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 Bow::Bow()
  15 {
  16   pos_i_drul_[LEFT] = pos_i_drul_[RIGHT] = 0;
  17   dx_f_drul_[LEFT] = dx_f_drul_[RIGHT] = 0.0;
  18 }
  19
  20
  21 Offset
  22 Bow::center() const
  23 {
  24   int dy =  pos_i_drul_[RIGHT]-pos_i_drul_[LEFT];
  25
  26   Real w = width().length ();
  27
  28   return Offset (w/2,dy * paper()->internote_f ());
  29 }
  30
  31
  32 Molecule*
  33 Bow::brew_molecule_p() const
  34 {
  35   Molecule*output = new Molecule;
  36   Real w = width().length ();
  37
  38   int dy = pos_i_drul_[RIGHT] - pos_i_drul_[LEFT];
  39
  40   Real nw_f = paper()->note_width ();
  41   Real nh_f = paper()->internote_f ();
  42
  43
  44   w+= (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT]) * nw_f ;
  45   Real round_w = w;             // slur lookup rounds the slurwidth .
  46
  47   Atom a = paper()->lookup_l ()->slur (dy , round_w, dir_);
  48
  49   Real error = w-round_w;
  50     a.translate (Offset ((dx_f_drul_[LEFT] + 0.5)*nw_f + error/2,
  51                        pos_i_drul_[LEFT] * nh_f));
  52   output->add (a);
  53   return output;
  54 }
  55
  56
  57 IMPLEMENT_IS_TYPE_B1(Bow,Directional_spanner);