cesium的路径显示（label,billboard,czml路径）

实现功能：所经过游玩地点的标注，并通过线路动态显示游玩路线

var viewer = new Cesium.Viewer("cesiumContainer",{     baseLayerPicker:false,     imageryProvider:goo,     terrainProvider:new Cesium.createWorldTerrain()     });
//载入kml数据，并设置label及billboard样式
var kmlPromiese = new Cesium.KmlDataSource.load("./label.kml");
kmlPromiese.then(function(datasoruce){
    viewer.dataSources.add(datasoruce);
    var entities = datasoruce.entities.values;
    for (var i = 0; i < entities.length; i++) {
        var entity = entities[i];
        entity.billboard.show=true;
        //billboard广告牌的样式
        entity.billboard.image="./billboard.jpg";
        entity.billboard.scale=1.5;
        //原点相对于物体的垂直位置,有Top、Buttom、Baseline、Center,Api中有图例
        entity.billboard.verticalOrigin =Cesium.VerticalOrigin.CENTER;
        //广告牌可显示的距离范围
        entity.billboard.distanceDisplayCondition= new Cesium.DistanceDisplayCondition(0,10000);
        entity.label.show =true;
        //标签字体大小
        entity.label.font="30px";
        entity.label.showBackground=true;
        entity.label.backgroundColor =new Cesium.Color(1,0,0,0.5);
        entity.label.fillColor =new Cesium.Color(0,0,1,0.5);
        entity.label.outlineWidth=10;
        entity.label.outlineColor = new Cesium.Color(0,1,1,0.5);
        //entity的name即为点击entity弹出的infoxBox的标题
        entity.name="这是一个新项目";
        //位置,先求原始位置，cartesian比如(-2636040.9583333777, 4766650.9492283035, 3307150.865245503)
        var ent_cartesianPos = entity.position.getValue(Cesium.JulianDate.now());
        //笛卡尔三维转至地理坐标，Cartographic(longitude, latitude, height)，范围分布为弧度，弧度，米，height为above the ellipsoid
        //Cesium.Cartographic.fromCartesian(cartesian, ellipsoid, result),球体默认为 Ellipsoid.WGS84 
        //另一个常用方法Cesium.Cartographic.toCartesian(cartographic, ellipsoid, result)
        var entity_cartoPos = Cesium.Cartographic.fromCartesian(ent_cartesianPos);
        var longitute = Cesium.Math.toDegrees(entity_cartoPos.longitude).toFixed(3);
        var latitude = Cesium.Math.toDegrees(entity_cartoPos.latitude).toFixed(3);
        entity.name="白小宝旅游"+(i+1)+"处";
        entity.description= "坐标地理位置为："+"经度"+longitute+"度,纬度"+latitude+"度"+"；游玩内容描述待编写";
        //entity.description = "位置"+ent_cartesianPos;
        //alert(entity)   ; 
    }
});
//载入移动设施,czml本身加载并不难，难的是做出这个caml数据，初步理解这个数据里面有样式、经过地理位置的时间的地理位置（cartesian格式）
var dronePromise = new Cesium.CzmlDataSource.load('./Vehicle.czml');
dronePromise.then(function(dataSource) {
    viewer.dataSources.add(dataSource);
});
viewer.camera.flyTo(dronePromise);
样式做的丑O(∩_∩)O~