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+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Based on the work of Stefan Gustavson and Ashima Arts on "webgl-noise": 
+// https://github.com/ashima/webgl-noise 
+// Following Stefan Gustavson's paper "Simplex noise demystified": 
+// http://www.itn.liu.se/~stegu/simplexnoise/simplexnoise.pdf
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2011-04-21
+// Updated : 2011-04-21
+// Licence : This source is under MIT License
+// File    : glm/gtx/noise.hpp
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Dependency:
+// - GLM core
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifndef glm_gtx_noise
+#define glm_gtx_noise
+
+// Dependency:
+#include "../glm.hpp"
+
+#if(defined(GLM_MESSAGES) && !defined(glm_ext))
+#	pragma message("GLM: GLM_GTX_noise extension included")
+#endif
+
+namespace glm{
+namespace gtx{
+namespace noise	///< GLM_GTX_noise extension: Comparison functions for a user defined epsilon values.
+{
+	/// \addtogroup gtx_noise
+	/// @{
+
+	//! Classic perlin noise.
+	//! From GLM_GTX_noise extension.
+	template <typename T, template<typename> class vecType> 
+    T perlin(
+		vecType<T> const & p);
+		
+	//! Periodic perlin noise.
+	//! From GLM_GTX_noise extension.
+	template <typename T, template<typename> class vecType> 
+    T perlin(
+		vecType<T> const & p, 
+		vecType<T> const & rep);
+
+	//! Simplex noise.
+	//! From GLM_GTX_noise extension.
+	template <typename T, template<typename> class vecType> 
+    T simplex(
+		vecType<T> const & p);
+
+	/// @}
+}//namespace noise
+}//namespace gtx
+}//namespace glm
+
+#include "noise.inl"
+
+namespace glm{using namespace gtx::noise;}
+
+#endif//glm_gtx_noise