Add ktx

ktx/other_include/glm/gtx/normal.hpp

@@ -0,0 +1,43 @@
+/// @ref gtx_normal
+/// @file glm/gtx/normal.hpp
+///
+/// @see core (dependence)
+/// @see gtx_extented_min_max (dependence)
+///
+/// @defgroup gtx_normal GLM_GTX_normal
+/// @ingroup gtx
+///
+/// @brief Compute the normal of a triangle.
+///
+/// <glm/gtx/normal.hpp> need to be included to use these functionalities.
+
+#pragma once
+
+// Dependency:
+#include "../glm.hpp"
+
+#ifndef GLM_ENABLE_EXPERIMENTAL
+#	error "GLM: GLM_GTX_normal is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it."
+#endif
+
+#if GLM_MESSAGES == GLM_MESSAGES_ENABLED && !defined(GLM_EXT_INCLUDED)
+#	pragma message("GLM: GLM_GTX_normal extension included")
+#endif
+
+namespace glm
+{
+	/// @addtogroup gtx_normal
+	/// @{
+
+	//! Computes triangle normal from triangle points. 
+	//! From GLM_GTX_normal extension.
+	template<typename T, precision P> 
+	GLM_FUNC_DECL vec<3, T, P> triangleNormal(
+		vec<3, T, P> const & p1, 
+		vec<3, T, P> const & p2, 
+		vec<3, T, P> const & p3);
+
+	/// @}
+}//namespace glm
+
+#include "normal.inl"