自己forkバネ運動基礎２α

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

// forked from ton_'s バネ運動基礎２　２軸＋マウス
package {
    import flash.display.Sprite;
    import flash.events.Event;
    public class FlashTest extends Sprite {
        private var ball:Array;        
        private var spring:Number = 0.02;
        //摩擦ありの場合
        private var friction:Number = 0.98;     
        //加速度と速度は配列にしないと
        private var vx:Array;
        private var vy:Array;
  
        public function FlashTest() {
            init();
        }
        public function init():void{
            graphics.lineStyle(1,0x000000);
            graphics.drawCircle(stage.stageWidth/2,stage.stageHeight/2,3);
        
            vx = new Array;
            vy = new Array;
            for(var i:int=0; i<4; i++){
                vx[i] = 0;
                vy[i] = 0;
            }
       
            
            ball = new Array();
            for(var i:int=0; i<4; i++){
                ball[i] = new Ball(20,0x00ff00+i*0x440044);
                ball[i].x=40+i*20;
                ball[i].y=40+i*20;
                addChild(ball[i]);
            }
            
            addEventListener(Event.ENTER_FRAME,oEF);            
        }
        private function oEF(e:Event):void{
            for(var i:int=0; i<4; i++){
            var ax:Number=(mouseX - ball[i].x)*(spring-i*0.001);
            vx[i] += ax;
            vx[i] *= friction;
            ball[i].x += vx[i];
            var ay:Number=(mouseY - ball[i].y)*(spring-i*0.001);
            vy[i] += ay;
            vy[i] *= friction;
            ball[i].y += vy[i];
            }
        }
    }
}

    import flash.display.Sprite;
    class Ball extends Sprite{
        public var radius:Number;
        public var color:uint;
        public var vx:Number =0;
        public var vy:Number =0;
        
        public function Ball(radius:Number = 40,color:uint = 0xff0000){
            this.radius = radius;
            this.color = color;
            init();
        }
        public function init():void{
            graphics.beginFill(color);
            graphics.drawCircle(0,0,radius);
            graphics.endFill();
        }
    }