text: ///////////////////////////////////////////////////////////////////////////////////
  /// OpenGL Mathematics (glm.g-truc.net)
  ///
  /// Copyright (c) 2005 - 2015 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.
  /// 
  /// Restrictions:
  ///		By making use of the Software for military purposes, you choose to make
  ///		a Bunny unhappy.
  /// 
  /// 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 core
  /// @file glm/detail/_noise.hpp
  /// @date 2013-12-24 / 2013-12-24
  /// @author Christophe Riccio
  ///////////////////////////////////////////////////////////////////////////////////
  
  #pragma once
  
  #include "../vec2.hpp"
  #include "../vec3.hpp"
  #include "../vec4.hpp"
  #include "../common.hpp"
  
  namespace glm{
  namespace detail
  {
  	template <typename T>
  	GLM_FUNC_QUALIFIER T mod289(T const & x)
  	{
  		return x - floor(x * static_cast<T>(1.0) / static_cast<T>(289.0)) * static_cast<T>(289.0);
  	}
  
  	template <typename T>
  	GLM_FUNC_QUALIFIER T permute(T const & x)
  	{
  		return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
  	}
  
  	template <typename T, precision P>
  	GLM_FUNC_QUALIFIER tvec2<T, P> permute(tvec2<T, P> const & x)
  	{
  		return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
  	}
  	
  	template <typename T, precision P>
  	GLM_FUNC_QUALIFIER tvec3<T, P> permute(tvec3<T, P> const & x)
  	{
  		return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
  	}
  	
  	template <typename T, precision P>
  	GLM_FUNC_QUALIFIER tvec4<T, P> permute(tvec4<T, P> const & x)
  	{
  		return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
  	}
  /*
  	template <typename T, precision P, template<typename> class vecType>
  	GLM_FUNC_QUALIFIER vecType<T, P> permute(vecType<T, P> const & x)
  	{
  		return mod289(((x * T(34)) + T(1)) * x);
  	}
  */
  	template <typename T>
  	GLM_FUNC_QUALIFIER T taylorInvSqrt(T const & r)
  	{
  		return T(1.79284291400159) - T(0.85373472095314) * r;
  	}
  	
  	template <typename T, precision P>
  	GLM_FUNC_QUALIFIER tvec2<T, P> taylorInvSqrt(tvec2<T, P> const & r)
  	{
  		return T(1.79284291400159) - T(0.85373472095314) * r;
  	}
  	
  	template <typename T, precision P>
  	GLM_FUNC_QUALIFIER tvec3<T, P> taylorInvSqrt(tvec3<T, P> const & r)
  	{
  		return T(1.79284291400159) - T(0.85373472095314) * r;
  	}
  	
  	template <typename T, precision P>
  	GLM_FUNC_QUALIFIER tvec4<T, P> taylorInvSqrt(tvec4<T, P> const & r)
  	{
  		return T(1.79284291400159) - T(0.85373472095314) * r;
  	}
  /*
  	template <typename T, precision P, template<typename> class vecType>
  	GLM_FUNC_QUALIFIER vecType<T, P> taylorInvSqrt(vecType<T, P> const & r)
  	{
  		return T(1.79284291400159) - T(0.85373472095314) * r;
  	}
  */
  	
  	template <typename T, precision P>
  	GLM_FUNC_QUALIFIER tvec2<T, P> fade(tvec2<T, P> const & t)
  	{
  		return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
  	}
  	
  	template <typename T, precision P>
  	GLM_FUNC_QUALIFIER tvec3<T, P> fade(tvec3<T, P> const & t)
  	{
  		return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
  	}
  	
  	template <typename T, precision P>
  	GLM_FUNC_QUALIFIER tvec4<T, P> fade(tvec4<T, P> const & t)
  	{
  		return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
  	}
  /*
  	template <typename T, precision P, template <typename> class vecType>
  	GLM_FUNC_QUALIFIER vecType<T, P> fade(vecType<T, P> const & t)
  	{
  		return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
  	}
  */
  }//namespace detail
  }//namespace glm
  
  