#include "abbreviation-beam.hh"
#include "misc.hh"
#include "debug.hh"
-#include "atom.hh"
+
#include "molecule.hh"
#include "leastsquares.hh"
#include "stem.hh"
#include "paper-def.hh"
#include "lookup.hh"
-#include "grouping.hh"
-#include "stem-info.hh"
-
-
-
+#include "rhythmic-grouping.hh"
Beam::Beam ()
{
slope_f_ = 0;
- solved_slope_f_ = 0;
left_y_ = 0;
damping_i_ = 1;
quantisation_ = NORMAL;
multiple_i_ = 0;
+ vertical_align_drul_[MIN] = 0;
+ vertical_align_drul_[MAX] = -1;
}
void
}
Molecule*
-Beam::brew_molecule_p () const
+Beam::do_brew_molecule_p () const
{
Molecule *mol_p = new Molecule;
-
Real internote_f = paper ()->internote_f ();
Real x0 = stems_[0]->hpos_f ();
mol_p->translate_axis (x0
- spanned_drul_[LEFT]->absolute_coordinate (X_AXIS), X_AXIS);
+ // correct if last note (and therefore reference point of beam)
+ // is on different staff
+ mol_p->translate_axis (- sinfo_.top ().interstaff_f_ * internote_f, Y_AXIS);
+
return mol_p;
}
Offset
Beam::center () const
{
- Real w= (paper ()->note_width () + width ().length ())/2.0;
+ Real w= (paper ()->note_width () + extent (X_AXIS).length ())/2.0;
return Offset (w, (left_y_ + w* slope_f_)*paper ()->internote_f ());
}
transparent_b_ = true;
return ;
}
- solve_slope ();
+ calculate_slope ();
set_stemlens ();
}
} while (flip(&d) != DOWN);
- do {
- if (!total[d])
- count[d] = 1;
- } while (flip(&d) != DOWN);
-
/*
[Ross] states that the majority of the notes dictates the
direction (and not the mean of "center distance")
/*
See Documentation/tex/fonts.doc
*/
+
void
Beam::solve_slope ()
{
/*
should use minimum energy formulation (cf linespacing)
*/
-
- assert (multiple_i_);
- Array<Stem_info> sinfo;
+ assert (sinfo_.size () > 1);
DOUT << "Beam::solve_slope: \n";
- for (int j=0; j <stems_.size (); j++)
- {
- Stem *i = stems_[j];
-
- i->mult_i_ = multiple_i_;
- i->set_default_extents ();
- if (i->invisible_b ())
- continue;
- Stem_info info (i);
- sinfo.push (info);
- }
- if (! sinfo.size ())
- slope_f_ = left_y_ = 0;
- else if (sinfo.size () == 1)
+ Least_squares l;
+ for (int i=0; i < sinfo_.size (); i++)
{
- slope_f_ = 0;
- left_y_ = sinfo[0].idealy_f_;
+ l.input.push (Offset (sinfo_[i].x_, sinfo_[i].idealy_f_));
}
- else
+ l.minimise (slope_f_, left_y_);
+}
+
+Real
+Beam::check_stemlengths_f (bool set_b)
+{
+ Real interbeam_f = paper ()->interbeam_f (multiple_i_);
+ Real internote_f = paper ()->internote_f ();
+ Real beam_f = paper ()->beam_thickness_f ();
+ Real staffline_f = paper ()->rule_thickness ();
+ Real epsilon_f = staffline_f / 8;
+ Real dy_f = 0.0;
+ for (int i=0; i < sinfo_.size (); i++)
{
- Real leftx = sinfo[0].x_;
- Least_squares l;
- for (int i=0; i < sinfo.size (); i++)
+ Real y = sinfo_[i].x_ * slope_f_ + left_y_;
+
+ // correct for knee
+ if (dir_ != sinfo_[i].dir_)
{
- sinfo[i].x_ -= leftx;
- l.input.push (Offset (sinfo[i].x_, sinfo[i].idealy_f_));
+ y -= dir_ * (beam_f / 2
+ + (sinfo_[i].mult_i_ - 1) * interbeam_f) / internote_f;
+ if (!i && sinfo_[i].stem_l_->staff_sym_l_ !=
+ sinfo_.top ().stem_l_->staff_sym_l_)
+ y += dir_ * (multiple_i_ - (sinfo_[i].stem_l_->flag_i_ - 2) >? 0)
+ * interbeam_f / internote_f;
}
- l.minimise (slope_f_, left_y_);
-
- }
-
- solved_slope_f_ = dir_ * slope_f_;
-
- /*
- This neat trick is by Werner Lemberg, damped = tanh (slope_f_) corresponds
- with some tables in [Wanske]
- */
- if (damping_i_)
- slope_f_ = 0.6 * tanh (slope_f_) / damping_i_;
-
- /*
- [TODO]
- think
-
- dropping lq for stemlengths solves [d d d] [d g d] "bug..."
+ if (set_b)
+ sinfo_[i].stem_l_->set_stemend (y - sinfo_[i].interstaff_f_);
+
+ y *= dir_;
+ if (y > sinfo_[i].maxy_f_)
+ dy_f = dy_f <? sinfo_[i].maxy_f_ - y;
+ if (y < sinfo_[i].miny_f_)
+ {
+ // when all too short, normal stems win..
+ if (dy_f < -epsilon_f)
+ warning (_ ("weird beam shift, check your knees"));
+ dy_f = dy_f >? sinfo_[i].miny_f_ - y;
+ }
+ }
+ return dy_f;
+}
- but may be a bit too crude, and result in lots of
- too high beams...
+void
+Beam::set_steminfo ()
+{
+ assert (multiple_i_);
+ int total_count_i = 0;
+ int forced_count_i = 0;
+ for (int i=0; i < stems_.size (); i++)
+ {
+ Stem *s = stems_[i];
+ s->mult_i_ = multiple_i_;
+ s->set_default_extents ();
+ if (s->invisible_b ())
+ continue;
+ if (((int)s->chord_start_f ()) && (s->dir_ != s->get_default_dir ()))
+ forced_count_i++;
+ total_count_i++;
+ }
- perhaps only if slope = 0 ?
- */
+ Real internote_f = paper ()->internote_f ();
+ int stem_max = (int)rint(paper ()->get_var ("stem_max"));
+ Real shorten_f = paper ()->get_var (String ("forced_stem_shorten"
+ + to_str (multiple_i_ <? stem_max)))
+ / internote_f;
+
+ Real leftx = 0;
+ for (int i=0; i < stems_.size (); i++)
+ {
+ Stem *s = stems_[i];
+ if (s->invisible_b ())
+ continue;
-// left_y_ = sinfo[0].minyf_;
+ Stem_info info (s);
+ if (leftx == 0)
+ leftx = info.x_;
+ info.x_ -= leftx;
+ if (info.dir_ == dir_)
+ {
+ if (forced_count_i == total_count_i)
+ info.idealy_f_ -= shorten_f;
+ else if (forced_count_i > total_count_i / 2)
+ info.idealy_f_ -= shorten_f / 2;
+ }
+ sinfo_.push (info);
+ }
+}
- if (sinfo.size () >= 1)
+void
+Beam::calculate_slope ()
+{
+ set_steminfo ();
+ if (!sinfo_.size ())
+ slope_f_ = left_y_ = 0;
+ else if (sinfo_[0].idealy_f_ == sinfo_.top ().idealy_f_)
{
- Real staffline_f = paper ()->rule_thickness ();
- Real epsilon_f = staffline_f / 8;
- if (abs (slope_f_) < epsilon_f)
- left_y_ = (sinfo[0].idealy_f_ + sinfo.top ().idealy_f_) / 2;
- else
- /*
- symmetrical, but results often in having stemlength = minimal
-
- left_y_ = sinfo[0].dir_ == dir_ ? sinfo[0].miny_f_ : sinfo[0].maxy_f_;
+ slope_f_ = 0;
+ left_y_ = sinfo_[0].idealy_f_;
+ left_y_ *= dir_;
+ }
+ else
+ {
+ solve_slope ();
+ Real solved_slope_f = slope_f_;
- what about
- */
+ /*
+ steep slope running against lengthened stem is suspect
+ */
+ Real dx_f = stems_.top ()->hpos_f () - stems_[0]->hpos_f ();
+
+ // urg, these y internote-y-dimensions
+ Real internote_f = paper ()->internote_f ();
+ Real lengthened = paper ()->get_var ("beam_lengthened") / internote_f;
+ Real steep = paper ()->get_var ("beam_steep_slope") / internote_f;
+ if (((left_y_ - sinfo_[0].idealy_f_ > lengthened)
+ && (slope_f_ > steep))
+ || ((left_y_ + slope_f_ * dx_f - sinfo_.top ().idealy_f_ > lengthened)
+ && (slope_f_ < -steep)))
{
- Real dx = stems_.top ()->hpos_f () - stems_[0]->hpos_f ();
- if (sinfo[0].dir_ == sinfo.top ().dir_)
- left_y_ = sinfo[0].idealy_f_ >? sinfo.top ().idealy_f_ - slope_f_ * dx;
- // knee
- else
- left_y_ = sinfo[0].idealy_f_;
+ slope_f_ = 0;
}
- }
- // uh?
- Real dy = 0.0;
- for (int i=0; i < sinfo.size (); i++)
- {
- Real y = sinfo[i].x_ * slope_f_ + left_y_;
- Real my = sinfo[i].miny_f_;
+ /*
+ This neat trick is by Werner Lemberg,
+ damped = tanh (slope_f_)
+ corresponds with some tables in [Wanske]
+ */
+ if (damping_i_)
+ slope_f_ = 0.6 * tanh (slope_f_) / damping_i_;
+
+ quantise_dy ();
- if (my - y > dy)
- dy = my -y;
- }
- left_y_ += dy;
- left_y_ *= dir_;
- slope_f_ *= dir_;
+ Real damped_slope_dy_f = (solved_slope_f - slope_f_) * dx_f / 2;
+ left_y_ += damped_slope_dy_f;
- quantise_dy ();
+ left_y_ *= dir_;
+ slope_f_ *= dir_;
+ }
}
void
if (test_pos == 0)
{
allowed_position.push (hang);
- cout << "hang" << hang << endl;
+ cout << "hang" << hang << "\n";
}
else if (test_pos==1)
{
}
}
-#if 0
- // this currently never happens
- Real q = (dy_f / interline_f - dy_i) * interline_f;
- if ((quantisation_ < NORMAL) && (q < interline_f / 3 - beam_f / 2))
- allowed_position.push (inter);
-#endif
-
Interval iv = quantise_iv (allowed_position, interline_f, dy_f);
Real quanty_f = dy_f - iv.min () <= iv.max () - dy_f ? iv.min () : iv.max ();
Beam::set_stemlens ()
{
Real staffline_f = paper ()->rule_thickness ();
- Real interbeam_f = paper ()->interbeam_f (multiple_i_);
- Real internote_f = paper ()->internote_f ();
- Real beam_f = paper ()->beam_thickness_f ();
-
// enge floots
Real epsilon_f = staffline_f / 8;
- /*
-
- Damped and quantised slopes, esp. in monotone scales such as
-
- [c d e f g a b c]
-
- will soon produce the minimal stem-length for one of the extreme
- stems, which is wrong (and ugly). The minimum stemlength should
- be kept rather small, in order to handle extreme beaming, such as
-
- [c c' 'c] %assuming no knee
-
- correctly.
- To avoid these short stems for normal cases, we'll correct for
- the loss in slope, if necessary.
-
- [TODO]
- ugh, another hack. who's next?
- Writing this all down, i realise (at last) that the Right Thing to
- do is to assign uglyness to slope and stem-lengths and then minimise
- the total uglyness of a beam.
- Steep slopes are ugly, shortened stems are ugly, lengthened stems
- are ugly.
- How to do this?
-
- */
-
- Real dx_f = stems_.top ()->hpos_f () - stems_[0]->hpos_f ();
- Real damp_correct_f = paper ()->get_var ("beam_slope_damp_correct_factor");
- Real damped_slope_dy_f = (solved_slope_f_ - slope_f_) * dx_f
- * sign (slope_f_);
- damped_slope_dy_f *= damp_correct_f;
- if (damped_slope_dy_f <= epsilon_f)
- damped_slope_dy_f = 0;
-
DOUT << "Beam::set_stemlens: \n";
- Real x0 = stems_[0]->hpos_f ();
- Real dy_f = 0;
- // urg
- for (int jj = 0; jj < 10; jj++)
+ Real dy_f = check_stemlengths_f (false);
+ for (int i = 0; i < 2; i++)
{
left_y_ += dy_f * dir_;
quantise_left_y (dy_f);
- dy_f = 0;
- for (int i=0; i < stems_.size (); i++)
- {
- Stem *s = stems_[i];
- if (s->transparent_b_)
- continue;
-
- Real x = s->hpos_f () - x0;
- // urg move this to stem-info
- Real sy = left_y_ + slope_f_ * x;
- if (dir_ != s->dir_)
- sy -= dir_ * (beam_f / 2
- + (s->mult_i_ - 1) * interbeam_f) / internote_f;
- s->set_stemend (sy);
- Real y = s->stem_end_f () * dir_;
- Stem_info info (s);
- if (y > info.maxy_f_)
- dy_f = dy_f <? info.maxy_f_ - y;
- if (y < info.miny_f_)
- {
- // when all too short, normal stems win..
- if (dy_f < -epsilon_f)
- warning (_ ("weird beam shift, check your knees"));
- dy_f = dy_f >? info.miny_f_ - y;
- }
- }
- if (damped_slope_dy_f && (dy_f >= 0))
- dy_f += damped_slope_dy_f;
- damped_slope_dy_f = 0;
+ dy_f = check_stemlengths_f (true);
if (abs (dy_f) <= epsilon_f)
{
- DOUT << "Beam::set_stemlens: " << jj << " iterations\n";
+ DOUT << "Beam::set_stemlens: " << i << " iterations\n";
break;
}
}
assert (stems_.size () == b.size ()/2);
}
- for (int j=0, i=0; i < b.size () && j <stems_.size (); i+= 2, j++)
+ for (int j=0, i=0; i < b.size () && j <stems_.size (); j++)
{
Stem *s = stems_[j];
- s->beams_left_i_ = b[i];
- s->beams_right_i_ = b[i+1];
- multiple_i_ = multiple_i_ >? (b[i] >? b[i+1]);
+ Direction d = LEFT;
+ do {
+ if (s->beams_i_drul_[d] < 0)
+ s->beams_i_drul_[d] = b[i];
+
+ multiple_i_ = multiple_i_ >? s->beams_i_drul_[d];
+ i++;
+ } while ((flip (&d)) != LEFT);
}
}
/* half beams extending to the left. */
if (prev)
{
- int lhalfs= lhalfs = here->beams_left_i_ - prev->beams_right_i_ ;
- int lwholebeams= here->beams_left_i_ <? prev->beams_right_i_ ;
+ int lhalfs= lhalfs = here->beams_i_drul_[LEFT] - prev->beams_i_drul_[RIGHT] ;
+ int lwholebeams= here->beams_i_drul_[LEFT] <? prev->beams_i_drul_[RIGHT] ;
/*
Half beam should be one note-width,
but let's make sure two half-beams never touch
*/
Real w = here->hpos_f () - prev->hpos_f ();
w = w/2 <? nw_f;
- Atom a;
+ Molecule a;
if (lhalfs) // generates warnings if not
a = lookup_l ()->beam (sl, w, beam_f);
a.translate (Offset (-w, -w * sl));
for (int j = 0; j < lhalfs; j++)
{
- Atom b (a);
+ Molecule b (a);
b.translate_axis (-dir_ * dy * (lwholebeams+j), Y_AXIS);
- leftbeams.add_atom (b);
+ leftbeams.add_molecule (b);
}
}
if (next)
{
- int rhalfs = here->beams_right_i_ - next->beams_left_i_;
- int rwholebeams = here->beams_right_i_ <? next->beams_left_i_;
+ int rhalfs = here->beams_i_drul_[RIGHT] - next->beams_i_drul_[LEFT];
+ int rwholebeams = here->beams_i_drul_[RIGHT] <? next->beams_i_drul_[LEFT];
Real w = next->hpos_f () - here->hpos_f ();
- Atom a = lookup_l ()->beam (sl, w + stemdx, beam_f);
+ Molecule a = lookup_l ()->beam (sl, w + stemdx, beam_f);
a.translate_axis( - stemdx/2, X_AXIS);
int j = 0;
Real gap_f = 0;
int nogap = rwholebeams - here->beam_gap_i_;
for (; j < nogap; j++)
{
- Atom b (a);
+ Molecule b (a);
b.translate_axis (-dir_ * dy * j, Y_AXIS);
- rightbeams.add_atom (b);
+ rightbeams.add_molecule (b);
}
// TODO: notehead widths differ for different types
gap_f = nw_f / 2;
for (; j < rwholebeams; j++)
{
- Atom b (a);
+ Molecule b (a);
b.translate (Offset (gap_f, -dir_ * dy * j));
- rightbeams.add_atom (b);
+ rightbeams.add_molecule (b);
}
w = w/2 <? nw_f;
for (; j < rwholebeams + rhalfs; j++)
{
- Atom b (a);
+ Molecule b (a);
b.translate_axis (-dir_ * dy * j, Y_AXIS);
- rightbeams.add_atom (b);
+ rightbeams.add_molecule (b);
}
}
projects / lilypond.git / blobdiff