From 48e0f098ff1c19816785d7718b972c79bd1cc144 Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Fri, 24 Feb 2017 07:38:03 +0100
Subject: [PATCH] Add missing copy of callbacks when a Transform is replaced by
 Group

(Fixes #3770)
---
 components/sceneutil/optimizer.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/components/sceneutil/optimizer.cpp b/components/sceneutil/optimizer.cpp
index b0686d524..1aadc19d6 100644
--- a/components/sceneutil/optimizer.cpp
+++ b/components/sceneutil/optimizer.cpp
@@ -537,7 +537,10 @@ 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)
                 {