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+///////////////////////////////////////////////////////////////////////////////////
+/// OpenGL Mathematics (glm.g-truc.net)
+///
+/// Copyright (c) 2005 - 2013 G-Truc Creation (www.g-truc.net)
+/// Permission is hereby granted, free of charge, to any person obtaining a copy
+/// of this software and associated documentation files (the "Software"), to deal
+/// in the Software without restriction, including without limitation the rights
+/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+/// copies of the Software, and to permit persons to whom the Software is
+/// furnished to do so, subject to the following conditions:
+/// 
+/// The above copyright notice and this permission notice shall be included in
+/// all copies or substantial portions of the Software.
+/// 
+/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+/// THE SOFTWARE.
+///
+/// @ref gtx_fast_trigonometry
+/// @file glm/gtx/fast_trigonometry.hpp
+/// @date 2006-01-08 / 2011-06-07
+/// @author Christophe Riccio
+///
+/// @see core (dependence)
+///
+/// @defgroup gtx_fast_trigonometry GLM_GTX_fast_trigonometry
+/// @ingroup gtx
+/// 
+/// @brief Fast but less accurate implementations of trigonometric functions.
+/// 
+/// <glm/gtx/fast_trigonometry.hpp> need to be included to use these functionalities.
+///////////////////////////////////////////////////////////////////////////////////
+
+#ifndef GLM_GTX_fast_trigonometry
+#define GLM_GTX_fast_trigonometry GLM_VERSION
+
+// Dependency:
+#include "../glm.hpp"
+
+#if(defined(GLM_MESSAGES) && !defined(glm_ext))
+#	pragma message("GLM: GLM_GTX_fast_trigonometry extension included")
+#endif
+
+namespace glm
+{
+	/// @addtogroup gtx_fast_trigonometry
+	/// @{
+
+	//! Faster than the common sin function but less accurate. 
+	//! Defined between -2pi and 2pi. 
+	//! From GLM_GTX_fast_trigonometry extension.
+    template <typename T> 
+	T fastSin(const T& angle);
+
+    //! Faster than the common cos function but less accurate.
+	//! Defined between -2pi and 2pi.
+	//! From GLM_GTX_fast_trigonometry extension.
+	template <typename T> 
+	T fastCos(const 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> 
+	T fastTan(const 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> 
+	T fastAsin(const 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> 
+	T fastAcos(const 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> 
+	T fastAtan(const T& y, const 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> 
+	T fastAtan(const T& angle);
+
+	/// @}
+}//namespace glm
+
+#include "fast_trigonometry.inl"
+
+#endif//GLM_GTX_fast_trigonometry