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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
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