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diff --git a/src/Bottleneck/include/gudhi/Persistence_diagrams_graph.h b/src/Bottleneck/include/gudhi/Persistence_diagrams_graph.h
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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): Francois Godi
- *
- * Copyright (C) 2015 INRIA Saclay (France)
- *
- * 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 SRC_BOTTLENECK_INCLUDE_GUDHI_PERSISTENCE_DIAGRAMS_GRAPH_H_
-#define SRC_BOTTLENECK_INCLUDE_GUDHI_PERSISTENCE_DIAGRAMS_GRAPH_H_
-
-#include <vector>
-#include <set>
-#include <cmath>
-#include <utility> // for pair<>
-#include <algorithm> // for max
-
-namespace Gudhi {
-
-namespace bottleneck {
-
-// Diagram_point is the type of the persistence diagram's points
-typedef std::pair<double, double> Diagram_point;
-
-// Return the used index for encoding none of the points
-int null_point_index();
-
-// Persistence_diagrams_graph is the interface beetwen any external representation of the two persistence diagrams and
-// the bottleneck distance computation. An interface is necessary to ensure basic functions complexity.
-
-class Persistence_diagrams_graph {
- public:
- // Persistence_diagram1 and 2 are the types of any externals representations of persistence diagrams.
- // They have to have an iterator over points, which have to have fields first (for birth) and second (for death).
- template<typename Persistence_diagram1, typename Persistence_diagram2>
- Persistence_diagrams_graph(Persistence_diagram1& diag1, Persistence_diagram2& diag2, double e = 0.);
- Persistence_diagrams_graph();
- bool on_the_u_diagonal(int u_point_index) const;
- bool on_the_v_diagonal(int v_point_index) const;
- int corresponding_point_in_u(int v_point_index) const;
- int corresponding_point_in_v(int u_point_index) const;
- double distance(int u_point_index, int v_point_index) const;
- int size() const;
- std::vector<double>* sorted_distances();
-
- private:
- std::vector<Diagram_point> u;
- std::vector<Diagram_point> v;
- Diagram_point get_u_point(int u_point_index) const;
- Diagram_point get_v_point(int v_point_index) const;
-};
-
-inline int null_point_index() {
- return -1;
-}
-
-template<typename Persistence_diagram1, typename Persistence_diagram2>
-Persistence_diagrams_graph::Persistence_diagrams_graph(Persistence_diagram1& diag1, Persistence_diagram2& diag2, double e)
- : u(), v() {
- for (auto it = diag1.cbegin(); it != diag1.cend(); ++it)
- if (it->second - it->first > e)
- u.emplace_back(*it);
- for (auto it = diag2.cbegin(); it != diag2.cend(); ++it)
- if (it->second - it->first > e)
- v.emplace_back(*it);
- if (u.size() < v.size())
- swap(u, v);
-}
-
-Persistence_diagrams_graph::Persistence_diagrams_graph()
- : u(), v() { }
-
-inline bool Persistence_diagrams_graph::on_the_u_diagonal(int u_point_index) const {
- return u_point_index >= static_cast<int> (u.size());
-}
-
-inline bool Persistence_diagrams_graph::on_the_v_diagonal(int v_point_index) const {
- return v_point_index >= static_cast<int> (v.size());
-}
-
-inline int Persistence_diagrams_graph::corresponding_point_in_u(int v_point_index) const {
- return on_the_v_diagonal(v_point_index) ?
- v_point_index - static_cast<int> (v.size()) : v_point_index + static_cast<int> (u.size());
-}
-
-inline int Persistence_diagrams_graph::corresponding_point_in_v(int u_point_index) const {
- return on_the_u_diagonal(u_point_index) ?
- u_point_index - static_cast<int> (u.size()) : u_point_index + static_cast<int> (v.size());
-}
-
-inline double Persistence_diagrams_graph::distance(int u_point_index, int v_point_index) const {
- // could be optimized for the case where one point is the projection of the other
- if (on_the_u_diagonal(u_point_index) && on_the_v_diagonal(v_point_index))
- return 0;
- Diagram_point p_u = get_u_point(u_point_index);
- Diagram_point p_v = get_v_point(v_point_index);
- return (std::max)(std::fabs(p_u.first - p_v.first), std::fabs(p_u.second - p_v.second));
-}
-
-inline int Persistence_diagrams_graph::size() const {
- return static_cast<int> (u.size() + v.size());
-}
-
-inline std::vector<double>* Persistence_diagrams_graph::sorted_distances() {
- // could be optimized
- std::set<double> sorted_distances;
- for (int u_point_index = 0; u_point_index < size(); ++u_point_index)
- for (int v_point_index = 0; v_point_index < size(); ++v_point_index)
- sorted_distances.emplace(distance(u_point_index, v_point_index));
- return new std::vector<double>(sorted_distances.cbegin(), sorted_distances.cend());
-}
-
-inline Diagram_point Persistence_diagrams_graph::get_u_point(int u_point_index) const {
- if (!on_the_u_diagonal(u_point_index))
- return u.at(u_point_index);
- Diagram_point projector = v.at(corresponding_point_in_v(u_point_index));
- double x = (projector.first + projector.second) / 2;
- return Diagram_point(x, x);
-}
-
-inline Diagram_point Persistence_diagrams_graph::get_v_point(int v_point_index) const {
- if (!on_the_v_diagonal(v_point_index))
- return v.at(v_point_index);
- Diagram_point projector = u.at(corresponding_point_in_u(v_point_index));
- double x = (projector.first + projector.second) / 2;
- return Diagram_point(x, x);
-}
-
-} // namespace bottleneck
-
-} // namespace Gudhi
-
-#endif // SRC_BOTTLENECK_INCLUDE_GUDHI_PERSISTENCE_DIAGRAMS_GRAPH_H_