[AS3] AI TweenEvent loop stops after 6.5-7.5 times

[negative_antimatter]

I'm making a game where a bat (the white box) bounces back and forth trying to eat the character (the moth). Here's the game as it is now: swfcabin(dot)com/open/1335824567 Arrow keys to move.

The code for the bat checks if it is left or right of the moth, sets the bat's target position, and tweens it there. When the tween is finished, the process is suppose to repeat. This works perfectly 7 and a half times if the moth does not move and 6 and a half times if the moth is constantly in motion. I'm unable to figure out why it wouldn't work indefinitely. (Actually playing the game online just now seems to have the bat bouncing back and forth perfectly or less than one bounce. Now I'm really confused.)

Here's the code relevant to the bat:

var batX = 10;
var batY = 10;

//This sets the bat's x position to tween to
var batXAim:Number = 550 - bat_mc.width/2;
bat_mc.x = batX;
bat_mc.y = batY;

stage.addEventListener(Event.ENTER_FRAME, repeatFlowers);

function repeatFlowers(e:Event):void
{
    //stores location of bat_mc for checkLocation
    batX = bat_mc.x;
    batY = bat_mc.y;
    
    //keeps bat on screen
    if(bat_mc.x < 0 + bat_mc.width/2)
    {
        bat_mc.x = bat_mc.width/2;
    }
    if(bat_mc.x > 550 - bat_mc.width/2)
    {
        bat_mc.x = 550 - bat_mc.width/2;
    }
    if(bat_mc.y > 400 - bat_mc.height/2)
    {
        bat_mc.y = 400 - bat_mc.height/2;
    }
    if(bat_mc.y < 0 + bat_mc.height/2)
    {
        bat_mc.y = 0 + bat_mc.height/2;
    }
}



stage.addEventListener(Event.ENTER_FRAME, startCheckLocation);


function onFinish(e:TweenEvent):void
{
    stage.addEventListener(Event.ENTER_FRAME, checkLocation);
}


function checkLocation(e:Event):void
{
    stage.removeEventListener(Event.ENTER_FRAME, checkLocation);
    
    if(batX > mothLeft_mc.x)
    {
        batXAim = 0 + bat_mc.width/2;
    }
    if(batX < mothLeft_mc.x)
    {
        batXAim = 550 - bat_mc.width/2;
    }
         
    var tweenScaleX:Tween = new Tween(bat_mc, "x", None.easeNone,     batX, batXAim, 3, true);
    var tweenScaleY:Tween = new Tween(bat_mc, "y", None.easeNone, batY, mothLeft_mc.y, 3, true); 
    
    tweenScaleX.addEventListener(TweenEvent.MOTION_FINISH, onFinish);
}


function startCheckLocation(e:Event):void
{
    stage.removeEventListener(Event.ENTER_FRAME, startCheckLocation);
    stage.addEventListener(Event.ENTER_FRAME, checkLocation);
}

[negative_antimatter]

I've also tried this, but to the same effect.

//starts bat attack looping
checkLocation(null);

function checkLocation(e:TweenEvent):void
{
    if(batX > mothLeft_mc.x)
    {
        batXAim = 0 + bat_mc.width/2;
    }
    if(batX < mothLeft_mc.x)
    {
        batXAim = 550 - bat_mc.width/2;
    }
         
    var tweenScaleX:Tween = new Tween(bat_mc, "x", None.easeNone, batX, batXAim, 3, true);
    var tweenScaleY:Tween = new Tween(bat_mc, "y", None.easeNone, batY, mothLeft_mc.y, 3, true); 
    
    tweenScaleX.addEventListener(TweenEvent.MOTION_FINISH, onFinish);
}

function onFinish(e:TweenEvent):void
{
    if(batX > mothLeft_mc.x)
    {
        batXAim = 0 + bat_mc.width/2;
    }
    if(batX < mothLeft_mc.x)
    {
        batXAim = 550 - bat_mc.width/2;
    }
         
    var tweenScaleX:Tween = new Tween(bat_mc, "x", None.easeNone, batX, batXAim, 3, true);
    var tweenScaleY:Tween = new Tween(bat_mc, "y", None.easeNone, batY, mothLeft_mc.y, 3, true); 
    
    tweenScaleX.addEventListener(TweenEvent.MOTION_FINISH, checkLocation);
}

[negative_antimatter]

This post sounds like it may address my problem, but I'm not totally sure what he's talking about: codingjourney. blogspot. com/2008/11/as3-tween-class-randomly-stops-during.html

[negative_antimatter]

Well, whatever was going on, I think TweenLite fixed it.