source file of the GNU LilyPond music typesetter
- (c) 1996, 1997 Han-Wen Nienhuys <hanwen@stack.nl>
- Jan Nieuwenhuizen <jan@digicash.com>
+ (c) 1996--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
/*
[TODO]
- * begin and end should be treated as a Script.
- * damping
- * slur from notehead to stemend: c''()b''
+ * begin and end should be treated as a/acknowledge Scripts.
+ * broken slur should have uniform trend
+ * smart changing of endings
+ * smart changing of (Y-?)offsets to avoid ugly beziers
+ (along-side-stem)
*/
+#include "directional-element-interface.hh"
+#include "group-interface.hh"
#include "slur.hh"
-#include "scalar.hh"
#include "lookup.hh"
#include "paper-def.hh"
#include "note-column.hh"
#include "stem.hh"
-#include "p-col.hh"
+#include "paper-column.hh"
#include "molecule.hh"
#include "debug.hh"
-#include "boxes.hh"
-#include "bezier.hh"
-
-//IMPLEMENT_IS_TYPE_B1(Slur,Spanner);
-IMPLEMENT_IS_TYPE_B1(Slur,Bow);
-
-Slur::Slur ()
+#include "slur-bezier-bow.hh"
+#include "main.hh"
+#include "cross-staff.hh"
+#include "group-interface.hh"
+#include "staff-symbol-referencer.hh"
+
+Slur::Slur (SCM s)
+ : Spanner (s)
{
+ set_elt_property ("attachment", gh_cons (SCM_BOOL_F, SCM_BOOL_F));
+ set_elt_pointer ("note-columns", SCM_EOL);
+ set_elt_property ("control-points", SCM_EOL);
}
void
-Slur::add (Note_column*n)
+Slur::add_column (Note_column*n)
{
- encompass_arr_.push (n);
- add_dependency (n);
+ if (!gh_pair_p (n->get_elt_pointer ("note-heads")))
+ warning (_ ("Putting slur over rest. Ignoring."));
+ else
+ {
+ Pointer_group_interface (this, "note-columns").add_element (n);
+ add_dependency (n);
+ }
+
+ add_bound_item (this, n);
}
void
-Slur::set_default_dir ()
+Slur::de_uglyfy (Slur_bezier_bow* bb, Real default_height)
+{
+ Real length = bb->curve_.control_[3][X_AXIS] ;
+ Real ff = bb->fit_factor ();
+ for (int i = 1; i < 3; i++)
+ {
+ Real ind = abs (bb->curve_.control_[(i-1)*3][X_AXIS]
+ - bb->curve_.control_[i][X_AXIS]) / length;
+ Real h = bb->curve_.control_[i][Y_AXIS] * ff / length;
+
+ Real f = default_height / length;
+ Real c1 = paper_l ()->get_var ("bezier_control1");
+ Real c2 = paper_l ()->get_var ("bezier_control2");
+ Real c3 = paper_l ()->get_var ("bezier_control3");
+ if (h > c1 * f)
+ {
+ h = c1 * f;
+ }
+ else if (h > c2 + c3 * ind)
+ {
+ h = c2 + c3 * ind;
+ }
+
+ bb->curve_.control_[i][Y_AXIS] = h * length;
+ }
+
+ bb->curve_.assert_sanity ();
+}
+
+Direction
+Slur::get_default_dir () const
{
- dir_ = DOWN;
- for (int i=0; i < encompass_arr_.size (); i ++)
+ Link_array<Note_column> encompass_arr =
+ Pointer_group_interface__extract_elements (this, (Note_column*)0, "note-columns");
+
+ 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_add_processing ()
{
- set_bounds (LEFT, encompass_arr_[0]);
- if (encompass_arr_.size () > 1)
- set_bounds (RIGHT, encompass_arr_.top ());
-}
+#if 0
+ Link_array<Note_column> encompass_arr =
+ Pointer_group_interface__extract_elements (this, (Note_column*)0, "note-columns");
-void
-Slur::do_pre_processing ()
-{
- // don't set directions
+ if (encompass_arr.size ())
+ {
+ set_bound (LEFT, encompass_arr[0]);
+ if (encompass_arr.size () > 1)
+ set_bound (RIGHT, encompass_arr.top ());
+ }
+#endif
}
-void
-Slur::do_substitute_dependency (Score_elem*o, Score_elem*n)
+
+
+Offset
+Slur::encompass_offset (Note_column const* col) const
{
- int i;
- while ((i = encompass_arr_.find_i ((Note_column*)o->item ())) >=0)
+ Offset o;
+ Stem* stem_l = col->stem_l ();
+ Direction dir = Directional_element_interface (this).get ();
+
+ if (!stem_l)
{
- if (n)
- encompass_arr_[i] = (Note_column*)n->item ();
- else
- encompass_arr_.del (i);
+ warning (_ ("Slur over rest?"));
+ o[X_AXIS] = col->relative_coordinate (0, X_AXIS);
+ o[Y_AXIS] = col->extent (Y_AXIS)[dir];
+ return o;
}
+ Direction stem_dir = Directional_element_interface (stem_l).get ();
+ o[X_AXIS] = stem_l->relative_coordinate (0, X_AXIS);
+
+ /*
+ Simply set x to middle of notehead
+ */
+
+ o[X_AXIS] -= 0.5 * stem_dir * col->extent (X_AXIS).length ();
+
+ if ((stem_dir == dir)
+ && !stem_l->extent (Y_AXIS).empty_b ())
+ {
+ o[Y_AXIS] = stem_l->extent (Y_AXIS)[dir];
+ }
+ else
+ {
+ o[Y_AXIS] = col->extent (Y_AXIS)[dir];
+ }
+
+ /*
+ leave a gap: slur mustn't touch head/stem
+ */
+ o[Y_AXIS] += dir * paper_l ()->get_var ("slur_y_free");
+ o[Y_AXIS] -= calc_interstaff_dist (stem_l, this);
+ return o;
}
-static int
-Note_column_compare (Note_column *const&n1 , Note_column* const&n2)
+GLUE_SCORE_ELEMENT(Slur,after_line_breaking);
+
+SCM
+Slur::member_after_line_breaking ()
{
- return Item::left_right_compare (n1, n2);
+ set_extremities ();
+ set_control_points ();
+ return SCM_UNDEFINED;
+}
+
+SCM
+slur_get_bound (SCM slur, SCM dir)
+{
+ return ((Slur*)unsmob_element (slur))->get_bound (to_dir (dir))->self_scm_;
}
-void
-Slur::do_post_processing ()
+SCM
+score_element_get_pointer (SCM se, SCM name)
{
- encompass_arr_.sort (Note_column_compare);
- if (!dir_)
- set_default_dir ();
- Real interline_f = paper ()->interline_f ();
- Real inter_f = interline_f / 2;
+ SCM s = scm_assq (name, unsmob_element (se)->pointer_alist_);
+ return (s == SCM_BOOL_F) ? SCM_UNDEFINED : gh_cdr (s);
+}
- /*
- [OSU]: slur and tie placement
+SCM
+score_element_get_property (SCM se, SCM name)
+{
+ SCM s = scm_assq (name, unsmob_element (se)->property_alist_);
+ return (s == SCM_BOOL_F) ? SCM_UNDEFINED : gh_cdr (s);
+}
- slurs:
- * x = centre of head (upside-down: inner raakpunt stem) - d * gap
+void
+init_score_elts ()
+{
+ scm_make_gsubr ("get-pointer", 2 , 0, 0,
+ (SCM(*)(...)) score_element_get_pointer);
+ scm_make_gsubr ("get-property", 2 , 0, 0,
+ (SCM(*)(...)) score_element_get_property);
+ scm_make_gsubr ("get-bound", 2 , 0, 0,
+ (SCM(*)(...)) slur_get_bound);
+}
- * 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...
+ADD_SCM_INIT_FUNC (score_elt, init_score_elts);
- * suggested gap = ss / 5;
- */
- // jcn: 1/5 seems so small?
- Real gap_f = interline_f / 2; // 5;
-
- Drul_array<Note_column*> extrema;
- extrema[LEFT] = encompass_arr_[0];
- extrema[RIGHT] = encompass_arr_.top ();
+void
+Slur::set_extremities ()
+{
+ if (!Directional_element_interface (this).get ())
+ Directional_element_interface (this).set (get_default_dir ());
- Direction d=LEFT;
- Real nw_f = paper ()->note_width ();
-
+ Direction dir = LEFT;
do
{
- if (extrema[d] != spanned_drul_[d])
+ if (!gh_symbol_p (index_cell (get_elt_property ("attachment"), dir)))
{
- dx_f_drul_[d] = -d
- *(spanned_drul_[d]->width ().length () -0.5*nw_f);
- Direction u = d;
- flip(&u);
- if ((extrema[u] == spanned_drul_[u]) && extrema[u]->stem_l_)
+
+ // for (SCM s = get_elt_property ("slur-extremity-rules"); s != SCM_EOL; s = gh_cdr (s))
+ for (SCM s = scm_eval (ly_symbol2scm ("slur-extremity-rules"));
+ s != SCM_EOL; s = gh_cdr (s))
{
- dy_f_drul_[d] = extrema[u]->stem_l_->height ()[dir_];
- dy_f_drul_[u] = extrema[u]->stem_l_->height ()[dir_];
+ SCM r = scm_eval (scm_listify (gh_caar (s),
+ this->self_scm_,
+ gh_int2scm ((int)dir),
+ SCM_UNDEFINED));
+ if (r != SCM_BOOL_F)
+ {
+ index_set_cell (get_elt_property ("attachment"), dir,
+ gh_cdar (s));
+ break;
+ }
}
}
- else if (extrema[d]->stem_l_ && !extrema[d]->stem_l_->transparent_b_)
- {
- dy_f_drul_[d] = (int)rint (extrema[d]->stem_l_->height ()[dir_]);
- dx_f_drul_[d] += 0.5 * nw_f - d * gap_f;
- if (dir_ == extrema[d]->stem_l_->dir_)
+ }
+ while (flip (&dir) != LEFT);
+}
+
+Offset
+Slur::get_attachment (Direction dir) const
+{
+ SCM s = get_elt_property ("attachment");
+ SCM a = dir == LEFT ? gh_car (s) : gh_cdr (s);
+ String str = ly_symbol2string (a);
+ Real ss = Staff_symbol_referencer_interface (this).staff_space ();
+ Real hs = ss / 2.0;
+ Offset o;
+ if (Note_column* n = dynamic_cast<Note_column*> (get_bound (dir)))
+ {
+ if (Stem* st = dynamic_cast<Stem*> (n->stem_l ()))
+ {
+ if (str == "head")
{
- if (dir_ == d)
- dx_f_drul_[d] += 0.5 * (dir_ * d) * d * nw_f;
- else
- dx_f_drul_[d] += 0.25 * (dir_ * d) * d * nw_f;
+ o = Offset (0, st->chord_start_f ());
+ /*
+ Default position is centered in X, on outer side of head Y
+ */
+ o += Offset (0.5 * n->extent (X_AXIS).length (),
+ 0.5 * ss * Directional_element_interface (this).get ());
+ }
+ else if (str == "alongside-stem")
+ {
+ o = Offset (0, st->chord_start_f ());
+ /*
+ Default position is on stem X, on outer side of head Y
+ */
+ o += Offset (n->extent (X_AXIS).length ()
+ * (1 + st->get_direction ()),
+ 0.5 * ss * Directional_element_interface (this).get ());
+ }
+ else if (str == "stem")
+ {
+ o = Offset (0, st->stem_end_position () * hs);
+ /*
+ Default position is on stem X, at stem end Y
+ */
+ o += Offset (0.5 *
+ (n->extent (X_AXIS).length ()
+ - st->extent (X_AXIS).length ())
+ * (1 + st->get_direction ()),
+ 0);
+ }
+ else if (str == "loose-end")
+ {
+ SCM other_a = dir == LEFT ? gh_cdr (s) : gh_car (s);
+ if (ly_symbol2string (other_a) != "loose-end")
+ {
+ o = Offset (0, get_attachment (-dir)[Y_AXIS]);
+ }
+ }
+
+
+ SCM l = scm_assoc
+ (scm_listify (a,
+ gh_int2scm (st->get_direction () * dir),
+ gh_int2scm (Directional_element_interface (this).get () * dir),
+ SCM_UNDEFINED),
+ scm_eval (ly_symbol2scm ("slur-extremity-offset-alist")));
+
+ if (l != SCM_BOOL_F)
+ {
+ o += ly_scm2offset (gh_cdr (l)) * ss * dir;
}
}
- else
- {
- dy_f_drul_[d] = (int)rint (extrema[d]->head_positions_interval ()
- [dir_])* inter_f;
- }
- dy_f_drul_[d] += dir_ * interline_f;
}
- while (flip(&d) != LEFT);
+
+
+ /*
+ URG
+ */
+
+ if (str != "loose-end")
+ {
+ Link_array<Note_column> encompass_arr =
+ Pointer_group_interface__extract_elements (this, (Note_column*)0,
+ "note-columns");
+ o -= Offset (0, calc_interstaff_dist (dir == LEFT ? encompass_arr[0]
+ : encompass_arr.top (), this));
+ }
+ return o;
+}
+
+int
+Slur::cross_staff_count ()const
+{
+ Link_array<Note_column> encompass_arr =
+ Pointer_group_interface__extract_elements (this, (Note_column*)0, "note-columns");
+
+ int k=0;
+
+ for (int i = 0; i < encompass_arr.size (); i++)
+ {
+ if (calc_interstaff_dist (encompass_arr[i], this))
+ k++;
+ }
+ return k;
}
+
Array<Offset>
Slur::get_encompass_offset_arr () const
{
- Real interline = paper ()->interline_f ();
- Real notewidth = paper ()->note_width ();
- Real internote = interline / 2;
+ Link_array<Note_column> encompass_arr =
+ Pointer_group_interface__extract_elements (this, (Note_column*)0, "note-columns");
+
+ Array<Offset> offset_arr;
- Stem* left_stem = encompass_arr_[0]->stem_l_;
- Real left_x = left_stem->hpos_f ();
- left_x += dx_f_drul_[LEFT];
+ Offset origin (relative_coordinate (0, X_AXIS), 0);
- Real left_y = dy_f_drul_[LEFT];
+ int first = 1;
+ int last = encompass_arr.size () - 2;
- Real dx = width ().length ();
- dx += (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT]);
- dx = dx <? 1000;
- dx = dx >? 2 * interline;
+ offset_arr.push (get_attachment (LEFT));
- Real dy = (dy_f_drul_[RIGHT] - dy_f_drul_[LEFT]);
- if (abs (dy) > 1000)
- dy = sign (dy) * 1000;
+ /*
+ left is broken edge
+ */
+ int cross_count = cross_staff_count ();
- int first = 1;
- int last = encompass_arr_.size () - 1;
- if (encompass_arr_[0] != spanned_drul_[LEFT])
+ /*
+ URG
+ */
+ bool cross_b = cross_count && cross_count < encompass_arr.size ();
+ if (encompass_arr[0] != get_bound (LEFT))
{
- first = 0;
- left_x = spanned_drul_[LEFT]->width ().length ();
- left_x -= 2 * notewidth;
-// left_y = 0;
- Stem* stem = encompass_arr_[last]->stem_l_;
- left_y = stem->dir_ == dir_ ? stem->stem_end_f ()
- : stem->stem_begin_f () + 0.5 * dir_;
- dy = 0;
+ first--;
+ Real is = calc_interstaff_dist (encompass_arr[0], this);
+ if (cross_b)
+ offset_arr[0][Y_AXIS] += is;
}
- if (encompass_arr_.top () != spanned_drul_[RIGHT])
+
+ /*
+ right is broken edge
+ */
+ if (encompass_arr.top () != get_bound (RIGHT))
{
- last += 1;
- dy = 0;
+ last++;
}
- Array<Offset> notes;
- notes.push (Offset (0,0));
- for (int i = first; i < last; i++)
+ for (int i = first; i <= last; i++)
{
- Stem* stem = encompass_arr_[i]->stem_l_;
- /*
- set x to middle of notehead or on exact x position of stem,
- according to slur direction
- */
- Real x = stem->hpos_f ();
+ Offset o (encompass_offset (encompass_arr[i]));
+ offset_arr.push (o - origin);
+ }
- if (stem->dir_ != dir_)
- x += 0.5 * notewidth;
- else if (stem->dir_ == UP)
- x += 1.0 * notewidth;
+ offset_arr.push (Offset (spanner_length (), 0) + get_attachment (RIGHT));
- x -= left_x;
+ return offset_arr;
+}
- Real y = stem->dir_ == dir_ ? stem->stem_end_f ()
- : stem->stem_begin_f () + 0.5 * dir_;
- /*
- leave a gap: slur mustn't touch head/stem
- */
- y += 2.5 * dir_;
+Array<Rod>
+Slur::get_rods () const
+{
+ Array<Rod> a;
+ Rod r;
+
+ r.item_l_drul_[LEFT] = get_bound (LEFT);
+ r.item_l_drul_[RIGHT] = get_bound (RIGHT);
+ r.distance_f_ = paper_l ()->get_var ("slur_x_minimum");
+
+ a.push (r);
+ return a;
+}
+
+
+/*
+ Ugh should have dash-length + dash-period
+ */
+GLUE_SCORE_ELEMENT(Slur,brew_molecule);
+SCM
+Slur::member_brew_molecule () const
+{
+ Real thick = paper_l ()->get_var ("slur_thickness");
+ Bezier one = get_curve ();
+
+ Molecule a;
+ SCM d = get_elt_property ("dashed");
+ if (gh_number_p (d))
+ a = lookup_l ()->dashed_slur (one, thick, thick * gh_scm2double (d));
+ else
+ a = lookup_l ()->slur (one, Directional_element_interface (this).get () * thick, thick);
- // ugh: huh?
- if (dir_ == DOWN)
- y += 1.5 * dir_;
+ return a.create_scheme();
+}
+
+void
+Slur::set_control_points ()
+{
+ Slur_bezier_bow bb (get_encompass_offset_arr (),
+ Directional_element_interface (this).get ());
- y *= internote;
- y -= left_y;
+ Real staff_space = Staff_symbol_referencer_interface (this).staff_space ();
+ Real h_inf = paper_l ()->get_var ("slur_height_limit_factor") * staff_space;
+ Real r_0 = paper_l ()->get_var ("slur_ratio");
- notes.push (Offset (x, y));
+ bb.set_default_bezier (h_inf, r_0);
+
+ if (bb.fit_factor () > 1.0)
+ {
+ Real length = bb.curve_.control_[3][X_AXIS];
+ Real default_height = bb.get_default_height (h_inf, r_0, length);
+ bb.minimise_enclosed_area (paper_l(), default_height);
+
+ Real bff = paper_l ()->get_var ("slur_force_blowfit");
+ bb.curve_.control_[1][Y_AXIS] *= bff;
+ bb.curve_.control_[2][Y_AXIS] *= bff;
+ bb.blow_fit ();
+
+ Real sb = paper_l ()->get_var ("slur_beautiful");
+ Real beautiful = length * default_height * sb;
+ Real area = bb.enclosed_area_f ();
+
+ /*
+ Slurs that fit beautifully are not ugly
+ */
+ if (area > beautiful)
+ de_uglyfy (&bb, default_height);
}
- notes.push (Offset (dx, dy));
+ Bezier b = bb.get_bezier ();
+
+
+ SCM controls = SCM_EOL;
+ for (int i= 4; i--;)
+ controls = gh_cons ( ly_offset2scm (b.control_[i]), controls);
+
+ set_elt_property ("control-points", controls);
+}
+
+
+Bezier
+Slur::get_curve () const
+{
+ Bezier b;
+ int i = 0;
- return notes;
+ if (!Directional_element_interface (this).get ()
+ || ! gh_symbol_p (index_cell (get_elt_property ("attachment"), LEFT)))
+ ((Slur*)this)->set_extremities ();
+
+ if (!gh_pair_p (get_elt_property ("control-points")))
+ ((Slur*)this)->set_control_points ();
+
+
+ for (SCM s= get_elt_property ("control-points"); s != SCM_EOL; s = gh_cdr (s))
+ {
+ b.control_[i] = ly_scm2offset (gh_car (s));
+ i++;
+ }
+
+ Array<Offset> enc (get_encompass_offset_arr ());
+ Direction dir = Directional_element_interface (this).get ();
+
+ Real x1 = enc[0][X_AXIS];
+ Real x2 = enc.top ()[X_AXIS];
+
+ Real off = 0.0;
+ for (int i=1; i < enc.size ()-1; i++)
+ {
+ Real x = enc[i][X_AXIS];
+ if (x > x1 && x <x2)
+ {
+ Real y = b.get_other_coordinate (X_AXIS, x);
+ off = off >? dir * (enc[i][Y_AXIS] - y);
+ }
+ }
+ b.translate (Offset (0, dir * off));
+ return b;
}
projects / lilypond.git / blobdiff