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diff --git a/extern/bullet2/BulletCollision/CollisionShapes/btMinkowskiSumShape.h b/extern/bullet2/BulletCollision/CollisionShapes/btMinkowskiSumShape.h
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+++ b/extern/bullet2/BulletCollision/CollisionShapes/btMinkowskiSumShape.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 MINKOWSKI_SUM_SHAPE_H
+#define MINKOWSKI_SUM_SHAPE_H
+
+#include "btConvexInternalShape.h"
+#include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h" // for the types
+
+/// The btMinkowskiSumShape is only for advanced users. This shape represents implicit based minkowski sum of two convex implicit shapes.
+class btMinkowskiSumShape : public btConvexInternalShape
+{
+
+	btTransform	m_transA;
+	btTransform	m_transB;
+	const btConvexShape*	m_shapeA;
+	const btConvexShape*	m_shapeB;
+
+public:
+
+	btMinkowskiSumShape(const btConvexShape* shapeA,const btConvexShape* shapeB);
+
+	virtual btVector3	localGetSupportingVertexWithoutMargin(const btVector3& vec)const;
+
+	virtual void	batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const;
+
+
+	virtual void	calculateLocalInertia(btScalar mass,btVector3& inertia) const;
+
+	void	setTransformA(const btTransform&	transA) { m_transA = transA;}
+	void	setTransformB(const btTransform&	transB) { m_transB = transB;}
+
+	const btTransform& getTransformA()const  { return m_transA;}
+	const btTransform& GetTransformB()const  { return m_transB;}
+
+
+	virtual btScalar	getMargin() const;
+
+	const btConvexShape*	getShapeA() const { return m_shapeA;}
+	const btConvexShape*	getShapeB() const { return m_shapeB;}
+
+	virtual const char*	getName()const 
+	{
+		return "MinkowskiSum";
+	}
+};
+
+#endif //MINKOWSKI_SUM_SHAPE_H