2 stem-info.cc -- implement Stem_info
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1998 Jan Nieuwenhuizen <janneke@gnu.org>
15 #include "paper-def.hh"
17 #include "stem-info.hh"
20 Stem_info::Stem_info ()
24 Stem_info::Stem_info (Stem*s)
27 x_ = stem_l_->hpos_f ();
29 beam_dir_ = stem_l_->beam_dir_;
30 mult_i_ = stem_l_->mult_i_;
33 Paper_def* paper_l = stem_l_->paper ();
34 Real internote_f = paper_l->internote_f ();
35 Real interbeam_f = paper_l->interbeam_f (mult_i_);
36 Real beam_f = paper_l->beam_thickness_f ();
40 DOUT << "******" << i++ << "******\n"
41 << "begin_f: " << stem_l_->stem_begin_f () * dir_
42 << "\nchord_f/i: " << stem_l_->chord_start_f () * dir_ / internote_f << '\n';
45 // strangely enough, dim(chord_start_f) == pt (and not internote!)
46 idealy_f_ = stem_l_->chord_start_f () / internote_f;
48 // calculate using dim(y) == pt
49 idealy_f_ *= internote_f;
51 // for simplicity, we calculate as if dir == UP
52 idealy_f_ *= beam_dir_;
54 int stem_max = (int)rint(paper_l->get_var ("stem_max"));
55 Real min_stem_f = paper_l->get_var (String ("minimum_stem_length")
56 + to_str (mult_i_ <? stem_max));
57 Real stem_f = paper_l->get_var (String ("stem_length")
58 + to_str (mult_i_ <? stem_max));
60 if (!beam_dir_ || (beam_dir_ == dir_))
61 /* normal beamed stem */
66 idealy_f_ += (mult_i_ - 1) * interbeam_f;
72 miny_f_ += min_stem_f;
74 // lowest beam of (UP) beam must never be lower than second staffline
75 miny_f_ = miny_f_ >? (- 2 * internote_f - beam_f
76 + (mult_i_ > 0) * beam_f + interbeam_f * (mult_i_ - 1));
82 // idealy_f_ -= (mult_i_ - 1) * interbeam_f;
83 // idealy_f_ += (mult_i_ - stem_l_->flag_i_ >? 0) * interbeam_f;
88 maxy_f_ -= min_stem_f;
91 // set dim(y) == internote
92 idealy_f_ /= internote_f;
93 miny_f_ /= internote_f;
94 maxy_f_ /= internote_f;
96 DOUT << "dir_: " << dir_ << '\n';
97 DOUT << "mult_i_: " << mult_i_ << '\n';
98 DOUT << "idealy_f_: " << idealy_f_ << '\n';
99 DOUT << "miny_f_: " << miny_f_ << '\n';
100 DOUT << "maxy_f_: " << maxy_f_ << '\n';
102 idealy_f_ = maxy_f_ <? idealy_f_;
103 idealy_f_ = miny_f_ >? idealy_f_;
106 Beam* beam_l_ = stem_l_->beam_l_;
107 if (beam_l_->sinfo_.size ()
108 && stem_l_->staff_sym_l_ != beam_l_->sinfo_[0].stem_l_->staff_sym_l_)
110 // hmm, perhaps silly now to have vertical_align in Beam
111 interstaff_f_ = beam_l_->vertical_align_f_ / internote_f;
112 // urg, guess staff order:
113 // if our stem ends higher, our staff is probably lower...
114 if (idealy_f_ * beam_dir_ > beam_l_->sinfo_[0].idealy_f_ * beam_dir_)
116 idealy_f_ += interstaff_f_ * beam_dir_;
117 miny_f_ += interstaff_f_ * beam_dir_;
118 maxy_f_ += interstaff_f_ * beam_dir_;