Method gain

src/internal/src/Distance.cpp:20–41

}

double DistanceEffect::gain(double distance)
{
    // don't go beyond maximum distance
    distance = min(distance, m_maxDistance);

    // if clamped, don't get closer than reference distance
    if (m_isClamped)
        distance = max(distance, m_refDistance);

    switch (m_model)
    {
        default:
        case ModelLinear:
            return linearGain(distance);
        case ModelInverse:
            return inverseGain(distance);
        case ModelExponential:
            return exponentialGain(distance);
    }
    ASSERT_NOT_REACHED();
    return 0.0;
}

double DistanceEffect::linearGain(double distance)
{