/* * @Author: cbwu 504-wuchengbo@htsdfp.com * @Date: 2024-03-13 09:32:21 * @LastEditors: cbwu * @LastEditTime: 2024-04-02 13:49:26 * @Description: */ // Viewer初始化 import { Viewer, TileMapServiceImageryProvider, ImageryLayer, RequestScheduler, SceneMode, buildModuleUrl, ScreenSpaceEventType, } from 'cesium' //离线地球底图 const earth_native = TileMapServiceImageryProvider.fromUrl( // 'node_modules/cesium/Build/CesiumUnminified/Assets/Textures/NaturalEarthII', buildModuleUrl('Assets/Textures/NaturalEarthII'), ) /** * Viewer初始化 * @param container :id或HTML对象 * @returns :viewer对象 */ function initViewer(container: string | Element): Viewer { //未联网状态加载默认本地底图,保证地球有底图显示 const viewer = new Viewer(container as HTMLElement, { infoBox: false, //是否显示点击要素之后显示的信息 homeButton: false, //是否显示Home按钮 navigationHelpButton: false, //是否显示帮助信息控件 timeline: false, //是否显示时间线控件 animation: false, //是否显示动画控件 sceneModePicker: true, //是否显示投影方式控件 sceneMode: SceneMode.SCENE3D, //设置场景模式,3D球体 // terrain: Cesium.Terrain.fromWorldTerrain(), baseLayerPicker: false, //是否显示图层选择控件 requestRenderMode: true, //启用请求渲染模式 scene3DOnly: false, //每个几何实例将只能以3D渲染以节省GPU内存 fullscreenButton: false, //右下角 全屏控件 orderIndependentTranslucency: false, contextOptions: { webgl: { alpha: true } }, maximumRenderTimeChange: Infinity, // 无操作时自动渲染帧率,设为数字会消耗性能,Infinity为无操作不渲染 // mapProjection: new Cesium.WebMercatorProjection(), baseLayer: ImageryLayer.fromProviderAsync(earth_native, {}), }) //去除cesium logo,隐藏版本信息 const creditContainer = viewer.cesiumWidget.creditContainer as HTMLDivElement creditContainer.style.display = 'none' // 开启深度检测 viewer.scene.globe.depthTestAgainstTerrain = true // 水雾特效 viewer.scene.globe.showGroundAtmosphere = true // 设置更高的缩放惯性以使缩放操作更平滑 viewer.scene.screenSpaceCameraController.inertiaZoom = 0.9 // 限制相机缩放 viewer.scene.screenSpaceCameraController.minimumZoomDistance = 200 //相机的高度的最小值 viewer.scene.screenSpaceCameraController.maximumZoomDistance = 20000000 //相机高度的最大值 // 去掉entity的点击事件(双击、单击) viewer.cesiumWidget.screenSpaceEventHandler.removeInputAction( ScreenSpaceEventType.LEFT_DOUBLE_CLICK, ) viewer.cesiumWidget.screenSpaceEventHandler.removeInputAction( ScreenSpaceEventType.LEFT_CLICK, ) return viewer } /** * 性能优化 * @param viewer :场景Viewer */ function perfViewer(viewer: Viewer) { // 抗锯齿 // 是否支持图像渲染像素化处理 // if (Cesium.FeatureDetection.supportsImageRenderingPixelated()) { // viewer.resolutionScale = window.devicePixelRatio // } viewer.scene.postProcessStages.fxaa.enabled = true // 关闭太阳,月亮,天空盒,雾等相关特效 viewer.scene.moon.show = false viewer.scene.fog.enabled = false viewer.scene.sun.show = false viewer.scene.skyBox.show = false // 优化加载WMTS图层速度 RequestScheduler.maximumRequestsPerServer = 18 // 设置cesium请求调度器的最大并发数量 RequestScheduler.throttleRequests = false //关闭请求调度器的请求节流 } export { initViewer, perfViewer }