# Hummm.... tweening with actionscipt
**URL:** https://forum.kirupa.com/t/hummm-tweening-with-actionscipt/4926
**Category:** Uncategorized
**Created:** [August 25, 2002, 7:18am UTC](https://forum.kirupa.com/t/hummm-tweening-with-actionscipt/4926 "2002-08-25T07:18:04Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Afro\_Ninja](https://forum.kirupa.com/u/Afro_Ninja)
#### Post date: [August 25, 2002, 7:18am UTC](https://forum.kirupa.com/t/hummm-tweening-with-actionscipt/4926/1 "2002-08-25T07:18:04Z")
Hey I’ve known about this for a while, but just today I was told it can reduce file size… this caught my eye as my current big project is getting to be a big fla… So how much can the file be reduced? And also, where do I learn this technique? I know some basic action script, if someone would point me in the way of a tutorial I’d be much appreciative.
---
### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [August 25, 2002, 9:12am UTC](https://forum.kirupa.com/t/hummm-tweening-with-actionscipt/4926/2 "2002-08-25T09:12:08Z")
I wouldnt call it tweening,i’d call it .[asp movement](http://www.kirupaforum.com/showthread.php?s=&threadid=1157)
onClipEvent (enterFrame) {
\_x+=10;
}
onClipEvent (enterFrame) {
\_y+=10;
}
onClipEvent (enterFrame) {
\_width+=10;
}
onClipEvent (enterFrame) {
\_height+=10;
}
onClipEvent (enterFrame) {
\_alpha-=10;
}
onClipEvent (enterFrame) {
\_rotation+=10;
}
onClipEvent (enterFrame) {
\_xscale+=10;
}
onClipEvent (enterFrame) {
\_yscale+=10;
}
put each of these actions in seperate MC’s and watch the fun.[asp movement](http://www.kirupaforum.com/showthread.php?s=&threadid=1157)
---
### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [August 25, 2002, 5:43pm UTC](https://forum.kirupa.com/t/hummm-tweening-with-actionscipt/4926/3 "2002-08-25T17:43:16Z")
Ah yes, I see how that works… then to stop it I could create a loop that ends after however many frames I need… the only problem is that you don’t know where it ends up at… that leads to a lot of trial and error and testing.
At least I think so…
hmmm how much will that really reduce filesize?
---
### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [August 26, 2002, 2:21am UTC](https://forum.kirupa.com/t/hummm-tweening-with-actionscipt/4926/4 "2002-08-26T02:21:23Z")
no trial an error… or at least not much
something like this could help.
onClipEvent(enterFrame){
If(\_x\<200){
\_x++;
}
}
Mind you this is not optimal. There are better ways of doing this… but not many so simple.
Mostly a/s is used to move things in regular patterns, rather than from point a to b.
It will reduce your file size a lot.
---
### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [August 26, 2002, 3:35am UTC](https://forum.kirupa.com/t/hummm-tweening-with-actionscipt/4926/5 "2002-08-26T03:35:28Z")
d’oh… sounds like I need to incorporate some…
But I shouldn’t be too worried… My file cannot be over 5MB… it’s currently 1MB published with all sound and I’m about half done.
Man I wish I had optimaze!
---
### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [August 27, 2002, 10:11am UTC](https://forum.kirupa.com/t/hummm-tweening-with-actionscipt/4926/6 "2002-08-27T10:11:13Z")
You can create a tweenTo function or prototype to do the job for you. Something I did based on Supra’s code:
```auto
MovieClip.prototype.tweenTo=function(x,y,speed){
var deltax=x-this._x;
var deltay=y-this._y;
var distance=Math.sqrt(deltax*deltax+deltay*deltay);
var norm=speed/distance;
var diffx=deltax*norm;
var diffy=deltay*norm;
if (distance>speed){
this._x+=diffx;
this._y+=diffy;
} else {
this._x=x;
this._y=y;
}
}
```
You can use that with any movie clip:
```auto
onClipEvent(enterFrame){
this.tweenTo(300,400);
}
```
pom :asian: