flash on 2010-5-19

//////////////////////////////////////////////////////////////////////////////
[AS3.0] ドットの光 (6)
http://www.project-nya.jp/modules/weblog/details.php?blog_id=1095
//////////////////////////////////////////////////////////////////////////////

by Geo877 11 Aug 2011

Embed

/**
 * Copyright Geo877 ( http://wonderfl.net/user/Geo877 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/lW3G
 */

// forked from ProjectNya's DotLight [Red]
////////////////////////////////////////////////////////////////////////////////
// [AS3.0] ドットの光 (6)
// http://www.project-nya.jp/modules/weblog/details.php?blog_id=1095
////////////////////////////////////////////////////////////////////////////////

package {

    import flash.display.Sprite;
    import flash.display.MovieClip;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    

    [SWF(backgroundColor="#000000", width="465", height="465", frameRate="30")]

    import flash.display.BitmapData;
    import flash.ui.Mouse;
    import flash.events.Event;
    public class Main extends Sprite {
        public var grph:BitmapData;
        public var grphDisplay:Bitmap;
                public var pointsArrayX:Array;
                public var pointsArrayY:Array;
                public var gfx:MovieClip;
        public function Main() {
            pointsArrayX = new Array();
            pointsArrayY = new Array();
            
            grph = new BitmapData(465,465,false,0xFFFFFFFF);
            grphDisplay = new Bitmap(grph);
            addChild(grphDisplay);
            
            gfx = new MovieClip();
            addChild(gfx);
            
            addEventListener(Event.ENTER_FRAME,mainLoop);
        }
        
        public var a:Number = 0;
        public var b:Number = 0;
        public var p:Number = 0.21;
        public var q:Number = 0.41;
        public var largest_d:Number = 0;

        public function iterate():void{
            //a|n+1 = a|n * b|n +p
            //b|n+1 = 2a|n * (b|n - 2) +p
            var a_n:Number = a;var b_n:Number = b;
            a = a_n*b_n + p;
            b = 2*a_n*(b_n-2) + q;
            var d:Number = Math.sqrt(a*a+b*b);
            if(d>largest_d)largest_d = d; 
            pointsArrayX.push(a);
            pointsArrayY.push(b);
        }
        
        public function mainLoop(e:Event = null):void{
                grph.fillRect(grph.rect,0xFFFFFF);
            var i:Number = 0;
            while(i<500){
                iterate();
                i++;
            }
            
            plot();
            p+=0.001;
            a = 0;
            b = 0;
            largest_d = 0;
            pointsArrayX = [];
            pointsArrayY = [];
        
            
        }
        
        public function plot():void{
                xp = grph.width/2 - 0;
                yp = grph.width/2 - 0;
                grph.setPixel(xp,yp,0xFF0000);
                grph.setPixel(xp,yp-1,0xFF0000);
                grph.setPixel(xp,yp+1,0xFF0000);
                grph.setPixel(xp,yp-2,0xFF0000);
                grph.setPixel(xp,yp+2,0xFF0000);
                grph.setPixel(xp,yp-3,0xFF0000);
                grph.setPixel(xp,yp+3,0xFF0000);
                grph.setPixel(xp-1,yp,0xFF0000);
                grph.setPixel(xp+1,yp,0xFF0000);
            gfx.graphics.clear();
            gfx.graphics.lineStyle(1,0x000000,0.3);
            gfx.graphics.moveTo(xp,yp);
            gfx.graphics.lineTo(0,yp);
            gfx.graphics.moveTo(xp,yp);
            gfx.graphics.lineTo(xp,0);
            gfx.graphics.moveTo(xp,yp);
            gfx.graphics.lineTo(xp*2,yp);
            gfx.graphics.moveTo(xp,yp);
            gfx.graphics.lineTo(xp,yp*2);
            gfx.graphics.lineStyle(1,0xAA1111,0.3);
            
            var r:Number = Math.sqrt((grph.width/2)*(grph.width/2)+(grph.height/2)*(grph.height/2))/largest_d;
            var i:Number = pointsArrayX.length-1;
            while(i>=0){
                var xp:Number = pointsArrayX[i];
                var yp:Number = pointsArrayY[i];
                xp*=r/1.5;
                yp*=r/1.5;
                xp = grph.width/2 - xp;
                yp = grph.height/2 - yp;
                
                if(i==pointsArrayX.length-1){
                    gfx.graphics.moveTo(xp,yp);
                }else{
                    gfx.graphics.lineTo(xp,yp);
                }
                grph.setPixel(xp,yp,0x000000);
                grph.setPixel(xp,yp-1,0x000000);
                grph.setPixel(xp,yp+1,0x000000);
                grph.setPixel(xp-1,yp,0x000000);
                grph.setPixel(xp+1,yp,0x000000);
                i--;
            }
        }

    }
}