include/lib/base/epoint.h

   1 #ifndef EPOINT_H
   2 #define EPOINT_H
   3
   4 #include <iostream>
   5
   6 #ifndef ABS
   7 #define ABS(x) ( x>0 ? x : -x )
   8 #endif
   9
  10 class ePoint
  11 {
  12 public:
  13         ePoint();
  14         ePoint( int xpos, int ypos );
  15
  16         bool   isNull() const;
  17
  18         int        x()          const;
  19         int        y()          const;
  20         void   setX( int x );
  21         void   setY( int y );
  22
  23         int manhattanLength() const;
  24
  25         int &rx();
  26         int &ry();
  27
  28         ePoint &operator+=( const ePoint &p );
  29         ePoint &operator-=( const ePoint &p );
  30         ePoint &operator*=( int c );
  31         ePoint &operator*=( double c );
  32         ePoint &operator/=( int c );
  33         ePoint &operator/=( double c );
  34
  35         friend inline bool       operator==( const ePoint &, const ePoint & );
  36         friend inline bool       operator!=( const ePoint &, const ePoint & );
  37         friend inline ePoint operator+( const ePoint &, const ePoint & );
  38         friend inline ePoint operator-( const ePoint &, const ePoint & );
  39         friend inline ePoint operator*( const ePoint &, int );
  40         friend inline ePoint operator*( int, const ePoint & );
  41         friend inline ePoint operator*( const ePoint &, double );
  42         friend inline ePoint operator*( double, const ePoint & );
  43         friend inline ePoint operator-( const ePoint & );
  44         friend inline ePoint operator/( const ePoint &, int );
  45         friend inline ePoint operator/( const ePoint &, double );
  46 private:
  47         int xp;
  48         int yp;
  49 };
  50
  51
  52 inline int ePoint::manhattanLength() const
  53 {
  54         return ABS(x())+ABS(y());
  55 }
  56
  57
  58 /*****************************************************************************
  59   ePoint stream functions
  60  *****************************************************************************/
  61 namespace std
  62 {
  63         inline ostream &operator<<( ostream & s, const ePoint & p )
  64         {
  65                 s << p.x() << p.y();
  66                 return s;
  67         }
  68
  69         inline istream &operator>>( istream & s, ePoint & p )
  70         {
  71                 s >> p.rx() >> p.ry();
  72           return s;
  73         }
  74 }
  75
  76
  77 /*****************************************************************************
  78   ePoint inline functions
  79  *****************************************************************************/
  80
  81 inline ePoint::ePoint()
  82 { xp=0; yp=0; }
  83
  84 inline ePoint::ePoint( int xpos, int ypos )
  85 { xp=(int)xpos; yp=(int)ypos; }
  86
  87 inline bool ePoint::isNull() const
  88 { return xp == 0 && yp == 0; }
  89
  90 inline int ePoint::x() const
  91 { return xp; }
  92
  93 inline int ePoint::y() const
  94 { return yp; }
  95
  96 inline void ePoint::setX( int x )
  97 { xp = (int)x; }
  98
  99 inline void ePoint::setY( int y )
 100 { yp = (int)y; }
 101
 102 inline int &ePoint::rx()
 103 { return xp; }
 104
 105 inline int &ePoint::ry()
 106 { return yp; }
 107
 108 inline ePoint &ePoint::operator+=( const ePoint &p )
 109 { xp+=p.xp; yp+=p.yp; return *this; }
 110
 111 inline ePoint &ePoint::operator-=( const ePoint &p )
 112 { xp-=p.xp; yp-=p.yp; return *this; }
 113
 114 inline ePoint &ePoint::operator*=( int c )
 115 { xp*=(int)c; yp*=(int)c; return *this; }
 116
 117 inline ePoint &ePoint::operator*=( double c )
 118 { xp=(int)(xp*c); yp=(int)(yp*c); return *this; }
 119
 120 inline bool operator==( const ePoint &p1, const ePoint &p2 )
 121 { return p1.xp == p2.xp && p1.yp == p2.yp; }
 122
 123 inline bool operator!=( const ePoint &p1, const ePoint &p2 )
 124 { return p1.xp != p2.xp || p1.yp != p2.yp; }
 125
 126 inline ePoint operator+( const ePoint &p1, const ePoint &p2 )
 127 { return ePoint(p1.xp+p2.xp, p1.yp+p2.yp); }
 128
 129 inline ePoint operator-( const ePoint &p1, const ePoint &p2 )
 130 { return ePoint(p1.xp-p2.xp, p1.yp-p2.yp); }
 131
 132 inline ePoint operator*( const ePoint &p, int c )
 133 { return ePoint(p.xp*c, p.yp*c); }
 134
 135 inline ePoint operator*( int c, const ePoint &p )
 136 { return ePoint(p.xp*c, p.yp*c); }
 137
 138 inline ePoint operator*( const ePoint &p, double c )
 139 { return ePoint((int)(p.xp*c), (int)(p.yp*c)); }
 140
 141 inline ePoint operator*( double c, const ePoint &p )
 142 { return ePoint((int)(p.xp*c), (int)(p.yp*c)); }
 143
 144 inline ePoint operator-( const ePoint &p )
 145 { return ePoint(-p.xp, -p.yp); }
 146
 147 inline ePoint &ePoint::operator/=( int c )
 148 {
 149         xp/=(int)c;
 150         yp/=(int)c;
 151         return *this;
 152 }
 153
 154 inline ePoint &ePoint::operator/=( double c )
 155 {
 156         xp=(int)(xp/c);
 157         yp=(int)(yp/c);
 158         return *this;
 159 }
 160
 161 inline ePoint operator/( const ePoint &p, int c )
 162 {
 163         return ePoint(p.xp/c, p.yp/c);
 164 }
 165
 166 inline ePoint operator/( const ePoint &p, double c )
 167 {
 168         return ePoint((int)(p.xp/c), (int)(p.yp/c));
 169 }
 170
 171
 172 #endif // EPOINT_H