2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1996--2010 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/>.
24 #include "grob-interface.hh"
25 #include "std-vector.hh"
26 #include "lily-proto.hh"
27 #include "stem-info.hh"
30 TODO: move quanting in separate file.
32 struct Beam_quant_parameters
34 Real SECONDARY_BEAM_DEMERIT;
35 Real STEM_LENGTH_DEMERIT_FACTOR;
39 threshold to combat rounding errors.
43 // possibly ridiculous, but too short stems just won't do
44 Real STEM_LENGTH_LIMIT_PENALTY;
45 Real DAMPING_DIRECTION_PENALTY;
46 Real MUSICAL_DIRECTION_FACTOR;
47 Real HINT_DIRECTION_PENALTY;
48 Real IDEAL_SLOPE_FACTOR;
49 Real ROUND_TO_ZERO_SLOPE;
51 void fill (Grob *him);
61 struct Beam_stem_segment
77 bool operator <(Beam_stem_segment const &a, Beam_stem_segment const &b);
82 static int normal_stem_count (Grob *);
83 static Grob *first_normal_stem (Grob *);
84 static Grob *last_normal_stem (Grob *);
85 DECLARE_GROB_INTERFACE();
86 static void add_stem (Grob *, Grob *);
87 static bool is_cross_staff (Grob *);
88 static bool is_knee (Grob *);
89 static void set_beaming (Grob *, Beaming_pattern const *);
90 static void set_stemlens (Grob *);
91 static int get_beam_count (Grob *me);
92 static Real get_beam_translation (Grob *me);
93 static Real get_beam_thickness (Grob *me);
94 static void connect_beams (Grob *me);
95 static vector<Beam_segment> get_beam_segments (Grob *me_grob, Grob **common);
96 static Interval no_visible_stem_positions (Grob *me, Interval default_value);
98 DECLARE_SCHEME_CALLBACK (rest_collision_callback, (SCM element, SCM prev_off));
99 DECLARE_SCHEME_CALLBACK (print, (SCM));
100 DECLARE_SCHEME_CALLBACK (calc_beaming, (SCM));
101 DECLARE_SCHEME_CALLBACK (calc_stem_shorten, (SCM));
102 DECLARE_SCHEME_CALLBACK (calc_direction, (SCM));
103 DECLARE_SCHEME_CALLBACK (calc_positions, (SCM));
104 DECLARE_SCHEME_CALLBACK (calc_least_squares_positions, (SCM, SCM));
105 DECLARE_SCHEME_CALLBACK (calc_normal_stems, (SCM));
106 DECLARE_SCHEME_CALLBACK (calc_concaveness, (SCM));
107 DECLARE_SCHEME_CALLBACK (set_stem_lengths, (SCM));
108 DECLARE_SCHEME_CALLBACK (calc_cross_staff, (SCM));
110 /* position callbacks */
111 DECLARE_SCHEME_CALLBACK (shift_region_to_valid, (SCM, SCM));
112 DECLARE_SCHEME_CALLBACK (slope_damping, (SCM, SCM));
113 DECLARE_SCHEME_CALLBACK (quanting, (SCM, SCM));
115 static Real score_slopes_dy (Real, Real, Real, Real, Real, bool, Beam_quant_parameters const *);
117 static Real score_stem_lengths (vector<Grob*> const &stems,
118 vector<Stem_info> const &stem_infos,
119 vector<Real> const &base_stem_ys,
120 vector<Real> const &stem_xs,
123 Real yl, Real yr, Beam_quant_parameters const *);
124 static Real score_forbidden_quants (Real, Real,
125 Real, Real, Real, Real,
126 Drul_array<int>, Direction, Direction,
127 Beam_quant_parameters const *);
129 static int get_direction_beam_count (Grob *me, Direction d);
131 static Direction get_default_dir (Grob *);
132 static void set_stem_directions (Grob *, Direction);
133 static void consider_auto_knees (Grob *);
134 static void set_stem_shorten (Grob *);
135 static Real calc_stem_y (Grob *, Grob *s, Grob **c,
136 Real, Real, Direction,
137 Drul_array<Real> pos, bool french);
138 static int forced_stem_count (Grob *);