AS3 画扇形函数。下面示例中的DrawSector(moviec,200,200,100,S_angle,270,0xffcc00)函数就是画扇形的函数
AS3 画扇形函数。
下面示例中的
DrawSector(moviec,200,200,100,S_angle,270,0xffcc00);
函数就是画扇形的函数，
moviec是扇形所在影片剪辑的名字
第2，3个参数是扇形原点的横纵坐标
第4个参数是扇形的半径
第5个参数S_angle是扇形的角度
第6个参数是扇形的起始角度
第7个参数0xffcc00是扇形的颜色
<!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />-->/*
*Create?by?Geordi?14th?Feb?2008
*function?DrawSector?is?drawing?a?sector?in?the?flash?by?actionscript?3?
*/
import?flash.display.MovieClip;
import?flash.display.Sprite;
var?stag:Sprite=new?Sprite();
addChild(stag);
var?moviec:MovieClip=new?MovieClip;
stag.addChild(moviec);
var?S_angle:int=60;
/*?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?
*/
DrawSector(moviec,200,200,100,S_angle,270,0xffcc00);
/*
*?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
*/
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.beginFill(color,50);
????//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.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.
}
