/*
tie.cc -- implement Tie
- source file of the LilyPond music typesetter
+ source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "paper-def.hh"
#include "tie.hh"
-#include "notehead.hh"
-#include "p-col.hh"
-Spanner*
-Tie::do_break_at(PCol*l, PCol*r) const
+#include <math.h>
+
+#include "spanner.hh"
+#include "lookup.hh"
+#include "output-def.hh"
+#include "rhythmic-head.hh"
+#include "bezier.hh"
+#include "paper-column.hh"
+#include "warn.hh"
+#include "staff-symbol-referencer.hh"
+#include "directional-element-interface.hh"
+#include "bezier.hh"
+#include "stem.hh"
+#include "note-head.hh"
+#include "tie-column.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, Grob *h)
{
- Tie * tie_p = new Tie(*this);
- Line_of_score const *line_C=l->line_l_;
- tie_p->left_head_l_ = (left_head_l_->line_l()== line_C) ?
- left_head_l_ : 0;
- tie_p->right_head_l_ = (right_head_l_->line_l() == line_C)?
- right_head_l_ : 0;
-
- return tie_p;
+ assert (!head (me, d));
+ index_set_cell (me->get_property ("head-pair"), d, h->self_scm ());
+
+ dynamic_cast<Spanner *> (me)->set_bound (d, h);
+ me->add_dependency (h);
}
void
-Tie::set_head(int x_pos, Notehead * head_l)
+Tie::set_interface (Grob *me)
{
- 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);
+ me->set_property ("head-pair", scm_cons (SCM_EOL, SCM_EOL));
}
-Tie::Tie()
+Grob *
+Tie::head (Grob *me, Direction d)
{
- right_head_l_ =0;
- left_head_l_ =0;
+ SCM c = me->get_property ("head-pair");
+
+ if (scm_is_pair (c))
+ return unsmob_grob (index_get_cell (c, d));
+ else
+ return 0;
}
-void
-Tie::set_default_dir()
+int
+Tie::get_column_rank (Grob *me, Direction d)
{
- int m= (left_head_l_->position_i_ + right_head_l_->position_i_) /2 ;
- dir_i_ = (m < 5)? -1:1; // ugh
+ Spanner *span = dynamic_cast<Spanner *> (me);
+ Grob *h = head (me, d);
+ if (!h)
+ h = span->get_bound (d);
+
+ Grob *col = dynamic_cast<Item *> (h)->get_column ();
+ return Paper_column::get_rank (col);
}
-
-void
-Tie::do_add_processing()
+Real
+Tie::get_position (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::get_position (head (me, d));
+}
+
+/*
+ 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).
+
+ (what about linebreaks? )
+*/
+Direction
+Tie::get_default_dir (Grob *me)
+{
+ Item *sl = head (me, LEFT) ? Rhythmic_head::get_stem (head (me, LEFT)) : 0;
+ Item *sr = head (me, RIGHT) ? Rhythmic_head::get_stem (head (me, RIGHT)) : 0;
+ if (sl && sr)
+ {
+ if (get_grob_direction (sl) == UP
+ && get_grob_direction (sr) == UP)
+ return DOWN;
+ }
+ else if (sl || sr)
+ {
+ Item *s = sl ? sl : sr;
+ return -get_grob_direction (s);
+ }
+
+ return UP;
}
void
-Tie::do_post_processing()
+Tie::set_direction (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_) {
- right_pos_i_ += 2*dir_i_;
- right_dx_f_ -= 0.25;
- } else
- right_dx_f_ -= 0.5;
-
- if (left_head_l_ && left_head_l_->extremal_i_) {
- left_pos_i_ += 2*dir_i_;
- left_dx_f_ += 0.25;
- } else
- left_dx_f_ += 0.5;
+ if (!get_grob_direction (me))
+ {
+ if (Tie_column::has_interface (me->get_parent (Y_AXIS)))
+ Tie_column::set_directions (me->get_parent (Y_AXIS));
+ else
+ set_grob_direction (me, Tie::get_default_dir (me));
+ }
}
+/*
+ TODO: we should also use thickness for computing the clearance
+ between head and tie. Very thick ties will now touch the note head.
+*/
+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
+ {
+ programming_error ("tie without heads");
+ me->suicide ();
+ return SCM_EOL;
+ }
+
+ set_direction (me);
+
+ Direction dir = get_grob_direction (me);
+
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
+
+ Real x_gap_f = robust_scm2double (me->get_property ("x-gap"), 0);
+
+ 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))
+ {
+ 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_x = l->extent (l, X_AXIS).linear_combination (lambda);
+
+ 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;
+ }
+
+ SCM details = me->get_property ("details");
+
+ SCM lim // groetjes aan de chirurgendochter.
+ = scm_assq (ly_symbol2scm ("height-limit"), details);
+
+ Real h_inf = scm_to_double (scm_cdr (lim)) * staff_space;
+ Real r_0 = scm_to_double (scm_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::get_position (me) * staff_space / 2
+ + dir * scm_to_double (me->get_property ("y-offset"));;
+
+ /*
+ Make sure we don't start on a dots
+ */
+ if (Note_head::has_interface (l) && Rhythmic_head::get_dots (l))
+ {
+ Grob *dots = Rhythmic_head::get_dots (l);
+ if (fabs (staff_space * Staff_symbol_referencer::get_position (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 * scm_to_double (me->get_property ("staffline-clearance"));
+
+ if (fabs (y)
+ <= Staff_symbol_referencer::staff_radius (me) * staff_space + clear
+ && 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 = scm_cons (ly_offset2scm (b.control_[i]), controls);
+ return controls;
+}
+
+MAKE_SCHEME_CALLBACK (Tie, print, 1);
+SCM
+Tie::print (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+
+ SCM cp = me->get_property ("control-points");
+ if (!scm_is_pair (cp)) // list is more accurate
+ {
+ cp = get_control_points (smob);
+ me->set_property ("control-points", cp);
+ }
+
+ if (!scm_is_pair (cp))
+ return Stencil ().smobbed_copy ();
+
+
+ Real staff_thick = Staff_symbol_referencer::line_thickness (me);
+ Real base_thick = robust_scm2double (me->get_property ("thickness"), 1);
+ Real thick = base_thick * staff_thick;
+
+
+ Bezier b;
+ int i = 0;
+ for (SCM s = cp; s != SCM_EOL; s = scm_cdr (s))
+ {
+ b.control_[i] = ly_scm2offset (scm_car (s));
+ i++;
+ }
+
+ Stencil a;
+
+ SCM p = me->get_property ("dash-period");
+ SCM f = me->get_property ("dash-fraction");
+ if (scm_is_number (p) && scm_is_number (f))
+ a = Lookup::dashed_slur (b,
+ thick,
+ robust_scm2double (p, 1.0),
+ robust_scm2double (f, 0));
+ else
+ a = Lookup::slur (b,
+ get_grob_direction (me) * staff_thick,
+ thick);
+
+
+ return a.smobbed_copy ();
+}
+ADD_INTERFACE (Tie,
+ "tie-interface",
+ "A tie connecting two noteheads.\n",
+
+ "y-offset dash-period dash-fraction "
+ "staffline-clearance control-points head-pair "
+ "details thickness x-gap direction minimum-length");
projects / lilypond.git / blobdiff