flash on 2010-1-30
/**
* Copyright yama3 ( http://wonderfl.net/user/yama3 )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/jbhT
*/
package {
import flash.display.Sprite;
import flash.display.BitmapData;
import flash.display.Bitmap;
import flash.geom.ColorTransform;
import flash.display.BitmapDataChannel;
import flash.filters.BlurFilter;
import flash.events.Event;
import flash.events.MouseEvent;
[SWF(width=465, height=465, backgroundColor=0, frameRate=60)]
public class FlashTest extends Sprite {
// write as3 code here..
private var bmpdata:BitmapData;
private var colortrans:ColorTransform;
private var filter:BlurFilter;
private var vectormap:BitmapData;
private var particles:Array;
private var particle_number:uint = 25000;
private var size:Number = 465;
public function FlashTest() {
bmpdata = new BitmapData(size,size,false,0);
addChild(new Bitmap(bmpdata));
colortrans = new ColorTransform(0.95,0.99,0.99);
filter = new BlurFilter(2,2,1);
vectormap = new BitmapData(size,size,false,0);
reset();
addEventListener(Event.ENTER_FRAME, enterframe);
stage.addEventListener(MouseEvent.CLICK, reset);
}
private function reset(e:MouseEvent = null):void {
var randomSeed:int = Math.random()*0xffffffff;
var colors:uint = BitmapDataChannel.RED | BitmapDataChannel.GREEN;
vectormap.perlinNoise(size/2,size/2,4,randomSeed,false,true,colors);
particles = new Array(particle_number);
for(var i:int=0; i<particle_number;i++) {
particles[i] = new Particle(Math.random()*size,Math.random()*size);
}
}
private function enterframe(e:Event):void {
bmpdata.applyFilter(bmpdata,bmpdata.rect,bmpdata.rect.topLeft,filter);
bmpdata.colorTransform(bmpdata.rect,colortrans);
bmpdata.lock();
for(var i:int=0; i<particle_number; i++) {
var p:Particle = particles[i];
var col:uint = vectormap.getPixel(p.x,p.y);
p.ax += ((col>>16&0xff)-128)*0.0005;
p.ay += ((col>>8&0xff)-128)*0.0005;
p.x += p.vx += p.ax;
p.y += p.vy += p.ay;
if(p.x>size) {p.x -= size;}
else if(p.x < 0) {p.x += size;}
if(p.y>size) {p.y -= size;}
else if(p.y<0){p.y+=size;}
bmpdata.setPixel(p.x,p.y,0xffffff);
p.ax *= 0.96; p.ay *= 0.96;
p.vx *= 0.92; p.vy *= 0.92;
}
bmpdata.unlock();
}
}
}
class Particle {
public var x:Number;
public var y:Number;
public var ax:Number = 0;
public var ay:Number = 0;
public var vx:Number = 0;
public var vy:Number = 0;
function Particle(px:Number, py:Number) {
x = px;
y = py;
}
}