129 lines
4.7 KiB
C++
129 lines
4.7 KiB
C++
/// @ref gtx_component_wise
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/// @file glm/gtx/component_wise.inl
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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 <typename T, typename floatType, precision P, template <typename, precision> class vecType, bool isInteger, bool signedType>
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struct compute_compNormalize
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{};
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template <typename T, typename floatType, precision P, template <typename, precision> class vecType>
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struct compute_compNormalize<T, floatType, P, vecType, true, true>
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{
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GLM_FUNC_QUALIFIER static vecType<floatType, P> call(vecType<T, P> 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 (vecType<floatType, P>(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 <typename T, typename floatType, precision P, template <typename, precision> class vecType>
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struct compute_compNormalize<T, floatType, P, vecType, true, false>
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{
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GLM_FUNC_QUALIFIER static vecType<floatType, P> call(vecType<T, P> const & v)
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{
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return vecType<floatType, P>(v) / static_cast<floatType>(std::numeric_limits<T>::max());
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}
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};
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template <typename T, typename floatType, precision P, template <typename, precision> class vecType>
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struct compute_compNormalize<T, floatType, P, vecType, false, true>
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{
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GLM_FUNC_QUALIFIER static vecType<floatType, P> call(vecType<T, P> 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 <typename T, typename floatType, precision P, template <typename, precision> class vecType, bool isInteger, bool signedType>
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struct compute_compScale
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{};
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template <typename T, typename floatType, precision P, template <typename, precision> class vecType>
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struct compute_compScale<T, floatType, P, vecType, true, true>
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{
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GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<floatType, P> 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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vecType<floatType, P> const Scaled(v * Max);
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vecType<T, P> 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 <typename T, typename floatType, precision P, template <typename, precision> class vecType>
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struct compute_compScale<T, floatType, P, vecType, true, false>
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{
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GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<floatType, P> const & v)
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{
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return vecType<T, P>(vecType<floatType, P>(v) * static_cast<floatType>(std::numeric_limits<T>::max()));
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}
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};
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template <typename T, typename floatType, precision P, template <typename, precision> class vecType>
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struct compute_compScale<T, floatType, P, vecType, false, true>
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{
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GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<floatType, P> 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, typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_QUALIFIER vecType<floatType, P> compNormalize(vecType<T, P> 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<T, floatType, P, vecType, 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, typename floatType, precision P, template <typename, precision> class vecType>
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GLM_FUNC_QUALIFIER vecType<T, P> compScale(vecType<floatType, P> 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<T, floatType, P, vecType, 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, precision P, template <typename, precision> class vecType>
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GLM_FUNC_QUALIFIER T compAdd(vecType<T, P> 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 <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_QUALIFIER T compMul(vecType<T, P> 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 <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_QUALIFIER T compMin(vecType<T, P> 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 <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_QUALIFIER T compMax(vecType<T, P> 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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