vector_angle.inl

 
 
namespace glm
{
    template<typename genType>
    GLM_FUNC_QUALIFIER genType angle
    (
        genType const& x,
        genType const& y
    )
    {
        GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'angle' only accept floating-point inputs");
        return acos(clamp(dot(x, y), genType(-1), genType(1)));
    }
 
    template<length_t L, typename T, qualifier Q>
    GLM_FUNC_QUALIFIER T angle(vec<L, T, Q> const& x, vec<L, T, Q> const& y)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'angle' only accept floating-point inputs");
        return acos(clamp(dot(x, y), T(-1), T(1)));
    }
 
    template<typename T, qualifier Q>
    GLM_FUNC_QUALIFIER T orientedAngle(vec<2, T, Q> const& x, vec<2, T, Q> const& y)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'orientedAngle' only accept floating-point inputs");
        T const Angle(acos(clamp(dot(x, y), T(-1), T(1))));
 
        if(all(epsilonEqual(y, glm::rotate(x, Angle), T(0.0001))))
            return Angle;
        else
            return -Angle;
    }
 
    template<typename T, qualifier Q>
    GLM_FUNC_QUALIFIER T orientedAngle(vec<3, T, Q> const& x, vec<3, T, Q> const& y, vec<3, T, Q> const& ref)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'orientedAngle' only accept floating-point inputs");
 
        T const Angle(acos(clamp(dot(x, y), T(-1), T(1))));
        return mix(Angle, -Angle, dot(ref, cross(x, y)) < T(0));
    }
}//namespace glm