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Diffstat (limited to 'trunk/src/Contraction/include/gudhi/Contraction/policies/Edge_length_cost.h')
-rw-r--r-- | trunk/src/Contraction/include/gudhi/Contraction/policies/Edge_length_cost.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/trunk/src/Contraction/include/gudhi/Contraction/policies/Edge_length_cost.h b/trunk/src/Contraction/include/gudhi/Contraction/policies/Edge_length_cost.h new file mode 100644 index 00000000..dac2d448 --- /dev/null +++ b/trunk/src/Contraction/include/gudhi/Contraction/policies/Edge_length_cost.h @@ -0,0 +1,56 @@ +/* This file is part of the Gudhi Library. The Gudhi library + * (Geometric Understanding in Higher Dimensions) is a generic C++ + * library for computational topology. + * + * Author(s): David Salinas + * + * Copyright (C) 2014 INRIA Sophia Antipolis-Mediterranee (France) + * + * This program 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. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef CONTRACTION_POLICIES_EDGE_LENGTH_COST_H_ +#define CONTRACTION_POLICIES_EDGE_LENGTH_COST_H_ + +#include <gudhi/Contraction/policies/Cost_policy.h> + +namespace Gudhi { + +namespace contraction { + +/** + * @brief return a cost corresponding to the squared length of the edge + */ +template< typename EdgeProfile> +class Edge_length_cost : public Cost_policy<EdgeProfile> { + public: + typedef typename Cost_policy<EdgeProfile>::Cost_type Cost_type; + typedef typename EdgeProfile::Point Point; + + Cost_type operator()(const EdgeProfile& profile, const boost::optional<Point>& placement) const override { + double res = 0; + auto p0_coord = profile.p0().begin(); + auto p1_coord = profile.p1().begin(); + for (; p0_coord != profile.p0().end(); p0_coord++, p1_coord++) { + res += (*p0_coord - *p1_coord) * (*p0_coord - *p1_coord); + } + return res; + } +}; + +} // namespace contraction + +} // namespace Gudhi + +#endif // CONTRACTION_POLICIES_EDGE_LENGTH_COST_H_ |