146 lines
4 KiB
C++
146 lines
4 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// eoVelocityInit.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 EOVELOCITYINIT_H
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#define EOVELOCITYINIT_H
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#include <algorithm>
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#include <eoOp.h>
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#include <eoSTLFunctor.h>
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#include <utils/eoRndGenerators.h>
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/**
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@addtogroup Initializators
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@{
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*/
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/** Abstract class for velocities initilization of particle swarm optimization.*/
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template < class POT > class eoVelocityInit:public eoInit < POT >
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{
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public:
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virtual std::string className (void) const
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{
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return "eoVelocityInit";
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}
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};
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/**
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* Provides a particle initialized thanks to the eoVelocityInit object given.
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*/
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template < class POT > class eoVelocityInitGenerator:public eoF < POT >
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{
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public:
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/** Ctor from a plain eoVelocityInit */
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eoVelocityInitGenerator (eoVelocityInit < POT > &_init):init (_init){}
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virtual POT operator () ()
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{
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POT p;
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init (p);
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return (p);
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}
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private:
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eoVelocityInit < POT > &init;
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};
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/**
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Initializer for fixed length velocities with a single type
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*/
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template < class POT > class eoVelocityInitFixedLength:public eoVelocityInit <
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POT >
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{
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public:
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typedef typename POT::ParticleVelocityType VelocityType;
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eoVelocityInitFixedLength (unsigned _combien,
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eoRndGenerator < VelocityType >
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&_generator):combien (_combien),
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generator (_generator)
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{
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}
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virtual void operator () (POT & chrom)
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{
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chrom.resize (combien);
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std::generate (chrom.velocities.begin (), chrom.velocities.end (),
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generator);
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}
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private:
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unsigned combien;
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/// generic wrapper for eoFunctor (s), to make them have the function-pointer style copy semantics
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eoSTLF < VelocityType > generator;
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};
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/**
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Initializer for variable length velocitys with a single type
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*/
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template < class POT > class eoVelocityInitVariableLength:public eoVelocityInit <
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POT >
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{
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public:
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typedef typename POT::ParticleVelocityType VelocityType;
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/** Ctor from an eoVelocityInit */
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eoVelocityInitVariableLength (unsigned _minSize, unsigned _maxSize,
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eoVelocityInit < VelocityType >
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&_init):offset (_minSize),
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extent (_maxSize - _minSize), init (_init)
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{
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if (_minSize >= _maxSize)
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throw std::
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logic_error
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("eoVelocityInitVariableLength: minSize larger or equal to maxSize");
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}
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virtual void operator () (POT & _chrom)
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{
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_chrom.resizeVelocities (offset + rng.random (extent));
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typename std::vector < VelocityType >::iterator it;
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for (it = _chrom.velocities.begin (); it < _chrom.velocities.end (); it++)
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init (*it);
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}
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// accessor to the atom initializer (needed by operator constructs sometimes)
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eoInit < VelocityType > &atomInit ()
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{
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return init;
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}
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private:
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unsigned offset;
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unsigned extent;
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eoVelocityInit < VelocityType > &init;
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};
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#endif /*EOVELOCITYINIT_H */
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/** @} */
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