AS3 Tweening with If Statement, animation problem

[ZIGMEGA]

Hello,

I've got this Flash AS3 code I'm playing around with below. Im trying to get the spheres created to move off the stage at frame 81 (of a 360 frame timeline). I'm using an If statement but I think its causing problems as the tween is happening every time the code runs after frame 81 causing the spheres to judder.

If you let the animation loop the problem seems to go away?

I'm sure this can't be too tricky, please help an absolute beginner out!

Many thanks
ZM

import fl.transitions.Tween;
    import fl.transitions.easing.*;
    import fl.transitions.TweenEvent;
    
    //number of balls
    var numBalls:uint = 100;
    var defaultBallSize:uint = 15;
    
    //init
    makeDots();
    
    function makeDots():void {
        //create desired number of balls
        for (var ballNum:uint=0; ballNum<numBalls; ballNum++){
            var c1:Number = 0xA35853;
            var c2:Number = 0xA35853;
    	
    
            //create ball
    		
    		var thisBall:MovieClip = new MovieClip();
            thisBall.graphics.beginFill(c1, .9);
            /*thisBall.graphics.lineStyle(defaultBallSize/3, c2, .9);*/
            thisBall.graphics.drawCircle(defaultBallSize, defaultBallSize, defaultBallSize);
            thisBall.graphics.endFill();
    		
            addChild(thisBall);
    		
            //coordinates
    		
    		
    	
            thisBall.x = Math.random() * stage.stageWidth;
            thisBall.y = Math.random() * stage.stageHeight;
    		
    	
    			
    		//percieved depth
            thisBall.ballNum = ballNum;
            thisBall.depth = ballNum/numBalls;
            thisBall.scaleY = thisBall.scaleX = thisBall.alpha = ballNum/numBalls;
            //velocity
            thisBall.vx = 0;
            thisBall.vy = 0;
            thisBall.vz = 0;
    
            //ball animation
            thisBall.addEventListener(Event.ENTER_FRAME, animateBall);
    		/*var myTweenOn:Tween = new Tween(thisBall, "alpha", Regular.easeIn, 0, 0.3, 6, true);*/
        }
    }
    
    
    
    
    var dampen:Number = 0.95;
    var maxScale:Number = 1.3;
    var minScale:Number = 0.1;
    var maxAlpha:Number = 0.4;
    var minAlpha:Number = 0.3;
    function animateBall(e:Event):void{
        var thisBall:Object = e.target;
    
    
    	//apply randomness to velocity
        thisBall.vx += Math.random() * 0.2 - 0.1;
        thisBall.vy += Math.random() * 0.2 - 0.1;
        thisBall.vz += Math.random() * 0.002 - 0.001;
    
        thisBall.x += thisBall.vx;
        thisBall.y += thisBall.vy;
        thisBall.scaleX = thisBall.scaleY += thisBall.vz;
        thisBall.alpha += thisBall.vz;
        thisBall.vx *= dampen;
        thisBall.vy *= dampen;
        thisBall.vz *= dampen;
    	
    	
    	
    	
    	if(currentFrame > 81) {
    		var myTween:Tween = new Tween(thisBall, "alpha", Regular.easeOut, thisBall.alpha, 0, 2, true);
    		
    	
    		/*thisBall.alpha = minAlpha;*/
    	}
    	else(currentFrame < 82);  {
    		thisBall.alpha = thisBall.alpha;
    	}
    	
    	if(currentFrame > 81 && thisBall.x < stage.stageWidth/2 ) { 
    			var myTweenXLeft:Tween = new Tween(thisBall, "x", None.easeOut, thisBall.x, thisBall.x - 140, 1, true);
    			thisBall.x = thisBall.x;
    	}
    	if(currentFrame > 81 && thisBall.x > stage.stageWidth/2 ) { 
    			var myTweenXRight:Tween = new Tween(thisBall, "x", Regular.easeOut, thisBall.x, thisBall.x + 140, 1, true);
    			thisBall.x = thisBall.x;
    	}
    	
    	
    	//else(currentFrame < 81);  {
    	//	thisBall.x = thisBall.x;
    	//	/*thisBall.y = thisBall.y;*/
    	//}
    	
    	if(currentFrame > 81 && thisBall.y < stage.stageHeight/2 ) { 
    			var myTweenYUp:Tween = new Tween(thisBall, "y", Regular.easeOut, thisBall.y, thisBall.y - 115, 1, true);
    			thisBall.y = thisBall.y;
    	}
    	if(currentFrame > 81 && thisBall.y > stage.stageHeight/2 ) { 
    			var myTweenYDown:Tween = new Tween(thisBall, "y", Regular.easeOut, thisBall.y, thisBall.y + 115, 1, true);
    			thisBall.y = thisBall.y;
    	}
    	
    	
    	//else(currentFrame < 81);  {
    	//	/*thisBall.x = thisBall.x;*/
    	//	thisBall.y = thisBall.y;
    	//}
    	
    	
    	
        if(thisBall.x > stage.stageWidth) {
            thisBall.x = 0 - thisBall.width;
        }
        else if(thisBall.x < 0 - thisBall.width) {
            thisBall.x = stage.stageWidth;
        }
        if(thisBall.y > stage.stageHeight) {
            thisBall.y = 0 - thisBall.height;
        }
        else if(thisBall.y < 0 - thisBall.height) {
            thisBall.y = stage.stageHeight;
        }
    
        if (thisBall.scaleX > maxScale){
            thisBall.scaleX = thisBall.scaleY = maxScale;
        }
        else if (thisBall.scaleX < minScale){
            thisBall.scaleX = thisBall.scaleY = minScale;
        }
        if (thisBall.alpha > maxAlpha){
            thisBall.alpha = maxAlpha;
        }
        else if (thisBall.alpha < minAlpha){
            thisBall.alpha = minAlpha;
        }
    }
    
    function randomColor():Number{
        return Math.floor(Math.random() * 16777215);
    }
    
    
    /*
        function fadeBall(e:Event):void{
    		var thisBall:Object = e.target;
    	if(currentFrame > 48) {
    		thisBall.alpha == 0;
    	}
    }*/

[fruitbeard]

Hi,

I'm not entirely sure what you are trying to do, with my mock up as you didnt include any files, I come up with this.

import fl.transitions.Tween;
import fl.transitions.easing.*;
import fl.transitions.TweenEvent;

//number of balls
var numBalls:uint = 100;
var defaultBallSize:uint = 15;

//init
makeDots();

function makeDots():void
{
    //create desired number of balls
    for (var ballNum:uint=0; ballNum<numBalls; ballNum++)
    {
        var c1:Number = 0xA35853;
        var c2:Number = 0xA35853;

        //create ball

        var thisBall:MovieClip = new MovieClip();
        thisBall.graphics.beginFill(c1, .9);
        /*thisBall.graphics.lineStyle(defaultBallSize/3, c2, .9);*/
        thisBall.graphics.drawCircle(defaultBallSize, defaultBallSize, defaultBallSize);
        thisBall.graphics.endFill();

        //coordinates;

        thisBall.x = Math.random() * stage.stageWidth;
        thisBall.y = Math.random() * stage.stageHeight;

        //percieved depth
        thisBall.ballNum = ballNum;
        thisBall.depth = ballNum / numBalls;
        thisBall.scaleY = thisBall.scaleX = thisBall.alpha = ballNum / numBalls;
        //velocity
        thisBall.vx = 0;
        thisBall.vy = 0;
        thisBall.vz = 0;

        //ball animation
        thisBall.addEventListener(Event.ENTER_FRAME, animateBall);
        /*var myTweenOn:Tween = new Tween(thisBall, "alpha", Regular.easeIn, 0, 0.3, 6, true);*/
        addChild(thisBall);
    }
}

var dampen:Number = 0.95;
var maxScale:Number = 1.3;
var minScale:Number = 0.1;
var maxAlpha:Number = 0.4;
var minAlpha:Number = 0.3;

function animateBall(e:Event):void
{
    var thatBall:Object = e.target;
    var cFrame:Number = currentFrame;

    //apply randomness to velocity
    thatBall.vx +=  Math.random() * 0.2 - 0.1;
    thatBall.vy +=  Math.random() * 0.2 - 0.1;
    thatBall.vz +=  Math.random() * 0.002 - 0.001;

    thatBall.x +=  thatBall.vx;
    thatBall.y +=  thatBall.vy;
    thatBall.scaleX = thatBall.scaleY +=  thatBall.vz;
    thatBall.alpha +=  thatBall.vz;
    thatBall.vx *=  dampen;
    thatBall.vy *=  dampen;
    thatBall.vz *=  dampen;

    if (cFrame > 81)
    {
        var myTween:Tween = new Tween(thatBall,"alpha",Regular.easeOut,thatBall.alpha,0,2,true);

        if (cFrame > 81 && thatBall.x < stage.stageWidth / 2 )
        {
            var myTweenXLeft:Tween = new Tween(thatBall,"x",None.easeOut,thatBall.x,thatBall.x - 140,1,true);
        }
        else if (cFrame > 81 && thatBall.x > stage.stageWidth / 2 )
        {
            var myTweenXRight:Tween = new Tween(thatBall,"x",Regular.easeOut,thatBall.x,thatBall.x + 140,1,true);
        }

        if (cFrame > 81 && thatBall.y < stage.stageHeight / 2 )
        {
            var myTweenYUp:Tween = new Tween(thatBall,"y",Regular.easeOut,thatBall.y,thatBall.y - 115,1,true);
        }
        else if (cFrame > 81 && thatBall.y > stage.stageHeight / 2 )
        {
            var myTweenYDown:Tween = new Tween(thatBall,"y",Regular.easeOut,thatBall.y,thatBall.y + 115,1,true);
        }

        if (thatBall.x > stage.stageWidth)
        {
            thatBall.x = 0 - thatBall.width;
        }
        else if (thatBall.x < 0 - thatBall.width)
        {
            thatBall.x = stage.stageWidth - thatBall.width;
        }
        if (thatBall.y > stage.stageHeight)
        {
            thatBall.y = 0 - thatBall.height;
        }
        else if (thatBall.y < 0 - thatBall.height)
        {
            thatBall.y = stage.stageHeight - thatBall.height;
        }

        if (thatBall.scaleX > maxScale)
        {
            thatBall.scaleX = thatBall.scaleY = maxScale;
        }
        else if (thatBall.scaleX < minScale)
        {
            thatBall.scaleX = thatBall.scaleY = minScale;
        }
        if (thatBall.alpha > maxAlpha)
        {
            thatBall.alpha = maxAlpha;
        }
        else if (thatBall.alpha < minAlpha)
        {
            thatBall.alpha = minAlpha;
        }

        thatBall.removeEventListener(Event.ENTER_FRAME, animateBall);
        return;
    }
}

function randomColor():Number
{
    return Math.floor(Math.random() * 16777215);
}

/*
function fadeBall(e:Event):void
{
var thisBall:Object = e.target;
if (cFrameFrame > 48)
{
thisBall.alpha == 0;
}
}*/ 

[freshmints]

Have you tried using event dispatcher ? The dispatcher could be easily triggered from any frame you want