lily/bow.cc

   1 /*
   2   bow.cc -- implement Bow
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "bow.hh"
  10 #include "paper-def.hh"
  11 #include "molecule.hh"
  12 #include "lookup.hh"
  13
  14 IMPLEMENT_IS_TYPE_B1(Bow,Directional_spanner);
  15
  16 Bow::Bow ()
  17 {
  18   dy_f_drul_[LEFT] = dy_f_drul_[RIGHT] = 0;
  19   dx_f_drul_[LEFT] = dx_f_drul_[RIGHT] = 0.0;
  20 }
  21
  22
  23 Offset
  24 Bow::center () const
  25 {
  26   Real dy =  dy_f_drul_[RIGHT]-dy_f_drul_[LEFT];
  27
  28   Real w = width ().length ();
  29
  30   return Offset (w/2,dy );
  31 }
  32
  33 Real
  34 Bow::height_f () const
  35 {
  36   return 0;
  37 }
  38
  39 Molecule*
  40 Bow::brew_molecule_p () const
  41 {
  42   Molecule*output = new Molecule;
  43   Real w = width ().length ();
  44
  45   Real dy_f = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
  46
  47   Real nw_f = paper ()->note_width ();
  48
  49   w+= (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT]);
  50   Real round_w = w;             // slur lookup rounds the slurwidth .
  51
  52   Atom a = paper ()->lookup_l ()->slur (dy_f, round_w, height_f (), dir_);
  53
  54   Real error = w-round_w;
  55   a.translate (Offset ( (dx_f_drul_[LEFT] + 0.5*nw_f)
  56                        + error/2,
  57                        dy_f_drul_[LEFT]));
  58   output->add (a);
  59   return output;
  60 }
  61