import * as mars3d from "mars3d"
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export let map // mars3d.Map三维地图对象
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export let graphicLayer // 矢量图层对象
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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: 31.806147, lng: 117.236965, alt: 3307, heading: 359, pitch: -54 }
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},
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terrain: {
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show: false
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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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// 创建Graphic图层
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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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const pickedItem = event.pickedObject?.data
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console.log("单击了合并对象中的单个值为", pickedItem)
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})
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bindLayerPopup() // 在图层上绑定popup,对所有加到这个图层的矢量数据都生效
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// 加一些演示数据
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addDemoGraphic1(graphicLayer)
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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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graphicLayer.remove()
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}
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function addDemoGraphic1(graphicLayer) {
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// 加一些演示数据
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Cesium.Resource.fetchJson({
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url: "//data.mars3d.cn/file/geojson/buildings-hf.json"
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})
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.then((data) => {
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const arr = mars3d.Util.geoJsonToGraphics(data, {
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symbol: {
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callback: function (attr, styleOpt) {
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return {
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width: 2.0,
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color: Cesium.Color.fromRandom({ alpha: 1.0 }) // 随机色
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}
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}
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}
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})
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globalMsg("共加载" + arr.length + "个线")
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// 多个线对象的合并渲染。
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const primitive = new mars3d.graphic.PolylineCombine({
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instances: arr,
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// 高亮时的样式
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highlight: {
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type: mars3d.EventType.click,
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color: Cesium.Color.YELLOW
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}
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})
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graphicLayer.addGraphic(primitive)
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})
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.catch(function (error) {
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console.log("服务出错", error)
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})
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}
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export function addDemoGraphic(count) {
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graphicLayer.clear()
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showLoading()
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const startTime = new Date().getTime()
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count = count * 10000
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const arrData = []
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for (let j = 0; j < count; ++j) {
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const position = randomPoint()
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const pt1 = mars3d.PointUtil.getPositionByDirectionAndLen(position, 225, 100)
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const pt3 = mars3d.PointUtil.getPositionByDirectionAndLen(position, 315, 100)
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arrData.push({
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positions: [pt1, position, pt3],
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style: {
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width: 2.0,
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height: random(30, 5000),
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color: Cesium.Color.fromRandom({ alpha: 1.0 })
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},
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attr: {
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name: "第" + j + "个"
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}
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})
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}
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// 多个线对象的合并渲染。
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const primitive = new mars3d.graphic.PolylineCombine({
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instances: arrData,
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// 高亮时的样式
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highlight: {
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type: mars3d.EventType.click,
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color: Cesium.Color.YELLOW
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}
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})
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graphicLayer.addGraphic(primitive)
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hideLoading()
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const endTime = new Date().getTime()
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// 两个时间戳相差的毫秒数
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const usedTime = (endTime - startTime) / 1000
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globalMsg("生成" + arrData.length + "条数据，共耗时" + usedTime.toFixed(2) + "秒")
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}
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// 在图层绑定Popup弹窗
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export function bindLayerPopup() {
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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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}
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// 取区域内的随机点
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function randomPoint() {
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const jd = random(117.143348 * 1000, 117.331228 * 1000) / 1000
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const wd = random(31.752147 * 1000, 31.890378 * 1000) / 1000
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return Cesium.Cartesian3.fromDegrees(jd, wd)
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}
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function random(min, max) {
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return Math.floor(Math.random() * (max - min + 1) + min)
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}
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