Merge branch 'master' of github.com-OpenFOAM:OpenFOAM/OpenFOAM-dev

applications/test/polygonTriangulate/Make/files

@@ -0,0 +1,3 @@
+Test-polygonTriangulate.C
+
+EXE = $(FOAM_USER_APPBIN)/Test-polygonTriangulate

applications/test/polygonTriangulate/Make/options

@@ -0,0 +1,5 @@
+EXE_INC = \
+    -I$(LIB_SRC)/fileFormats/lnInclude
+
+EXE_LIBS = \
+    -lfileFormats

applications/test/polygonTriangulate/Test-polygonTriangulate.C

@@ -0,0 +1,121 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     | Website:  https://openfoam.org
+    \\  /    A nd           | Copyright (C) 2021 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 "argList.H"
+#include "clock.H"
+#include "OBJstream.H"
+#include "polygonTriangulate.H"
+
+using namespace Foam;
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+int main(int argc, char *argv[])
+{
+    argList::validArgs.append("number of edges");
+    argList::addOption
+    (
+        "error",
+        "value",
+        "polygon error - default is 0"
+    );
+    argList::addOption
+    (
+        "seed",
+        "value",
+        "random number generator seed - default is clock time"
+    );
+    argList::addBoolOption
+    (
+        "simple",
+        "assume polygon as no self intersections"
+    );
+    argList::addBoolOption
+    (
+        "nonOptimal",
+        "do not optimise the triangulation quality"
+    );
+
+    Foam::argList args(argc, argv);
+    Info<< nl;
+
+    // Get the size of the polygon
+    const label n = args.argRead<label>(1);
+
+    // Initialise the random number generator
+    label seed;
+    if (args.optionFound("seed"))
+    {
+        seed = args.optionRead<label>("seed");
+    }
+    else
+    {
+        seed = clock::getTime();
+        Info<< "Seeding random number generator with value " << seed
+            << nl << endl;
+    }
+    Random rndGen(seed);
+
+    // Get controls
+    const bool simple = args.optionFound("simple");
+    const bool nonOptimal = args.optionFound("nonOptimal");
+
+    // Generate a random polygon
+    const List<point> polygon =
+        polygonTriangulate::randomPolygon
+        (
+            rndGen,
+            n,
+            args.optionLookupOrDefault<scalar>("error", 0)
+        );
+
+    // Write the polygon
+    {
+        OBJstream os(args[0] + "_polygon.obj");
+        os.write(face(identity(polygon.size())), polygon, false);
+    }
+
+    // Triangulate the polygon
+    const List<triFace> triPoints =
+        polygonTriangulate().triangulate(polygon, simple, !nonOptimal);
+
+    // Write the triangulation
+    faceList triFacePoints(triPoints.size());
+    forAll(triPoints, trii)
+    {
+        triFacePoints[trii] = triPoints[trii];
+    }
+    {
+        OBJstream os(args[0] + "_triangulation.obj");
+        os.write(triFacePoints, pointField(polygon), false);
+    }
+
+    Info<< "End" << nl << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //