rotating skyboxgit add -A

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diff --git a/glm-master/glm/ext/scalar_constants.hpp b/glm-master/glm/ext/scalar_constants.hpp
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+/// @ref ext_scalar_constants
+/// @file glm/ext/scalar_constants.hpp
+///
+/// @defgroup ext_scalar_constants GLM_EXT_scalar_constants
+/// @ingroup ext
+///
+/// Provides a list of constants and precomputed useful values.
+///
+/// Include <glm/ext/scalar_constants.hpp> to use the features of this extension.
+
+#pragma once
+
+// Dependencies
+#include "../detail/setup.hpp"
+
+#if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
+#	pragma message("GLM: GLM_EXT_scalar_constants extension included")
+#endif
+
+namespace glm
+{
+	/// @addtogroup ext_scalar_constants
+	/// @{
+
+	/// Return the epsilon constant for floating point types.
+	template<typename genType>
+	GLM_FUNC_DECL GLM_CONSTEXPR genType epsilon();
+
+	/// Return the pi constant for floating point types.
+	template<typename genType>
+	GLM_FUNC_DECL GLM_CONSTEXPR genType pi();
+
+	/// Return the value of cos(1 / 2) for floating point types.
+	template<typename genType>
+	GLM_FUNC_DECL GLM_CONSTEXPR genType cos_one_over_two();
+
+	/// @}
+} //namespace glm
+
+#include "scalar_constants.inl"