/*
+ slur.cc -- implement Slur
- TODO:
-
- think about crossing stems.
- Begin and end should be treated as a Script.
-
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1996, 1997--1999, 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
+*/
+
+/*
+ [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 "paper-def.hh"
-#include "notehead.hh"
+#include "note-column.hh"
+#include "stem.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()
+Slur::Slur ()
{
- open_right=open_left=false;
}
-Offset
-Slur::center() const
+void
+Slur::add_column (Note_column*n)
{
- int pos1 = encompass.top()->position_i_;
- int pos2 = encompass[0]->position_i_;
-
- int dy = pos1-pos2;
+ if (!n->head_l_arr_.size ())
+ warning (_ ("Putting slur over rest."));
+ encompass_arr_.push (n);
+ // n->stem_l_->slur_l_ = this;
+ add_dependency (n);
+}
- Real w = width().length();
+Direction
+Slur::get_default_dir () const
+{
+ Direction d = DOWN;
+ for (int i=0; i < encompass_arr_.size (); i ++)
+ {
+ if (encompass_arr_[i]->dir () < 0)
+ {
+ d = UP;
+ break;
+ }
+ }
+ return d;
+}
- return Offset(w/2,dy * paper()->internote());
+void
+Slur::do_add_processing ()
+{
+ set_bounds (LEFT, encompass_arr_[0]);
+ if (encompass_arr_.size () > 1)
+ set_bounds (RIGHT, encompass_arr_.top ());
}
void
-Slur::add(Notehead*n)
+Slur::do_pre_processing ()
{
- encompass.push(n);
- add_dependency(n);
+ // don't set directions
}
void
-Slur::set_default_dir()
+Slur::do_substitute_element_pointer (Score_element*o, Score_element*n)
{
- int sumpos=0;
- for (int i=0; i < encompass.size(); i ++) {
- sumpos += encompass[i]->position_i_;
+ int i;
+ while ((i = encompass_arr_.find_i (dynamic_cast<Note_column *> (o))) >=0)
+ {
+ if (n)
+ encompass_arr_[i] = dynamic_cast<Note_column *> (n);
+ else
+ encompass_arr_.del (i);
}
+}
- /* should consult stems */
- Real meanpos = sumpos/Real(encompass.size());
- if (meanpos < 5) // todo
- dir_i_ = -1;
- else
- dir_i_ = 1;
+static int
+Note_column_compare (Note_column *const&n1 , Note_column* const&n2)
+{
+ return Item::left_right_compare (n1, n2);
}
-void
-Slur::do_pre_processing()
+bool
+Slur::broken_edge_b ( Direction dir) const
+{
+ return extrema ()[dir] != spanned_drul_[dir];
+}
+
+bool
+Slur::normal_edge_b ( Direction dir) const
{
- right_col_l_ = encompass.top()->pcol_l_;
- left_col_l_ = encompass[0]->pcol_l_;
+ 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 ();
}
-Spanner*
-Slur::do_break_at(PCol*l, PCol*r) const
+Drul_array<Note_column*>
+Slur::extrema ()const
{
- assert(l->line_l_ == r->line_l_);
- Slur*ret = new Slur(*this);
+ 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 ()
+{
+ encompass_arr_.sort (Note_column_compare);
+ if (!dir_)
+ 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
- ret->encompass.set_size(0);
- for (int i =0; i < encompass.size(); i++) {
- if (encompass[i]->pcol_l_->line_l_==l->line_l_)
- ret->encompass.push(encompass[i]);
+ * 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...
+ */
+
+ Real gap_f = paper_l ()->get_var ("slur_x_gap");
+
+
+ Direction d=LEFT;
+
+ do
+ {
+ if (broken_edge_b (d))
+ {
+ // ugh -- check if needed
+ dx_f_drul_[d] = -d
+ *(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;
+ }
+ }
}
- if (right_col_l_ != r)
- ret->open_right = true;
- if (left_col_l_ != l)
- ret->open_left = true;
+ /*
+ 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 ();
- return ret;
+ 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];
}
-void
-Slur::do_post_processing()
+Array<Offset>
+Slur::get_encompass_offset_arr () const
{
- if (!dir_i_)
- set_default_dir();
+ 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;
}
-Molecule*
-Slur::brew_molecule_p() const
+
+Array<Rod>
+Slur::get_rods () const
{
- Molecule*output = new Molecule;
+ Array<Rod> a;
+ Rod r;
+ r.item_l_drul_ = spanned_drul_;
+ r.distance_f_ = paper_l ()->get_var ("slur_x_minimum");
- int minp=1000, maxp=-1000; // todo
- for (int i=0; i<encompass.size(); i++) {
- minp = encompass[i]->position_i_ <? minp;
- maxp = encompass[i]->position_i_ >? maxp;
- }
- assert(encompass.size()>0); // todo
-
- Notehead *lnote_p =encompass[0];
- Notehead *rnote_p =encompass.top();
- int lpos_i = lnote_p->position_i_;
- int rpos_i = rnote_p->position_i_;
- Offset left_off(lnote_p->x_dir_i_, lpos_i + 2*dir_i_);
- Offset right_off(lnote_p->x_dir_i_, rpos_i + 2*dir_i_);
- if (!lnote_p->extremal_i_)
- left_off += Offset(0.5, -dir_i_);
- if (!rnote_p->extremal_i_)
- right_off+= Offset(-0.5, -dir_i_);
-
- int dy = int(right_off.y - left_off.y);
-
- Real nw_f = paper()->note_width();
- Real nh_f = paper()->internote();
- Real w = width().length();
-
- w+= (right_off.x - left_off.x) * nw_f ;
- Real round_w = w; // slur lookup rounds the slurwidth .
-
- Symbol sl = paper()->lookup_l()->slur(dy , round_w, dir_i_);
-
- Real error = w-round_w;
-
- Atom a(sl);
- a.translate(Offset((left_off.x + 0.5 )*nw_f + error/2,
- left_off.y * nh_f));
- output->add(a);
- return output;
+ a.push (r);
+ return a;
}
-IMPLEMENT_STATIC_NAME(Slur);
projects / lilypond.git / blobdiff