#ifndef TCG_POINT_H
#define TCG_POINT_H

//*************************************************************
//    tcg Generic Point Class
//*************************************************************

namespace tcg
{

/*!
  The Point class models a point in a bidimensional vector space. It has 2 members,
  x and y, representing its coordinates, and a constructor prototype:

    Point_class(const value_type& x, const value_type& y);
*/
template <typename T>
struct PointT {
	typedef T value_type;
	value_type x, y;

	PointT() : x(0), y(0) {}
	PointT(const value_type &x_, const value_type &y_) : x(x_), y(y_) {}

	bool operator==(const PointT &other) const { return (x == other.x) && (y == other.y); }
	bool operator!=(const PointT &other) const { return !operator==(other); }
};

//******************************************************************************
//    Common typedefs
//******************************************************************************

typedef PointT<int> Point;
typedef PointT<int> PointI;
typedef PointT<double> PointD;

//*************************************************************
//    tcg Generic Point Traits
//*************************************************************

template <typename P>
struct point_traits {
	typedef P point_type;
	typedef typename P::value_type value_type;
	typedef typename P::value_type float_type;

	inline static value_type x(const point_type &p) { return p.x; }
	inline static value_type y(const point_type &p) { return p.y; }
};

template <>
struct point_traits<PointI> {
	typedef PointI point_type;
	typedef PointI::value_type value_type;
	typedef double float_type;

	inline static value_type x(const point_type &p) { return p.x; }
	inline static value_type y(const point_type &p) { return p.y; }
};

} //namespace tcg

#endif //TCG_POINT_H