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diff --git a/extern/bullet2/src/BulletSoftBody/btSoftBodySolverVertexBuffer.h b/extern/bullet2/src/BulletSoftBody/btSoftBodySolverVertexBuffer.h
new file mode 100644
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+++ b/extern/bullet2/src/BulletSoftBody/btSoftBodySolverVertexBuffer.h
@@ -0,0 +1,165 @@
+/*
+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_SOFT_BODY_SOLVER_VERTEX_BUFFER_H
+#define BT_SOFT_BODY_SOLVER_VERTEX_BUFFER_H
+
+
+class btVertexBufferDescriptor
+{
+public:
+	enum BufferTypes
+	{
+		CPU_BUFFER,
+		DX11_BUFFER,
+		OPENGL_BUFFER
+	};
+
+protected:	
+
+	bool m_hasVertexPositions;
+	bool m_hasNormals;
+
+	int m_vertexOffset;
+	int m_vertexStride;
+
+	int m_normalOffset;
+	int m_normalStride;
+
+public:
+	btVertexBufferDescriptor()
+	{
+		m_hasVertexPositions = false;
+		m_hasNormals = false;
+		m_vertexOffset = 0;
+		m_vertexStride = 0;
+		m_normalOffset = 0;
+		m_normalStride = 0;
+	}
+
+	virtual ~btVertexBufferDescriptor()
+	{
+
+	}
+
+	virtual bool hasVertexPositions() const
+	{
+		return m_hasVertexPositions;
+	}
+
+	virtual bool hasNormals() const
+	{
+		return m_hasNormals;
+	}
+
+	/**
+	 * Return the type of the vertex buffer descriptor.
+	 */
+	virtual BufferTypes getBufferType() const = 0;
+
+	/**
+	 * Return the vertex offset in floats from the base pointer.
+	 */
+	virtual int getVertexOffset() const
+	{
+		return m_vertexOffset;
+	}
+
+	/**
+	 * Return the vertex stride in number of floats between vertices.
+	 */
+	virtual int getVertexStride() const
+	{
+		return m_vertexStride;
+	}
+
+	/**
+	 * Return the vertex offset in floats from the base pointer.
+	 */
+	virtual int getNormalOffset() const
+	{
+		return m_normalOffset;
+	}
+
+	/**
+	 * Return the vertex stride in number of floats between vertices.
+	 */
+	virtual int getNormalStride() const
+	{
+		return m_normalStride;
+	}
+};
+
+
+class btCPUVertexBufferDescriptor : public btVertexBufferDescriptor
+{
+protected:
+	float *m_basePointer;
+
+public:
+	/**
+	 * vertexBasePointer is pointer to beginning of the buffer.
+	 * vertexOffset is the offset in floats to the first vertex.
+	 * vertexStride is the stride in floats between vertices.
+	 */
+	btCPUVertexBufferDescriptor( float *basePointer, int vertexOffset, int vertexStride )
+	{
+		m_basePointer = basePointer;
+		m_vertexOffset = vertexOffset;
+		m_vertexStride = vertexStride;
+		m_hasVertexPositions = true;
+	}
+
+	/**
+	 * vertexBasePointer is pointer to beginning of the buffer.
+	 * vertexOffset is the offset in floats to the first vertex.
+	 * vertexStride is the stride in floats between vertices.
+	 */
+	btCPUVertexBufferDescriptor( float *basePointer, int vertexOffset, int vertexStride, int normalOffset, int normalStride )
+	{
+		m_basePointer = basePointer;
+
+		m_vertexOffset = vertexOffset;
+		m_vertexStride = vertexStride;
+		m_hasVertexPositions = true;
+
+		m_normalOffset = normalOffset;
+		m_normalStride = normalStride;
+		m_hasNormals = true;
+	}
+
+	virtual ~btCPUVertexBufferDescriptor()
+	{
+
+	}
+
+	/**
+	 * Return the type of the vertex buffer descriptor.
+	 */
+	virtual BufferTypes getBufferType() const
+	{
+		return CPU_BUFFER;
+	}
+
+	/**
+	 * Return the base pointer in memory to the first vertex.
+	 */
+	virtual float *getBasePointer() const
+	{
+		return m_basePointer;
+	}
+};
+
+#endif // #ifndef BT_SOFT_BODY_SOLVER_VERTEX_BUFFER_H