allow cull callback disabling

panda/src/pgraph/pandaNode.cxx

@@ -2835,6 +2835,21 @@ set_cull_callback() {
   CLOSE_ITERATE_CURRENT_AND_UPSTREAM(_cycler);
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: PandaNode::disable_cull_callback
+//       Access: Protected
+//  Description: disables the call back
+////////////////////////////////////////////////////////////////////
+void PandaNode::
+disable_cull_callback() {
+  Thread *current_thread = Thread::get_current_thread();
+  OPEN_ITERATE_CURRENT_AND_UPSTREAM(_cycler, current_thread) {
+    CDStageWriter cdata(_cycler, pipeline_stage, current_thread);
+    cdata->set_fancy_bit(FB_cull_callback, false);
+  }
+  CLOSE_ITERATE_CURRENT_AND_UPSTREAM(_cycler);
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: PandaNode::stage_remove_child
 //       Access: Private

panda/src/pgraph/pandaNode.h

@@ -325,7 +325,7 @@ protected:
                                Thread *current_thread);
 
   void set_cull_callback();
-
+  void disable_cull_callback();
 public:
   virtual void r_prepare_scene(const RenderState *state,
                                PreparedGraphicsObjects *prepared_objects,