Merge branch 'master' of ssh+git://hanwen@git.sv.gnu.org/srv/git/lilypond

[lilypond.git] / lily / skyline.cc

diff --git a/lily/skyline.cc b/lily/skyline.cc
index 0e2f2fa12b97862dd1956d9a10d8d731d53a3dfe..99452189c65f7784678e82c71c7e94ec3fbd9a60 100644 (file)
--- a/lily/skyline.cc
+++ b/lily/skyline.cc
@@ -582,6 +582,12 @@ Skyline::to_points () const
   return out;
 }
 
+bool
+Skyline::is_empty () const
+{
+  return buildings_.empty ();
+}
+
 Skyline_pair::Skyline_pair ()
   : skylines_ (Skyline (DOWN), Skyline (UP))
 {
@@ -625,6 +631,13 @@ Skyline_pair::merge (Skyline_pair const &other)
   skylines_[DOWN].merge (other[DOWN]);
 }
 
+bool
+Skyline_pair::is_empty () const
+{
+  return skylines_[UP].is_empty ()
+    && skylines_[DOWN].is_empty ();
+}
+
 Skyline&
 Skyline_pair::operator [] (Direction d)
 {