patchIntersection: Added test application

applications/test/patchIntersection/Make/files

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

applications/test/patchIntersection/Make/options

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+EXE_INC = \
+    -I$(LIB_SRC)/fileFormats/lnInclude \
+    -I$(LIB_SRC)/meshTools/lnInclude
+
+EXE_LIBS = \
+    -lfileFormats \
+    -lmeshTools

applications/test/patchIntersection/Test-patchIntersection.C

@@ -0,0 +1,114 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     | Website:  https://openfoam.org
+    \\  /    A nd           | Copyright (C) 2024 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 "labelVector.H"
+#include "ListOps.H"
+#include "polyMesh.H"
+#include "primitivePatchIntersection.H"
+#include "Time.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+using namespace Foam;
+
+int main(int argc, char *argv[])
+{
+    static const scalar defaultSnapTol = Foam::sqrt(rootSmall);
+
+    argList::validArgs.append("source");
+    argList::validArgs.append("target");
+    argList::addOption
+    (
+        "snapTol",
+        "snapTol",
+        "snapping tolerance - default is " + name(defaultSnapTol)
+    );
+
+    #include "setRootCase.H"
+    #include "createTime.H"
+    #include "createPolyMesh.H"
+
+    const polyPatch& srcPatch = mesh.boundaryMesh()[args[1]];
+    const polyPatch& tgtPatch = mesh.boundaryMesh()[args[2]];
+    const scalar snapTol =
+        args.optionLookupOrDefault<scalar>("snapTol", defaultSnapTol);
+
+    if (mesh.nGeometricD() != 2 && mesh.nGeometricD() != 3)
+    {
+        FatalErrorInFunction
+            << "Primitive patch intersection can only be done on 2 or "
+            << "3-dimensional meshes" << exit(FatalError);
+    }
+
+    primitivePatchIntersection intersection(srcPatch, tgtPatch, snapTol);
+
+    // Check the patch-edge-points start and end in the right places
+    auto check = [&](const bool isSrc)
+    {
+        const primitivePatch& patch = isSrc ? srcPatch : tgtPatch;
+
+        const labelList& patchPointPoints =
+            isSrc
+          ? intersection.srcPointPoints()
+          : intersection.tgtPointPoints();
+
+        const List<DynamicList<label>>& patchEdgePoints =
+            isSrc
+          ? intersection.srcEdgePoints()
+          : intersection.tgtEdgePoints();
+
+        forAll(patch.edges(), edgei)
+        {
+            const edge& patchE = patch.edges()[edgei];
+
+            const edge ictE
+            (
+                patchPointPoints[patchE.start()],
+                patchPointPoints[patchE.end()]
+            );
+
+            const labelList& ictEPs = patchEdgePoints[edgei];
+
+            if (ictE != edge(ictEPs.first(), ictEPs.last()))
+            {
+                FatalErrorInFunction
+                    << "Patch-edge " << patchE << " has intersection end "
+                    << "points " << ictE << ", but these do not match the "
+                    << "first and last of all the intersection points "
+                    << ictEPs << exit(FatalError);
+            }
+        }
+    };
+    check(true);
+    check(false);
+
+    Info<< nl << "End" << nl << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //