flash on 2010-3-7

by 084 08 Mar 2010

• Related works: 2
Embed

/**
 * Copyright 084 ( http://wonderfl.net/user/084 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/fCNH
 */

package {
import fl.transitions.easing.Back;
import flash.display.Sprite;
import flash.events.Event;
	public class Chain extends Sprite {
		private var balls:Array;
		private var numBalls:Number = 5;
		
		//private var ball0:Ball;
		//private var ball1:Ball;
		//private var ball2:Ball;
		
		private var spring:Number = 0.1;
		private var friction:Number = 0.8;
		private var gravity:Number = 5;
		
		public function Chain() {
			init();
		}
		private function init():void {
			balls = new Array();
			for (var i:uint = 0; i < numBalls; i++) {
				var ball:Ball = new Ball(20,Math.random()*0xff0000);
				addChild(ball);
				balls.push(ball);
			}
			//ball0 = new Ball(10);
			//addChild(ball0);
			//ball1 = new Ball(20);
			//addChild(ball1);
			//ball2 = new Ball(25);
			//addChild(ball2);
			
			addEventListener(Event.ENTER_FRAME, onEnterFrame);
		}
		
		private function onEnterFrame(event:Event):void {
			//moveBall(ball0, mouseX, mouseY);
			//moveBall(ball1, ball0.x, ball0.y);
			//moveBall(ball2, ball1.x, ball1.y);
			graphics.clear();
			graphics.lineStyle(1);
			graphics.moveTo(mouseX, mouseY);
			moveBall(balls[0], mouseX, mouseY);
			graphics.lineTo(balls[0].x, balls[0].y);
			
			for (var i:uint = 1; i < numBalls; i++) {
				var ballA:Ball = balls[i - 1];
				var ballB:Ball = balls[i];
				moveBall(ballB, ballA.x, ballA.y);
				graphics.lineTo(ballB.x, ballB.y);
			}
			//graphics.lineTo(ball0.x, ball0.y);
			//graphics.lineTo(ball1.x, ball1.y);
			//graphics.lineTo(ball2.x, ball2.y);
		}
		private function moveBall(ball:Ball, targetX:Number, targetY:Number):void {
			ball.vx += (targetX - ball.x) * spring;
			ball.vy += (targetY - ball.y) * spring;
			ball.vy += gravity;
			ball.vx *= friction;
			ball.vy *= friction; 
			ball.x += ball.vx;
			ball.y += ball.vy;
		}
	}
}
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 ):void {
			this.radius = radius;
			this.color = color;
		    init();
		}
		public function init():void {
			graphics.beginFill(color);
			graphics.drawCircle(0, 0, radius);
			graphics.endFill();
		}
	}