2 tie.cc -- implement Tie
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1998 Han-Wen Nienhuys <hanwen@stack.nl>
9 #include "paper-def.hh"
11 #include "note-head.hh"
14 #include "main.hh" // experimental features
16 IMPLEMENT_IS_TYPE_B1(Tie,Bow);
19 Tie::set_head (Direction d, Note_head * head_l)
21 assert (!head_l_drul_[d]);
22 head_l_drul_[d] = head_l;
23 set_bounds (d, head_l);
25 add_dependency (head_l);
30 head_l_drul_[RIGHT] =0;
31 head_l_drul_[LEFT] =0;
37 ugh: direction of the Tie is more complicated. See [Ross] p136 and further
40 Tie::set_default_dir()
42 int m= (head_l_drul_[LEFT]->position_i_
43 + head_l_drul_[RIGHT]->position_i_) /2;
44 dir_ = (m < 0)? DOWN : UP;
48 Tie::do_add_processing()
50 if (!(head_l_drul_[LEFT] && head_l_drul_[RIGHT]))
51 warning (_("Lonely tie.. "));
54 Drul_array<Note_head *> new_head_drul = head_l_drul_;
57 new_head_drul[d] = head_l_drul_[(Direction)-d];
58 } while (flip(&d) != LEFT);
59 head_l_drul_ = new_head_drul;
63 Tie::do_post_processing()
65 // URG: share code with slur!
66 assert (head_l_drul_[LEFT] || head_l_drul_[RIGHT]);
68 Real notewidth = paper ()->note_width ();
69 Real interline_f = paper ()->interline_f ();
70 Real tie_min = paper ()->get_var ("tie_x_minimum");
73 [OSU]: slur and tie placement
76 * x = inner raakpunt - d * gap
78 * y = length < 5ss : horizontal raakpunt
79 y = length >= 5ss : y next interline - d * 0.25 ss
80 --> height <= 5 length ?? we use <= 3 length, now...
83 Real gap_f = paper ()->get_var ("slur_x_gap");
88 dy_f_drul_[d] = .5 * interline_f * (head_l_drul_[d]
89 ? head_l_drul_[d]->position_i_
90 : head_l_drul_[(Direction)-d]->position_i_);
92 while (flip(&d) != LEFT);
96 // tie attached to outer notehead
97 if (head_l_drul_[d] && head_l_drul_[d]->extremal_i_)
100 dx_f_drul_[d] += notewidth;
101 dx_f_drul_[d] += -d * gap_f;
102 /* attach to outer 3/4 end of head */
103 dy_f_drul_[d] += dir_ * 0.25 * interline_f;
105 // tie attached to inner notehead
106 else if (head_l_drul_[d])
108 dx_f_drul_[d] += d*0.5 * notewidth;
110 // uhm? loose end of tie // tie attached to stem
113 dx_f_drul_[d] = -d * (spanned_drul_[d]->width ().length ()
117 while (flip(&d) != LEFT);
119 // now that both are set, do dependent
122 // tie attached to outer notehead
123 if (!head_l_drul_[d])
125 if (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT] < tie_min)
127 dx_f_drul_[d] -= d * tie_min
128 - (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT]);
129 dx_f_drul_[d] = dx_f_drul_[(Direction)-d] + d * tie_min;
132 dy_f_drul_[d] = dy_f_drul_[(Direction) -d];
135 while (flip(&d) != LEFT);
139 * slur from notehead to stemend: c''()b''
141 Real damp_f = paper ()->get_var ("tie_slope_damping");
142 Offset d_off = Offset (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT],
143 dy_f_drul_[RIGHT] - dy_f_drul_[LEFT]);
144 d_off.x () += width ().length ();
146 Real ratio_f = abs (d_off.y () / d_off.x ());
147 if (ratio_f > damp_f)
148 dy_f_drul_[(Direction)(- dir_ * sign (d_off.y ()))] -=
149 dir_ * (damp_f - ratio_f) * d_off.x ();
153 Tie::do_substitute_dependency (Score_elem*o, Score_elem*n)
155 Note_head *new_l =n?(Note_head*)n->item():0;
156 if (o->item() == head_l_drul_[LEFT])
157 head_l_drul_[LEFT] = new_l;
158 else if (o->item() == head_l_drul_[RIGHT])
159 head_l_drul_[RIGHT] = new_l;