Further work on new threading model.

include/osgUtil/SceneView

@@ -443,6 +443,9 @@ class OSGUTIL_EXPORT SceneView : public osg::Object, public osg::CullSettings
         /** Do draw traversal of draw bins generated by cull traversal.*/
         virtual void draw();
         
+        /** Compute the number of dynamic objects that will be held in the rendering backend */
+        unsigned int getDynamicObjectCount() const { return _dynamicObjectCount; }
+        
         /** Release all OpenGL objects from the scene graph, such as texture objects, display lists etc.
           * These released scene graphs placed in the respective delete GLObjects cache, which
           * then need to be deleted in OpenGL by SceneView::flushAllDeleteGLObjects(). */
@@ -515,7 +518,7 @@ class OSGUTIL_EXPORT SceneView : public osg::Object, public osg::CullSettings
         int                                         _interlacedStereoStencilWidth;
         int                                         _interlacedStereoStencilHeight;
 
-        
+        unsigned int                                _dynamicObjectCount;        
 };
 
 }