source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
+#include <math.h>
+
+#include "spanner.hh"
+#include "lookup.hh"
#include "paper-def.hh"
#include "tie.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"
-#include "p-col.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 (int x_pos, Note_head * head_l)
+Tie::set_head (Grob*me,Direction d, Item * head_l)
{
- if (x_pos >0)
- {
- assert (!right_head_l_);
- right_head_l_ = head_l;
- }
- else
- {
- assert (!left_head_l_);
- left_head_l_ = head_l;
- }
- add_dependency (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);
}
-Tie::Tie()
+void
+Tie::set_interface (Grob*me)
{
- right_head_l_ =0;
- left_head_l_ =0;
- same_pitch_b_ =false;
+ me->set_grob_property ("heads", gh_cons (SCM_EOL, SCM_EOL));
}
-void
-Tie::set_default_dir()
+
+Grob*
+Tie::head (Grob*me, Direction d)
{
- int m= (left_head_l_->position_i_ + right_head_l_->position_i_) /2 ;
- dir_i_ = (m < 5)? -1:1; // ugh
+ SCM c = me->get_grob_property ("heads");
+ c = index_cell (c, d);
+
+ return unsmob_grob (c);
}
-
-void
-Tie::do_add_processing()
+Real
+Tie::position_f (Grob*me)
{
- assert (left_head_l_ && right_head_l_);
- left_col_l_ = left_head_l_ -> pcol_l_;
- right_col_l_ = right_head_l_ -> pcol_l_;
+ Direction d = head (me,LEFT) ? LEFT:RIGHT;
+ return Staff_symbol_referencer::position_f (head (me,d));
}
-/**
- This is already getting hairy. Should use Note_head *heads[2]
- */
-void
-Tie::do_post_processing()
+
+/*
+ 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 (Grob*me)
{
- assert (left_head_l_ || right_head_l_);
- left_pos_i_ = (left_head_l_)?
- left_head_l_->position_i_ : right_head_l_->position_i_;
- right_pos_i_ = (right_head_l_) ?
- right_head_l_->position_i_ : left_head_l_->position_i_;
-
- if ( right_head_l_ && right_head_l_->extremal_i_)
+ 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)
{
- right_pos_i_ += 2*dir_i_;
- right_dx_f_ -= 0.25;
+ Item *s = sl ? sl : sr;
+ return - Directional_element_interface::get (s);
}
+
+
+ return UP;
+}
+
+
+SCM
+Tie::get_control_points (SCM smob)
+{
+ Spanner*me = unsmob_spanner (smob);
+ Direction headdir = CENTER;
+ if (head (me,LEFT))
+ headdir = LEFT;
+ else if (head (me,RIGHT))
+ headdir = RIGHT;
else
- right_dx_f_ -= 0.5;
+ {
+ programming_error ("Tie without heads.");
+ me->suicide ();
+ return SCM_UNSPECIFIED;
+ }
- if (left_head_l_ && left_head_l_->extremal_i_)
+
+ if (!Directional_element_interface::get (me))
+ Directional_element_interface::set (me, Tie::get_default_dir (me));
+ Direction dir = Directional_element_interface::get (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;
+
+ /*
+ the tie has to be long enough to be visible, but should not go
+ through key sigs. In the 1.5 series the pref.matter - note
+ distance is fixed , so this won't be a problem anymore.
+ */
+ Real lambda = 0.9;
+
+ if (Note_head::has_interface (l))
{
- left_pos_i_ += 2*dir_i_;
- left_dx_f_ += 0.25;
+ Real where = RIGHT;
+
+ /*
+ This correction is due te the shape of the black note head.
+ */
+ if (Rhythmic_head::duration_log (l) == 2)
+ where += dir* 0.2;
+ left_x = l->extent (l, X_AXIS).linear_combination (where)
+ + x_gap_f;
}
else
- left_dx_f_ += 0.5;
+ left_x = l->extent (l, X_AXIS).linear_combination (lambda);
- if (!right_head_l_)
- right_pos_i_ = left_pos_i_;
- if (! left_head_l_)
- left_pos_i_ = right_pos_i_;
-}
+ Real width;
+ if (Note_head::has_interface (l) && Note_head::has_interface (r))
+ {
+ width =
+ + r->extent (commonx,X_AXIS)[LEFT]
+ - l->extent (commonx, X_AXIS)[RIGHT]
+ -2 * x_gap_f;
+ }
+ else
+ {
+ if (Note_head::has_interface (l))
+ 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;
+ }
+
-void
-Tie::do_substitute_dependency (Score_elem*o, Score_elem*n)
+ 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 (ly_cdr (lim)) * staff_space;
+ Real r_0 = gh_scm2double (ly_cdr (scm_assq (ly_symbol2scm ("ratio"),details)));
+
+ Bezier b = slur_shape (width, h_inf, r_0);
+
+ /*
+ I think this better, particularly for small ties. It always allows the user to move ties if
+ they seem in the wrong place
+
+ TODO: what if 2 heads have different size.
+
+ */
+
+ Real ypos = Tie::position_f (me) * staff_space/2
+ + dir * gh_scm2double (me->get_grob_property ("y-offset"));;
+
+ /*
+ Make sure we don't start on a dots
+ */
+ if (Note_head::has_interface (l) && Rhythmic_head::dots_l (l))
+ {
+ Grob* dots = Rhythmic_head::dots_l(l);
+ if(fabs (staff_space * Staff_symbol_referencer::position_f (dots) /2
+ - ypos) < 0.5)
+ {
+ ypos += 0.5 * dir ;
+ }
+ }
+
+
+ /*
+ 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));
+
+
+ /*
+ 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.
+ */
+ Array<Real> horizontal (b.solve_derivative (Offset (1,0)));
+ if (horizontal.size ())
+ {
+ /*
+ ugh. Doesnt work for non-horizontal curves.
+ */
+ Real y = b.curve_point (horizontal[0])[Y_AXIS];
+
+ Real ry = rint (y/staff_space) * staff_space;
+ Real diff = ry - y;
+ Real newy = y;
+
+ Real clear = staff_space * gh_scm2double (me->get_grob_property ("staffline-clearance"));
+
+ if (fabs (y) <= Staff_symbol_referencer::staff_radius (me)
+ && fabs (diff) < clear)
+ {
+ Real y1 = ry + clear;
+ Real y2 = ry - clear;
+
+ /*
+ ugh, we shove the 0.5 out of our sleeves.
+
+ Any way. This test is to make sure that staffline
+ collision avoidance does not result in completely flat
+ ties.
+ */
+ if (fabs (y1 - ypos) < 0.5)
+ y1 = y2;
+ else if (fabs (y2 - ypos) < 0.5)
+ y2 = y1;
+
+ newy = (fabs (y1 - y) < fabs (y2 - y)) ? y1 : y2;
+
+ // newy = ry - 0.5 * staff_space * sign (diff) ;
+
+ /*
+ we don't want horizontal ties
+ */
+ if (fabs (newy - b.control_[0][Y_AXIS]) < 1e-2)
+ {
+ newy = newy + dir * staff_space;
+ }
+ }
+
+ 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
+ programming_error ("Tie is nowhere horizontal");
+
+
+
+ SCM controls = SCM_EOL;
+ for (int i= 4; i--;)
+ controls = gh_cons (ly_offset2scm (b.control_[i]), controls);
+ return controls;
+}
+
+
+MAKE_SCHEME_CALLBACK (Tie,brew_molecule,1);
+SCM
+Tie::brew_molecule (SCM smob)
{
- Note_head *new_l =n?(Note_head*)n->item():0;
- if (o->item() == left_head_l_)
- left_head_l_ = new_l;
- else if (o->item() == right_head_l_)
- right_head_l_ = new_l;
+ Grob*me = unsmob_grob (smob);
+
+ SCM cp = me->get_grob_property ("control-points");
+ if (cp == SCM_EOL)
+ {
+ cp = get_control_points (smob);
+ me->set_grob_property ("control-points", cp);
+ }
+
+ Real thick =
+ gh_scm2double (me->get_grob_property ("thickness"))
+ * me->paper_l ()->get_var ("linethickness");
+
+ Bezier b;
+ int i = 0;
+ for (SCM s= cp; s != SCM_EOL; s = ly_cdr (s))
+ {
+ b.control_[i] = ly_scm2offset (ly_car (s));
+ i++;
+ }
+
+ Molecule a = Lookup::slur (b, Directional_element_interface::get (me) * thick, thick);
+
+ return a.smobbed_copy ();
}
-IMPLEMENT_IS_TYPE_B1(Tie,Bow);
+ADD_INTERFACE (Tie,"tie-interface",
+ "A tie connecting two noteheads.
+direction = Forced direction for all ties",
+ "y-offset staffline-clearance control-points heads details thickness x-gap direction minimum-length");