Shape Tweening on Cocos2d-x

Hi Cocos2d-x Mans!

I am a common but very crazy Cocos2d-x lover.
I am developing a game using this framework….
But I faced a bit difficult problem for me.

I want just action or class like shape tweening on Flash!
EX : Solid Circle changes to Solid Rectangle or Triangle by *percent(0~1)*…

Please help me.

Thanks.