Improved the speed of the ValueObject get/setting by utilizing typeid() and static_cast<> in place of original dynamic_cast<>'s

include/osg/Object

@@ -141,7 +141,7 @@ class OSG_EXPORT Object : public Referenced
         /** Convert 'this' into a Camera pointer if Node is a Camera, otherwise return 0.
           * Equivalent to dynamic_cast<Camera*>(this).*/
         virtual Camera* asCamera() { return 0; }
-        
+
         /** convert 'const this' into a const Camera pointer if Node is a Camera, otherwise return 0.
           * Equivalent to dynamic_cast<const Camera*>(this).*/
         virtual const Camera* asCamera() const { return 0; }
@@ -170,6 +170,14 @@ class OSG_EXPORT Object : public Referenced
           * Equivalent to dynamic_cast<const CallbackObject*>(this).*/
         virtual const CallbackObject* asCallbackObject() const { return 0; }
 
+        /** Convert 'this' into a UserDataContainer pointer if Object is a UserDataContainer, otherwise return 0.
+          * Equivalent to dynamic_cast<UserDataContainer*>(this).*/
+        virtual UserDataContainer* asUserDataContainer() { return 0; }
+
+        /** convert 'const this' into a const UserDataContainer pointer if Object is a UserDataContainer, otherwise return 0.
+          * Equivalent to dynamic_cast<const UserDataContainer*>(this).*/
+        virtual const UserDataContainer* asUserDataContainer() const { return 0; }
+
 
         /** Set whether to use a mutex to ensure ref() and unref() are thread safe.*/
         virtual void setThreadSafeRefUnref(bool threadSafe);
@@ -366,7 +374,6 @@ protected:
 };
 
 
-
 }
 
 #endif