87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
/*
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* <moeoFixedTimeBothDirectionWeightStrategy>
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* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
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* (C) OPAC Team, LIFL, 2002-2007
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*
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* François Legillon
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*
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* This software is governed by the CeCILL license under French law and
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* abiding by the rules of distribution of free software. You can use,
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* modify and/ or redistribute the software under the terms of the CeCILL
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* license as circulated by CEA, CNRS and INRIA at the following URL
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* "http://www.cecill.info".
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*
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* As a counterpart to the access to the source code and rights to copy,
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* modify and redistribute granted by the license, users are provided only
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* with a limited warranty and the software's author, the holder of the
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* economic rights, and the successive licensors have only limited liability.
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*
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* In this respect, the user's attention is drawn to the risks associated
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* with loading, using, modifying and/or developing or reproducing the
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* software by the user in light of its specific status of free software,
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* that may mean that it is complicated to manipulate, and that also
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* therefore means that it is reserved for developers and experienced
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* professionals having in-depth computer knowledge. Users are therefore
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* encouraged to load and test the software's suitability as regards their
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* requirements in conditions enabling the security of their systems and/or
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* data to be ensured and, more generally, to use and operate it in the
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* same conditions as regards security.
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* The fact that you are presently reading this means that you have had
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* knowledge of the CeCILL license and that you accept its terms.
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*
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* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
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* Contact: paradiseo-help@lists.gforge.inria.fr
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*
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*/
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//-----------------------------------------------------------------------------
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#ifndef MOEOFTBDWSWEIGHTSTRAT_H_
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#define MOEOFTBDWSWEIGHTSTRAT_H_
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#include <scalarStuffs/weighting/moeoVariableWeightStrategy.h>
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#include <algorithm>
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#include <utility>
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#include <utils/rnd_generators.h>
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/**
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* Change all weights according to a "double strategy" pattern 2 to 1 then 1 to 2.
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*/
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template <class MOEOT>
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class moeoFixedTimeBothDirectionWeightStrategy: public moeoVariableWeightStrategy<MOEOT>
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{
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public:
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/**
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* default constructor
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* @param _step how much we want the weight to change every iteration
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*/
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moeoFixedTimeBothDirectionWeightStrategy(double _step):step(_step),current(0),direction(false){}
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/**
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*
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* @param _weights the weights to change
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* @param moeot a moeot, not used
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*/
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void operator()(std::vector<double> &_weights,const MOEOT &moeot){
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double res;
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if (current==1){
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res=1;
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current=0;
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direction=!direction;
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}else res=current;
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if (current+step>1){
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current=1;
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}else current+=step;
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if (direction){
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_weights[0]=res;
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_weights[1]=1-res;
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}else{
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_weights[0]=1-res;
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_weights[1]=res;
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}
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}
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private:
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double step;
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double current;
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bool direction;
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};
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#endif
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