#ifndef slic3r_FillHoneycomb_hpp_
#define slic3r_FillHoneycomb_hpp_

#include <map>

#include "../libslic3r.h"

#include "FillBase.hpp"

namespace Slic3r {

class FillHoneycomb : public FillWithDirection
{
public:
    virtual ~FillHoneycomb() {}
    virtual Polylines fill_surface(const Surface *surface, const FillParams &params);

protected:
	// Caching the 
	struct CacheID 
	{
		CacheID(float adensity, coordf_t aspacing) : 
			density(adensity), spacing(aspacing) {}
		float		density;
		coordf_t	spacing;
		bool operator<(const CacheID &other) const 
			{ return (density < other.density) || (density == other.density && spacing < other.spacing); }
		bool operator==(const CacheID &other) const 
			{ return density == other.density && spacing == other.spacing; }
	};
	struct CacheData
	{
		coord_t	distance;
        coord_t hex_side;
        coord_t hex_width;
        coord_t	pattern_height;
        coord_t y_short;
        coord_t x_offset;
        coord_t	y_offset;
        Point	hex_center;
    };
    typedef std::map<CacheID, CacheData> Cache;
	Cache cache;

    virtual float _layer_angle(size_t idx) const { return 0.5f * float(M_PI) * (idx % 3); }
};

} // namespace Slic3r

#endif // slic3r_FillHoneycomb_hpp_