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/* 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): Siargey Kachanovich
*
* Copyright (C) 2015 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/>.
*/
#ifndef WITNESS_COMPLEX_ALL_FACES_IN_H_
#define WITNESS_COMPLEX_ALL_FACES_IN_H_
/* \brief Check if the facets of the k-dimensional simplex witnessed
* by witness witness_id are already in the complex.
* inserted_vertex is the handle of the (k+1)-th vertex witnessed by witness_id
*/
template < typename SimplicialComplexForWitness,
typename Simplex >
bool all_faces_in(Simplex& simplex,
double* filtration_value,
SimplicialComplexForWitness& sc) {
typedef typename SimplicialComplexForWitness::Simplex_handle Simplex_handle;
if (simplex.size() == 1)
return true; /* Add vertices unconditionally */
Simplex facet;
for (typename Simplex::iterator not_it = simplex.begin(); not_it != simplex.end(); ++not_it) {
facet.clear();
for (typename Simplex::iterator it = simplex.begin(); it != simplex.end(); ++it)
if (it != not_it)
facet.push_back(*it);
Simplex_handle facet_sh = sc.find(facet);
if (facet_sh == sc.null_simplex())
return false;
else if (sc.filtration(facet_sh) > *filtration_value)
*filtration_value = sc.filtration(facet_sh);
}
return true;
}
#endif // WITNESS_COMPLEX_ALL_FACES_IN_H_
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