/*
+ slur.cc -- implement Slur
- TODO:
- think about crossing stems.
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1996, 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
+*/
+
+/*
+ [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 "notehead.hh"
-#include "pcol.hh"
+#include "note-column.hh"
+#include "stem.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"
+Slur::Slur ()
+{
+ set_elt_property ("note-columns", SCM_EOL);
+}
+void
+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);
+ }
+}
-Slur::Slur()
+Direction
+Slur::get_default_dir () const
{
- open_right=open_left=false;
+ 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)
+ {
+ d = UP;
+ break;
+ }
+ }
+ return d;
}
+void
+Slur::do_add_processing ()
+{
+ 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
+Slur::do_pre_processing ()
+{
+ // don't set directions
+}
+
+
Offset
-Slur::center() const
+Slur::encompass_offset (Note_column const* col) const
{
- int pos1 = encompass.top()->position;
- int pos2 = encompass[0]->position;
+ Offset o;
+ Stem* stem_l = col->stem_l ();
+ Direction dir = directional_element (this).get ();
+
+ if (!stem_l)
+ {
+ 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 ();
- int dy = pos1-pos2;
+ /*
+ Simply set x to middle of notehead
+ */
- Real w = width().length();
+ o[X_AXIS] -= 0.5 * stem_dir * col->extent (X_AXIS).length ();
- return Offset(w/2,dy * paper()->internote());
-}
+ 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];
+ }
-void
-Slur::add(Notehead*n)
-{
- encompass.push(n);
- add_dependency(n);
+ /*
+ 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::set_default_dir()
+Slur::do_post_processing ()
{
- int sumpos=0;
- for (int i=0; i < encompass.size(); i ++) {
- sumpos += encompass[i]->position;
+ 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 ());
+
+ /*
+ Slur and tie placement [OSU]
+
+ Slurs:
+ * x = centre of head - d * x_gap_f
+
+ TODO:
+ * y = length < 5ss : horizontal tangent + d * 0.25 ss
+ y = length >= 5ss : y next interline - d * 0.25 ss
+ */
+
+ 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
+ {
+ 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 ()))
+ {
+ 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;
+ }
+ }
+ }
+ /*
+ 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;
+ }
+ }
+ 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];
+ }
+ }
+ }
+
+
+ /*
+ 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];
+
+ /*
+ 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;
+ /*
+ must never change sign of dy
+ */
+ damp_f = damp_f <? abs (dy_f);
+ dy_f_drul_[d] += my_dir * damp_f;
+ }
+
+ /*
+ 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
+ */
+ 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;
+
- /* should consult stems */
- Real meanpos = sumpos/Real(encompass.size());
- if (meanpos < 5) // todo
- dir_i_ = -1;
- else
- dir_i_ = 1;
+ /*
+ (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);
}
-void
-Slur::do_pre_processing()
+
+int
+Slur::cross_staff_count ()const
{
- right = encompass.top()->pcol_l_;
- left = encompass[0]->pcol_l_;
+ 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;
}
-Spanner*
-Slur::do_break_at(PCol*l, PCol*r) const
+
+Array<Offset>
+Slur::get_encompass_offset_arr () const
{
- assert(l->line_l_ == r->line_l_);
- Slur*ret = new Slur(*this);
+ 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]));
- 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]);
+ /*
+ 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;
}
- if (right != r)
- ret->open_right = true;
- if (left != l)
- ret->open_left = true;
+ /*
+ right is broken edge
+ */
+ if (encompass_arr.top () != spanned_drul_[RIGHT])
+ {
+ last++;
+ }
- return ret;
-}
+ for (int i = first; i <= last; i++)
+ {
+ Offset o (encompass_offset (encompass_arr[i]));
+ offset_arr.push (o - origin);
+ }
-void
-Slur::do_post_processing()
-{
- if (!dir_i_)
- set_default_dir();
+ offset_arr.push (Offset (spanner_length ()+ dx_f_drul_[RIGHT],
+ dy_f_drul_[RIGHT]));
+
+ return offset_arr;
}
-Molecule*
-Slur::brew_molecule_p() const
+
+Array<Rod>
+Slur::get_rods () const
{
- Molecule*output = new Molecule;
-
- int minp=1000, maxp=-1000; // todo
- for (int i=0; i<encompass.size(); i++) {
- minp = encompass[i]->position <? minp;
- maxp = encompass[i]->position >? maxp;
- }
- assert(encompass.size()>0); // todo
-
- Notehead *lnote_p =encompass[0];
- Notehead *rnote_p =encompass.top();
- int lpos_i = lnote_p->position;
- int rpos_i = rnote_p->position;
- Offset left_off(lnote_p->x_dir, lpos_i + 2*dir_i_);
- Offset right_off(lnote_p->x_dir, rpos_i + 2*dir_i_);
- if (!lnote_p->extremal)
- left_off += Offset(0.5, -dir_i_);
- if (!rnote_p->extremal)
- 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_p_->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;
+ 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;
}
+
projects / lilypond.git / blobdiff