text: 
          function startup(Cesium) {
              var pointData = [
                  [31.0840587516, 121.5301772615],
                  [31.0842907516, 121.5307252615],
                  [31.0847737516, 121.5305362615]
              ];
  
              var modelUrl = './SampleData/models/CesiumMilkTruck/CesiumMilkTruck.glb';
  
              var tilesUrl = 'http://localhost:8081/static/tiles/unistrong/tileset.json';
  
              var viewer = initView('cesiumContainer');
              var scene = viewer.scene;
              var clock = viewer.clock;
              var model = addModel(viewer, modelUrl, pointData[0]);
  
              var tiles = addTiles(viewer, tilesUrl);
  
              var cartoScratch = new Cesium.Cartographic.fromDegrees(pointData[0][1], pointData[0][0]);
  
              function start() {
                
                  // scene.postRender.addEventListener(function () {
                  //     var position = model.position.getValue(clock.currentTime);
                  //     model.position = scene.clampToHeight(position, objectsToExclude);
                  // });
              }
  
            
              function addTiles(viewer, url) {
                  var tileset = new Cesium.Cesium3DTileset({
                      url: url
                  });
                  scene.primitives.add(tileset);
                  viewer.zoomTo(tileset);
                  return tileset;
              }
  
             
          }