From Laurens Loerman, Fix for "Visual Studio 2013 gives me a large amount (2778) of warnings about inheritance via dominace (C4250)."

include/osg/ClusterCullingCallback

@@ -33,6 +33,9 @@ class OSG_EXPORT ClusterCullingCallback : public DrawableCullCallback, public No
 
         META_Object(osg,ClusterCullingCallback);
 
+        virtual NodeCallback* asNodeCallback() { return osg::NodeCallback::asNodeCallback(); }
+        virtual const NodeCallback* asNodeCallback() const { return osg::NodeCallback::asNodeCallback(); }
+
         // use the NodeCallbacks implementation of run.
         virtual bool run(osg::Object* object, osg::Object* data) { return NodeCallback::run(object, data); }
 

include/osgAnimation/AnimationUpdateCallback

@@ -41,6 +41,13 @@ namespace osgAnimation
 
         META_Object(osgAnimation, AnimationUpdateCallback<T>);
 
+        virtual osg::Callback* asCallback() { return T::asCallback(); }
+        virtual const osg::Callback* asCallback() const { return T::asCallback(); }
+
+        virtual osg::CallbackObject* asCallbackObject() { return T::asCallbackObject(); }
+        virtual const osg::CallbackObject* asCallbackObject() const { return T::asCallbackObject(); }
+
+
         const std::string& getName() const { return T::getName(); }
         bool link(Channel* /*channel*/) { return 0; }
         int link(Animation* animation)

include/osgGA/EventHandler

@@ -43,6 +43,9 @@ public:
 
         META_Object(osgGA, EventHandler);
 
+        virtual NodeCallback* asNodeCallback() { return osg::NodeCallback::asNodeCallback(); }
+        virtual const NodeCallback* asNodeCallback() const { return osg::NodeCallback::asNodeCallback(); }
+
         virtual bool run(osg::Object* object, osg::Object* data)
         {
             osg::Node* node = dynamic_cast<osg::Node*>(object);

include/osgViewer/ViewerEventHandlers

@@ -510,6 +510,9 @@ public:
 
     META_Object(osgViewer, InteractiveImageHandler);
 
+    virtual NodeCallback* asNodeCallback() { return osg::NodeCallback::asNodeCallback(); }
+    virtual const NodeCallback* asNodeCallback() const { return osg::NodeCallback::asNodeCallback(); }
+
     // use the osgGA::GUIEventHandler implementation of run.
     virtual bool run(osg::Object* object, osg::Object* data) { return osgGA::GUIEventHandler::run(object, data); }
 

include/osgVolume/Property

@@ -487,6 +487,9 @@ class OSGVOLUME_EXPORT PropertyAdjustmentCallback : public osgGA::GUIEventHandle
 
         META_Object(osgVolume, PropertyAdjustmentCallback);
 
+        virtual NodeCallback* asNodeCallback() { return osg::NodeCallback::asNodeCallback(); }
+        virtual const NodeCallback* asNodeCallback() const { return osg::NodeCallback::asNodeCallback(); }
+
         virtual bool run(osg::Object* object, osg::Object* data) { return osgGA::GUIEventHandler::run(object, data); }
 
         void setKeyEventCycleForward(int key) { _cyleForwardKey = key; }