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#ifndef __SEXYVECTOR_H__
#define __SEXYVECTOR_H__

#include <math.h>

namespace Sexy
{

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
class SexyVector2
{
public:
	float x,y;

public:
	SexyVector2() : x(0), y(0) { }
	SexyVector2(float theX, float theY) : x(theX), y(theY) { }

	float Dot(const SexyVector2 &v) const { return x*v.x + y*v.y; }
	SexyVector2 operator+(const SexyVector2 &v) const { return SexyVector2(x+v.x, y+v.y); }
	SexyVector2 operator-(const SexyVector2 &v) const { return SexyVector2(x-v.x, y-v.y); }
	SexyVector2 operator-() const { return SexyVector2(-x, -y); }
	SexyVector2 operator*(float t) const { return SexyVector2(t*x, t*y); }
	SexyVector2 operator/(float t) const { return SexyVector2(x/t, y/t); }
	void operator+=(const SexyVector2 &v) { x+=v.x; y+=v.y; }
	void operator-=(const SexyVector2 &v) { x-=v.x; y-=v.y; }
	void operator*=(float t) { x*=t; y*=t; }
	void operator/=(float t) { x/=t; y/=t; }

	bool operator==(const SexyVector2 &v) { return x==v.x && y==v.y; }
	bool operator!=(const SexyVector2 &v) { return x!=v.x || y!=v.y; }

	float Magnitude() const { return sqrtf(x*x + y*y); }
	float MagnitudeSquared() const { return x*x+y*y; }

	SexyVector2 Normalize() const 
	{ 
		float aMag = Magnitude();
		return aMag!=0 ? (*this)/aMag : *this;
	}

	SexyVector2 Perp() const
	{
		return SexyVector2(-y, x);
	}

        float Angle(const SexyVector2 *v) const
        {
          if(v)
            {
		SexyVector2 s=*this, t=*v;

		s.Normalize(); 
                t.Normalize();
		return acosf(s.Dot(t));
            }
          else 
            return atan2f(y, x);
        }
};

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
class SexyVector3
{
public:
	float x,y,z;

public:
	SexyVector3() : x(0), y(0), z(0) { }
	SexyVector3(float theX, float theY, float theZ) : x(theX), y(theY), z(theZ) { }

	float Dot(const SexyVector3 &v) const { return x*v.x + y*v.y + z*v.z; }
	SexyVector3 Cross(const SexyVector3 &v) const { return SexyVector3(y*v.z - z*v.y, z*v.x - x*v.z, x*v.y - y*v.x); }
	SexyVector3 operator+(const SexyVector3 &v) const { return SexyVector3(x+v.x, y+v.y, z+v.z); }
	SexyVector3 operator-(const SexyVector3 &v) const { return SexyVector3(x-v.x, y-v.y, z-v.z); }
	SexyVector3 operator*(float t) const { return SexyVector3(t*x, t*y, t*z); }
	SexyVector3 operator/(float t) const { return SexyVector3(x/t, y/t, z/t); }
	float Magnitude() const { return sqrtf(x*x + y*y + z*z); }

	SexyVector3 Normalize() const 
	{ 
		float aMag = Magnitude();
		return aMag!=0 ? (*this)/aMag : *this;
	}
};

};

#endif