[Tweener] Timer based Tweener

[Zeh Fernando]

This has actually been an item on the to-do list since the introduction of
the AS3 version - to support arbitrary FPSs for updating. It's not something
that should be done all the time, but it's a nice feature to have for
specific tweens.

The core won't be changed since Tweener is considered a 'finished' project,
but of course everyone can still modify it to add the feature.

Thanks for sharing!

Zeh

On Thu, Dec 3, 2009 at 2:19 PM, Kevin Newman <CaptainN at unfocus.com> wrote:

> I'm doing a project now that has to load old 12 FPS movies and wanted my
> Tweener based widget interaction to be smoother than 12 FPS is capable of.
> So I hacked Tweener to add Timer/updateAfterEvent support.
>
> This is hacky and unfinished, but it does show how this could work. Is
> there any interest in adding something like this to the core, or as a
> special property or something?
>
> Here is the modified code, if you are interested:
>
> /**
>  * Starts the Tweener class engine. It is supposed to be running every time
> a tween exists.
>  */
> private static function startEngine():void {
>    _engineExists = true;
>    _tweenList = new Array();
>
>    __tweener_controller__ = new MovieClip();
>    __tweener_controller__.addEventListener(Event.ENTER_FRAME,
> Tweener.onEnterFrame);
>
>    // Added Timer stuff
>    __timer = new Timer(1000 / 30);
>    __timer.addEventListener(TimerEvent.TIMER, onTimer);
>    __timer.start();
>
>    _currentTimeFrame = 0;
>    updateTime();
> }
>
> /**
>  * Implements a Timer updater to enable updates faster than the document
> framerate.
>  */
> static var __timer:Timer;
> static function onTimer(evt:TimerEvent):void {
>    __tweener_controller__.dispatchEvent(new Event(Event.ENTER_FRAME));
>    evt.updateAfterEvent();
> }
>
> /**
>  * Stops the Tweener class engine.
>  */
> private static function stopEngine():void {
>    _engineExists = false;
>    _tweenList = null;
>    _currentTime = 0;
>    _currentTimeFrame = 0;
>    __tweener_controller__.removeEventListener(Event.ENTER_FRAME,
> Tweener.onEnterFrame);
>    __tweener_controller__ = null;
>
>    // Added Timer stuff
>    __timer.stop();
>    __timer.removeEventListener(TimerEvent.TIMER, onTimer);
>    __timer = null;
> }
>
>
> This is far from polished, but shows how this can work. If you were to run
> this in a project set to 1 FPS, you'd still get 30 FPS updates on Tweener
> based Tweens.
>
> Kevin N.
>
>
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