Gas
/**
* Copyright jerryrom ( http://wonderfl.net/user/jerryrom )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/iQcm
*/
// forked from jerryrom's Grass
// forked from jerryrom's Curtain
// forked from jerryrom's Corn
// forked from jerryrom's Pole
// forked from jerryrom's Waterfall
// forked from Hasufel's Space Comet
package {
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageQuality;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.filters.BlurFilter;
import flash.geom.Point;
[SWF(width=465, height=465, backgroundColor=0x000000, frameRate=60)]
public class Gas extends Sprite {
private var cvs:BitmapData;
private var particles:Array = [];
private var h:int = stage.stageHeight;
private var w:int = stage.stageWidth;
private var w4:int = Math.round(w/4);
private var w8:int = Math.round(w/8);
private var c:uint = 0xFFCECEF6;
private var theta:Number = 0;
private var blur:BlurFilter;
private var sign:int = 1;
public function Gas(){
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;
stage.quality = StageQuality.LOW;
graphics.beginFill(0x000000);
graphics.drawRect(0, 0, 465, 465);
graphics.endFill();
blur = new BlurFilter(10,10,1);
cvs = new BitmapData(w,h,true,0);
addChild(new Bitmap(cvs)) as Bitmap;
addEventListener(Event.ENTER_FRAME,update);
}
private function update(e:Event):void{
cvs.applyFilter(cvs,cvs.rect,new Point(0,0),blur);
cvs.lock();
var n:int = particles.length;
while(n--) {
var p:Particle = particles[n];
p.vx *= 1.01;
p.vy *= 1.01;
p.x+=p.vx;
p.y+=p.vy;
var c1:uint = uint(0xff * (465-p.y) /465) << 24 | 0x00ffffff;
cvs.setPixel32(p.x, p.y, p.c&c1);
if (p.y<0 || h<p.y || p.x<0 || p.x>w){
particles.splice(n,1);
}
}
cvs.unlock();
n = 20;
while (n--) {
//createParticle(Math.random()*w, h, c , 2*(Math.random()*Math.cos(theta)-0.5), -(Math.random()),true);
createParticle(Math.random()*w, Math.random()*h, c , 2*(Math.random()-0.5), 2*(Math.random()-0.5),true);
}
theta += 0.05
}
private function createParticle(xx:Number, yy:Number, c:int, vx:Number, vy:Number, type:Boolean):void {
var p:Particle = new Particle();
p.x = xx;
p.y = yy;
p.vx = vx;
p.vy = vy;
p.c = c;
particles.push(p);
}
}
}
class Particle {
public var x:Number;
public var y:Number;
public var vx:Number;
public var vy:Number;
public var c:uint;
}