百度地图获取导航路线数组

var p1 =new BMapGL.Point(115.998104,29.574345)
        var p2 =new BMapGL.Point(115.983762,29.56479)
          var driving = new BMapGL.DrivingRoute(that.map);
driving.search(p1, p2);                 //第一个驾车搜索
driving.search(P2, p3);                 //第二个驾车搜索
driving.setSearchCompleteCallback(function(){
        var pts = driving.getResults().getPlan(0).getRoute(0).getPath();    //通过驾车实例，获得一系列点的数组
        var polyline = new BMap.Polyline(pts);     
        map.addOverlay(polyline);
})