[Tweener] number of actively running tweens to optimize rendering effort

[Zeh Fernando]

> 1) I'd like to find out how many tweens are actively running,
> so that I can determine whether my animated scene needs to be rendered 
> or not.
> 
> the isTweening(), getTweens() etc. methods all require p_scope:Object.
> but I wanna know about all active tweens.

The best way is doing a new method/function that reads Tweener's 
internal tween list and do what you want.

> 2) I'd like to stop tweening on one part of the scene, while keeping the 
> tweens on another part of the scene still running.
> is there any way to group tweens and pause / resume those groups 
> independently rather than all or nothing?

It's object-dependent, so the only way is knowing in advance which 
objects you want to pause/resume/stop.

Zeh