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 routeLayer // 矢量数据图层
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let gaodeRoute // 高德 路径规划
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// 当前页面业务相关
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let startGraphic, endGraphic
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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 = {
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scene: {
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center: { lat: 31.797919, lng: 117.281329, alt: 36236, heading: 358, pitch: -81 }
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}
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}
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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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/**
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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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// 创建矢量数据图层
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routeLayer = new mars3d.layer.GraphicLayer()
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map.addLayer(routeLayer)
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gaodeRoute = new mars3d.query.GaodeRoute({})
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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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// 开始分析按钮
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export function btnAnalyse(type) {
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if (!startGraphic || !endGraphic) {
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globalMsg("请设置起点和终点")
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return
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}
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queryRoute(type)
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}
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// 清除按钮
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export function removeAll() {
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if (startGraphic) {
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startGraphic.remove()
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startGraphic = null
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}
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if (endGraphic) {
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endGraphic.remove()
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endGraphic = null
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}
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routeLayer.clear()
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}
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/**
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* 起点按钮
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*
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* @export
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* @param {string} type 不同方式路线查询
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* @returns {string}
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*/
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export function startPoint(type) {
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if (startGraphic) {
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startGraphic.remove()
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startGraphic = null
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}
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return map.graphicLayer
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.startDraw({
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type: "billboard",
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style: {
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image: "img/marker/start.png",
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horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
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verticalOrigin: Cesium.VerticalOrigin.BOTTOM
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}
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})
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.then((graphic) => {
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startGraphic = graphic
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const point = graphic.point
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point.format()
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// 触发自定义事件，改变输入框的值
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queryRoute(type)
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return point.lng + "," + point.lat
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})
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}
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/**
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* 终点按钮
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*
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* @export
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* @param {string} type 不同方式路线查询
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* @returns {string}
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*/
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export function endPoint(type) {
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if (endGraphic) {
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endGraphic.remove()
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endGraphic = null
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}
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return map.graphicLayer
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.startDraw({
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type: "billboard",
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style: {
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image: "img/marker/end.png",
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horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
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verticalOrigin: Cesium.VerticalOrigin.BOTTOM
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}
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})
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.then((graphic) => {
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endGraphic = graphic
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const point = graphic.point
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point.format()
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queryRoute(type)
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return point.lng + "," + point.lat
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})
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}
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function queryRoute(type) {
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if (!startGraphic || !endGraphic) {
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return
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}
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routeLayer.clear()
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showLoading()
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gaodeRoute.query({
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type: Number(type),
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points: [startGraphic.coordinate, endGraphic.coordinate],
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success: function (data) {
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hideLoading()
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const firstItem = data.paths[0]
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const points = firstItem.points
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if (!points || points.length < 1) {
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return
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}
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const time = mars3d.Util.formatTime(firstItem.allDuration)
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const distance = mars3d.MeasureUtil.formatDistance(firstItem.allDistance)
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const html = "<div>总距离：" + distance + "<br/>所需时间：" + time + "</div>"
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const graphic = new mars3d.graphic.PolylineEntity({
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positions: points,
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style: {
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clampToGround: true,
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material: Cesium.Color.AQUA.withAlpha(0.8),
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width: 5
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},
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attr: firstItem,
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popup: html
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})
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routeLayer.addGraphic(graphic)
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const allTime = mars3d.Util.formatTime(firstItem.allDuration)
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const allDistance = mars3d.MeasureUtil.formatDistance(firstItem.allDistance)
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let dhHtml = ""
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for (let i = 0; i < firstItem.steps.length; i++) {
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const item = firstItem.steps[i]
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dhHtml += item.instruction + "；"
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}
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eventTarget.fire("analyse", { allTime, allDistance, dhHtml })
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},
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error: function (msg) {
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hideLoading()
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globalAlert(msg)
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}
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})
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}
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// 点击保存GeoJSON
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export function saveGeoJSON() {
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if (routeLayer.length === 0) {
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globalMsg("当前没有标注任何数据，无需保存！")
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return
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}
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const geojson = routeLayer.toGeoJSON()
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mars3d.Util.downloadFile("导航路径.json", JSON.stringify(geojson))
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}
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