This is a great tutorial into knowing the basics.
I have been following this up to now.
I added the background with the help of actionscript like you mentioned at the first lesson. However, I can’t see the animated stars now because the background is overlapping it. I tried to fix it, but eventually I removed the actionscript for the background, and just placed the movieclip in the stage manually.

question 1 : I would like to know how to get the background ‘with’ actionscript, and how to properly layer it.

question 2 : I tried to make the stars move according to my ship speed. I did what you told to get that, but it still doesn’t work. it gives this error :
1178: Attempted access of inaccessible property vy through a reference with static type com.asgamer.basics.Schip1

could someone help me with these two questions ?
Thanks in advance,
Tristan.

I think its because i dont have “setupStar()” in my “Star()” function, but every time i add it and try to run it i get: TypeError: Error #1009: Cannot access a property or method of a null object reference.
at Star/setupStar()
at Star()
at Engine()

any suggestions?

However, about the bouncing-on-the-edges-of-the-screen part, I’ve used this instead:

And found that it works a bit better. Now the values here are dependant on the stage size, but with the code from the tutorial, half of the ship goes out of the screen before it bounces.

//STAY IN THE SCREEN
if ( x > 480 )
{
vx = -vx;
}

else if ( x 370 )
{
vy = -vy;
}

else if ( y < 30 )
{
vy = -vy;
}

peace
jesta (turns the page)

This is a great tutorial. I was wondering if the code for the Starfield background can be modified to look like a 1st person point of view? In otherwords, we are traveling towards the stars and the stars are zooming past us?

This is terrific. Thanks very much.

Best,
Gary

The only thing I have “customized”, is the player code to get a smaller boundary for the ship to fly in.
Its really weird and frustrating to still get the message
“1136: Incorrect number of arguments. Expected 0.”

Can anybody help me?

Anyway, I have setup the stars and they are flowing rather well.

My question is, how do you get them to stop?

removeChild? If so, How does that work with multiple stars on stage at once?

If you want the Stars to go from left to right, use MrKrackham’s example above. If you want them to go from right to left, and your stars aren’t respawning, and if you’re an AS noob like me, here’s the problems.

public function setupLine(randomizeX:Boolean = false) : void
{
//inline conditional, looks complicated but it’s not.
x = randomizeX ? Math.random()*stageRef.stageWidth : 750; **has to be 750, this is where they respawn**
y = Math.random()*stageRef.stageHeight;
alpha = Math.random();
scaleX = Math.random();
scaleY = Math.random();

speed = 2 + Math.random()*2;
}

public function loop(e:Event) : void
{
x -= speed; ****has to be a minus sign, so they go left****

if (x < 0) ****this is where it got. don’t know why. it just did.****
setupLine();

}

}
}

1136:Incorrect number of arguments. Expected 0.