   }
            },
            methods: {
                setPositionWithCurrentCamera() {
                    this._viewshed && this._viewshed.setPositionWithCurrentCamera();
                }
            }
        }

        // 2 创建vue程序
        // XE.ready()用来加载Cesium.js等相关资源
        XE.ready().then(() => {
            var app = new Vue({
                el: '#vueApp',
                components: {
                    EarthComp,
                },
            });
        });
  