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diff --git a/extern/bullet2/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuMinkowskiPenetrationDepthSolver.h b/extern/bullet2/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuMinkowskiPenetrationDepthSolver.h
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+++ b/extern/bullet2/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuMinkowskiPenetrationDepthSolver.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 MINKOWSKI_PENETRATION_DEPTH_SOLVER_H
+#define MINKOWSKI_PENETRATION_DEPTH_SOLVER_H
+
+
+#include "BulletCollision/NarrowPhaseCollision/btConvexPenetrationDepthSolver.h"
+
+class btStackAlloc;
+class btIDebugDraw;
+class btVoronoiSimplexSolver;
+class btConvexShape;
+
+///MinkowskiPenetrationDepthSolver implements bruteforce penetration depth estimation.
+///Implementation is based on sampling the depth using support mapping, and using GJK step to get the witness points.
+class SpuMinkowskiPenetrationDepthSolver : public btConvexPenetrationDepthSolver
+{
+public:
+	SpuMinkowskiPenetrationDepthSolver() {}
+	virtual ~SpuMinkowskiPenetrationDepthSolver() {};
+
+		virtual bool calcPenDepth( btSimplexSolverInterface& simplexSolver,
+		const btConvexShape* convexA,const btConvexShape* convexB,
+					const btTransform& transA,const btTransform& transB,
+				btVector3& v, btVector3& pa, btVector3& pb,
+				class btIDebugDraw* debugDraw,btStackAlloc* stackAlloc
+				);
+
+
+};
+
+
+#endif //MINKOWSKI_PENETRATION_DEPTH_SOLVER_H
+