lily/box.cc

   1 /*
   2   box.cc -- implement Box
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "box.hh"
  10 #include "array.hh"
  11 #include "axes.hh"
  12
  13 void
  14 Box::translate (Offset o)
  15 {
  16   for (Axis i=X_AXIS; i < NO_AXES; incr (i))
  17     interval_a_[i] += o[i];
  18 }
  19
  20 void
  21 Box::unite (Box b)
  22 {
  23   for (Axis i=X_AXIS; i < NO_AXES; incr (i))
  24     interval_a_[i].unite (b[i]);
  25 }
  26
  27 /**
  28   Initialize to empty.
  29  */
  30 Box::Box ()
  31 {
  32 }
  33
  34 void
  35 Box::set_empty ()
  36 {
  37   interval_a_[X_AXIS].set_empty ();
  38   interval_a_[Y_AXIS].set_empty ();
  39 }
  40
  41 Box::Box (Interval ix, Interval iy)
  42 {
  43   x () = ix;
  44   y () = iy;
  45 }
  46
  47 Interval &
  48 Box::operator[] (Axis a)
  49 {
  50   return interval_a_[a];
  51 }
  52
  53 Interval
  54 Box::operator[] (Axis a)const
  55 {
  56   return interval_a_[a];
  57 }
  58
  59 void
  60 Box::scale (Real s)
  61 {
  62   interval_a_[X_AXIS] *= s;
  63   interval_a_[Y_AXIS] *= s;
  64 }
  65
  66 void
  67 Box::add_point (Offset o)
  68 {
  69   interval_a_[X_AXIS].add_point (o[X_AXIS]);
  70   interval_a_[Y_AXIS].add_point (o[Y_AXIS]);
  71 }
  72
  73 Offset
  74 Box::center () const
  75 {
  76   return Offset (interval_a_[X_AXIS].center (),
  77                  interval_a_[Y_AXIS].center ());
  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 }