cesium 設置地球默認區域爲中國 一鍵返回默認區域

直接上代碼啦

Cesium.Camera.DEFAULT_VIEW_RECTANGLE = Cesium.Rectangle.fromDegrees(90, -20, 110, 90);
const viewer = new Cesium.Viewer('cesiumContainer', {
selectionIndicator: false,
  infoBox: false,
  animation: false,
  baseLayerPicker: false,
  timeline: false,
  geocoder: false,
  homeButton: false,
  sceneModePicker: false,
  navigationHelpButton: false,
  orderIndependentTranslucency: false,
  contextOptions: {
    webgl: {
      alpha: true,
      preserveDrawingBuffer: true
    }
  },
  imageryProvider: new Cesium.UrlTemplateImageryProvider({
    url: '//www.google.cn/maps/vt?lyrs=s@726&x={x}&y={y}&z={z}',
    enablePickFeatures: false,
    maximumLevel: 20
  })
});

一鍵返回，官方文檔

viewer.camera.flyHome(2);