volumeOptimizer.H

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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/>.
 
Class
    volumeOptimizer
 
Description
    Mesh smoothing without any topological changes. The vertex is put into
    location which minimises the objective function.
 
SourceFiles
    volumeOptimizer.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef volumeOptimizer_H
#define volumeOptimizer_H
 
#include "simplexSmoother.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declarations
class partTetMeshSimplex;
 
/*---------------------------------------------------------------------------*\
                    Class volumeOptimizer Declaration
\*---------------------------------------------------------------------------*/
 
//- class for volume optimizer
class volumeOptimizer
:
    public simplexSmoother
{
    // Private static data
        //- direction vectors for divide and conquer algorithm
        static const vector dirVecs[8];
 
    // Private member functions
        //- evaluate functional
        scalar evaluateFunc() const;
 
        //- find appropriate value of K
        scalar evaluateStabilisationFactor() const;
 
        //- evaluate gradients of the functional
        void evaluateGradientsExact(vector&, tensor&) const;
 
        //- optimize position using a divide and conquer algorithm
        scalar optimiseDivideAndConquer(const scalar tol);
 
        //- optimise using the steepest descent
        scalar optimiseSteepestDescent(const scalar tol);
 
    public:
 
    // Constructor
        //- construct from partTetMeshSimplex
        volumeOptimizer(partTetMeshSimplex& simplex);
 
    // Destructor
        ~volumeOptimizer();
 
    // Member functions
        //- find the best position for the node
        void optimizeNodePosition(const scalar tol = 0.001);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //