component_wise.inl

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