フィボナッチ数列をlineToで結んでみた

by yamadori 17 Dec 2010
Tags

math pigreco
Embed
/**
 * Copyright yamadori ( http://wonderfl.net/user/yamadori )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/jg9n
 */

/*
 *フィボナッチ数列をlineToで結んでみました。
 */
// forked from _azzip's フィボナッチの勉強
/*
 * フィボナッチの勉強
 * 
 * 数値の変化でどんな感じになるのか見たかったです。
 * 
 * ところどころなんか可愛い動きがあってかわいいですｗｗ
 * 
 */
package
{
    import flash.display.Sprite;
    import flash.filters.GlowFilter;
    import flash.events.Event;
    import flash.text.*;
    import flash.display.Shape;
    import flash.display.BitmapData;
    import flash.display.Bitmap;
    import flash.geom.ColorTransform;
    import frocessing.color.ColorHSV;
    
    [SWF(backgroundColor="#000000", width="465", height="465", frameRate="30")]
    
    public class Main extends Sprite
    {
        private var particles:Array = [];
        private var angles:Array = new Array();
        private var angle:Number;
        private var count:Number = 2;
        private var totalNum:int = 200;    
        private var tf:TextField;
        
        private var shape:Shape;
        private var bd:BitmapData;
        private var ct:ColorTransform;
        private var color:ColorHSV
        
        private var glow:GlowFilter;
        
        public function Main()
        {
            shape = new Shape();
            bd = new BitmapData(stage.stageWidth, stage.stageHeight, false, 0x0);
            addChild(new Bitmap(bd));
            ct = new ColorTransform(0.7, 0.7, 0.7);
                
            tf = new TextField();
            var tfmt:TextFormat = new TextFormat("ARIAL",null,0xFFFFFF);
            tf.defaultTextFormat = tfmt;
            tf.x = 0;
            tf.y = 0;
            addChild(tf);
            
            color = new ColorHSV();
            shape.graphics.lineStyle(1,color.value);
            
            for(var i:int =0; i<totalNum; i++)
            {
                angle = i * Math.PI * count * ((1 + Math.sqrt(5))/2);
                angles.push(angle);
                
                var p:Particle = new Particle();
                particles.push(p);
                
                particles[i].x = stage.stageWidth/2 + (i+1) * Math.cos(angles[i]); 
                particles[i].y = stage.stageHeight/2 + (i+1) * Math.sin(angles[i]); 
                
                if(i != 0)
                {
                    if(i == 1) shape.graphics.moveTo(particles[i-1].x, particles[i-1].y);
                    else shape.graphics.lineTo(particles[i-1].x, particles[i-1].y);
                    
                    shape.graphics.lineTo(particles[i].x, particles[i].y);
                }
                /*
                if(i >= 4)
                {
                    shape.graphics.moveTo(particles[i-4].x, particles[i-4].y);
                    shape.graphics.lineTo(particles[i].x, particles[i].y);
                }
                */
            }
            bd.draw(shape);
            
            addEventListener(Event.ENTER_FRAME,enterHandler);            
        }


        private function enterHandler(e:Event):void
        {
            color.h += 1;
            shape.graphics.clear();
            shape.graphics.lineStyle(1, color.value);
            
            count += 0.04;
            tf.text = "π: " + String(Math.floor(count));
            for(var i:int =0; i<totalNum; i++)
            {
                angles[i] = i * Math.PI * Math.floor(count) * ((1 + Math.sqrt(5))/2);
                particles[i].x += ((stage.stageWidth/2 + (i+1) * Math.cos(angles[i])) - particles[i].x)/5;
                particles[i].y += ((stage.stageHeight/2 + (i+1) * Math.sin(angles[i])) - particles[i].y)/5;
                
                if(i != 0)
                {
                    if(i == 1) shape.graphics.moveTo(particles[i-1].x, particles[i-1].y);
                    else shape.graphics.lineTo(particles[i-1].x, particles[i-1].y);
                    
                    shape.graphics.lineTo(particles[i].x, particles[i].y);
                }
                /*
                if(i >= 4)
                {
                    graphics.moveTo(particles[i-4].x, particles[i-4].y);
                    graphics.lineTo(particles[i].x, particles[i].y);
                }
                */
            }   
            //bd.fillRect(bd.rect, 0x0);
            bd.colorTransform(bd.rect, ct);
            bd.draw(shape);
        }        
    }
}
class Particle
{
    public var x:Number;
    public var y:Number;
    
    function Paticle()
    {
        
    }
}