利用滤镜画一条路
路。先画一圈线，然后添加滤镜。
var vec:Vector.Vector.<Point>=new Vector.<Point>();
var lines:Sprite=new Sprite();
var i:int;
for (i = 0; i < 20; i ++)
{
var radius:Number = (i <= 2 || i == 19)? 50*2 : ((Math.random() * 25 + 50)*2);
vec.push(new Point(Math.cos(Math.PI * i / 10) * radius, Math.sin(Math.PI * i / 10) * radius));
}
lines.graphics.lineStyle(2, 0xFFFFFF, 1);
lines.graphics.moveTo(vec[0].x,vec[0].y);
for(i=1;i<vec.length;i++){
lines.graphics.lineTo(vec[i].x,vec[i].y);
}
lines.graphics.lineTo(vec[0].x,vec[0].y);
lines.filters = [new GlowFilter(0x4A4A4A, 1, 20, 20, 100, 2), new GlowFilter(0xD9C364, 1, 15, 15, 3, 2),new GlowFilter(0x53BA37, 1, 50, 50, 3, 2)];
addChild(lines);
lines.x=lines.y=200;