mirror of
https://github.com/OpenFOAM/OpenFOAM-6.git
synced 2025-12-08 06:57:46 +00:00
523 lines
14 KiB
C
523 lines
14 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 | Copyright (C) 2011-2018 OpenFOAM Foundation
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\\/ M anipulation |
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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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surfaceFeatureExtract
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Description
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Extracts and writes surface features to file. All but the basic feature
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extraction is WIP.
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\*---------------------------------------------------------------------------*/
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#include "surfaceFeatureExtract.H"
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#include "Time.H"
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#include "meshTools.H"
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#include "tensor2D.H"
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#include "symmTensor2D.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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const Foam::scalar Foam::internalAngleTolerance(80);
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const Foam::scalar Foam::internalToleranceCosAngle
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(
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cos(degToRad(180 - internalAngleTolerance))
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);
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const Foam::scalar Foam::externalAngleTolerance(10);
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const Foam::scalar Foam::externalToleranceCosAngle
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(
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cos(degToRad(180 - externalAngleTolerance))
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);
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bool Foam::edgesConnected(const edge& e1, const edge& e2)
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{
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if
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(
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e1.start() == e2.start()
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|| e1.start() == e2.end()
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|| e1.end() == e2.start()
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|| e1.end() == e2.end()
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)
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{
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return true;
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}
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return false;
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}
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Foam::scalar Foam::calcProximityOfFeaturePoints
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(
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const List<pointIndexHit>& hitList,
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const scalar defaultCellSize
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)
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{
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scalar minDist = defaultCellSize;
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for
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(
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label hI1 = 0;
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hI1 < hitList.size() - 1;
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++hI1
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)
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{
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const pointIndexHit& pHit1 = hitList[hI1];
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if (pHit1.hit())
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{
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for
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(
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label hI2 = hI1 + 1;
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hI2 < hitList.size();
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++hI2
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)
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{
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const pointIndexHit& pHit2 = hitList[hI2];
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if (pHit2.hit())
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{
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scalar curDist = mag(pHit1.hitPoint() - pHit2.hitPoint());
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minDist = min(curDist, minDist);
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}
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}
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}
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}
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return minDist;
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}
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Foam::scalar Foam::calcProximityOfFeatureEdges
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(
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const extendedFeatureEdgeMesh& efem,
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const List<pointIndexHit>& hitList,
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const scalar defaultCellSize
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)
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{
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scalar minDist = defaultCellSize;
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for
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(
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label hI1 = 0;
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hI1 < hitList.size() - 1;
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++hI1
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)
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{
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const pointIndexHit& pHit1 = hitList[hI1];
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if (pHit1.hit())
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{
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const edge& e1 = efem.edges()[pHit1.index()];
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for
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(
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label hI2 = hI1 + 1;
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hI2 < hitList.size();
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++hI2
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)
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{
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const pointIndexHit& pHit2 = hitList[hI2];
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if (pHit2.hit())
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{
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const edge& e2 = efem.edges()[pHit2.index()];
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// Don't refine if the edges are connected to each other
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if (!edgesConnected(e1, e2))
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{
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scalar curDist =
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mag(pHit1.hitPoint() - pHit2.hitPoint());
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minDist = min(curDist, minDist);
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}
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}
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}
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}
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}
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return minDist;
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}
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void Foam::deleteBox
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(
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const triSurface& surf,
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const treeBoundBox& bb,
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const bool removeInside,
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List<surfaceFeatures::edgeStatus>& edgeStat
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)
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{
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forAll(edgeStat, edgeI)
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{
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const point eMid = surf.edges()[edgeI].centre(surf.localPoints());
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if (removeInside ? bb.contains(eMid) : !bb.contains(eMid))
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{
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edgeStat[edgeI] = surfaceFeatures::NONE;
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}
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}
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}
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bool Foam::onLine(const point& p, const linePointRef& line)
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{
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const point& a = line.start();
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const point& b = line.end();
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if
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(
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( p.x() < min(a.x(), b.x()) || p.x() > max(a.x(), b.x()) )
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|| ( p.y() < min(a.y(), b.y()) || p.y() > max(a.y(), b.y()) )
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|| ( p.z() < min(a.z(), b.z()) || p.z() > max(a.z(), b.z()) )
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)
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{
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return false;
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}
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return true;
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}
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void Foam::deleteEdges
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(
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const triSurface& surf,
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const plane& cutPlane,
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List<surfaceFeatures::edgeStatus>& edgeStat
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)
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{
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const pointField& points = surf.points();
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const labelList& meshPoints = surf.meshPoints();
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forAll(edgeStat, edgeI)
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{
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const edge& e = surf.edges()[edgeI];
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const point& p0 = points[meshPoints[e.start()]];
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const point& p1 = points[meshPoints[e.end()]];
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const linePointRef line(p0, p1);
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// If edge does not intersect the plane, delete.
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scalar intersect = cutPlane.lineIntersect(line);
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point featPoint = intersect * (p1 - p0) + p0;
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if (!onLine(featPoint, line))
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{
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edgeStat[edgeI] = surfaceFeatures::NONE;
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}
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}
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}
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void Foam::drawHitProblem
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(
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const label fi,
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const triSurface& surf,
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const point& start,
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const point& p,
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const point& end,
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const List<pointIndexHit>& hitInfo
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)
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{
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Info<< nl << "# findLineAll did not hit its own face."
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<< nl << "# fi " << fi
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<< nl << "# start " << start
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<< nl << "# point " << p
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<< nl << "# end " << end
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<< nl << "# hitInfo " << hitInfo
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<< endl;
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meshTools::writeOBJ(Info, start);
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meshTools::writeOBJ(Info, p);
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meshTools::writeOBJ(Info, end);
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Info<< "l 1 2 3" << endl;
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meshTools::writeOBJ(Info, surf.points()[surf[fi][0]]);
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meshTools::writeOBJ(Info, surf.points()[surf[fi][1]]);
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meshTools::writeOBJ(Info, surf.points()[surf[fi][2]]);
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Info<< "f 4 5 6" << endl;
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forAll(hitInfo, hI)
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{
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label hFI = hitInfo[hI].index();
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meshTools::writeOBJ(Info, surf.points()[surf[hFI][0]]);
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meshTools::writeOBJ(Info, surf.points()[surf[hFI][1]]);
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meshTools::writeOBJ(Info, surf.points()[surf[hFI][2]]);
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Info<< "f "
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<< 3*hI + 7 << " "
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<< 3*hI + 8 << " "
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<< 3*hI + 9
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<< endl;
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}
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}
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void Foam::unmarkBaffles
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(
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const triSurface& surf,
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const scalar includedAngle,
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List<surfaceFeatures::edgeStatus>& edgeStat
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)
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{
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scalar minCos = Foam::cos(degToRad(180.0 - includedAngle));
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const labelListList& edgeFaces = surf.edgeFaces();
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forAll(edgeFaces, edgeI)
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{
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const labelList& eFaces = edgeFaces[edgeI];
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if (eFaces.size() > 2)
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{
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label i0 = eFaces[0];
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//const labelledTri& f0 = surf[i0];
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const Foam::vector& n0 = surf.faceNormals()[i0];
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//Pout<< "edge:" << edgeI << " n0:" << n0 << endl;
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bool same = true;
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for (label i = 1; i < eFaces.size(); i++)
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{
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//const labelledTri& f = surf[i];
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const Foam::vector& n = surf.faceNormals()[eFaces[i]];
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//Pout<< " mag(n&n0): " << mag(n&n0) << endl;
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if (mag(n&n0) < minCos)
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{
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same = false;
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break;
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}
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}
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if (same)
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{
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edgeStat[edgeI] = surfaceFeatures::NONE;
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}
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}
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}
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}
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Foam::surfaceFeatures::edgeStatus Foam::checkFlatRegionEdge
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(
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const triSurface& surf,
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const scalar tol,
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const scalar includedAngle,
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const label edgeI
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)
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{
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const edge& e = surf.edges()[edgeI];
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const labelList& eFaces = surf.edgeFaces()[edgeI];
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// Bin according to normal
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DynamicList<Foam::vector> normals(2);
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DynamicList<labelList> bins(2);
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forAll(eFaces, eFacei)
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{
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const Foam::vector& n = surf.faceNormals()[eFaces[eFacei]];
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// Find the normal in normals
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label index = -1;
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forAll(normals, normalI)
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{
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if (mag(n&normals[normalI]) > (1-tol))
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{
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index = normalI;
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break;
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}
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}
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if (index != -1)
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{
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bins[index].append(eFacei);
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}
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else if (normals.size() >= 2)
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{
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// Would be third normal. Mark as feature.
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//Pout<< "** at edge:" << surf.localPoints()[e[0]]
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// << surf.localPoints()[e[1]]
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// << " have normals:" << normals
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// << " and " << n << endl;
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return surfaceFeatures::REGION;
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}
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else
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{
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normals.append(n);
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bins.append(labelList(1, eFacei));
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}
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}
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// Check resulting number of bins
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if (bins.size() == 1)
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{
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// Note: should check here whether they are two sets of faces
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// that are planar or indeed 4 faces al coming together at an edge.
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//Pout<< "** at edge:"
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// << surf.localPoints()[e[0]]
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// << surf.localPoints()[e[1]]
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// << " have single normal:" << normals[0]
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// << endl;
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return surfaceFeatures::NONE;
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}
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else
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{
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// Two bins. Check if normals make an angle
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//Pout<< "** at edge:"
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// << surf.localPoints()[e[0]]
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// << surf.localPoints()[e[1]] << nl
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// << " normals:" << normals << nl
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// << " bins :" << bins << nl
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// << endl;
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if (includedAngle >= 0)
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{
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scalar minCos = Foam::cos(degToRad(180.0 - includedAngle));
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forAll(eFaces, i)
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{
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const Foam::vector& ni = surf.faceNormals()[eFaces[i]];
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for (label j=i+1; j<eFaces.size(); j++)
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{
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const Foam::vector& nj = surf.faceNormals()[eFaces[j]];
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if (mag(ni & nj) < minCos)
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{
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//Pout<< "have sharp feature between normal:" << ni
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// << " and " << nj << endl;
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// Is feature. Keep as region or convert to
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// feature angle? For now keep as region.
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return surfaceFeatures::REGION;
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}
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}
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}
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}
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// So now we have two normals bins but need to make sure both
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// bins have the same regions in it.
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// 1. store + or - region number depending
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// on orientation of triangle in bins[0]
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const labelList& bin0 = bins[0];
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labelList regionAndNormal(bin0.size());
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forAll(bin0, i)
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{
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const labelledTri& t = surf.localFaces()[eFaces[bin0[i]]];
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int dir = t.edgeDirection(e);
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if (dir > 0)
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{
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regionAndNormal[i] = t.region()+1;
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}
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else if (dir == 0)
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{
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FatalErrorInFunction
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<< exit(FatalError);
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}
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else
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{
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regionAndNormal[i] = -(t.region()+1);
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}
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}
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// 2. check against bin1
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const labelList& bin1 = bins[1];
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labelList regionAndNormal1(bin1.size());
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forAll(bin1, i)
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{
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const labelledTri& t = surf.localFaces()[eFaces[bin1[i]]];
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int dir = t.edgeDirection(e);
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label myRegionAndNormal;
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if (dir > 0)
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{
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myRegionAndNormal = t.region()+1;
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}
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else
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{
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myRegionAndNormal = -(t.region()+1);
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}
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regionAndNormal1[i] = myRegionAndNormal;
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label index = findIndex(regionAndNormal, -myRegionAndNormal);
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if (index == -1)
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{
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// Not found.
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//Pout<< "cannot find region " << myRegionAndNormal
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// << " in regions " << regionAndNormal << endl;
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return surfaceFeatures::REGION;
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}
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}
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// Passed all checks, two normal bins with the same contents.
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//Pout<< "regionAndNormal:" << regionAndNormal << endl;
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//Pout<< "myRegionAndNormal:" << regionAndNormal1 << endl;
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return surfaceFeatures::NONE;
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}
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}
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void Foam::writeStats(const extendedFeatureEdgeMesh& fem, Ostream& os)
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{
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os << " points : " << fem.points().size() << nl
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<< " of which" << nl
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<< " convex : "
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<< fem.concaveStart() << nl
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<< " concave : "
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<< (fem.mixedStart()-fem.concaveStart()) << nl
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<< " mixed : "
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<< (fem.nonFeatureStart()-fem.mixedStart()) << nl
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<< " non-feature : "
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<< (fem.points().size()-fem.nonFeatureStart()) << nl
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<< " edges : " << fem.edges().size() << nl
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<< " of which" << nl
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<< " external edges : "
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<< fem.internalStart() << nl
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<< " internal edges : "
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<< (fem.flatStart()- fem.internalStart()) << nl
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<< " flat edges : "
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<< (fem.openStart()- fem.flatStart()) << nl
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<< " open edges : "
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<< (fem.multipleStart()- fem.openStart()) << nl
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<< " multiply connected : "
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<< (fem.edges().size()- fem.multipleStart()) << endl;
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}
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// ************************************************************************* //
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