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#ifndef slic3r_ShortestPath_hpp_
#define slic3r_ShortestPath_hpp_
#include "libslic3r.h"
#include "ExtrusionEntity.hpp"
#include "Point.hpp"
#include <utility>
#include <vector>
namespace ClipperLib { class PolyNode; }
namespace Slic3r {
std::vector<size_t> chain_points(const Points &points, Point *start_near = nullptr);
std::vector<std::pair<size_t, bool>> chain_extrusion_entities(std::vector<ExtrusionEntity*> &entities, const Point *start_near = nullptr);
void reorder_extrusion_entities(std::vector<ExtrusionEntity*> &entities, const std::vector<std::pair<size_t, bool>> &chain);
void chain_and_reorder_extrusion_entities(std::vector<ExtrusionEntity*> &entities, const Point *start_near = nullptr);
std::vector<std::pair<size_t, bool>> chain_extrusion_paths(std::vector<ExtrusionPath> &extrusion_paths, const Point *start_near = nullptr);
void reorder_extrusion_paths(std::vector<ExtrusionPath> &extrusion_paths, std::vector<std::pair<size_t, bool>> &chain);
void chain_and_reorder_extrusion_paths(std::vector<ExtrusionPath> &extrusion_paths, const Point *start_near = nullptr);
Polylines chain_polylines(Polylines &&src, const Point *start_near = nullptr);
inline Polylines chain_polylines(const Polylines& src, const Point* start_near = nullptr) { Polylines tmp(src); return chain_polylines(std::move(tmp), start_near); }
std::vector<ClipperLib::PolyNode*> chain_clipper_polynodes(const Points &points, const std::vector<ClipperLib::PolyNode*> &items);
// Chain instances of print objects by an approximate shortest path.
// Returns pairs of PrintObject idx and instance of that PrintObject.
class Print;
struct PrintInstance;
std::vector<const PrintInstance*> chain_print_object_instances(const Print &print);
// Chain lines into polylines.
Polylines chain_lines(const std::vector<Line> &lines, const double point_distance_epsilon);
} // namespace Slic3r
#endif /* slic3r_ShortestPath_hpp_ */
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