rotating skyboxgit add -A

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diff --git a/glm-master/glm/gtx/fast_trigonometry.hpp b/glm-master/glm/gtx/fast_trigonometry.hpp
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+++ b/glm-master/glm/gtx/fast_trigonometry.hpp
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+/// @ref gtx_fast_trigonometry
+/// @file glm/gtx/fast_trigonometry.hpp
+///
+/// @see core (dependence)
+///
+/// @defgroup gtx_fast_trigonometry GLM_GTX_fast_trigonometry
+/// @ingroup gtx
+///
+/// Include <glm/gtx/fast_trigonometry.hpp> to use the features of this extension.
+///
+/// Fast but less accurate implementations of trigonometric functions.
+
+#pragma once
+
+// Dependency:
+#include "../gtc/constants.hpp"
+
+#if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
+#	ifndef GLM_ENABLE_EXPERIMENTAL
+#		pragma message("GLM: GLM_GTX_fast_trigonometry 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.")
+#	else
+#		pragma message("GLM: GLM_GTX_fast_trigonometry extension included")
+#	endif
+#endif
+
+namespace glm
+{
+	/// @addtogroup gtx_fast_trigonometry
+	/// @{
+
+	/// Wrap an angle to [0 2pi[
+	/// From GLM_GTX_fast_trigonometry extension.
+	template<typename T>
+	GLM_FUNC_DECL T wrapAngle(T angle);
+
+	/// Faster than the common sin function but less accurate.
+	/// From GLM_GTX_fast_trigonometry extension.
+	template<typename T>
+	GLM_FUNC_DECL T fastSin(T angle);
+
+	/// Faster than the common cos function but less accurate.
+	/// From GLM_GTX_fast_trigonometry extension.
+	template<typename T>
+	GLM_FUNC_DECL T fastCos(T angle);
+
+	/// Faster than the common tan function but less accurate.
+	/// Defined between -2pi and 2pi.
+	/// From GLM_GTX_fast_trigonometry extension.
+	template<typename T>
+	GLM_FUNC_DECL T fastTan(T angle);
+
+	/// Faster than the common asin function but less accurate.
+	/// Defined between -2pi and 2pi.
+	/// From GLM_GTX_fast_trigonometry extension.
+	template<typename T>
+	GLM_FUNC_DECL T fastAsin(T angle);
+
+	/// Faster than the common acos function but less accurate.
+	/// Defined between -2pi and 2pi.
+	/// From GLM_GTX_fast_trigonometry extension.
+	template<typename T>
+	GLM_FUNC_DECL T fastAcos(T angle);
+
+	/// Faster than the common atan function but less accurate.
+	/// Defined between -2pi and 2pi.
+	/// From GLM_GTX_fast_trigonometry extension.
+	template<typename T>
+	GLM_FUNC_DECL T fastAtan(T y, T x);
+
+	/// Faster than the common atan function but less accurate.
+	/// Defined between -2pi and 2pi.
+	/// From GLM_GTX_fast_trigonometry extension.
+	template<typename T>
+	GLM_FUNC_DECL T fastAtan(T angle);
+
+	/// @}
+}//namespace glm
+
+#include "fast_trigonometry.inl"