_noise.hpp

#pragma once

#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 Q>
    GLM_FUNC_QUALIFIER vec<2, T, Q> permute(vec<2, T, Q> const& x)
    {
        return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
    }

    template<typename T, qualifier Q>
    GLM_FUNC_QUALIFIER vec<3, T, Q> permute(vec<3, T, Q> const& x)
    {
        return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
    }

    template<typename T, qualifier Q>
    GLM_FUNC_QUALIFIER vec<4, T, Q> permute(vec<4, T, Q> 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 static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
    }

    template<typename T, qualifier Q>
    GLM_FUNC_QUALIFIER vec<2, T, Q> taylorInvSqrt(vec<2, T, Q> const& r)
    {
        return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
    }

    template<typename T, qualifier Q>
    GLM_FUNC_QUALIFIER vec<3, T, Q> taylorInvSqrt(vec<3, T, Q> const& r)
    {
        return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
    }

    template<typename T, qualifier Q>
    GLM_FUNC_QUALIFIER vec<4, T, Q> taylorInvSqrt(vec<4, T, Q> const& r)
    {
        return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
    }

    template<typename T, qualifier Q>
    GLM_FUNC_QUALIFIER vec<2, T, Q> fade(vec<2, T, Q> const& t)
    {
        return (t * t * t) * (t * (t * static_cast<T>(6) - static_cast<T>(15)) + static_cast<T>(10));
    }

    template<typename T, qualifier Q>
    GLM_FUNC_QUALIFIER vec<3, T, Q> fade(vec<3, T, Q> const& t)
    {
        return (t * t * t) * (t * (t * static_cast<T>(6) - static_cast<T>(15)) + static_cast<T>(10));
    }

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