cd4c12e735
git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@297 331e1502-861f-0410-8da2-ba01fb791d7f
103 lines
2.6 KiB
C++
103 lines
2.6 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// eoStarTopology.h
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// (c) OPAC 2007
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/*
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This library...
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Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
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*/
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//-----------------------------------------------------------------------------
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#ifndef EOSTARTOPOLOGY_H_
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#define EOSTARTOPOLOGY_H_
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//-----------------------------------------------------------------------------
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#include <eoTopology.h>
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#include <eoNeighborhood.h>
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//-----------------------------------------------------------------------------
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/**
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* Topology dedicated to "globest best" strategy.
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* All the particles of the swarm belong to the same and only one neighborhood.
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* The global best is stored as a protected member and updated by using the "update" method.
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*/
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template < class POT > class eoStarTopology:public eoTopology <POT>
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{
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public:
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/**
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* The only Ctor. No parameter required.
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*/
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eoStarTopology (){}
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/**
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* Builds the only neighborhood that contains all the particles of the given population.
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* Also initializes the global best particle with the best particle of the given population.
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* @param _pop - The population used to build the only neighborhood.
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*/
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void setup(const eoPop<POT> & _pop)
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{
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// put all the particles in the only neighborhood
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for(unsigned i=0;i < _pop.size();i++)
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neighborhood.put(i);
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// set the initial global best as the best initial particle
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neighborhood.best(_pop.best_element());
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}
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/*
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* Update the best fitness of the given particle if it's better.
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* Also replace the global best by the given particle if it's better.
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*/
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void update(POT & _po,unsigned _indice)
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{
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// update the best fitness of the particle
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if(_po.fitness() > _po.best())
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{
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_po.best(_po.fitness());
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}
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// update the global best if the given particle is "better"
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if(_po.fitness() > neighborhood.best().fitness())
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{
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neighborhood.best(_po);
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}
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}
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/**
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* Return the global best particle.
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*/
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POT & best (unsigned _indice) {return (neighborhood.best());}
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/**
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* Print the structure of the topology on the standard output.
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*/
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void printOn()
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{
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std::cout << "{" ;
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for(unsigned i=0;i< neighborhood.size();i++)
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std::cout << neighborhood.get(i) << " ";
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std::cout << "}" << std::endl;
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}
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protected:
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eoNeighborhood<POT> neighborhood; // the only neighborhood
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};
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#endif /*EOSTARTOPOLOGY_H_ */
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