c9c85d9afe
It was only looking for faces that were used in both endpoints but not actually checking whether they were indeed an edge (== consecutive vertex) in all faces. So if one face had an additional crossing edge and another didn't it would find more edgeFaces than the proper 'primitiveMesh::edgeFaces()' routine. This occasionally happened inside snappyHexMesh (e.g. motorBike tutorial)
745 lines
20 KiB
C
745 lines
20 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | www.openfoam.com
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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Copyright (C) 2011-2017 OpenFOAM Foundation
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Copyright (C) 2016-2021 OpenCFD Ltd.
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Application
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modifyMesh
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Group
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grpMeshAdvancedUtilities
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Description
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Manipulate mesh elements.
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Actions are:
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(boundary)points:
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- move
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(boundary)edges:
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- split and move introduced point
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(boundary)faces:
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- split(triangulate) and move introduced point
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edges:
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- collapse
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cells:
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- split into polygonal base pyramids around newly introduced mid
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point
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Is a bit of a loose collection of mesh change drivers.
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\*---------------------------------------------------------------------------*/
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#include "argList.H"
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#include "Time.H"
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#include "polyMesh.H"
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#include "polyTopoChange.H"
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#include "mapPolyMesh.H"
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#include "boundaryCutter.H"
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#include "cellSplitter.H"
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#include "edgeCollapser.H"
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#include "meshTools.H"
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#include "Pair.H"
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#include "globalIndex.H"
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#include "topoSet.H"
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#include "processorMeshes.H"
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#include "IOdictionary.H"
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using namespace Foam;
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// Locate point on patch. Returns (mesh) point label.
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label findPoint(const primitivePatch& pp, const point& nearPoint)
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{
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const pointField& points = pp.points();
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const labelList& meshPoints = pp.meshPoints();
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// Find nearest and next nearest
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scalar minDistSqr = GREAT;
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label minI = -1;
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scalar almostMinDistSqr = GREAT;
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label almostMinI = -1;
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for (const label pointi : meshPoints)
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{
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scalar distSqr = magSqr(nearPoint - points[pointi]);
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if (distSqr < minDistSqr)
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{
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almostMinDistSqr = minDistSqr;
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almostMinI = minI;
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minDistSqr = distSqr;
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minI = pointi;
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}
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else if (distSqr < almostMinDistSqr)
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{
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almostMinDistSqr = distSqr;
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almostMinI = pointi;
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}
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}
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// Decide if nearPoint unique enough.
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Info<< "Found to point " << nearPoint << nl
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<< " nearest point : " << minI
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<< " distance " << Foam::sqrt(minDistSqr)
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<< " at " << points[minI] << nl
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<< " next nearest point : " << almostMinI
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<< " distance " << Foam::sqrt(almostMinDistSqr)
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<< " at " << points[almostMinI] << endl;
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if (almostMinDistSqr < 4*minDistSqr)
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{
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Info<< "Next nearest too close to nearest. Aborting" << endl;
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return -1;
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}
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else
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{
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return minI;
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}
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}
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// Locate edge on patch. Return mesh edge label.
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label findEdge
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(
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const primitiveMesh& mesh,
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const primitivePatch& pp,
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const point& nearPoint
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)
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{
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const pointField& localPoints = pp.localPoints();
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const pointField& points = pp.points();
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const labelList& meshPoints = pp.meshPoints();
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const edgeList& edges = pp.edges();
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// Find nearest and next nearest
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scalar minDist = GREAT;
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label minI = -1;
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scalar almostMinDist = GREAT;
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label almostMinI = -1;
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for (const edge& e : edges)
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{
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pointHit pHit(e.line(localPoints).nearestDist(nearPoint));
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if (pHit.hit())
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{
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if (pHit.distance() < minDist)
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{
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almostMinDist = minDist;
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almostMinI = minI;
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minDist = pHit.distance();
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minI = meshTools::findEdge
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(
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mesh,
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meshPoints[e[0]],
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meshPoints[e[1]]
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);
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}
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else if (pHit.distance() < almostMinDist)
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{
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almostMinDist = pHit.distance();
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almostMinI = meshTools::findEdge
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(
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mesh,
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meshPoints[e[0]],
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meshPoints[e[1]]
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);
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}
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}
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}
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if (minI == -1)
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{
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Info<< "Did not find edge close to point " << nearPoint << endl;
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return -1;
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}
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// Decide if nearPoint unique enough.
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Info<< "Found to point " << nearPoint << nl
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<< " nearest edge : " << minI
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<< " distance " << minDist << " endpoints "
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<< mesh.edges()[minI].line(points) << nl
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<< " next nearest edge : " << almostMinI
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<< " distance " << almostMinDist << " endpoints "
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<< mesh.edges()[almostMinI].line(points) << nl
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<< endl;
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if (almostMinDist < 2*minDist)
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{
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Info<< "Next nearest too close to nearest. Aborting" << endl;
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return -1;
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}
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else
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{
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return minI;
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}
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}
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// Find face on patch. Return mesh face label.
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label findFace
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(
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const primitiveMesh& mesh,
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const primitivePatch& pp,
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const point& nearPoint
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)
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{
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const pointField& points = pp.points();
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// Find nearest and next nearest
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scalar minDist = GREAT;
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label minI = -1;
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scalar almostMinDist = GREAT;
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label almostMinI = -1;
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forAll(pp, patchFacei)
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{
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pointHit pHit(pp[patchFacei].nearestPoint(nearPoint, points));
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if (pHit.hit())
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{
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if (pHit.distance() < minDist)
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{
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almostMinDist = minDist;
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almostMinI = minI;
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minDist = pHit.distance();
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minI = patchFacei + mesh.nInternalFaces();
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}
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else if (pHit.distance() < almostMinDist)
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{
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almostMinDist = pHit.distance();
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almostMinI = patchFacei + mesh.nInternalFaces();
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}
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}
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}
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if (minI == -1)
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{
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Info<< "Did not find face close to point " << nearPoint << endl;
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return -1;
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}
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// Decide if nearPoint unique enough.
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Info<< "Found to point " << nearPoint << nl
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<< " nearest face : " << minI
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<< " distance " << minDist
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<< " to face centre " << mesh.faceCentres()[minI] << nl
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<< " next nearest face : " << almostMinI
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<< " distance " << almostMinDist
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<< " to face centre " << mesh.faceCentres()[almostMinI] << nl
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<< endl;
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if (almostMinDist < 2*minDist)
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{
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Info<< "Next nearest too close to nearest. Aborting" << endl;
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return -1;
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}
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else
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{
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return minI;
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}
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}
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// Find cell with cell centre close to given point.
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label findCell(const primitiveMesh& mesh, const point& nearPoint)
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{
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label celli = mesh.findCell(nearPoint);
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if (celli != -1)
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{
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scalar distToCcSqr = magSqr(nearPoint - mesh.cellCentres()[celli]);
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const labelList& cPoints = mesh.cellPoints()[celli];
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label minI = -1;
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scalar minDistSqr = GREAT;
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for (const label pointi : cPoints)
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{
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scalar distSqr = magSqr(nearPoint - mesh.points()[pointi]);
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if (distSqr < minDistSqr)
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{
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minDistSqr = distSqr;
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minI = pointi;
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}
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}
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// Decide if nearPoint unique enough.
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Info<< "Found to point " << nearPoint << nl
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<< " nearest cell : " << celli
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<< " distance " << Foam::sqrt(distToCcSqr)
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<< " to cell centre " << mesh.cellCentres()[celli] << nl
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<< " nearest mesh point : " << minI
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<< " distance " << Foam::sqrt(minDistSqr)
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<< " to " << mesh.points()[minI] << nl
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<< endl;
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if (minDistSqr < 4*distToCcSqr)
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{
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Info<< "Mesh point too close to nearest cell centre. Aborting"
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<< endl;
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celli = -1;
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}
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}
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return celli;
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}
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int main(int argc, char *argv[])
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{
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argList::addNote
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(
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"Manipulate mesh elements.\n"
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"For example, moving points, splitting/collapsing edges etc."
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);
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#include "addOverwriteOption.H"
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argList::addOption("dict", "file", "Alternative modifyMeshDict");
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argList::noFunctionObjects(); // Never use function objects
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#include "setRootCase.H"
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#include "createTime.H"
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#include "createPolyMesh.H"
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const word oldInstance = mesh.pointsInstance();
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const bool overwrite = args.found("overwrite");
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Info<< "Reading modifyMeshDict\n" << endl;
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// Read meshing dictionary
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const word dictName("modifyMeshDict");
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#include "setSystemMeshDictionaryIO.H"
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const IOdictionary dict(dictIO);
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// Read all from the dictionary.
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List<Pair<point>> pointsToMove(dict.lookup("pointsToMove"));
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List<Pair<point>> edgesToSplit(dict.lookup("edgesToSplit"));
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List<Pair<point>> facesToTriangulate
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(
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dict.lookup("facesToTriangulate")
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);
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// Optional
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List<Pair<point>> facesToSplit;
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dict.readIfPresent("facesToSplit", facesToSplit);
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bool cutBoundary =
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(
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pointsToMove.size()
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|| edgesToSplit.size()
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|| facesToTriangulate.size()
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|| facesToSplit.size()
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);
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List<Pair<point>> edgesToCollapse(dict.lookup("edgesToCollapse"));
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bool collapseEdge = edgesToCollapse.size();
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List<Pair<point>> cellsToPyramidise(dict.lookup("cellsToSplit"));
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bool cellsToSplit = cellsToPyramidise.size();
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// List<Tuple2<pointField,point>>
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// cellsToCreate(dict.lookup("cellsToCreate"));
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Info<< "Read from " << dict.name() << nl
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<< " Boundary cutting module:" << nl
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<< " points to move :" << pointsToMove.size() << nl
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<< " edges to split :" << edgesToSplit.size() << nl
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<< " faces to split :" << facesToSplit.size() << nl
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<< " faces to triangulate:" << facesToTriangulate.size() << nl
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<< " Cell splitting module:" << nl
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<< " cells to split :" << cellsToPyramidise.size() << nl
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<< " Edge collapsing module:" << nl
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<< " edges to collapse :" << edgesToCollapse.size() << nl
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//<< " cells to create :" << cellsToCreate.size() << nl
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<< endl;
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if
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(
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(cutBoundary && collapseEdge)
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|| (cutBoundary && cellsToSplit)
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|| (collapseEdge && cellsToSplit)
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)
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{
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FatalErrorInFunction
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<< "Used more than one mesh modifying module "
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<< "(boundary cutting, cell splitting, edge collapsing)" << nl
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<< "Please do them in separate passes." << exit(FatalError);
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}
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// Get calculating engine for all of outside
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const SubList<face> outsideFaces
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(
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mesh.faces(),
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mesh.nBoundaryFaces(),
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mesh.nInternalFaces()
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);
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primitivePatch allBoundary(outsideFaces, mesh.points());
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// Look up mesh labels and convert to input for boundaryCutter.
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bool validInputs = true;
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Info<< nl << "Looking up points to move ..." << nl << endl;
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Map<point> pointToPos(pointsToMove.size());
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for (const Pair<point>& pts : pointsToMove)
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{
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const label pointi = findPoint(allBoundary, pts.first());
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if (pointi == -1 || !pointToPos.insert(pointi, pts.second()))
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{
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Info<< "Could not insert mesh point " << pointi
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<< " for input point " << pts.first() << nl
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<< "Perhaps the point is already marked for moving?" << endl;
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validInputs = false;
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}
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}
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Info<< nl << "Looking up edges to split ..." << nl << endl;
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Map<List<point>> edgeToCuts(edgesToSplit.size());
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for (const Pair<point>& pts : edgesToSplit)
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{
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label edgeI = findEdge(mesh, allBoundary, pts.first());
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if
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(
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edgeI == -1
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|| !edgeToCuts.insert(edgeI, List<point>(1, pts.second()))
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)
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{
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Info<< "Could not insert mesh edge " << edgeI
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<< " for input point " << pts.first() << nl
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<< "Perhaps the edge is already marked for cutting?" << endl;
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validInputs = false;
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}
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}
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|
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Info<< nl << "Looking up faces to triangulate ..." << nl << endl;
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Map<point> faceToDecompose(facesToTriangulate.size());
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for (const Pair<point>& pts : facesToTriangulate)
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{
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label facei = findFace(mesh, allBoundary, pts.first());
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if (facei == -1 || !faceToDecompose.insert(facei, pts.second()))
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{
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Info<< "Could not insert mesh face " << facei
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<< " for input point " << pts.first() << nl
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<< "Perhaps the face is already marked for splitting?" << endl;
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validInputs = false;
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}
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}
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|
|
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Info<< nl << "Looking up faces to split ..." << nl << endl;
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Map<labelPair> faceToSplit(facesToSplit.size());
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for (const Pair<point>& pts : facesToSplit)
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{
|
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label facei = findFace(mesh, allBoundary, pts.first());
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if (facei == -1)
|
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{
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Info<< "Could not insert mesh face " << facei
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<< " for input point " << pts.first() << nl
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<< "Perhaps the face is already marked for splitting?" << endl;
|
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|
validInputs = false;
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}
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else
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{
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// Find nearest points on face
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const primitivePatch pp
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(
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SubList<face>(mesh.faces(), 1, facei),
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mesh.points()
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);
|
|
|
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const label p0 = findPoint(pp, pts.first());
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const label p1 = findPoint(pp, pts.second());
|
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|
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const face& f = mesh.faces()[facei];
|
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|
|
if
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(
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p0 != -1
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&& p1 != -1
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&& faceToSplit.insert(facei, labelPair(f.find(p0), f.find(p1)))
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)
|
|
{}
|
|
else
|
|
{
|
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Info<< "Could not insert mesh face " << facei
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<< " for input coordinates " << pts
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<< " with vertices " << p0 << " and " << p1 << nl
|
|
<< "Perhaps the face is already marked for splitting?"
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<< endl;
|
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|
|
}
|
|
}
|
|
}
|
|
DebugVar(faceToSplit);
|
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|
|
|
|
Info<< nl << "Looking up cells to convert to pyramids around"
|
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<< " cell centre ..." << nl << endl;
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Map<point> cellToPyrCentre(cellsToPyramidise.size());
|
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for (const Pair<point>& pts : cellsToPyramidise)
|
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{
|
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label celli = findCell(mesh, pts.first());
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|
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if (celli == -1 || !cellToPyrCentre.insert(celli, pts.second()))
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{
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Info<< "Could not insert mesh cell " << celli
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<< " for input point " << pts.first() << nl
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<< "Perhaps the cell is already marked for splitting?" << endl;
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|
validInputs = false;
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}
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}
|
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|
|
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Info<< nl << "Looking up edges to collapse ..." << nl << endl;
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Map<point> edgeToPos(edgesToCollapse.size());
|
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for (const Pair<point>& pts : edgesToCollapse)
|
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{
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label edgeI = findEdge(mesh, allBoundary, pts.first());
|
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|
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if (edgeI == -1 || !edgeToPos.insert(edgeI, pts.second()))
|
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{
|
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Info<< "Could not insert mesh edge " << edgeI
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<< " for input point " << pts.first() << nl
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<< "Perhaps the edge is already marked for collaping?" << endl;
|
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|
|
validInputs = false;
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}
|
|
}
|
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|
|
|
|
|
|
if (!validInputs)
|
|
{
|
|
Info<< nl << "There was a problem in one of the inputs in the"
|
|
<< " dictionary. Not modifying mesh." << endl;
|
|
}
|
|
else if (cellToPyrCentre.size())
|
|
{
|
|
Info<< nl << "All input cells located. Modifying mesh." << endl;
|
|
|
|
// Mesh change engine
|
|
cellSplitter cutter(mesh);
|
|
|
|
// Topo change container
|
|
polyTopoChange meshMod(mesh);
|
|
|
|
// Insert commands into meshMod
|
|
cutter.setRefinement(cellToPyrCentre, meshMod);
|
|
|
|
// Do changes
|
|
autoPtr<mapPolyMesh> morphMap = meshMod.changeMesh(mesh, false);
|
|
|
|
if (morphMap().hasMotionPoints())
|
|
{
|
|
mesh.movePoints(morphMap().preMotionPoints());
|
|
}
|
|
|
|
cutter.updateMesh(morphMap());
|
|
|
|
if (!overwrite)
|
|
{
|
|
++runTime;
|
|
}
|
|
else
|
|
{
|
|
mesh.setInstance(oldInstance);
|
|
}
|
|
|
|
// Write resulting mesh
|
|
Info<< "Writing modified mesh to time " << runTime.timeName() << endl;
|
|
mesh.write();
|
|
topoSet::removeFiles(mesh);
|
|
processorMeshes::removeFiles(mesh);
|
|
}
|
|
else if (edgeToPos.size())
|
|
{
|
|
Info<< nl << "All input edges located. Modifying mesh." << endl;
|
|
|
|
// Mesh change engine
|
|
edgeCollapser cutter(mesh);
|
|
|
|
const edgeList& edges = mesh.edges();
|
|
const pointField& points = mesh.points();
|
|
|
|
pointField newPoints(points);
|
|
|
|
bitSet collapseEdge(mesh.nEdges());
|
|
Map<point> collapsePointToLocation(mesh.nPoints());
|
|
|
|
// Get new positions and construct collapse network
|
|
forAllConstIters(edgeToPos, iter)
|
|
{
|
|
label edgeI = iter.key();
|
|
const edge& e = edges[edgeI];
|
|
|
|
collapseEdge.set(edgeI);
|
|
collapsePointToLocation.set(e[1], points[e[0]]);
|
|
|
|
newPoints[e[0]] = iter.val();
|
|
}
|
|
|
|
// Move master point to destination.
|
|
mesh.movePoints(newPoints);
|
|
|
|
List<pointEdgeCollapse> allPointInfo;
|
|
const globalIndex globalPoints(mesh.nPoints());
|
|
labelList pointPriority(mesh.nPoints(), Zero);
|
|
|
|
cutter.consistentCollapse
|
|
(
|
|
globalPoints,
|
|
pointPriority,
|
|
collapsePointToLocation,
|
|
collapseEdge,
|
|
allPointInfo
|
|
);
|
|
|
|
// Topo change container
|
|
polyTopoChange meshMod(mesh);
|
|
|
|
// Insert
|
|
cutter.setRefinement(allPointInfo, meshMod);
|
|
|
|
// Do changes
|
|
autoPtr<mapPolyMesh> morphMap = meshMod.changeMesh(mesh, false);
|
|
|
|
if (morphMap().hasMotionPoints())
|
|
{
|
|
mesh.movePoints(morphMap().preMotionPoints());
|
|
}
|
|
|
|
// Not implemented yet:
|
|
//cutter.updateMesh(morphMap());
|
|
|
|
|
|
if (!overwrite)
|
|
{
|
|
++runTime;
|
|
}
|
|
else
|
|
{
|
|
mesh.setInstance(oldInstance);
|
|
}
|
|
|
|
// Write resulting mesh
|
|
Info<< "Writing modified mesh to time " << runTime.timeName() << endl;
|
|
mesh.write();
|
|
topoSet::removeFiles(mesh);
|
|
processorMeshes::removeFiles(mesh);
|
|
}
|
|
else
|
|
{
|
|
Info<< nl << "All input points located. Modifying mesh." << endl;
|
|
|
|
// Mesh change engine
|
|
boundaryCutter cutter(mesh);
|
|
|
|
// Topo change container
|
|
polyTopoChange meshMod(mesh);
|
|
|
|
// Insert commands into meshMod
|
|
cutter.setRefinement
|
|
(
|
|
pointToPos,
|
|
edgeToCuts,
|
|
faceToSplit, // Faces to split diagonally
|
|
faceToDecompose, // Faces to triangulate
|
|
meshMod
|
|
);
|
|
|
|
// Do changes
|
|
autoPtr<mapPolyMesh> morphMap = meshMod.changeMesh(mesh, false);
|
|
|
|
if (morphMap().hasMotionPoints())
|
|
{
|
|
mesh.movePoints(morphMap().preMotionPoints());
|
|
}
|
|
|
|
cutter.updateMesh(morphMap());
|
|
|
|
if (!overwrite)
|
|
{
|
|
++runTime;
|
|
}
|
|
else
|
|
{
|
|
mesh.setInstance(oldInstance);
|
|
}
|
|
|
|
// Write resulting mesh
|
|
Info<< "Writing modified mesh to time " << runTime.timeName() << endl;
|
|
mesh.write();
|
|
topoSet::removeFiles(mesh);
|
|
processorMeshes::removeFiles(mesh);
|
|
}
|
|
|
|
|
|
Info<< "\nEnd\n" << endl;
|
|
return 0;
|
|
}
|
|
|
|
|
|
// ************************************************************************* //
|