2 tie-helper.cc -- implement Tie_configuration, Tie_details
4 source file of the GNU LilyPond music typesetter
6 (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
15 #include "staff-symbol-referencer.hh"
19 Tie_configuration::compare (Tie_configuration const &a,
20 Tie_configuration const &b)
22 if (a.position_ - b.position_)
23 return sign (a.position_ - b.position_);
24 return sign (a.dir_ - b.dir_);
28 Tie_configuration::Tie_configuration ()
37 Tie_configuration::center_tie_vertically (Tie_details const &details)
39 Bezier b = get_bezier (details);
40 Offset middle = b.curve_point (0.5);
41 Offset edge = b.curve_point (0.0);
43 Real center = (edge[Y_AXIS] + middle[Y_AXIS])/2.0;
45 delta_y_ = - dir_ * center;
50 Get bezier with left control at (0,0)
53 Tie_configuration::get_bezier (Tie_details const &details) const
55 Real l = attachment_x_.length();
56 if (isnan (l) || isnan (l))
58 programming_error ("Inf or NaN encountered");
62 details.height_limit_,
67 Tie_configuration::distance (Tie_configuration const &a,
68 Tie_configuration const &b)
71 Real d = 3 * (a.position_ - b.position_);
73 return d + (2 + (b.dir_ - a.dir_));
75 return d + (2 + (a.dir_ - b.dir_));
79 Tie_configuration::height (Tie_details const &details) const
81 Real l = attachment_x_.length();
84 details.height_limit_,
85 details.ratio_).curve_point (0.5)[Y_AXIS];
90 Tie_details::init (Grob *me)
92 staff_space_ = Staff_symbol_referencer::staff_space (me);
93 SCM details = me->get_property ("details");
95 = scm_assq (ly_symbol2scm ("height-limit"), details);
96 height_limit_ = robust_scm2double (scm_cdr (limit), 0.75) * staff_space_;
97 ratio_ = robust_scm2double (scm_cdr (scm_assq (ly_symbol2scm ("ratio"), details)),
100 x_gap_ = robust_scm2double (me->get_property ("x-gap"), 0.2);
104 Tie_details::Tie_details ()