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Diffstat (limited to 'src/Contraction/include/gudhi/Contraction/policies/Edge_length_cost.h')
-rw-r--r-- | src/Contraction/include/gudhi/Contraction/policies/Edge_length_cost.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/Contraction/include/gudhi/Contraction/policies/Edge_length_cost.h b/src/Contraction/include/gudhi/Contraction/policies/Edge_length_cost.h new file mode 100644 index 00000000..97589385 --- /dev/null +++ b/src/Contraction/include/gudhi/Contraction/policies/Edge_length_cost.h @@ -0,0 +1,44 @@ +/* This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT. + * See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details. + * Author(s): David Salinas + * + * Copyright (C) 2014 Inria + * + * Modification(s): + * - YYYY/MM Author: Description of the modification + */ + +#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_ |