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Diffstat (limited to 'example/Contraction/Rips_contraction.cpp')
| -rw-r--r-- | example/Contraction/Rips_contraction.cpp | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/example/Contraction/Rips_contraction.cpp b/example/Contraction/Rips_contraction.cpp deleted file mode 100644 index 7f9b150a..00000000 --- a/example/Contraction/Rips_contraction.cpp +++ /dev/null @@ -1,98 +0,0 @@ -/* 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 - * - * 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/>. - */ -#include <gudhi/Edge_contraction.h> -#include <gudhi/Skeleton_blocker.h> -#include <gudhi/Off_reader.h> -#include <gudhi/Point.h> -#include <gudhi/Clock.h> - -#include <iostream> - -struct Geometry_trait { - typedef Point_d Point; -}; - -using Complex_geometric_traits = Gudhi::skeleton_blocker::Skeleton_blocker_simple_geometric_traits<Geometry_trait>; -using Complex = Gudhi::skeleton_blocker::Skeleton_blocker_geometric_complex< Complex_geometric_traits >; -using Profile = Gudhi::contraction::Edge_profile<Complex>; -using Complex_contractor = Gudhi::contraction::Skeleton_blocker_contractor<Complex>; - - -template<typename ComplexType> -void build_rips(ComplexType& complex, double offset) { - if (offset <= 0) return; - auto vertices = complex.vertex_range(); - for (auto p = vertices.begin(); p != vertices.end(); ++p) - for (auto q = p; ++q != vertices.end(); /**/) { - if (squared_dist(complex.point(*p), complex.point(*q)) < 4 * offset * offset) - complex.add_edge_without_blockers(*p, *q); - } -} - -int main(int argc, char *argv[]) { - if (argc != 3) { - std::cerr << "Usage " << argv[0] << " ../../../data/meshes/SO3_10000.off 0.3 to load the file " << - "../../data/SO3_10000.off and contract the Rips complex built with paremeter 0.3.\n"; - return -1; - } - - Complex complex; - - // load only the points - Gudhi::skeleton_blocker::Skeleton_blocker_off_reader<Complex> off_reader(argv[1], complex, true); - if (!off_reader.is_valid()) { - std::cerr << "Unable to read file:" << argv[1] << std::endl; - return EXIT_FAILURE; - } - - std::cout << "Build the Rips complex with " << complex.num_vertices() << " vertices" << std::endl; - - build_rips(complex, atof(argv[2])); - - Gudhi::Clock contraction_chrono("Time to simplify and enumerate simplices"); - - std::cout << "Initial complex has " << - complex.num_vertices() << " vertices and " << - complex.num_edges() << " edges" << std::endl; - - Complex_contractor contractor(complex, - new Gudhi::contraction::Edge_length_cost<Profile>, - Gudhi::contraction::make_first_vertex_placement<Profile>(), - Gudhi::contraction::make_link_valid_contraction<Profile>(), - Gudhi::contraction::make_remove_popable_blockers_visitor<Profile>()); - contractor.contract_edges(); - - std::cout << "Counting final number of simplices \n"; - unsigned num_simplices = std::distance(complex.complex_simplex_range().begin(), complex.complex_simplex_range().end()); - - std::cout << "Final complex has " << - complex.num_vertices() << " vertices, " << - complex.num_edges() << " edges, " << - complex.num_blockers() << " blockers and " << - num_simplices << " simplices" << std::endl; - - std::cout << contraction_chrono; - - return EXIT_SUCCESS; -} - - |