龙的传人

自定义星形类

as3代码如下：
package {
 import flash.display.Sprite;
 import flash.display.Graphics;
 public class Star extends Sprite {
  private var RR:Number;
  private var rr:Number;
  private var num:int;
  private var xx:Number;
  private var yy:Number;
  private var lineColor:uint;
  private var fillBl:Boolean;
  private var fillColor:uint;
  private var bl:Boolean=false;

  public function Star(num:int=5,R:Number=50,r:Number=20,lineColor:uint=0xff0000,

fillBl:Boolean=false,fillColor:uint=0xff0000) {
   if (num<=1) {
    trace(“星形类的第一个参数至少为2″);
    return;
   }
   this.num=num;
   this.RR=R;
   this.rr=r;
   this.lineColor=lineColor;
   this.fillBl=fillBl;
   this.fillColor=fillColor;
   init();
  }
  private function init() {
   this.graphics.lineStyle(1,lineColor);
   fillBl==true?this.graphics.beginFill(this.fillColor):0;
   //当fillBl为true时,有填充色
   this.graphics.moveTo(rr,0);
   for (var i:int=1; i<=(num*2); i++) {
    bl==false?[xx=RR*Math.cos(i*Math.PI*2/(num*2)),yy=RR*Math.sin(i*Math.PI*2/(num*2))]:[xx=rr*Math.cos(i*Math.PI*2/(num*2)),yy=rr*Math.sin(i*Math.PI*2/(num*2))];
    this.graphics.lineTo(xx,yy);
    bl=! bl;
   }
   this.num%2!=0?this.rotation=90:0;//如果星形数是单的,则让其正放,+90度
  }
 }
}