98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
/*
|
|
* <moeoEuclideanDistance.h>
|
|
* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
|
|
* (C) OPAC Team, LIFL, 2002-2007
|
|
*
|
|
* Arnaud Liefooghe
|
|
* François Legillon
|
|
*
|
|
* This software is governed by the CeCILL license under French law and
|
|
* abiding by the rules of distribution of free software. You can use,
|
|
* modify and/ or redistribute the software under the terms of the CeCILL
|
|
* license as circulated by CEA, CNRS and INRIA at the following URL
|
|
* "http://www.cecill.info".
|
|
*
|
|
* As a counterpart to the access to the source code and rights to copy,
|
|
* modify and redistribute granted by the license, users are provided only
|
|
* with a limited warranty and the software's author, the holder of the
|
|
* economic rights, and the successive licensors have only limited liability.
|
|
*
|
|
* In this respect, the user's attention is drawn to the risks associated
|
|
* with loading, using, modifying and/or developing or reproducing the
|
|
* software by the user in light of its specific status of free software,
|
|
* that may mean that it is complicated to manipulate, and that also
|
|
* therefore means that it is reserved for developers and experienced
|
|
* professionals having in-depth computer knowledge. Users are therefore
|
|
* encouraged to load and test the software's suitability as regards their
|
|
* requirements in conditions enabling the security of their systems and/or
|
|
* data to be ensured and, more generally, to use and operate it in the
|
|
* same conditions as regards security.
|
|
* The fact that you are presently reading this means that you have had
|
|
* knowledge of the CeCILL license and that you accept its terms.
|
|
*
|
|
* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
|
|
* Contact: paradiseo-help@lists.gforge.inria.fr
|
|
*
|
|
*/
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#ifndef MOEOEUCLIDEANDISTANCE_H_
|
|
#define MOEOEUCLIDEANDISTANCE_H_
|
|
|
|
#include <math.h>
|
|
#include <distance/moeoObjSpaceDistance.h>
|
|
#include <utils/moeoObjectiveVectorNormalizer.h>
|
|
|
|
/**
|
|
* A class allowing to compute an euclidian distance between two solutions in the objective space with normalized objective values (i.e. between 0 and 1).
|
|
* A distance value then lies between 0 and sqrt(nObjectives).
|
|
*/
|
|
template < class MOEOT >
|
|
class moeoEuclideanDistance : public moeoObjSpaceDistance < MOEOT >
|
|
{
|
|
public:
|
|
|
|
/** the objective vector type of the solutions */
|
|
typedef typename MOEOT::ObjectiveVector ObjectiveVector;
|
|
/** the fitness type of the solutions */
|
|
typedef typename MOEOT::Fitness Fitness;
|
|
|
|
/**
|
|
ctr with a normalizer
|
|
@param _normalizer the normalizer used for every ObjectiveVector
|
|
*/
|
|
moeoEuclideanDistance (moeoObjectiveVectorNormalizer<MOEOT> _normalizer):normalizer(_normalizer)
|
|
{}
|
|
/**
|
|
default ctr
|
|
*/
|
|
moeoEuclideanDistance ():normalizer(defaultNormalizer)
|
|
{}
|
|
|
|
/**
|
|
* Returns the euclidian distance between _obj1 and _obj2 in the objective space
|
|
* @param _obj1 the first objective vector
|
|
* @param _obj2 the second objective vector
|
|
*/
|
|
const Fitness operator()(const ObjectiveVector & _obj1, const ObjectiveVector & _obj2)
|
|
{
|
|
Fitness result = 0.0;
|
|
Fitness tmp1, tmp2;
|
|
for (unsigned int i=0; i<ObjectiveVector::nObjectives(); i++)
|
|
{
|
|
tmp1 = normalizer(_obj1)[i];
|
|
tmp2 = normalizer(_obj2)[i];
|
|
result += (tmp1-tmp2) * (tmp1-tmp2);
|
|
}
|
|
return sqrt(result);
|
|
}
|
|
|
|
|
|
private:
|
|
|
|
moeoObjectiveVectorNormalizer<MOEOT> defaultNormalizer;
|
|
moeoObjectiveVectorNormalizer<MOEOT> &normalizer;
|
|
|
|
};
|
|
|
|
#endif /*MOEOEUCLIDEANDISTANCE_H_*/
|