Method abs

src/fl/math/fixed_point.h:330–332

    // Absolute value: abs(-2.5) → 2.5
    static constexpr FASTLED_FORCE_INLINE fixed_point abs(fixed_point x) FL_NOEXCEPT {
        return from_raw(Base::abs(x).raw());
    }

    // Sign function: returns -1, 0, or +1.
    //   sign(-3.5) → -1.0, sign(0) → 0.0, sign(2.0) → 1.0