[Tweener] Tweens group current state

[Zeh Fernando]

> I just figured out my mistake :-) gave me a 40 min's break+sweating, 
> already made this few times,
> and still i run in the same trap again.
> However, thank you for the answer, another question, what is the 
> advantages/disadventages of using frame's?

You mean useFrames?

The basic premise is: never use it, don't even worry or think about it, 
unless you're REALLY sure of what you want to do.

I say this as a warning because many times people have this 
misconception of using frames against time or whatever, hoping it'll be 
magically better, but it's a mistake.

In a nutshell, useFrames tie the animation to the actual rendering 
performance, so you should use it when instead of taking 1 sec to 
animate something, you want it to take exact 30 frames (regardless of 
the actual time). The problem with this approach is that animation won't 
be necessarily fluid, and tweening playtime will vary from computer to 
computer - dropping frames but rendering them mathematically correct 
(what the default time use does) is way better, for animation smoothness.

However, one real example where you need useFrames is when you want to 
create an animation and generate all the frames as separate Bitmap 
files. Since you want ALL frames rendered, instead of a smooth realtime 
animation played once, you use useFrames. Then independently of the time 
it takes on each different computer, all frames will be rendered with 
equal "spacing" between the frames (then you could later "play" the 
frames and stuff like that).

Zeh