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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) 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/>.
*/
#ifndef CONCEPT_WITNESS_COMPLEX_SIMPLICIAL_COMPLEX_FOR_WITNESS_H_
#define CONCEPT_WITNESS_COMPLEX_SIMPLICIAL_COMPLEX_FOR_WITNESS_H_
namespace Gudhi {
namespace witness_complex {
/** \brief The concept SimplicialComplexForWitness describes the requirements
* for a type to implement a simplicial complex,
* used for example to build a Witness_complex or Strong_witness_complex.
*/
struct SimplicialComplexForWitness {
/** Handle to specify a simplex. */
typedef unspecified Simplex_handle;
// /** Handle to specify a vertex. Must be a non-negative integer. */
// typedef unspecified Vertex_handle;
/** \brief Returns a Simplex_hanlde that is different from all simplex handles
* of the simplices. */
Simplex_handle null_simplex();
/** Returns the number of vertices in the simplicial complex
*/
std::size_t num_vertices();
/** \brief Return type of an insertion of a simplex
*/
typedef unspecified Insertion_result_type;
/** \brief Inserts a simplex with vertices from a given range
* 'vertex_range' in the simplicial complex.
* The function is only used in Witness_complex class
* and by construction, it is not necessary to check if
* the faces are in the simplicial complex before insertion.
* The simplex is given the filtration value 'filtration'.
* Filtration_value should be convertible from double.
* The return type is not used.
* */
template< typedef Input_vertex_range >
Insertion_result_type insert_simplex(Input_vertex_range const & vertex_range, Filtration_value filtration);
/** \brief Inserts a simplex and all its faces
* with vertices from a given range
* 'vertex_range' in the simplicial complex.
* The function is only used in Strong_witness_complex class.
* All inserted simplices are given the filtration
* value 'filtration'.
* Filtration_value should be convertible from double.
* The return type is not used.
*/
template< typedef Input_vertex_range,
typedef Filtration_value>
Insertion_result_type insert_simplex_and_subfaces(Input_vertex_range const & vertex_range, Filtration_value filtration);
/** \brief Finds a simplex with vertices given by a range
*
* If a simplex exists, its Simplex_handle is returned.
* Otherwise null_simplex() is returned. */
template< typedef Input_vertex_range >
Simplex_handle find(Input_vertex_range const & vertex_range);
/** \brief Sets the dimension of the simplicial complex to
* 'dimension'.
*/
void set_dimension(int dimension);
/** \brief Returns the filtration of the simplex given by
* the simplex handle 'sh'.
*/
double filtration(Simplex_handle sh);
};
} // namespace witness_complex
} // namespace Gudhi
#endif // CONCEPT_WITNESS_COMPLEX_SIMPLICIAL_COMPLEX_FOR_WITNESS_H_
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