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"
12 #include "paper-column.hh"
14 #include "staff-symbol-referencer.hh"
15 #include "directional-element-interface.hh"
18 Tie::set_head (Direction d, Item * head_l)
21 index_set_cell (get_elt_property ("heads"), d, head_l->self_scm_);
23 set_bounds (d, head_l);
24 add_dependency (head_l);
29 set_elt_property ("heads", gh_cons (SCM_EOL, SCM_EOL));
33 Tie::head (Direction d) const
35 SCM c = get_elt_property ("heads");
36 c = index_cell (c, d);
38 return dynamic_cast<Note_head*> (unsmob_element (c));
43 ugh: direction of the Tie is more complicated. See [Ross] p136 and further
46 Tie::get_default_dir () const
48 Real p1 = Staff_symbol_referencer_interface (head (LEFT)).position_f () ;
49 Real p2 = Staff_symbol_referencer_interface (head (RIGHT)).position_f () ;
51 int m = int (p1 + p2);
54 If dir is not determined: inverse of stem: down
55 (see stem::get_default_dir ())
57 Direction neutral_dir = (Direction)(int)paper_l ()->get_var ("stem_default_neutral_direction");
58 return (m == 0) ? other_dir (neutral_dir) : (m < 0) ? DOWN : UP;
62 Tie::do_add_processing()
64 if (!(head (LEFT) && head (RIGHT)))
65 warning (_ ("lonely tie"));
68 Drul_array<Note_head *> new_head_drul;
69 new_head_drul[LEFT] = head(LEFT);
70 new_head_drul[RIGHT] = head(RIGHT);
73 new_head_drul[d] = head((Direction)-d);
74 } while (flip(&d) != LEFT);
76 index_set_cell (get_elt_property ("heads"), LEFT, new_head_drul[LEFT]->self_scm_ );
77 index_set_cell (get_elt_property ("heads"), RIGHT, new_head_drul[LEFT]->self_scm_ );
82 Tie::do_post_processing()
84 if (!head (LEFT) && !head (RIGHT))
86 programming_error ("Tie without heads.");
87 set_elt_property ("transparent", SCM_BOOL_T);
93 Real staff_space = paper_l ()->get_var ("interline");
94 Real half_staff_space = staff_space / 2;
95 Real x_gap_f = paper_l ()->get_var ("tie_x_gap");
96 Real y_gap_f = paper_l ()->get_var ("tie_y_gap");
99 Slur and tie placement [OSU]
103 * x = inner vertical tangent - d * gap
109 OSU: not different for outer notes, so why all this code?
110 ie, can we drop this, or should it be made switchable.
116 Real head_width_f = head (d)
117 ? head (d)->extent (X_AXIS).length ()
120 side attached to outer (upper or lower) notehead of chord
127 to second tie, middle notehead seems not extremal
129 Getting scared a bit by score-element's comment:
130 // is this a good idea?
132 // FIXME extremal deprecated
133 && (head (d)->get_elt_property ("extremal")
137 dx_f_drul_[d] += head_width_f;
138 dx_f_drul_[d] += -d * x_gap_f;
141 side attached to inner notehead
145 dx_f_drul_[d] += -d * head_width_f;
147 } while (flip (&d) != LEFT);
152 dx_f_drul_[LEFT] = head (LEFT)->extent (X_AXIS).length ();
154 dx_f_drul_[LEFT] = get_broken_left_end_align ();
155 dx_f_drul_[LEFT] += x_gap_f;
156 dx_f_drul_[RIGHT] -= x_gap_f;
161 Slur and tie placement [OSU] -- check this
165 * y = dx < 5ss: horizontal tangent
166 y = dx >= 5ss: y next interline - d * 0.25 ss
168 which probably means that OSU assumes that
176 Real ypos = head (LEFT)
177 ? Staff_symbol_referencer_interface (head (LEFT)).position_f ()
178 : Staff_symbol_referencer_interface (head (RIGHT)).position_f () ;
180 Real y_f = half_staff_space * ypos;
181 int ypos_i = int (ypos);
183 Real dx_f = extent (X_AXIS).length () + dx_f_drul_[RIGHT] - dx_f_drul_[LEFT];
184 Direction dir = directional_element (this).get();
185 if (dx_f < paper_l ()->get_var ("tie_staffspace_length"))
187 if (abs (ypos_i) % 2)
188 y_f += dir * half_staff_space;
189 y_f += dir * y_gap_f;
193 if (! (abs (ypos_i) % 2))
194 y_f += dir * half_staff_space;
195 y_f += dir * half_staff_space;
196 y_f -= dir * y_gap_f;
199 dy_f_drul_[LEFT] = dy_f_drul_[RIGHT] = y_f;
205 Tie::get_rods () const
209 r.item_l_drul_ = spanned_drul_;
210 r.distance_f_ = paper_l ()->get_var ("tie_x_minimum");