2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1996--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
5 Jan Nieuwenhuizen <janneke@gnu.org>
7 LilyPond is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 LilyPond is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
21 #include "slur-scoring.hh"
25 #include "axis-group-interface.hh"
26 #include "accidental-interface.hh"
29 #include "directional-element-interface.hh"
31 #include "libc-extension.hh"
34 #include "note-column.hh"
35 #include "output-def.hh"
36 #include "paper-column.hh"
38 #include "pointer-group-interface.hh"
39 #include "slur-configuration.hh"
42 #include "staff-symbol-referencer.hh"
43 #include "staff-symbol.hh"
50 - curve around flag for y coordinate
52 - short-cut: try a smaller region first.
54 - handle non-visible stems better.
56 - try to prune number of scoring criteria
58 - take encompass-objects more into account when determining
61 - calculate encompass scoring directly after determining slur shape.
65 struct Slur_score_state;
67 Slur_score_state::Slur_score_state ()
71 edge_has_beams_ = false;
72 has_same_beam_ = false;
80 Slur_score_state::~Slur_score_state ()
82 junk_pointers (configurations_);
86 If a slur is broken across a line break, the direction
87 of the post-break slur must be the same as the pre-break
91 Slur_score_state::slur_direction () const
93 Grob *left_neighbor = slur_->broken_neighbor (LEFT);
95 if (left_neighbor && left_neighbor->is_live ())
96 return get_grob_direction (left_neighbor);
98 Direction dir = get_grob_direction (slur_);
100 if (Grob *right_neighbor = slur_->broken_neighbor (RIGHT))
101 set_grob_direction (right_neighbor, dir);
107 Slur_score_state::get_encompass_info (Grob *col) const
109 Grob *stem = Grob::unsmob (col->get_object ("stem"));
114 programming_error ("no stem for note column");
115 ei.x_ = col->relative_coordinate (common_[X_AXIS], X_AXIS);
116 ei.head_ = ei.stem_ = col->extent (common_[Y_AXIS],
120 Direction stem_dir = get_grob_direction (stem);
122 if (Grob *head = Note_column::first_head (col))
123 ei.x_ = head->extent (common_[X_AXIS], X_AXIS).center ();
125 ei.x_ = col->extent (common_[X_AXIS], X_AXIS).center ();
127 Grob *h = Stem::extremal_heads (stem)[Direction (dir_)];
130 ei.head_ = ei.stem_ = col->extent (common_[Y_AXIS], Y_AXIS)[dir_];
134 ei.head_ = h->extent (common_[Y_AXIS], Y_AXIS)[dir_];
136 if ((stem_dir == dir_)
137 && !stem->extent (stem, Y_AXIS).is_empty ())
139 ei.stem_ = stem->extent (common_[Y_AXIS], Y_AXIS)[dir_];
140 if (Grob *b = Stem::get_beam (stem))
141 ei.stem_ += stem_dir * 0.5 * Beam::get_beam_thickness (b);
143 Interval x = stem->extent (common_[X_AXIS], X_AXIS);
144 ei.x_ = x.is_empty ()
145 ? stem->relative_coordinate (common_[X_AXIS], X_AXIS)
154 Drul_array<Bound_info>
155 Slur_score_state::get_bound_info () const
157 Drul_array<Bound_info> extremes;
159 Direction dir = dir_;
161 for (LEFT_and_RIGHT (d))
163 extremes[d].bound_ = slur_->get_bound (d);
164 if (Note_column::has_interface (extremes[d].bound_))
166 extremes[d].note_column_ = extremes[d].bound_;
167 extremes[d].stem_ = Note_column::get_stem (extremes[d].note_column_);
168 extremes[d].flag_ = Note_column::get_flag (extremes[d].note_column_);
170 if (extremes[d].stem_)
172 extremes[d].stem_dir_ = get_grob_direction (extremes[d].stem_);
174 for (int a = X_AXIS; a < NO_AXES; a++)
177 Interval s = extremes[d].stem_->extent (common_[ax], ax);
178 if (extremes[d].flag_)
179 s.unite (extremes[d].flag_->extent (common_[ax], ax));
183 do not issue warning. This happens for rests and
187 + extremes[d].stem_->relative_coordinate (common_[ax], ax);
189 extremes[d].stem_extent_[ax] = s;
192 extremes[d].slur_head_
193 = Stem::extremal_heads (extremes[d].stem_)[dir];
194 if (!extremes[d].slur_head_
195 && Note_column::has_rests (extremes[d].bound_))
196 extremes[d].slur_head_ = Note_column::get_rest (extremes[d].bound_);
197 extremes[d].staff_ = Staff_symbol_referencer
198 ::get_staff_symbol (extremes[d].stem_);
199 extremes[d].staff_space_ = Staff_symbol_referencer
200 ::staff_space (extremes[d].stem_);
203 if (extremes[d].slur_head_)
204 extremes[d].slur_head_x_extent_
205 = extremes[d].slur_head_->extent (common_[X_AXIS], X_AXIS);
214 Slur_score_state::fill (Grob *me)
216 slur_ = dynamic_cast<Spanner *> (me);
218 = internal_extract_grob_array (me, ly_symbol2scm ("note-columns"));
220 if (columns_.empty ())
226 Slur::replace_breakable_encompass_objects (me);
227 staff_space_ = Staff_symbol_referencer::staff_space (me);
228 line_thickness_ = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
229 thickness_ = robust_scm2double (me->get_property ("thickness"), 1.0) * line_thickness_;
231 dir_ = slur_direction ();
232 parameters_.fill (me);
234 extract_grob_set (me, "note-columns", columns);
235 extract_grob_set (me, "encompass-objects", extra_objects);
237 Spanner *sp = dynamic_cast<Spanner *> (me);
239 for (int i = X_AXIS; i < NO_AXES; i++)
242 common_[a] = common_refpoint_of_array (columns, me, a);
243 common_[a] = common_refpoint_of_array (extra_objects, common_[a], a);
245 for (LEFT_and_RIGHT (d))
248 If bound is not in note-columns, we don't want to know about
252 common_[a] = common_[a]->common_refpoint (sp->get_bound (d), a);
256 extremes_ = get_bound_info ();
257 is_broken_ = (!extremes_[LEFT].note_column_
258 || !extremes_[RIGHT].note_column_);
261 = (extremes_[LEFT].stem_ && extremes_[RIGHT].stem_
262 && Stem::get_beam (extremes_[LEFT].stem_) == Stem::get_beam (extremes_[RIGHT].stem_));
264 base_attachments_ = get_base_attachments ();
266 Drul_array<Real> end_ys
267 = get_y_attachment_range ();
269 extra_encompass_infos_ = get_extra_encompass_infos ();
271 Interval additional_ys (0.0, 0.0);
273 for (vsize i = 0; i < extra_encompass_infos_.size (); i++)
275 if (extra_encompass_infos_[i].extents_[X_AXIS].is_empty ())
278 Real y_place = linear_interpolate (extra_encompass_infos_[i].extents_[X_AXIS].center (),
279 base_attachments_[RIGHT][X_AXIS],
280 base_attachments_[LEFT][X_AXIS],
283 Real encompass_place = extra_encompass_infos_[i].extents_[Y_AXIS][dir_];
284 if (extra_encompass_infos_[i].type_ == ly_symbol2scm ("inside")
285 && minmax (dir_, encompass_place, y_place) == encompass_place
286 && (!extra_encompass_infos_[i].grob_->internal_has_interface (ly_symbol2scm ("key-signature-interface"))
287 && !Clef::has_interface (extra_encompass_infos_[i].grob_)
288 && !extra_encompass_infos_[i].grob_->internal_has_interface (ly_symbol2scm ("time-signature-interface"))))
290 for (LEFT_and_RIGHT (d))
291 additional_ys[d] = minmax (dir_,
294 * (parameters_.encompass_object_range_overshoot_
295 + (y_place - encompass_place)
296 * (normalize (extra_encompass_infos_[i].extents_[X_AXIS].center (),
297 base_attachments_[RIGHT][X_AXIS],
298 base_attachments_[LEFT][X_AXIS])
299 + (dir_ == LEFT ? 0 : -1)))));
303 for (LEFT_and_RIGHT (d))
304 end_ys[d] += additional_ys[d];
306 configurations_ = enumerate_attachments (end_ys);
307 for (vsize i = 0; i < columns_.size (); i++)
308 encompass_infos_.push_back (get_encompass_info (columns_[i]));
313 for (LEFT_and_RIGHT (d))
316 && extremes_[d].slur_head_)
318 * extremes_[d].slur_head_->relative_coordinate (common_[Y_AXIS], Y_AXIS);
322 = (extremes_[LEFT].stem_ && Stem::get_beam (extremes_[LEFT].stem_))
323 || (extremes_[RIGHT].stem_ && Stem::get_beam (extremes_[RIGHT].stem_));
329 MAKE_SCHEME_CALLBACK (Slur, calc_control_points, 1)
331 Slur::calc_control_points (SCM smob)
333 Spanner *me = Spanner::unsmob (smob);
335 Slur_score_state state;
341 state.generate_curves ();
343 SCM end_ys = me->get_property ("positions");
344 SCM inspect_quants = me->get_property ("inspect-quants");
345 bool debug_slurs = to_boolean (me->layout ()
346 ->lookup_variable (ly_symbol2scm ("debug-slur-scoring")));
348 if (is_number_pair (inspect_quants))
351 end_ys = inspect_quants;
354 Slur_configuration *best = NULL;
355 if (is_number_pair (end_ys))
356 best = state.get_forced_configuration (ly_scm2interval (end_ys));
358 best = state.get_best_curve ();
360 #if DEBUG_SLUR_SCORING
363 string total = best->card ();
364 total += to_string (" TOTAL=%.2f idx=%d", best->score (), best->index_);
365 me->set_property ("annotation", ly_string2scm (total));
369 SCM controls = SCM_EOL;
370 for (int i = 4; i--;)
372 Offset o = best->curve_.control_[i]
373 - Offset (me->relative_coordinate (state.common_[X_AXIS], X_AXIS),
374 me->relative_coordinate (state.common_[Y_AXIS], Y_AXIS));
375 controls = scm_cons (ly_offset2scm (o), controls);
382 Slur_score_state::get_forced_configuration (Interval ys) const
384 Slur_configuration *best = NULL;
386 for (vsize i = 0; i < configurations_.size (); i++)
388 Real d = fabs (configurations_[i]->attachment_[LEFT][Y_AXIS] - ys[LEFT])
389 + fabs (configurations_[i]->attachment_[RIGHT][Y_AXIS] - ys[RIGHT]);
392 best = configurations_[i];
397 while (!best->done ())
398 best->run_next_scorer (*this);
401 programming_error ("cannot find quant");
407 Slur_score_state::get_best_curve () const
409 std::priority_queue < Slur_configuration *, std::vector<Slur_configuration *>,
410 Slur_configuration_less > queue;
411 for (vsize i = 0; i < configurations_.size (); i++)
412 queue.push (configurations_[i]);
414 Slur_configuration *best = NULL;
422 best->run_next_scorer (*this);
430 Slur_score_state::breakable_bound_extent (Direction d) const
432 Grob *col = slur_->get_bound (d)->get_column ();
436 extract_grob_set (slur_, "encompass-objects", extra_encompasses);
438 for (vsize i = 0; i < extra_encompasses.size (); i++)
440 Item *item = dynamic_cast<Item *> (extra_encompasses[i]);
441 if (item && col == item->get_column ())
442 ret.unite (robust_relative_extent (item, common_[X_AXIS], X_AXIS));
449 TODO: should analyse encompasses to determine sensible region, and
450 should limit slopes available.
454 Slur_score_state::get_y_attachment_range () const
456 Drul_array<Real> end_ys;
457 for (LEFT_and_RIGHT (d))
459 if (extremes_[d].note_column_)
461 Interval nc_extent = extremes_[d].note_column_
462 ->extent (common_[Y_AXIS], Y_AXIS);
463 if (nc_extent.is_empty ())
464 slur_->warning ("slur trying to encompass an empty note column.");
467 * max (max (dir_ * (base_attachments_[d][Y_AXIS]
468 + parameters_.region_size_ * dir_),
469 dir_ * (dir_ + nc_extent[dir_])),
470 dir_ * base_attachments_[-d][Y_AXIS]);
473 end_ys[d] = base_attachments_[d][Y_AXIS] + parameters_.region_size_ * dir_;
480 spanner_less (Spanner *s1, Spanner *s2)
483 for (LEFT_and_RIGHT (d))
485 b1[d] = s1->get_bound (d)->get_column ()->get_rank ();
486 b2[d] = s2->get_bound (d)->get_column ()->get_rank ();
489 return b2[LEFT] <= b1[LEFT] && b2[RIGHT] >= b1[RIGHT]
490 && (b2[LEFT] != b1[LEFT] || b2[RIGHT] != b1[RIGHT]);
494 Slur_score_state::get_base_attachments () const
496 Drul_array<Offset> base_attachment;
497 for (LEFT_and_RIGHT (d))
499 Grob *stem = extremes_[d].stem_;
500 Grob *head = extremes_[d].slur_head_;
504 if (extremes_[d].note_column_)
508 fixme: X coord should also be set in this case.
511 && !Stem::is_invisible (stem)
512 && extremes_[d].stem_dir_ == dir_
513 && Stem::get_beaming (stem, -d)
514 && Stem::get_beam (stem)
515 && (!spanner_less (slur_, Stem::get_beam (stem))
517 y = extremes_[d].stem_extent_[Y_AXIS][dir_];
519 y = head->extent (common_[Y_AXIS], Y_AXIS)[dir_];
520 y += dir_ * 0.5 * staff_space_;
522 y = move_away_from_staffline (y, head);
524 Grob *fh = Note_column::first_head (extremes_[d].note_column_);
526 = (fh ? fh->extent (common_[X_AXIS], X_AXIS)
527 : extremes_[d].bound_->extent (common_[X_AXIS], X_AXIS))
528 .linear_combination (CENTER);
530 base_attachment[d] = Offset (x, y);
533 for (LEFT_and_RIGHT (d))
535 if (!extremes_[d].note_column_)
540 Interval ext = breakable_bound_extent (d);
542 ext = Axis_group_interface::
543 generic_bound_extent (extremes_[d].bound_,
544 common_[X_AXIS], X_AXIS);
547 Grob *col = (d == LEFT) ? columns_[0] : columns_.back ();
549 if (extremes_[-d].bound_ != col)
551 y = robust_relative_extent (col, common_[Y_AXIS], Y_AXIS)[dir_];
552 y += dir_ * 0.5 * staff_space_;
554 if (get_grob_direction (col) == dir_
555 && Note_column::get_stem (col)
556 && !Stem::is_invisible (Note_column::get_stem (col)))
557 y -= dir_ * 1.5 * staff_space_;
560 y = base_attachment[-d][Y_AXIS];
562 y = move_away_from_staffline (y, col);
564 base_attachment[d] = Offset (x, y);
568 for (LEFT_and_RIGHT (d))
570 for (int a = X_AXIS; a < NO_AXES; a++)
572 Real &b = base_attachment[d][Axis (a)];
574 if (isinf (b) || isnan (b))
576 programming_error ("slur attachment is inf/nan");
582 return base_attachment;
586 Slur_score_state::move_away_from_staffline (Real y,
587 Grob *on_staff) const
592 Grob *staff_symbol = Staff_symbol_referencer::get_staff_symbol (on_staff);
597 = (y - staff_symbol->relative_coordinate (common_[Y_AXIS],
599 * 2.0 / staff_space_;
601 if (fabs (pos - my_round (pos)) < 0.2
602 && Staff_symbol_referencer::on_staff_line (on_staff, (int) rint (pos)))
603 y += 1.5 * staff_space_ * dir_ / 10;
609 Slur_score_state::generate_avoid_offsets () const
611 vector<Offset> avoid;
612 vector<Grob *> encompasses = columns_;
614 for (vsize i = 0; i < encompasses.size (); i++)
616 if (extremes_[LEFT].note_column_ == encompasses[i]
617 || extremes_[RIGHT].note_column_ == encompasses[i])
620 Encompass_info inf (get_encompass_info (encompasses[i]));
621 Real y = dir_ * (max (dir_ * inf.head_, dir_ * inf.stem_));
623 avoid.push_back (Offset (inf.x_, y + dir_ * parameters_.free_head_distance_));
626 extract_grob_set (slur_, "encompass-objects", extra_encompasses);
627 for (vsize i = 0; i < extra_encompasses.size (); i++)
629 if (Slur::has_interface (extra_encompasses[i]))
631 Grob *small_slur = extra_encompasses[i];
632 Bezier b = Slur::get_curve (small_slur);
634 Offset z = b.curve_point (0.5);
635 z += Offset (small_slur->relative_coordinate (common_[X_AXIS], X_AXIS),
636 small_slur->relative_coordinate (common_[Y_AXIS], Y_AXIS));
638 z[Y_AXIS] += dir_ * parameters_.free_slur_distance_;
641 else if (extra_encompasses[i]->get_property ("avoid-slur") == ly_symbol2scm ("inside"))
643 Grob *g = extra_encompasses [i];
644 Interval xe = g->extent (common_[X_AXIS], X_AXIS);
645 Interval ye = g->extent (common_[Y_AXIS], Y_AXIS);
649 avoid.push_back (Offset (xe.center (), ye[dir_]));
656 Slur_score_state::generate_curves () const
658 Real r_0 = robust_scm2double (slur_->get_property ("ratio"), 0.33);
659 Real h_inf = staff_space_ * scm_to_double (slur_->get_property ("height-limit"));
661 vector<Offset> avoid = generate_avoid_offsets ();
662 for (vsize i = 0; i < configurations_.size (); i++)
663 configurations_[i]->generate_curve (*this, r_0, h_inf, avoid);
666 vector<Slur_configuration *>
667 Slur_score_state::enumerate_attachments (Drul_array<Real> end_ys) const
669 vector<Slur_configuration *> scores;
671 Drul_array<Offset> os;
672 os[LEFT] = base_attachments_[LEFT];
673 Real minimum_length = staff_space_
674 * robust_scm2double (slur_->get_property ("minimum-length"), 2.0);
676 for (int i = 0; dir_ * os[LEFT][Y_AXIS] <= dir_ * end_ys[LEFT]; i++)
678 os[RIGHT] = base_attachments_[RIGHT];
679 for (int j = 0; dir_ * os[RIGHT][Y_AXIS] <= dir_ * end_ys[RIGHT]; j++)
682 Drul_array<bool> attach_to_stem (false, false);
683 for (LEFT_and_RIGHT (d))
685 os[d][X_AXIS] = base_attachments_[d][X_AXIS];
686 if (extremes_[d].stem_
687 && !Stem::is_invisible (extremes_[d].stem_)
688 && extremes_[d].stem_dir_ == dir_)
690 Interval stem_y = extremes_[d].stem_extent_[Y_AXIS];
691 stem_y.widen (0.25 * staff_space_);
692 if (stem_y.contains (os[d][Y_AXIS]))
694 os[d][X_AXIS] = extremes_[d].stem_extent_[X_AXIS][-d]
696 attach_to_stem[d] = true;
698 else if (dir_ * extremes_[d].stem_extent_[Y_AXIS][dir_]
699 < dir_ * os[d][Y_AXIS]
700 && !extremes_[d].stem_extent_[X_AXIS].is_empty ())
702 os[d][X_AXIS] = extremes_[d].stem_extent_[X_AXIS].center ();
707 dz = os[RIGHT] - os[LEFT];
708 if (dz[X_AXIS] < minimum_length
709 || fabs (dz[Y_AXIS] / dz[X_AXIS]) > parameters_.max_slope_)
711 for (LEFT_and_RIGHT (d))
713 if (extremes_[d].slur_head_
714 && !extremes_[d].slur_head_x_extent_.is_empty ())
716 os[d][X_AXIS] = extremes_[d].slur_head_x_extent_.center ();
717 attach_to_stem[d] = false;
722 dz = os[RIGHT] - os[LEFT];
723 for (LEFT_and_RIGHT (d))
725 if (extremes_[d].slur_head_
726 && !attach_to_stem[d])
728 /* Horizontally move tilted slurs a little. Move
729 more for bigger tilts.
733 -= dir_ * extremes_[d].slur_head_x_extent_.length ()
734 * sin (dz.arg ()) / 3;
738 scores.push_back (Slur_configuration::new_config (os, scores.size ()));
740 os[RIGHT][Y_AXIS] += dir_ * staff_space_ / 2;
743 os[LEFT][Y_AXIS] += dir_ * staff_space_ / 2;
746 assert (scores.size () > 0);
750 vector<Extra_collision_info>
751 Slur_score_state::get_extra_encompass_infos () const
753 extract_grob_set (slur_, "encompass-objects", encompasses);
754 vector<Extra_collision_info> collision_infos;
755 for (vsize i = encompasses.size (); i--;)
757 if (Slur::has_interface (encompasses[i]))
759 Spanner *small_slur = dynamic_cast<Spanner *> (encompasses[i]);
760 Bezier b = Slur::get_curve (small_slur);
762 Offset relative (small_slur->relative_coordinate (common_[X_AXIS], X_AXIS),
763 small_slur->relative_coordinate (common_[Y_AXIS], Y_AXIS));
765 for (int k = 0; k < 3; k++)
767 Direction hdir = Direction (k - 1);
770 Only take bound into account if small slur starts
771 together with big slur.
773 if (hdir && small_slur->get_bound (hdir) != slur_->get_bound (hdir))
776 Offset z = b.curve_point (k / 2.0);
781 yext[dir_] = z[Y_AXIS] + dir_ * thickness_ * 1.0;
783 Interval xext (-1, 1);
784 xext = xext * (thickness_ * 2) + z[X_AXIS];
785 Extra_collision_info info (small_slur,
789 parameters_.extra_object_collision_penalty_);
790 collision_infos.push_back (info);
795 Grob *g = encompasses [i];
796 Interval xe = g->extent (common_[X_AXIS], X_AXIS);
797 Interval ye = g->extent (common_[Y_AXIS], Y_AXIS);
798 if (Dots::has_interface (g))
802 Real penalty = parameters_.extra_object_collision_penalty_;
803 if (Accidental_interface::has_interface (g))
805 penalty = parameters_.accidental_collision_;
807 Rational alt = ly_scm2rational (g->get_property ("alteration"));
808 SCM scm_style = g->get_property ("style");
809 if (!scm_is_symbol (scm_style)
810 && !to_boolean (g->get_property ("parenthesized"))
811 && !to_boolean (g->get_property ("restore-first")))
813 /* End copy accidental.cc */
814 if (alt == FLAT_ALTERATION
815 || alt == DOUBLE_FLAT_ALTERATION)
817 else if (alt == SHARP_ALTERATION)
819 else if (alt == NATURAL_ALTERATION)
824 ye.widen (thickness_ * 0.5);
825 xe.widen (thickness_ * 1.0);
826 Extra_collision_info info (g, xp, xe, ye, penalty);
827 collision_infos.push_back (info);
831 return collision_infos;
834 Extra_collision_info::Extra_collision_info (Grob *g, Real idx, Interval x, Interval y, Real p)
837 extents_[X_AXIS] = x;
838 extents_[Y_AXIS] = y;
841 type_ = g->get_property ("avoid-slur");
844 Extra_collision_info::Extra_collision_info ()