NaiveOnePointCrossover.h

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//
// Struct NaiveOnePointCrossover
//
// Copyright (c) 2010 - 2013, Yves Ineichen, ETH Zürich
// All rights reserved
//
// Implemented as part of the PhD thesis
// "Toward massively parallel multi-objective optimization with application to
// particle accelerators" (https://doi.org/10.3929/ethz-a-009792359)
//
// This file is part of OPAL.
//
// OPAL is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// You should have received a copy of the GNU General Public License
// along with OPAL. If not, see <https://www.gnu.org/licenses/>.
//
#include "Util/CmdArguments.h"

template <class T> struct NaiveOnePointCrossover
{
    void crossover(std::shared_ptr<T> ind1, std::shared_ptr<T> ind2,
                   CmdArguments_t /*args*/) {

        typedef typename T::genes_t genes_t;
        genes_t genes_ind2;
        genes_ind2 = ind2->genes_m;

        // determine crossover position u.a.r.
        size_t position = static_cast<size_t>(
            ((double) ind1->genes_m.size() * (double) rand() / (RAND_MAX + 1.0))
        );

        for(size_t i = position; i < ind1->genes_m.size(); i++) {
            ind2->genes_m[i] = ind1->genes_m[i];
            ind1->genes_m[i] = genes_ind2[i];
        }
    }
};