import * as mars3d from "mars3d"
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export let map // mars3d.Map三维地图对象
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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: 3.74685, lng: 103.588387, alt: 14532035, heading: 0, pitch: -86 }
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}
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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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map.basemap = 2017
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queryPopulationApiData()
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.then(function (data) {
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showData(data)
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})
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.catch(function (data) {
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console.log("ajax请求出错", data)
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})
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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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// 访问后端接口，取数据
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function queryPopulationApiData() {
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return mars3d.Util.fetchJson({ url: "//data.mars3d.cn/file/apidemo/population.json" })
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}
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function showData(data) {
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const heightScale = 2000000
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// 创建Graphic图层
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const graphicLayer = new mars3d.layer.GraphicLayer()
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map.addLayer(graphicLayer)
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// 在layer上绑定监听事件
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graphicLayer.on(mars3d.EventType.click, function (event) {
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console.log("监听layer，单击了矢量对象", event)
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})
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// 在layer上绑定Popup弹窗
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graphicLayer.bindPopup(function (event) {
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const attr = event.graphic.attr || {}
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attr["类型"] = event.graphic.type
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attr["来源"] = "我是layer上绑定的Popup"
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attr["备注"] = "我支持鼠标交互"
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return mars3d.Util.getTemplateHtml({ title: "矢量图层", template: "all", attr: attr })
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})
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for (let x = 0; x < 1; x++) {
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const series = data[x]
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const coordinates = series[1]
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// Now loop over each coordinate in the series and create
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for (let i = 0; i < coordinates.length; i += 3) {
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const latitude = coordinates[i]
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const longitude = coordinates[i + 1]
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const height = coordinates[i + 2]
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// Ignore lines of zero height.
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if (height === 0) {
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continue
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}
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const color = Cesium.Color.fromHsl(0.6 - height * 0.5, 1.0, 0.5)
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const surfacePosition = Cesium.Cartesian3.fromDegrees(longitude, latitude, 0)
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const heightPosition = Cesium.Cartesian3.fromDegrees(longitude, latitude, height * heightScale)
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const primitive = new mars3d.graphic.PolylineEntity({
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positions: [surfacePosition, heightPosition],
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style: {
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width: 4,
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color: color
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},
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attr: { gdp: height }
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})
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graphicLayer.addGraphic(primitive)
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}
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}
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}
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