Actionscript - randomly drop from moving plane MC - random

Question

I wasn't quite sure how to describe my problem in the subject. I have a plane MC and a crate MC. The plane only flies along the y axis from the bottom of the screen to top. Along the way I want it to randomly drop the crate MC. My code is below. The problem is that the crates spontaneously keep spawning and not near the plane.
function movePlane():void
{
var tempY:Number;
var tempX:Number;
var tempCrate:MovieClip;
var tempPlane:MovieClip;
for (var j:int =planes.length-1; j>=0; j--)
{
tempPlane = planes[j];
tempPlane.y += tempPlane.planeSpeed;
tempCrate = new Crate();
tempY = Math.floor(Math.random() * tempPlane.y);
tempX = Math.floor(Math.random() * tempPlane.x);
}
tempCrate.y = tempY;
tempCrate.x = tempX;
addChild(tempCrate);
}

Answer 1

Edited answer:
To make a crate drop on each plane once you can create this behavior by creating a timer on each plane with a random time value. Like this:
function addRandomCreation():void{
var animationTime:Number = 5000; //The time the planes will be animating in ms
for(var i:int = 0; i < planes.length; i++){
var planeTimer:Timer = new Timer(Math.round(animationTime * Math.random()));
planeTimer.addEventListener(TimerEvent.TIMER, timerComplete(i));
planeTimer.start();
}
}
function timerComplete(planeID:int):function{
return function(event:TimerEvent):void{
event.target.stop();
event.target.removeEventListener(event.type, arguments.callee);
var tempCrate:MovieClip = new Crate();
tempY = Math.round(Math.random() * planes[planeID].y);
tempCrate.y = tempY;
tempCrate.x = planes[planeID].x;
addChild(tempCrate);
}
}
Edited answer:
This will create a crate on the same x axis as the plane it's being created by.
function movePlane():void
{
var tempY:Number;
var tempX:Number;
var tempCrate:MovieClip;
var tempPlane:MovieClip;
for (var j:int =planes.length-1; j>=0; j--)
{
tempPlane = planes[j];
tempPlane.y += tempPlane.planeSpeed;
tempCrate = new Crate();
tempY = Math.floor(Math.random() * tempPlane.y);
tempCrate.y = tempY;
tempCrate.x = tempPlane.x;
addChild(tempCrate);
}
}
You have have to use addChild each time you create a new Crate otherwise it will just create a lot of crates which only the last one will be added to the stage. To do this you have to move the addChild into the loop.
function movePlane():void
{
var tempY:Number;
var tempX:Number;
var tempCrate:MovieClip;
var tempPlane:MovieClip;
for (var j:int =planes.length-1; j>=0; j--)
{
tempPlane = planes[j];
tempPlane.y += tempPlane.planeSpeed;
tempCrate = new Crate();
tempY = Math.floor(Math.random() * tempPlane.y);
tempX = Math.floor(Math.random() * tempPlane.x);
tempCrate.y = tempY;
tempCrate.x = tempX;
addChild(tempCrate);
}
}