particle-swarm-optimization main templates added
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tlegrand
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138
eo/src/eoSyncEasyPSO.h
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138
eo/src/eoSyncEasyPSO.h
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// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// eoSyncEasyPSO.h
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// (c) OPAC 2007
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/*
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Contact: thomas.legrand@lifl.fr
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*/
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//-----------------------------------------------------------------------------
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#ifndef _EOSYNCEASYPSO_H
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#define _EOSYNCEASYPSO_H
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//-----------------------------------------------------------------------------
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#include <eoContinue.h>
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#include <eoPopEvalFunc.h>
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#include <eoPSO.h>
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#include <eoVelocity.h>
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#include <eoFlight.h>
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#include <eoDummyFlight.h>
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//-----------------------------------------------------------------------------
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/** An easy-to-use synchronous particle swarm algorithm; you can use any particle,
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* any flight, any topology... The main steps are :
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* - perform a first evaluation of the population
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* - for each generation
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* - evaluate ALL the velocities
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* -- perform the fligth of ALL the particles
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* -- evaluate ALL the particles
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* -- update the neighborhoods
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*/
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template < class POT > class eoSyncEasyPSO:public eoPSO < POT >
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{
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public:
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/** Full constructor
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* @param _continuator - An eoContinue that manages the stopping criterion and the checkpointing system
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* @param _eval - An eoEvalFunc: the evaluation performer
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* @param _velocity - An eoVelocity that defines how to compute the velocities
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* @param _flight - An eoFlight that defines how to make the particle flying: that means how
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* to modify the positions according to the velocities
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*/
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eoSyncEasyPSO (
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eoContinue < POT > &_continuator,
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eoEvalFunc < POT > &_eval,
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eoVelocity < POT > &_velocity,
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eoFlight < POT > &_flight):
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continuator (_continuator),
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eval (_eval),
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loopEval(_eval),
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popEval(loopEval),
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velocity (_velocity),
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flight (_flight){}
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/** Constructor without eoFlight. For special cases when the flight is performed withing the velocity.
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* @param _continuator - An eoContinue that manages the stopping criterion and the checkpointing system
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* @param _eval - An eoEvalFunc: the evaluation performer
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* @param _velocity - An eoVelocity that defines how to compute the velocities
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*/
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eoSyncEasyPSO (
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eoContinue < POT > &_continuator,
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eoEvalFunc < POT > &_eval,
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eoVelocity < POT > &_velocity):
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continuator (_continuator),
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eval (_eval),
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loopEval(_eval),
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popEval(loopEval),
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velocity (_velocity),
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flight (dummyFlight){}
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/// Apply a few iteration of flight to the population (=swarm).
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virtual void operator () (eoPop < POT > &_pop)
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{
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try
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{
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// just to use a loop eval
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eoPop<POT> empty_pop;
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do
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{
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// perform velocity evaluation
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velocity.apply (_pop);
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// apply the flight
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flight.apply (_pop);
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// evaluate the position (with a loop eval, empty_swarm IS USELESS)
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loopEval(empty_pop,_pop);
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// update the topology (particle and local/global best(s))
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velocity.updateNeighborhood(_pop);
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}while (continuator (_pop));
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}
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catch (std::exception & e)
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{
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std::string s = e.what ();
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s.append (" in eoSyncEasyPSO");
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throw std::runtime_error (s);
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}
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}
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private:
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eoContinue < POT > &continuator;
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eoEvalFunc < POT > &eval;
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eoPopLoopEval<POT> loopEval;
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eoPopEvalFunc<POT>& popEval;
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eoVelocity < POT > &velocity;
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eoFlight < POT > &flight;
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// if the flight does not need to be used, use the dummy flight instance
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eoDummyFlight<POT> dummyFlight;
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};
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#endif /*_EOSYNCEASYPSO_H*/
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