[AS3]AS3画正多边形源代码示例

调用方法：

import Polygon; //引用脚本 
var my_poly:Polygon=new Polygon(); //实例化一个多边形对象 
/* 
*drawPolygon(radius:int,segments:int,centerX:Number,
 centerY:Number,tint:uint,line:int,rotating:Number,fillColor:uint=0) 
*radius: 边长， px为单位，正整数， 
*segments：边的个数，正整数 
*centerX： 中心点x坐标 
*centerY： 中心点y坐标 
*tint： 边颜色， 16进制数字 例如：0xFF0000 红色 
*line： 边线宽度，px为单位 
*rotating: 多边形旋转角度， 
*fillColor： 填充颜色，16进制数字 不提供值时不填充。 
* 
*/ 
 
my_poly.drawPolygon(100,7,300,200,0xFF0000,1,0); 
//CuPlayer.com绘制一个无填充颜色的正七边形 
my_poly.drawPolygon(100,5,300,200,0xFF0000,1,0,0x00FF00); 
//CuPlayer.com绘制一个有填充颜色的正五边形 
addChild(my_poly); //将多边形对象添加到舞台 

package 
{ 
    import flash.display.MovieClip; 
    import flash.events.Event; 
 
    public class Polygon extends MovieClip 
    { 
        //CuPlayer.com PROPERTIES 
        private var points:Array; 
 
        private var id:int; 
        private var ratio:Number; 
        private var top:Number; 
 
        //CuPlayer.com CONSTRUCTOR 
        public function Polygon() 
        { 
            addEventListener(Event.ADDED_TO_STAGE,init); 
        } 
 
        private function init(evt:Event):void 
        { 
            removeEventListener(Event.ADDED_TO_STAGE,init); 
            stage.frameRate=30; 
        } 
 
        //CuPlayer.com METHODS 
        public function drawPolygon(radius:int,segments:int,
centerX:Number,centerY:Number,tint:uint,line:int,rotating:Number,fillColor:uint=0):void 
        { 
            id=0; 
            points=new Array(); 
            ratio=360/segments; 
            top=centerY-radius; 
            if(fillColor!=0) 
                graphics.beginFill(fillColor); 
            for(var i:int=rotating;i<=360+rotating;i+=ratio) 
            { 
                var xx:Number=centerX+Math.sin(radians(i))*radius; 
                var yy:Number=top+(radius-Math.cos(radians(i))*radius); 
                points[id]=new Array(xx,yy); 
                switch(id) 
                { 
                    case 0: 
                        break; 
                    case 1: 
                        graphics.lineStyle(line,tint,1); 
                        graphics.moveTo(points[id-1][0],points[id-1][1]); 
                        graphics.lineTo(points[id][0],points[id][1]); 
                        break; 
                    default: 
                    graphics.lineTo(points[id][0],points[id][1]); 
                    //drawing(points[id-1][0],points[id-1][1],points[id][0],points[id][1],tint,line); 
                } 
                id++; 
            } 
            if(fillColor!=0) 
                graphics.endFill(); 
            id=0; 
        } 
 
        private function radians(n:Number):Number 
        { 
            return(Math.PI/180*n); 
        } 
 
    } 
} 
//脚本代码结束