79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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// "FlowShopInit.h"
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// (c) OPAC Team, LIFL, March 2006
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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: Arnaud.Liefooghe@lifl.fr
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*/
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#ifndef _FlowShopInit_h
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#define _FlowShopInit_h
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#include <eoInit.h>
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/**
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* Functor
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* Initialisation of a random genotype built by the default constructor of the eoFlowShop class
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*/
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class FlowShopInit:public eoInit < FlowShop >
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{
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public:
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/**
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* constructor
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* @param const unsigned _N the number of jobs to schedule
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*/
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FlowShopInit (const unsigned _N)
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{
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N = _N;
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}
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/**
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* randomize a genotype
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* @param FlowShop & _genotype a genotype that has been default-constructed
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*/
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void operator () (FlowShop & _genotype)
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{
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// scheduling vector
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vector < unsigned >scheduling (N);
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// initialisation of possible values
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vector < unsigned >possibles (N);
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for (unsigned i = 0; i < N; i++)
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possibles[i] = i;
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// random initialization
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unsigned rInd; // random index
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for (unsigned i = 0; i < N; i++)
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{
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rInd = (unsigned) rng.uniform (N - i);
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scheduling[i] = possibles[rInd];
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possibles[rInd] = possibles[N - i - 1];
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}
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_genotype.setScheduling (scheduling);
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_genotype.invalidate (); // IMPORTANT in case the _genotype is old
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}
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private:
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/** the number of jobs (size of a scheduling vector) */
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unsigned N;
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};
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#endif
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