From c9621ff17a33d6efb5f8701ae55add53d29540a2 Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Fri, 24 Feb 2017 07:41:19 +0100
Subject: [PATCH] Add missing copy of callbacks when a Transform is replaced by
 Group

---
 src/osgUtil/Optimizer.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/osgUtil/Optimizer.cpp b/src/osgUtil/Optimizer.cpp
index f93f6ae5f..575a9545a 100644
--- a/src/osgUtil/Optimizer.cpp
+++ b/src/osgUtil/Optimizer.cpp
@@ -1064,7 +1064,10 @@ bool CollectLowestTransformsVisitor::removeTransforms(osg::Node* nodeWeCannotRem
                 group->setDataVariance(osg::Object::STATIC);
                 group->setNodeMask(transform->getNodeMask());
                 group->setStateSet(transform->getStateSet());
-                group->setUserData(transform->getUserData());
+                group->setUpdateCallback(transform->getUpdateCallback());
+                group->setEventCallback(transform->getEventCallback());
+                group->setCullCallback(transform->getCullCallback());
+                group->setUserDataContainer(transform->getUserDataContainer());
                 group->setDescriptions(transform->getDescriptions());
                 for(unsigned int i=0;i<transform->getNumChildren();++i)
                 {