source file of the GNU LilyPond music typesetter
- (c) 1996, 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1996, 1997--1999, 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
/*
- TODO:
-
- think about crossing stems.
- Begin and end should be treated as a Script.
+ [TODO]
+ * URG: share code with tie
+ * begin and end should be treated as a Script.
+ * damping
+ * slur from notehead to stemend: c''()b''
*/
+
#include "slur.hh"
#include "scalar.hh"
#include "lookup.hh"
#include "p-col.hh"
#include "molecule.hh"
#include "debug.hh"
-#include "boxes.hh"
+#include "box.hh"
+#include "bezier.hh"
+#include "encompass-info.hh"
+#include "main.hh"
+Slur::Slur ()
+{
+}
void
-Slur::add (Note_column*n)
+Slur::add_column (Note_column*n)
{
+ if (!n->head_l_arr_.size ())
+ warning (_ ("Putting slur over rest."));
encompass_arr_.push (n);
+ // n->stem_l_->slur_l_ = this;
add_dependency (n);
}
-void
-Slur::set_default_dir()
+Direction
+Slur::get_default_dir () const
{
- dir_ = DOWN;
- for (int i=0; i < encompass_arr_.size(); i ++)
+ Direction d = DOWN;
+ for (int i=0; i < encompass_arr_.size (); i ++)
{
- if (encompass_arr_[i]->dir_ < 0)
+ if (encompass_arr_[i]->dir () < 0)
{
- dir_ =UP;
+ d = UP;
break;
}
}
+ return d;
}
void
-Slur::do_pre_processing()
+Slur::do_add_processing ()
{
- set_bounds(LEFT, encompass_arr_[0]);
- set_bounds(RIGHT, encompass_arr_.top());
+ set_bounds (LEFT, encompass_arr_[0]);
+ if (encompass_arr_.size () > 1)
+ set_bounds (RIGHT, encompass_arr_.top ());
}
+void
+Slur::do_pre_processing ()
+{
+ // don't set directions
+}
void
-Slur::do_substitute_dependency (Score_elem*o, Score_elem*n)
+Slur::do_substitute_element_pointer (Score_element*o, Score_element*n)
{
int i;
- while ((i = encompass_arr_.find_i ((Note_column*)o->item())) >=0)
+ while ((i = encompass_arr_.find_i (dynamic_cast<Note_column *> (o))) >=0)
{
if (n)
- encompass_arr_[i] = (Note_column*)n->item();
+ encompass_arr_[i] = dynamic_cast<Note_column *> (n);
else
encompass_arr_.del (i);
}
}
-
static int
Note_column_compare (Note_column *const&n1 , Note_column* const&n2)
{
- return Item::left_right_compare(n1, n2);
+ return Item::left_right_compare (n1, n2);
+}
+
+bool
+Slur::broken_edge_b ( Direction dir) const
+{
+ return extrema ()[dir] != spanned_drul_[dir];
+}
+
+bool
+Slur::normal_edge_b ( Direction dir) const
+{
+ Note_column *n = extrema ()[dir];
+ return !broken_edge_b ( dir)
+ && n->stem_l_
+ && n->stem_l_->get_elt_property (transparent_scm_sym) == SCM_BOOL_F
+ && n->head_l_arr_.size ();
+}
+
+Drul_array<Note_column*>
+Slur::extrema ()const
+{
+ Drul_array<Note_column*> extrema;
+ extrema[LEFT] = encompass_arr_[0];
+ extrema[RIGHT] = encompass_arr_.top ();
+ return extrema;
}
+/*
+ TODO.
+
+ Unhair this.
+ */
void
-Slur::do_post_processing()
+Slur::do_post_processing ()
{
encompass_arr_.sort (Note_column_compare);
if (!dir_)
- set_default_dir();
- Real inter_f = paper()->internote_f ();
+ dir_ = get_default_dir ();
+
+ Real interline_f = paper_l ()->get_realvar (interline_scm_sym);
+ Real internote_f = interline_f / 2;
+ // URG
+ Real notewidth_f = paper_l ()->note_width () * 0.8;
+
+ /*
+ [OSU]: slur and tie placement
+
+ slurs:
+ * x = centre of head (upside-down: inner raakpunt stem) - d * gap
+
+ * y = length < 5ss : horizontal raakpunt + d * 0.25 ss
+ y = length >= 5ss : y next interline - d * 0.25 ss
+ --> height <= 5 length ?? we use <= 3 length, now...
+ */
- Drul_array<Note_column*> extrema;
- extrema[LEFT] = encompass_arr_[0];
- extrema[RIGHT] = encompass_arr_.top();
+ Real gap_f = paper_l ()->get_var ("slur_x_gap");
+
Direction d=LEFT;
- Real nw_f = paper()->note_width ();
do
{
- if (extrema[d] != spanned_drul_[d])
+ if (broken_edge_b (d))
{
+ // ugh -- check if needed
dx_f_drul_[d] = -d
- *(spanned_drul_[d]->width ().length ()/nw_f -0.5);
+ *(spanned_drul_[d]->extent (X_AXIS).length () - 0.5 * notewidth_f);
+
+ // prebreak
+ if (d == RIGHT)
+ {
+ dx_f_drul_[LEFT] = spanned_drul_[LEFT]->extent (X_AXIS).length ();
+
+ // urg -- check if needed
+ if (encompass_arr_.size () > 1)
+ dx_f_drul_[RIGHT] += notewidth_f;
+ }
+ }
+ /*
+ normal slur
+ */
+ else if (normal_edge_b (d))
+ {
+ Real notewidth_f = extrema ()[d]->extent (X_AXIS).length ();
+ dy_f_drul_[d] = (int)rint (extrema ()[d]->stem_l_-> extent (Y_AXIS)[dir_]);
+ dx_f_drul_[d] += 0.5 * notewidth_f - d * gap_f;
+ if (dir_ == extrema ()[d]->stem_l_->dir_)
+ {
+ if (dir_ == d)
+ dx_f_drul_[d] += 0.5 * dir_ * notewidth_f;
+ else
+ dx_f_drul_[d] += 0.25 * dir_ * notewidth_f;
+ }
+ }
+ else
+ {
+ Real notewidth_f = extrema ()[d]->extent (X_AXIS).length ();
+ dy_f_drul_[d] = (int)rint (extrema ()[d]->head_positions_interval ()
+ [dir_]) * internote_f;
+ dx_f_drul_[d] += 0.5 * notewidth_f - d * gap_f;
+ }
+ dy_f_drul_[d] += dir_ * interline_f;
+ if (extrema ()[d]->stem_l_ && (dir_ == extrema ()[d]->stem_l_->dir_))
+ dy_f_drul_[d] -= dir_ * internote_f;
+ }
+ while (flip(&d) != LEFT);
+
+ // now that both are set, do dependent
+ do
+ {
+ if (broken_edge_b (d))
+ {
+ Direction u = d;
+ flip(&u);
+
+ // postbreak
+ if (d == LEFT)
+ dy_f_drul_[u] += dir_ * internote_f;
+
+ dy_f_drul_[d] = dy_f_drul_[u];
+ }
+ }
+ while (flip(&d) != LEFT);
+
+ /*
+ Slur should follow line of music
+ */
+ if (normal_edge_b (LEFT)
+ && normal_edge_b (RIGHT)
+ && (extrema ()[LEFT]->stem_l_ != extrema ()[RIGHT]->stem_l_))
+ {
+ Real note_dy = extrema ()[RIGHT]->stem_l_->head_positions ()[dir_]
+ - extrema ()[LEFT]->stem_l_->head_positions ()[dir_];
+ Real dy = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
+ /*
+ Should we always follow note-heads, (like a tie)?
+ For now, only if the note_dy != slur_dy, we'll do
+ slur_dy := note_dy * factor.
+ */
+ if (sign (dy) != sign (note_dy))
+ {
+ Real damp_f = paper_l ()->get_var ("slur_slope_follow_music_factor");
+ Real realdy = note_dy * damp_f;
+ Direction adjust_dir = (Direction)(- dir_ * sign (realdy));
+ if (!adjust_dir)
+ adjust_dir = -dir_;
+ /*
+ adjust only if no beam gets in the way
+ */
+ if (!extrema ()[adjust_dir]->stem_l_->beam_l_
+ || (adjust_dir == extrema ()[adjust_dir]->stem_l_->dir_)
+ || (extrema ()[adjust_dir]->stem_l_->beams_i_drul_[-adjust_dir] < 1))
+ {
+ dy_f_drul_[adjust_dir] = dy_f_drul_[-adjust_dir]
+ + 2 * adjust_dir * realdy;
+ Real dx = notewidth_f / 2;
+ if (adjust_dir != extrema ()[adjust_dir]->stem_l_->dir_)
+ dx /= 2;
+ dx_f_drul_[adjust_dir] -= adjust_dir * dx;
+ }
}
- else if (extrema[d]->stem_l_ && !extrema[d]->stem_l_->transparent_b_)
- pos_i_drul_[d] = (int)rint (extrema[d]->stem_l_->height()[dir_]/inter_f);
- else
- pos_i_drul_[d] = (int)rint (extrema[d]->head_positions_interval()[dir_]);
- pos_i_drul_[d] += dir_;
}
- while ((d *= -1) != LEFT);
+
+ /*
+ Avoid too steep slurs.
+ */
+ Real damp_f = paper_l ()->get_var ("slur_slope_damping");
+ Offset d_off = Offset (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT],
+ dy_f_drul_[RIGHT] - dy_f_drul_[LEFT]);
+ d_off[X_AXIS] += extent (X_AXIS).length ();
+
+ Real ratio_f = abs (d_off[Y_AXIS] / d_off[X_AXIS]);
+ if (ratio_f > damp_f)
+ dy_f_drul_[(Direction)(- dir_ * sign (d_off[Y_AXIS]))] +=
+ dir_ * (ratio_f - damp_f) * d_off[X_AXIS];
+}
+
+Array<Offset>
+Slur::get_encompass_offset_arr () const
+{
+ Real notewidth = paper_l ()->note_width () * 0.8;
+ Real gap = paper_l ()->get_var ("slur_x_gap");
+
+ /*
+ urg. Calcs done wrt the leftmost note. Fixme.
+
+ Calcs ignore possibility of pre/postbreak.
+
+
+ */
+
+ Offset left = Offset (dx_f_drul_[LEFT], dy_f_drul_[LEFT]);
+ left[X_AXIS] += encompass_arr_[0]->stem_l_->hpos_f ();
+
+ Real internote = encompass_arr_[0]->stem_l_->staff_line_leading_f ()/2.0;
+
+ /*
+ <URG>
+ i don't understand these two, but *must* for symmetry
+ look at encompass array:
+ lilypond -D input/test/slur-symmetry*.ly
+ lilypond -D input/test/sleur.ly
+
+ do_post_processing should have calculated these into
+ dx_f_drul_[], no??
+
+ */
+
+ if (dir_ != encompass_arr_[0]->stem_l_->dir_)
+ left[X_AXIS] += - 0.5 * notewidth * encompass_arr_[0]->stem_l_->dir_
+ + gap;
+ else if (encompass_arr_[0]->stem_l_->dir_ == UP)
+ left[X_AXIS] -= notewidth;
+
+ if ((dir_ == encompass_arr_[0]->stem_l_->dir_)
+ && (encompass_arr_[0]->stem_l_->dir_ == DOWN))
+ left[Y_AXIS] -= internote * encompass_arr_[0]->stem_l_->dir_;
+ /* </URG> */
+
+ Offset d = Offset (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT],
+ dy_f_drul_[RIGHT] - dy_f_drul_[LEFT]);
+ d[X_AXIS] += extent (X_AXIS).length ();
+
+ int first = 1;
+ int last = encompass_arr_.size () - 1;
+
+ // prebreak
+ if (broken_edge_b (RIGHT))
+ last++;
+
+ // postbreak
+ if (broken_edge_b (LEFT))
+ first--;
+
+ Array<Offset> notes;
+ notes.push (Offset (0,0));
+
+ Real dy =0.0;
+ for (int i = 0; i < last; i++)
+ {
+ Encompass_info info (encompass_arr_[i], dir_, this);
+ if (i >= first)
+ notes.push (info.o_ - left);
+ else
+ dy = info.interstaff_f_;
+ }
+
+ notes[0][Y_AXIS] += dy;
+ notes.push (d);
+
+ return notes;
+}
+
+
+Array<Rod>
+Slur::get_rods () const
+{
+ Array<Rod> a;
+ Rod r;
+ r.item_l_drul_ = spanned_drul_;
+ r.distance_f_ = paper_l ()->get_var ("slur_x_minimum");
+
+ a.push (r);
+ return a;
}
-IMPLEMENT_IS_TYPE_B1(Slur,Spanner);
projects / lilypond.git / blobdiff