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diff --git a/extern/bullet2/src/BulletCollision/CollisionShapes/btConvexShape.h b/extern/bullet2/src/BulletCollision/CollisionShapes/btConvexShape.h
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+++ b/extern/bullet2/src/BulletCollision/CollisionShapes/btConvexShape.h
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+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/
+
+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 CONVEX_SHAPE_INTERFACE1
+#define CONVEX_SHAPE_INTERFACE1
+
+#include "btCollisionShape.h"
+
+#include "LinearMath/btVector3.h"
+#include "LinearMath/btTransform.h"
+#include "LinearMath/btMatrix3x3.h"
+#include <vector>
+#include "BulletCollision/CollisionShapes/btCollisionMargin.h"
+
+//todo: get rid of this btConvexCastResult thing!
+struct btConvexCastResult;
+
+
+/// btConvexShape is an abstract shape interface.
+/// The explicit part provides plane-equations, the implicit part provides GetClosestPoint interface.
+/// used in combination with GJK or btConvexCast
+class btConvexShape : public btCollisionShape
+{
+	
+protected:
+
+	//local scaling. collisionMargin is not scaled !
+	btVector3	m_localScaling;
+
+	btVector3	m_implicitShapeDimensions;
+	
+	btScalar	m_collisionMargin;
+
+public:
+	btConvexShape();
+
+	virtual btVector3	localGetSupportingVertex(const btVector3& vec)const;
+	virtual btVector3	localGetSupportingVertexWithoutMargin(const btVector3& vec) const= 0;
+	
+	//notice that the vectors should be unit length
+	virtual void	batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const= 0;
+
+	const btVector3& getImplicitShapeDimensions() const
+	{
+		return m_implicitShapeDimensions;
+	}
+
+	///getAabb's default implementation is brute force, expected derived classes to implement a fast dedicated version
+	void getAabb(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const
+	{
+		getAabbSlow(t,aabbMin,aabbMax);
+	}
+
+
+	
+	virtual void getAabbSlow(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const;
+
+
+	virtual void	setLocalScaling(const btVector3& scaling);
+	virtual const btVector3& getLocalScaling() const 
+	{
+		return m_localScaling;
+	}
+
+
+	virtual void	setMargin(float margin)
+	{
+		m_collisionMargin = margin;
+	}
+	virtual float	getMargin() const
+	{
+		return m_collisionMargin;
+	}
+
+
+};
+
+
+
+#endif //CONVEX_SHAPE_INTERFACE1