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// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
//-----------------------------------------------------------------------------
// eoShiftMutation.h
// (c) GeNeura Team, 2000 - EEAAX 2000 - Maarten Keijzer 2000
// (c) INRIA Futurs - Dolphin Team - Thomas Legrand 2007
/*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact: todos@geneura.ugr.es, http://geneura.ugr.es
thomas.legrand@lifl.fr
Marc.Schoenauer@polytechnique.fr
mak@dhi.dk
*/
//-----------------------------------------------------------------------------
#ifndef eoShiftMutation_h
#define eoShiftMutation_h
//-----------------------------------------------------------------------------
/**
* Shift two components of a chromosome.
*
* @ingroup Variators
*/
template<class EOT> class eoShiftMutation: public eoMonOp<EOT>
{
public:
typedef typename EOT::AtomType GeneType;
/// CTor
eoShiftMutation(){}
/// The class name.
virtual std::string className() const { return "eoShiftMutation"; }
/**
* Shift two components of the given eoosome.
* @param _eo The cromosome which is going to be changed.
*/
bool operator()(EOT& _eo)
{
unsigned i, j, from, to;
GeneType tmp;
// generate two different indices
i=eo::rng.random(_eo.size());
do j = eo::rng.random(_eo.size()); while (i == j);
// indexes
from=std::min(i,j);
to=std::max(i,j);
// keep the first component to change
tmp=_eo[to];
// shift
for(unsigned int k=to ; k > from ; k--)
_eo[k]=_eo[k-1];
// shift the first component
_eo[from]=tmp;
return true;
}
};
/** @example t-eoShiftMutation.cpp
*/
//-----------------------------------------------------------------------------
#endif
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