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>
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
/*
- TODO:
-
- think about crossing stems.
- Begin and end should be treated as a Script.
+ [TODO]
+ * begin and end should be treated as a/acknowledge Scripts.
+ * broken slur should have uniform trend
*/
+
+#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 "box.hh"
+#include "bezier.hh"
+#include "main.hh"
+#include "cross-staff.hh"
+#include "group-interface.hh"
-void
-Slur::add (Note_column*n)
+Slur::Slur ()
{
- encompass_arr_.push (n);
- add_dependency (n);
+ set_elt_property ("note-columns", SCM_EOL);
}
void
-Slur::set_default_dir ()
+Slur::add_column (Note_column*n)
+{
+ if (!gh_pair_p (n->get_elt_property ("note-heads")))
+ warning (_ ("Putting slur over rest. Ignoring."));
+ else
+ {
+ Group_interface gi (this, "note-columns");
+ gi.add_element (n);
+ add_dependency (n);
+ }
+}
+
+Direction
+Slur::get_default_dir () const
{
- dir_ = DOWN;
- for (int i=0; i < encompass_arr_.size (); i ++)
+ Link_array<Note_column> encompass_arr =
+ 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 ());
+ Link_array<Note_column> encompass_arr =
+ Group_interface__extract_elements (this, (Note_column*)0, "note-columns");
+ set_bounds (LEFT, encompass_arr[0]);
+ if (encompass_arr.size () > 1)
+ set_bounds (RIGHT, encompass_arr.top ());
}
void
// don't set directions
}
-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 (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->hpos_f ();
+ o[Y_AXIS] = col->extent (Y_AXIS)[dir];
+ return o;
}
-}
+ Direction stem_dir = directional_element (stem_l).get ();
+ o[X_AXIS] = stem_l->hpos_f ();
-static int
-Note_column_compare (Note_column *const&n1 , Note_column* const&n2)
-{
- return Item::left_right_compare (n1, n2);
+ /*
+ 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;
}
+/*
+ ARGRARGRARGRARGAR!
+
+ Fixme
+ */
void
Slur::do_post_processing ()
{
- encompass_arr_.sort (Note_column_compare);
- if (!dir_)
- set_default_dir ();
- Real interline_f = paper ()->interline_f ();
- Real inter_f = interline_f / 2;
+ Link_array<Note_column> encompass_arr =
+ Group_interface__extract_elements (this, (Note_column*)0, "note-columns");
+
+ if (!encompass_arr.size ())
+ {
+ set_elt_property ("transparent", SCM_BOOL_T);
+ set_empty (X_AXIS);
+ set_empty (Y_AXIS);
+ return;
+ }
+
+ if (!directional_element (this).get ())
+ directional_element (this).set (get_default_dir ());
/*
- [OSU]: slur and tie placement
+ Slur and tie placement [OSU]
- slurs:
- * x = centre of head (upside-down: inner raakpunt stem) - d * gap
+ Slurs:
+ * x = centre of head - d * x_gap_f
- * y = length < 5ss : horizontal raakpunt + d * 0.25 ss
+ TODO:
+ * y = length < 5ss : horizontal tangent + d * 0.25 ss
y = length >= 5ss : y next interline - d * 0.25 ss
- --> height <= 5 length ?? we use <= 3 length, now...
-
- * 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 ();
- Direction d=LEFT;
- Real nw_f = paper ()->note_width ();
-
+ Real staff_space = paper_l ()->get_var ("interline");
+ Real half_staff_space = staff_space / 2;
+
+ Real x_gap_f = paper_l ()->get_var ("slur_x_gap");
+ Real y_gap_f = paper_l ()->get_var ("slur_y_gap");
+
+ Drul_array<Note_column*> note_column_drul;
+ note_column_drul[LEFT] = encompass_arr[0];
+ note_column_drul[RIGHT] = encompass_arr.top ();
+
+ bool fix_broken_b = false;
+
+ Direction my_dir = directional_element (this).get ();
+
+ Direction d = LEFT;
do
{
- if (extrema[d] != spanned_drul_[d])
+ dx_f_drul_[d] = 0;
+ dy_f_drul_[d] = 0;
+
+ if ((note_column_drul[d] == spanned_drul_[d])
+ && note_column_drul[d]->first_head ()
+ && (note_column_drul[d]->stem_l ()))
{
- dx_f_drul_[d] = -d
- *(spanned_drul_[d]->width ().length () -0.5*nw_f);
+ Stem* stem_l = note_column_drul[d]->stem_l ();
+ /*
+ side directly attached to note head;
+ no beam getting in the way
+ */
+ if ((stem_l->extent (Y_AXIS).empty_b ()
+ || !((stem_l->get_direction () == my_dir) && (my_dir != d)))
+ && !((my_dir == stem_l->get_direction ())
+ && stem_l->beam_l () && (stem_l->beam_count (-d) >= 1)))
+ {
+ dx_f_drul_[d] = spanned_drul_[d]->extent (X_AXIS).length () / 2;
+ dx_f_drul_[d] -= d * x_gap_f;
+
+ if (stem_l->get_direction () != my_dir)
+ {
+ dy_f_drul_[d] = note_column_drul[d]->extent (Y_AXIS)[my_dir];
+ }
+ else
+ {
+ dy_f_drul_[d] = stem_l->chord_start_f ()
+ + my_dir * half_staff_space;
+ }
+ dy_f_drul_[d] += my_dir * y_gap_f;
+ }
+ /*
+ side attached to (visible) stem
+ */
+ else
+ {
+ dx_f_drul_[d] = stem_l->hpos_f ()
+ - spanned_drul_[d]->relative_coordinate (0, X_AXIS);
+ /*
+ side attached to beamed stem
+ */
+ if (stem_l->beam_l () && (stem_l->beam_count (-d) >= 1))
+ {
+ dy_f_drul_[d] = stem_l->extent (Y_AXIS)[my_dir];
+ dy_f_drul_[d] += my_dir * 2 * y_gap_f;
+ }
+ /*
+ side attached to notehead, with stem getting in the way
+ */
+ else
+ {
+ dx_f_drul_[d] -= d * x_gap_f;
+
+ dy_f_drul_[d] = stem_l->chord_start_f ()
+ + my_dir * half_staff_space;
+ dy_f_drul_[d] += my_dir * y_gap_f;
+ }
+ }
}
- else if (extrema[d]->stem_l_ && !extrema[d]->stem_l_->transparent_b_)
- {
- dy_f_drul_[d] = (int)rint (extrema[d]->stem_l_->height ()[dir_]);
- /* normal slur from notehead centre to notehead centre, minus gap */
- dx_f_drul_[d] += -d * gap_f;
+ /*
+ loose end
+ */
+ else
+ {
+ dx_f_drul_[d] = get_broken_left_end_align ();
+
+ /*
+ broken: should get y from other piece, so that slur
+ continues up/down trend
+
+ for now: be horizontal..
+ */
+ fix_broken_b = true;
}
- else
- {
- dy_f_drul_[d] = (int)rint (extrema[d]->head_positions_interval ()[dir_])* inter_f;
+ }
+ while (flip (&d) != LEFT);
+
+ int cross_count = cross_staff_count ();
+ bool interstaff_b = (0 < cross_count) && (cross_count < encompass_arr.size ());
+
+ Drul_array<Offset> info_drul;
+ Drul_array<Real> interstaff_interval;
+
+ do
+ {
+ info_drul[d] = encompass_offset (encompass_arr.boundary (d, 0));
+ interstaff_interval[d] = - calc_interstaff_dist (encompass_arr.boundary (d,0),
+ this);
+ }
+ while (flip (&d) != LEFT);
+
+ Real interstaff_f = interstaff_interval[RIGHT] - interstaff_interval[LEFT];
+
+ if (fix_broken_b)
+ {
+ Direction d = (encompass_arr.top () != spanned_drul_[RIGHT]) ?
+ RIGHT : LEFT;
+ dy_f_drul_[d] = info_drul[d][Y_AXIS];
+ if (!interstaff_b)
+ {
+ dy_f_drul_[d] -= interstaff_interval[d];
+ if (cross_count) // interstaff_i ?
+ {
+ dy_f_drul_[LEFT] += interstaff_interval[d];
+ dy_f_drul_[RIGHT] += interstaff_interval[d];
+ }
}
- dy_f_drul_[d] += dir_ * interline_f;
}
- while ((d *= -1) != LEFT);
-}
+
-Real
-Slur::height_f () const
-{
/*
- rather braindead way that of adjusting slur height
- for heads/stems that extend beyond default slur
- works quite good
+ Now we've got a fine slur
+ Catch and correct some ugly cases
*/
+ String infix = interstaff_b ? "interstaff_" : "";
+ Real height_damp_f = paper_l ()->get_var ("slur_"+infix +"height_damping");
+ Real slope_damp_f = paper_l ()->get_var ("slur_"+infix +"slope_damping");
+ Real snap_f = paper_l ()->get_var ("slur_"+infix +"snap_to_stem");
+ Real snap_max_dy_f = paper_l ()->get_var ("slur_"+infix +"snap_max_slope_change");
+
+ if (!fix_broken_b)
+ dy_f_drul_[RIGHT] += interstaff_f;
+
+ Real dy_f = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
+ if (!fix_broken_b)
+ dy_f -= interstaff_f;
+ Real dx_f = spanner_length ()+ dx_f_drul_[RIGHT] - dx_f_drul_[LEFT];
- Real interline_f = paper ()->interline_f ();
- Real nh_f = interline_f / 2;
- Real h = 0;
- Real dx = width ().length ();
- Real dy = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
- Stem* stem = encompass_arr_[0]->stem_l_;
- Real lx = stem->hpos_f ();
- Real centre = (width ().min () + width ().max ()) / 2;
- Real ly = stem->dir_ == dir_ ? stem->stem_end_f () : stem->stem_begin_f ()
- + dir_ * nh_f / 2;
- for (int i = 0; i < encompass_arr_.size (); i++)
- {
- Stem* stem = encompass_arr_[i]->stem_l_;
- Real sx = abs (centre - stem->hpos_f ());
- Real sy = stem->dir_ == dir_ ? stem->stem_end_f ()
- : stem->stem_begin_f () + dir_ * nh_f / 2;
- sy = dir_ * (sy - (ly + ((stem->hpos_f () - lx) / dx) * dy));
+ /*
+ Avoid too steep slurs.
+ */
+ Real slope_ratio_f = abs (dy_f / dx_f);
+ if (slope_ratio_f > slope_damp_f)
+ {
+ Direction d = (Direction)(- my_dir * (sign (dy_f)));
+ if (!d)
+ d = LEFT;
+ Real damp_f = (slope_ratio_f - slope_damp_f) * dx_f;
/*
- uhm, correct for guess bezier curve (more if further from centre)
- forget the cos alpha...
+ must never change sign of dy
*/
- if (sy > 0)
- h = h >? sy * (1 + 2 * sx / dx);
+ damp_f = damp_f <? abs (dy_f);
+ dy_f_drul_[d] += my_dir * damp_f;
}
- Real ratio = 1.0/3; // duh
- /*
- correct h for slur ratio
+
+ /*
+ Avoid too high slurs
+
+ Wierd slurs may look a lot better after they have been
+ adjusted a bit.
+ So, we'll do this in 3 steps
*/
- Real staffheight = paper ()->get_var ("barsize");
- if (h)
- h *= ((h * interline_f) / dx ) / ratio;
- return h;
+ for (int i = 0; i < 3; i++)
+ {
+ Real height_f = curve_extent (Y_AXIS).length ();
+ Real width_f = curve_extent (X_AXIS).length ();
+
+ dy_f = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
+ if (!fix_broken_b)
+ dy_f -= interstaff_f;
+
+ Real height_ratio_f = abs (height_f / width_f);
+ if (height_ratio_f > height_damp_f)
+ {
+ Direction d = (Direction)(- my_dir * (sign (dy_f)));
+ if (!d)
+ d = LEFT;
+ /* take third step */
+ Real damp_f = (height_ratio_f - height_damp_f) * width_f / 3;
+ /*
+ if y positions at about the same height, correct both ends
+ */
+ if (abs (dy_f / dx_f ) < slope_damp_f)
+ {
+ dy_f_drul_[-d] += my_dir * damp_f;
+ dy_f_drul_[d] += my_dir * damp_f;
+ }
+ /*
+ don't change slope too much, would have been catched by slope damping
+ */
+ else
+ {
+ damp_f = damp_f <? abs (dy_f/2);
+ dy_f_drul_[d] += my_dir * damp_f;
+ }
+ }
+ }
+
+ /*
+ If, after correcting, we're close to stem-end...
+ */
+ Drul_array<Real> snapy_f_drul;
+ snapy_f_drul[LEFT] = snapy_f_drul[RIGHT] = 0;
+ Drul_array<Real> snapx_f_drul;
+ snapx_f_drul[LEFT] = snapx_f_drul[RIGHT] = 0;
+ Drul_array<bool> snapped_b_drul;
+ snapped_b_drul[LEFT] = snapped_b_drul[RIGHT] = false;
+ do
+ {
+ Note_column * nc = note_column_drul[d];
+ if (nc == spanned_drul_[d]
+ && nc->stem_l ()
+ && nc->stem_l ()->get_direction () == my_dir
+ && abs (nc->stem_l ()->extent (Y_AXIS)[my_dir]
+ - dy_f_drul_[d] + (d == LEFT ? 0 : interstaff_f))
+ <= snap_f)
+ {
+ /*
+ prepare to attach to stem-end
+ */
+ snapx_f_drul[d] = nc->stem_l ()->hpos_f ()
+ - spanned_drul_[d]->relative_coordinate (0, X_AXIS);
+
+ snapy_f_drul[d] = nc->stem_l ()->extent (Y_AXIS)[my_dir]
+ + interstaff_interval[d]
+ + my_dir * 2 * y_gap_f;
+
+ snapped_b_drul[d] = true;
+ }
+ }
+ while (flip (&d) != LEFT);
+
+ /*
+ only use snapped positions if sign (dy) will not change
+ and dy doesn't change too much
+ */
+ if (!fix_broken_b)
+ dy_f += interstaff_f;
+
+
+ /*
+ (sigh)
+
+ More refactoring could be done.
+ */
+ Real maxsnap = abs (dy_f * snap_max_dy_f);
+ if (snapped_b_drul[LEFT] && snapped_b_drul[RIGHT]
+ && ((sign (snapy_f_drul[RIGHT] - snapy_f_drul[LEFT]) == sign (dy_f)))
+ && (!dy_f || (abs (snapy_f_drul[RIGHT] - snapy_f_drul[LEFT] - dy_f)
+ < maxsnap)))
+ {
+ dy_f_drul_ = snapy_f_drul;
+ dx_f_drul_ = snapx_f_drul;
+ }
+ else
+ do
+ {
+ Direction od = (Direction)-d;
+ if (snapped_b_drul[d]
+ && d * sign (snapy_f_drul[d] - dy_f_drul_[od]) == sign (dy_f)
+ && (!dy_f || (abs (snapy_f_drul[d] - dy_f_drul_[od] - d * dy_f)
+ < maxsnap)))
+ {
+ dy_f_drul_[d] = snapy_f_drul[d];
+ dx_f_drul_[d] = snapx_f_drul[d];
+ }
+ }
+ while (flip (&d) != LEFT);
+}
+
+
+int
+Slur::cross_staff_count ()const
+{
+ Link_array<Note_column> encompass_arr =
+ 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;
}
-IMPLEMENT_IS_TYPE_B1(Slur,Spanner);
+
+Array<Offset>
+Slur::get_encompass_offset_arr () const
+{
+ Link_array<Note_column> encompass_arr =
+ Group_interface__extract_elements (this, (Note_column*)0, "note-columns");
+
+ Array<Offset> offset_arr;
+#if 0
+ /*
+ check non-disturbed slur
+ FIXME: x of ends off by a tiny bit!!
+ */
+ offset_arr.push (Offset (0, dy_f_drul_[LEFT]));
+ offset_arr.push (Offset (0, dy_f_drul_[RIGHT]));
+ return offset_arr;
+#endif
+
+ Offset origin (relative_coordinate (0, X_AXIS), 0);
+
+ int first = 1;
+ int last = encompass_arr.size () - 2;
+
+ offset_arr.push (Offset (dx_f_drul_[LEFT], dy_f_drul_[LEFT]));
+
+ /*
+ left is broken edge
+ */
+
+ int cross_count = cross_staff_count ();
+ bool cross_b = cross_count && cross_count < encompass_arr.size ();
+ if (encompass_arr[0] != spanned_drul_[LEFT])
+ {
+ first--;
+ Real is = calc_interstaff_dist (encompass_arr[0], this);
+ if (cross_b)
+ offset_arr[0][Y_AXIS] += is;
+ }
+
+ /*
+ right is broken edge
+ */
+ if (encompass_arr.top () != spanned_drul_[RIGHT])
+ {
+ last++;
+ }
+
+ for (int i = first; i <= last; i++)
+ {
+ Offset o (encompass_offset (encompass_arr[i]));
+ offset_arr.push (o - origin);
+ }
+
+ offset_arr.push (Offset (spanner_length ()+ dx_f_drul_[RIGHT],
+ dy_f_drul_[RIGHT]));
+
+ return offset_arr;
+}
+
+
+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;
+}
+
+