2 tie-formatting-problem.cc -- implement Tie_formatting_problem6
4 source file of the GNU LilyPond music typesetter
6 (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "tie-formatting-problem.hh"
13 #include "directional-element-interface.hh"
15 #include "libc-extension.hh"
16 #include "note-head.hh"
17 #include "rhythmic-head.hh"
19 #include "staff-symbol-referencer.hh"
21 #include "tie-configuration.hh"
26 Tie_formatting_problem::get_attachment (Real y) const
32 attachments[d] = skyline_height (chord_outlines_[d], y, -d);
34 while (flip (&d) != LEFT);
39 Tie_formatting_problem::Tie_formatting_problem()
44 Tie_formatting_problem::~Tie_formatting_problem ()
46 for (Tie_configuration_map::const_iterator i (possibilities_.begin ());
47 i != possibilities_.end (); i++)
52 Tie_formatting_problem::set_chord_outline (Link_array<Item> bounds,
55 Real staff_space = Staff_symbol_referencer::staff_space (bounds[0]);
60 for (int i = 0; i < bounds.size (); i++)
62 Grob *head = bounds[i];
63 if (!Note_head::has_interface (head))
67 stem = unsmob_grob (head->get_object ("stem"));
69 Real p = Staff_symbol_referencer::get_position (head);
70 Interval y ((p-1) * 0.5 * staff_space,
71 (p+1) * 0.5 * staff_space);
73 Interval x = head->extent (x_refpoint_, X_AXIS);
74 boxes.push (Box (x, y));
76 Grob *dots = Rhythmic_head::get_dots (head);
77 if (d == LEFT && dots)
79 Interval x = dots->extent (x_refpoint_, X_AXIS);
80 Interval y (-0.5, 0.5);
81 int p = int (Staff_symbol_referencer::get_position (dots));
84 dot_positions_.insert (p);
87 y *= staff_space * 0.5;
88 // boxes.push (Box (x, y));
92 chord_outlines_[d] = empty_skyline (-d);
94 if (bounds[0]->break_status_dir ())
96 Real x = robust_relative_extent (bounds[0], x_refpoint_, X_AXIS)[-d];
97 chord_outlines_[d].elem_ref (0).height_ = x;
100 for (int i = 0; i < boxes.size (); i++)
101 insert_extent_into_skyline (&chord_outlines_[d] ,
102 boxes[i], Y_AXIS, -d);
105 && !Stem::is_invisible (stem))
108 x.add_point (stem->relative_coordinate (x_refpoint_, X_AXIS));
109 x.widen (staff_space / 20); // ugh.
111 y.add_point (Stem::stem_end_position (stem) * staff_space * .5);
113 Direction stemdir = get_grob_direction (stem);
114 y.add_point (Stem::head_positions (stem)[-stemdir]
117 insert_extent_into_skyline (&chord_outlines_[d], Box (x,y), Y_AXIS, -d);
123 Box flag_box = Stem::get_translated_flag (stem).extent_box ();
124 flag_box.translate( Offset (x[RIGHT], X_AXIS));
125 insert_extent_into_skyline (&chord_outlines_[d], flag_box,
130 Direction updowndir = DOWN;
137 Box b = boxes.boundary (updowndir, 0);
139 x[-d] = b[X_AXIS].linear_combination (-d / 2);
140 y[-updowndir] = b[Y_AXIS][updowndir];
141 y[updowndir] = updowndir * infinity_f;
145 insert_extent_into_skyline (&chord_outlines_[d],
149 while (flip (&updowndir) != DOWN);
154 Tie_formatting_problem::from_tie (Grob *tie)
156 Link_array<Grob> ties;
161 details_.from_grob (tie);
165 Tie_formatting_problem::common_x_refpoint () const
171 Tie_formatting_problem::from_ties (Link_array<Grob> const &ties)
173 if (ties.is_empty ())
176 x_refpoint_ = ties[0];
177 for (int i = 0; i < ties.size (); i++)
179 x_refpoint_ = dynamic_cast<Spanner*> (ties[i])->get_bound (LEFT)->common_refpoint (x_refpoint_, X_AXIS);
180 x_refpoint_ = dynamic_cast<Spanner*> (ties[i])->get_bound (RIGHT)->common_refpoint (x_refpoint_, X_AXIS);
183 details_.from_grob (ties[0]);
188 Link_array<Item> bounds;
190 for (int i = 0; i < ties.size (); i++)
192 Item *it = dynamic_cast<Spanner*> (ties[i])->get_bound (d);
197 set_chord_outline (bounds, d);
199 while (flip (&d) != LEFT);
202 for (int i = 0; i < ties.size (); i++)
204 Tie_specification spec;
206 if (scm_is_number (ties[i]->get_property_data (ly_symbol2scm ("direction"))))
208 spec.manual_dir_ = to_dir (ties[i]->get_property ("direction"));
209 spec.has_manual_dir_ = true;
212 spec.position_ = Tie::get_position (ties[i]);
214 specifications_.push (spec);
219 Tie_formatting_problem::from_lv_ties (Link_array<Grob> const &lv_ties)
221 if (lv_ties.is_empty ())
224 details_.from_grob (lv_ties[0]);
225 Link_array<Item> heads;
227 for (int i = 0; i < lv_ties.size (); i++)
229 Tie_specification spec;
230 Item *head = unsmob_item (lv_ties[i]->get_object ("note-head"));
233 programming_error ("LV tie without head?!");
237 spec.position_ = int (Staff_symbol_referencer::get_position (head));
241 specifications_.push (spec);
244 x_refpoint_ = lv_ties [0];
245 for (int i = 0; i < lv_ties.size (); i++)
247 x_refpoint_ = lv_ties[i]->common_refpoint (x_refpoint_, X_AXIS);
250 set_chord_outline (heads, LEFT);
252 Real right_most = - infinity_f;
254 for (int i = 0; i < chord_outlines_[LEFT].size (); i++)
256 right_most = max (right_most, chord_outlines_[LEFT][i].height_);
259 Skyline_entry right_entry;
260 right_entry.width_.set_full ();
261 right_entry.height_ = right_most + 1.5;
263 chord_outlines_[RIGHT].push (right_entry);
267 Tie_formatting_problem::get_configuration (int pos, Direction dir)
269 pair<int,int> key (pos, dir);
270 Tie_configuration_map::const_iterator f = possibilities_.find (key);
272 if (f != possibilities_.end ())
278 Tie_configuration *conf = generate_configuration (pos,dir);
279 possibilities_[key] = conf;
284 Tie_formatting_problem::generate_configuration (int pos, Direction dir) const
286 Tie_configuration *conf = new Tie_configuration;
287 conf->position_ = pos;
289 Real y = conf->position_ * 0.5 * details_.staff_space_;
291 if (dot_positions_.find (pos) != dot_positions_.end ())
293 conf->delta_y_ += 0.25 * details_.staff_space_;
296 conf->attachment_x_ = get_attachment (y + conf->delta_y_);
298 Real h = conf->height (details_);
301 if (h < 0.5 * details_.staff_space_
302 && !Staff_symbol_referencer::on_staffline (details_.staff_symbol_referencer_, pos))
304 conf->center_tie_vertically (details_);
306 else if (h < 0.5 * details_.staff_space_
307 && Staff_symbol_referencer::on_staffline (details_.staff_symbol_referencer_, pos))
309 conf->delta_y_ += dir * 0.2 * details_.staff_space_;
313 conf->attachment_x_.widen ( - details_.x_gap_);
318 Tie_formatting_problem::score_aptitude (Tie_configuration const &conf,
319 int tie_position) const
321 Real wrong_direction_offset_penalty_;
322 Real distance_penalty_factor_;
324 wrong_direction_offset_penalty_ = 10;
325 distance_penalty_factor_ = 5;
328 Real curve_y = conf.position_ * details_.staff_space_ * 0.5 + conf.delta_y_;
329 Real tie_y = tie_position * details_.staff_space_ * 0.5;
330 if (sign (curve_y - tie_y) != conf.dir_)
331 penalty += wrong_direction_offset_penalty_;
333 penalty += distance_penalty_factor_ * fabs (curve_y - tie_y);
339 Tie_formatting_problem::score_configuration (Tie_configuration const &conf) const
341 Real length_penalty_factor = 1.0;
342 Real min_length = 0.333;
343 Real staff_line_clearance = 0.1;
344 Real staff_line_collision_penalty = 5;
345 Real dot_collision_clearance = 0.25;
346 Real dot_collision_penalty = 10;
350 Real length = conf.attachment_x_.length ();
351 if (length < min_length)
352 penalty += length_penalty_factor / max (0.01, length);
354 Real tip_pos = conf.position_ + conf.delta_y_ / 0.5 * details_.staff_space_;
355 Real tip_y = tip_pos * details_.staff_space_ * 0.5;
356 Real height = conf.height (details_);
358 Real top_y = tip_y + conf.dir_ * height;
359 Real top_pos = 2 * top_y / details_.staff_space_;
360 Real round_top_pos = rint (top_pos);
361 if (fabs (top_pos - round_top_pos) < staff_line_clearance
362 && Staff_symbol_referencer::on_staffline (details_.staff_symbol_referencer_,
364 && Staff_symbol_referencer::staff_radius (details_.staff_symbol_referencer_) > top_y)
366 penalty += staff_line_collision_penalty;
369 if (fabs (tip_pos - rint (tip_pos)) < staff_line_clearance
370 && Staff_symbol_referencer::on_staffline (details_.staff_symbol_referencer_,
371 int (rint (tip_pos))))
373 penalty += staff_line_collision_penalty;
376 if (!dot_x_.is_empty ())
379 Real x = dot_x_.center ();
381 Bezier b = conf.get_transformed_bezier (details_);
382 if (b.control_point_extent (X_AXIS).contains (x))
384 Real y = b.get_other_coordinate (X_AXIS, x);
386 for (set<int>::const_iterator i (dot_positions_.begin ());
387 i != dot_positions_.end (); i ++)
390 if (fabs (dot_pos * details_.staff_space_ * 0.5 - y) < dot_collision_clearance)
392 penalty += dot_collision_penalty;
402 Tie_formatting_problem::find_optimal_tie_configuration (int pos, Direction dir) const
404 Link_array<Tie_configuration> confs;
407 for (int i = 0; i < region_size; i ++)
409 confs.push (generate_configuration (pos + i * dir, dir));
415 Real best_score = 1e6;
416 for (int i = 0; i < confs.size (); i ++)
419 score += score_configuration (*confs[i]);
420 score += score_aptitude (*confs[i], pos);
422 if (score < best_score)
429 Tie_configuration best = *confs[best_idx];
430 for (int i = 0; i < confs.size (); i++)
436 Tie_specification::Tie_specification ()
438 has_manual_position_ = false;
439 has_manual_dir_ = false;
441 manual_position_ = 0;
442 manual_dir_ = CENTER;
447 Tie_formatting_problem::score_ties_aptitude (Ties_configuration const &ties) const
450 if (ties.size () != specifications_.size ())
452 programming_error ("Huh? Mismatch between sizes.");
456 for (int i = 0; i < ties.size (); i++)
457 score += score_aptitude (ties[i], specifications_[i].position_);
463 Tie_formatting_problem::score_ties (Ties_configuration const &ties) const
465 return score_ties_configuration (ties)
466 + score_ties_aptitude (ties);
470 Tie_formatting_problem::score_ties_configuration (Ties_configuration const &ties) const
472 const Real tie_monotonicity_penalty = 100;
473 const Real tie_collision_penalty = 30;
474 const Real tie_collision_distance = 0.25;
477 for (int i = 0; i < ties.size (); i++)
479 score += score_configuration (ties[i]);
483 Real last_edge = 0.0;
484 Real last_center = 0.0;
485 for (int i = 0; i < ties.size (); i++)
487 Bezier b (ties[i].get_transformed_bezier (details_));
489 Real center = b.curve_point (0.5)[Y_AXIS];
490 Real edge = b.curve_point (0.0)[Y_AXIS];
494 if (edge <= last_edge)
495 score += tie_monotonicity_penalty;
496 if (center <= last_center)
497 score += tie_monotonicity_penalty;
500 tie_collision_penalty
501 * max (tie_collision_distance - fabs (center - last_center), 0.0) / tie_collision_distance;
503 tie_collision_penalty
504 * max (tie_collision_distance - fabs (edge - last_edge), 0.0) / tie_collision_distance;
508 last_center = center;
515 Generate with correct X-attachments and beziers, copying delta_y_
516 from TIES_CONFIG if necessary.
519 Tie_formatting_problem::generate_ties_configuration (Ties_configuration const &ties_config)
521 Ties_configuration copy;
522 for (int i = 0; i < ties_config.size (); i++)
524 Tie_configuration * ptr = get_configuration (ties_config[i].position_, ties_config[i].dir_);
525 if (specifications_[i].has_manual_position_)
528 = (specifications_[i].manual_position_ - ties_config[i].position_)
529 * 0.5 * details_.staff_space_;
538 Tie_formatting_problem::generate_base_chord_configuration ()
540 Ties_configuration ties_config;
543 for (int i = 0; i < specifications_.size (); i ++)
545 Tie_configuration conf;
546 if (specifications_[i].has_manual_dir_)
547 conf.dir_ = specifications_[i].manual_dir_;
548 if (specifications_[i].has_manual_position_)
550 conf.position_ = (int) my_round (specifications_[i].manual_position_);
551 conf.delta_y_ = (specifications_[i].manual_position_ - conf.position_)
552 * 0.5 * details_.staff_space_;
555 conf.position_ = specifications_[i].position_;
557 ties_config.push (conf);
560 set_ties_config_standard_directions (&ties_config);
562 ties_config = generate_ties_configuration (ties_config);
568 Tie_formatting_problem::generate_optimal_chord_configuration ()
570 Ties_configuration base = generate_base_chord_configuration ();
571 Array<Tie_configuration_variation> vars = get_variations (base);
573 Ties_configuration best = base;
574 Real best_score = score_ties_configuration (best);
577 This simply is 1-opt: we have K substitions, and we try applying
578 exactly every one for each.
580 for (int i = 0; i < vars.size (); i++)
582 Ties_configuration variant = base;
583 variant[vars[i].index_] = *vars[i].suggestion_;
585 Real score = (score_ties_configuration (variant)
586 + score_ties_aptitude (variant));
587 if (score < best_score)
598 Tie_formatting_problem::set_ties_config_standard_directions (Ties_configuration *tie_configs)
600 if (tie_configs->is_empty ())
603 if (!tie_configs->elem (0).dir_)
604 tie_configs->elem_ref (0).dir_ = DOWN;
605 if (!tie_configs->top().dir_)
606 tie_configs->top().dir_ = UP;
611 for (int i = 1; i < tie_configs->size (); i++)
613 Real diff = (tie_configs->elem (i-1).position_
614 - tie_configs->elem (i).position_);
616 if (fabs (diff) <= 1)
618 if (!tie_configs->elem (i-1).dir_)
619 tie_configs->elem_ref (i-1).dir_ = DOWN;
620 if (!tie_configs->elem (i).dir_)
621 tie_configs->elem_ref (i).dir_ = UP;
625 for (int i = 1; i < tie_configs->size() - 1; i++)
627 Tie_configuration &conf = tie_configs->elem_ref (i);
631 Direction position_dir =
632 Direction (sign (conf.position_));
636 conf.dir_ = position_dir;
640 Tie_configuration_variation::Tie_configuration_variation ()
646 Array<Tie_configuration_variation>
647 Tie_formatting_problem::get_variations (Ties_configuration const &ties)
649 Real center_distance_tolerance = 0.25;
651 Array<Tie_configuration_variation> vars;
652 Real last_center = 0.0;
653 for (int i = 0; i < ties.size (); i++)
655 Bezier b (ties[i].get_transformed_bezier (details_));
657 Real center = b.curve_point (0.5)[Y_AXIS];
661 if (center <= last_center + center_distance_tolerance)
663 if (!specifications_[i].has_manual_dir_)
665 Tie_configuration_variation var;
667 var.suggestion_ = get_configuration (ties[i].position_,
673 if (!specifications_[i-1].has_manual_dir_)
675 Tie_configuration_variation var;
677 var.suggestion_ = get_configuration (ties[i-1].position_,
685 last_center = center;
693 Tie_formatting_problem::set_manual_tie_configuration (SCM manual_configs)
696 for (SCM s = manual_configs;
697 scm_is_pair (s) && k < specifications_.size(); s = scm_cdr (s))
699 SCM entry = scm_car (s);
700 if (!scm_is_pair (entry))
703 Tie_specification &spec = specifications_[k];
705 if (scm_is_number (scm_cdr (entry)))
707 spec.has_manual_dir_ = true;
708 spec.manual_dir_ = Direction (scm_to_int (scm_cdr (entry)));
710 if (scm_is_number (scm_car (entry)))
712 spec.has_manual_position_ = true;
713 spec.manual_position_ = scm_to_double (scm_car (entry));