Creat Boundaries - actionscript-3

Question

Hello Everyone again :) I'm having an issue with boundaries actually about creating boundaries. In my stage I got 2 mc's names : Dispenser and Puller. Dispenser creating particles and puller is pulling them. I just need to set a boundary like a path.
But i couldn't so asking for your help :)
Bdw the code is from this site : http://www.freeactionscript.com/?s=puller&x=0&y=0
package
{
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
public class Main extends Sprite
{
// you can play around with these
private var particlesTotal:Number = 50;
private var particleSpeed:Number = 10;
private var particleFadeoutSpeed:Number = .0175;
// don't change these
private var particlesCurrent:Number = 0;
private var particlesArray:Array;
private var radians:Number;
private var _sayac:uint;
public function Main():void
{
init();
}
private function init():void
{
radians = 180 / Math.PI;
particlesArray = [];
addEventListener(Event.ENTER_FRAME, onEnterFrameLoop);
dispenser_mc.addEventListener(MouseEvent.MOUSE_DOWN, onThingDown);
puller_mc.addEventListener(MouseEvent.MOUSE_DOWN, onThingDown);
dispenser_mc.addEventListener(MouseEvent.MOUSE_UP, onThingUp);
puller_mc.addEventListener(MouseEvent.MOUSE_UP, onThingUp);
}
private function onThingDown(event:MouseEvent):void
{
event.currentTarget.startDrag();
}
private function onThingUp(event:MouseEvent):void
{
event.currentTarget.stopDrag();
}
private function createParticle(target1:MovieClip, target2:MovieClip):void
{
if(particlesTotal <= particlesCurrent)
{
return;
}
particlesCurrent++;
var tempParticle:Particle = new Particle();
tempParticle.x = (target1.x - target1.width / 2) + (Math.random() * target1.width);
tempParticle.y = (target1.y - target1.height / 2) + (Math.random() * target1.height);
tempParticle.rotation = Math.random()*360;
tempParticle.rot = Math.atan2(target1.y - target2.y, target1.x - target2.x);
tempParticle.xSpeed = Math.cos(tempParticle.rot) * radians / particleSpeed;
tempParticle.ySpeed = Math.sin(tempParticle.rot) * radians / particleSpeed;
tempParticle.mass = tempParticle.width / 2 + tempParticle.height / 2;
particlesArray.push(tempParticle);
addChild(tempParticle);
}
private function updateParticle():void
{
for (var i = 0; i < particlesArray.length; i++)
{
var tempParticle:MovieClip = particlesArray[i];
tempParticle.x -= tempParticle.xSpeed;
tempParticle.y -= tempParticle.ySpeed;
tempParticle.alpha -= particleFadeoutSpeed;
// I know i can set boundries here but idk how to so :)
if(tempParticle.hitTestObject(puller_mc))
{
destroyParticle(tempParticle);
_sayac++;
trace(_sayac);
}
else if (tempParticle.alpha <= 0)
{
destroyParticle(tempParticle);
}
else if (tempParticle.x < 0)
{
destroyParticle(tempParticle);
}
else if (tempParticle.x > stage.stageWidth)
{
destroyParticle(tempParticle);
}
else if (tempParticle.y < 0)
{
destroyParticle(tempParticle);
}
else if (tempParticle.y > stage.stageHeight)
{
destroyParticle(tempParticle);
}
}
}
private function destroyParticle(particle:MovieClip):void
{
for (var i = 0; i < particlesArray.length; i++)
{
var tempParticle:MovieClip = particlesArray[i];
if (tempParticle == particle)
{
particlesCurrent--;
particlesArray.splice(i,1);
removeChild(tempParticle);
}
}
}
private function onEnterFrameLoop(event:Event):void
{
createParticle(dispenser_mc, puller_mc);
updateParticle();
}
}
}

Answer 1

actually there is no boundary in this code. let me explain the main parts of this code for you:
this is the most important part:
tempParticle.rot = Math.atan2(target1.y - target2.y, target1.x - target2.x);
tempParticle.xSpeed = Math.cos(tempParticle.rot) * radians / particleSpeed;
tempParticle.ySpeed = Math.sin(tempParticle.rot) * radians / particleSpeed;
rot is the angle to reach the puller.
xSpeed is how much the particle should go to right  every frame to reach the puller.
ySpeed is how much the particle should go to down every frame to reach the puller.
and in updateParticle function, the partcle will move, according to xSpeed and ySpeed.
so the correct xSpeed and YSpeed will cause particles to go straight.not a boundary !
I   h ☻ p e   I explained good and ,
I   h ☺ p e   this helps !