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diff --git a/external/include/glm/gtc/reciprocal.hpp b/external/include/glm/gtc/reciprocal.hpp
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+/// @ref gtc_reciprocal
+/// @file glm/gtc/reciprocal.hpp
+///
+/// @see core (dependence)
+///
+/// @defgroup gtc_reciprocal GLM_GTC_reciprocal
+/// @ingroup gtc
+///
+/// @brief Define secant, cosecant and cotangent functions.
+///
+/// <glm/gtc/reciprocal.hpp> need to be included to use these features.
+
+#pragma once
+
+// Dependencies
+#include "../detail/setup.hpp"
+
+#if GLM_MESSAGES == GLM_MESSAGES_ENABLED && !defined(GLM_EXT_INCLUDED)
+#	pragma message("GLM: GLM_GTC_reciprocal extension included")
+#endif
+
+namespace glm
+{
+	/// @addtogroup gtc_reciprocal
+	/// @{
+
+	/// Secant function.
+	/// hypotenuse / adjacent or 1 / cos(x)
+	/// 
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType sec(genType angle);
+
+	/// Cosecant function.
+	/// hypotenuse / opposite or 1 / sin(x)
+	/// 
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType> 
+	GLM_FUNC_DECL genType csc(genType angle);
+		
+	/// Cotangent function.
+	/// adjacent / opposite or 1 / tan(x)
+	/// 
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType cot(genType angle);
+
+	/// Inverse secant function.
+	/// 
+	/// @return Return an angle expressed in radians.
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType asec(genType x);
+
+	/// Inverse cosecant function.
+	/// 
+	/// @return Return an angle expressed in radians.
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType acsc(genType x);
+		
+	/// Inverse cotangent function.
+	/// 
+	/// @return Return an angle expressed in radians.
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType acot(genType x);
+
+	/// Secant hyperbolic function.
+	/// 
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType sech(genType angle);
+
+	/// Cosecant hyperbolic function.
+	/// 
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType csch(genType angle);
+		
+	/// Cotangent hyperbolic function.
+	/// 
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType coth(genType angle);
+
+	/// Inverse secant hyperbolic function.
+	/// 
+	/// @return Return an angle expressed in radians.
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType asech(genType x);
+
+	/// Inverse cosecant hyperbolic function.
+	/// 
+	/// @return Return an angle expressed in radians.
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType acsch(genType x);
+		
+	/// Inverse cotangent hyperbolic function.
+	/// 
+	/// @return Return an angle expressed in radians.
+	/// @tparam genType Floating-point scalar or vector types.
+	/// 
+	/// @see gtc_reciprocal
+	template <typename genType>
+	GLM_FUNC_DECL genType acoth(genType x);
+
+	/// @}
+}//namespace glm
+
+#include "reciprocal.inl"