/**********************************************************************

 *<

	FILE: point2.h



	DESCRIPTION: Class definition for Point2



	CREATED BY: Dan Silva



	HISTORY:



 *>	Copyright (c) 1994, All Rights Reserved.

 **********************************************************************/



#ifndef __POINT2__ 



#define __POINT2__



class ostream;



class Point2 {

public:

	float x,y;



	// Constructors

	Point2(){}

	Point2(float X, float Y)  { x = X; y = Y;  }

	Point2(double X, double Y)  { x = (float)X; y = (float)Y;  }

	Point2(const Point2& a) { x = a.x; y = a.y; } 

	Point2(float af[2]) { x = af[0]; y = af[1]; }



	// Access operators

	float& operator[](int i) { return (&x)[i]; }     

	const float& operator[](int i) const { return (&x)[i]; }  

	

	// Conversion function

	operator float*() { return(&x); }



	// Unary operators

	Point2 operator-() const { return(Point2(-x,-y)); } 

	Point2 operator+() const { return *this; } 



	// Assignment operators

	DllExport Point2& operator-=(const Point2&);

	DllExport Point2& operator+=(const Point2&);

	DllExport Point2& operator*=(float);

	DllExport Point2& operator/=(float);



	// Binary operators

	DllExport Point2 operator-(const Point2&) const;

	DllExport Point2 operator+(const Point2&) const;

	DllExport float DotProd(const Point2&) const;		// DOT PRODUCT

	DllExport float operator*(const Point2&) const;	// DOT PRODUCT



	// Relational operators

	int operator==(const Point2& p) const { return (x == p.x && y == p.y); }

	};





float DllExport Length(const Point2&); 

int DllExport MaxComponent(const Point2&);  // the component with the maximum abs value

int DllExport MinComponent(const Point2&);  // the component with the minimum abs value

Point2 DllExport Normalize(const Point2&); // Return a unit vector.

	 

Point2 DllExport operator*(float, const Point2&);	// multiply by scalar

Point2 DllExport operator*(const Point2&, float);	// multiply by scalar

Point2 DllExport operator/(const Point2&, float);	// divide by scalar



ostream DllExport &operator<<(ostream&, const Point2&);

	 

// Inlines:



inline float Length(const Point2& v) {	

	return (float)sqrt(v.x*v.x+v.y*v.y);

	}



inline Point2& Point2::operator-=(const Point2& a) {	

	x -= a.x;	y -= a.y;  

	return *this;

	}



inline Point2& Point2::operator+=(const Point2& a) {

	x += a.x;	y += a.y;  

	return *this;

	}



inline Point2& Point2::operator*=(float f) {

	x *= f;   y *= f;	

	return *this;

	}



inline Point2& Point2::operator/=(float f) { 

	x /= f;	y /= f;		

	return *this; 

	}



inline Point2 Point2::operator-(const Point2& b) const{

	return(Point2(x-b.x,y-b.y));

	}



inline Point2 Point2::operator+(const Point2& b) const {

	return(Point2(x+b.x,y+b.y));

	}



inline float Point2::DotProd(const Point2& b) const{

	return(x*b.x+y*b.y);

	}



inline float Point2::operator*(const Point2& b)const {

	return(x*b.x+y*b.y);

	}



inline Point2 operator*(float f, const Point2& a) {

	return(Point2(a.x*f, a.y*f));

	}



inline Point2 operator*(const Point2& a, float f) {

	return(Point2(a.x*f, a.y*f));

	}



inline Point2 operator/(const Point2& a, float f) {

	return(Point2(a.x/f, a.y/f));

	}



#endif