//********************************** Banshee Engine (www.banshee3d.com) **************************************************//
//**************** Copyright (c) 2016 Marko Pintera (marko.pintera@gmail.com). All rights reserved. **********************//
#pragma once

#include "Prerequisites/BsPrerequisitesUtil.h"
#include "Math/BsVector2.h"

namespace bs 
{
	/** @addtogroup Math
	 *  @{
	 */

    /** A line in 2D space represented with an origin and direction. */
    class BS_UTILITY_EXPORT Line2
    {
    public:
        Line2()
			:mOrigin(Vector2::ZERO), mDirection(Vector2::UNIT_X) 
		{ }

        Line2(const Vector2& origin, const Vector2& direction)
            :mOrigin(origin), mDirection(direction) 
		{ }

        void setOrigin(const Vector2& origin) { mOrigin = origin; } 
        const Vector2& getOrigin(void) const { return mOrigin; } 

        void setDirection(const Vector2& dir) { mDirection = dir; } 
        const Vector2& getDirection(void) const {return mDirection;} 

		/** Gets the position of a point t units along the line. */
		Vector2 getPoint(float t) const 
		{ 
			return Vector2(mOrigin + (mDirection * t));
		}
		
		/** Gets the position of a point t units along the line. */
		Vector2 operator*(float t) const 
		{ 
			return getPoint(t);
		}

		/** Line/Line intersection, returns boolean result and distance to intersection point. */
		std::pair<bool, float> intersects(const Line2& line) const;

	protected:
		Vector2 mOrigin;
		Vector2 mDirection;
    };

	/** @} */
}