source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
+#include <math.h>
+
+#include "spanner.hh"
+#include "lookup.hh"
#include "paper-def.hh"
#include "tie.hh"
-#include "note-head.hh"
+#include "rhythmic-head.hh"
+#include "bezier.hh"
#include "paper-column.hh"
#include "debug.hh"
+#include "staff-symbol-referencer.hh"
+#include "directional-element-interface.hh"
+#include "molecule.hh"
+#include "bezier-bow.hh"
+#include "stem.hh"
+#include "note-head.hh"
+
+/*
+ tie: Connect two noteheads.
+
+ What if we have
+
+ c4 ~ \clef bass ; c4 or
+ c4 \staffchange c4
+ do we have non-horizontal ties then?
+ */
+
+
+void
+Tie::set_head (Grob*me,Direction d, Item * head_l)
+{
+ assert (!head (me,d));
+ index_set_cell (me->get_grob_property ("heads"), d, head_l->self_scm ());
+
+ dynamic_cast<Spanner*> (me)->set_bound (d, head_l);
+ me->add_dependency (head_l);
+}
void
-Tie::set_head (Direction d, Note_head * head_l)
+Tie::set_interface (Grob*me)
{
- assert (!head_l_drul_[d]);
- head_l_drul_[d] = head_l;
- set_bounds (d, head_l);
+ me->set_grob_property ("heads", gh_cons (SCM_EOL, SCM_EOL));
+ me->set_interface (ly_symbol2scm ("tie-interface"));
+}
- add_dependency (head_l);
+bool
+Tie::has_interface (Grob*me)
+{
+ return me->has_interface (ly_symbol2scm ("tie-interface"));
}
-Tie::Tie()
+Grob*
+Tie::head (Grob*me, Direction d)
{
- head_l_drul_[RIGHT] =0;
- head_l_drul_[LEFT] =0;
+ SCM c = me->get_grob_property ("heads");
+ c = index_cell (c, d);
+
+ return unsmob_grob (c);
+}
+
+Real
+Tie::position_f (Grob*me)
+{
+ Direction d = head (me,LEFT) ? LEFT:RIGHT;
+ return Staff_symbol_referencer::position_f (head (me,d));
}
/*
- ugh: direction of the Tie is more complicated. See [Ross] p136 and further
- */
+ Default: Put the tie oppositie of the stem [Wanske p231]
+
+ In case of chords: Tie_column takes over
+
+ The direction of the Tie is more complicated (See [Ross] p136 and
+ further).
+*/
Direction
-Tie::get_default_dir () const
+Tie::get_default_dir (Grob*me)
{
- int m = (head_l_drul_[LEFT]->position_i_
- + head_l_drul_[RIGHT]->position_i_) /2;
+ Item * sl = head(me,LEFT) ? Rhythmic_head::stem_l (head (me,LEFT)) :0;
+ Item * sr = head(me,RIGHT) ? Rhythmic_head::stem_l (head (me,RIGHT)) :0;
+
+ if (sl && sr)
+ {
+ if (Directional_element_interface::get (sl) == UP
+ && Directional_element_interface::get (sr) == UP)
+ return DOWN;
+ }
+ else if (sl || sr)
+ {
+ Item *s = sl ? sl : sr;
+ return - Directional_element_interface::get (s);
+ }
+
+
+ return UP;
+}
+
+
+SCM
+Tie::get_control_points (SCM smob)
+{
+ Spanner*me = dynamic_cast<Spanner*> (unsmob_grob (smob));
+ Direction headdir = CENTER;
+ if (head (me,LEFT))
+ headdir = LEFT;
+ else if (head(me,RIGHT))
+ headdir = RIGHT;
+ else
+ {
+ programming_error ("Tie without heads.");
+ me->suicide ();
+ return SCM_UNSPECIFIED;
+ }
+
+ if (!Directional_element_interface::get (me))
+ Directional_element_interface::set (me, Tie::get_default_dir (me));
+
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
+
+ Real x_gap_f = gh_scm2double (me->get_grob_property ("x-gap"));
+
+ Grob* l = me->get_bound (LEFT);
+ Grob* r = me->get_bound (RIGHT);
+
+ Grob* commonx = me->common_refpoint (l, X_AXIS);
+ commonx = me->common_refpoint (r, X_AXIS);
+
+ Real left_x;
/*
- If dir is not determined: inverse of stem: down
- (see stem::get_default_dir ())
+ this is a kludge: the tie has to be long enough to be
+ visible, but should not go through key sigs.
+
+ (please fixme)
*/
- Direction neutral_dir = (Direction)(int)paper_l ()->get_var ("stem_default_neutral_direction");
- return (m == 0) ? other_dir (neutral_dir) : (m < 0) ? DOWN : UP;
-}
+ Real lambda = 0.5;
+
+ if (Note_head::has_interface (me->get_bound (LEFT)))
+ left_x = l->extent (l, X_AXIS)[RIGHT] + x_gap_f;
+ else
+ left_x = l->extent (l, X_AXIS).linear_combination (lambda);
+
-void
-Tie::do_add_processing()
-{
- if (!(head_l_drul_[LEFT] && head_l_drul_[RIGHT]))
- warning (_ ("lonely tie"));
-
- Direction d = LEFT;
- Drul_array<Note_head *> new_head_drul = head_l_drul_;
- do {
- if (!head_l_drul_[d])
- new_head_drul[d] = head_l_drul_[(Direction)-d];
- } while (flip(&d) != LEFT);
- head_l_drul_ = new_head_drul;
-}
+ Real width;
+ if (Note_head::has_interface (me->get_bound (LEFT))
+ && Note_head::has_interface (me->get_bound (RIGHT)))
+ {
+ width =
+ + r->extent (commonx,X_AXIS)[LEFT]
+ - l->extent (commonx, X_AXIS)[RIGHT]
+ -2 * x_gap_f;
+ }
+ else
+ {
+ if (Note_head::has_interface (me->get_bound (LEFT)))
+ width = r->relative_coordinate (commonx, X_AXIS)
+ - l->extent (commonx, X_AXIS)[RIGHT]
+ - 2 * x_gap_f;
+ else
+ width =
+ - l->extent (commonx, X_AXIS).linear_combination (lambda)
+ + r->extent (commonx, X_AXIS)[LEFT]
+ - 2 * x_gap_f;
+ }
+
+ Direction dir = Directional_element_interface::get(me);
-void
-Tie::do_post_processing()
-{
- assert (head_l_drul_[LEFT] || head_l_drul_[RIGHT]);
+ SCM details = me->get_grob_property ("details");
+
+ SCM lim // groetjes aan de chirurgendochter.
+ = scm_assq (ly_symbol2scm ("height-limit"),details);
+
+ Real h_inf = gh_scm2double (gh_cdr (lim)) * staff_space;
+ Real r_0 = gh_scm2double (gh_cdr (scm_assq (ly_symbol2scm ("ratio"),details)));
- Real interline_f = paper_l ()->get_realvar (interline_scm_sym);
- Real internote_f = interline_f / 2;
- Real x_gap_f = paper_l ()->get_var ("tie_x_gap");
- Real y_gap_f = paper_l ()->get_var ("tie_y_gap");
+ Bezier b = slur_shape (width, h_inf, r_0);
+
+ Offset leave_dir = b.control_[1] - b.control_[0];
+
+ Grob *hed =head (me, headdir);
+ Real dx = (hed->extent (hed, X_AXIS).length () + x_gap_f)/2.0;
+ Real max_gap = leave_dir[Y_AXIS] * dx / leave_dir[X_AXIS];
- /*
- Slur and tie placement [OSU]
+ /*
+ for small ties (t small) we want to start in the Y-center (so dy = 0), for
+ large ties, the tie should appear to come from the center of the
+ head, so dy = max_gap
- Ties:
+ maybe use a different formula?
- * x = inner vertical tangent - d * gap
+ TODO: what if 2 heads have different size.
+ TODO: for small ties, it is better to start over the heads
+ iso. next to the heads.
+ */
+ Real t = (width / staff_space - 5.0); // ugh.
+ Real dy = t > 0 ? max_gap * sqr (t / (1 + t)) : 0.0;
+
+ Real ypos = Tie::position_f (me) * staff_space/2 + dir * dy;
+
+ /*
+ todo: prevent ending / staffline collision.
+
+ todo: tie / stem collision
*/
+ b = slur_shape(width,h_inf, r_0);
+ b.scale (1, dir);
+ b.translate (Offset (left_x, ypos));
+
/*
- OSU: not different for outer notes, so why all this code?
- ie, can we drop this, or should it be made switchable.
+ Avoid colliding of the horizontal part with stafflines.
+
+
+ TODO: redo this, heuristic is half-baken, and ties often look ugly
+ as a result.
+
+ TODO: doesn't work when on staff with even number of lines.
*/
-#if 0
- Direction d = LEFT;
- do
+ Array<Real> horizontal (b.solve_derivative (Offset (1,0)));
+ if (horizontal.size ())
{
- Real head_width_f = head_l_drul_[d]
- ? head_l_drul_[d]->extent (X_AXIS).length ()
- : 0;
/*
- side attached to outer (upper or lower) notehead of chord
- */
- if (head_l_drul_[d]
- /*
- && head_l_drul_[d]->remove_elt_property (extremal_scm_sym) != SCM_BOOL_F)
- ugh, ugh:
+ ugh. Doesnt work for non-horizontal curves.
+ */
+ Real y = b.curve_point (horizontal[0])[Y_AXIS];
- a~a~a;
+ Real ry = rint (y/staff_space) * staff_space;
+ Real diff = ry - y;
+ Real newy = y;
- to second tie, middle notehead seems not extremal
+ Real clear = staff_space * gh_scm2double (me->get_grob_property ("staffline-clearance"));
- Getting scared a bit by score-element's comment:
- // is this a good idea?
- */
- && (head_l_drul_[d]->get_elt_property (extremal_scm_sym)
- != SCM_BOOL_F))
- {
- if (d == LEFT)
- dx_f_drul_[d] += head_width_f;
- dx_f_drul_[d] += -d * x_gap_f;
- }
- /*
- side attached to inner notehead
- */
- else
+ if (fabs (y) <= Staff_symbol_referencer::staff_radius (me)
+ && fabs (diff) < clear)
{
- dx_f_drul_[d] += -d * head_width_f;
- }
- } while (flip (&d) != LEFT);
+ Real y1 = ry + clear;
+ Real y2 = ry - clear;
+
+ newy = (fabs (y1 - y) < fabs (y2 - y)) ? y1 : y2;
+
+ // newy = ry - 0.5 * staff_space * sign (diff) ;
-#else
+ /*
+ we don't want horizontal ties
+ */
+ if (fabs (newy - b.control_[0][Y_AXIS]) < 1e-2)
+ {
+ newy = newy + dir * staff_space;
+ }
+ }
- if (head_l_drul_[LEFT])
- dx_f_drul_[LEFT] = head_l_drul_[LEFT]->extent (X_AXIS).length ();
+ Real y0 = b.control_ [0][Y_AXIS];
+ b.control_[2][Y_AXIS] =
+ b.control_[1][Y_AXIS] =
+ (b.control_[1][Y_AXIS] - y0) * ((newy - y0) / (y - y0)) + y0;
+ }
else
- dx_f_drul_[LEFT] = spanned_drul_[LEFT]->extent (X_AXIS).length ();
- dx_f_drul_[LEFT] += x_gap_f;
- dx_f_drul_[RIGHT] -= x_gap_f;
+ programming_error ("Tie is nowhere horizontal");
-#endif
- /*
- Slur and tie placement [OSU] -- check this
- Ties:
-
- * y = dx < 5ss: horizontal tangent
- y = dx >= 5ss: y next interline - d * 0.25 ss
-
- which probably means that OSU assumes that
+ SCM controls = SCM_EOL;
+ for (int i= 4; i--;)
+ controls = gh_cons ( ly_offset2scm (b.control_[i]), controls);
+ return controls;
+}
- dy <= 5 dx
+MAKE_SCHEME_CALLBACK(Tie,set_spacing_rods,1);
- for smal slurs
- */
+/*
+ TODO: set minimum distances for begin/end of line
+ */
+SCM
+Tie::set_spacing_rods (SCM smob)
+{
+ Grob*me = unsmob_grob (smob);
+ Spanner*sp = dynamic_cast<Spanner*> (me);
+ Rod r;
- int ypos_i = head_l_drul_[LEFT] ? head_l_drul_[LEFT]->position_i_
- : head_l_drul_[RIGHT]->position_i_;
+ r.item_l_drul_ [LEFT]=sp->get_bound (LEFT);
+ r.item_l_drul_ [RIGHT]=sp->get_bound (RIGHT);
+
+ r.distance_f_
+ = gh_scm2double (me->get_grob_property ("minimum-length"))
+ * 1.0;
+ r.add_to_cols ();
+ return SCM_UNSPECIFIED;
+}
- Real y_f = internote_f * ypos_i;
+MAKE_SCHEME_CALLBACK(Tie,brew_molecule,1);
+SCM
+Tie::brew_molecule (SCM smob)
+{
+ Grob*me = unsmob_grob (smob);
- Real dx_f = extent (X_AXIS).length () + dx_f_drul_[RIGHT] - dx_f_drul_[LEFT];
- if (dx_f < paper_l ()->get_var ("tie_staffspace_length"))
+ SCM cp = me->get_grob_property ("control-points");
+ if (cp == SCM_EOL)
{
- if (abs (ypos_i) % 2)
- y_f += dir_ * internote_f;
- y_f += dir_ * y_gap_f;
+ cp = get_control_points (smob);
+ me->set_grob_property ("control-points", cp);
}
- else
+
+ Real thick =
+ gh_scm2double (me->get_grob_property ("thickness"))
+ * me->paper_l ()->get_var ("stafflinethickness");
+
+ Bezier b;
+ int i = 0;
+ for (SCM s= cp; s != SCM_EOL; s = gh_cdr (s))
{
- if (! (abs (ypos_i) % 2))
- y_f += dir_ * internote_f;
- y_f += dir_ * internote_f;
- y_f -= dir_ * y_gap_f;
+ b.control_[i] = ly_scm2offset (gh_car (s));
+ i++;
}
- dy_f_drul_[LEFT] = dy_f_drul_[RIGHT] = y_f;
-}
-
-void
-Tie::do_substitute_element_pointer (Score_element*o, Score_element*n)
-{
- Note_head *new_l = n ? dynamic_cast<Note_head *> (n) : 0;
- if (dynamic_cast <Item *> (o) == head_l_drul_[LEFT])
- head_l_drul_[LEFT] = new_l;
- else if (dynamic_cast <Item *> (o) == head_l_drul_[RIGHT])
- head_l_drul_[RIGHT] = new_l;
+ Molecule a = Lookup::slur (b, Directional_element_interface::get (me) * thick, thick);
+
+ return a.smobbed_copy ();
}
-Array<Rod>
-Tie::get_rods () const
-{
- Array<Rod> a;
- Rod r;
- r.item_l_drul_ = spanned_drul_;
- r.distance_f_ = paper_l ()->get_var ("tie_x_minimum");
- a.push (r);
- return a;
-}
projects / lilypond.git / blobdiff