122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration | Website: https://openfoam.org
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\\ / A nd | Copyright (C) 2021-2023 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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\*---------------------------------------------------------------------------*/
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#include "argList.H"
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#include "clock.H"
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#include "OBJstream.H"
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#include "polygonTriangulate.H"
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using namespace Foam;
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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argList::validArgs.append("number of edges");
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argList::addOption
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(
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"error",
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"value",
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"polygon error - default is 0"
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);
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argList::addOption
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(
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"seed",
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"value",
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"random number generator seed - default is clock time"
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);
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argList::addBoolOption
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(
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"simple",
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"assume polygon as no self intersections"
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);
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argList::addBoolOption
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(
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"nonOptimal",
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"do not optimise the triangulation quality"
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);
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Foam::argList args(argc, argv);
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Info<< nl;
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// Get the size of the polygon
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const label n = args.argRead<label>(1);
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// Initialise the random number generator
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label seed;
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if (args.optionFound("seed"))
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{
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seed = args.optionRead<label>("seed");
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}
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else
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{
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seed = clock::getTime();
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Info<< "Seeding random number generator with value " << seed
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<< nl << endl;
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}
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Random rndGen(seed);
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// Get controls
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const bool simple = args.optionFound("simple");
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const bool nonOptimal = args.optionFound("nonOptimal");
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// Generate a random polygon
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const List<point> polygon =
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polygonTriangulate::randomPolygon
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(
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rndGen,
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n,
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args.optionLookupOrDefault<scalar>("error", 0)
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);
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// Write the polygon
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{
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OBJstream os(args[0] + "_polygon.obj");
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os.write(face(identityMap(polygon.size())), polygon, false);
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}
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// Triangulate the polygon
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const List<triFace> triPoints =
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polygonTriangulate().triangulate(polygon, simple, !nonOptimal);
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// Write the triangulation
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faceList triFacePoints(triPoints.size());
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forAll(triPoints, trii)
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{
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triFacePoints[trii] = triPoints[trii];
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}
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{
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OBJstream os(args[0] + "_triangulation.obj");
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os.write(triFacePoints, pointField(polygon), false);
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}
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Info<< "End" << nl << endl;
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return 0;
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}
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// ************************************************************************* //
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