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+/* 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): Vincent Rouvreau
+ *
+ * Copyright (C) 2016 Inria
+ *
+ * Modification(s):
+ * - YYYY/MM Author: Description of the modification
+ */
+
+#ifndef INCLUDE_SIMPLEX_TREE_INTERFACE_H_
+#define INCLUDE_SIMPLEX_TREE_INTERFACE_H_
+
+#include <gudhi/graph_simplicial_complex.h>
+#include <gudhi/distance_functions.h>
+#include <gudhi/Simplex_tree.h>
+#include <gudhi/Points_off_io.h>
+
+#include "Persistent_cohomology_interface.h"
+
+#include <iostream>
+#include <vector>
+#include <utility> // std::pair
+
+namespace Gudhi {
+
+template<typename SimplexTreeOptions = Simplex_tree_options_full_featured>
+class Simplex_tree_interface : public Simplex_tree<SimplexTreeOptions> {
+ public:
+ using Base = Simplex_tree<SimplexTreeOptions>;
+ using Filtration_value = typename Base::Filtration_value;
+ using Vertex_handle = typename Base::Vertex_handle;
+ using Simplex_handle = typename Base::Simplex_handle;
+ using Insertion_result = typename std::pair<Simplex_handle, bool>;
+ using Simplex = std::vector<Vertex_handle>;
+ using Filtered_simplices = std::vector<std::pair<Simplex, Filtration_value>>;
+
+ public:
+ bool find_simplex(const Simplex& vh) {
+ return (Base::find(vh) != Base::null_simplex());
+ }
+
+ void assign_simplex_filtration(const Simplex& vh, Filtration_value filtration) {
+ Base::assign_filtration(Base::find(vh), filtration);
+ }
+
+ bool insert(const Simplex& simplex, Filtration_value filtration = 0) {
+ Insertion_result result = Base::insert_simplex_and_subfaces(simplex, filtration);
+ return (result.second);
+ }
+
+ // Do not interface this function, only used in alpha complex interface for complex creation
+ bool insert_simplex(const Simplex& simplex, Filtration_value filtration = 0) {
+ Insertion_result result = Base::insert_simplex(simplex, filtration);
+ return (result.second);
+ }
+
+ // Do not interface this function, only used in interface for complex creation
+ bool insert_simplex_and_subfaces(const Simplex& simplex, Filtration_value filtration = 0) {
+ Insertion_result result = Base::insert_simplex_and_subfaces(simplex, filtration);
+ return (result.second);
+ }
+
+ // Do not interface this function, only used in strong witness interface for complex creation
+ bool insert_simplex(const std::vector<std::size_t>& simplex, Filtration_value filtration = 0) {
+ Insertion_result result = Base::insert_simplex(simplex, filtration);
+ return (result.second);
+ }
+
+ // Do not interface this function, only used in strong witness interface for complex creation
+ bool insert_simplex_and_subfaces(const std::vector<std::size_t>& simplex, Filtration_value filtration = 0) {
+ Insertion_result result = Base::insert_simplex_and_subfaces(simplex, filtration);
+ return (result.second);
+ }
+
+ Filtration_value simplex_filtration(const Simplex& simplex) {
+ return Base::filtration(Base::find(simplex));
+ }
+
+ void remove_maximal_simplex(const Simplex& simplex) {
+ Base::remove_maximal_simplex(Base::find(simplex));
+ Base::initialize_filtration();
+ }
+
+ Filtered_simplices get_filtration() {
+ Base::initialize_filtration();
+ Filtered_simplices filtrations;
+ for (auto f_simplex : Base::filtration_simplex_range()) {
+ Simplex simplex;
+ for (auto vertex : Base::simplex_vertex_range(f_simplex)) {
+ simplex.insert(simplex.begin(), vertex);
+ }
+ filtrations.push_back(std::make_pair(simplex, Base::filtration(f_simplex)));
+ }
+ return filtrations;
+ }
+
+ Filtered_simplices get_skeleton(int dimension) {
+ Filtered_simplices skeletons;
+ for (auto f_simplex : Base::skeleton_simplex_range(dimension)) {
+ Simplex simplex;
+ for (auto vertex : Base::simplex_vertex_range(f_simplex)) {
+ simplex.insert(simplex.begin(), vertex);
+ }
+ skeletons.push_back(std::make_pair(simplex, Base::filtration(f_simplex)));
+ }
+ return skeletons;
+ }
+
+ Filtered_simplices get_star(const Simplex& simplex) {
+ Filtered_simplices star;
+ for (auto f_simplex : Base::star_simplex_range(Base::find(simplex))) {
+ Simplex simplex_star;
+ for (auto vertex : Base::simplex_vertex_range(f_simplex)) {
+ simplex_star.insert(simplex_star.begin(), vertex);
+ }
+ star.push_back(std::make_pair(simplex_star, Base::filtration(f_simplex)));
+ }
+ return star;
+ }
+
+ Filtered_simplices get_cofaces(const Simplex& simplex, int dimension) {
+ Filtered_simplices cofaces;
+ for (auto f_simplex : Base::cofaces_simplex_range(Base::find(simplex), dimension)) {
+ Simplex simplex_coface;
+ for (auto vertex : Base::simplex_vertex_range(f_simplex)) {
+ simplex_coface.insert(simplex_coface.begin(), vertex);
+ }
+ cofaces.push_back(std::make_pair(simplex_coface, Base::filtration(f_simplex)));
+ }
+ return cofaces;
+ }
+
+ void create_persistence(Gudhi::Persistent_cohomology_interface<Base>* pcoh) {
+ Base::initialize_filtration();
+ pcoh = new Gudhi::Persistent_cohomology_interface<Base>(*this);
+ }
+};
+
+} // namespace Gudhi
+
+#endif // INCLUDE_SIMPLEX_TREE_INTERFACE_H_