Forked from:: naonya3's 単振動あそび2

forked from: 単振動あそび2

パラメータいじるだけで色んなそれっぽい図がかけます。
単振動って何なのよ。というテスト

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license : All rights reserved
modified : 2009-05-07 17:38:35

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// forked from ledmosquito's 単振動あそび2
// forked from ledmosquito's 単振動あそび1
// パラメータいじるだけで色んなそれっぽい図がかけます。
//単振動って何なのよ。というテスト
package  {
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.filters.BlurFilter;
	import flash.filters.ColorMatrixFilter;
	import flash.geom.ColorTransform;
	import flash.geom.Point;

[SWF(backgroundColor=0x000000)]
	public class Tanshindo extends Sprite{
		private var sprite:Sprite;
		private var sprite2:Sprite;
		private var spring:Springs;
		private var spring2:Springs;
		private var bitmap:Bitmap;
		private var colorTr:ColorTransform;
		public function Tanshindo() {
    
                        stage.width
			sprite = new Sprite();
			sprite.graphics.beginFill(0xffffff,1);
			sprite.graphics.drawCircle(0, 0, 1);
			sprite.x = 100;
			sprite.y = 100;
			
			sprite2 = new Sprite();
			sprite2.addChild(sprite);
			
			spring = new Springs();
			spring.fc = 0.999;
			spring.k = 0.8;
			spring2 = new Springs();
			spring2.fc = 0.9996;
			spring2.k = 0.8;

bitmap = new Bitmap(new BitmapData(stage.stageWidth, stage.stageHeight,true,0x000000));
			addChild(bitmap);
			addEventListener('enterFrame', loop);
		}
		
		private function loop(e:Event):void {
			for (var i:Number = 0; i < 20; i++ ) {
				sprite.x = spring.run() * stage.stageWidth/2 + stage.stageWidth/2;
				sprite.y = spring2.run() * stage.stageHeight/2 + stage.stageHeight/2;
				bitmap.bitmapData.draw(sprite2);
			}
                        //bitmap.bitmapData.applyFilter(bitmap.bitmapData, bitmap.getRect(bitmap) , new Point(), new BlurFilter(1.05,1.05));
		}
		
	}
	
}

/**
	 * ばね運動
	 * @author Naoto Horiguchi<'horiguchi-naoto@kayac.com'>
	 */
     class Springs {
		
		//ふり幅
		private var _f:Number = 5;
		//バネの長さ
		private var _v:Number = 0;
		//バネ定数
		private var _k:Number = 10;
		//摩擦力
		private var _fc:Number = 1;
		
		public function Springs() {
			
		}
		
		public function run():Number {
			_v -= _k * _f;
			_f += _v;
			_f *= _fc;
			return _f;
		}
		
		/**
		 *  バネ定数
		 */
		public function set k(value:Number):void {
			_k = value;
		}
		
		/**
		 * 摩擦
		 */
		public function set fc(value:Number):void {
			_fc = value;
		}
	}

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