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diff --git a/extern/bullet2/BulletCollision/CollisionShapes/btTetrahedronShape.h b/extern/bullet2/BulletCollision/CollisionShapes/btTetrahedronShape.h
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+++ b/extern/bullet2/BulletCollision/CollisionShapes/btTetrahedronShape.h
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+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2009 Erwin Coumans  http://bulletphysics.org
+
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising from the use of this software.
+Permission is granted to anyone to use this software for any purpose, 
+including commercial applications, and to alter it and redistribute it freely, 
+subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef BU_SIMPLEX_1TO4_SHAPE
+#define BU_SIMPLEX_1TO4_SHAPE
+
+
+#include "btPolyhedralConvexShape.h"
+#include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h"
+
+
+///The btBU_Simplex1to4 implements tetrahedron, triangle, line, vertex collision shapes. In most cases it is better to use btConvexHullShape instead.
+class btBU_Simplex1to4 : public btPolyhedralConvexAabbCachingShape
+{
+protected:
+
+	int	m_numVertices;
+	btVector3	m_vertices[4];
+
+public:
+	btBU_Simplex1to4();
+
+	btBU_Simplex1to4(const btVector3& pt0);
+	btBU_Simplex1to4(const btVector3& pt0,const btVector3& pt1);
+	btBU_Simplex1to4(const btVector3& pt0,const btVector3& pt1,const btVector3& pt2);
+	btBU_Simplex1to4(const btVector3& pt0,const btVector3& pt1,const btVector3& pt2,const btVector3& pt3);
+
+    
+	void	reset()
+	{
+		m_numVertices = 0;
+	}
+	
+	virtual void getAabb(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const;
+
+	void addVertex(const btVector3& pt);
+
+	//PolyhedralConvexShape interface
+
+	virtual int	getNumVertices() const;
+
+	virtual int getNumEdges() const;
+
+	virtual void getEdge(int i,btVector3& pa,btVector3& pb) const;
+	
+	virtual void getVertex(int i,btVector3& vtx) const;
+
+	virtual int	getNumPlanes() const;
+
+	virtual void getPlane(btVector3& planeNormal,btVector3& planeSupport,int i) const;
+
+	virtual int getIndex(int i) const;
+
+	virtual	bool isInside(const btVector3& pt,btScalar tolerance) const;
+
+
+	///getName is for debugging
+	virtual const char*	getName()const { return "btBU_Simplex1to4";}
+
+};
+
+#endif //BU_SIMPLEX_1TO4_SHAPE