PatchToolsEdgeOwner.C

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    Copyright (C) 2011-2015 OpenFOAM Foundation
    Copyright (C) 2020 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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#include "PatchTools.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
template<class FaceList, class PointField>
Foam::labelList
Foam::PatchTools::edgeOwner
(
    const PrimitivePatch<FaceList, PointField>& p
)
{
    typedef typename PrimitivePatch<FaceList, PointField>::face_type FaceType;
 
    const edgeList& edges = p.edges();
    const labelListList& edgeFaces = p.edgeFaces();
    const List<FaceType>& localFaces = p.localFaces();
 
    // create the owner list
    labelList edgeOwner(edges.size(), -1);
 
    forAll(edges, edgeI)
    {
        const labelList& nbrFaces = edgeFaces[edgeI];
 
        if (nbrFaces.size() == 1)
        {
            edgeOwner[edgeI] = nbrFaces[0];
        }
        else
        {
            // Find the first face whose vertices are aligned with the edge.
            // with multiply connected edges, this is the best we can do
            for (const label nbrFacei : nbrFaces)
            {
                const FaceType& f = localFaces[nbrFacei];
 
                if (f.edgeDirection(edges[edgeI]) > 0)
                {
                    edgeOwner[edgeI] = nbrFacei;
                    break;
                }
            }
 
            if (edgeOwner[edgeI] == -1)
            {
                FatalErrorInFunction
                    << "Edge " << edgeI << " vertices:" << edges[edgeI]
                    << " is used by faces " << nbrFaces
                    << " vertices:"
                    << UIndirectList<FaceType>(localFaces, nbrFaces)
                    << " none of which use the edge vertices in the same order"
                    << nl << "I give up" << abort(FatalError);
            }
        }
    }
 
    return edgeOwner;
}
 
 
// ************************************************************************* //