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diff --git a/extern/bullet2/BulletCollision/CollisionShapes/btMultiSphereShape.h b/extern/bullet2/BulletCollision/CollisionShapes/btMultiSphereShape.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 MULTI_SPHERE_MINKOWSKI_H
+#define MULTI_SPHERE_MINKOWSKI_H
+
+#include "btConvexInternalShape.h"
+#include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h" // for the types
+#include "LinearMath/btAlignedObjectArray.h"
+#include "LinearMath/btAabbUtil2.h"
+
+
+
+///The btMultiSphereShape represents the convex hull of a collection of spheres. You can create special capsules or other smooth volumes.
+///It is possible to animate the spheres for deformation, but call 'recalcLocalAabb' after changing any sphere position/radius
+class btMultiSphereShape : public btConvexInternalAabbCachingShape
+{
+	
+	btAlignedObjectArray<btVector3> m_localPositionArray;
+	btAlignedObjectArray<btScalar>  m_radiArray;
+	
+public:
+	btMultiSphereShape (const btVector3* positions,const btScalar* radi,int numSpheres);
+
+	///CollisionShape Interface
+	virtual void	calculateLocalInertia(btScalar mass,btVector3& inertia) const;
+
+	/// btConvexShape Interface
+	virtual btVector3	localGetSupportingVertexWithoutMargin(const btVector3& vec)const;
+
+	virtual void	batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const;
+	
+	int	getSphereCount() const
+	{
+		return m_localPositionArray.size();
+	}
+
+	const btVector3&	getSpherePosition(int index) const
+	{
+		return m_localPositionArray[index];
+	}
+
+	btScalar	getSphereRadius(int index) const
+	{
+		return m_radiArray[index];
+	}
+
+
+	virtual const char*	getName()const 
+	{
+		return "MultiSphere";
+	}
+
+	virtual	int	calculateSerializeBufferSize() const;
+
+	///fills the dataBuffer and returns the struct name (and 0 on failure)
+	virtual	const char*	serialize(void* dataBuffer, btSerializer* serializer) const;
+
+
+};
+
+
+struct	btPositionAndRadius
+{
+	btVector3FloatData	m_pos;
+	float		m_radius;
+};
+
+struct	btMultiSphereShapeData
+{
+	btConvexInternalShapeData	m_convexInternalShapeData;
+
+	btPositionAndRadius	*m_localPositionArrayPtr;
+	int				m_localPositionArraySize;
+	char	m_padding[4];
+};
+
+
+
+SIMD_FORCE_INLINE	int	btMultiSphereShape::calculateSerializeBufferSize() const
+{
+	return sizeof(btMultiSphereShapeData);
+}
+
+
+
+#endif //MULTI_SPHERE_MINKOWSKI_H