PrimitivePatchBdryPoints.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
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    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2020-2021 OpenCFD Ltd.
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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
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#include "PrimitivePatch.H"
#include "HashSet.H"
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
template<class FaceList, class PointField>
void
Foam::PrimitivePatch<FaceList, PointField>::calcBdryPoints() const
{
    if (boundaryPointsPtr_)
    {
        // Error to recalculate if already allocated
        FatalErrorInFunction
            << "boundaryPoints already calculated"
            << abort(FatalError);
    }
 
    labelHashSet bp(0);
 
    if (hasEdges())
    {
        DebugInFunction
            << "Calculating boundary points from existing addressing"
            << nl;
 
        bp.resize(4*nBoundaryEdges());
 
        for (const edge& e : boundaryEdges())
        {
            bp.insert(e.first());
            bp.insert(e.second());
        }
    }
    else
    {
        DebugInFunction
            << "Calculating boundary points with manual edge addressing"
            << nl;
 
 
        // Calculate manually.
        // Needs localFaces, but uses local hashes of the edges here
        // instead of forcing a full faceFaces/edgeFaces/faceEdges calculation
 
        // Get reference to localFaces
        const List<face_type>& locFcs = localFaces();
 
        // Guess the max number of edges/neighbours for a face
        label edgeCount = 0;
        for (const auto& f : locFcs)
        {
            edgeCount += f.nEdges();
        }
 
        // ie, EdgeMap<label> to keep counts
        HashTable<label, edge, Hash<edge>> knownEdges(2*edgeCount);
 
        for (const auto& f : locFcs)
        {
            const label numEdges = f.nEdges();
 
            for (label edgei = 0; edgei < numEdges; ++edgei)
            {
                ++ knownEdges(f.edge(edgei));
            }
        }
 
        edgeCount = 0;
 
        forAllConstIters(knownEdges, iter)
        {
            if (1 == iter.val())  // Singly connected edge
            {
                ++edgeCount;
            }
        }
 
        bp.resize(4*edgeCount);
 
        forAllConstIters(knownEdges, iter)
        {
            const edge& e = iter.key();
 
            if (1 == iter.val())  // Singly connected edge
            {
                bp.insert(e.first());
                bp.insert(e.second());
            }
        }
    }
 
    boundaryPointsPtr_.reset(new labelList(bp.sortedToc()));
    DebugInfo << "    Finished." << nl;
}
 
 
// ************************************************************************* //