画图（扇形）

private function init():void
{
//popSip.setTitle(images);
var stag:UIComponent=new UIComponent();
testCanvas.addChild(stag);
var moviec:MovieClip=new MovieClip;
moviec.graphics
stag.addChild(moviec);

DrawSector(moviec,100,100,100,S_angle,0,0xffcc00);
timer=new Timer(1000,0);
timer.start();
timer.addEventListener(TimerEvent.TIMER,setMoveC);
}
private var timer:Timer;
private var S_angle:int=360;
private function setMoveC(event:TimerEvent):void
{
S_angle--;
var uiC:UIComponent=testCanvas.getChildAt(0) as UIComponent;
var  moviec:MovieClip=uiC.getChildAt(0) as MovieClip;
DrawSector(moviec,100,100,100,S_angle,0,0xffcc00);
/* S_angle is expressed as a number between 0 and 360 degrees. it will draw a 60
* degree sector in this example, but you could change it to what ever you want
*/

/*
* mc the movieclip: the container of the sector.
* x,y the center position of the sector
* r the radius of the sector
* angle the angle of the sector
* startFrom the start degree counting point : 270 top, 180 left, 0 right, 90 bottom ,
* it is counting from top in this example.
* color the fil lin color of the sector
*/
}
















private function DrawSector(mc:MovieClip,x:Number=200,y:Number=200,r:Number=100,angle:Number=27,startFrom:Number=270,color:Number=0xff0000):void {
    mc.graphics.clear();
    mc.graphics.beginFill(color,0.5);
    //remove this line to unfill the sector
    /* the border of the secetor with color 0xff0000 (red) , you could replace it with any color
    * you want like 0x00ff00(green) or 0x0000ff (blue).
    */
   // mc.graphics.
    mc.graphics.lineStyle(0,0xff0000);
    mc.graphics.moveTo(x,y);
    angle=(Math.abs(angle)>360)?360:angle;
    var n:Number=Math.ceil(Math.abs(angle)/45);
    var angleA:Number=angle/n;
    angleA=angleA*Math.PI/180;
    startFrom=startFrom*Math.PI/180;
    mc.graphics.lineTo(x+r*Math.cos(startFrom),y+r*Math.sin(startFrom));
    for (var i=1; i<=n; i++) {
        startFrom+=angleA;
        var angleMid=startFrom-angleA/2;
        var bx=x+r/Math.cos(angleA/2)*Math.cos(angleMid);
        var by=y+r/Math.cos(angleA/2)*Math.sin(angleMid);
        var cx=x+r*Math.cos(startFrom);
        var cy=y+r*Math.sin(startFrom);
        mc.graphics.curveTo(bx,by,cx,cy);
    }
    if (angle!=360) {
        mc.graphics.lineTo(x,y);
    }
    mc.graphics.endFill();// if you want a sector without filling color , please remove this line.
}