AS3 Tween a variable inside an array

Question

I have the following code which works perfectly:

    updaterVariable = 0;
    Tweener.addTween(this, {time:2, transition:"linear", updaterVariable:1000, onUpdate:tweenerUpdate});

I will get the value of updaterVariable tweened from 0 to 1000 in 2 seconds. My question is whether there is a similar way to tween a variable in an array, for example:

    updaterVariable[10] = 0;
    Tweener.addTween(this, {time:2, transition:"linear", updaterVariable[10]:1000, onUpdate:tweenerUpdate});

I tried the above code, and its not working. Can anyone help?

www0z0k · Accepted Answer · 2016-08-23 07:03:46Z

1

You can pass your array to the tweener and use index as a field to be changed:

updaterVariable[10] = 0;
Tweener.addTween(updaterVariable, {time:2, transition:"linear", '10':1000, onUpdate:tweenerUpdate});

Not sure which tweener you are using, however it works with TweenMax:

private var arr:Array;
public function Main() {
    arr = [];
    arr.push(0);
    arr.push(0);
    arr.push(t);
    TweenMax.to(arr, 1000, { '2' : 1000 } );
    addEventListener(Event.ENTER_FRAME, onframe);
}
private function onframe(e:Event):void {
    trace(arr[2]);//outputs expected numbers
}

answered Aug 23, 2016 at 7:03

www0z0k

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4 Comments

Abhilash K Over a year ago

Thank you for the answer. But it wont work if I place a variable like "i" in place of "10" right? Is there any way to work it out?

Abhilash K Over a year ago

Because I may need to change the values around and cant always pass the index as string.

www0z0k Over a year ago

@AbhilashK, it depends on the task. You may use a getter function like public function get i():int { return arr[10]; } for example. The question is - why do you need to use an array for tweening if you know you need to tween a variable at a certain index?

www0z0k Over a year ago

@AbhilashK because primitive types are passed by value and a = 2; arr.push(a); a++; trace(a, arr[0]); will output 3, 2, not 3, 3 as it would happen if arr[0] stored a reference to a

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