sampleupcast.as

《Flash AS3殿堂之路》光盘源码 学习ActionScript 3.0

package org.kingda.book.basicoop.polymorphism
{
	import flash.display.Sprite;
	import flash.display.Stage;

	public class SampleUpcast extends Sprite
	{
		public function SampleUpcast() {
			//生成50个形状
			for (var i:int = 0; i<50; i++) {
				//生成一个随机数Math.random()
				//大于0.5,则生成一个Circle对象传给ramdomShape()
				//否则，生成一个Rect对象传给ramdomShape()
				if (Math.random()> 0.5) {
					randomShape(new Circle(this));
				}else {
					randomShape(new Rect(this));
				}
			}	
		}
		//只接受KingdaShape类的对象。并在舞台上将传入的对象随机摆放
		private function randomShape(target:KingdaShape):void {
			//生成随机的颜色值
			var rand:uint = Math.random()* 0xFFFFFF;
			//生成随机的x,y 坐标
			var posX:Number = stage.stageWidth * Math.random();
			var posY:Number = stage.stageHeight * Math.random();
			target.fill(rand);
			target.move(posX, posY);
		}
	}
}