先获取Polyline最中间的path,然后再得到这个path的中间点作为整个Polyline的中点
private function getCenter(pl:Polyline):MapPoint{ var pathCount:Number=pl.paths.length; var pathIndex:int=int((pathCount / 2) - 1); var midPath:Array=pl.paths[pathIndex]; var ptCount:Number=midPath.length; var ptIndex:int=int((ptCount / 2) - 1); var pt:MapPoint=pl.getPoint(pathIndex, ptIndex); return pt; }
求线段的起点和终点:
var xx:int=LuduanList.selectedIndex; var myGraphic:Graphic=GraphicArr[xx]; var l:Polyline=myGraphic.geometry as Polyline; var goldPath:Array=l.paths[l.paths.length-1]; var spt:MapPoint=l.getPoint(0,0); var mpt:MapPoint=l.getPoint(l.paths.length-1,goldPath.length-1);