[Tweener] Tween around circular path
Zeh Fernando
zeh at zehfernando.com
Mon Nov 2 11:24:14 PST 2009
Oops, the setter should be
public function set objectAngle(__value:Number): void {
instead of just "angle".
Also, you'd use it like...
Tweener.addTween(whatever, {objectAngle: 50, time:1});
Etc.
Zeh
On Mon, Nov 2, 2009 at 2:22 PM, Zeh Fernando <zeh at zehfernando.com> wrote:
> That's a way, but personally I believe it's way too wacky.
>
> Personally, independently of the tweening engine used, I'd create a
> function that allowed you to project an object on the ellipse then create a
> getter/setter and just tween it. Something like
>
>
> protected var _objectAngle:Number
>
> public function get objectAngle(): Number {
> return _objectAngle;
> }
>
> public function set angle(__value:Number): void {
> if (_objectAngle!= __value) {
> _objectAngle= __value;
>
> // Redraw object
> var radiusX:Number = 10;
> var radiusY:Number = 20;
> var px:Number = Math.cos((_objectAngle / 180) * Math.PI) * radiusX;
> var py:Number = Math.sin((_objectAngle / 180) * Math.PI) * radiusY;
> myObject.x = px;
> myObject.y = py;
> }
> }
>
>
> Something like that. You may need additional transformation if you want to
> rotate the ellipsis itself instead of using simple x/y radius.
>
> Zeh
>
> On Mon, Nov 2, 2009 at 2:09 PM, Fred Naude <info at headspacemedia.co.za>wrote:
>
>> HI there list,
>>
>>
>>
>> How would I go about tweening an object around an ellipse with tweener?
>>
>> Is using Bezier points the only way?
>>
>>
>>
>> Thanks,
>>
>>
>>
>> Fred
>>
>> _______________________________________________
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>>
>>
>
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