atan() [2/2]

static FASTLED_FORCE_INLINE s16x16 fl::s16x16::atan ( s16x16 x )

inlinestatic

Definition at line 181 of file s16x16.h.

                                                                  {
        constexpr s16x16 one(1.0f);
        constexpr s16x16 pi_over_2(1.5707963f);
        bool neg = x.mValue < 0;
        s16x16 ax = abs(x);
        s16x16 result;
        if (ax <= one) {
            result = atan_unit(ax);
        } else {
            result = pi_over_2 - atan_unit(one / ax);
        }
        return neg ? -result : result;
    }

References s16x16(), abs(), atan_unit(), FASTLED_FORCE_INLINE, FL_NOEXCEPT, and fl::x.

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