Comments on: Asteroids 2.03: New Asteroid Shapes http://flashforlearning.com/2005/04/asteroids-203-new-asteroid-shapes/ Knowledge Management > Learning Strategy > E-Learning > Flash Wed, 07 Jan 2009 04:07:05 +0000 http://wordpress.org/?v=2.6.2 By: Aaron http://flashforlearning.com/2005/04/asteroids-203-new-asteroid-shapes/#comment-4 Aaron Tue, 30 Nov 1999 00:00:00 +0000 http://beta.aaron21.com/?p=8#comment-4 Thanks a lot for the tip, Grant! I *knew* there had to be an easier way than what I was originally trying to do, and while my currently displayed solution works, there's not a lot of differentiation in the appearance of the asteroids. I attended your presentation at FlashForward 2005, and while it's been a long while since I picked up Flash, you reminded me why I started playing with it back in 1996, which is why I'm revisiting old projects with AS2 now. Thanks a lot for the tip, Grant!

I knew there had to be an easier way than what I was originally trying to do, and while my currently displayed solution works, there’s not a lot of differentiation in the appearance of the asteroids.

I attended your presentation at FlashForward 2005, and while it’s been a long while since I picked up Flash, you reminded me why I started playing with it back in 1996, which is why I’m revisiting old projects with AS2 now.

]]> By: Grant Skinner http://flashforlearning.com/2005/04/asteroids-203-new-asteroid-shapes/#comment-5 Grant Skinner Tue, 30 Nov 1999 00:00:00 +0000 http://beta.aaron21.com/?p=8#comment-5 Noticed your trackback ping, and thought I might be able to help. Probably the best algorithm for generating random asteroids is to rotate around a central point, drawing lines a random distance away from the center at random increments. Difficult to explain using English, but easy to code: <br /><br /> var radius:Number = 30;<br /> lineStyle(0,0xFFFFFF,100);<br /> beginFill(0,50);<br /> moveTo(0,radius);<br /> var rotation:Number = 0;<br /> while (rotation < Math.PI*2-1/2) {<br />    rotation += 1/4+random(100)/500;<br />    var z:Number = radius+random(radius/2);<br />    lineTo(Math.sin(rotation)*z,Math.cos(rotation)*z);<br /> }<br /> lineTo(0,radius);<br /> <br /> I used this logic to create my simple asteroids game: <a href="http://www.gskinner.com/blog/archives/2005/02/tiny_addictive.html" rel="nofollow">http://www.gskinner.com/blog/archives/2005/02/tiny_addictive.html</a> Noticed your trackback ping, and thought I might be able to help. Probably the best algorithm for generating random asteroids is to rotate around a central point, drawing lines a random distance away from the center at random increments. Difficult to explain using English, but easy to code:

var radius:Number = 30;
lineStyle(0,0xFFFFFF,100);
beginFill(0,50);
moveTo(0,radius);
var rotation:Number = 0;
while (rotation < Math.PI2-1/2) {
   rotation += 1/4+random(100)/500;
   var z:Number = radius+random(radius/2);
   lineTo(Math.sin(rotation)z,Math.cos(rotation)*z);
}
lineTo(0,radius);

I used this logic to create my simple asteroids game: http://www.gskinner.com/blog/archives/2005/02/tiny_addictive.html

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