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Diffstat (limited to 'trunk/src/Skeleton_blocker/example/Skeleton_blocker_from_simplices.cpp')
-rw-r--r-- | trunk/src/Skeleton_blocker/example/Skeleton_blocker_from_simplices.cpp | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/trunk/src/Skeleton_blocker/example/Skeleton_blocker_from_simplices.cpp b/trunk/src/Skeleton_blocker/example/Skeleton_blocker_from_simplices.cpp new file mode 100644 index 00000000..076c6a53 --- /dev/null +++ b/trunk/src/Skeleton_blocker/example/Skeleton_blocker_from_simplices.cpp @@ -0,0 +1,77 @@ +/* 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/Skeleton_blocker.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string> +#include <fstream> +#include <sstream> +#include <vector> + +typedef Gudhi::skeleton_blocker::Skeleton_blocker_simple_traits Traits; +typedef Gudhi::skeleton_blocker::Skeleton_blocker_complex<Traits> Complex; +typedef Complex::Vertex_handle Vertex_handle; +typedef Complex::Simplex Simplex; + +int main(int argc, char *argv[]) { + std::vector<Simplex> simplices; + + // add 4 triangles of a tetrahedron 0123 + simplices.push_back(Simplex(Vertex_handle(0), Vertex_handle(1), Vertex_handle(2))); + simplices.push_back(Simplex(Vertex_handle(1), Vertex_handle(2), Vertex_handle(3))); + simplices.push_back(Simplex(Vertex_handle(3), Vertex_handle(0), Vertex_handle(2))); + simplices.push_back(Simplex(Vertex_handle(3), Vertex_handle(0), Vertex_handle(1))); + + // get complex from top faces + Complex complex(Gudhi::skeleton_blocker::make_complex_from_top_faces<Complex>(simplices.begin(), simplices.end())); + + + std::cout << "Simplices:" << std::endl; + for (const Simplex & s : complex.complex_simplex_range()) + std::cout << s << " "; + std::cout << std::endl; + + // One blocker as simplex 0123 is not in the complex but all its proper faces are. + std::cout << "Blockers: " << complex.blockers_to_string() << std::endl; + + // now build a complex from its full list of simplices + simplices.clear(); + simplices.push_back(Simplex(Vertex_handle(0))); + simplices.push_back(Simplex(Vertex_handle(1))); + simplices.push_back(Simplex(Vertex_handle(2))); + simplices.push_back(Simplex(Vertex_handle(0), Vertex_handle(1))); + simplices.push_back(Simplex(Vertex_handle(1), Vertex_handle(2))); + simplices.push_back(Simplex(Vertex_handle(2), Vertex_handle(0))); + complex = Complex(simplices.begin(), simplices.end()); + + std::cout << "Simplices:" << std::endl; + for (const Simplex & s : complex.complex_simplex_range()) + std::cout << s << " "; + std::cout << std::endl; + + // One blocker as simplex 012 is not in the complex but all its proper faces are. + std::cout << "Blockers: " << complex.blockers_to_string() << std::endl; + + return EXIT_SUCCESS; +} |