triSurfacePatchManipulatorFunctions.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | cfMesh: A library for mesh generation
   \\    /   O peration     |
    \\  /    A nd           | Author: Franjo Juretic (franjo.juretic@c-fields.com)
     \\/     M anipulation  | Copyright (C) Creative Fields, Ltd.
-------------------------------------------------------------------------------
License
    This file is part of cfMesh.
 
    cfMesh 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.
 
    cfMesh 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 cfMesh.  If not, see <http://www.gnu.org/licenses/>.
 
Description
 
\*---------------------------------------------------------------------------*/
 
#include "triSurfacePatchManipulator.H"
#include "helperFunctions.H"
#include "demandDrivenData.H"
 
# ifdef USE_OMP
#include <omp.h>
# endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
void triSurfacePatchManipulator::allocateFeatureEdges()
{
    const edgeLongList& edges = surf_.edges();
    const VRWGraph& pEdges = surf_.pointEdges();
 
    //- allocate featureEdges list
    featureEdges_.setSize(edges.size());
    featureEdges_ = direction(0);
 
    const edgeLongList& featureEdges = surf_.featureEdges();
 
    forAll(featureEdges, feI)
    {
        const edge& e = featureEdges[feI];
 
        forAllRow(pEdges, e.start(), peI)
        {
            const label eI = pEdges(e.start(), peI);
 
            if( edges[eI] == e )
                featureEdges_[eI] |= 1;
        }
    }
}
 
void triSurfacePatchManipulator::createPatches()
{
    nPatches_ = 0;
    facetInPatch_.setSize(surf_.size());
    facetInPatch_ = -1;
 
    const VRWGraph& faceEdges = surf_.facetEdges();
    const VRWGraph& edgeFaces = surf_.edgeFacets();
 
    forAll(facetInPatch_, triI)
    {
        if( facetInPatch_[triI] != -1 )
            continue;
 
        labelLongList front;
        front.append(triI);
        facetInPatch_[triI] = nPatches_;
 
        while( front.size() )
        {
            const label fLabel = front.removeLastElement();
 
            const constRow fEdges = faceEdges[fLabel];
 
            forAll(fEdges, feI)
            {
                const label edgeI = fEdges[feI];
 
                //- check if th edges is marked as a feature edge
                if( featureEdges_[edgeI] )
                    continue;
 
                const constRow eFaces = edgeFaces[edgeI];
 
                //- stop at non-manifold edges
                if( eFaces.size() != 2 )
                    continue;
 
                label neiTri = eFaces[0];
                if( neiTri == fLabel )
                    neiTri = eFaces[1];
 
                //- do not overwrite existing patch information
                if( surf_[fLabel].region() != surf_[neiTri].region() )
                    continue;
                if( facetInPatch_[neiTri] != -1 )
                    continue;
 
                facetInPatch_[neiTri] = nPatches_;
                front.append(neiTri);
            }
        }
 
        ++nPatches_;
    }
 
    Info << "Created " << nPatches_ << " surface patches" << endl;
}
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// ************************************************************************* //