source file of the GNU LilyPond music typesetter
- (c) 1997--1999, 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
*/
#include <math.h>
+#include "chord-tremolo.hh"
+#include "beaming.hh"
#include "proto.hh"
#include "dimensions.hh"
#include "beam.hh"
#include "stem.hh"
#include "paper-def.hh"
#include "lookup.hh"
-#include "rhythmic-grouping.hh"
Beam::Beam ()
{
Beam::add_stem (Stem*s)
{
#if 0
+ /*
+ should figure out why this didn't work.
+
+ --hwn.
+ */
if (!stems_.size ())
{
- dim_cache_[Y_AXIS].parent_l_ = &s->dim_cache_[Y_AXIS];
+ set_parent (s, Y_AXIS);
}
#endif
stems_.push (s);
s->add_dependency (this);
+
+ assert (!s->beam_l_);
s->beam_l_ = this;
if (!spanned_drul_[LEFT])
mol_p->add_molecule (sb);
}
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
- Stem_info si = sinfo_.top ();
- mol_p->translate_axis (-si.interstaff_f_ * si.stem_l_->staff_line_leading_f ()/2,
- Y_AXIS);
+ - spanned_drul_[LEFT]->relative_coordinate (0, X_AXIS), X_AXIS);
return mol_p;
}
si.stem_l_->staff_line_leading_f ()/2);
}
+/*
+ Simplistic auto-knees; only consider vertical gap between two
+ adjacent chords
+ */
+bool
+Beam::auto_knee (SCM gap, bool interstaff_b)
+{
+ bool knee = false;
+ int knee_y = 0;
+ Real internote_f = stems_[0]->staff_line_leading_f ()/2;
+ if (gap != SCM_BOOL_F)
+ {
+ int auto_gap_i = gh_scm2int (SCM_CDR (gap));
+ for (int i=1; i < stems_.size (); i++)
+ {
+ bool is_b = (bool)(sinfo_[i].interstaff_f_ - sinfo_[i-1].interstaff_f_);
+ int l_y = (int)(stems_[i-1]->chord_start_f () / internote_f)
+ + (int)sinfo_[i-1].interstaff_f_;
+ int r_y = (int)(stems_[i]->chord_start_f () / internote_f)
+ + (int)sinfo_[i].interstaff_f_;
+ int gap_i = r_y - l_y;
+
+ /*
+ Forced stem directions are ignored. If you don't want auto-knees,
+ don't set, or unset autoKneeGap/autoInterstaffKneeGap.
+ */
+ if ((abs (gap_i) >= auto_gap_i) && (!interstaff_b || is_b))
+ {
+ knee_y = (r_y + l_y) / 2;
+ knee = true;
+ break;
+ }
+ }
+ }
+ if (knee)
+ {
+ for (int i=0; i < stems_.size (); i++)
+ {
+ int y = (int)(stems_[i]->chord_start_f () / internote_f)
+ + (int)sinfo_[i].interstaff_f_;
+ stems_[i]->dir_ = y < knee_y ? UP : DOWN;
+ stems_[i]->set_elt_property (dir_forced_scm_sym, SCM_BOOL_T);
+ }
+ }
+ return knee;
+}
+
+bool
+Beam::auto_knees ()
+{
+ if (auto_knee (get_elt_property (auto_interstaff_knee_gap_scm_sym), true))
+ return true;
+
+ return auto_knee (get_elt_property (auto_knee_gap_scm_sym), false);
+}
+
+
void
Beam::do_pre_processing ()
{
+ /*
+ urg: it seems that info on whether beam (voice) dir was forced
+ is being junked here?
+ */
if (!dir_)
- set_default_dir ();
+ dir_ = get_default_dir ();
+
+ set_direction (dir_);
}
void
Beam::do_print () const
{
#ifndef NPRINT
- DOUT << "slope_f_ " << slope_f_ << "left ypos " << left_y_;
+ DEBUG_OUT << "slope_f_ " << slope_f_ << "left ypos " << left_y_;
Spanner::do_print ();
#endif
}
{
warning (_ ("beam with less than two stems"));
set_elt_property (transparent_scm_sym, SCM_BOOL_T);
- return ;
+ return;
+ }
+ set_steminfo ();
+ if (auto_knees ())
+ {
+ /*
+ if auto-knee did its work, most probably stem directions
+ have changed, so we must recalculate all.
+ */
+ dir_ = get_default_dir ();
+ set_direction (dir_);
+
+ /* auto-knees used to only work for slope = 0
+ anyway, should be able to set slope per beam
+ set_elt_property (damping_scm_sym, gh_int2scm(1000));
+ */
+
+ sinfo_.clear ();
+ set_steminfo ();
}
calculate_slope ();
set_stemlens ();
stems_.top ()->hpos_f ());
}
-void
-Beam::set_default_dir ()
+Direction
+Beam::get_default_dir () const
{
Drul_array<int> total;
total[UP] = total[DOWN] = 0;
Drul_array<int> count;
count[UP] = count[DOWN] = 0;
Direction d = DOWN;
-
+
for (int i=0; i <stems_.size (); i++)
do {
Stem *s = stems_[i];
wants to provide some real simple hands-on rules.
We have our doubts, so we simply provide all sensible alternatives.
+
+ If dir is not determined: up (see stem::get_default_dir ())
*/
+ Direction beam_dir;
+ Direction neutral_dir = (Direction)(int)paper_l ()->get_var ("stem_default_neutral_direction");
+
Dir_algorithm a = (Dir_algorithm)rint(paper_l ()->get_var ("beam_dir_algorithm"));
switch (a)
{
case MAJORITY:
- dir_ = (count[UP] > count[DOWN]) ? UP : DOWN;
+ beam_dir = (count[UP] == count[DOWN]) ? neutral_dir
+ : (count[UP] > count[DOWN]) ? UP : DOWN;
break;
case MEAN:
- // mean centre distance
- dir_ = (total[UP] > total[DOWN]) ? UP : DOWN;
+ // mean center distance
+ beam_dir = (total[UP] == total[DOWN]) ? neutral_dir
+ : (total[UP] > total[DOWN]) ? UP : DOWN;
break;
default:
case MEDIAN:
- // median centre distance
- if (!count[UP])
- dir_ = DOWN;
- else if (!count[DOWN])
- dir_ = UP;
+ // median center distance
+ if (!count[DOWN] || !count[UP])
+ {
+ beam_dir = (count[UP] == count[DOWN]) ? neutral_dir
+ : (count[UP] > count[DOWN]) ? UP : DOWN;
+ }
else
- dir_ = (total[UP] / count[UP] > total[DOWN] / count[DOWN]) ? UP : DOWN;
+ {
+ beam_dir = (total[UP] / count[UP] == total[DOWN] / count[DOWN])
+ ? neutral_dir
+ : (total[UP] / count[UP] > total[DOWN] / count[DOWN]) ? UP : DOWN;
+ }
break;
}
+ return beam_dir;
+}
+void
+Beam::set_direction (Direction d)
+{
+ dir_ = d;
for (int i=0; i <stems_.size (); i++)
{
Stem *s = stems_[i];
- s->set_elt_property (beam_dir_scm_sym, gh_int2scm (dir_));
+ s->set_elt_property (beam_dir_scm_sym, gh_int2scm (d));
SCM force = s->remove_elt_property (dir_forced_scm_sym);
if (force == SCM_BOOL_F)
- s->dir_ = dir_;
+ s->dir_ = d;
}
}
Beam::solve_slope ()
{
assert (sinfo_.size () > 1);
- DOUT << "Beam::solve_slope: \n";
+ DEBUG_OUT << "Beam::solve_slope: \n";
Least_squares l;
for (int i=0; i < sinfo_.size (); i++)
l.minimise (slope_f_, left_y_);
}
+/*
+ ugh. Naming: this doesn't check, but sets as well.
+ */
+
Real
Beam::check_stemlengths_f (bool set_b)
{
{
// 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;
+ warning (_ ("weird beam vertical offset"));
+ dy_f = dy_f >? sinfo_[i].miny_f_ - y;
}
}
return dy_f;
return;
assert (multiple_i_);
+
int total_count_i = 0;
int forced_count_i = 0;
for (int i=0; i < stems_.size (); i++)
total_count_i++;
}
- Real internote_f = stems_[0]->staff_line_leading_f ()/2;
+ bool grace_b = get_elt_property (grace_scm_sym) != SCM_BOOL_F;
+ String type_str = grace_b ? "grace_" : "";
int stem_max = (int)rint(paper_l ()->get_var ("stem_max"));
- Real shorten_f = paper_l ()->get_var (String ("forced_stem_shorten"
- + to_str (multiple_i_ <? stem_max)))
- / internote_f;
+ Real shorten_f = paper_l ()->get_var (type_str + "forced_stem_shorten"
+ + to_str (multiple_i_ <? stem_max));
Real leftx = 0;
for (int i=0; i < stems_.size (); i++)
{
Stem *s = stems_[i];
- if (s->invisible_b ())
- continue;
+ /*
+ Chord tremolo needs to beam over invisible stems of wholes
+ */
+ if (!dynamic_cast<Chord_tremolo*> (this))
+ {
+ if (s->invisible_b ())
+ continue;
+ }
Stem_info info (s, multiple_i_);
if (leftx == 0)
void
Beam::calculate_slope ()
{
- set_steminfo ();
if (!sinfo_.size ())
slope_f_ = left_y_ = 0;
else if (sinfo_[0].idealy_f_ == sinfo_.top ().idealy_f_)
Interval iv = quantise_iv (allowed_fraction, interline_f, dy_f);
- quanty_f = (dy_f - iv.min () <= iv.max () - dy_f)
- ? iv.min ()
- : iv.max ();
+ quanty_f = (dy_f - iv[SMALLER] <= iv[BIGGER] - dy_f)
+ ? iv[SMALLER]
+ : iv[BIGGER];
slope_f_ = (quanty_f / dx_f) / internote_f * sign (slope_f_);
Interval iv = quantise_iv (allowed_position, space, dy_f);
- Real quanty_f = dy_f - iv.min () <= iv.max () - dy_f ? iv.min () : iv.max ();
+ Real quanty_f = dy_f - iv[SMALLER] <= iv[BIGGER] - dy_f ? iv[SMALLER] : iv[BIGGER];
if (extend_b)
- quanty_f = iv.max ();
+ quanty_f = iv[BIGGER];
// dim(left_y_) = internote
left_y_ = dir_ * quanty_f / internote_f;
// enge floots
Real epsilon_f = staffline_f / 8;
- DOUT << "Beam::set_stemlens: \n";
+
+ // je bent zelf eng --hwn.
Real dy_f = check_stemlengths_f (false);
for (int i = 0; i < 2; i++)
{
dy_f = check_stemlengths_f (true);
if (abs (dy_f) <= epsilon_f)
{
- DOUT << "Beam::set_stemlens: " << i << " iterations\n";
break;
}
}
test_pos %= 4;
}
-/*
- FIXME
- ugh. this is broken and should be rewritten.
- - [c8. c32 c32]
- */
void
-Beam::set_grouping (Rhythmic_grouping def, Rhythmic_grouping cur)
+Beam::set_beaming (Beaming_info_list *beaming)
+{
+ Direction d = LEFT;
+ for (int i=0; i < stems_.size (); i++)
+ {
+ do
+ {
+ if (stems_[i]->beams_i_drul_[d] < 0)
+ stems_[i]->beams_i_drul_[d] = beaming->infos_.elem (i).beams_i_drul_[d];
+ }
+ while (flip (&d) != LEFT);
+ }
+}
+
+
+void
+Beam::do_add_processing ()
{
- def.OK ();
- cur.OK ();
- assert (cur.children.size () == stems_.size ());
-
- cur.split (def);
-
- Array<int> b;
- {
- Array<int> flags;
- for (int j=0; j <stems_.size (); j++)
- {
- Stem *s = stems_[j];
-
- int f = s->flag_i_ - 2;
- assert (f>0);
- flags.push (f);
- }
- int fi =0;
- b= cur.generate_beams (flags, fi);
- b.insert (0,0);
- b.push (0);
- assert (stems_.size () == b.size ()/2);
- }
-
- for (int j=0, i=0; i < b.size () && j <stems_.size (); j++)
+ for (int i=0; i < stems_.size () ; i++)
{
- Stem *s = stems_[j];
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++;
+ multiple_i_ = multiple_i_ >? stems_[i]->beams_i_drul_[d];
} while ((flip (&d)) != LEFT);
}
+
+ if (stems_.size ())
+ {
+ stems_[0]->beams_i_drul_[LEFT] =0;
+ stems_.top()->beams_i_drul_[RIGHT] =0;
+ }
}
+
+
/*
beams to go with one stem.
*/
Molecule
Beam::stem_beams (Stem *here, Stem *next, Stem *prev) const
{
- assert (!next || next->hpos_f () > here->hpos_f ());
- assert (!prev || prev->hpos_f () < here->hpos_f ());
+ if ((next && !(next->hpos_f () > here->hpos_f ())) ||
+ (prev && !(prev->hpos_f () < here->hpos_f ())))
+ programming_error ("Beams are not left-to-right");
Real staffline_f = paper_l ()->rule_thickness ();
Real interbeam_f = paper_l ()->interbeam_f (multiple_i_);
Molecule rightbeams;
// UGH
- Real nw_f = paper_l ()->note_width () * 0.8;
+ Real nw_f;
+ if (!here->head_l_arr_.size ())
+ nw_f = 0;
+ else if (here->type_i ()== 1)
+ nw_f = paper_l ()->get_var ("wholewidth");
+ else if (here->type_i () == 2)
+ nw_f = paper_l ()->note_width () * 0.8;
+ else
+ nw_f = paper_l ()->get_var ("quartwidth");
/* half beams extending to the left. */
if (prev)
SCM gap = get_elt_property (beam_gap_scm_sym);
if (gap != SCM_BOOL_F)
{
- int gap_i = gh_scm2int (gap);
+ int gap_i = gh_scm2int (SCM_CDR (gap));
int nogap = rwholebeams - gap_i;
for (; j < nogap; j++)
for (; j < rwholebeams; j++)
{
Molecule b (a);
- b.translate (Offset (gap_f, -dir_ * dy * j));
+ if (!here->invisible_b ())
+ b.translate (Offset (gap_f, -dir_ * dy * j));
+ else
+ b.translate (Offset (0, -dir_ * dy * j));
rightbeams.add_molecule (b);
}
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