#ifndef _POINT_HPP_
#define _POINT_HPP_


#define NAMESPACE_POINT op
#define NAMESPACE_POINT_BEGIN(x) namespace x {
#define NAMESPACE_POINT_END(x) };
#include <tuple>
NAMESPACE_POINT_BEGIN (NAMESPACE_POINT)

struct point
{
	point();
	point(double x_,double y_)
		:x(x_)
		,y(y_)
	{
	
	}

	static point min_(const point&a,const point&b);

	static point max_(const point&a,const point&b);

	void set(const point&p);
	void set(double,double);
	void swap(point&p);

	bool operator<(const point&p)const;

	static bool eq(double l,double r,double deta);

	bool empty()const;
	bool invalid()const;
	bool operator==(const point&r)const;

	double dist_direct(const point&o)const;

	double dist_direct(double x,double y)const;

	double dist(const point&o)const;
	double dist(double x,double y)const;
	double cos_k(const point&o)const;

	double sin_k(const point&o)const;

	point middle(const point&o)const;

	std::tuple<double,double,double> get_abc(const point&o)const;

public:
	double x,y;
};

NAMESPACE_POINT_END(NAMESPACE_POINT)
#endif