2 tie.cc -- implement Tie
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1999 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;
35 ugh: direction of the Tie is more complicated. See [Ross] p136 and further
38 Tie::get_default_dir() const
40 int m= (head_l_drul_[LEFT]->position_i_
41 + head_l_drul_[RIGHT]->position_i_) /2;
42 return(m < 0)? DOWN : UP;
46 Tie::do_add_processing()
48 if (!(head_l_drul_[LEFT] && head_l_drul_[RIGHT]))
49 warning (_ ("lonely tie"));
52 Drul_array<Note_head *> new_head_drul = head_l_drul_;
55 new_head_drul[d] = head_l_drul_[(Direction)-d];
56 } while (flip(&d) != LEFT);
57 head_l_drul_ = new_head_drul;
61 Tie::do_post_processing()
63 // URG: share code with slur!
64 assert (head_l_drul_[LEFT] || head_l_drul_[RIGHT]);
67 Real notewidth = paper_l ()->note_width () * 0.8;
68 Real interline_f = paper_l ()->get_realvar (interline_scm_sym);
71 [OSU]: slur and tie placement
74 * x = inner raakpunt - d * gap
76 * y = length < 5ss : horizontal raakpunt
77 y = length >= 5ss : y next interline - d * 0.25 ss
78 --> height <= 5 length ?? we use <= 3 length, now...
81 Real gap_f = paper_l ()->get_var ("slur_x_gap");
86 dy_f_drul_[d] = .5 * interline_f * (head_l_drul_[d]
87 ? head_l_drul_[d]->position_i_
88 : head_l_drul_[(Direction)-d]->position_i_);
90 while (flip(&d) != LEFT);
94 // tie attached to outer notehead
96 && head_l_drul_[d]->remove_elt_property (extremal_scm_sym) != SCM_BOOL_F)
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]->extent (X_AXIS).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 dy_f_drul_[d] = dy_f_drul_[(Direction) -d];
127 while (flip(&d) != LEFT);
131 * slur from notehead to stemend: c''()b''
133 Real damp_f = paper_l ()->get_var ("tie_slope_damping");
134 Offset d_off = Offset (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT],
135 dy_f_drul_[RIGHT] - dy_f_drul_[LEFT]);
136 d_off.x () += extent (X_AXIS).length ();
138 Real ratio_f = abs (d_off.y () / d_off.x ());
139 if (ratio_f > damp_f)
140 dy_f_drul_[(Direction)(- dir_ * sign (d_off.y ()))] +=
141 dir_ * (ratio_f - damp_f) * d_off.x ();
145 Tie::do_substitute_element_pointer (Score_element*o, Score_element*n)
147 Note_head *new_l =n?dynamic_cast<Note_head *> (n):0;
148 if (dynamic_cast <Item *> (o) == head_l_drul_[LEFT])
149 head_l_drul_[LEFT] = new_l;
150 else if (dynamic_cast <Item *> (o) == head_l_drul_[RIGHT])
151 head_l_drul_[RIGHT] = new_l;
156 Tie::get_rods () const
160 r.item_l_drul_ = spanned_drul_;
161 r.distance_f_ = paper_l ()->get_var ("tie_x_minimum");