Migration from SVN

moeo/src/scalarStuffs/weighting/moeoFixedTimeBothDirectionWeightStrategy.h

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+/*
+* <moeoFixedTimeBothDirectionWeightStrategy>
+* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
+* (C) OPAC Team, LIFL, 2002-2007
+*
+* 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 MOEOFTBDWSWEIGHTSTRAT_H_
+#define MOEOFTBDWSWEIGHTSTRAT_H_
+#include <scalarStuffs/weighting/moeoVariableWeightStrategy.h>
+#include <algorithm>
+#include <utility>
+#include <utils/rnd_generators.h>
+
+/**
+ * Change all weights according to a "double strategy" pattern 2 to 1 then 1 to 2.
+ */
+template <class MOEOT>
+class moeoFixedTimeBothDirectionWeightStrategy: public moeoVariableWeightStrategy<MOEOT>
+{
+	public:
+		/**
+		 * default constructor 
+		 * @param _step how much we want the weight to change every iteration
+		 */
+		moeoFixedTimeBothDirectionWeightStrategy(double _step):step(_step),current(0),direction(false){}
+		/**
+		 * 
+		 * @param _weights the weights to change
+		 * @param moeot a moeot, not used
+		 */
+		void operator()(std::vector<double> &_weights,const MOEOT &moeot){
+			double res;
+			if (current==1){
+				res=1;
+				current=0;
+				direction=!direction;
+			}else res=current;
+			if (current+step>1){
+				current=1;
+			}else current+=step;
+			if (direction){
+			_weights[0]=res;
+			_weights[1]=1-res;
+			}else{
+			_weights[0]=1-res;
+			_weights[1]=res;
+			}
+		}
+
+	private:
+		double step;
+		double current;
+		bool direction;
+};
+
+#endif