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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2022-2026 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 "cutPolyIsoSurface.H"
#include "cellEdgeAddressing.H"
#include "cutPolyValue.H"
#include "EdgeMap.H"
#include "cpuTime.H"
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
namespace Foam
{
defineTypeNameAndDebug(cutPolyIsoSurface, 0);
}
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::cutPolyIsoSurface::cutPolyIsoSurface
(
const polyMesh& mesh,
const scalarField& pAlphas,
const scalar isoAlpha,
const labelUList& cells
)
:
points_(),
pointEdges_(),
pointEdgeLambdas_(),
faces_(),
faceCells_()
{
cpuTime cpuTime;
// Cut the faces
List<List<labelPair>> faceCuts(mesh.faces().size());
forAll(mesh.faces(), facei)
{
faceCuts[facei] =
cutPoly::faceCuts
(
mesh.faces()[facei],
pAlphas,
isoAlpha
);
}
// Request the cell-edge addressing engine
const cellEdgeAddressingList& cAddrs = cellEdgeAddressingList::New(mesh);
// Cut the cells
List<labelListList> cellCuts(mesh.cells().size());
label nCutCells = 0;
auto cutCell = [&](const label celli)
{
cellCuts[celli] =
cutPoly::cellCuts
(
mesh.cells()[celli],
cAddrs[celli],
mesh.faces(),
faceCuts,
pAlphas,
isoAlpha
);
nCutCells += !cellCuts[celli].empty();
};
if (notNull(cells))
{
forAll(cells, i)
{
cutCell(cells[i]);
}
}
else
{
forAll(mesh.cells(), celli)
{
cutCell(celli);
}
}
// Generate the cell cut polygons
const label nAllocate = nCutCells + nCutCells/10;
EdgeMap<label> meshEdgePoint(nAllocate*4);
DynamicList<point> pointsDyn(nAllocate);
DynamicList<edge> pointEdgesDyn(nAllocate);
DynamicList<scalar> pointEdgeLambdasDyn(nAllocate);
DynamicList<face> facesDyn(nAllocate);
DynamicList<label> faceCellsDyn(nAllocate);
forAll(mesh.cells(), celli)
{
forAll(cellCuts[celli], cellCuti)
{
if (cellCuts[celli][cellCuti].size() < 3) continue;
facesDyn.append(face(cellCuts[celli][cellCuti].size()));
forAll(cellCuts[celli][cellCuti], i)
{
const label cei = cellCuts[celli][cellCuti][i];
const label cfi = cAddrs[celli].ceiToCfiAndFei()[cei][0][0];
const label fei = cAddrs[celli].ceiToCfiAndFei()[cei][0][1];
const edge e =
mesh.faces()[mesh.cells()[celli][cfi]].faceEdge(fei);
EdgeMap<label>::iterator iter = meshEdgePoint.find(e);
const label surfacePointi =
iter != meshEdgePoint.end() ? *iter : pointsDyn.size();
if (surfacePointi == pointsDyn.size())
{
meshEdgePoint.insert(e, surfacePointi);
const scalar lambda =
cutPoly::edgeCutLambda(e, pAlphas, isoAlpha);
pointsDyn.append
(
cutPoly::edgeCutValue(e, lambda, mesh.points())
);
pointEdgesDyn.append(e);
pointEdgeLambdasDyn.append(lambda);
}
facesDyn.last()[i] = surfacePointi;
}
faceCellsDyn.append(celli);
}
}
// Transfer to non-dynamic storage
points_.transfer(pointsDyn);
pointEdges_.transfer(pointEdgesDyn);
pointEdgeLambdas_.transfer(pointEdgeLambdasDyn);
faces_.transfer(facesDyn);
faceCells_.transfer(faceCellsDyn);
if (debug)
{
const label nLabels =
sum(ListListOps::subSizes(faces(), accessOp()));
Pout<< typeName << " : constructed surface of size "
<< points().size()*sizeof(point) + nLabels*sizeof(label)
<< " in " << cpuTime.cpuTimeIncrement() << "s" << nl << endl;
}
}
Foam::cutPolyIsoSurface::cutPolyIsoSurface
(
const PtrList<cutPolyIsoSurface>& isos
)
:
points_(),
pointEdges_(),
pointEdgeLambdas_(),
faces_(),
faceCells_()
{
label nPoints = 0, nFaces = 0;
forAll(isos, i)
{
nPoints += isos[i].points_.size();
nFaces += isos[i].faces_.size();
}
points_.resize(nPoints);
pointEdges_.resize(nPoints);
pointEdgeLambdas_.resize(nPoints);
faces_.resize(nFaces);
faceCells_.resize(nFaces);
label pointi0 = 0, facei0 = 0;
forAll(isos, i)
{
const label nPs = isos[i].points_.size();
const label nFs = isos[i].faces_.size();
SubList<point>(points_, nPs, pointi0) = isos[i].points_;
SubList<edge>(pointEdges_, nPs, pointi0) = isos[i].pointEdges_;
SubList<scalar>(pointEdgeLambdas_, nPs, pointi0) =
isos[i].pointEdgeLambdas_;
SubList<face>(faces_, nFs, facei0) = isos[i].faces_;
SubList<label>(faceCells_, nFs, facei0) = isos[i].faceCells_;
forAll(isos[i].faces_, fi)
{
forAll(faces_[facei0 + fi], fpi)
{
faces_[facei0 + fi][fpi] += pointi0;
}
}
pointi0 += nPs;
facei0 += nFs;
}
}
// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
Foam::cutPolyIsoSurface::~cutPolyIsoSurface()
{}
// ************************************************************************* //
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