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diff --git a/extern/bullet2/src/BulletCollision/NarrowPhaseCollision/btGjkEpaPenetrationDepthSolver.h b/extern/bullet2/src/BulletCollision/NarrowPhaseCollision/btGjkEpaPenetrationDepthSolver.h
new file mode 100644
index 00000000000..a7332a7a51a
--- /dev/null
+++ b/extern/bullet2/src/BulletCollision/NarrowPhaseCollision/btGjkEpaPenetrationDepthSolver.h
@@ -0,0 +1,39 @@
+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/
+
+EPA Copyright (c) Ricardo Padrela 2006 
+
+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_GJP_EPA_PENETRATION_DEPTH_H
+#define BT_GJP_EPA_PENETRATION_DEPTH_H
+
+#include "btConvexPenetrationDepthSolver.h"
+
+///EpaPenetrationDepthSolver uses the Expanding Polytope Algorithm to
+///calculate the penetration depth between two convex shapes.
+class btGjkEpaPenetrationDepthSolver : public btConvexPenetrationDepthSolver
+{
+	public :
+
+		bool			calcPenDepth( btSimplexSolverInterface& simplexSolver,
+									  btConvexShape* pConvexA, btConvexShape* pConvexB,
+									  const btTransform& transformA, const btTransform& transformB,
+									  btVector3& v, btPoint3& wWitnessOnA, btPoint3& wWitnessOnB,
+									  class btIDebugDraw* debugDraw );
+
+	private :
+
+};
+
+#endif	// BT_GJP_EPA_PENETRATION_DEPTH_H
+