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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) 2020 Inria
*
* Modification(s):
* - YYYY/MM Author: Description of the modification
*/
#ifndef INCLUDE_ALPHA_COMPLEX_FACTORY_H_
#define INCLUDE_ALPHA_COMPLEX_FACTORY_H_
#include <gudhi/Simplex_tree.h>
#include <gudhi/Alpha_complex.h>
#include <gudhi/Alpha_complex_3d.h>
#include <gudhi/Alpha_complex_options.h>
#include <CGAL/Epeck_d.h>
#include <CGAL/Epick_d.h>
#include <boost/range/adaptor/transformed.hpp>
#include "Simplex_tree_interface.h"
#include <iostream>
#include <vector>
#include <string>
#include <memory> // for std::unique_ptr
namespace Gudhi {
namespace alpha_complex {
template <typename CgalPointType>
std::vector<double> pt_cgal_to_cython(CgalPointType const& point) {
std::vector<double> vd;
vd.reserve(point.dimension());
for (auto coord = point.cartesian_begin(); coord != point.cartesian_end(); coord++)
vd.push_back(CGAL::to_double(*coord));
return vd;
}
template <typename CgalPointType>
static CgalPointType pt_cython_to_cgal(std::vector<double> const& vec) {
return CgalPointType(vec.size(), vec.begin(), vec.end());
}
class Abstract_alpha_complex {
public:
virtual std::vector<double> get_point(int vh) = 0;
virtual bool create_simplex_tree(Simplex_tree_interface<>* simplex_tree, double max_alpha_square,
bool default_filtration_value) = 0;
virtual ~Abstract_alpha_complex() = default;
};
class Exact_alpha_complex_dD final : public Abstract_alpha_complex {
private:
using Kernel = CGAL::Epeck_d<CGAL::Dynamic_dimension_tag>;
using Point = typename Kernel::Point_d;
public:
Exact_alpha_complex_dD(const std::vector<std::vector<double>>& points, bool exact_version)
: exact_version_(exact_version),
alpha_complex_(boost::adaptors::transform(points, pt_cython_to_cgal<Point>)) {
}
virtual std::vector<double> get_point(int vh) override {
Point const& point = alpha_complex_.get_point(vh);
return pt_cgal_to_cython(point);
}
virtual bool create_simplex_tree(Simplex_tree_interface<>* simplex_tree, double max_alpha_square,
bool default_filtration_value) override {
return alpha_complex_.create_complex(*simplex_tree, max_alpha_square, exact_version_, default_filtration_value);
}
private:
bool exact_version_;
Alpha_complex<Kernel> alpha_complex_;
};
class Inexact_alpha_complex_dD final : public Abstract_alpha_complex {
private:
using Kernel = CGAL::Epick_d<CGAL::Dynamic_dimension_tag>;
using Point = typename Kernel::Point_d;
public:
Inexact_alpha_complex_dD(const std::vector<std::vector<double>>& points, bool exact_version)
: exact_version_(exact_version),
alpha_complex_(boost::adaptors::transform(points, pt_cython_to_cgal<Point>)) {
}
virtual std::vector<double> get_point(int vh) override {
Point const& point = alpha_complex_.get_point(vh);
return pt_cgal_to_cython(point);
}
virtual bool create_simplex_tree(Simplex_tree_interface<>* simplex_tree, double max_alpha_square,
bool default_filtration_value) override {
return alpha_complex_.create_complex(*simplex_tree, max_alpha_square, exact_version_, default_filtration_value);
}
private:
bool exact_version_;
Alpha_complex<Kernel> alpha_complex_;
};
class Exact_weighted_alpha_complex_dD final : public Abstract_alpha_complex {
private:
using Kernel = CGAL::Epeck_d<CGAL::Dynamic_dimension_tag>;
using Point = typename Kernel::Point_d;
public:
Exact_weighted_alpha_complex_dD(const std::vector<std::vector<double>>& points,
const std::vector<double>& weights, bool exact_version)
: exact_version_(exact_version),
alpha_complex_(boost::adaptors::transform(points, pt_cython_to_cgal<Point>), weights) {
}
virtual std::vector<double> get_point(int vh) override {
Point const& point = alpha_complex_.get_point(vh).point();
return pt_cgal_to_cython(point);
}
virtual bool create_simplex_tree(Simplex_tree_interface<>* simplex_tree, double max_alpha_square,
bool default_filtration_value) override {
return alpha_complex_.create_complex(*simplex_tree, max_alpha_square, exact_version_, default_filtration_value);
}
private:
bool exact_version_;
Alpha_complex<Kernel, true> alpha_complex_;
};
class Inexact_weighted_alpha_complex_dD final : public Abstract_alpha_complex {
private:
using Kernel = CGAL::Epick_d<CGAL::Dynamic_dimension_tag>;
using Point = typename Kernel::Point_d;
public:
Inexact_weighted_alpha_complex_dD(const std::vector<std::vector<double>>& points,
const std::vector<double>& weights, bool exact_version)
: exact_version_(exact_version),
alpha_complex_(boost::adaptors::transform(points, pt_cython_to_cgal<Point>), weights) {
}
virtual std::vector<double> get_point(int vh) override {
Point const& point = alpha_complex_.get_point(vh).point();
return pt_cgal_to_cython(point);
}
virtual bool create_simplex_tree(Simplex_tree_interface<>* simplex_tree, double max_alpha_square,
bool default_filtration_value) override {
return alpha_complex_.create_complex(*simplex_tree, max_alpha_square, exact_version_, default_filtration_value);
}
private:
bool exact_version_;
Alpha_complex<Kernel, true> alpha_complex_;
};
template <complexity Complexity>
class Alpha_complex_3D final : public Abstract_alpha_complex {
private:
using Point = typename Alpha_complex_3d<Complexity, false, false>::Bare_point_3;
static Point pt_cython_to_cgal_3(std::vector<double> const& vec) {
return Point(vec[0], vec[1], vec[2]);
}
public:
Alpha_complex_3D(const std::vector<std::vector<double>>& points)
: alpha_complex_(boost::adaptors::transform(points, pt_cython_to_cgal_3)) {
}
virtual std::vector<double> get_point(int vh) override {
Point const& point = alpha_complex_.get_point(vh);
return pt_cgal_to_cython(point);
}
virtual bool create_simplex_tree(Simplex_tree_interface<>* simplex_tree, double max_alpha_square,
bool default_filtration_value) override {
return alpha_complex_.create_complex(*simplex_tree, max_alpha_square);
}
private:
Alpha_complex_3d<Complexity, false, false> alpha_complex_;
};
} // namespace alpha_complex
} // namespace Gudhi
#endif // INCLUDE_ALPHA_COMPLEX_FACTORY_H_
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