Hi,
after googling around and reading more and more about
the upcoming features of the FLASH V10.0 (Codename:
ASTRO) platform (
pixelshader-like additions, audio/synth
features ...) I decided to do some research on it and give
it a try.
Well, as a simple HelloWorld effect I did a basic 3D star-
field (
Flash Player 9.0 required).
http://labs.weltenkonstrukteur.de/simplestarfieldIt is written in pure ActionScript 3.0.
Source is of course available:
stars.aspackage
{
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.events.Event;
/**
* ...
* @author benny!weltenkonstrukteur.de
*/
public class Stars extends Sprite
{
private var bitmap:Bitmap;
private var canvas:BitmapData;
private var sw:int, sh:int, snum:int;
private var stars:Array;
private var colors:Array;
public function Stars() {
snum = 250;
sw = stage.stageWidth;
sh = stage.stageHeight;
colors = new Array(
"0x000000", // never used
"0xFFFFFF",
"0xBBBBBB",
"0x888888",
"0x444444"
);
init();
addEventListener( "enterFrame", run );
}
private function init():void {
canvas = new BitmapData( sw, sh, false );
bitmap = new Bitmap( canvas );
stars = new Array( snum );
for ( var i:int = 0; i < snum ; i++ ) {
stars[i] = new StarModel();
}
addChild( bitmap );
}
private function run( e:Event ):void {
canvas.lock();
canvas.fillRect( canvas.rect, 0x111122 );
for ( var i:int = 0; i < snum ; i++ ) {
stars[i].move();
canvas.setPixel( stars[i].sx, stars[i].sy, colors[ stars[i].scol ] );
}
canvas.unlock();
}
}
}
StarModel.aspackage
{
/**
* ...
* @author benny!weltenkonstrukteur.de
*/
public class StarModel
{
private var x:Number, y:Number, z:Number, zv:Number;
public var sx:int, sy:int, scol:int;
public function StarModel() {
init();
}
public function move():void {
z = z - zv;
sx = (int)(x / z * 100 + 320 );
sy = (int)(y / z * 100 + 200 );
scol = Math.round( z / 100 );
if ( sx < 0 || sx > 640
|| sy < 0 || sy > 400
|| z < 1 ) {
init();
}
}
private function init():void {
this.x = Math.random() * 1000 - 500
this.y = Math.random() * 1000 - 500 ;
this.z = Math.random() * 500 + 100;
this.zv = Math.random() * 5 + 1;
this.scol = Math.round(this.z / 100);
}
}
}
