_noise.hpp

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#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, qualifier P>
        GLM_FUNC_QUALIFIER vec<2, T, P> permute(vec<2, T, P> const & x)
        {
                return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
        }
        
        template<typename T, qualifier P>
        GLM_FUNC_QUALIFIER vec<3, T, P> permute(vec<3, T, P> const & x)
        {
                return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
        }
        
        template<typename T, qualifier P>
        GLM_FUNC_QUALIFIER vec<4, T, P> permute(vec<4, T, P> const & x)
        {
                return mod289(((x * static_cast<T>(34)) + static_cast<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, qualifier P>
        GLM_FUNC_QUALIFIER vec<2, T, P> taylorInvSqrt(vec<2, T, P> const & r)
        {
                return T(1.79284291400159) - T(0.85373472095314) * r;
        }
        
        template<typename T, qualifier P>
        GLM_FUNC_QUALIFIER vec<3, T, P> taylorInvSqrt(vec<3, T, P> const & r)
        {
                return T(1.79284291400159) - T(0.85373472095314) * r;
        }
        
        template<typename T, qualifier P>
        GLM_FUNC_QUALIFIER vec<4, T, P> taylorInvSqrt(vec<4, T, P> const & r)
        {
                return T(1.79284291400159) - T(0.85373472095314) * r;
        }

        template<typename T, qualifier P>
        GLM_FUNC_QUALIFIER vec<2, T, P> fade(vec<2, T, P> const & t)
        {
                return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
        }
        
        template<typename T, qualifier P>
        GLM_FUNC_QUALIFIER vec<3, T, P> fade(vec<3, T, P> const & t)
        {
                return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
        }
        
        template<typename T, qualifier P>
        GLM_FUNC_QUALIFIER vec<4, T, P> fade(vec<4, T, P> const & t)
        {
                return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
        }
}//namespace detail
}//namespace glm