Elastic scale issues

[Danger Madcow]

I have some elastic scale code that I'm using, and it works for the most part. The actions in the first frame are the common:

Movieclip.prototype.elasticScale = function(target, accel, convert) {
	xScale = xScale * accel + (target - this._xscale) * convert 
	yScale = yScale * accel + (target - this._yscale) * convert 
	this._xscale += xScale
	this._yscale += yScale
}

stop();

And there's a movieclip with this code on it:

onClipEvent (enterFrame) {
	if (this.hitTest(_root._xmouse, _root._ymouse, true)) {
		elasticScale(120, 0.7, 0.3);
	} else {
		elasticScale(100, 0.7, 0.3);
	}
}

And it scales/bounces perfectly. Problem is, once I add another movieclip with the same clipEvent actions, this second movieclip enlarges as is should *but also* makes the first movieclip jiggle. Any way to prevent this from happening?

[Lexicon]

You need to make xScale and yScale local to each movieClip....

code:

---

MovieClip.prototype.elasticScale = function(target, accel, convert) {

	this.xScale = this.xScale * accel + (target - this._xscale) * convert;

	this.yScale = this.yScale * accel + (target - this._yscale) * convert;

	this._xscale += this.xScale;

	this._yscale += this.yScale;

}

stop();

---

[Danger Madcow]

And I shall name my first born "Lexicon"! Thanks for the help - it makes perfect sense and worked like a charm.

On a related note, do you (or anyone else) know of a way to set this up so that it's not dependent on having an "onClipEvent(enterFrame)" running continuously? I may have 10+ of these elastic movieclips on stage at once, and I'd rather not take the performance hit that I'm guessing they'll create.

[Lexicon]

There shouldn't be much of a performance hit.

Have a look at "Springy Circles" 1 and 2, they have 200 of the same elastic function working at once....

http://www.lexicon-design.co.uk/port...flash&dnum=ALL

If it runs ok, then don't worry about it.

[therejoer]

Hi guys,
I'm trying to adapt a bit of this code, but I'm running into a problem i can't figure out.

I've got a 'blank' movieclip with this code embedded, and I drop this movieclip into others that I want this effect to be applied to.

function elasticScale(target, accel, convert) {
_parent.graphic.xScale = (_parent.graphic.xScale * accel + (target - _parent.graphic._xscale) * convert);
_parent.graphic.yScale = _parent.graphic.yScale * accel + (target - _parent.graphic._yscale) * convert;
_parent.graphic._xscale += _parent.graphic.xScale;
_parent.graphic._yscale += _parent.graphic.yScale;
stop();
}

_parent.onRollOver = function(){
yayuh =1;
}

_parent.onRollOut = function(){
yayuh = 0;
}


_root.onEnterFrame = function() {
if (yayuh ==1){
if (_parent.graphic.hitTest(_root._xmouse, _root._ymouse, true)) {
elasticScale(150, 0.7, 0.3);
} else {
elasticScale(100, 0.7, 0.3);
}
}
}


When tracing for _parent.graphic.xScale, im getting NaN. Do I need to initialize these variables? Do you know what I'm doing wrong? Thanks.

[therejoer]

never mind, figured it out. All it took was to initialize _parent.graphic.xScale with 1