forked from: black hole galaxy simulation

'black hole galaxy simulation' by flanture

by bradsedito 12 Dec 2012

• Forked from flanture's black hole galaxy simulation
• Diff: 4
• Related works: 2
Embed

/**
 * Copyright bradsedito ( http://wonderfl.net/user/bradsedito )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/ly37
 */

// forked from flanture's black hole galaxy simulation
// forked from yama3's flash on 2011-5-27
// 'black hole galaxy simulation' by flanture
package {
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.events.MouseEvent;
    import flash.filters.BlurFilter;
    import flash.filters.ColorMatrixFilter;
    import flash.filters.GlowFilter;
    import flash.geom.Matrix;
    import flash.geom.Point;
    
    [SWF(width="1000", height="618", backgroundColor="0")]
    
    public class FlashTest extends Sprite {
        private var NUM:int = 200;
        private var p:Particle = new Particle(); 
        private var bd:BitmapData = new BitmapData(stage.stageWidth, stage.stageHeight, true, 0);
        private var m:Matrix = new Matrix(1, 0, 0, 1, 0, 0);
        public function FlashTest() {
            Wonderfl.capture_delay(10);
            stage.frameRate = 90;
            var bmp:Bitmap = new Bitmap(bd);
            bd.fillRect(bd.rect, 0);
            addChild(bmp);
            for(var i:int=0; i<NUM; i++) {
                var next:Particle = p;
                p = new Particle();
                p.next = next;
                addChild(p);
            }
            addEventListener(Event.ENTER_FRAME, onEnterFrame);
            stage.addEventListener(MouseEvent.MOUSE_DOWN, onDown);
            stage.addEventListener(MouseEvent.MOUSE_UP, onUp);
            stage.addEventListener(Event.MOUSE_LEAVE, onUp);                      
        }
        private var isDown:Boolean = false;
        private function onDown(e:MouseEvent):void {
            isDown = true;
        }
        private function onUp(e:Event):void {
            isDown = false;
        }
        private function onEnterFrame(e:Event):void {
            if(!stage) return;
            var current:Particle = this.p;
            var p:Point = isDown?new Point(stage.mouseX, stage.mouseY):null;
            do {
                current.update(p);
            } while(current = current.next)
            bd.lock();
            bd.applyFilter(bd, bd.rect, new Point(), new ColorMatrixFilter([
            0.9994, 0, 0, 0, 0,
            0, 0.9994, 0, 0, 0,
            0, 0, 0.9994, 0, 0,
            0, 0, 0, 0.9994, 0,
            ]));
            bd.draw(stage);
            bd.applyFilter(bd, bd.rect, new Point(), new BlurFilter(4, 4, 2));
            bd.unlock();
        }
    }
}

import flash.display.*;
import flash.geom.Point;

class Particle extends Sprite {
    public var next:Particle;
    private var vx:Number;
    private var vy:Number;
    private var vz:Number;
    public function Particle() {
        graphics.beginFill(0x8888| 0xffffff * Math.random(), 1);
        graphics.drawRect(-1, -1, 2, 2);
        init();
    }
    private function init():void {
        var theta:Number = Math.random() * Math.PI * 2;
        var phi:Number = Math.random() * Math.PI; phi = - Math.PI * 0.35;
        var x:Number = Math.cos(theta);
        var y:Number = Math.sin(theta) * Math.cos(phi);
        var z:Number = Math.sin(theta) * Math.sin(phi);
        var px:Number = Math.random() - 0.5;
        var py:Number = Math.random() - 0.5;
        var pz:Number = Math.random() - 0.5;
        var i:Number = px * x + py * y + pz * z;
        px -= i * x;
        py -= i * y;
        pz -= i * z;
        
        i = py * Math.sin(phi) - pz * Math.cos(phi);
        py -= i * Math.sin(phi);
        pz += i * Math.cos(phi);
        
        var p:Number = 1 / Math.sqrt(px * px + py * py + pz * pz);
        px *= p;
        py *= p;
        pz *= p;
        
        if((x*py-y*px) > 0) {
            px*=-1;
            py*=-1;
            pz*=-1;
        }
        
        var r:Number = 130+Math.random() * Math.random()*130;
        var v:Number = Math.sqrt(r)*0.185;
        this.x = 232 + r * x;
        this.y = 200 + r * y;
        this.z = r * z;
        vx = px * v;
        vy = py * v;
        vz = pz * v;
        this.blendMode = "add";
    }
    public function update(p:Point):void {
        x += vx;
        y += vy;
        z += vz;
        if(!p) p = new Point(232, 200);
        var px:Number = x - p.x;
        var py:Number = y - p.y;
        var r:Number = 1000 / Math.pow(px*px+py*py+z*z, 1.5);
        vx -= px * r;
        vy -= py * r;
        vz -= z * r;
        if(x > 1465 || x < -1000) {
            init();
        }
    }
}