Loading...
Searching...
No Matches
Skeleton_blocker_from_simplices.cpp
/* 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
*/
#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::clog << "Simplices:" << std::endl;
for (const Simplex & s : complex.complex_simplex_range())
std::clog << s << " ";
std::clog << std::endl;
// One blocker as simplex 0123 is not in the complex but all its proper faces are.
std::clog << "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::clog << "Simplices:" << std::endl;
for (const Simplex & s : complex.complex_simplex_range())
std::clog << s << " ";
std::clog << std::endl;
// One blocker as simplex 012 is not in the complex but all its proper faces are.
std::clog << "Blockers: " << complex.blockers_to_string() << std::endl;
return EXIT_SUCCESS;
}
Gudhi::skeleton_blocker::Skeleton_blocker_complex
Abstract Simplicial Complex represented with a skeleton/blockers pair.
Definition Skeleton_blocker_complex.h:51
Gudhi::skeleton_blocker::Skeleton_blocker_complex::complex_simplex_range
Complex_simplex_range complex_simplex_range() const
Returns a Complex_simplex_range over all the simplices of the complex.
Definition Skeleton_blocker_complex.h:1429
Gudhi::skeleton_blocker::Skeleton_blocker_simple_traits
Simple traits that is a model of SkeletonBlockerDS and can be passed as a template argument to Skelet...
Definition Skeleton_blocker_simple_traits.h:29