Imported Upstream version 2.18.0

[lilypond.git] / lily / include / bezier.hh

diff --git a/lily/include/bezier.hh b/lily/include/bezier.hh
index 1e88dbb76499080680f30459562c4912c9086155..d09c0ac8bee4a7870d319ab1b64a240278bbcfbf 100644 (file)
--- a/lily/include/bezier.hh
+++ b/lily/include/bezier.hh
@@ -48,6 +48,7 @@ public:
 
   Polynomial polynomial (Axis)const;
   Offset curve_point (Real t) const;
+  Real slope_at_point (Real t) const;
   Real curve_coordinate (Real t, Axis) const;
 
   static const int CONTROL_COUNT = 4;