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>
16 #include "staff-symbol-referencer.hh"
20 Tie_configuration::compare (Tie_configuration const &a,
21 Tie_configuration const &b)
23 if (a.position_ - b.position_)
24 return sign (a.position_ - b.position_);
25 return sign (a.dir_ - b.dir_);
29 Tie_configuration::Tie_configuration ()
38 Tie_configuration::center_tie_vertically (Tie_details const &details)
40 Bezier b = get_bezier (details);
41 Offset middle = b.curve_point (0.5);
42 Offset edge = b.curve_point (0.0);
44 Real center = (edge[Y_AXIS] + middle[Y_AXIS])/2.0;
46 delta_y_ = - dir_ * center;
51 Get bezier with left control at (0,0)
54 Tie_configuration::get_bezier (Tie_details const &details) const
56 Real l = attachment_x_.length();
57 if (isnan (l) || isnan (l))
59 programming_error ("Inf or NaN encountered");
63 details.height_limit_,
68 Tie_configuration::distance (Tie_configuration const &a,
69 Tie_configuration const &b)
72 Real d = 3 * (a.position_ - b.position_);
74 return d + (2 + (b.dir_ - a.dir_));
76 return d + (2 + (a.dir_ - b.dir_));
80 Tie_configuration::height (Tie_details const &details) const
82 Real l = attachment_x_.length();
85 details.height_limit_,
86 details.ratio_).curve_point (0.5)[Y_AXIS];
91 Tie_details::init (Grob *me)
93 staff_space_ = Staff_symbol_referencer::staff_space (me);
94 SCM details = me->get_property ("details");
96 = scm_assq (ly_symbol2scm ("height-limit"), details);
97 height_limit_ = robust_scm2double (scm_cdr (limit), 0.75) * staff_space_;
98 ratio_ = robust_scm2double (scm_cdr (scm_assq (ly_symbol2scm ("ratio"), details)),
101 x_gap_ = robust_scm2double (me->get_property ("x-gap"), 0.2);
105 Tie_details::Tie_details ()