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1 /*
2   axis-group-interface-scheme.cc -- implement Axis_group_interface bindings
3
4   source file of the GNU LilyPond music typesetter
5
6   (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
7
8 */
9
10 #include "axis-group-interface.hh"
11 #include "lily-guile.hh"
12
13 LY_DEFINE(ly_relative_group_extent, "ly:relative-group-extent",
14           3, 0, 0, (SCM elements, SCM common, SCM axis),
15           "Determine the extent of @var{elements} relative to @var{common} in the "
16           "@var{axis} direction.")
17 {
18   SCM_ASSERT_TYPE(scm_is_pair (elements), elements, SCM_ARG1, __FUNCTION__, "list");
19   SCM_ASSERT_TYPE(unsmob_grob (common), common, SCM_ARG2, __FUNCTION__, "grob");
20   SCM_ASSERT_TYPE(is_axis (axis), axis, SCM_ARG3, __FUNCTION__, "axis");
21
22
23   Interval ext = Axis_group_interface::relative_group_extent (elements,
24                                                               unsmob_grob (common),
25                                                               (Axis) scm_to_int (axis));
26   return ly_interval2scm (ext);
27 }
28           
29