-#include "varray.hh"
+/*
+ beam.cc -- implement Beam
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+
+ TODO
+
+ Less hairy code. knee: ([\stem 1; c8 \stem -1; c8]
+*/
+
+#include <math.h>
+
+#include "p-col.hh"
+#include "varray.hh"
#include "proto.hh"
#include "dimen.hh"
#include "beam.hh"
+#include "abbreviation-beam.hh"
#include "misc.hh"
#include "debug.hh"
-#include "symbol.hh"
+#include "atom.hh"
#include "molecule.hh"
#include "leastsquares.hh"
-#include "p-col.hh"
#include "stem.hh"
#include "paper-def.hh"
#include "lookup.hh"
#include "grouping.hh"
+#include "stem-info.hh"
+#include "main.hh" // experimental features
+IMPLEMENT_IS_TYPE_B1 (Beam, Spanner);
-struct Stem_info {
- Real x;
- Real idealy;
- Real miny;
- int no_beams;
-
-
- Stem_info(){}
- Stem_info(Stem const *);
+// ugh, hardcoded
+const Real MINIMUM_STEMLEN[] = {
+ 0, // just in case
+ 5,
+ 4,
+ 3,
+ 2,
+ 2,
};
-Stem_info::Stem_info(Stem const *s)
+Beam::Beam ()
{
- x = s->hindex();
- int dir = s->dir_i_;
- idealy = max(dir*s->top, dir*s->bot);
- miny = max(dir*s->minnote, dir*s-> maxnote);
- assert(miny <= idealy);
+ slope_f_ = 0;
+ left_y_ = 0.0;
+ damping_i_ = 1;
+ quantisation_ = NORMAL;
+ multiple_i_ = 0;
+}
+void
+Beam::add (Stem*s)
+{
+ stems_.push (s);
+ s->add_dependency (this);
+ s->beam_l_ = this;
+
+ if (!spanned_drul_[LEFT])
+ set_bounds (LEFT,s);
+ else
+ set_bounds (RIGHT,s);
}
-/* *************** */
+Molecule*
+Beam::brew_molecule_p () const
+{
+ Molecule *mol_p = new Molecule;
+ Real inter_f = paper ()->internote_f ();
+ Real x0 = stems_[0]->hpos_f ();
+ for (int j=0; j <stems_.size (); j++)
+ {
+ Stem *i = stems_[j];
+ Stem * prev = (j > 0)? stems_[j-1] : 0;
+ Stem * next = (j < stems_.size ()-1) ? stems_[j+1] :0;
+
+ Molecule sb = stem_beams (i, next, prev);
+ Real x = i->hpos_f ()-x0;
+ sb.translate (Offset (x, (x * slope_f_ + left_y_)* inter_f));
+ mol_p->add (sb);
+ }
+ mol_p->translate_axis (x0 - spanned_drul_[LEFT]->absolute_coordinate (X_AXIS), X_AXIS);
+ return mol_p;
+}
Offset
-Beam::center()const
+Beam::center () const
{
- assert(status >= POSTCALCED);
+ Real w= (paper ()->note_width () + width ().length ())/2.0;
+ return Offset (w, (left_y_ + w* slope_f_)*paper ()->internote_f ());
+}
- Real w=(paper()->note_width() + width().length())/2.0;
- return Offset(w, (left_pos + w* slope)*paper()->internote());
+void
+Beam::do_pre_processing ()
+{
+ if (!dir_)
+ set_default_dir ();
}
+void
+Beam::do_print () const
+{
+#ifndef NPRINT
+ DOUT << "slope_f_ " <<slope_f_ << "left ypos " << left_y_;
+ Spanner::do_print ();
+#endif
+}
-Beam::Beam()
+void
+Beam::do_post_processing ()
{
- slope = 0;
- left_pos = 0.0;
+ if (stems_.size () < 2)
+ {
+ warning (_ ("Beam with less than 2 stems"));
+ transparent_b_ = true;
+ return ;
+ }
+ solve_slope ();
+ set_stemlens ();
}
void
-Beam::add(Stem*s)
+Beam::do_substitute_dependent (Score_elem*o,Score_elem*n)
+{
+ if (o->is_type_b (Stem::static_name ()))
+ stems_.substitute ((Stem*)o->item (), n? (Stem*) n->item ():0);
+}
+
+Interval
+Beam::do_width () const
{
- stems.bottom().add(s);
- s->add_dependency(this);
- s->print_flag = false;
+ return Interval (stems_[0]->hpos_f (),
+ stems_.top ()->hpos_f ());
}
void
-Beam::set_default_dir()
+Beam::set_default_dir ()
{
- int dirs[2];
- dirs[0]=0; dirs[1] =0;
- for (iter_top(stems,i); i.ok(); i++) {
- int d = i->get_default_dir();
- dirs[(d+1)/2] ++;
- }
- dir_i_ = (dirs[0] > dirs[1]) ? -1 : 1;
- for (iter_top(stems,i); i.ok(); i++) {
- i->dir_i_ = dir_i_;
+ 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];
+ int current = s->dir_
+ ? (1 + d * s->dir_)/2
+ : s->get_center_distance (Direction (-d));
+
+ if (current)
+ {
+ total[d] += current;
+ count[d] ++;
+ }
+
+ } while ((d *= -1) != DOWN);
+
+ do {
+ if (!total[d])
+ count[d] = 1;
+ } while ((d *= -1) != DOWN);
+
+ /*
+
+ [Ross] states that the majority of the notes dictates the
+ direction (and not the mean of "center distance")
+ */
+ dir_ = (total[UP] > total[DOWN]) ? UP : DOWN;
+
+ for (int i=0; i <stems_.size (); i++)
+ {
+ Stem *sl = stems_[i];
+ sl->dir_ = dir_;
}
}
/*
should use minimum energy formulation (cf linespacing)
- */
+*/
void
-Beam::solve_slope()
+Beam::solve_slope ()
{
- Array<Stem_info> sinfo;
- for (iter_top(stems,i); i.ok(); i++) {
- i->set_default_extents();
- Stem_info info(i);
- sinfo.push(info);
+ Array<Stem_info> sinfo;
+ for (int j=0; j <stems_.size (); j++)
+ {
+ Stem *i = stems_[j];
+
+ i->set_default_extents ();
+ if (i->invisible_b ())
+ continue;
+
+ Stem_info info (i);
+ sinfo.push (info);
}
- Real leftx = sinfo[0].x;
- Least_squares l;
- for (int i=0; i < sinfo.size(); i++) {
- sinfo[i].x -= leftx;
- l.input.push(Offset(sinfo[i].x, sinfo[i].idealy));
+ if (! sinfo.size ())
+ slope_f_ = left_y_ = 0;
+ else if (sinfo.size () == 1)
+ {
+ slope_f_ = 0;
+ left_y_ = sinfo[0].idealy_f_;
}
+ else
+ {
- l.minimise(slope, left_pos);
- Real dy = 0.0;
- for (int i=0; i < sinfo.size(); i++) {
- Real y = sinfo[i].x * slope + left_pos;
- Real my = sinfo[i].miny;
+ Real leftx = sinfo[0].x;
+ Least_squares l;
+ for (int i=0; i < sinfo.size (); i++)
+ {
+ sinfo[i].x -= leftx;
+ l.input.push (Offset (sinfo[i].x, sinfo[i].idealy_f_));
+ }
- if (my - y > dy)
- dy = my -y;
+ l.minimise (slope_f_, left_y_);
}
- left_pos += dy;
- left_pos *= dir_i_;
- slope *= dir_i_;
-
- // URG
- Real sl = slope*paper()->internote();
- paper()->lookup_l()->beam(sl, 20 PT);
- slope = sl /paper()->internote();
-}
-void
-Beam::set_stemlens()
-{
- iter_top(stems,s);
- Real x0 = s->hindex();
- for (; s.ok() ; s++) {
- Real x = s->hindex()-x0;
- s->set_stemend(left_pos + slope * x);
+ 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_;
+
+ if (my - y > dy)
+ dy = my -y;
}
+ left_y_ += dy;
+ left_y_ *= dir_;
+
+ slope_f_ *= dir_;
+
+ /*
+ 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_yspan ();
+
+ // y-values traditionally use internote dimension: therefore slope = (y/in)/x
+ // but mf and beam-lookup use PT dimension for y (as used for x-values)
+ // ugh --- there goes our simplified but careful quantisation
+ Real sl = slope_f_ * paper ()->internote_f ();
+ paper ()->lookup_l ()->beam (sl, 20 PT, 1 PT);
+ slope_f_ = sl / paper ()->internote_f ();
}
-
void
-Beam::do_post_processing()
+Beam::quantise_yspan ()
{
- solve_slope();
- set_stemlens();
+ /*
+ [Ross] (simplification of)
+ Try to set slope_f_ complying with y-span of:
+ - zero
+ - beam_thickness / 2 + staffline_thickness / 2
+ - beam_thickness + staffline_thickness
+ + n * interline
+ */
+
+ if (!quantisation_)
+ return;
+
+ Real interline_f = paper ()->interline_f ();
+ Real internote_f = interline_f / 2;
+ Real staffline_thickness = paper ()->rule_thickness ();
+ Real beam_thickness = 0.48 * (interline_f - staffline_thickness);
+
+ const int QUANTS = 3;
+ Real qdy[QUANTS] = {
+ 0,
+ beam_thickness / 2 + staffline_thickness / 2,
+ beam_thickness + staffline_thickness
+ };
+
+ Real xspan_f = stems_.top ()->hpos_f () - stems_[0]->hpos_f ();
+ // y-values traditionally use internote dimension: therefore slope = (y/in)/x
+ Real yspan_f = xspan_f * abs (slope_f_ * internote_f);
+ int yspan_i = (int)(yspan_f / interline_f);
+ Real q = (yspan_f / interline_f - yspan_i) * interline_f;
+ int i = 0;
+ for (; i < QUANTS - 1; i++)
+ if ((q >= qdy[i]) && (q <= qdy[i + 1]))
+ {
+ if (q - qdy[i] < qdy[i + 1] - q)
+ break;
+ else
+ {
+ i++;
+ break;
+ }
+ }
+ q = qdy[i];
+
+ yspan_f = (Real)yspan_i * interline_f + q;
+ // y-values traditionally use internote dimension: therefore slope = (y/in)/x
+ slope_f_ = yspan_f / xspan_f / internote_f * sign (slope_f_);
}
void
-Beam::set_grouping(Rhythmic_grouping def, Rhythmic_grouping cur)
+Beam::quantise_left_y (Beam::Pos pos, bool extend_b)
{
- def.OK();
- cur.OK();
- assert(cur.children.size() == stems.size());
-
- cur.split(def);
-
- Array<int> b;
+ /*
+ quantising left y should suffice, as slope is quantised too
+ if extend then stems must not get shorter
+ */
+
+ if (!quantisation_)
+ return;
+
+ Real interline_f = paper ()->interline_f ();
+ Real internote_f = interline_f / 2;
+ Real staffline_thickness = paper ()->rule_thickness ();
+ Real beam_thickness = 0.48 * (interline_f - staffline_thickness);
+
+ const int QUANTS = 7;
+ Real qy[QUANTS] =
+ {
+ 0,
+ beam_thickness / 2,
+ beam_thickness,
+ interline_f / 2 + beam_thickness / 2 + staffline_thickness / 2,
+ interline_f,
+ interline_f + beam_thickness / 2,
+ interline_f + beam_thickness
+ };
+ /*
+ ugh, using i triggers gcc 2.7.2.1 internal compiler error (far down):
+ for (int i = 0; i < QUANTS; i++)
+ */
+
+ // fixme!
+ for (int ii = 0; ii < QUANTS; ii++)
+ qy[ii] -= 0.5 *beam_thickness;
+ Pos qpos[QUANTS] =
+ {
+ HANG,
+ STRADDLE,
+ SIT,
+ INTER,
+ HANG,
+ STRADDLE,
+ SIT
+ };
+
+ // y-values traditionally use internote dimension
+ Real y = left_y_ * internote_f;
+ int y_i = (int)floor(y / interline_f);
+ y = (y / interline_f - y_i) * interline_f;
+
+ if (y < 0)
+ for (int ii = 0; ii < QUANTS; ii++)
+ qy[ii] -= interline_f;
+
+ int lower_i = 0;
+ int i = 0;
+ for (; i < QUANTS; i++)
{
- iter_top(stems,s);
- Array<int> flags;
- for (; s.ok(); s++) {
- int f = intlog2(abs(s->flag))-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);
+ if (qy[i] > y)
+ break;
+ // found if lower_i is allowed, and nearer (from below) y than new pos
+ if ((pos & qpos[lower_i]) && (y - qy[lower_i] < y - qy[i]))
+ break;
+ // if new pos is allowed or old pos isn't: assign new pos
+ if ((pos & qpos[i]) || !(pos & qpos[lower_i]))
+ lower_i = i;
}
- iter_top(stems,s);
- for (int i=0; i < b.size() && s.ok(); i+=2, s++) {
- s->beams_left = b[i];
- s->beams_right = b[i+1];
+ int upper_i = QUANTS - 1;
+ for (i = QUANTS - 1; i >= 0; i--)
+ {
+ if (qy[i] < y)
+ break;
+ // found if upper_i is allowed, and nearer (from above) y than new pos
+ if ((pos & qpos[upper_i]) && (qy[upper_i] - y < qy[i] - y))
+ break;
+ // if new pos is allowed or old pos isn't: assign new pos
+ if ((pos & qpos[i]) || !(pos & qpos[upper_i]))
+ upper_i = i;
}
-}
+ // y-values traditionally use internote dimension
+ Real upper_y = (qy[upper_i] + interline_f * y_i) / internote_f;
+ Real lower_y = (qy[lower_i] + interline_f * y_i) / internote_f;
-// todo.
-Spanner *
-Beam::do_break_at( PCol *, PCol *) const
-{
- Beam *beam_p= new Beam(*this);
-
- return beam_p;
+ if (extend_b)
+ left_y_ = (dir_ > 0 ? upper_y : lower_y);
+ else
+ left_y_ = (upper_y - y < y - lower_y ? upper_y : lower_y);
}
void
-Beam::do_pre_processing()
+Beam::set_stemlens ()
{
- left_col_l_ = (*stems.top()) ->pcol_l_;
- right_col_l_ = (*stems.bottom())->pcol_l_;
- assert(stems.size()>1);
- if (!dir_i_)
- set_default_dir();
-
+ Real x0 = stems_[0]->hpos_f ();
+ Real dy = 0;
+
+ Real interline_f = paper ()->interline_f ();
+ Real internote_f = interline_f / 2;
+ Real staffline_thickness = paper ()->rule_thickness ();
+ Real beam_thickness = 0.48 * (interline_f - staffline_thickness);
+ Real interbeam_f = paper ()->interbeam_f ();
+ if (multiple_i_ > 3)
+ interbeam_f += 2.0 * staffline_thickness / 4;
+ Real xspan_f = stems_.top ()->hpos_f () - stems_[0]->hpos_f ();
+ /*
+ ugh, y values are in "internote" dimension
+ */
+ Real yspan_f = xspan_f * abs (slope_f_ * internote_f);
+ int yspan_i = (int)(yspan_f / interline_f);
+
+ Pos left_pos = NONE;
+
+ if ((yspan_f < staffline_thickness / 2) || (quantisation_ == NORMAL))
+ left_pos = (Pos)(STRADDLE | SIT | HANG);
+ else
+ left_pos = (Pos) (sign (slope_f_) > 0 ? STRADDLE | HANG
+ : SIT | STRADDLE);
+
+ /*
+ ugh, slope currently mangled by availability mf chars...
+ be more generous regarding beam position between stafflines
+ */
+ Real q = (yspan_f / interline_f - yspan_i) * interline_f;
+ if (q < interline_f / 3 - beam_thickness / 2)
+ left_pos = (Pos) (left_pos | INTER);
+
+ if (multiple_i_ > 1)
+ left_pos = (Pos) (dir_ > 0 ? HANG : SIT);
+
+ // ugh, rounding problems!
+ const Real EPSILON = interline_f / 10;
+ do
+ {
+ left_y_ += dy * dir_;
+ quantise_left_y (left_pos, dy);
+ dy = 0;
+ for (int j=0; j < stems_.size (); j++)
+ {
+ Stem *s = stems_[j];
+ if (s->transparent_b_)
+ continue;
+
+ Real x = s->hpos_f () - x0;
+ s->set_stemend (left_y_ + slope_f_ * x);
+ Real y = s->stem_length_f ();
+ int mult = max (stems_[j]->beams_left_i_, stems_[j]->beams_right_i_);
+ if (mult > 1)
+ // dim(y) = internote
+ y -= (Real)(mult - 1) * interbeam_f / internote_f;
+ if (y < MINIMUM_STEMLEN[mult])
+ dy = dy >? (MINIMUM_STEMLEN[mult] - y);
+ }
+ } while (abs (dy) > EPSILON);
}
-
-Interval
-Beam::do_width() const
+void
+Beam::set_grouping (Rhythmic_grouping def, Rhythmic_grouping cur)
{
- Beam * me = (Beam*) this; // ugh
- return Interval( (*me->stems.top()) ->hindex(),
- (*me->stems.bottom()) ->hindex() );
+ 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 (); i+= 2, 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]);
+ }
}
/*
beams to go with one stem.
*/
Molecule
-Beam::stem_beams(Stem *here, Stem *next, Stem *prev)const
+Beam::stem_beams (Stem *here, Stem *next, Stem *prev) const
{
- assert( !next || next->hindex() > here->hindex() );
- assert( !prev || prev->hindex() < here->hindex() );
- Real dy=paper()->internote()*2;
- Real stemdx = paper()->rule_thickness();
- Real sl = slope*paper()->internote();
- paper()->lookup_l()->beam(sl, 20 PT);
-
- Molecule leftbeams;
- Molecule rightbeams;
-
- /* half beams extending to the left. */
- if (prev) {
- int lhalfs= lhalfs = here->beams_left - prev->beams_right ;
- int lwholebeams= here->beams_left <? prev->beams_right ;
- Real w = (here->hindex() - prev->hindex())/4;
- Symbol dummy;
- Atom a(dummy);
- if (lhalfs) // generates warnings if not
- a = paper()->lookup_l()->beam(sl, w);
- a.translate(Offset (-w, -w * sl));
- for (int j = 0; j < lhalfs; j++) {
- Atom b(a);
- b.translate(Offset(0, -dir_i_ * dy * (lwholebeams+j)));
- leftbeams.add( b );
+ assert (!next || next->hpos_f () > here->hpos_f ());
+ assert (!prev || prev->hpos_f () < here->hpos_f ());
+
+ Real staffline_thickness = paper ()->rule_thickness ();
+ Real interbeam_f = paper ()->interbeam_f ();
+ Real internote_f =paper ()->internote_f ();
+ Real interline_f = 2 * internote_f;
+ Real beamheight_f = 0.48 * (interline_f - staffline_thickness);
+ if (multiple_i_ > 3)
+ interbeam_f += 2.0 * staffline_thickness / 4;
+ Real dy = interbeam_f;
+ Real stemdx = staffline_thickness;
+ Real sl = slope_f_* internote_f;
+ paper ()->lookup_l ()->beam (sl, 20 PT, 1 PT);
+
+ Molecule leftbeams;
+ Molecule rightbeams;
+
+ /* 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_ ;
+ Real w = (here->hpos_f () - prev->hpos_f ())/4 <? paper ()->note_width ();;
+ Atom a;
+ if (lhalfs) // generates warnings if not
+ a = paper ()->lookup_l ()->beam (sl, w, beamheight_f);
+ a.translate (Offset (-w, -w * sl));
+ for (int j = 0; j < lhalfs; j++)
+ {
+ Atom b (a);
+ b.translate_axis (-dir_ * dy * (lwholebeams+j), Y_AXIS);
+ leftbeams.add (b);
}
}
-
- if (next){
- int rhalfs = here->beams_right - next->beams_left;
- int rwholebeams = here->beams_right <? next->beams_left;
-
- Real w = next->hindex() - here->hindex();
- Atom a = paper()->lookup_l()->beam(sl, w + stemdx);
-
- int j = 0;
- for (; j < rwholebeams; j++) {
- Atom b(a);
- b.translate(Offset(0, -dir_i_ * dy * j));
- rightbeams.add( b );
- }
- w /= 4;
- if (rhalfs)
- a = paper()->lookup_l()->beam(sl, w);
-
- for (; j < rwholebeams + rhalfs; j++) {
- Atom b(a);
- b.translate(Offset(0, -dir_i_ * dy * j));
- rightbeams.add(b );
+ if (next)
+ {
+ int rhalfs = here->beams_right_i_ - next->beams_left_i_;
+ int rwholebeams = here->beams_right_i_ <? next->beams_left_i_;
+
+ Real w = next->hpos_f () - here->hpos_f ();
+ Atom a = paper ()->lookup_l ()->beam (sl, w + stemdx, beamheight_f);
+ a.translate_axis( - stemdx/2, X_AXIS);
+ int j = 0;
+ Real gap_f = 0;
+ if (here->beam_gap_i_)
+ {
+ int nogap = rwholebeams - here->beam_gap_i_;
+ for (; j < nogap; j++)
+ {
+ Atom b (a);
+ b.translate_axis (-dir_ * dy * j, Y_AXIS);
+ rightbeams.add (b);
+ }
+ // TODO: notehead widths differ for different types
+ gap_f = paper ()->note_width () / 2;
+ w -= 2 * gap_f;
+ a = paper ()->lookup_l ()->beam (sl, w + stemdx, beamheight_f);
}
-
- }
- leftbeams.add(rightbeams);
- return leftbeams;
-}
-
-
-Molecule*
-Beam::brew_molecule_p() const return out;
-{
- Real inter=paper()->internote();
- out = new Molecule;
- Real x0 = stems.top()->hindex();
-
- for (iter_top(stems,i); i.ok(); i++) {
- PCursor<Stem*> p(i-1);
- PCursor<Stem*> n(i+1);
- Stem * prev = p.ok() ? p.ptr() : 0;
- Stem * next = n.ok() ? n.ptr() : 0;
-
- Molecule sb = stem_beams(i, next, prev);
- Real x = i->hindex()-x0;
- sb.translate(Offset(x, (x * slope + left_pos)* inter));
- out->add(sb);
- }
- out->translate(Offset(x0 - left_col_l_->hpos,0));
-}
-IMPLEMENT_STATIC_NAME(Beam);
+ for (; j < rwholebeams; j++)
+ {
+ Atom b (a);
+ b.translate (Offset (gap_f, -dir_ * dy * j));
+ rightbeams.add (b);
+ }
-void
-Beam::do_print()const
-{
-#ifndef NPRINT
- mtor << "slope " <<slope << "left ypos " << left_pos;
- Spanner::print();
-#endif
-}
+ w = w/4 <? paper ()->note_width ();
+ if (rhalfs)
+ a = paper ()->lookup_l ()->beam (sl, w, beamheight_f);
-Beam::~Beam()
-{
+ for (; j < rwholebeams + rhalfs; j++)
+ {
+ Atom b (a);
+ b.translate_axis (-dir_ * dy * j, Y_AXIS);
+ rightbeams.add (b);
+ }
+ }
+ leftbeams.add (rightbeams);
+
+ /*
+ Does beam quanting think of the asymetry of beams?
+ Refpoint is on bottom of symbol. (FIXTHAT) --hwn.
+ */
+ if (experimental_features_global_b && dir_ < 0)
+ leftbeams.translate_axis (-beamheight_f, Y_AXIS);
+ return leftbeams;
}
projects / lilypond.git / blobdiff