libs/glm/detail/_noise.hpp

///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
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/// furnished to do so, subject to the following conditions:
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/// all copies or substantial portions of the Software.
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// THE SOFTWARE.
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/// @ref core
/// @file glm/detail/_noise.hpp
/// @date 2013-12-24 / 2013-12-24
/// @author Christophe Riccio
///////////////////////////////////////////////////////////////////////////////////

#ifndef GLM_DETAIL_NOISE_INCLUDED
#define GLM_DETAIL_NOISE_INCLUDED

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 detail::tvec2<T, P> taylorInvSqrt(detail::tvec2<T, P> const & r)
	{
		return T(1.79284291400159) - T(0.85373472095314) * r;
	}
	
	template <typename T, precision P>
	GLM_FUNC_QUALIFIER detail::tvec3<T, P> taylorInvSqrt(detail::tvec3<T, P> const & r)
	{
		return T(1.79284291400159) - T(0.85373472095314) * r;
	}
	
	template <typename T, precision P>
	GLM_FUNC_QUALIFIER detail::tvec4<T, P> taylorInvSqrt(detail::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 detail::tvec2<T, P> fade(detail::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 detail::tvec3<T, P> fade(detail::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 detail::tvec4<T, P> fade(detail::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

#endif//GLM_DETAIL_NOISE_INCLUDED