From 8f1df6c3584f10b00ec305bea57ac9e324cddfff Mon Sep 17 00:00:00 2001
From: Thomas Geymayer <tomgey@gmail.com>
Date: Mon, 1 Apr 2013 13:33:54 +0200
Subject: [PATCH] Helpers to clone SGModelData

This is needed for latest SimGear to fix scene model
unload not being called
---
 src/AIModel/AIBase.cxx           | 2 ++
 src/Scripting/NasalModelData.cxx | 2 +-
 src/Scripting/NasalModelData.hxx | 2 ++
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/AIModel/AIBase.cxx b/src/AIModel/AIBase.cxx
index 4db3e8f11..652524378 100644
--- a/src/AIModel/AIBase.cxx
+++ b/src/AIModel/AIBase.cxx
@@ -70,6 +70,8 @@ public:
     {
     }
     
+    virtual FGAIModelData* clone() const { return new FGAIModelData(); }
+
     /** osg callback, thread-safe */
     void modelLoaded(const std::string& path, SGPropertyNode *prop, osg::Node *n)
     {
diff --git a/src/Scripting/NasalModelData.cxx b/src/Scripting/NasalModelData.cxx
index 2181cb17f..2afd9c87d 100644
--- a/src/Scripting/NasalModelData.cxx
+++ b/src/Scripting/NasalModelData.cxx
@@ -31,7 +31,7 @@ typedef nasal::Ghost<NodeRef> NasalNode;
  * model.
  */
 static naRef f_node_getPose( const osg::Node& node,
-                                   const nasal::CallContext& ctx )
+                             const nasal::CallContext& ctx )
 {
   osg::NodePathList parent_paths = node.getParentalNodePaths();
   for( osg::NodePathList::const_iterator path = parent_paths.begin();
diff --git a/src/Scripting/NasalModelData.hxx b/src/Scripting/NasalModelData.hxx
index 8c8b13d6e..22ae536fe 100644
--- a/src/Scripting/NasalModelData.hxx
+++ b/src/Scripting/NasalModelData.hxx
@@ -89,6 +89,8 @@ public:
                       SGPropertyNode *prop,
                       osg::Node *branch );
     
+    virtual FGNasalModelDataProxy* clone() const { return new FGNasalModelDataProxy(_root); }
+
 protected:
     SGPropertyNode_ptr _root;
     FGNasalModelDataRef _data;
-- 
2.39.5