source file of the GNU LilyPond music typesetter
- (c) 1996,1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1996, 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
TODO: This is way too hairy
*/
#include "stem.hh"
-#include "dimen.hh"
#include "debug.hh"
#include "paper-def.hh"
#include "note-head.hh"
#include "beam.hh"
#include "rest.hh"
-const int STEMLEN=7;
+void
+Stem::set_direction (Direction d)
+{
+ if (!dir_)
+ warning ("Stem direction set already!");
-IMPLEMENT_IS_TYPE_B1 (Stem,Item);
+ dir_ = d;
-Stem::Stem ()
-{
/*
- TODO: staff-size
- */
- abbrev_flag_i_ = 0;
- beam_l_ = 0;
- beams_left_i_ = 0;
- beams_right_i_ = 0;
+ todo
+ */
+}
- stem_bottom_f_ = stem_top_f_ = 0;
+Stem::Stem ()
+{
+ beams_i_drul_[LEFT] = beams_i_drul_[RIGHT] = -1;
+ yextent_drul_[DOWN] = yextent_drul_[UP] = 0;
flag_i_ = 2;
dir_ = CENTER;
- staff_size_i_ = 8;
-
- stem_xoffset_f_ =0;
- beam_gap_i_ = 0;
+ beam_l_ = 0;
}
-int
-Stem::min_head_i () const
+Interval_t<int>
+Stem::head_positions () const
{
- int m = 1000;
- for (int i =0; i < head_l_arr_.size (); i++)
- m = m <? head_l_arr_[i]->position_i_;
- return m;
-}
+ /*
+ Mysterious FreeBSD fix by John Galbraith. Somehow, the empty intervals
+ trigger FP exceptions on FreeBSD. Fix: do not return infinity
-int
-Stem::max_head_i () const
-{
- int m = -1000;
+ */
+ if (!head_l_arr_.size ())
+ {
+ return Interval_t<int> (100,-100);
+ }
+
+ Interval_t<int> r;
for (int i =0; i < head_l_arr_.size (); i++)
- m = m >? head_l_arr_[i]->position_i_;
- return m;
-
+ {
+ int p = head_l_arr_[i]->position_i_;
+ r[BIGGER] = r[BIGGER] >? p;
+ r[SMALLER] = r[SMALLER] <? p;
+ }
+ return r;
}
void
Stem::do_print () const
{
#ifndef NPRINT
- DOUT << "flag "<< flag_i_ << "abbrev_flag_i_" << abbrev_flag_i_;
+ DOUT << "flag "<< flag_i_;
if (beam_l_)
DOUT << "beamed";
#endif
}
-Real
+Real
Stem::stem_length_f () const
{
- return stem_top_f_-stem_bottom_f_ ;
+ return yextent_drul_[UP]-yextent_drul_[DOWN] ;
}
Real
-Stem::stem_start_f () const
+Stem::stem_begin_f () const
{
- return (dir_ < 0)? stem_top_f_ : stem_bottom_f_;
+ return yextent_drul_[Direction(-dir_)];
}
Real
-Stem::stem_end_f () const
+Stem::chord_start_f () const
{
- return (dir_ < 0)? stem_bottom_f_ : stem_top_f_;
+ return head_positions()[dir_] * staff_line_leading_f ()/2.0;
}
+Real
+Stem::stem_end_f () const
+{
+ return yextent_drul_[dir_];
+}
void
Stem::set_stemend (Real se)
{
// todo: margins
- if (! ((dir_ > 0 && se >= max_head_i ()) ||
- (se <= min_head_i () && dir_ <0)))
- warning ("Weird stem size; check for narrow beams");
+ if (dir_ && dir_ * head_positions()[dir_] >= se*dir_)
+ warning (_ ("weird stem size; check for narrow beams"));
- stem_top_f_ = (dir_ < 0) ? max_head_i () : se;
- stem_bottom_f_ = (dir_ < 0) ? se : min_head_i ();
+
+ yextent_drul_[dir_] = se;
+ yextent_drul_[Direction(-dir_)] = head_positions()[-dir_];
}
int
}
void
-Stem::add (Note_head *n)
-{
- n->add_dependency (this);
- head_l_arr_.push (n);
-}
-
-void
-Stem::add (Rest *r)
+Stem::add_head (Rhythmic_head *n)
{
- rest_l_arr_.push (r);
- r->add_dependency (this); // ?
+ n->add_dependency (this); // ?
+ if (Note_head *nh = dynamic_cast<Note_head *> (n))
+ {
+ head_l_arr_.push (nh);
+ }
+ else if (Rest *r = dynamic_cast<Rest *> (n))
+ {
+ rest_l_arr_.push (r);
+ }
}
bool
Stem::invisible_b () const
{
-
- return (!head_l_arr_.size () ||
+ return (!head_l_arr_.size () ||
head_l_arr_[0]->balltype_i_ <= 0);
-
}
-// if dir_ is set we return fake values.
int
-Stem::get_center_distance_from_top ()
+Stem::get_center_distance (Direction d) const
{
- if (dir_)
- return (dir_ > 0) ? 0 : 1;
-
- int staff_center = staff_size_i_ / 2;
- int max = max_head_i () - staff_center;
- return max >? 0;
+ int staff_center = 0;
+ int distance = d*(head_positions()[d] - staff_center);
+ return distance >? 0;
}
-// if dir_ is set we return fake values.
-int
-Stem::get_center_distance_from_bottom ()
+Direction
+Stem::get_default_dir () const
{
- if (dir_)
- return (dir_ > 0) ? 1 : 0;
-
- int staff_center = staff_size_i_ / 2;
- int min = staff_center - min_head_i ();
- return min >? 0;
+ return (get_center_distance (UP) >
+ get_center_distance (DOWN))
+ ? DOWN
+ : UP;
}
Direction
-Stem::get_default_dir ()
+Stem::get_dir () const
{
- if (dir_)
- return dir_;
- return (get_center_distance_from_top () >=
- get_center_distance_from_bottom ()) ?
- (Direction)-1 : (Direction)1;
+ return dir_;
}
-
void
Stem::set_default_dir ()
{
void
Stem::set_default_stemlen ()
{
+ Real internote_f = staff_line_leading_f ()/2.0;
+ Real length_f = paper_l ()->get_var ("stem_length0") / internote_f;
+ Real shorten_f = paper_l ()->get_var ("forced_stem_shorten0") / internote_f;
+
if (!dir_)
set_default_dir ();
+ /*
+ stems in unnatural (forced) direction should be shortened,
+ according to [Roush & Gourlay]
+ */
+ if (((int)chord_start_f ())
+ && (dir_ != get_default_dir ()))
+ length_f -= shorten_f;
+
+ if (flag_i_ >= 5)
+ length_f += 2.0;
+ if (flag_i_ >= 6)
+ length_f += 1.0;
+
+ set_stemend ((dir_ > 0) ? head_positions()[BIGGER] + length_f:
+ head_positions()[SMALLER] - length_f);
- // ugh... how about non 5-line staffs?
- bool on_ledger_line_b = ((max_head_i () < -2 && dir_ == 1)
- // || (min_head_i () > staff_size_i_ && dir_ == -1));
- || (min_head_i () > staff_size_i_ + 3 && dir_ == -1));
- if (on_ledger_line_b)
- {
- set_stemend (staff_size_i_ / 2 - 1);
- }
- else
- {
- Real dy = paper ()->interbeam_f ();
- Real len = STEMLEN;
- // ugh, should get nice *rule* for this
- if (abbrev_flag_i_ > 1)
- len += (abbrev_flag_i_ - 1)* dy / 2;
- set_stemend ((dir_ > 0) ? max_head_i () + len :
- min_head_i () - len);
- }
+ if (dir_ * stem_end_f () < 0)
+ set_stemend (0);
}
+//xxx
void
Stem::set_default_extents ()
{
if (!stem_length_f ())
set_default_stemlen ();
- set_stemend ((dir_< 0) ?
- max_head_i ()-stem_length_f (): min_head_i () + stem_length_f ());
- // ugh, a whole ball is wider
- if (head_l_arr_[0]->balltype_i_ <= 0)
- stem_xoffset_f_ = paper ()->note_width () / 2;
- else if (dir_ > 0)
- stem_xoffset_f_ = paper ()->note_width () - paper ()->rule_thickness ();
- else
- stem_xoffset_f_ = 0;
}
-/*
- TODO
-
- move into note_column.cc
-
- */
void
Stem::set_noteheads ()
{
if (!head_l_arr_.size ())
return;
head_l_arr_.sort (Note_head::compare);
- if (dir_ < 0)
+ if (dir_ < 0)
head_l_arr_.reverse ();
+
+ Note_head * beginhead = head_l_arr_[0];
+ beginhead->set_elt_property (extremal_scm_sym, SCM_BOOL_T);
+ if (beginhead != head_l_arr_.top ())
+ head_l_arr_.top ()->set_elt_property (extremal_scm_sym, SCM_BOOL_T);
- head_l_arr_[0]->extremal_i_ = -1;
- head_l_arr_.top ()->extremal_i_ = 1;
int parity=1;
- int lastpos = head_l_arr_[0]->position_i_;
- for (int i=1; i < head_l_arr_.size (); i ++)
+ int lastpos = beginhead->position_i_;
+ for (int i=1; i < head_l_arr_.size (); i ++)
{
int dy =abs (lastpos- head_l_arr_[i]->position_i_);
-
- if (dy <= 1)
+
+ if (dy <= 1)
{
if (parity)
- head_l_arr_[i]->x_dir_ = (stem_xoffset_f_>0) ? UP:DOWN;
+ head_l_arr_[i]->flip_around_stem (dir_);
parity = !parity;
}
else
- parity = 0;
+ parity = 1;
lastpos = head_l_arr_[i]->position_i_;
}
}
void
Stem::do_pre_processing ()
{
- if (stem_bottom_f_== stem_top_f_)
+ if (yextent_drul_[DOWN]== yextent_drul_[UP])
set_default_extents ();
set_noteheads ();
flag_i_ = flag_i_;
- transparent_b_ = invisible_b ();
+ if (invisible_b ())
+ {
+ set_elt_property (transparent_scm_sym, SCM_BOOL_T);
+ }
set_empty (invisible_b ());
}
Stem::do_width () const
{
Interval r (0, 0);
- if (abbrev_flag_i_)
- {
- r = abbrev_mol ().extent ().x ();
- }
- else if (beam_l_ || abs (flag_i_) <= 2)
+ if (beam_l_ || abs (flag_i_) <= 2)
; // TODO!
else
{
- Paper_def*p= paper ();
- r = p->lookup_l ()->flag (flag_i_, dir_).dim.x ();
- r+= stem_xoffset_f_;
+ r = lookup_l ()->flag (flag_i_, dir_).dim_.x ();
+ r += note_delta_f ();
}
return r;
}
-
-Molecule
- Stem::abbrev_mol () const
-{
- Real dy = paper ()->interbeam_f ();
- Real w = 1.5 * paper ()->lookup_l ()->ball (2).dim.x ().length ();
- Real beamdy = paper ()->interline_f () / 2;
-
- int beams_i = 0;
- Real slope = paper ()->internote_f () / 4;
-
- if (beam_l_) {
- // huh?
- slope = 2 * beam_l_->slope;
- // ugh, rather calc from Abbreviation_req
- beams_i = beams_right_i_ >? beams_left_i_;
- }
- paper ()->lookup_l ()->beam (slope, 20 PT);
-
- Molecule beams;
- Atom a (paper ()->lookup_l ()->beam (slope, w));
- a.translate (Offset(- w / 2, stem_end_f () - (w / 2 * slope)));
- // ugh
- if (!beams_i)
- a.translate (dy + beamdy - dir_ * dy, Y_AXIS);
- else
- a.translate (2 * beamdy - dir_ * (beamdy - dy), Y_AXIS);
-
- for (int i = 0; i < abbrev_flag_i_; i++)
- {
- Atom b (a);
- b.translate (-dir_ * dy * (beams_i + i), Y_AXIS);
- beams.add (b);
- }
-
- return beams;
-}
+
+
+const Real ANGLE = 20* (2.0*M_PI/360.0); // ugh!
Molecule*
- Stem::brew_molecule_p () const
+Stem::do_brew_molecule_p () const
{
Molecule *mol_p =new Molecule;
+ Drul_array<Real> stem_y = yextent_drul_;
+ Real dy = staff_line_leading_f ()/2.0;
+
+ Real head_wid = 0;
+ if (head_l_arr_.size ())
+ head_wid = head_l_arr_[0]->extent (X_AXIS).length ();
+ stem_y[Direction(-dir_)] += dir_ * head_wid * tan(ANGLE)/(2*dy);
- Real bot = stem_bottom_f_;
- Real top = stem_top_f_;
-
- assert (bot!=top);
-
- Paper_def *p =paper ();
-
- Real dy = p->internote_f ();
if (!invisible_b ())
{
- Symbol ss =p->lookup_l ()->stem (bot*dy,top*dy);
- mol_p->add (Atom (ss));
+ Molecule ss =lookup_l ()->stem (stem_y[DOWN]*dy,
+ stem_y[UP]*dy);
+ mol_p->add_molecule (ss);
}
-
- if (!beam_l_ &&abs (flag_i_) > 2)
+
+ if (!beam_l_ && abs (flag_i_) > 2)
{
- Symbol fl = p->lookup_l ()->flag (flag_i_, dir_);
- mol_p->add_at_edge (Y_AXIS, dir_, Molecule (Atom (fl)));
- assert (!abbrev_flag_i_);
+ Molecule fl = lookup_l ()->flag (flag_i_, dir_);
+ fl.translate_axis(stem_y[dir_]*dy, Y_AXIS);
+ mol_p->add_molecule (fl);
+ }
+
+ if (head_l_arr_.size())
+ {
+ mol_p->translate_axis (note_delta_f (), X_AXIS);
}
-
- if (abbrev_flag_i_)
- mol_p->add (abbrev_mol ());
-
- mol_p->translate (stem_xoffset_f_, X_AXIS);
return mol_p;
}
Real
- Stem::hpos_f () const
+Stem::note_delta_f () const
{
- return Item::hpos_f () + stem_xoffset_f_;
+ Real r=0;
+ if (head_l_arr_.size())
+ {
+ Interval head_wid(0, head_l_arr_[0]->extent (X_AXIS).length ());
+ Real rule_thick(paper_l ()->rule_thickness ());
+ Interval stem_wid(-rule_thick/2, rule_thick/2);
+ if (dir_ == CENTER)
+ r = head_wid.center ();
+ else
+ r = head_wid[dir_] - stem_wid[dir_];
+ }
+ return r;
}
+Real
+Stem::hpos_f () const
+{
+ return note_delta_f () + Item::hpos_f ();
+}
void
- Stem::do_substitute_dependency (Score_elem*o,Score_elem*n)
+Stem::do_substitute_element_pointer (Score_element*o,Score_element*n)
{
- Item * o_l = o->item ();
- Item * n_l = n? n->item () : 0;
- head_l_arr_.substitute ((Note_head*)o_l, (Note_head*)n_l);
- rest_l_arr_.substitute ((Rest*)o_l, (Rest*)n_l);
+ if (Note_head*h=dynamic_cast<Note_head*> (o))
+ head_l_arr_.substitute (h, dynamic_cast<Note_head*>(n));
+ if (Rest *r=dynamic_cast<Rest*> (o))
+ rest_l_arr_.substitute (r, dynamic_cast<Rest*>(n));
+ if (Beam* b = dynamic_cast<Beam*> (o))
+ {
+ if (b == beam_l_)
+ beam_l_ = dynamic_cast<Beam*> (n);
+ }
+ Staff_symbol_referencer::do_substitute_element_pointer (o,n);
}
projects / lilypond.git / blobdiff