Gets vertical skylines from grob stencils

lily/align-interface.cc

 /*
   This file is part of LilyPond, the GNU music typesetter.
 
   Copyright (C) 2000--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
 
@@ skipping 103 matching lines @@
           if (Axis_group_interface::has_interface (g)
               && !Hara_kiri_group_spanner::request_suicide (g, start, end))
             {
               extent = Axis_group_interface::rest_of_line_pure_height (g, start, end);
               Interval begin_of_line_extent = Axis_group_interface::begin_of_line_pure_height (g, start);
               if (!begin_of_line_extent.is_empty ())
                 {
                   Box b;
                   b[a] = begin_of_line_extent;
                   b[other_axis (a)] = Interval (-infinity_f, -1);
-                  skylines.insert (b, 0, other_axis (a));
+                  skylines.insert (b, other_axis (a));
                 }
             }
 
           if (!extent.is_empty ())
             {
               Box b;
               b[a] = extent;
               b[other_axis (a)] = Interval (0, infinity_f);
-              skylines.insert (b, 0, other_axis (a));
+              skylines.insert (b, other_axis (a));
             }
         }
 
       if (skylines.is_empty ())
         elements->erase (elements->begin () + i);
       else
         ret->push_back (skylines);
     }
   reverse (*ret);
 }
@@ skipping 241 matching lines @@
 
                /* properties */
                "align-dir "
                "axes "
                "full-score-pure-minimum-translations "
                "elements "
                "padding "
                "positioning-done "
                "stacking-dir "
               );