Approximates cross-staff slurs in VerticalAxisGroup vertical-skylines.

lily/grob.cc

 /*
   This file is part of LilyPond, the GNU music typesetter.
 
   Copyright (C) 1997--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 356 matching lines @@
   /* we simulate positioning-done if we are the child of a VerticalAlignment,
      but only if we don't have a cached offset. If we do have a cached offset,
      it probably means that the Alignment was fixed and it has already been
      calculated.
   */
   if (Grob *p = get_parent (Y_AXIS))
     {
       Real trans = 0;
       if (Align_interface::has_interface (p) && !dim_cache_[Y_AXIS].offset_)
         trans = Align_interface::get_pure_child_y_translation (p, this, start, end);
-
+//printf ("%s O T %4.4f %4.4f\n", name().c_str(), off, trans);
       return off + trans + p->pure_relative_y_coordinate (refp, start, end);
     }
   return off;
 }
 
 /* Invoke callbacks to get offset relative to parent.  */
 Real
 Grob::get_offset (Axis a) const
 {
   if (dim_cache_[a].offset_)
@@ skipping 572 matching lines @@
   if (Align_interface::has_interface (commony))
     return true;
 
   for (Grob *g = this; g && g != commony; g = g->get_parent (Y_AXIS))
     if (Align_interface::has_interface (g))
       return true;
 
   return false;
 }