public override void update (float t)
{
t *= 2;
if (FloatUtils.Small( t , 1)) {
_inner.update(0.5f * Mathf.Pow (t, _rate));
}
else {
_inner.update(1.0f - 0.5f * Mathf.Pow(2-t, _rate));
}
}
protected override CCAction copyImpl ()