tweenfunc::easeOut is incorrect

[stephenhurry]

Please study this: http://www.cnblogs.com/cocos2d-x/archive/2012/03/15/2398516.html

As a mirror of easeIn, s(t) = t^r, easeOut should not be s(t) = t^1/r.
Instead it should be s(t) = 1 - (1 - t)^r. This resultant behaviour is more realistic to the desired one.

That say, the function tweenfunc::easeOut should be corrected as:

float easeOut(float time, float rate)
{
    return (1 - powf(1 - time, rate));
}

[stephenhurry]

anyone?