From 6b2e17fe142cc05a9746ffe9896fee4f7f7dfed4 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 10 Sep 2004 08:26:53 +0000
Subject: [PATCH] Made update, cull and draw callbacks virtual to allow custom
 Drawable's to there own specific extensions for handling callbacks

---
 include/osg/Drawable | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/osg/Drawable b/include/osg/Drawable
index ab68e52ab..04ec9071b 100644
--- a/include/osg/Drawable
+++ b/include/osg/Drawable
@@ -275,7 +275,7 @@ class SG_EXPORT Drawable : public Object
         };
         
         /** Set the UpdateCallback which allows users to attach customize the updating of an object during the update traversal.*/
-        void setUpdateCallback(UpdateCallback* ac);
+        virtual void setUpdateCallback(UpdateCallback* ac);
         
         /** Get the non const UpdateCallback.*/
         UpdateCallback* getUpdateCallback() { return _updateCallback.get(); }
@@ -297,7 +297,7 @@ class SG_EXPORT Drawable : public Object
         };
 
         /** Set the CullCallback which allows users to customize the culling of Drawable during the cull traversal.*/
-        void setCullCallback(CullCallback* cc) { _cullCallback=cc; }
+        virtual void setCullCallback(CullCallback* cc) { _cullCallback=cc; }
         
         /** Get the non const CullCallback.*/
         CullCallback* getCullCallback() { return _cullCallback.get(); }
@@ -326,7 +326,7 @@ class SG_EXPORT Drawable : public Object
         };
 
         /** Set the DrawCallback which allows users to attach customize the drawing of existing Drawable object.*/
-        void setDrawCallback(DrawCallback* dc) { _drawCallback=dc; dirtyDisplayList(); }
+        virtual void setDrawCallback(DrawCallback* dc) { _drawCallback=dc; dirtyDisplayList(); }
         
         /** Get the non const DrawCallback.*/
         DrawCallback* getDrawCallback() { return _drawCallback.get(); }