all_faces_in.h

/*    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):       Siargey Kachanovich
 *
 *    Copyright (C) 2015 Inria
 *
 *    Modification(s):
 *      - YYYY/MM Author: Description of the modification
 */
 
#ifndef WITNESS_COMPLEX_ALL_FACES_IN_H_
#define WITNESS_COMPLEX_ALL_FACES_IN_H_
 
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_