polyMeshGenModifierRemoveUnusedVertices.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 "polyMeshGenModifier.H"
#include "demandDrivenData.H"
#include "labelList.H"
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
void polyMeshGenModifier::removeUnusedVertices()
{
    faceListPMG& faces = mesh_.faces_;
    pointFieldPMG& points = mesh_.points_;
 
    boolList usePoint(points.size(), false);
    forAll(faces, faceI)
    {
        const face& f = faces[faceI];
 
        forAll(f, pI)
            usePoint[f[pI]] = true;
    }
 
    labelLongList newLabel(points.size(), -1);
    label nPoints(0);
    forAll(points, pI)
        if( usePoint[pI] )
            newLabel[pI] = nPoints++;
 
    //- remove unused points from the list
    forAll(newLabel, pI)
        if( (newLabel[pI] != -1) && (newLabel[pI] < pI) )
        {
            points[newLabel[pI]] = points[pI];
        }
 
    points.setSize(nPoints);
 
    forAll(faces, faceI)
    {
        face& f = faces[faceI];
 
        forAll(f, pI)
            f[pI] = newLabel[f[pI]];
    }
 
    mesh_.updatePointSubsets(newLabel);
 
    mesh_.clearOut();
    this->clearOut();
}
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //