source file of the GNU LilyPond music typesetter
(c) 1996,1997 Han-Wen Nienhuys <hanwen@stack.nl>
+
+ TODO: This is way too hairy
*/
#include "stem.hh"
-#include "dimen.hh"
+#include "dimen.hh"
#include "debug.hh"
#include "paper-def.hh"
#include "note-head.hh"
IMPLEMENT_IS_TYPE_B1 (Stem,Item);
-Stem::Stem ()
+Stem::Stem ()
{
/*
TODO: staff-size
- */
+ */
abbrev_flag_i_ = 0;
beam_l_ = 0;
beams_left_i_ = 0;
beams_right_i_ = 0;
- stem_bottom_f_ = stem_top_f_ = 0;
- flag_i_ = 4;
- dir_ =CENTER;
+ yextent_drul_[DOWN] = yextent_drul_[UP] = 0;
+ flag_i_ = 2;
+ dir_ = CENTER;
+ stem_xdir_ = LEFT;
staff_size_i_ = 8;
- stem_xoffset_f_ =0;
beam_gap_i_ = 0;
}
-int
-Stem::min_head_i () const
-{
- int m = 1000;
- for (int i =0; i < head_l_arr_.size (); i++)
- m = m <? head_l_arr_[i]->position_i_;
- return m;
-}
-
-int
-Stem::max_head_i () const
+Interval_t<int>
+Stem::head_positions () const
{
- int m = -1000;
+ 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_ << " print_flag? " << !(bool)beam_l_ << "abbrev_flag_i_" << abbrev_flag_i_;
+ DOUT << "flag "<< flag_i_ << "abbrev_flag_i_" << abbrev_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
{
- return (dir_ < 0)? stem_top_f_ : stem_bottom_f_;
+ return yextent_drul_[Direction(-dir_)];
}
Real
Stem::stem_end_f () const
{
- return (dir_ < 0)? stem_bottom_f_ : stem_top_f_;
+ return yextent_drul_[dir_];
}
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)
+Stem::add (Rhythmic_head *n)
{
- n->add_dependency (this);
- head_l_arr_.push (n);
-}
-
-void
-Stem::add (Rest *r)
-{
- rest_l_arr_.push (r);
- r->add_dependency (this); // ?
+ n->add_dependency (this); // ?
+ if (n->is_type_b (Note_head::static_name ()))
+ {
+ head_l_arr_.push ((Note_head*)n);
+ }
+ else if (n->is_type_b (Rest::static_name ()))
+ {
+ rest_l_arr_.push ((Rest*)n);
+ }
}
bool
Stem::invisible_b () const
{
-
- 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 ()
-{
- if (dir_)
- return (dir_ > 0) ? 0 : 1;
-
- int staff_center = staff_size_i_ / 2;
- int max = max_head_i () - staff_center;
- return max >? 0;
+ 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_bottom ()
+Stem::get_center_distance (Direction d)
{
- if (dir_)
- return (dir_ > 0) ? 1 : 0;
-
- int staff_center = staff_size_i_ / 2;
- int min = staff_center - min_head_i ();
- return min >? 0;
+ int staff_center = 0;
+ int distance = d*(head_positions()[d] - staff_center);
+ return distance >? 0;
}
Direction
Stem::get_default_dir ()
{
- if (dir_)
- return dir_;
- return (get_center_distance_from_top () >=
- get_center_distance_from_bottom ()) ?
- (Direction)-1 : (Direction)1;
+ return (get_center_distance (UP) >=
+ get_center_distance (DOWN))
+ ? DOWN
+ : UP;
}
void
Stem::set_default_stemlen ()
{
+ Real len = STEMLEN;
+ Real dy = paper ()->interbeam_f ();
+
+ // ugh, should get nice *rule* for this
+ if (abbrev_flag_i_ > 1)
+ len += (abbrev_flag_i_ - 1)* dy / 2;
+
+
if (!dir_)
set_default_dir ();
- // 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
+ /* If the stem points in the "wrong" direction, it should be
+ shortened, according to [Roush & Gourlay]. Their suggestion to knock off
+ a whole staffspace is a bit drastical though.
+ */
+ else if (dir_ != get_default_dir ())
+ len -= 1.0;
+
+ if (flag_i_ >= 5)
+ len += 2.0;
+ if (flag_i_ >= 6)
+ len += 1.0;
+
+ set_stemend ((dir_ > 0) ? head_positions()[BIGGER] + len :
+ head_positions()[SMALLER] - len);
+
+
+ if (dir_ * stem_end_f () < 0)
{
- 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);
+ set_stemend (0);
}
}
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;
+
+ if (dir_ == UP)
+ stem_xdir_ = RIGHT;
+ if (invisible_b ())
+ stem_xdir_ = CENTER;
}
/*
TODO
-
+
move into note_column.cc
*/
if (!head_l_arr_.size ())
return;
head_l_arr_.sort (Note_head::compare);
- if (dir_ < 0)
+ if (dir_ < 0)
head_l_arr_.reverse ();
-
+
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 ++)
+ 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]->x_dir_ = (stem_xdir_ == LEFT) ? LEFT : RIGHT;
parity = !parity;
}
else
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_ = dir_ * abs (flag_i_);
+ flag_i_ = flag_i_;
transparent_b_ = invisible_b ();
- empty_b_ = invisible_b ();
-
+ set_empty (invisible_b ());
}
{
r = abbrev_mol ().extent ().x ();
}
- else if (beam_l_ || abs (flag_i_) <= 4)
+ else if (beam_l_ || abs (flag_i_) <= 2)
; // TODO!
else
{
Paper_def*p= paper ();
- r = p->lookup_l ()->flag (flag_i_).dim.x ();
- r+= stem_xoffset_f_;
+ r = p->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 w = 1.5 * paper ()->lookup_l ()->ball (2).dim_.x ().length ();
Real beamdy = paper ()->interline_f () / 2;
int beams_i = 0;
if (beam_l_) {
// huh?
- slope = 2 * beam_l_->slope;
+ slope = 2 * beam_l_->slope;
// ugh, rather calc from Abbreviation_req
- beams_i = beams_right_i_ >? beams_left_i_;
+ 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);
+ a.translate_axis (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++)
+ a.translate_axis (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);
+ b.translate_axis (-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::brew_molecule_p () const
{
Molecule *mol_p =new Molecule;
-
- Real bot = stem_bottom_f_;
- Real top = stem_top_f_;
-
- assert (bot!=top);
-
Paper_def *p =paper ();
-
+ Drul_array<Real> stem_y = yextent_drul_;
Real dy = p->internote_f ();
+
+
+ Real head_wid = 0;
+ if (head_l_arr_.size ())
+ head_wid = head_l_arr_[0]->width ().length ();
+ stem_y[Direction(-dir_)] += dir_ * head_wid * tan(ANGLE)/(2*dy);
+
if (!invisible_b ())
{
- Symbol ss =p->lookup_l ()->stem (bot*dy,top*dy);
+ Atom ss =p->lookup_l ()->stem (stem_y[DOWN]*dy,
+ stem_y[UP]*dy);
mol_p->add (Atom (ss));
}
-
- if (!beam_l_ &&abs (flag_i_) > 4)
+
+ if (!beam_l_ &&abs (flag_i_) > 2)
{
- Symbol fl = p->lookup_l ()->flag (flag_i_);
- Molecule m (fl);
- if (flag_i_ < -4)
- {
- mol_p->add_at_edge (Y_AXIS, DOWN, m);
- }
- else if (flag_i_ > 4)
- {
- mol_p->add_at_edge (Y_AXIS, UP, m);
- }
- else
- assert (false);
- assert (!abbrev_flag_i_);
- }
+ Atom fl = p->lookup_l ()->flag (flag_i_, dir_);
+ fl.translate_axis(stem_y[dir_]*dy, Y_AXIS);
+ mol_p->add(fl);
+ assert (!abbrev_flag_i_);
+ }
if (abbrev_flag_i_)
mol_p->add (abbrev_mol ());
-
- mol_p->translate (stem_xoffset_f_, X_AXIS);
+
+ if (head_l_arr_.size())
+ {
+ mol_p->translate_axis (note_delta_f (), X_AXIS);
+ }
return mol_p;
}
+Real
+Stem::note_delta_f () const
+{
+ Real r=0;
+ if (head_l_arr_.size())
+ {
+ Interval head_wid(0, head_l_arr_[0]->width ().length ());
+ Real rule_thick(paper ()->rule_thickness ());
+ Interval stem_wid(-rule_thick/2, rule_thick/2);
+ r = head_wid[stem_xdir_] - stem_wid[stem_xdir_];
+ }
+ return r;
+}
Real
Stem::hpos_f () const
{
- return Item::hpos_f () + stem_xoffset_f_;
+ return note_delta_f () +Item::hpos_f ();
}
-
+/*
+ TODO: head_l_arr_/rest_l_arr_ in do_substitute_dependent ()
+ */
void
-Stem::do_substitute_dependency (Score_elem*o,Score_elem*n)
+ Stem::do_substitute_dependency (Score_elem*o,Score_elem*n)
{
Item * o_l = o->item ();
Item * n_l = n? n->item () : 0;
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