atan2_full_()

template<typename F>

F fl::detail::atan2_full_ ( F y, F x )

inline

Definition at line 561 of file math.cpp.hpp.

                                            {
    const F kPi     = F(3.14159265358979323846);
    const F kPiHalf = F(1.57079632679489661923);
    // x == 0 special case: angle is ±π/2 (sign of y), or 0 when both are 0.
    if (x == F(0)) {
        if (y > F(0)) return kPiHalf;
        if (y < F(0)) return -kPiHalf;
        return F(0);
    }
    F a = atan_full_(y / x);
    if (x < F(0)) {
        a += (y >= F(0)) ? kPi : -kPi;
    }
    return a;
}

References atan_full_(), fl::FL_NO_EXCEPT, fl::x, and fl::y.

Referenced by fl::atan2_impl_double(), and fl::atan2_impl_float().

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