lily/include/offset.hh

   1 /*
   2   offset.hh -- part of GNU LilyPond
   3
   4   (c) 1996,97 Han-Wen Nienhuys
   5 */
   6
   7 #ifndef OFFSET_HH
   8 #define OFFSET_HH
   9
  10 #include "real.hh"
  11 #include "axes.hh"
  12
  13
  14 /// 2d vector
  15 struct Offset {
  16   Real coordinate_a_[NO_AXES];
  17
  18   Real &y() { return coordinate_a_[Y_AXIS]; }
  19   Real &x() { return coordinate_a_[X_AXIS]; }
  20   Real y() const { return coordinate_a_[Y_AXIS]; }
  21   Real x() const { return coordinate_a_[X_AXIS]; }
  22
  23   Real &operator[](Axis i) {
  24     return coordinate_a_[i];
  25   }
  26   Real operator[](Axis i) const{
  27     return coordinate_a_[i];
  28   }
  29   String str () const;
  30
  31   Offset operator+=(Offset o) {
  32     x()+=o.x ();
  33     y()+=o.y ();
  34     return *this;
  35   }
  36   Offset (Real ix , Real iy) {
  37     x()=ix;
  38     y()=iy;
  39   }
  40   Offset() {
  41     x()=0.0;
  42     y()=0.0;
  43   }
  44 };
  45
  46 inline Offset
  47 operator+ (Offset o1, Offset const& o2)
  48 {
  49   o1 += o2;
  50   return o1;
  51 }
  52
  53 #endif // OFFSET_HH
  54
  55