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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2026 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 "boundaryRandom.H"
#include "sampledSet.H"
#include "DynamicList.H"
#include "polyMesh.H"
#include "addToRunTimeSelectionTable.H"
#include "word.H"
#include "randomGenerator.H"
#include "SubField.H"
#include "barycentric2D.H"
#include "triPointRef.H"
#include "tetIndices.H"
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
namespace Foam
{
namespace sampledSets
{
defineTypeNameAndDebug(boundaryRandom, 0);
addToRunTimeSelectionTable(sampledSet, boundaryRandom, word);
}
}
// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
bool Foam::sampledSets::boundaryRandom::calcSamples
(
DynamicList<point>& samplingPositions,
DynamicList<scalar>&,
DynamicList<label>& samplingSegments,
DynamicList<label>& samplingCells,
DynamicList<label>& samplingFaces
) const
{
// Get the patch IDs
const labelList patchIDs(mesh().boundary().patchSet(patches_).toc());
// Triangulate the patch faces
DynamicList<label> triFaces, triTetPts;
forAll(patchIDs, patchi)
{
const polyPatch& patch = mesh().boundary()[patchIDs[patchi]];
forAll(patch, patchFacei)
{
const face& f = patch[patchFacei];
const label facei = patchFacei + patch.start();
for (label tetPti = 1; tetPti < f.size() - 1; ++ tetPti)
{
triFaces.append(facei);
triTetPts.append(tetPti);
}
}
}
// Generate the fractions which select the processor, patch and triangle
scalarField trisFraction(triFaces.size() + 1, 0);
forAll(triFaces, trii)
{
const tetIndices tetIs
(
mesh().faceOwner()[triFaces[trii]],
triFaces[trii],
triTetPts[trii]
);
trisFraction[trii + 1] =
trisFraction[trii] + tetIs.faceTri(mesh()).mag();
}
scalarField procsFraction(Pstream::nProcs() + 1, 0);
{
scalarField procsArea(Pstream::nProcs(), 0);
procsArea[Pstream::myProcNo()] = trisFraction.last();
Pstream::listCombineGather(procsArea, maxEqOp());
Pstream::listCombineScatter(procsArea);
for(label proci = 0; proci < Pstream::nProcs(); ++ proci)
{
procsFraction[proci + 1] = procsFraction[proci] + procsArea[proci];
}
}
if (triFaces.size())
{
trisFraction /= trisFraction.last();
}
if (procsFraction.last() != 0)
{
procsFraction /= procsFraction.last();
}
// Generate the samples
randomGenerator rndGen(261782, true);
const label proci = Pstream::myProcNo();
for (label i = 0; i < nPoints_; ++ i)
{
// Request all random numbers simultaneously on all processors so that
// the generator state stays consistent
const scalar rProc = rndGen.scalar01();
const scalar rTri = rndGen.scalar01();
const barycentric2D r2D = barycentric2D01(rndGen);
if (procsFraction[proci] < rProc && rProc <= procsFraction[proci + 1])
{
label trii = 0;
while (rTri > trisFraction[trii + 1])
{
++ trii;
}
const tetIndices tetIs
(
mesh().faceOwner()[triFaces[trii]],
triFaces[trii],
triTetPts[trii]
);
const barycentric r3D
(
rootSmall,
(1 - rootSmall)*r2D.a(),
(1 - rootSmall)*r2D.b(),
(1 - rootSmall)*r2D.c()
);
samplingPositions.append(tetIs.tet(mesh()).barycentricToPoint(r3D));
samplingSegments.append(i);
samplingCells.append(tetIs.cell());
samplingFaces.append(tetIs.face());
}
}
// This set is unordered. Distances have not been created.
return false;
}
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::sampledSets::boundaryRandom::boundaryRandom
(
const word& name,
const polyMesh& mesh,
const dictionary& dict
)
:
sampledSet(name, mesh, dict),
patches_(dict.lookup("patches")),
nPoints_(dict.lookup<label>("nPoints"))
{}
// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
Foam::sampledSets::boundaryRandom::~boundaryRandom()
{}
// ************************************************************************* //
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