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diff --git a/src/glm/gtx/closest_point.inl b/src/glm/gtx/closest_point.inl
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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.inl
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifndef glm_gtx_closest_point
+#define glm_gtx_closest_point
+
+namespace glm{
+namespace gtx{
+namespace closest_point{
+
+template <typename valType> 
+GLM_FUNC_QUALIFIER detail::tvec3<valType> closestPointOnLine
+(
+	detail::tvec3<valType> const & point, 
+	detail::tvec3<valType> const & a, 
+	detail::tvec3<valType> const & b
+)
+{
+    valType LineLength = distance(a, b);
+    detail::tvec3<valType> Vector = point - a;
+    detail::tvec3<valType> LineDirection = (b - a) / LineLength;
+
+    // Project Vector to LineDirection to get the distance of point from a
+    valType Distance = dot(Vector, LineDirection);
+
+    if(Distance <= valType(0)) return a;
+    if(Distance >= LineLength) return b;
+    return a + LineDirection * Distance;
+}
+
+}//namespace closest_point
+}//namespace gtx
+}//namespace glm
+
+#endif//glm_gtx_closest_point