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diff --git a/src/glm/gtx/extend.hpp b/src/glm/gtx/extend.hpp
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+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2006-01-07
+// Updated : 2006-11-13
+// Licence : This source is under MIT License
+// File    : glm/gtx/extend.hpp
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Dependency:
+// - GLM core
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifndef glm_gtx_extend
+#define glm_gtx_extend
+
+// Dependency:
+#include "../glm.hpp"
+
+#if(defined(GLM_MESSAGES) && !defined(glm_ext))
+#	pragma message("GLM: GLM_GTX_extend extension included")
+#endif
+
+namespace glm{
+namespace gtx{
+namespace extend ///< GLM_GTX_extend extension: Extend a position from a source to a position at a defined length.
+{
+	/// \addtogroup gtx_extend
+	/// @{
+
+	//! Extends of Length the Origin position using the (Source - Origin) direction.
+	//! From GLM_GTX_extend extension.
+	template <typename genType> 
+	genType extend(
+		genType const & Origin, 
+		genType const & Source, 
+		typename genType::value_type const Length);
+
+	/// @}
+}//namespace extend
+}//namespace gtx
+}//namespace glm
+
+#include "extend.inl"
+
+namespace glm{using namespace gtx::extend;}
+
+#endif//glm_gtx_extend