uzu　螺旋をグルグルとアニメーションで描いてみる練習

by enoeno 26 Apr 2009

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// forked from enoeno's uzu　螺旋をグルグルと描いてみる練習
package {
    import flash.display.*;
    import flash.events.*;
    import flash.utils.*;
    
    [SWF(backgroundColor = "0x000000")]
    public class FlashTest extends Sprite {
        
        private var container:Sprite;
        private var maxPoints:int = 10000;
        private var counter:int = 0;
        private var timer:Timer;
        private var points:Array = new Array();
	private var sp:Sprite;
        
        public function FlashTest() {
            // write as3 code here..
            init();
        }
        
        private function init():void{
            var pos:Number = 76;
            
            var centerX:Number = stage.stageWidth/2;
            var centerY:Number = stage.stageHeight/2;
            
            
            container = new Sprite();
            addChild(container);
            
            
            
            for(var i:Number = 0; i < pos*Math.PI; i += (Math.PI/180.0)){
                var obj:Object = new Object();
                obj.x = (Math.cos(i) + (i * Math.sin(i))) +centerX;
                obj.y = (Math.sin(i) + (i * Math.cos(i))) +centerY;
                points.push( obj );
            }
            
            timer = new Timer(10);
            timer.addEventListener(TimerEvent.TIMER, drawSpiral);
            timer.start();
        }
        
        private function drawSpiral( e:TimerEvent ):void {
                sp = new Sprite();
                sp.graphics.lineStyle(0, 0x5fef08, 85, false, "none", "round");
                sp.blendMode = BlendMode.ADD;

                if( counter < points.length ){
                    sp.graphics.moveTo( points[counter].x, points[counter].y );
                    if( counter > 0 ) sp.graphics.lineTo( points[counter-1].x, points[counter-1].y );
                    
                    container.addChild(sp);
                    counter ++;
                } else {
                    timer.stop();
                }

        }
    }
}