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diff --git a/extern/bullet2/src/BulletCollision/NarrowPhaseCollision/btGjkCollisionDescription.h b/extern/bullet2/src/BulletCollision/NarrowPhaseCollision/btGjkCollisionDescription.h
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+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2014 Erwin Coumans http://bulletphysics.org
+
+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 GJK_COLLISION_DESCRIPTION_H
+#define GJK_COLLISION_DESCRIPTION_H
+
+#include "LinearMath/btVector3.h"
+
+struct btGjkCollisionDescription
+{
+    btVector3	m_firstDir;
+    int			m_maxGjkIterations;
+    btScalar	m_maximumDistanceSquared;
+    btScalar	m_gjkRelError2;
+    btGjkCollisionDescription()
+    :m_firstDir(0,1,0),
+    m_maxGjkIterations(1000),
+    m_maximumDistanceSquared(1e30f),
+    m_gjkRelError2(1.0e-6)
+    {
+    }
+    virtual ~btGjkCollisionDescription()
+    {
+    }
+};
+
+#endif //GJK_COLLISION_DESCRIPTION_H
+