ihs.h

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 *   Copyright (C) 2004-2015 The PaGMO development team,                     *
 *   Advanced Concepts Team (ACT), European Space Agency (ESA)               *
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#ifndef PAGMO_ALGORITHM_IHS_H
#define PAGMO_ALGORITHM_IHS_H

#include <cstddef>
#include <iostream>
#include <string>

#include "../config.h"
#include "../population.h"
#include "../serialization.h"
#include "../types.h"
#include "base.h"

namespace pagmo { namespace algorithm {

// TODO: automatic reshuffling when the population becomes too homogeneous.

class __PAGMO_VISIBLE ihs: public base
{
        public:
                ihs(int gen = 1, const double &phmcr = 0.85, const double &ppar_min = 0.35, const double &ppar_max = 0.99,
                        const double &bw_min = 1E-5, const double &bw_max = 1);
                base_ptr clone() const;
                void evolve(population &) const;
                std::string get_name() const;
        protected:
                std::string human_readable_extra() const;
        private:
                friend class boost::serialization::access;
                template <class Archive>
                void serialize(Archive &ar, const unsigned int)
                {
                        ar & boost::serialization::base_object<base>(*this);
                        ar & const_cast<std::size_t &>(m_gen);
                        ar & const_cast<double &>(m_phmcr);
                        ar & const_cast<double &>(m_ppar_min);
                        ar & const_cast<double &>(m_ppar_max);
                        ar & const_cast<double &>(m_bw_min);
                        ar & const_cast<double &>(m_bw_max);
                }
                // Number of generations.
                const std::size_t               m_gen;
                // Rate of choosing from memory (i.e., from population).
                const double                    m_phmcr;
                // Minimum pitch adjustment rate.
                const double                    m_ppar_min;
                // Maximum pitch adjustment rate.
                const double                    m_ppar_max;
                // Mininum distance bandwidth.
                const double                    m_bw_min;
                // Maximum distance bandwidth.
                const double                    m_bw_max;
};

}} //namespaces

BOOST_CLASS_EXPORT_KEY(pagmo::algorithm::ihs)

#endif