atan_poly_unit_()

template<typename F>

F fl::detail::atan_poly_unit_ ( F u )

inline

Definition at line 536 of file math.cpp.hpp.

                                           {
    // Polynomial approximation of atan on [-1, 1].
    // Coefficients from Padé-style minimax fit; max abs error ~1.5e-3.
    const F u2 = u * u;
    return u * (F(0.99997726) +
                u2 * (F(-0.33262347) +
                      u2 * (F(0.19354346) +
                            u2 * (F(-0.11643287) +
                                  u2 * (F(0.05265332) +
                                        u2 * F(-0.01172120))))));
}

References fl::FL_NO_EXCEPT.

Referenced by atan_full_().

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