lily/staff-symbol-referencer-scheme.cc

   1 /*
   2   staff-symbol-referencer-scheme.cc -- implement Staff_symbol_referencer bindings
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "grob.hh"
  10 #include "staff-symbol-referencer.hh"
  11 #include "libc-extension.hh"
  12
  13 LY_DEFINE (ly_grob_staff_position, "ly:grob-staff-position",
  14            1, 0, 0, (SCM sg),
  15            "Return the Y-position of @var{sg} relative to the staff.")
  16 {
  17   LY_ASSERT_SMOB (Grob, sg, 1);
  18   Grob *g = unsmob_grob (sg);
  19   Real pos = Staff_symbol_referencer::get_position (g);
  20
  21   if (fabs (rint (pos) -pos) < 1e-6) // ugh.
  22     return scm_from_int ((int) my_round (pos));
  23   else
  24     return scm_from_double (pos);
  25 }