From 5caf53b6a3b68c8fdf30ea8cd507eeb9aad0c3c8 Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Sun, 26 Feb 2017 03:23:49 +0100
Subject: [PATCH] optimizer: avoid reordering nodes

Fixes an osgParticle cloning issue.

(Fixes #3773)
---
 components/sceneutil/optimizer.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/components/sceneutil/optimizer.cpp b/components/sceneutil/optimizer.cpp
index 1aadc19d6a..99f7ae122c 100644
--- a/components/sceneutil/optimizer.cpp
+++ b/components/sceneutil/optimizer.cpp
@@ -847,10 +847,11 @@ void Optimizer::RemoveRedundantNodesVisitor::removeRedundantNodes()
                 pitr!=parents.end();
                 ++pitr)
             {
+                unsigned int childIndex = (*pitr)->getChildIndex(group);
                 for (unsigned int i=0; i<group->getNumChildren(); ++i)
                 {
                     osg::Node* child = group->getChild(i);
-                    (*pitr)->addChild(child);
+                    (*pitr)->insertChild(childIndex++, child);
                 }
 
                 (*pitr)->removeChild(group);