Hi Kalle, put that code I posted in the Ship class in the loop() method right before the “y += vy;” line. That should do it!

// enforce speed limit – find length of vector
// and scale down to maxSpeed if necessary
var currentSpeed:Number = Math.sqrt((vx * vx) + (vy * vy));
if(currentSpeed > maxSpeed){
vx *= maxSpeed / currentSpeed;
vy *= maxSpeed / currentSpeed;
}
___________________________________________________________

Where?
More exakt plz? =)

// enforce speed limit – find length of vector
// and scale down to maxSpeed if necessary
var currentSpeed:Number = Math.sqrt((vx * vx) + (vy * vy));
if(currentSpeed > maxSpeed){
vx *= maxSpeed / currentSpeed;
vy *= maxSpeed / currentSpeed;
}

Been working on using them to build a car game. So far, so good. have the engine.as and car.as built and running. Essentially using your ship.as class.

Now here is the thing I have movieclip built for the car. within it it has movieclip headlights to turn on and off. with frame labels = “headlightson” and “headlightsoff” similar to what you have done with the laser graphics here but included as movieclip inside the car movieclip.

Can I add keyboard event listener to Car.as so that when ctrl key is pressed the label is sent to headlightson (frame2)? and if pressed a second time to play headlightsoff (frame1)?

Sorry for the long post but movieclips within movieclips cause me no amount of troubles..

I am a super newbie with OOP of AS and followed through your tutorial and very found it very informative.. however, now I at a brick war as I am trying to add rocks and hitTest… can anyone help?

Other than a new class called Rock.as and added a destroy function in ship as well.. the code for the rest is more of less the same..

Has no clue how to identify which rock to test hit

Rock.as
==============================================================
package {

import flash.display.*;
import flash.events.*;

public class Rock extends MovieClip{
public var radius:Number;
public var cnum:Number;
var radians:Number=0;
var speed:Number=0;

public function Rock(inputRadius:Number):void {
radius=inputRadius;
speed=0.1+0.5*Math.random();
this.addEventListener (Event.ENTER_FRAME, moveCircle);
}

public function moveCircle (e:Event) {
radians += speed;

x+=Math.round(radius*Math.cos(radians))+1;
y+=Math.round(radius*Math.sin(radians))+1;

if (x > stage.stageWidth)
x = 0;
else if (x stage.stageHeight)
y = 0;
else if (y < 0)
y = stage.stageHeight;
}
}
}
============================================================
ship.as (addition)
public function destroy():void {
parent.removeChild(this);
removeEventListener(Event.ENTER_FRAME, loop);
}
=========================================================
main.fla

import flash.utils.Timer;

var level:int=1;

genRocks();

function genRocks() {
for (var count:int=0; count<level+2; count++) {
var randomSize=Math.random()*2;
var newRock:Rock=new Rock(randomSize);
addChild(newRock);

newRock.x=Math.random()*550;
newRock.y=Math.random()*400;

newRock.scaleX=Math.random()*2+1.5;
newRock.scaleY=Math.random()*2+1.5;
}
}
var gameTimer:Timer=new Timer(30);
gameTimer.addEventListener(TimerEvent.TIMER,gameTimerFunc);
gameTimer.start();

function gameTimerFunc(t:TimerEvent):void{
if(ship.hitTestObject(newRock)){
trace (“hit”);
ship.destroy();
gameTimer.stop();
}
}
=================================================

I get undefined property newRock.. please help! thanks!