lily/box.cc

   1 /*
   2   box.cc -- implement Box
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "box.hh"
  10 #include "array.hh"
  11
  12 void
  13 Box::translate (Offset o)
  14 {
  15   for (Axis i = X_AXIS; i < NO_AXES; incr (i))
  16     interval_a_[i] += o[i];
  17 }
  18
  19 void
  20 Box::unite (Box b)
  21 {
  22   for (Axis i = X_AXIS; i < NO_AXES; incr (i))
  23     interval_a_[i].unite (b[i]);
  24 }
  25
  26 /**
  27    Initialize to empty.
  28 */
  29 Box::Box ()
  30 {
  31 }
  32
  33 void
  34 Box::set_empty ()
  35 {
  36   interval_a_[X_AXIS].set_empty ();
  37   interval_a_[Y_AXIS].set_empty ();
  38 }
  39
  40 Box::Box (Interval ix, Interval iy)
  41 {
  42   x () = ix;
  43   y () = iy;
  44 }
  45
  46 Interval &
  47 Box::operator [] (Axis a)
  48 {
  49   return interval_a_[a];
  50 }
  51
  52 Interval
  53 Box::operator [] (Axis a) const
  54 {
  55   return interval_a_[a];
  56 }
  57
  58 void
  59 Box::scale (Real s)
  60 {
  61   interval_a_[X_AXIS] *= s;
  62   interval_a_[Y_AXIS] *= s;
  63 }
  64
  65 void
  66 Box::add_point (Offset o)
  67 {
  68   interval_a_[X_AXIS].add_point (o[X_AXIS]);
  69   interval_a_[Y_AXIS].add_point (o[Y_AXIS]);
  70 }
  71
  72 Offset
  73 Box::center () const
  74 {
  75   return Offset (interval_a_[X_AXIS].center (),
  76                  interval_a_[Y_AXIS].center ());
  77 }
  78
  79 void
  80 Box::widen (Real x, Real y)
  81 {
  82   interval_a_[X_AXIS].widen (x);
  83   interval_a_[Y_AXIS].widen (y);
  84 }