2 tie.cc -- implement Tie
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "paper-def.hh"
11 #include "note-head.hh"
18 Tie::set_head (Direction d, Note_head * head_l)
20 assert (!head_l_drul_[d]);
21 head_l_drul_[d] = head_l;
22 set_bounds (d, head_l);
24 add_dependency (head_l);
29 head_l_drul_[RIGHT] =0;
30 head_l_drul_[LEFT] =0;
36 ugh: direction of the Tie is more complicated. See [Ross] p136 and further
39 Tie::set_default_dir()
41 int m= (head_l_drul_[LEFT]->position_i_
42 + head_l_drul_[RIGHT]->position_i_) /2;
43 dir_ = (m < 0)? DOWN : UP;
47 Tie::do_add_processing()
49 if (!(head_l_drul_[LEFT] && head_l_drul_[RIGHT]))
50 warning (_ ("lonely tie"));
53 Drul_array<Note_head *> new_head_drul = head_l_drul_;
56 new_head_drul[d] = head_l_drul_[(Direction)-d];
57 } while (flip(&d) != LEFT);
58 head_l_drul_ = new_head_drul;
62 Tie::do_post_processing()
64 // URG: share code with slur!
65 assert (head_l_drul_[LEFT] || head_l_drul_[RIGHT]);
67 Real notewidth = paper ()->note_width ();
68 Real interline_f = paper ()->interline_f ();
69 Real tie_min = paper ()->get_var ("tie_x_minimum");
72 [OSU]: slur and tie placement
75 * x = inner raakpunt - d * gap
77 * y = length < 5ss : horizontal raakpunt
78 y = length >= 5ss : y next interline - d * 0.25 ss
79 --> height <= 5 length ?? we use <= 3 length, now...
82 Real gap_f = paper ()->get_var ("slur_x_gap");
87 dy_f_drul_[d] = .5 * interline_f * (head_l_drul_[d]
88 ? head_l_drul_[d]->position_i_
89 : head_l_drul_[(Direction)-d]->position_i_);
91 while (flip(&d) != LEFT);
95 // tie attached to outer notehead
96 if (head_l_drul_[d] && head_l_drul_[d]->extremal_i_)
99 dx_f_drul_[d] += notewidth;
100 dx_f_drul_[d] += -d * gap_f;
101 /* attach to outer 3/4 end of head */
102 dy_f_drul_[d] += dir_ * 0.25 * interline_f;
104 // tie attached to inner notehead
105 else if (head_l_drul_[d] && d == LEFT)
107 dx_f_drul_[d] += -d * notewidth;
109 // uhm? loose end of tie // tie attached to stem
112 dx_f_drul_[d] = -d * (spanned_drul_[d]->width ().length ()
116 while (flip(&d) != LEFT);
118 // now that both are set, do dependent
121 // tie attached to outer notehead
122 if (!head_l_drul_[d])
124 if (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT] < tie_min)
126 dx_f_drul_[d] -= d * tie_min
127 - (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT]);
128 dx_f_drul_[d] = dx_f_drul_[(Direction)-d] + d * tie_min;
131 dy_f_drul_[d] = dy_f_drul_[(Direction) -d];
134 while (flip(&d) != LEFT);
138 * slur from notehead to stemend: c''()b''
140 Real damp_f = paper ()->get_var ("tie_slope_damping");
141 Offset d_off = Offset (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT],
142 dy_f_drul_[RIGHT] - dy_f_drul_[LEFT]);
143 d_off.x () += width ().length ();
145 Real ratio_f = abs (d_off.y () / d_off.x ());
146 if (ratio_f > damp_f)
147 dy_f_drul_[(Direction)(- dir_ * sign (d_off.y ()))] -=
148 dir_ * (damp_f - ratio_f) * d_off.x ();
152 Tie::do_substitute_dependency (Score_element*o, Score_element*n)
154 Note_head *new_l =n?dynamic_cast<Note_head *> (n):0;
155 if (dynamic_cast <Item *> (o) == head_l_drul_[LEFT])
156 head_l_drul_[LEFT] = new_l;
157 else if (dynamic_cast <Item *> (o) == head_l_drul_[RIGHT])
158 head_l_drul_[RIGHT] = new_l;