I have a movieclip animating across the stage using a tween in the
timeline. Halfway through that tween I'm using AS to set the _alpha of the
clip to 50%. At the moment I do this, if forgets about the tween in the
timeline and stops moving. Why is this happenning? How do I tell Flash
that I want the timeline animation to keep working after I change a
MovieClip property?
Timeline animations are something done on "design-time" - when exporting the
final SWF, flash actually renders all the motion frames to precalculated
pseudo-keyframes and then applies them when playing the movie.
You can't make it 'switch' back to the timeline tween. As soon as you change
a property dynamically, it snaps out of any tweening and flash won't update
it anymore. You can do this:
1. Instead of changing the property on the movie that's being tweened on the
timeline, change it INSIDE it (for example, having a container movieclip
inside the movieclip itself, which you can change the property); or
2. Drop timeline tweening and use 100% actionscript tweening instead.
Chosing option 1 can be messy and it's a bit different to figure out (it
will stack with yout timeline tweening, not overwrite or change it) but it
works on some cases. And chosing option 2 is probably the best thing you'll
ever do for your flash development productivity.
- Zeh
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