letter.ipp

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/***************************************************************************
*                                                                          *
*   Copyright (C) 2018 by David B. Blumenthal                              *
*                                                                          *
*   This file is part of GEDLIB.                                           *
*                                                                          *
*   GEDLIB is free software: you can redistribute it and/or modify it      *
*   under the terms of the GNU Lesser General Public License as published  *
*   by the Free Software Foundation, either version 3 of the License, or   *
*   (at your option) any later version.                                    *
*                                                                          *
*   GEDLIB is distributed in the hope that it will be useful,              *
*   but WITHOUT ANY WARRANTY; without even the implied warranty of         *
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the           *
*   GNU Lesser General Public License for more details.                    *
*                                                                          *
*   You should have received a copy of the GNU Lesser General Public       *
*   License along with GEDLIB. If not, see <http://www.gnu.org/licenses/>. *
*                                                                          *
***************************************************************************/

#ifndef SRC_EDIT_COSTS_LETTER_IPP_
#define SRC_EDIT_COSTS_LETTER_IPP_

namespace ged {

template<>
Letter<GXLLabel, GXLLabel>::
~Letter() {}

template<>
Letter<GXLLabel, GXLLabel>::
Letter(double node_ins_del_cost, double edge_ins_del_cost, double alpha) :
node_ins_del_cost_{node_ins_del_cost},
edge_ins_del_cost_{edge_ins_del_cost},
alpha_{alpha} {}

template<>
double
Letter<GXLLabel, GXLLabel>::
node_ins_cost_fun(const GXLLabel & node_label) const {
    return alpha_ * node_ins_del_cost_;
}

template<>
double
Letter<GXLLabel, GXLLabel>::
node_del_cost_fun(const GXLLabel & node_label) const {
    return alpha_ * node_ins_del_cost_;
}

template<>
double
Letter<GXLLabel, GXLLabel>::
node_rel_cost_fun(const GXLLabel & node_label_1, const GXLLabel & node_label_2) const {
    double x_l_minus_x_r(std::stod(node_label_1.at("x")) - std::stod(node_label_2.at("x")));
    double y_l_minus_y_r(std::stod(node_label_1.at("y")) - std::stod(node_label_2.at("y")));
    return alpha_ * std::sqrt(std::pow(x_l_minus_x_r, 2) + std::pow(y_l_minus_y_r, 2));
}

template<>
double
Letter<GXLLabel, GXLLabel>::
edge_ins_cost_fun(const GXLLabel & edge_label) const {
    return (1 - alpha_) * edge_ins_del_cost_;
}

template<>
double
Letter<GXLLabel, GXLLabel>::
edge_del_cost_fun(const GXLLabel & edge_label) const {
    return (1 - alpha_) * edge_ins_del_cost_;
}

template<>
double
Letter<GXLLabel, GXLLabel>::
edge_rel_cost_fun(const GXLLabel & edge_label_1, const GXLLabel & edge_label_2) const {
    return 0.0;
}

}

#endif /* SRC_EDIT_COSTS_LETTER_IPP_ */