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diff --git a/thirdparty/bullet/src/Bullet3OpenCL/NarrowphaseCollision/b3TriangleCallback.h b/thirdparty/bullet/src/Bullet3OpenCL/NarrowphaseCollision/b3TriangleCallback.h
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+++ b/thirdparty/bullet/src/Bullet3OpenCL/NarrowphaseCollision/b3TriangleCallback.h
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+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2009 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 B3_TRIANGLE_CALLBACK_H
+#define B3_TRIANGLE_CALLBACK_H
+
+#include "Bullet3Common/b3Vector3.h"
+
+
+///The b3TriangleCallback provides a callback for each overlapping triangle when calling processAllTriangles.
+///This callback is called by processAllTriangles for all b3ConcaveShape derived class, such as  b3BvhTriangleMeshShape, b3StaticPlaneShape and b3HeightfieldTerrainShape.
+class b3TriangleCallback
+{
+public:
+
+	virtual ~b3TriangleCallback();
+	virtual void processTriangle(b3Vector3* triangle, int partId, int triangleIndex) = 0;
+};
+
+class b3InternalTriangleIndexCallback
+{
+public:
+
+	virtual ~b3InternalTriangleIndexCallback();
+	virtual void internalProcessTriangleIndex(b3Vector3* triangle,int partId,int  triangleIndex) = 0;
+};
+
+
+
+#endif //B3_TRIANGLE_CALLBACK_H