From 191675cc797e94f160597dbc6907552cdca0d8bc Mon Sep 17 00:00:00 2001
From: Mathias Froehlich <Mathias.Froehlich@web.de>
Date: Wed, 28 Mar 2012 07:44:41 +0200
Subject: [PATCH] scenery: Only run SGModelData in the topmost model.

It looks like that we loose the nasal script stored
in the property tree when this callback is issued
multiple times.

This should fix
 http://code.google.com/p/flightgear-bugs/issues/detail?id=714
---
 simgear/scene/model/SGReaderWriterXML.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/simgear/scene/model/SGReaderWriterXML.cxx b/simgear/scene/model/SGReaderWriterXML.cxx
index 17f23bc7..17c51dd9 100644
--- a/simgear/scene/model/SGReaderWriterXML.cxx
+++ b/simgear/scene/model/SGReaderWriterXML.cxx
@@ -218,7 +218,9 @@ sgLoad3DModel_internal(const SGPath& path,
     SGSharedPtr<SGPropertyNode> prop_root = options->getPropertyNode();
     if (!prop_root.valid())
         prop_root = new SGPropertyNode;
+    // The model data appear to be only used in the topmost model
     osg::ref_ptr<SGModelData> data = options->getModelData();
+    options->setModelData(0);
     
     osg::ref_ptr<osg::Node> model;
     osg::ref_ptr<osg::Group> group;