From fcd3150b12a826552f9ab41cbd46ebfda208e07e Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 27 May 2011 09:00:53 +0000
Subject: [PATCH] From Laurens Voerman, "While working on the osg exporter for
 3dsmax I found a bug in the TriStripVisitor. I created a small example
 (attached), and a modified version of src\osgUtil\TriStripVisitor.cpp where
 the problem is removed."

---
 src/osgUtil/TriStripVisitor.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/osgUtil/TriStripVisitor.cpp b/src/osgUtil/TriStripVisitor.cpp
index 5a998872a..870ae0632 100644
--- a/src/osgUtil/TriStripVisitor.cpp
+++ b/src/osgUtil/TriStripVisitor.cpp
@@ -77,7 +77,16 @@ struct VertexAttribComparitor
     void add(osg::Array* array, osg::Geometry::AttributeBinding binding)
     {
         if (binding==osg::Geometry::BIND_PER_VERTEX && array)
+        {
+            for(ArrayList::const_iterator itr=_arrayList.begin();
+                itr!=_arrayList.end();
+                ++itr)
+            {
+                if ((*itr) == array) 
+                    return;
+            }
             _arrayList.push_back(array);
+        }
     }
     
     typedef std::vector<osg::Array*> ArrayList;