scalar_common.inl

namespace glm
{
    template<typename T>
    GLM_FUNC_QUALIFIER T min(T a, T b, T c)
    {
        return glm::min(glm::min(a, b), c);
    }
 
    template<typename T>
    GLM_FUNC_QUALIFIER T min(T a, T b, T c, T d)
    {
        return glm::min(glm::min(a, b), glm::min(c, d));
    }
 
    template<typename T>
    GLM_FUNC_QUALIFIER T max(T a, T b, T c)
    {
        return glm::max(glm::max(a, b), c);
    }
 
    template<typename T>
    GLM_FUNC_QUALIFIER T max(T a, T b, T c, T d)
    {
        return glm::max(glm::max(a, b), glm::max(c, d));
    }
 
#   if GLM_HAS_CXX11_STL
        using std::fmin;
#   else
        template<typename T>
        GLM_FUNC_QUALIFIER T fmin(T a, T b)
        {
            GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'fmin' only accept floating-point input");
 
            if (isnan(a))
                return b;
            return min(a, b);
        }
#   endif
 
    template<typename T>
    GLM_FUNC_QUALIFIER T fmin(T a, T b, T c)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'fmin' only accept floating-point input");
 
        if (isnan(a))
            return fmin(b, c);
        if (isnan(b))
            return fmin(a, c);
        if (isnan(c))
            return min(a, b);
        return min(a, b, c);
    }
 
    template<typename T>
    GLM_FUNC_QUALIFIER T fmin(T a, T b, T c, T d)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'fmin' only accept floating-point input");
 
        if (isnan(a))
            return fmin(b, c, d);
        if (isnan(b))
            return min(a, fmin(c, d));
        if (isnan(c))
            return fmin(min(a, b), d);
        if (isnan(d))
            return min(a, b, c);
        return min(a, b, c, d);
    }
 
 
#   if GLM_HAS_CXX11_STL
        using std::fmax;
#   else
        template<typename T>
        GLM_FUNC_QUALIFIER T fmax(T a, T b)
        {
            GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'fmax' only accept floating-point input");
 
            if (isnan(a))
                return b;
            return max(a, b);
        }
#   endif
 
    template<typename T>
    GLM_FUNC_QUALIFIER T fmax(T a, T b, T c)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'fmax' only accept floating-point input");
 
        if (isnan(a))
            return fmax(b, c);
        if (isnan(b))
            return fmax(a, c);
        if (isnan(c))
            return max(a, b);
        return max(a, b, c);
    }
 
    template<typename T>
    GLM_FUNC_QUALIFIER T fmax(T a, T b, T c, T d)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'fmax' only accept floating-point input");
 
        if (isnan(a))
            return fmax(b, c, d);
        if (isnan(b))
            return max(a, fmax(c, d));
        if (isnan(c))
            return fmax(max(a, b), d);
        if (isnan(d))
            return max(a, b, c);
        return max(a, b, c, d);
    }
 
    // fclamp
    template<typename genType>
    GLM_FUNC_QUALIFIER genType fclamp(genType x, genType minVal, genType maxVal)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'fclamp' only accept floating-point or integer inputs");
        return fmin(fmax(x, minVal), maxVal);
    }
 
    template<typename genType>
    GLM_FUNC_QUALIFIER genType clamp(genType const& Texcoord)
    {
        return glm::clamp(Texcoord, static_cast<genType>(0), static_cast<genType>(1));
    }
 
    template<typename genType>
    GLM_FUNC_QUALIFIER genType repeat(genType const& Texcoord)
    {
        return glm::fract(Texcoord);
    }
 
    template<typename genType>
    GLM_FUNC_QUALIFIER genType mirrorClamp(genType const& Texcoord)
    {
        return glm::fract(glm::abs(Texcoord));
    }
 
    template<typename genType>
    GLM_FUNC_QUALIFIER genType mirrorRepeat(genType const& Texcoord)
    {
        genType const Abs = glm::abs(Texcoord);
        genType const Clamp = glm::mod(glm::floor(Abs), static_cast<genType>(2));
        genType const Floor = glm::floor(Abs);
        genType const Rest = Abs - Floor;
        genType const Mirror = Clamp + Rest;
        return mix(Rest, static_cast<genType>(1) - Rest, Mirror >= static_cast<genType>(1));
    }
}//namespace glm