atan2()

template<typename Derived, int IntBits, int FracBits>

static FASTLED_FORCE_INLINE Derived fl::fixed_point_base< Derived, IntBits, FracBits >::atan2 ( Derived y, Derived x )

inlinestatic

Definition at line 180 of file base.h.

                                                                    {
        constexpr Derived pi(3.1415926f);
        constexpr Derived pi_over_2(1.5707963f);
        if (x.mValue == 0 && y.mValue == 0) return Derived();
        if (x.mValue == 0) return y.mValue > 0 ? pi_over_2 : -pi_over_2;
        if (y.mValue == 0) return x.mValue > 0 ? Derived() : pi;
        Derived ax = abs(x);
        Derived ay = abs(y);
        Derived a;
        if (ax >= ay) {
            a = atan_unit(ay / ax);
        } else {
            a = pi_over_2 - atan_unit(ax / ay);
        }
        if (x.mValue < 0) a = pi - a;
        if (y.mValue < 0) a = -a;
        return a;
    }

References abs(), atan_unit(), FASTLED_FORCE_INLINE, fl::x, and fl::y.

Referenced by acos(), and asin().

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