2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1999--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
22 #include "ly-smobs.icc"
24 IMPLEMENT_SIMPLE_SMOBS (Spring);
27 Spring::mark_smob (SCM)
29 return SCM_UNSPECIFIED;
33 Spring::print_smob (SCM, SCM p, scm_print_state *)
35 scm_puts ("#<Spring smob>", p);
40 Spring::equal_p (SCM a, SCM b)
42 return a == b ? SCM_BOOL_T : SCM_BOOL_F;
45 LY_DEFINE (ly_make_spring, "ly:make-spring",
46 2, 0, 0, (SCM ideal, SCM min_dist),
47 "Make a spring. @var{ideal} is the ideal distance of the"
48 " spring, and @var{min-dist} is the minimum distance.")
50 LY_ASSERT_TYPE (scm_is_number, ideal, 1);
51 LY_ASSERT_TYPE (scm_is_number, min_dist, 2);
53 Spring s (scm_to_double (ideal), scm_to_double (min_dist));
55 return s.smobbed_copy ();
58 LY_DEFINE (ly_spring_set_inverse_compress_strength_x, "ly:spring-set-inverse-compress-strength!",
59 2, 0, 0, (SCM spring, SCM strength),
60 "Set the inverse compress @var{strength} of @var{spring}.")
62 LY_ASSERT_SMOB (Spring, spring, 1);
63 LY_ASSERT_TYPE (scm_is_number, strength, 2);
65 Spring *s = Spring::unsmob (spring);
66 s->set_inverse_compress_strength (scm_to_double (strength));
67 return s->smobbed_copy ();
70 LY_DEFINE (ly_spring_set_inverse_stretch_strength_x, "ly:spring-set-inverse-stretch-strength!",
71 2, 0, 0, (SCM spring, SCM strength),
72 "Set the inverse stretch @var{strength} of @var{spring}.")
74 LY_ASSERT_SMOB (Spring, spring, 1);
75 LY_ASSERT_TYPE (scm_is_number, strength, 2);
77 Spring *s = Spring::unsmob (spring);
78 s->set_inverse_stretch_strength (scm_to_double (strength));
79 return s->smobbed_copy ();
82 IMPLEMENT_TYPE_P (Spring, "ly:spring?");