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diff --git a/thirdparty/bullet/src/BulletCollision/NarrowPhaseCollision/btConvexCast.h b/thirdparty/bullet/src/BulletCollision/NarrowPhaseCollision/btConvexCast.h
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+++ b/thirdparty/bullet/src/BulletCollision/NarrowPhaseCollision/btConvexCast.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 BT_CONVEX_CAST_H
+#define BT_CONVEX_CAST_H
+
+#include "LinearMath/btTransform.h"
+#include "LinearMath/btVector3.h"
+#include "LinearMath/btScalar.h"
+class btMinkowskiSumShape;
+#include "LinearMath/btIDebugDraw.h"
+
+/// btConvexCast is an interface for Casting
+class btConvexCast
+{
+public:
+
+
+	virtual ~btConvexCast();
+
+	///RayResult stores the closest result
+	/// alternatively, add a callback method to decide about closest/all results
+	struct	CastResult
+	{
+		//virtual bool	addRayResult(const btVector3& normal,btScalar	fraction) = 0;
+				
+		virtual void	DebugDraw(btScalar	fraction) {(void)fraction;}
+		virtual void	drawCoordSystem(const btTransform& trans) {(void)trans;}
+		virtual void	reportFailure(int errNo, int numIterations) {(void)errNo;(void)numIterations;}
+		CastResult()
+			:m_fraction(btScalar(BT_LARGE_FLOAT)),
+			m_debugDrawer(0),
+			m_allowedPenetration(btScalar(0))
+		{
+		}
+
+
+		virtual ~CastResult() {};
+
+		btTransform	m_hitTransformA;
+		btTransform	m_hitTransformB;
+		btVector3	m_normal;
+		btVector3   m_hitPoint;
+		btScalar	m_fraction; //input and output
+		btIDebugDraw* m_debugDrawer;
+		btScalar	m_allowedPenetration;
+
+	};
+
+
+	/// cast a convex against another convex object
+	virtual bool	calcTimeOfImpact(
+					const btTransform& fromA,
+					const btTransform& toA,
+					const btTransform& fromB,
+					const btTransform& toB,
+					CastResult& result) = 0;
+};
+
+#endif //BT_CONVEX_CAST_H