effect Checkbox Control Checkbox firstKeyTime thisProperty key time вр

m = effect("Checkbox Control")("Checkbox");

    firstKeyTime = thisProperty.key(1).time; //время первого ключа

    n = 0;
    if (m.numKeys > 0) {
        n = m.nearestKey(time).index;
        if (m.key(n).time > time) n--;
    }

    if (n > 0) {
        inMarker = m.key(n).time;

        thisProperty.valueAtTime(firstKeyTime + (time - inMarker));
    } else thisProperty.valueAtTime(firstKeyTime);