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package
{
//ÐÇÐÎÏ߶¯»
// x=a*cos3A
// y=a*sin3A
// дÓÚ2010Äê4ÔÂ11ÈÕ
import flash.display.Sprite;
import flash.events.*;
public class Main extends Sprite
{
private var pen:Sprite=new Sprite();
private var lineMc:Sprite=new Sprite();
private var angle:int=-1;//½Ç¶È
private var centerX:Number=stage.stageWidth/2;//ÖÐÐĵãxλÖÃ
private var centerY:Number=stage.stageHeight/2;//ÖÐÐĵãyλÖÃ
public function Main()
{
init();
}
private function init():void
{
addChild(pen);
addChild(lineMc);
//Ãè»æÊ®×Ö×ø±ê
pen.graphics.lineStyle(1);
pen.graphics.moveTo(centerX,centerY);
pen.graphics.lineTo(centerX,0);
pen.graphics.moveTo(centerX,centerY);
pen.graphics.lineTo(centerX*2,centerY);
pen.graphics.moveTo(centerX,centerY);
pen.graphics.lineTo(centerX,centerY*2);
pen.graphics.moveTo(centerX,centerY);
pen.graphics.lineTo(0,centerY);
addEventListener(Event.ENTER_FRAME,Run);
}
private function Run(event:Event):void
{
lineMc.graphics.clear();
if (angle==-1)
{
var px:Number=centerX+200*Math.pow(Math.cos(angl
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