Fixed a crash: the singleton needs to be instantiated the first time SGCommandMgr...

[simgear.git] / simgear / props / PropertyInterpolationMgr.hxx

diff --git a/simgear/props/PropertyInterpolationMgr.hxx b/simgear/props/PropertyInterpolationMgr.hxx
index 446fad9490063200409795cfe845e86ea93cb45e..efd907d9a4317383bc3d9a43ba6f6d120c6223a0 100644 (file)
--- a/simgear/props/PropertyInterpolationMgr.hxx
+++ b/simgear/props/PropertyInterpolationMgr.hxx
@@ -76,14 +76,15 @@ namespace simgear
                           const std::string& easing );
 
       /**
-       * Add animation of the given property from current its current value to
-       * the target value of the interpolator.
+       * Add animation of the given property from its current value to the
+       * target value of the interpolator. If no interpolator is given any
+       * existing animation of the given property is aborted.
        *
        * @param prop    Property to be interpolated
        * @param interp  Interpolator used for interpolation
        */
       bool interpolate( SGPropertyNode* prop,
-                        PropertyInterpolatorRef interp );
+                        PropertyInterpolatorRef interp  = 0 );
 
       bool interpolate( SGPropertyNode* prop,
                         const std::string& type,