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diff --git a/extern/bullet2/BulletCollision/CollisionShapes/btStridingMeshInterface.h b/extern/bullet2/BulletCollision/CollisionShapes/btStridingMeshInterface.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 STRIDING_MESHINTERFACE_H
+#define STRIDING_MESHINTERFACE_H
+
+#include "LinearMath/btVector3.h"
+#include "btTriangleCallback.h"
+#include "btConcaveShape.h"
+
+
+
+
+
+///	The btStridingMeshInterface is the interface class for high performance generic access to triangle meshes, used in combination with btBvhTriangleMeshShape and some other collision shapes.
+/// Using index striding of 3*sizeof(integer) it can use triangle arrays, using index striding of 1*sizeof(integer) it can handle triangle strips.
+/// It allows for sharing graphics and collision meshes. Also it provides locking/unlocking of graphics meshes that are in gpu memory.
+class  btStridingMeshInterface
+{
+	protected:
+	
+		btVector3 m_scaling;
+
+	public:
+		btStridingMeshInterface() :m_scaling(btScalar(1.),btScalar(1.),btScalar(1.))
+		{
+
+		}
+
+		virtual ~btStridingMeshInterface();
+
+
+
+		virtual void	InternalProcessAllTriangles(btInternalTriangleIndexCallback* callback,const btVector3& aabbMin,const btVector3& aabbMax) const;
+
+		///brute force method to calculate aabb
+		void	calculateAabbBruteForce(btVector3& aabbMin,btVector3& aabbMax);
+
+		/// get read and write access to a subpart of a triangle mesh
+		/// this subpart has a continuous array of vertices and indices
+		/// in this way the mesh can be handled as chunks of memory with striding
+		/// very similar to OpenGL vertexarray support
+		/// make a call to unLockVertexBase when the read and write access is finished	
+		virtual void	getLockedVertexIndexBase(unsigned char **vertexbase, int& numverts,PHY_ScalarType& type, int& stride,unsigned char **indexbase,int & indexstride,int& numfaces,PHY_ScalarType& indicestype,int subpart=0)=0;
+		
+		virtual void	getLockedReadOnlyVertexIndexBase(const unsigned char **vertexbase, int& numverts,PHY_ScalarType& type, int& stride,const unsigned char **indexbase,int & indexstride,int& numfaces,PHY_ScalarType& indicestype,int subpart=0) const=0;
+	
+		/// unLockVertexBase finishes the access to a subpart of the triangle mesh
+		/// make a call to unLockVertexBase when the read and write access (using getLockedVertexIndexBase) is finished
+		virtual void	unLockVertexBase(int subpart)=0;
+
+		virtual void	unLockReadOnlyVertexBase(int subpart) const=0;
+
+
+		/// getNumSubParts returns the number of seperate subparts
+		/// each subpart has a continuous array of vertices and indices
+		virtual int		getNumSubParts() const=0;
+
+		virtual void	preallocateVertices(int numverts)=0;
+		virtual void	preallocateIndices(int numindices)=0;
+
+		virtual bool	hasPremadeAabb() const { return false; }
+		virtual void	setPremadeAabb(const btVector3& aabbMin, const btVector3& aabbMax ) const
+                {
+                        (void) aabbMin;
+                        (void) aabbMax;
+                }
+		virtual void	getPremadeAabb(btVector3* aabbMin, btVector3* aabbMax ) const
+        {
+            (void) aabbMin;
+            (void) aabbMax;
+        }
+
+		const btVector3&	getScaling() const {
+			return m_scaling;
+		}
+		void	setScaling(const btVector3& scaling)
+		{
+			m_scaling = scaling;
+		}
+
+		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	btIntIndexData
+{
+	int	m_value;
+};
+
+struct	btShortIntIndexData
+{
+	short m_value;
+	char m_pad[2];
+};
+
+struct	btShortIntIndexTripletData
+{
+	short	m_values[3];
+	char	m_pad[2];
+};
+
+///do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64
+struct	btMeshPartData
+{
+	btVector3FloatData			*m_vertices3f;
+	btVector3DoubleData			*m_vertices3d;
+
+	btIntIndexData				*m_indices32;
+	btShortIntIndexTripletData	*m_3indices16;
+
+	btShortIntIndexData			*m_indices16;//backwards compatibility
+
+	int                     m_numTriangles;//length of m_indices = m_numTriangles
+	int                     m_numVertices;
+};
+
+
+///do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64
+struct	btStridingMeshInterfaceData
+{
+	btMeshPartData	*m_meshPartsPtr;
+	btVector3FloatData	m_scaling;
+	int	m_numMeshParts;
+	char m_padding[4];
+};
+
+
+
+
+SIMD_FORCE_INLINE	int	btStridingMeshInterface::calculateSerializeBufferSize() const
+{
+	return sizeof(btStridingMeshInterfaceData);
+}
+
+
+
+#endif //STRIDING_MESHINTERFACE_H