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 = unsmob<Grob> (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 (scm_is_eq (extra_encompass_infos_[i].type_,
285 ly_symbol2scm ("inside"))
286 && minmax (dir_, encompass_place, y_place) == encompass_place
287 && (!extra_encompass_infos_[i].grob_->internal_has_interface (ly_symbol2scm ("key-signature-interface"))
288 && !Clef::has_interface (extra_encompass_infos_[i].grob_)
289 && !extra_encompass_infos_[i].grob_->internal_has_interface (ly_symbol2scm ("time-signature-interface"))))
291 for (LEFT_and_RIGHT (d))
292 additional_ys[d] = minmax (dir_,
295 * (parameters_.encompass_object_range_overshoot_
296 + (y_place - encompass_place)
297 * (normalize (extra_encompass_infos_[i].extents_[X_AXIS].center (),
298 base_attachments_[RIGHT][X_AXIS],
299 base_attachments_[LEFT][X_AXIS])
300 + (dir_ == LEFT ? 0 : -1)))));
304 for (LEFT_and_RIGHT (d))
305 end_ys[d] += additional_ys[d];
307 configurations_ = enumerate_attachments (end_ys);
308 for (vsize i = 0; i < columns_.size (); i++)
309 encompass_infos_.push_back (get_encompass_info (columns_[i]));
314 for (LEFT_and_RIGHT (d))
317 && extremes_[d].slur_head_)
319 * extremes_[d].slur_head_->relative_coordinate (common_[Y_AXIS], Y_AXIS);
323 = (extremes_[LEFT].stem_ && Stem::get_beam (extremes_[LEFT].stem_))
324 || (extremes_[RIGHT].stem_ && Stem::get_beam (extremes_[RIGHT].stem_));
330 MAKE_SCHEME_CALLBACK (Slur, calc_control_points, 1)
332 Slur::calc_control_points (SCM smob)
334 Spanner *me = unsmob<Spanner> (smob);
336 Slur_score_state state;
342 state.generate_curves ();
344 SCM end_ys = me->get_property ("positions");
345 SCM inspect_quants = me->get_property ("inspect-quants");
346 bool debug_slurs = to_boolean (me->layout ()
347 ->lookup_variable (ly_symbol2scm ("debug-slur-scoring")));
349 if (is_number_pair (inspect_quants))
352 end_ys = inspect_quants;
355 Slur_configuration *best = NULL;
356 if (is_number_pair (end_ys))
357 best = state.get_forced_configuration (ly_scm2interval (end_ys));
359 best = state.get_best_curve ();
361 #if DEBUG_SLUR_SCORING
364 string total = best->card ();
365 total += to_string (" TOTAL=%.2f idx=%d", best->score (), best->index_);
366 me->set_property ("annotation", ly_string2scm (total));
370 SCM controls = SCM_EOL;
371 for (int i = 4; i--;)
373 Offset o = best->curve_.control_[i]
374 - Offset (me->relative_coordinate (state.common_[X_AXIS], X_AXIS),
375 me->relative_coordinate (state.common_[Y_AXIS], Y_AXIS));
376 controls = scm_cons (ly_offset2scm (o), controls);
383 Slur_score_state::get_forced_configuration (Interval ys) const
385 Slur_configuration *best = NULL;
387 for (vsize i = 0; i < configurations_.size (); i++)
389 Real d = fabs (configurations_[i]->attachment_[LEFT][Y_AXIS] - ys[LEFT])
390 + fabs (configurations_[i]->attachment_[RIGHT][Y_AXIS] - ys[RIGHT]);
393 best = configurations_[i];
398 while (!best->done ())
399 best->run_next_scorer (*this);
402 programming_error ("cannot find quant");
408 Slur_score_state::get_best_curve () const
410 std::priority_queue < Slur_configuration *, std::vector<Slur_configuration *>,
411 Slur_configuration_less > queue;
412 for (vsize i = 0; i < configurations_.size (); i++)
413 queue.push (configurations_[i]);
415 Slur_configuration *best = NULL;
423 best->run_next_scorer (*this);
431 Slur_score_state::breakable_bound_extent (Direction d) const
433 Grob *col = slur_->get_bound (d)->get_column ();
437 extract_grob_set (slur_, "encompass-objects", extra_encompasses);
439 for (vsize i = 0; i < extra_encompasses.size (); i++)
441 Item *item = dynamic_cast<Item *> (extra_encompasses[i]);
442 if (item && col == item->get_column ())
443 ret.unite (robust_relative_extent (item, common_[X_AXIS], X_AXIS));
450 TODO: should analyse encompasses to determine sensible region, and
451 should limit slopes available.
455 Slur_score_state::get_y_attachment_range () const
457 Drul_array<Real> end_ys;
458 for (LEFT_and_RIGHT (d))
460 if (extremes_[d].note_column_)
462 Interval nc_extent = extremes_[d].note_column_
463 ->extent (common_[Y_AXIS], Y_AXIS);
464 if (nc_extent.is_empty ())
465 slur_->warning ("slur trying to encompass an empty note column.");
468 * max (max (dir_ * (base_attachments_[d][Y_AXIS]
469 + parameters_.region_size_ * dir_),
470 dir_ * (dir_ + nc_extent[dir_])),
471 dir_ * base_attachments_[-d][Y_AXIS]);
474 end_ys[d] = base_attachments_[d][Y_AXIS] + parameters_.region_size_ * dir_;
481 spanner_less (Spanner *s1, Spanner *s2)
484 for (LEFT_and_RIGHT (d))
486 b1[d] = s1->get_bound (d)->get_column ()->get_rank ();
487 b2[d] = s2->get_bound (d)->get_column ()->get_rank ();
490 return b2[LEFT] <= b1[LEFT] && b2[RIGHT] >= b1[RIGHT]
491 && (b2[LEFT] != b1[LEFT] || b2[RIGHT] != b1[RIGHT]);
495 Slur_score_state::get_base_attachments () const
497 Drul_array<Offset> base_attachment;
498 for (LEFT_and_RIGHT (d))
500 Grob *stem = extremes_[d].stem_;
501 Grob *head = extremes_[d].slur_head_;
505 if (extremes_[d].note_column_)
509 fixme: X coord should also be set in this case.
512 && !Stem::is_invisible (stem)
513 && extremes_[d].stem_dir_ == dir_
514 && Stem::get_beaming (stem, -d)
515 && Stem::get_beam (stem)
516 && (!spanner_less (slur_, Stem::get_beam (stem))
518 y = extremes_[d].stem_extent_[Y_AXIS][dir_];
520 y = head->extent (common_[Y_AXIS], Y_AXIS)[dir_];
521 y += dir_ * 0.5 * staff_space_;
523 y = move_away_from_staffline (y, head);
525 Grob *fh = Note_column::first_head (extremes_[d].note_column_);
527 = (fh ? fh->extent (common_[X_AXIS], X_AXIS)
528 : extremes_[d].bound_->extent (common_[X_AXIS], X_AXIS))
529 .linear_combination (CENTER);
531 base_attachment[d] = Offset (x, y);
534 for (LEFT_and_RIGHT (d))
536 if (!extremes_[d].note_column_)
541 Interval ext = breakable_bound_extent (d);
543 ext = Axis_group_interface::
544 generic_bound_extent (extremes_[d].bound_,
545 common_[X_AXIS], X_AXIS);
548 Grob *col = (d == LEFT) ? columns_[0] : columns_.back ();
550 if (extremes_[-d].bound_ != col)
552 y = robust_relative_extent (col, common_[Y_AXIS], Y_AXIS)[dir_];
553 y += dir_ * 0.5 * staff_space_;
555 if (get_grob_direction (col) == dir_
556 && Note_column::get_stem (col)
557 && !Stem::is_invisible (Note_column::get_stem (col)))
558 y -= dir_ * 1.5 * staff_space_;
561 y = base_attachment[-d][Y_AXIS];
563 y = move_away_from_staffline (y, col);
565 base_attachment[d] = Offset (x, y);
569 for (LEFT_and_RIGHT (d))
571 for (int a = X_AXIS; a < NO_AXES; a++)
573 Real &b = base_attachment[d][Axis (a)];
575 if (isinf (b) || isnan (b))
577 programming_error ("slur attachment is inf/nan");
583 return base_attachment;
587 Slur_score_state::move_away_from_staffline (Real y,
588 Grob *on_staff) const
593 Grob *staff_symbol = Staff_symbol_referencer::get_staff_symbol (on_staff);
598 = (y - staff_symbol->relative_coordinate (common_[Y_AXIS],
600 * 2.0 / staff_space_;
602 if (fabs (pos - my_round (pos)) < 0.2
603 && Staff_symbol_referencer::on_staff_line (on_staff, (int) rint (pos)))
604 y += 1.5 * staff_space_ * dir_ / 10;
610 Slur_score_state::generate_avoid_offsets () const
612 vector<Offset> avoid;
613 vector<Grob *> encompasses = columns_;
615 for (vsize i = 0; i < encompasses.size (); i++)
617 if (extremes_[LEFT].note_column_ == encompasses[i]
618 || extremes_[RIGHT].note_column_ == encompasses[i])
621 Encompass_info inf (get_encompass_info (encompasses[i]));
622 Real y = dir_ * (max (dir_ * inf.head_, dir_ * inf.stem_));
624 avoid.push_back (Offset (inf.x_, y + dir_ * parameters_.free_head_distance_));
627 extract_grob_set (slur_, "encompass-objects", extra_encompasses);
628 for (vsize i = 0; i < extra_encompasses.size (); i++)
630 if (Slur::has_interface (extra_encompasses[i]))
632 Grob *small_slur = extra_encompasses[i];
633 Bezier b = Slur::get_curve (small_slur);
635 Offset z = b.curve_point (0.5);
636 z += Offset (small_slur->relative_coordinate (common_[X_AXIS], X_AXIS),
637 small_slur->relative_coordinate (common_[Y_AXIS], Y_AXIS));
639 z[Y_AXIS] += dir_ * parameters_.free_slur_distance_;
642 else if (scm_is_eq (extra_encompasses[i]->get_property ("avoid-slur"),
643 ly_symbol2scm ("inside")))
645 Grob *g = extra_encompasses [i];
646 Interval xe = g->extent (common_[X_AXIS], X_AXIS);
647 Interval ye = g->extent (common_[Y_AXIS], Y_AXIS);
651 avoid.push_back (Offset (xe.center (), ye[dir_]));
658 Slur_score_state::generate_curves () const
660 Real r_0 = robust_scm2double (slur_->get_property ("ratio"), 0.33);
661 Real h_inf = staff_space_ * scm_to_double (slur_->get_property ("height-limit"));
663 vector<Offset> avoid = generate_avoid_offsets ();
664 for (vsize i = 0; i < configurations_.size (); i++)
665 configurations_[i]->generate_curve (*this, r_0, h_inf, avoid);
668 vector<Slur_configuration *>
669 Slur_score_state::enumerate_attachments (Drul_array<Real> end_ys) const
671 vector<Slur_configuration *> scores;
673 Drul_array<Offset> os;
674 os[LEFT] = base_attachments_[LEFT];
675 Real minimum_length = staff_space_
676 * robust_scm2double (slur_->get_property ("minimum-length"), 2.0);
678 for (int i = 0; dir_ * os[LEFT][Y_AXIS] <= dir_ * end_ys[LEFT]; i++)
680 os[RIGHT] = base_attachments_[RIGHT];
681 for (int j = 0; dir_ * os[RIGHT][Y_AXIS] <= dir_ * end_ys[RIGHT]; j++)
684 Drul_array<bool> attach_to_stem (false, false);
685 for (LEFT_and_RIGHT (d))
687 os[d][X_AXIS] = base_attachments_[d][X_AXIS];
688 if (extremes_[d].stem_
689 && !Stem::is_invisible (extremes_[d].stem_)
690 && extremes_[d].stem_dir_ == dir_)
692 Interval stem_y = extremes_[d].stem_extent_[Y_AXIS];
693 stem_y.widen (0.25 * staff_space_);
694 if (stem_y.contains (os[d][Y_AXIS]))
696 os[d][X_AXIS] = extremes_[d].stem_extent_[X_AXIS][-d]
698 attach_to_stem[d] = true;
700 else if (dir_ * extremes_[d].stem_extent_[Y_AXIS][dir_]
701 < dir_ * os[d][Y_AXIS]
702 && !extremes_[d].stem_extent_[X_AXIS].is_empty ())
704 os[d][X_AXIS] = extremes_[d].stem_extent_[X_AXIS].center ();
709 dz = os[RIGHT] - os[LEFT];
710 if (dz[X_AXIS] < minimum_length
711 || fabs (dz[Y_AXIS] / dz[X_AXIS]) > parameters_.max_slope_)
713 for (LEFT_and_RIGHT (d))
715 if (extremes_[d].slur_head_
716 && !extremes_[d].slur_head_x_extent_.is_empty ())
718 os[d][X_AXIS] = extremes_[d].slur_head_x_extent_.center ();
719 attach_to_stem[d] = false;
724 dz = os[RIGHT] - os[LEFT];
725 for (LEFT_and_RIGHT (d))
727 if (extremes_[d].slur_head_
728 && !attach_to_stem[d])
730 /* Horizontally move tilted slurs a little. Move
731 more for bigger tilts.
735 -= dir_ * extremes_[d].slur_head_x_extent_.length ()
736 * sin (dz.arg ()) / 3;
740 scores.push_back (Slur_configuration::new_config (os, scores.size ()));
742 os[RIGHT][Y_AXIS] += dir_ * staff_space_ / 2;
745 os[LEFT][Y_AXIS] += dir_ * staff_space_ / 2;
748 assert (scores.size () > 0);
752 vector<Extra_collision_info>
753 Slur_score_state::get_extra_encompass_infos () const
755 extract_grob_set (slur_, "encompass-objects", encompasses);
756 vector<Extra_collision_info> collision_infos;
757 for (vsize i = encompasses.size (); i--;)
759 if (Slur::has_interface (encompasses[i]))
761 Spanner *small_slur = dynamic_cast<Spanner *> (encompasses[i]);
762 Bezier b = Slur::get_curve (small_slur);
764 Offset relative (small_slur->relative_coordinate (common_[X_AXIS], X_AXIS),
765 small_slur->relative_coordinate (common_[Y_AXIS], Y_AXIS));
767 for (int k = 0; k < 3; k++)
769 Direction hdir = Direction (k - 1);
772 Only take bound into account if small slur starts
773 together with big slur.
775 if (hdir && small_slur->get_bound (hdir) != slur_->get_bound (hdir))
778 Offset z = b.curve_point (k / 2.0);
783 yext[dir_] = z[Y_AXIS] + dir_ * thickness_ * 1.0;
785 Interval xext (-1, 1);
786 xext = xext * (thickness_ * 2) + z[X_AXIS];
787 Extra_collision_info info (small_slur,
791 parameters_.extra_object_collision_penalty_);
792 collision_infos.push_back (info);
797 Grob *g = encompasses [i];
798 Interval xe = g->extent (common_[X_AXIS], X_AXIS);
799 Interval ye = g->extent (common_[Y_AXIS], Y_AXIS);
800 if (Dots::has_interface (g))
804 Real penalty = parameters_.extra_object_collision_penalty_;
805 if (Accidental_interface::has_interface (g))
807 penalty = parameters_.accidental_collision_;
809 Rational alt = ly_scm2rational (g->get_property ("alteration"));
810 SCM scm_style = g->get_property ("style");
811 if (!scm_is_symbol (scm_style)
812 && !to_boolean (g->get_property ("parenthesized"))
813 && !to_boolean (g->get_property ("restore-first")))
815 /* End copy accidental.cc */
816 if (alt == FLAT_ALTERATION
817 || alt == DOUBLE_FLAT_ALTERATION)
819 else if (alt == SHARP_ALTERATION)
821 else if (alt == NATURAL_ALTERATION)
826 ye.widen (thickness_ * 0.5);
827 xe.widen (thickness_ * 1.0);
828 Extra_collision_info info (g, xp, xe, ye, penalty);
829 collision_infos.push_back (info);
833 return collision_infos;
836 Extra_collision_info::Extra_collision_info (Grob *g, Real idx, Interval x, Interval y, Real p)
839 extents_[X_AXIS] = x;
840 extents_[Y_AXIS] = y;
843 type_ = g->get_property ("avoid-slur");
846 Extra_collision_info::Extra_collision_info ()