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diff --git a/src/glm/gtx/closest_point.hpp b/src/glm/gtx/closest_point.hpp
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+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2005-12-30
+// Updated : 2008-10-05
+// Licence : This source is under MIT License
+// File    : glm/gtx/closest_point.hpp
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Dependency:
+// - GLM core
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifndef glm_gtx_closest_point
+#define glm_gtx_closest_point
+
+// Dependency:
+#include "../glm.hpp"
+
+#if(defined(GLM_MESSAGES) && !defined(glm_ext))
+#	pragma message("GLM: GLM_GTX_closest_point extension included")
+#endif
+
+namespace glm{
+namespace gtx{
+namespace closest_point ///< GLM_GTX_closest_point extension: Find the point on a straight line which is the closet of a point.
+{
+	/// \addtogroup gtx_closest_point
+	/// @{
+
+	/// Find the point on a straight line which is the closet of a point. 
+	/// From GLM_GTX_closest_point extension.
+	template <typename T> 
+	detail::tvec3<T> closestPointOnLine(
+		detail::tvec3<T> const & point, 
+		detail::tvec3<T> const & a, 
+		detail::tvec3<T> const & b);
+
+	/// @}
+}// namespace closest_point
+}// namespace gtx
+}// namespace glm
+
+#include "closest_point.inl"
+
+namespace glm{using namespace gtx::closest_point;}
+
+#endif//glm_gtx_closest_point