lily/bow.cc

   1 /*
   2   bow.cc -- implement Bow
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7       Jan Nieuwenhuizen <janneke@gnu.org>
   8 */
   9
  10 #include "bow.hh"
  11 #include "debug.hh"
  12 #include "paper-def.hh"
  13 #include "molecule.hh"
  14 #include "lookup.hh"
  15 #include "bezier.hh"
  16 #include "main.hh"
  17
  18
  19
  20 Bow::Bow ()
  21 {
  22   dy_f_drul_[LEFT] = dy_f_drul_[RIGHT] = 0.0;
  23   dx_f_drul_[LEFT] = dx_f_drul_[RIGHT] = 0.0;
  24   dash_i_ = 0;
  25 }
  26
  27 Molecule*
  28 Bow::brew_molecule_p () const
  29 {
  30   Real thick = paper ()->get_var ("slur_thickness");
  31   Array<Offset> c = get_controls ();
  32   Real dy = c[3].y () - c[0].y ();
  33   Atom a;
  34
  35   if (!dash_i_)
  36     a = lookup_l ()->slur (c);
  37   else
  38     a = lookup_l ()->dashed_slur (c, thick, dash_i_);
  39
  40   if (check_debug && !monitor->silent_b ("Bow"))
  41     {
  42       static int i = 1;
  43       cout << "******" << i++ << "******" << endl;
  44       // gcc 2.7.2: ices
  45 //      cout << "c0.y: " << c[0].y << endl;
  46       cout << "c0.y: " << c[0].y () << endl;
  47       cout << "c3.y: " << c[3].y () << endl;
  48       cout << "dy: " << dy << endl;
  49       cout << "dy_f_l: " << dy_f_drul_[LEFT] << endl;
  50       cout << "dy_f_r: " << dy_f_drul_[RIGHT] << endl;
  51       cout << "dy_f: " << dy_f_drul_[RIGHT] - dy_f_drul_[LEFT] << endl;
  52     }
  53   a.translate (Offset (dx_f_drul_[LEFT], dy_f_drul_[LEFT]));
  54
  55   Molecule* mol_p = new Molecule;
  56   mol_p->add_atom (a);
  57
  58   return mol_p;
  59 }
  60
  61 Offset
  62 Bow::center () const
  63 {
  64   Real dy = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
  65
  66   Real dx = width ().length ();
  67
  68   return Offset (dx / 2, dy);
  69 }
  70
  71
  72
  73 /*
  74
  75    ugh .  Control points are too crude measures.
  76  */
  77 Interval
  78 Bow::do_height () const
  79 {
  80   Interval iv;
  81   Array<Offset> c (get_controls());
  82   for (int i=0; i < c.size (); i++)
  83     {
  84       Real y = c[i][Y_AXIS];
  85       iv.unite (Interval (y,y));
  86     }
  87   return iv;
  88 }
  89
  90 Interval
  91 Bow::do_width () const
  92 {
  93   Interval i = Spanner::do_width ();
  94   Real dx = i.length();
  95   return Interval (0, dx);
  96 }
  97
  98 Array<Offset>
  99 Bow::get_controls () const
 100 {
 101   Bezier_bow b (paper ());
 102   b.set (get_encompass_offset_arr (), dir_);
 103   b.calc ();
 104   Array<Offset> controls;
 105   controls.set_size (8);
 106   for (int i = 0; i < 4; i++)
 107     controls[i] = b.control_[i];
 108   for (int i = 0; i < 4; i++)
 109     controls[i + 4] = b.return_[i];
 110   return controls;
 111 }
 112
 113 Array<Offset>
 114 Bow::get_encompass_offset_arr () const
 115 {
 116   Offset d (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT],
 117     dy_f_drul_[RIGHT] - dy_f_drul_[LEFT]);
 118   d.x() += width (). length ();
 119
 120   Array<Offset> notes;
 121   notes.push (Offset (0, 0));
 122   notes.push (d);
 123
 124   return notes;
 125 }
 126