to some absolute reference point */
if (!pure)
{
- Skyline_pair *skys = Skyline_pair::unsmob (g->get_property ("skylines"));
+ Skyline_pair *skys = Skyline_pair::unsmob (g->get_property (a == Y_AXIS
+ ? "vertical-skylines"
+ : "horizontal-skylines"));
if (skys)
skylines = *skys;