131 lines
3.6 KiB
C++
131 lines
3.6 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.0
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend 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 the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License 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 foam-extend. If not, see <http://www.gnu.org/licenses/>.
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Description
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Finds nearest triangle and vertex.
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\*---------------------------------------------------------------------------*/
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#include "triSurface.H"
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#include "argList.H"
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#include "OFstream.H"
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#ifndef namespaceFoam
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#define namespaceFoam
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using namespace Foam;
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#endif
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// Main program:
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int main(int argc, char *argv[])
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{
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argList::noParallel();
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argList::validArgs.clear();
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argList::validOptions.insert("x", "X");
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argList::validOptions.insert("y", "Y");
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argList::validOptions.insert("z", "Z");
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argList::validArgs.append("surface file");
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argList args(argc, argv);
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point samplePt
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(
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args.optionRead<scalar>("x"),
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args.optionRead<scalar>("y"),
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args.optionRead<scalar>("z")
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);
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Info<< "Looking for nearest face/vertex to " << samplePt << endl;
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Info<< "Reading surf1 ..." << endl;
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triSurface surf1(args.additionalArgs()[0]);
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//
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// Nearest vertex
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//
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const pointField& localPoints = surf1.localPoints();
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label minIndex = -1;
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scalar minDist = GREAT;
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forAll(localPoints, pointI)
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{
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const scalar dist = mag(localPoints[pointI] - samplePt);
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if (dist < minDist)
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{
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minDist = dist;
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minIndex = pointI;
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}
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}
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Info<< "Nearest vertex:" << endl
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<< " index :" << minIndex << " (in localPoints)" << endl
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<< " index :" << surf1.meshPoints()[minIndex]
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<< " (in points)" << endl
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<< " coordinates:" << localPoints[minIndex] << endl
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<< endl;
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//
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// Nearest face
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//
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const pointField& points = surf1.points();
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minIndex = -1;
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minDist = GREAT;
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forAll(surf1, faceI)
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{
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const labelledTri& f = surf1[faceI];
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const point centre = f.centre(points);
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const scalar dist = mag(centre - samplePt);
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if (dist < minDist)
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{
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minDist = dist;
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minIndex = faceI;
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}
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}
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const labelledTri& f = surf1[minIndex];
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Info<< "Face with nearest centre:" << endl
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<< " index :" << minIndex << endl
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<< " centre :" << f.centre(points) << endl
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<< " face :" << f << endl
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<< " vertex coords:" << points[f[0]] << " "
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<< points[f[1]] << " " << points[f[2]] << endl
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<< endl;
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Info << "End\n" << endl;
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return 0;
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}
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// ************************************************************************* //
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