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Diffstat (limited to 'src/GudhUI/utils/Edge_contractor.h')
| -rw-r--r-- | src/GudhUI/utils/Edge_contractor.h | 158 |
1 files changed, 85 insertions, 73 deletions
diff --git a/src/GudhUI/utils/Edge_contractor.h b/src/GudhUI/utils/Edge_contractor.h index d0a1f866..45079a40 100644 --- a/src/GudhUI/utils/Edge_contractor.h +++ b/src/GudhUI/utils/Edge_contractor.h @@ -1,85 +1,97 @@ -/* - * Contractor.h +/* This file is part of the Gudhi Library. The Gudhi library + * (Geometric Understanding in Higher Dimensions) is a generic C++ + * library for computational topology. * - * Created on: Sep 25, 2014 - * Author: dsalinas + * 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 EDGE_CONTRACTOR_H_ -#define EDGE_CONTRACTOR_H_ +#ifndef UTILS_EDGE_CONTRACTOR_H_ +#define UTILS_EDGE_CONTRACTOR_H_ -#include "gudhi/Skeleton_blocker_contractor.h" - -#include "gudhi/Contraction/Edge_profile.h" -#include "gudhi/Contraction/policies/Cost_policy.h" +#include <gudhi/Skeleton_blocker_contractor.h> +#include <gudhi/Contraction/Edge_profile.h> +#include <gudhi/Contraction/policies/Cost_policy.h> +#include <vector> /** * Iteratively puts every vertex at the center of its neighbors */ -template<typename SkBlComplex> class Edge_contractor{ -private: - SkBlComplex& complex_; - unsigned num_contractions_; - - /** - * @brief return a cost corresponding to the squared length of the edge - */ - template< typename EdgeProfile> class Length_cost : public contraction::Cost_policy<EdgeProfile>{ - public: - typedef typename contraction::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{ - Cost_type res; - if(!placement) return res; - return Geometry_trait::Squared_distance_d()(profile.p0(),profile.p1()); //not working?? - } - }; - - - /** - * @brief return a cost corresponding to the squared length of the edge - */ - template< typename EdgeProfile> class Middle_placement : public contraction::Placement_policy<EdgeProfile>{ - public: - typedef typename contraction::Placement_policy<EdgeProfile>::Placement_type Placement_type; - typedef typename EdgeProfile::Point Point; - Placement_type operator()(const EdgeProfile& profile) const override{ - std::vector<double> mid_coords(profile.p0().dimension(),0); - for (size_t i = 0; i < profile.p0().dimension(); ++i){ - mid_coords[i] = (profile.p0()[i] + profile.p1()[i]) / 2.; - } - return Point(profile.p0().dimension(),mid_coords.begin(), mid_coords.end()); - } - }; - - public: - typedef typename SkBlComplex::Vertex_handle Vertex_handle; - typedef typename SkBlComplex::Edge_handle Edge_handle; - - /** - * @brief Modify complex to be the expansion of the k-nearest neighbor - * symetric graph. - */ - Edge_contractor(SkBlComplex& complex,unsigned num_contractions): - complex_(complex),num_contractions_(num_contractions) - { - typedef typename contraction::Edge_profile<Complex> Profile; - num_contractions = (std::min)((int)num_contractions,(int)(complex_.num_vertices()-1)); - contraction::Skeleton_blocker_contractor<Complex> contractor( - complex_, - new Length_cost<contraction::Edge_profile<Complex>>(), - new Middle_placement<contraction::Edge_profile<Complex>>(), - contraction::make_link_valid_contraction<Profile>(), - contraction::make_remove_popable_blockers_visitor<Profile>() - ); - contractor.contract_edges(num_contractions); - } - - +template<typename SkBlComplex> class Edge_contractor { + private: + SkBlComplex& complex_; + unsigned num_contractions_; + + /** + * @brief return a cost corresponding to the squared length of the edge + */ + template< typename EdgeProfile> class Length_cost : public contraction::Cost_policy<EdgeProfile> { + public: + typedef typename contraction::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 { + Cost_type res; + if (!placement) + return res; + return Geometry_trait::Squared_distance_d()(profile.p0(), profile.p1()); // not working?? + } + }; + + /** + * @brief return a cost corresponding to the squared length of the edge + */ + template< typename EdgeProfile> class Middle_placement : public contraction::Placement_policy<EdgeProfile> { + public: + typedef typename contraction::Placement_policy<EdgeProfile>::Placement_type Placement_type; + typedef typename EdgeProfile::Point Point; + + Placement_type operator()(const EdgeProfile& profile) const override { + std::vector<double> mid_coords(profile.p0().dimension(), 0); + for (size_t i = 0; i < profile.p0().dimension(); ++i) { + mid_coords[i] = (profile.p0()[i] + profile.p1()[i]) / 2.; + } + return Point(profile.p0().dimension(), mid_coords.begin(), mid_coords.end()); + } + }; + + public: + typedef typename SkBlComplex::Vertex_handle Vertex_handle; + typedef typename SkBlComplex::Edge_handle Edge_handle; + + /** + * @brief Modify complex to be the expansion of the k-nearest neighbor + * symetric graph. + */ + Edge_contractor(SkBlComplex& complex, unsigned num_contractions) : + complex_(complex), num_contractions_(num_contractions) { + typedef typename contraction::Edge_profile<Complex> Profile; + num_contractions = (std::min)(static_cast<int>(num_contractions), static_cast<int>(complex_.num_vertices() - 1)); + typedef typename contraction::Skeleton_blocker_contractor<Complex> Contractor; + Contractor contractor(complex_, + new Length_cost<contraction::Edge_profile < Complex >> (), + new Middle_placement<contraction::Edge_profile < Complex >> (), + contraction::make_link_valid_contraction<Profile>(), + contraction::make_remove_popable_blockers_visitor<Profile>()); + contractor.contract_edges(num_contractions); + } }; - - -#endif /* EDGE_CONTRACTOR_H_ */ +#endif // UTILS_EDGE_CONTRACTOR_H_ |