Is it flash bug? Tween Class

I've been working on a bit big project. I've some components on the stage. There are basically 4 frames. Each frame has some components. What I've done is, I've used tween class. Workflow is something like this:
Frame 1:
--used Tween class to get fade effect for List component.
--used Tween.MOTION_FINISH event to fire an event when it is finished.
--when it is finished, applied eventListener
--on Change event, remove eventListeners and use Tween class again to get reverse fade effect.
--again used Tween.MOTION_FINISH event to fire an event when finished.
--in that evenHandler, gotoAndStop(2);
Frame 2:
//similar
Frame 3:
//similar
and so on.. now, what happens, is, if i play with my scene, sometimes tween class failed to work. sometimes it does not display List component, sometimes it displays List component with alpha 0.2. sometimes it happens with movieClip also. Is it flash bug or problem with my code?

probably a coding problem. the most common error that seems like a flash bug would be to define a tween within a function body allowing flash to gc that tween, possibly before it starts and/or completes.

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Is there a bug in the as3 tween class

Is there a bug in the as3 tween class that causes tweens to stop before completing. I read that there is and that a 3rd party tween class should be used. I'm just starting out learning as3 and experimenting but this would be good to know when I move onto more complex projects.
Also the solution for this was to make your function global. Does this simply mean place your function in the top level of your movie.
I have done research on this topic but I found many conflicting answers.
Any assistance is welcome thanks in advance.

the tween declaration (if you need one) must be placed within the scope of the function. so, if the below function f() is defined in a movieclip, you can use any of the 3 (but don't use the last):
///////// most common use ////////////////////////////////////////
var t:Tween;
function f(){
t=new Tween(...)
/////// next most common use /////////////////////////////////////////
//no declaration needed because the tween is not referenced anywhere outside the function so need not be assigned a variable
function f(){
new Tween(...)
/////////// least common, not good coding, but possible ////////////
// var t:Tween; // declared on the root timeline, for example
function f(){
MovieClip(root).t=new Tween(...)
p.s. please mark correct/helpful answers

Tween Class - calling Function

What am I doing wrong? I have been using the Tween Class in AS2 for years. This is how I have been using it.
//Beginning of my Flash file
import mx.transitions.Tween;
import mx.transitions.easing.*;
function fadeon(mcname:String) {
    new Tween(mcname, "_alpha", Strong.easeOut, 0, 100, 1.5, true);
//This is placed on Frames where I want to call this particular Tween
fadeon(mymovieclipsname);
Similiar setup for AS3 with no errors when I run it. The only problem is it doens't work.
import fl.transitions.Tween;
import fl.transitions.easing.*;
function fadeon(mcname:String):void {
    new Tween(mcname, "alpha", Strong.easeOut, 0, 100, 1.5, true);
//on Frames where I want to call this particular Tween
mymovieclipsname.fadeon();
if I run this portion the same as AS2 I get this lovely Compiler Error message.
1067: Implicit coercion of a value of type flash.display:MovieClip to an unrelated type String.
Any thoughts or help wold be greatly appreciated.

Note that a better solution for AS3 is to simply create a Class that does the tween (to itself), then apply that to each bullet and leave the parent out of it. I'd probably have done the same thing in AS2 as well, but I learned As1>As3>As2, so my experience is not representative.
Here's the Class that I use to do this (note I didn't use a Tween for this task as they have the danger to go out of memory before the tween is done unless you store a reference to them):
package view.effects {
import flash.display.Sprite;
import flash.events.Event;
//view.effects.SimpleFadeIn
public class SimpleFadeIn extends Sprite {
public function SimpleFadeIn() {
   super();
   addEventListener(Event.ADDED_TO_STAGE, startFade);
protected function startFade(e:Event):void {
   alpha = 0;
   addEventListener(Event.ENTER_FRAME, doFade);
   addEventListener(Event.REMOVED_FROM_STAGE, cleanUp);
protected function doFade(e:Event):void {
   if (alpha < 1) {
    alpha += .04;
   } else {
    cleanUp(e);
protected function cleanUp(e:Event):void {
   removeEventListener(Event.ENTER_FRAME, doFade);
   removeEventListener(Event.REMOVED_FROM_STAGE, cleanUp);
Note that the reason the path to the Class is there in a comment is so team members can copy and paste it into the Base Class for a MC they want to apply this behavior to.

Tween class - tweening from curent position

Hi, I've been looking at the tween classes and I was
wondering how I could use it to tween an object that i already
placed on the stage? So using it's current position and tweening to
a new position. Is there a way of doing it by simply using a term
that flash understands (eg _xPosition)?
Cheers
Ray
import mx.transitions.Tween;
import mx.transitions.easing.*;
new Tween(ball_mc, "_x", Elastic.easeOut, 300, 50, 3, true);
new Tween(ball_mc, "_y", Elastic.easeOut, 100, 50, 3,
true);

I think I asked for help a little quick there.
this._x
it looks like that is what I was after.
Ray

Tween class animations - modifying elasticity

I am fairly new to Flash, and couldn't find the help I needed through a search.
I am using the Tween class to move objects when buttons are clicked. I am using elastic easing as the animation ends, and it looks ok. But am I able to modify the elasticity at all? I like the effect, but it is a little strong and I would like to reduce the bounce at the end.
Can I do this, or by using this method of animation am I losing the fine control that I would have by using the timeline and I just have to suck it up?

Well the easing you provide for the tween is just a reference to a function. So you can search the web and find your own functions. Robert Penner is famous for a large number of really great easing methods. Or you can just muck a bit with the built in functions. I put two small clips on the stage, clip0 and clip1. Then this code:
import fl.transitions.*;
import fl.transitions.easing.*;
var myTween0:Tween=new Tween(clip0,"x",Elastic.easeOut,100,500,2,true);
myTween0.start();
var myTween1:Tween=new Tween(clip1,"x",myEase,100,500,2,true);
myTween1.start();
function myEase(t:Number, b:Number, c:Number, d:Number):Number {
return Elastic.easeOut(t, b, c, d, .5, .9);
The the top one is the default and the lower one is my "modified" version. If you check out the help files for the Elastic classes easeOut method it requires the first four arguments (time, start value, end value of the prop, and duration) as do all tween functions. But the last two a and p are specific to elastic easing. The first is the amplitude of the sine wave and p is the period of the sine wave. I don't know what the units are on either of those, but I'm guessing pixels (or twips) and either seconds or milliseconds. So you could just fiddle with those numbers.
I'm not sure if there is anyway to send those numbers directly through the Tween constructor -- regardless of whether I used the built in functions or made my own.

Tween Class Tuturial (k)

I am brand new to the Tween class. Would like to use it to
animate some
text.
Don't know where to start. Is there a good tuturial
somewhere? The one
on Adobe is complicated.
Need a no-brainer version.
-Kirk

Tween class is in some ways just really verbose, so it always
take a little bit to get into. The documentation shipped with Flash
is a good reference to see how it works. This is the best tutorial
I've seen:
http://www.actionscript.org/tutorials/advanced/Tween-Easing_Classes_Documented/

Tween Class not working in Projector

Hi all...
I have a very strange problem. I have a slideshow that uses
the Tween class to fade between jpg images. In the swf file and in
the standalone flash player, everything works just great. However,
when I make a projector file from the fla, either from within
Flash, or from the standalone player, the transitions stop working.
This behavior is identical on both a PC and a Mac.
Does anyone have a clue why projector would behave
differently?
Thanks.
Lance Ong

In your custom UIComponent class, your never added your myAction instance. Try this for the MyUIComp constructor:
public function MyUIComp() {
myAction = new MyAction();
this.addChild(myAction);
If this post answers your question or helps, please mark it as such.
Greg Lafrance - Flex 2 and 3 ACE certified
www.ChikaraDev.com
Flex / AIR Development, Training, and Support Services

Problems scaling width of movieclip with Tween class

In my app I'm scaling the width of a movieclip using the
Tween class.
My problem is that the new scaled width is not right.
Is this a bug in the as3 code? Does anyone have a solution?
trace(graphPanel.width) // 500
scaleValue = 5;
new Tween(graphPanel, "scaleX", None.easeNone, 1, scaleValue,
2,
true);
trace(graphPanel.width) // 2494.25

Sounds like you need to scale the star object inside of the star_mc. So you just need to make the star into a sprite/movie clip (how ever you want ot do it) then target that with the scaleX & scaleY, something like,
star_mc.star.scaleX = star_mc.star.scaleY = 1.5;

Import tween class

Hi. I am new at using actionscript, and I am having a bit of
difficulty with Flash MX and importing tween class.
I have typed in this code:
import mx.transitions.Tween;
import mx.transitions.easing.*;
and this is the response I get:
Scene=Scene 1, Layer=actions, Frame=1: Line 1: ';' expected
import mx.transitions.Tween;
Scene=Scene 1, Layer=actions, Frame=1: Line 2: ';' expected
import mx.transitions.easing.*;
Every resource I go to tells me that my code is correct. Does
anyone know what I am doing wrong?

What version of Flash?
Dave -
Head Developer
http://www.blurredistinction.com
Adobe Community Expert
http://www.adobe.com/communities/experts/

New Flash8 Tweening Class?

Hello Community,
I have been using a pretty cool technique for controlling
motion / alpha / scale of various instances on my stage with this
technique where you read in the MX Tweening Class and then set up
these variables that changes the motion / alpha / scale over time.
And, if I place these variables into a function and call that
function on an event (pushing a button, for example) the animation
over time event happens. I cannot get this technique to work with
(what appears new) the FP8 Tweening Matrix thingy.
Below (first part) is some sample code of the old way, in MX,
I did this:
I cannot get something similar to this to work in Flash Pro 8
(FP8) with these funky matrix thingies that this class is now built
within.
For example, I need to have these import (class) lines at the
beginning, but then how do I create the same sort of animation in
the function?
import flash.geom.Transform;
import flash.geom.Matrix;
I guess, basically, what I am trying to ask here is: How do
you create animation via the (what was formerly known as) the Tween
Class in FP8?
Any help/info would be appreciated.
Thanks for your time,
-john

I agree with LuigiL ...you didnt set the variable fInt, so
those wont work. I use the Tween class in Flash8 daily just
fine.

Tween Class fails

Hi,
i was looking for some help with tween class beacuse i have a strange problem. I'm working with AS3, when i test my project, sometimes the Tween fails, sometimes it works. It's really strange, i don't know why. The animation stops before the end point. The most strange for me is why sometimes it works and sometimes no?
My code is geting a little complex, then i tried to do the same process in a simple model, and the result was the same, i run the model many times, in 5 or 3 % the animation finished before the correct end point. Does anybody with the same problem?
Thanks in advanced!
Henrique.

Thanks clbeech!
In fact, i was using one code line (var nameTween:Tween = new Tween(...)) and calling this line many times by a Timer event. But, how can i use diferent names for the tween var? May i use a counter like var nameTween[counter]:Tween = new Tween(...)?
My code is a little big and confuse, i'll try to solve the problem without publish the code. If i don't find a solution, i'll organize it and them put it here.
Thanks a lot!
H.

Making a complex button with the Tween class...not sure why this isn't working.

Hi all,
I'm trying to make a button which scales up on rollover and
scales down on rollout and I wanted to use the Tween class to do it
because I'm going to be making a bunch of these buttons and I want
the code to be as efficient as possible.
So right now I have a circle in a movie clip, and here's what
I have on the first frame of that circle's actions layer:
import mx.transitions.Tween;
import mx.transitions.easing.*;
function grow(who) {
var tw:Tween = new Tween(who, "_xscale", Strong.easeOut,
100, 400, 1, true);
var tw2:Tween = new Tween(who, "_yscale", Strong.easeOut,
100, 400, 1, true);
function shrink(who) {
var tw3:Tween = new Tween(who, "_xscale", Strong.easeOut,
400, 100, 1, true);
var tw4:Tween = new Tween(who, "_yscale", Strong.easeOut,
400, 100, 1, true);
this.onEnterFrame = function() {
trace(rewind);
if (rewind == true) {
shrink(this);
this.onRollOver = function() {
rewind = false;
grow(this);
this.onRollOut = function() {
rewind = true;
The circle scales up just fine but when I rollout it doesn't
scale back down. I did a trace to see if my tween was being called
and sure enough it was. So I did another trace to see if the
_xscale or _yscale was changing and they both were going down to
around 290 on rollOut although there's no noticeable difference in
the size of the button, it just looks like it's sitting there.
I was also wondering if importing the whole class library
will add very much to my file size?
Also, since I'm going to have a lot of these buttons on the
stage at the same time (these buttons will be like markers all over
a map so there'll probably be around 50+) would it be a bad idea to
have that many onEnterFrame checks running simultaneously? Is that
going to slow the user's CPU way down?

Thanks for the suggestions guys.
I tried your code and got the rollOut to work but the button
blinks rapidly if the user rolls out and then rolls back in
quickly. Here is a link to the swf:
http://www.stationarynotes.com/studioI/buttonTest.swf
It also has to reach a complete stop the first time the
button expands or else it won't run the shrink function on rollOut.
I put all of my code on the first frame of the movie clip's
actions layer so here's what mine looks like:
import mx.transitions.Tween;
import mx.transitions.easing.*;
function grow(who) {
var tw:Tween = new Tween(who, "_xscale", Strong.easeOut,
100, 400, 1, true);
var tw2:Tween = new Tween(who, "_yscale", Strong.easeOut,
100, 400, 1, true);
tw.onMotionFinished=function():Void{
who.onRollOut = function() {
shrink(who);
function shrink(who) {
var tw3:Tween = new Tween(who, "_xscale", Strong.easeOut,
400, 100, 1, true);
var tw4:Tween = new Tween(who, "_yscale", Strong.easeOut,
400, 100, 1, true);
this.onRollOver = function() {
grow(this);

Adobe air 2.6 iPhone animation tween class vs onEnterframe

Hi, Does anyone knows what's better to create alpha or slide animations on iPhone applications, using a tween class like Tweener or use the classic onEnterframe. What's the better choice, who's the better performance . Thanks, Nuno

Use Tween Class,
http://www.greensock.com/tweenlite/

External swf and the tween class

i have an external swf which i import into my main swf using
the loadMovie command. my external swf has some tween class
animations in it. if i run the main movie, the external swf movie
runs fine of course...but the tween classes are not loaded. am i
missing somthing?
here is the code from the external swf file which is applied
to a clickable movie clip of course.
this.onRollOver = function() {
rewind = false;
play();
var squaretween = new mx.transitions.Tween(previewthumb,
"_xscale", mx.transitions.easing.Elastic.easeOut, 0, 1200, .5,
true);
var squaretween = new mx.transitions.Tween(previewthumb,
"_yscale", mx.transitions.easing.Elastic.easeOut, 0, 1200, .5,
true);
squaretween.onMotionFinished = function() {
loadMovie("hotairlarge.swf",
"_root.homecontainer.printworkcontainer");
any help would be great!

try inserting the following to line 1,frame 1 your main swf:

Serious Flash bug?

Hello. I am a newbie to this forum, so I am sorry if this
message is off-topic. If it is, I would be obliged if anyone could
direct me to the correct place.
I am a veteran programmer but I am new to actionscript. I
have come across some strange behavour which is driving me mad.
Following is a part of my code :
...[snip]...
private var pnt:Point = new Point();
private var dirp:int;
private var fastp:int;
private var i:int;
private var pathB:Array;
...[snip]...
for (dirp=fastp; dirp<=i; dirp++) {
// BUG!!! If I UNCOMMENT 1 of the 2 following lines, code
gets mixed up.
// pnt.x=pathB[dirp][0].x+pathB[dirp][2].x;
// pnt.y=pathB[dirp][0].y+pathB[dirp][2].y;
pnt=new
Point(pathB[dirp][0].x+pathB[dirp][2].x,pathB[dirp][0].y+pathB[dirp][2].y);
if (addElement(pnt, dirp, pathB[dirp][2], pathB[dirp][3]+1))
return pathF;
As I mention above, if I uncomment //pnt.x=... or //pnt.y=...
or if I even replace them with something like pnt.x=pnt.x+1 ;
then my code gets mixed up and returns wrong results.
This is driving me nuts because these two lines shouldn't
have any effect since right below them there is
pnt=new Point(...);
which supposedly "cancels" the 2 previous instructions.
Right?
Could anyone, please, show me the obvious that I can't see?
Many thanks in advance,
Bill Kotsias

it's not necessarily a flash bug. there are situations where
assigning your pnt's x and y properties may trigger some other code
to execute and re-assigning those properties immediately afterwards
does not stop the other code from executing.
you need to isolate the minimum code needed to display the
issue before anyone will check it. you're nowhere close to that
now:
http://www.adobe.com/cfusion/mmform/index.cfm?name=wishform

Is it flash bug? Tween Class

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