加载3dTiles，gltf模型

转载自：https://blog.youkuaiyun.com/weixin_43371136/article/details/116452187

加载3dTiles

自己服务器发布的数据

var palaceTileset = new Cesium.Cesium3DTileset({
        url: cesiumDomain + "/sample3D/tileset.json",  
      });
      viewer.scene.primitives.add(palaceTileset);
      palaceTileset.readyPromise.then((currentModel) => {
        viewer.zoomTo(currentModel);
      });

加载cesium账户上自己发布的数据

var tileset = new Cesium.Cesium3DTileset({
        url: Cesium.IonResource.fromAssetId(454231),
      });

      viewer.scene.primitives.add(tileset);
      viewer.zoomTo(tileset);

点击显示经纬度

var handler = new Cesium.ScreenSpaceEventHandler(
       viewer.scene.canvas
      );
      handler.setInputAction((event) => {
        var earthPosition = viewer.camera.pickEllipsoid(
          event.position,
          CesiumUtil.CesiumViewer.scene.globe.ellipsoid
        );
        if (earthPosition) {
          var cartographic = viewer.scene.globe.ellipsoid.cartesianToCartographic(
            earthPosition
          );
          var log_String = Cesium.Math.toDegrees(
            cartographic.longitude
          ).toFixed(4);
          var lat_String = Cesium.Math.toDegrees(cartographic.latitude).toFixed(
            4
          );
          console.log(log_String, lat_String);
        }
      }, Cesium.ScreenSpaceEventType.LEFT_CLICK);

添加gltf

1. 第一种

var scene = viewer.scene;
      let height = 15;
      var modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(
        Cesium.Cartesian3.fromDegrees(118.7751, 32.0675, height)
      ); //gltf数据加载位置
      var buildingGIFT = scene.primitives.add(
        Cesium.Model.fromGltf({
          url: cesiumDomain + "gltf/school1.gltf", //如果为bgltf则为.bgltf
          modelMatrix: modelMatrix,
          scale: 5.0, //放大倍数
          color: Cesium.Color.LIME,
        })
      );
      //这里坐标值和范围要对，不然加载出来找不到地方
      viewer.camera.setView({
        destination: Cesium.Rectangle.fromDegrees(
          118.7751,
          32.0675,
          118.975275,
          31.943535
        ),
        orientation: {
          heading: Cesium.Math.toRadians(45), // east, default value is 0.0 (north)
          pitch: Cesium.Math.toRadians(-45), // 向下45度
          roll: 0.0, // default value
        },
      });

2. 第二种 以entities的方式加载gltf

var position = Cesium.Cartesian3.fromDegrees(118.802266, 32.059887, 6.0);
      var heading = Cesium.Math.toRadians(45);
      var pitch = 0;
      var roll = 0;
      var hpr = new Cesium.HeadingPitchRoll(heading, pitch, roll);
      var orientation = Cesium.Transforms.headingPitchRollQuaternion(
        position,
        hpr
      );
      var model_entity = viewer.entities.add({
        id: "build",
        position: position,
        orientation: orientation,
        model: {
          show: true,
          uri: cesiumDomain + "gltf/Huahailu.gltf",//注意是uri 不是url
        },
      });
      viewer.zoomTo(model_entity);