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+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2013 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2005-12-21
+// Updated : 2011-06-07
+// Licence : This source is under MIT License
+// File : glm/gtx/normal.inl
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+namespace glm
+{
+ template <typename T>
+ GLM_FUNC_QUALIFIER detail::tvec3<T> triangleNormal
+ (
+ detail::tvec3<T> const & p1,
+ detail::tvec3<T> const & p2,
+ detail::tvec3<T> const & p3
+ )
+ {
+ return normalize(cross(p1 - p2, p1 - p3));
+ }
+}//namespace glm