2 slur-scoring.cc -- Score based slur formatting
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
7 Jan Nieuwenhuizen <janneke@gnu.org>
11 #include "slur-scoring.hh"
13 #include "accidental-interface.hh"
15 #include "directional-element-interface.hh"
16 #include "libc-extension.hh"
18 #include "note-column.hh"
19 #include "output-def.hh"
20 #include "paper-column.hh"
22 #include "pointer-group-interface.hh"
23 #include "slur-configuration.hh"
26 #include "staff-symbol-referencer.hh"
27 #include "staff-symbol.hh"
34 - curve around flag for y coordinate
36 - short-cut: try a smaller region first.
38 - handle non-visible stems better.
40 - try to prune number of scoring criteria
42 - take encompass-objects more into account when determining
45 - calculate encompass scoring directly after determining slur shape.
49 struct Slur_score_state;
51 Slur_score_state::Slur_score_state ()
55 edge_has_beams_ = false;
56 has_same_beam_ = false;
64 Slur_score_state::~Slur_score_state ()
66 junk_pointers (configurations_);
70 broken_trend_y (Slur_score_state const &state, Direction hdir)
72 /* A broken slur should maintain the same vertical trend
73 the unbroken slur would have had. */
75 if (Spanner *mother = dynamic_cast<Spanner *> (state.slur_->original ()))
77 vsize k = broken_spanner_index (state.slur_);
78 int j = int (k) + hdir;
79 if (j < 0 || vsize (j) >= mother->broken_intos_.size ())
82 Grob *neighbor = mother->broken_intos_[j];
83 Spanner *common_mother
84 = dynamic_cast<Spanner *> (state.common_[Y_AXIS]->original ());
86 = broken_spanner_index (dynamic_cast<Spanner *> (state.common_[Y_AXIS]));
87 int common_j = common_k + hdir;
89 if (common_j < 0 || vsize (common_j) >= common_mother->broken_intos_.size ())
92 Grob *common_next_system = common_mother->broken_intos_[common_j];
94 SCM last_point = scm_car (scm_last_pair (neighbor->get_property ("control-points")));
96 return scm_to_double (scm_cdr (last_point))
97 + neighbor->relative_coordinate (common_next_system, Y_AXIS);
103 copy slur dir forwards across line break.
106 Slur_score_state::set_next_direction ()
108 if (extremes_[RIGHT].note_column_)
111 if (Spanner *mother = dynamic_cast<Spanner *> (slur_->original ()))
113 vsize j = 1 + broken_spanner_index (slur_);
114 if (j >= mother->broken_intos_.size ())
117 Grob *neighbor = mother->broken_intos_[j];
118 set_grob_direction (neighbor, dir_);
123 Slur_score_state::get_encompass_info (Grob *col) const
125 Grob *stem = unsmob_grob (col->get_object ("stem"));
130 programming_error ("no stem for note column");
131 ei.x_ = col->relative_coordinate (common_[X_AXIS], X_AXIS);
132 ei.head_ = ei.stem_ = col->extent (common_[Y_AXIS],
136 Direction stem_dir = get_grob_direction (stem);
138 if (Grob *head = Note_column::first_head (col))
139 ei.x_ = head->extent (common_[X_AXIS], X_AXIS).center ();
141 ei.x_ = col->extent (common_[X_AXIS], X_AXIS).center ();
143 Grob *h = Stem::extremal_heads (stem)[Direction (dir_)];
146 ei.head_ = ei.stem_ = col->extent (common_[Y_AXIS], Y_AXIS)[dir_];
150 ei.head_ = h->extent (common_[Y_AXIS], Y_AXIS)[dir_];
152 if ((stem_dir == dir_)
153 && !stem->extent (stem, Y_AXIS).is_empty ())
155 ei.stem_ = stem->extent (common_[Y_AXIS], Y_AXIS)[dir_];
156 if (Grob *b = Stem::get_beam (stem))
157 ei.stem_ += stem_dir * 0.5 * Beam::get_thickness (b);
159 Interval x = stem->extent (common_[X_AXIS], X_AXIS);
160 ei.x_ = x.is_empty ()
161 ? stem->relative_coordinate (common_[X_AXIS], X_AXIS)
170 Drul_array<Bound_info>
171 Slur_score_state::get_bound_info () const
173 Drul_array<Bound_info> extremes;
176 Direction dir = dir_;
180 extremes[d].bound_ = slur_->get_bound (d);
181 if (Note_column::has_interface (extremes[d].bound_))
183 extremes[d].note_column_ = extremes[d].bound_;
184 extremes[d].stem_ = Note_column::get_stem (extremes[d].note_column_);
185 if (extremes[d].stem_)
187 extremes[d].stem_dir_ = get_grob_direction (extremes[d].stem_);
189 for (int a = X_AXIS; a < NO_AXES; a++)
192 Interval s = extremes[d].stem_->extent (common_[ax], ax);
196 do not issue warning. This happens for rests and
200 + extremes[d].stem_->relative_coordinate (common_[ax], ax);
202 extremes[d].stem_extent_[ax] = s;
205 extremes[d].slur_head_
206 = Stem::extremal_heads (extremes[d].stem_)[dir];
207 if (!extremes[d].slur_head_
208 && Note_column::has_rests (extremes[d].bound_))
209 extremes[d].slur_head_ = Note_column::get_rest (extremes[d].bound_);
210 extremes[d].staff_ = Staff_symbol_referencer
211 ::get_staff_symbol (extremes[d].stem_);
212 extremes[d].staff_space_ = Staff_symbol_referencer
213 ::staff_space (extremes[d].stem_);
216 if (extremes[d].slur_head_)
217 extremes[d].slur_head_x_extent_
218 = extremes[d].slur_head_->extent (common_[X_AXIS], X_AXIS);
222 while (flip (&d) != LEFT);
228 Slur_score_state::fill (Grob *me)
230 slur_ = dynamic_cast<Spanner *> (me);
232 = internal_extract_grob_array (me, ly_symbol2scm ("note-columns"));
234 if (columns_.empty ())
240 staff_space_ = Staff_symbol_referencer::staff_space (me);
241 Real lt = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
242 thickness_ = robust_scm2double (me->get_property ("thickness"), 1.0) * lt;
244 dir_ = get_grob_direction (me);
245 parameters_.fill (me);
247 extract_grob_set (me, "note-columns", columns);
248 extract_grob_set (me, "encompass-objects", extra_objects);
250 Spanner *sp = dynamic_cast<Spanner *> (me);
252 for (int i = X_AXIS; i < NO_AXES; i++)
255 common_[a] = common_refpoint_of_array (columns, me, a);
256 common_[a] = common_refpoint_of_array (extra_objects, common_[a], a);
262 If bound is not in note-columns, we don't want to know about
266 common_[a] = common_[a]->common_refpoint (sp->get_bound (d), a);
268 while (flip (&d) != LEFT);
271 extremes_ = get_bound_info ();
272 is_broken_ = (!extremes_[LEFT].note_column_
273 || !extremes_[RIGHT].note_column_);
276 = (extremes_[LEFT].stem_ && extremes_[RIGHT].stem_
277 && Stem::get_beam (extremes_[LEFT].stem_) == Stem::get_beam (extremes_[RIGHT].stem_));
279 base_attachments_ = get_base_attachments ();
281 Drul_array<Real> end_ys
282 = get_y_attachment_range ();
284 configurations_ = enumerate_attachments (end_ys);
285 for (vsize i = 0; i < columns_.size (); i++)
286 encompass_infos_.push_back (get_encompass_info (columns_[i]));
288 extra_encompass_infos_ = get_extra_encompass_infos ();
296 && extremes_[d].slur_head_)
298 * extremes_[d].slur_head_->relative_coordinate (common_[Y_AXIS], Y_AXIS);
300 while (flip (&d) != LEFT);
303 = (extremes_[LEFT].stem_ && Stem::get_beam (extremes_[LEFT].stem_))
304 || (extremes_[RIGHT].stem_ && Stem::get_beam (extremes_[RIGHT].stem_));
306 set_next_direction ();
313 MAKE_SCHEME_CALLBACK(Slur, calc_control_points, 1)
315 Slur::calc_control_points (SCM smob)
317 Spanner *me = unsmob_spanner (smob);
319 Slur_score_state state;
325 state.generate_curves ();
327 SCM end_ys = me->get_property ("positions");
330 if (is_number_pair (end_ys))
331 best = state.configurations_[state.get_closest_index (end_ys)]->curve_;
333 best = state.get_best_curve ();
335 SCM controls = SCM_EOL;
336 for (int i = 4; i--;)
338 Offset o = best.control_[i]
339 - Offset (me->relative_coordinate (state.common_[X_AXIS], X_AXIS),
340 me->relative_coordinate (state.common_[Y_AXIS], Y_AXIS));
341 controls = scm_cons (ly_offset2scm (o), controls);
348 Slur_score_state::get_best_curve ()
353 #if DEBUG_SLUR_SCORING
354 bool debug_slurs = to_boolean (slur_->layout ()
355 ->lookup_variable (ly_symbol2scm ("debug-slur-scoring")));
356 SCM inspect_quants = slur_->get_property ("inspect-quants");
357 SCM inspect_index = slur_->get_property ("inspect-index");
359 && scm_is_integer (inspect_index))
361 opt_idx = scm_to_int (inspect_index);
362 configurations_[opt_idx]->calculate_score (*this);
363 opt = configurations_[opt_idx]->score ();
366 && scm_is_pair (inspect_quants))
368 opt_idx = get_closest_index (inspect_quants);
369 configurations_[opt_idx]->calculate_score (*this);
370 opt = configurations_[opt_idx]->score ();
375 for (vsize i = 0; i < configurations_.size (); i++)
376 configurations_[i]->calculate_score (*this);
377 for (vsize i = 0; i < configurations_.size (); i++)
379 if (configurations_[i]->score () < opt)
381 opt = configurations_[i]->score ();
387 #if DEBUG_SLUR_SCORING
393 total = configurations_[opt_idx]->card ();
394 total += to_string (" TOTAL=%.2f idx=%d", configurations_[opt_idx]->score (), opt_idx);
401 slur_->set_property ("quant-score",
402 scm_makfrom0str (total.c_str ()));
409 programming_error ("No optimal slur found. Guessing 0.");
412 return configurations_[opt_idx]->curve_;
416 Slur_score_state::get_closest_index (SCM inspect_quants) const
418 Drul_array<Real> ins = ly_scm2interval (inspect_quants);
422 for (vsize i = 0; i < configurations_.size (); i++)
424 Real d = fabs (configurations_[i]->attachment_[LEFT][Y_AXIS] - ins[LEFT])
425 + fabs (configurations_[i]->attachment_[RIGHT][Y_AXIS] - ins[RIGHT]);
433 programming_error ("can't not find quant");
438 TODO: should analyse encompasses to determine sensible region, and
439 should limit slopes available.
443 Slur_score_state::get_y_attachment_range () const
445 Drul_array<Real> end_ys;
449 if (extremes_[d].note_column_)
452 * max (max (dir_ * (base_attachments_[d][Y_AXIS]
453 + parameters_.region_size_ * dir_),
454 dir_ * (dir_ + extremes_[d].note_column_->extent (common_[Y_AXIS], Y_AXIS)[dir_])),
455 dir_ * base_attachments_[-d][Y_AXIS]);
458 end_ys[d] = base_attachments_[d][Y_AXIS] + parameters_.region_size_ * dir_;
460 while (flip (&d) != LEFT);
466 spanner_less (Spanner *s1, Spanner *s2)
472 b1[d] = s1->get_bound (d)->get_column ()->get_rank ();
473 b2[d] = s2->get_bound (d)->get_column ()->get_rank ();
475 while (flip (&d) != LEFT);
477 return b2[LEFT] <= b1[LEFT] && b2[RIGHT] >= b1[RIGHT]
478 && (b2[LEFT] != b1[LEFT] || b2[RIGHT] != b1[RIGHT]);
482 Slur_score_state::get_base_attachments () const
484 Drul_array<Offset> base_attachment;
488 Grob *stem = extremes_[d].stem_;
489 Grob *head = extremes_[d].slur_head_;
493 if (extremes_[d].note_column_)
497 fixme: X coord should also be set in this case.
500 && !Stem::is_invisible (stem)
501 && extremes_[d].stem_dir_ == dir_
502 && Stem::get_beaming (stem, -d)
503 && Stem::get_beam (stem)
504 && (!spanner_less (slur_, Stem::get_beam (stem))
506 y = extremes_[d].stem_extent_[Y_AXIS][dir_];
508 y = head->extent (common_[Y_AXIS], Y_AXIS)[dir_];
509 y += dir_ * 0.5 * staff_space_;
511 y = move_away_from_staffline (y, head);
513 Grob *fh = Note_column::first_head (extremes_[d].note_column_);
515 = (fh ? fh->extent (common_[X_AXIS], X_AXIS)
516 : extremes_[d].bound_->extent (common_[X_AXIS], X_AXIS))
517 .linear_combination (CENTER);
519 base_attachment[d] = Offset (x, y);
521 while (flip (&d) != LEFT);
525 if (!extremes_[d].note_column_)
529 x = robust_relative_extent (extremes_[d].bound_, common_[X_AXIS], X_AXIS)[d];
531 x = slur_->get_broken_left_end_align ();
532 Grob *col = (d == LEFT) ? columns_[0] : columns_.back ();
534 if (extremes_[-d].bound_ != col)
536 y = robust_relative_extent (col, common_[Y_AXIS], Y_AXIS)[dir_];
537 y += dir_ * 0.5 * staff_space_;
539 if (get_grob_direction (col) == dir_
540 && Note_column::get_stem (col)
541 && !Stem::is_invisible (Note_column::get_stem (col)))
542 y -= dir_ * 1.5 * staff_space_;
545 y = base_attachment[-d][Y_AXIS];
547 y = move_away_from_staffline (y, col);
549 base_attachment[d] = Offset (x, y);
552 while (flip (&d) != LEFT);
556 for (int a = X_AXIS; a < NO_AXES; a++)
558 Real &b = base_attachment[d][Axis (a)];
560 if (isinf (b) || isnan (b))
562 programming_error ("slur attachment is inf/nan");
567 while (flip (&d) != LEFT);
569 return base_attachment;
573 Slur_score_state::move_away_from_staffline (Real y,
574 Grob *on_staff) const
579 Grob *staff_symbol = Staff_symbol_referencer::get_staff_symbol (on_staff);
584 = (y - staff_symbol->relative_coordinate (common_[Y_AXIS],
586 * 2.0 / staff_space_;
588 if (fabs (pos - my_round (pos)) < 0.2
589 && Staff_symbol_referencer::on_line (on_staff, (int) rint (pos))
590 && Staff_symbol_referencer::line_count (on_staff) - 1 >= rint (pos))
591 y += 1.5 * staff_space_ * dir_ / 10;
597 Slur_score_state::generate_avoid_offsets () const
599 vector<Offset> avoid;
600 vector<Grob*> encompasses = columns_;
602 for (vsize i = 0; i < encompasses.size (); i++)
604 if (extremes_[LEFT].note_column_ == encompasses[i]
605 || extremes_[RIGHT].note_column_ == encompasses[i])
608 Encompass_info inf (get_encompass_info (encompasses[i]));
609 Real y = dir_ * (max (dir_ * inf.head_, dir_ * inf.stem_));
611 avoid.push_back (Offset (inf.x_, y + dir_ * parameters_.free_head_distance_));
614 extract_grob_set (slur_, "encompass-objects", extra_encompasses);
615 for (vsize i = 0; i < extra_encompasses.size (); i++)
617 if (Slur::has_interface (extra_encompasses[i]))
619 Grob *small_slur = extra_encompasses[i];
620 Bezier b = Slur::get_curve (small_slur);
622 Offset z = b.curve_point (0.5);
623 z += Offset (small_slur->relative_coordinate (common_[X_AXIS], X_AXIS),
624 small_slur->relative_coordinate (common_[Y_AXIS], Y_AXIS));
626 z[Y_AXIS] += dir_ * parameters_.free_slur_distance_;
629 else if (extra_encompasses[i]->get_property ("avoid-slur") == ly_symbol2scm ("inside"))
631 Grob *g = extra_encompasses [i];
632 Interval xe = g->extent (common_[X_AXIS], X_AXIS);
633 Interval ye = g->extent (common_[Y_AXIS], Y_AXIS);
637 avoid.push_back (Offset (xe.center(), ye[dir_]));
644 Slur_score_state::generate_curves () const
646 Real r_0 = robust_scm2double (slur_->get_property ("ratio"), 0.33);
647 Real h_inf = staff_space_ * scm_to_double (slur_->get_property ("height-limit"));
649 vector<Offset> avoid = generate_avoid_offsets ();
650 for (vsize i = 0; i < configurations_.size (); i++)
651 configurations_[i]->generate_curve (*this, r_0, h_inf, avoid);
654 vector<Slur_configuration*>
655 Slur_score_state::enumerate_attachments (Drul_array<Real> end_ys) const
657 vector<Slur_configuration*> scores;
659 Drul_array<Offset> os;
660 os[LEFT] = base_attachments_[LEFT];
661 Real minimum_length = staff_space_
662 * robust_scm2double (slur_->get_property ("minimum-length"), 2.0);
664 for (int i = 0; dir_ * os[LEFT][Y_AXIS] <= dir_ * end_ys[LEFT]; i++)
666 os[RIGHT] = base_attachments_[RIGHT];
667 for (int j = 0; dir_ * os[RIGHT][Y_AXIS] <= dir_ * end_ys[RIGHT]; j++)
669 Slur_configuration s;
671 Drul_array<bool> attach_to_stem (false, false);
674 os[d][X_AXIS] = base_attachments_[d][X_AXIS];
675 if (extremes_[d].stem_
676 && !Stem::is_invisible (extremes_[d].stem_)
677 && extremes_[d].stem_dir_ == dir_)
679 Interval stem_y = extremes_[d].stem_extent_[Y_AXIS];
680 stem_y.widen (0.25 * staff_space_);
681 if (stem_y.contains (os[d][Y_AXIS]))
683 os[d][X_AXIS] = extremes_[d].stem_extent_[X_AXIS][-d]
685 attach_to_stem[d] = true;
687 else if (dir_ * extremes_[d].stem_extent_[Y_AXIS][dir_]
688 < dir_ * os[d][Y_AXIS]
689 && !extremes_[d].stem_extent_[X_AXIS].is_empty ())
691 os[d][X_AXIS] = extremes_[d].stem_extent_[X_AXIS].center ();
694 while (flip (&d) != LEFT);
697 dz = os[RIGHT] - os[LEFT];
698 if (dz[X_AXIS] < minimum_length
699 || fabs (dz[Y_AXIS] / dz[X_AXIS]) > parameters_.max_slope_)
703 if (extremes_[d].slur_head_
704 && !extremes_[d].slur_head_x_extent_.is_empty ())
706 os[d][X_AXIS] = extremes_[d].slur_head_x_extent_.center ();
707 attach_to_stem[d] = false;
710 while (flip (&d) != LEFT);
713 dz = os[RIGHT] - os[LEFT];
716 if (extremes_[d].slur_head_
717 && !attach_to_stem[d])
719 /* Horizontally move tilted slurs a little. Move
720 more for bigger tilts.
724 -= dir_ * extremes_[d].slur_head_x_extent_.length ()
725 * sin (dz.arg ()) / 3;
728 while (flip (&d) != LEFT);
731 s.index_ = scores.size ();
733 scores.push_back (new Slur_configuration (s));
735 os[RIGHT][Y_AXIS] += dir_ * staff_space_ / 2;
738 os[LEFT][Y_AXIS] += dir_ * staff_space_ / 2;
741 assert (scores.size () > 0);
745 vector<Extra_collision_info>
746 Slur_score_state::get_extra_encompass_infos () const
748 extract_grob_set (slur_, "encompass-objects", encompasses);
749 vector<Extra_collision_info> collision_infos;
750 for (vsize i = encompasses.size (); i--;)
752 if (Slur::has_interface (encompasses[i]))
754 Spanner *small_slur = dynamic_cast<Spanner *> (encompasses[i]);
755 Bezier b = Slur::get_curve (small_slur);
757 Offset relative (small_slur->relative_coordinate (common_[X_AXIS], X_AXIS),
758 small_slur->relative_coordinate (common_[Y_AXIS], Y_AXIS));
760 for (int k = 0; k < 3; k++)
762 Direction hdir = Direction (k - 1);
765 Only take bound into account if small slur starts
766 together with big slur.
768 if (hdir && small_slur->get_bound (hdir) != slur_->get_bound (hdir))
771 Offset z = b.curve_point (k / 2.0);
776 yext[dir_] = z[Y_AXIS] + dir_ * thickness_ * 1.0;
778 Interval xext (-1, 1);
779 xext = xext * (thickness_ * 2) + z[X_AXIS];
780 Extra_collision_info info (small_slur,
784 parameters_.extra_object_collision_penalty_);
785 collision_infos.push_back (info);
790 Grob *g = encompasses [i];
791 Interval xe = g->extent (common_[X_AXIS], X_AXIS);
792 Interval ye = g->extent (common_[Y_AXIS], Y_AXIS);
795 Real penalty = parameters_.extra_object_collision_penalty_;
796 if (Accidental_interface::has_interface (g))
798 penalty = parameters_.accidental_collision_;
799 /* Begin copy accidental.cc */
801 if (to_boolean (g->get_property ("cautionary")))
803 SCM cstyle = g->get_property ("cautionary-style");
804 parens = ly_is_equal (cstyle, ly_symbol2scm ("parentheses"));
807 SCM accs = g->get_property ("accidentals");
808 SCM scm_style = g->get_property ("style");
809 if (!scm_is_symbol (scm_style)
811 && scm_ilength (accs) == 1)
813 /* End copy accidental.cc */
814 switch (scm_to_int (scm_car (accs)))
830 ye.widen (thickness_ * 0.5);
831 xe.widen (thickness_ * 1.0);
832 Extra_collision_info info (g, xp, xe, ye, penalty);
833 collision_infos.push_back (info);
837 return collision_infos;
840 Extra_collision_info::Extra_collision_info (Grob *g, Real idx, Interval x, Interval y, Real p)
843 extents_[X_AXIS] = x;
844 extents_[Y_AXIS] = y;
847 type_ = g->get_property ("avoid-slur");
850 Extra_collision_info::Extra_collision_info ()