear();
list_.resize(map.mesh().nCells());
}
// ************************************************************************* //
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