triSurfaceCleanupDuplicateTrianglesFunctions.C

Go to the documentation of this file.

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  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 "triSurfaceCleanupDuplicateTriangles.H"
#include "triSurfModifier.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
void triSurfaceCleanupDuplicateTriangles::checkDuplicateTriangles()
{
    labelLongList newTriangleLabel(surf_.size(), -1);
 
    const VRWGraph& pointTriangles = surf_.pointFacets();
 
    //- check if there exist duplicate triangles
    label counter(0);
 
    forAll(surf_, triI)
    {
        if( newTriangleLabel[triI] != -1 )
            continue;
 
        newTriangleLabel[triI] = counter;
        ++counter;
 
        const labelledTri& tri = surf_[triI];
 
        forAll(pointTriangles[tri[0]], ptI)
        {
            const label triJ = pointTriangles(tri[0], ptI);
 
            if( triJ <= triI )
                continue;
 
            const labelledTri& otherTri = surf_[triJ];
 
            if( tri == otherTri )
                newTriangleLabel[triJ] = newTriangleLabel[triI];
        }
    }
 
    Info << "Found " << (newTriangleLabel.size()-counter)
        << " duplicate triangles" << endl;
 
    //- return if there exist no duplicate triangles
    if( counter == newTriangleLabel.size() )
        return;
 
    Info << "Current number of triangles" << surf_.size() << endl;
    Info << "New number of triangles " << counter << endl;
 
    //- create new list of triangles and store it in the surface mesh
    LongList<labelledTri> newTriangles(counter);
 
    forAll(newTriangleLabel, triI)
    {
        newTriangles[newTriangleLabel[triI]] = surf_[triI];
    }
 
    triSurfModifier(surf_).facetsAccess().transfer(newTriangles);
    surf_.updateFacetsSubsets(newTriangleLabel);
 
    surf_.clearAddressing();
    surf_.clearGeometry();
}
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// ************************************************************************* //