cassini_2.cpp

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 *   Copyright (C) 2004-2015 The PaGMO development team,                     *
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#include <string>
#include <keplerian_toolbox/epoch.h>

#include "cassini_2.h"
#include "../AstroToolbox/mga_dsm.h"
#include "../AstroToolbox/misc4Tandem.h"


namespace pagmo { namespace problem {

const int cassini_2::sequence[6] = {3, 2, 2, 3, 5, 6};


cassini_2::cassini_2():base(22), problem(total_DV_rndv,sequence,6,0,0,0,0,0)
{
        const double lb[22] = {-1000, 3, 0, 0, 100, 100, 30, 400, 800, 0.01, 0.01, 0.01, 0.01, 0.01, 1.05, 1.05, 1.15, 1.7, -M_PI, -M_PI, -M_PI, -M_PI};
        const double ub[22] = {0,  5, 1, 1, 400, 500, 300, 1600, 2200, 0.9, 0.9, 0.9, 0.9, 0.9, 6, 6, 6.5, 291, M_PI, M_PI, M_PI, M_PI};
        set_bounds(lb,lb+22,ub,ub+22);
}

base_ptr cassini_2::clone() const
{
        return base_ptr(new cassini_2(*this));
}

void cassini_2::objfun_impl(fitness_vector &f, const decision_vector &x) const
{
        MGA_DSM(x, problem,f[0]);
}


std::string cassini_2::pretty(const std::vector<double> &x) const
{
        double obj = 0;
        MGA_DSM(x, problem, obj);
        std::ostringstream s;
        s.precision(15);
        s << std::scientific;
        const size_t seq_size = (x.size() + 2) / 4;
        pagmo_assert((x.size() + 2) % 4 == 0 && seq_size >= 2);
        pagmo_assert(problem.sequence.size() == seq_size);
        s << "Flyby sequence:\t\t\t";
        for (size_t i = 0; i < seq_size; ++i) {
                s << problem.sequence[i];
        }
        s << '\n';
        s << "Departure epoch (mjd2000):\t" << x[0] << '\n';
        s << "Departure epoch:\t\t" << ::kep_toolbox::epoch(x[0],::kep_toolbox::epoch::MJD2000) << '\n';
        s << "Vinf polar components:\t\t";
        for (size_t i = 0; i < 3; ++i) {
                s << x[i + 1] << ' ';
        }
        s << '\n';
        double totaltime = 0;
        for (size_t i = 0; i < seq_size - 1; ++i) {
                s << "Leg time of flight:\t\t" << x[i + 4] << '\n';
                totaltime += x[i + 4];
        }
        s << "Total time of flight:\t\t" << totaltime << '\n';
        for (size_t i = 0; i < seq_size - 2; ++i) {
                s << "Flyby radius:\t\t\t" << x[i + 2 * (seq_size + 1)] << '\n';
        }
        totaltime=x[0];
        for (size_t i = 0; i < seq_size - 2; ++i) {
        totaltime += x[i + 4];
                s << "Flyby date:\t\t\t" << ::kep_toolbox::epoch(totaltime,::kep_toolbox::epoch::MJD2000) << '\n';
        }
        for (size_t i = 0; i < seq_size - 2; ++i) {
                s << "Vinf at flyby:\t\t\t" << std::sqrt(problem.vrelin_vec[i]) << '\n';
        }
        for (size_t i = 0; i < seq_size - 1; ++i) {
                s << "dsm" << i+1 << ":\t\t\t\t" << problem.DV[i+1] << '\n';
        }
        s << "Final DV:\t\t\t" << problem.DV.back() << '\n';
        return s.str();
}


void cassini_2::set_sparsity(int &lenG, std::vector<int> &iGfun, std::vector<int> &jGvar) const
{
        lenG=22;
        iGfun.resize(22);
        jGvar.resize(22);
        for (int i = 0; i<lenG; ++i)
        {
                iGfun[i] = 0;
                jGvar[i] = i;
        }
}

std::string cassini_2::get_name() const
{
        return "Cassini 2";
}

}} //namespaces

BOOST_CLASS_EXPORT_IMPLEMENT(pagmo::problem::cassini_2)