From afcf54b1086198b7a412bbfdc361f01b302f1d6e Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 14 May 2014 16:52:18 +0000
Subject: [PATCH] Fixed the bounding sphere computation and handling of
 Drawable as the root of the scene graph

---
 include/osg/Drawable        | 2 ++
 src/osgUtil/CullVisitor.cpp | 5 +----
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/include/osg/Drawable b/include/osg/Drawable
index 457ed2f01..6b5e02586 100644
--- a/include/osg/Drawable
+++ b/include/osg/Drawable
@@ -157,6 +157,8 @@ class OSG_EXPORT Drawable : public Node
 
                 _boundingSphereComputed = true;
             }
+            _boundingSphere.set(_boundingBox.center(), _boundingBox.radius());
+
             return _boundingBox;
         }
 
diff --git a/src/osgUtil/CullVisitor.cpp b/src/osgUtil/CullVisitor.cpp
index 6535fdeae..764509340 100644
--- a/src/osgUtil/CullVisitor.cpp
+++ b/src/osgUtil/CullVisitor.cpp
@@ -989,10 +989,7 @@ void CullVisitor::apply(osg::Drawable& drawable)
         return;
     }
 
-    //else
-    {
-        if (getNodePath().back()->isCullingActive() && isCulled(bb)) return;
-    }
+    if (!getNodePath().empty() && getNodePath().back()->isCullingActive() && isCulled(bb)) return;
 
 
     if (_computeNearFar && bb.valid())