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diff --git a/thirdparty/bullet/BulletCollision/CollisionDispatch/btBoxBoxDetector.h b/thirdparty/bullet/BulletCollision/CollisionDispatch/btBoxBoxDetector.h
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+++ b/thirdparty/bullet/BulletCollision/CollisionDispatch/btBoxBoxDetector.h
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+/*
+ * Box-Box collision detection re-distributed under the ZLib license with permission from Russell L. Smith
+ * Original version is from Open Dynamics Engine, Copyright (C) 2001,2002 Russell L. Smith.
+ * All rights reserved.  Email: russ@q12.org   Web: www.q12.org
+
+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_BOX_BOX_DETECTOR_H
+#define BT_BOX_BOX_DETECTOR_H
+
+
+class btBoxShape;
+#include "BulletCollision/NarrowPhaseCollision/btDiscreteCollisionDetectorInterface.h"
+
+
+/// btBoxBoxDetector wraps the ODE box-box collision detector
+/// re-distributed under the Zlib license with permission from Russell L. Smith
+struct btBoxBoxDetector : public btDiscreteCollisionDetectorInterface
+{
+	const btBoxShape* m_box1;
+	const btBoxShape* m_box2;
+
+public:
+
+	btBoxBoxDetector(const btBoxShape* box1,const btBoxShape* box2);
+
+	virtual ~btBoxBoxDetector() {};
+
+	virtual void	getClosestPoints(const ClosestPointInput& input,Result& output,class btIDebugDraw* debugDraw,bool swapResults=false);
+
+};
+
+#endif //BT_BOX_BOX_DETECTOR_H