/*
   math/vector2f.h
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#ifndef __INCLUDED_MATH_VECTOR2F_H__
#define __INCLUDED_MATH_VECTOR2F_H__

#include <iostream>

namespace math {

/// a point or vector in 2D space
class Vector2f {

public:
	/// default constructor
	Vector2f();
	/// assignment constructor
	Vector2f(float const x, float const y);
	/// copy constructor
	Vector2f(Vector2f const &other);

	/// assign (0,0)
	void clear();

	/// assignment operator
	void assign(float const x, float const y);
	/// assignment operator
	void assign(Vector2f const &other);

	/// assignment operator
	Vector2f & operator=(Vector2f const &other);

	/// vector subtraction
	Vector2f & operator-=(Vector2f const &other);

	/// vector sum
	Vector2f & operator+=(Vector2f const &other);

	/// vector subtraction
	Vector2f operator-(Vector2f const &other) const;

	/// vector sum
	Vector2f operator+(Vector2f const &other) const;


	/// array operator
	inline float& operator[](const size_t index) {
		return coord[index];
	}

	/// array operator
	inline float operator[](const size_t index) const {
		return coord[index];
	}

	/// a pointer to the internal data
	inline float *ptr() const { return (float *) coord; }

	/// x coordinate
	float &x;

	/// y coordinate
	float &y;

private:
	float coord[2];
};

}
#endif // __INCLUDED_MATH_VECTOR2F_H__