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