exp()

template<typename T>

T fl::exp ( T value )

inline

Definition at line 47 of file math.h.

                                            {
#if defined(FASTLED_HAS_EXP)
    return static_cast<T>(::exp(static_cast<double>(value)));
#else
    // Fallback implementation using Taylor series approximation
    // e^x ≈ 1 + x + x²/2! + x³/3! + x⁴/4! + x⁵/5! + ...
    // This is a simple approximation for small values
    double x = static_cast<double>(value);
    if (x > 10.0)
        return static_cast<T>(22026.465794806718); // e^10 approx
    if (x < -10.0)
        return static_cast<T>(0.0000453999297625); // e^-10 approx
 
    double result = 1.0;
    double term = 1.0;
    for (int i = 1; i < 10; ++i) {
        term *= x / i;
        result += term;
    }
    return static_cast<T>(result);
#endif
}

References exp(), and x.

Referenced by exp(), and MaxFadeTracker::operator()().

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