88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// eoSteadyStateTransform.h
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// (c) Maarten Keijzer 2000, GeNeura Team, 1998
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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: todos@geneura.ugr.es, http://geneura.ugr.es
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*/
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//-----------------------------------------------------------------------------
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#ifndef eoSteadyStateTransform_h
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#define eoSteadyStateTransform_h
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//-----------------------------------------------------------------------------
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#include <eoAlgo.h> // eoPop
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#include <eoEvalFunc.h>
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#include <eoGOpSelector.h>
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#include <eoIndiSelector.h>
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#include <eoSteadyStateInserter.h>
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//-----------------------------------------------------------------------------
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/** eoSteadyStateTransform
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* Single step of a steady state evolutionary algorithm.
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* Proceeds by updating one individual at a time, by first selecting parents,
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* creating one or more children and subsequently overwrite (a) bad individual(s)
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*/
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template<class EOT> class eoSteadyStateTransform: public eoTransform<EOT>
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{
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public:
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/// Constructor.
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eoSteadyStateTransform(
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eoGOpSelector<EOT>& _opSelector,
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eoSelectOne<EOT>& _selector,
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eoSteadyStateInserter<EOT>& _inserter,
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unsigned _steps = 0) :
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opSelector(_opSelector),
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selector(_selector),
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inserter(_inserter) ,
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steps(_steps) {};
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/// Apply one generation of evolution to the population.
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virtual void operator()(eoPop<EOT>& pop)
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{
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unsigned nSteps = steps;
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if (nSteps == 0)
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{
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nSteps = pop.size(); // make a 'generation equivalent'
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}
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for (unsigned i = 0; i < nSteps; ++i)
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{
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selector.bind(pop);
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inserter.bind(pop);
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opSelector.selectOp()(selector, inserter);
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}
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}
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private:
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eoGOpSelector<EOT>& opSelector;
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eoSelectOneIndiSelector<EOT> selector;
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eoSteadyStateInserter<EOT>& inserter;
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unsigned steps;
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};
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//-----------------------------------------------------------------------------
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#endif eoGeneration_h
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