import * as mars3d from "mars3d"
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export let map // mars3d.Map三维地图对象
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let tiles3dLayer
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export const eventTarget = new mars3d.BaseClass() // 事件对象，用于抛出事件到面板中
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// 需要覆盖config.json中地图属性参数（当前示例框架中自动处理合并）
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export const mapOptions = function (option) {
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option = {
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scene: {
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center: { lat: 33.597401, lng: 119.031399, alt: 514, heading: 0, pitch: -46 },
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showSun: false,
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showMoon: false,
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showSkyBox: false,
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showSkyAtmosphere: false,
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fog: false,
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backgroundColor: "rgba(0,0,0,0)",
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orderIndependentTranslucency: false,
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contextOptions: { webgl: { alpha: true } }, // 允许透明
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globe: {
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show: false, // 不显示地球
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showGroundAtmosphere: false,
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enableLighting: false
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},
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cameraController: {
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zoomFactor: 1.5,
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minimumZoomDistance: 0.1,
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maximumZoomDistance: 200000,
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enableCollisionDetection: false
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}
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},
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control: {
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baseLayerPicker: false,
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sceneModePicker: false,
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locationBar: {
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fps: true,
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template: "<div>经度:{lng}</div> <div>纬度:{lat}</div><div>方向：{heading}°</div> <div>俯仰角：{pitch}°</div>"
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}
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}
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}
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delete option.terrain
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delete option.basemaps
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delete option.layers
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return option
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}
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/**
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* 初始化地图业务，生命周期钩子函数（必须）
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* 框架在地图初始化完成后自动调用该函数
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* @param {mars3d.Map} mapInstance 地图对象
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* @returns {void} 无
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*/
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export function onMounted(mapInstance) {
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map = mapInstance // 记录map
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const a = document.getElementsByClassName("mars3d-container")[0]
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a.style.backgroundImage = "url(/img/tietu/backGroundImg.jpg)"
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a.style.backgroundRepeat = "no-repeat"
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a.style.backgroundSize = "100% 100%"
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}
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/**
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* 释放当前地图业务的生命周期函数
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* @returns {void} 无
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*/
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export function onUnmounted() {
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map = null
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}
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function removeLayer() {
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if (tiles3dLayer) {
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map.removeLayer(tiles3dLayer, true)
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tiles3dLayer = null
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}
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}
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// 当前页面业务相关
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export function showModel(_url) {
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removeLayer()
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if (!_url) {
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return
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}
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tiles3dLayer = new mars3d.layer.TilesetLayer({
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url: _url,
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maximumScreenSpaceError: 1,
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flyTo: true
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})
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map.addLayer(tiles3dLayer)
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// 单击事件
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tiles3dLayer.on(mars3d.EventType.load, function (event) {
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console.log("模型加载完成", event)
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// 限定缩放级别
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map.scene.screenSpaceCameraController.maximumZoomDistance = tiles3dLayer.boundingSphere.radius * 5
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// 模型不可以拖拽移动位置，可放大缩小，旋转
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// const center = tiles3dLayer.center.toCartesian()
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// const offset = new Cesium.HeadingPitchRange(0, 0, tiles3dLayer.boundingSphere.radius)
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// map.camera.lookAt(center, offset)
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// 自动贴地处理
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tiles3dLayer.clampToGround(10)
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})
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}
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export function flyTo() {
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tiles3dLayer.flyTo()
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}
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