alpha problem

[xaero182]

hey,

can someone plz help me with this code:

onClipEvent (load) {
this._alpha=0;
}
onClipEvent (enterFrame) {
this._alpha+=(100-this._alpha)/5;
trace(this._alpha);
}


the object's alpha never reaches a value of 100


thx

Xaero

[bregtemundo]

hey,

I dont really have an explaination for this but this seems to work
(wierd problem though, would love to know what causes this)

onClipEvent (load) {
	this._alpha=0;
	alpha =0;
}
onClipEvent (enterFrame) {
	alpha+=((100-this._alpha)/5);
	this._alpha = alpha
	trace(this._alpha);
}

[gparis]

that's because _alpha is a property. If you'd have tried it with _x or _rotation you would have had the same approx. numbers.
To get an exact value, use variables. For example:
onClipEvent (load) {
this._alpha = al = 0;
}
onClipEvent (enterFrame) {
al += (100-this._alpha)/5;
this._alpha=al;
}

gparis

[xaero182]

thx guys!!!

is this the same reason the _rotation property goes crazy above 180°?

thx!!!

Xaero

[gparis]

as i said, don't use properties directly in you equations. use variables.
gparis

[ericlin]

Also, be careful.

That codes is "deceleration - move toward 100". From MATH view, theoretically, it will progressively be near 100 but never equal 100;

[xaero182]

ok,
thanks to you all!!!

greets

Xaero

[senocular]

_alpha is actually based on a range of 0-255. Because of this any attempt to adjust it by 100/256 = 0.390625 or less, nothing will happen. previous posts offer appropriate solutions