geom.h.old

Design Pattern C Source Code

#include "defs.H"
typedef float Coord;

#include "stdlib.h"
class ostream;
class istream;
class Point {
public:
    static const Point& Zero;	
    Point(Coord x = 0.0, Coord y = 0.0);

    Coord X() const;
    Coord Y() const;
    void X(Coord x);
    void Y(Coord y);
    
    friend Point operator+(const Point &p1, const Point &p2);
    friend Point operator-(const Point &p1, const Point &p2);
    friend Point operator*(const Point &p1, const Point &p2);
    friend Point operator/(const Point &p1, const Point &p2);
    
    Point operator-();
    Point operator+=(const Point &p);
    Point operator-=(const Point &p);
    Point operator*=(const Point &p);
    Point operator/=(const Point &p);
    
    friend bool operator==(const Point &p1, const Point &p2);
    friend bool operator!=(const Point &p1, const Point &p2);

    friend ostream& operator<<(ostream&, const Point&);
    friend istream& operator>>(istream&, Point&);
public:
    Coord _x;
    Coord _y;
};

class Rect {
public:
    static const Rect& Zero;	
    Rect(Coord x, Coord y, Coord w, Coord h);
    Rect(const Point &origin, const Point &extent);         
    
    Coord Width() const; Coord Height() const; 
    Coord Left() const; Coord Top() const;
    void Width(Coord); void Height(Coord); 
    void Left(Coord); void Top(Coord);
    
    Point Origin() const; Point Extent() const;
    void Origin(const Point&); void Extent(const Point&);
    
    Rect &Moveby(const Point &p);
    bool IsEmpty() const;
    bool ContainsPoint(const Point &p) const;
public:
    Point _origin;
    Point _extent;
};

// some useful functions
Coord min(Coord, Coord);
Coord max(Coord, Coord);
Coord abs(Coord);
int round(Coord);