c496c12f40
git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@386 331e1502-861f-0410-8da2-ba01fb791d7f
86 lines
2.3 KiB
C++
86 lines
2.3 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// FlowShopOpMutationShift.h
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// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007
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/*
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This library...
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Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
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*/
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//-----------------------------------------------------------------------------
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#ifndef FLOWSHOPOPMUTATIONSHIFT_H_
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#define FLOWSHOPOPMUTATIONSHIFT_H_
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#include <eoOp.h>
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#include "FlowShop.h"
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/**
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* Functor
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* Shift mutation operator for flow-shop
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*/
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class FlowShopOpMutationShift: public eoMonOp<FlowShop> {
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public:
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/**
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* default constructor
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*/
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FlowShopOpMutationShift() {}
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/**
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* the class name (used to display statistics)
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*/
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string className() const {
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return "FlowShopOpMutationShift";
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}
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/**
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* modifies the parent with a shift mutation
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* @param FlowShop & _genotype the parent genotype (will be modified)
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*/
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bool operator()(FlowShop & _genotype) {
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bool isModified;
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int direction;
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unsigned tmp;
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// schedulings
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vector<unsigned> initScheduling = _genotype.getScheduling();
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vector<unsigned> resultScheduling = initScheduling;
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// computation of the 2 random points
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unsigned point1, point2;
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do {
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point1 = rng.random(resultScheduling.size());
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point2 = rng.random(resultScheduling.size());
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} while (point1 == point2);
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// direction
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if (point1 < point2) direction = 1;
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else direction = -1;
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// mutation
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tmp = resultScheduling[point1];
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for (unsigned i=point1 ; i!=point2 ; i+=direction)
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resultScheduling[i] = resultScheduling[i+direction];
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resultScheduling[point2] = tmp;
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// update (if necessary)
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if (resultScheduling != initScheduling) {
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// update
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_genotype.setScheduling(resultScheduling);
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// the genotype has been modified
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isModified = true;
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}
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else {
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// the genotype has not been modified
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isModified = false;
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}
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// return 'true' if the genotype has been modified
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return isModified;
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}
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};
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#endif /*FLOWSHOPOPMUTATIONSHIFT_H_*/
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