128 lines
4.1 KiB
C++
128 lines
4.1 KiB
C++
/// @ref gtx_component_wise
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#include <limits>
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namespace glm{
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namespace detail
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{
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template<length_t L, typename T, typename floatType, qualifier Q, bool isInteger, bool signedType>
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struct compute_compNormalize
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{};
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template<length_t L, typename T, typename floatType, qualifier Q>
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struct compute_compNormalize<L, T, floatType, Q, true, true>
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{
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GLM_FUNC_QUALIFIER static vec<L, floatType, Q> call(vec<L, T, Q> const& v)
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{
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floatType const Min = static_cast<floatType>(std::numeric_limits<T>::min());
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floatType const Max = static_cast<floatType>(std::numeric_limits<T>::max());
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return (vec<L, floatType, Q>(v) - Min) / (Max - Min) * static_cast<floatType>(2) - static_cast<floatType>(1);
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}
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};
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template<length_t L, typename T, typename floatType, qualifier Q>
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struct compute_compNormalize<L, T, floatType, Q, true, false>
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{
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GLM_FUNC_QUALIFIER static vec<L, floatType, Q> call(vec<L, T, Q> const& v)
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{
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return vec<L, floatType, Q>(v) / static_cast<floatType>(std::numeric_limits<T>::max());
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}
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};
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template<length_t L, typename T, typename floatType, qualifier Q>
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struct compute_compNormalize<L, T, floatType, Q, false, true>
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{
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GLM_FUNC_QUALIFIER static vec<L, floatType, Q> call(vec<L, T, Q> const& v)
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{
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return v;
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}
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};
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template<length_t L, typename T, typename floatType, qualifier Q, bool isInteger, bool signedType>
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struct compute_compScale
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{};
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template<length_t L, typename T, typename floatType, qualifier Q>
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struct compute_compScale<L, T, floatType, Q, true, true>
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{
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GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, floatType, Q> const& v)
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{
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floatType const Max = static_cast<floatType>(std::numeric_limits<T>::max()) + static_cast<floatType>(0.5);
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vec<L, floatType, Q> const Scaled(v * Max);
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vec<L, T, Q> const Result(Scaled - static_cast<floatType>(0.5));
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return Result;
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}
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};
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template<length_t L, typename T, typename floatType, qualifier Q>
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struct compute_compScale<L, T, floatType, Q, true, false>
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{
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GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, floatType, Q> const& v)
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{
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return vec<L, T, Q>(vec<L, floatType, Q>(v) * static_cast<floatType>(std::numeric_limits<T>::max()));
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}
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};
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template<length_t L, typename T, typename floatType, qualifier Q>
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struct compute_compScale<L, T, floatType, Q, false, true>
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{
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GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, floatType, Q> const& v)
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{
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return v;
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}
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};
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}//namespace detail
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template<typename floatType, length_t L, typename T, qualifier Q>
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GLM_FUNC_QUALIFIER vec<L, floatType, Q> compNormalize(vec<L, T, Q> const& v)
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{
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GLM_STATIC_ASSERT(std::numeric_limits<floatType>::is_iec559, "'compNormalize' accepts only floating-point types for 'floatType' template parameter");
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return detail::compute_compNormalize<L, T, floatType, Q, std::numeric_limits<T>::is_integer, std::numeric_limits<T>::is_signed>::call(v);
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}
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template<typename T, length_t L, typename floatType, qualifier Q>
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GLM_FUNC_QUALIFIER vec<L, T, Q> compScale(vec<L, floatType, Q> const& v)
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{
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GLM_STATIC_ASSERT(std::numeric_limits<floatType>::is_iec559, "'compScale' accepts only floating-point types for 'floatType' template parameter");
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return detail::compute_compScale<L, T, floatType, Q, std::numeric_limits<T>::is_integer, std::numeric_limits<T>::is_signed>::call(v);
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}
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_QUALIFIER T compAdd(vec<L, T, Q> const& v)
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{
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T Result(0);
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for(length_t i = 0, n = v.length(); i < n; ++i)
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Result += v[i];
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return Result;
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}
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_QUALIFIER T compMul(vec<L, T, Q> const& v)
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{
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T Result(1);
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for(length_t i = 0, n = v.length(); i < n; ++i)
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Result *= v[i];
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return Result;
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}
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_QUALIFIER T compMin(vec<L, T, Q> const& v)
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{
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T Result(v[0]);
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for(length_t i = 1, n = v.length(); i < n; ++i)
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Result = min(Result, v[i]);
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return Result;
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}
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_QUALIFIER T compMax(vec<L, T, Q> const& v)
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{
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T Result(v[0]);
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for(length_t i = 1, n = v.length(); i < n; ++i)
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Result = max(Result, v[i]);
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return Result;
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}
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}//namespace glm
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