Add the OpenFOAM source tree

applications/utilities/mesh/manipulation/autoPatch/Make/files

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+autoPatch.C
+
+EXE = $(FOAM_APPBIN)/autoPatch

applications/utilities/mesh/manipulation/autoPatch/Make/options

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+EXE_INC = \
+    -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/dynamicMesh/lnInclude
+
+EXE_LIBS = \
+    -ldynamicMesh \
+    -lmeshTools

applications/utilities/mesh/manipulation/autoPatch/autoPatch.C

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+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2011-2013 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/>.
+
+Application
+    autoPatch
+
+Description
+    Divides external faces into patches based on (user supplied) feature
+    angle.
+
+\*---------------------------------------------------------------------------*/
+
+#include "argList.H"
+#include "polyMesh.H"
+#include "Time.H"
+#include "boundaryMesh.H"
+#include "repatchPolyTopoChanger.H"
+#include "unitConversion.H"
+#include "OFstream.H"
+#include "ListOps.H"
+
+using namespace Foam;
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// Get all feature edges.
+void collectFeatureEdges(const boundaryMesh& bMesh, labelList& markedEdges)
+{
+    markedEdges.setSize(bMesh.mesh().nEdges());
+
+    label markedI = 0;
+
+    forAll(bMesh.featureSegments(), i)
+    {
+        const labelList& segment = bMesh.featureSegments()[i];
+
+        forAll(segment, j)
+        {
+            label featEdgeI = segment[j];
+
+            label meshEdgeI = bMesh.featureToEdge()[featEdgeI];
+
+            markedEdges[markedI++] = meshEdgeI;
+        }
+    }
+    markedEdges.setSize(markedI);
+}
+
+
+
+int main(int argc, char *argv[])
+{
+#   include "addOverwriteOption.H"
+    argList::noParallel();
+    argList::validArgs.append("feature angle[0-180]");
+
+#   include "setRootCase.H"
+#   include "createTime.H"
+    runTime.functionObjects().off();
+#   include "createPolyMesh.H"
+    const word oldInstance = mesh.pointsInstance();
+
+    Info<< "Mesh read in = "
+        << runTime.cpuTimeIncrement()
+        << " s\n" << endl << endl;
+
+
+    const scalar featureAngle = args.argRead<scalar>(1);
+    const bool overwrite      = args.optionFound("overwrite");
+
+    const scalar minCos = Foam::cos(degToRad(featureAngle));
+
+    Info<< "Feature:" << featureAngle << endl
+        << "minCos :" << minCos << endl
+        << endl;
+
+    //
+    // Use boundaryMesh to reuse all the featureEdge stuff in there.
+    //
+
+    boundaryMesh bMesh;
+    bMesh.read(mesh);
+
+    // Set feature angle (calculate feature edges)
+    bMesh.setFeatureEdges(minCos);
+
+    // Collect all feature edges as edge labels
+    labelList markedEdges;
+
+    collectFeatureEdges(bMesh, markedEdges);
+
+
+
+    // (new) patch ID for every face in mesh.
+    labelList patchIDs(bMesh.mesh().size(), -1);
+
+    //
+    // Fill patchIDs with values for every face by floodfilling without
+    // crossing feature edge.
+    //
+
+    // Current patch number.
+    label newPatchI = bMesh.patches().size();
+
+    label suffix = 0;
+
+    while (true)
+    {
+        // Find first unset face.
+        label unsetFaceI = findIndex(patchIDs, -1);
+
+        if (unsetFaceI == -1)
+        {
+            // All faces have patchID set. Exit.
+            break;
+        }
+
+        // Found unset face. Create patch for it.
+        word patchName;
+        do
+        {
+            patchName = "auto" + name(suffix++);
+        }
+        while (bMesh.findPatchID(patchName) != -1);
+
+        bMesh.addPatch(patchName);
+
+        bMesh.changePatchType(patchName, "patch");
+
+
+        // Fill visited with all faces reachable from unsetFaceI.
+        boolList visited(bMesh.mesh().size());
+
+        bMesh.markFaces(markedEdges, unsetFaceI, visited);
+
+
+        // Assign all visited faces to current patch
+        label nVisited = 0;
+
+        forAll(visited, faceI)
+        {
+            if (visited[faceI])
+            {
+                nVisited++;
+
+                patchIDs[faceI] = newPatchI;
+            }
+        }
+
+        Info<< "Assigned " << nVisited << " faces to patch " << patchName
+            << endl << endl;
+
+        newPatchI++;
+    }
+
+
+
+    const PtrList<boundaryPatch>& patches = bMesh.patches();
+
+    // Create new list of patches with old ones first
+    List<polyPatch*> newPatchPtrList(patches.size());
+
+    newPatchI = 0;
+
+    // Copy old patches
+    forAll(mesh.boundaryMesh(), patchI)
+    {
+        const polyPatch& patch = mesh.boundaryMesh()[patchI];
+
+        newPatchPtrList[newPatchI] =
+            patch.clone
+            (
+                mesh.boundaryMesh(),
+                newPatchI,
+                patch.size(),
+                patch.start()
+            ).ptr();
+
+        newPatchI++;
+    }
+
+    // Add new ones with empty size.
+    for (label patchI = newPatchI; patchI < patches.size(); patchI++)
+    {
+        const boundaryPatch& bp = patches[patchI];
+
+        newPatchPtrList[newPatchI] = polyPatch::New
+        (
+            polyPatch::typeName,
+            bp.name(),
+            0,
+            mesh.nFaces(),
+            newPatchI,
+            mesh.boundaryMesh()
+        ).ptr();
+
+        newPatchI++;
+    }
+
+    if (!overwrite)
+    {
+        runTime++;
+    }
+
+
+    // Change patches
+    repatchPolyTopoChanger polyMeshRepatcher(mesh);
+    polyMeshRepatcher.changePatches(newPatchPtrList);
+
+
+    // Change face ordering
+
+    // Since bMesh read from mesh there is one to one mapping so we don't
+    // have to do the geometric stuff.
+    const labelList& meshFace = bMesh.meshFace();
+
+    forAll(patchIDs, faceI)
+    {
+        label meshFaceI = meshFace[faceI];
+
+        polyMeshRepatcher.changePatchID(meshFaceI, patchIDs[faceI]);
+    }
+
+    polyMeshRepatcher.repatch();
+
+    // Write resulting mesh
+    if (overwrite)
+    {
+        mesh.setInstance(oldInstance);
+    }
+
+    // Set the precision of the points data to 10
+    IOstream::defaultPrecision(max(10u, IOstream::defaultPrecision()));
+
+    mesh.write();
+
+    Info<< "End\n" << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //