ENH: patchDist: helper class to determine distance on patch to neighbouring patches

src/meshTools/algorithms/PatchEdgeFaceWave/patchDist.C

@@ -0,0 +1,173 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2011 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 "patchDist.H"
+#include "PatchEdgeFaceWave.H"
+#include "syncTools.H"
+#include "polyMesh.H"
+#include "patchEdgeFaceInfo.H"
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::patchDist::patchDist
+(
+    const polyPatch& patch,
+    const labelHashSet& nbrPatchIDs
+)
+:
+    patch_(patch),
+    nbrPatchIDs_(nbrPatchIDs),
+    nUnset_(0)
+{
+    patchDist::correct();
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::patchDist::~patchDist()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::patchDist::correct()
+{
+    // Mark all edge connected to a nbrPatch.
+    label nBnd = 0;
+    forAllConstIter(labelHashSet, nbrPatchIDs_, iter)
+    {
+        label nbrPatchI = iter.key();
+        const polyPatch& nbrPatch = patch_.boundaryMesh()[nbrPatchI];
+        nBnd += nbrPatch.nEdges()-nbrPatch.nInternalEdges();
+    }
+
+    // Mark all edges. Note: should use HashSet but have no syncTools
+    // functionality for these.
+    EdgeMap<label> nbrEdges(2*nBnd);
+
+    forAllConstIter(labelHashSet, nbrPatchIDs_, iter)
+    {
+        label nbrPatchI = iter.key();
+        const polyPatch& nbrPatch = patch_.boundaryMesh()[nbrPatchI];
+        const labelList& nbrMp = nbrPatch.meshPoints();
+
+        for
+        (
+            label edgeI = nbrPatch.nInternalEdges();
+            edgeI < nbrPatch.nEdges();
+            edgeI++
+        )
+        {
+            const edge& e = nbrPatch.edges()[edgeI];
+            const edge meshE = edge(nbrMp[e[0]], nbrMp[e[1]]);
+            nbrEdges.insert(meshE, nbrPatchI);
+        }
+    }
+
+
+    // Make sure these boundary edges are marked everywhere.
+    syncTools::syncEdgeMap
+    (
+        patch_.boundaryMesh().mesh(),
+        nbrEdges,
+        maxEqOp<label>()
+    );
+
+
+    // Data on all edges and faces
+    List<patchEdgeFaceInfo> allEdgeInfo(patch_.nEdges());
+    List<patchEdgeFaceInfo> allFaceInfo(patch_.size());
+
+    // Initial seed
+    label nBndEdges = patch_.nEdges() - patch_.nInternalEdges();
+    DynamicList<label> initialEdges(2*nBndEdges);
+    DynamicList<patchEdgeFaceInfo> initialEdgesInfo(2*nBndEdges);
+
+
+    // Seed all my edges that are also nbrEdges
+
+    const labelList& mp = patch_.meshPoints();
+
+    for
+    (
+        label edgeI = patch_.nInternalEdges();
+        edgeI < patch_.nEdges();
+        edgeI++
+    )
+    {
+        const edge& e = patch_.edges()[edgeI];
+        const edge meshE = edge(mp[e[0]], mp[e[1]]);
+        EdgeMap<label>::const_iterator edgeFnd = nbrEdges.find(meshE);
+        if (edgeFnd != nbrEdges.end())
+        {
+            initialEdges.append(edgeI);
+            initialEdgesInfo.append
+            (
+                patchEdgeFaceInfo
+                (
+                    e.centre(patch_.localPoints()),
+                    0.0
+                )
+            );
+        }
+    }
+
+
+    // Walk
+    PatchEdgeFaceWave
+    <
+        primitivePatch,
+        patchEdgeFaceInfo
+    > calc
+    (
+        patch_.boundaryMesh().mesh(),
+        patch_,
+        initialEdges,
+        initialEdgesInfo,
+        allEdgeInfo,
+        allFaceInfo,
+        returnReduce(patch_.nEdges(), sumOp<label>())
+    );
+
+
+    // Extract into *this
+    setSize(patch_.size());
+    nUnset_ = 0;
+    forAll(allFaceInfo, faceI)
+    {
+        if (allFaceInfo[faceI].valid(calc.data()))
+        {
+            operator[](faceI) =  Foam::sqrt(allFaceInfo[faceI].distSqr());
+        }
+        else
+        {
+            nUnset_++;
+        }
+    }
+}
+
+
+// ************************************************************************* //