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
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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: 31.353044, lng: 117.230763, alt: 58544, heading: 1, pitch: -51 }
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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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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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// const attr = event.graphic.attr
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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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addDemoGraphic(1)
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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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// 生成演示数据
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export function addDemoGraphic(num) {
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graphicLayer.clear()
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showLoading()
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const startTime = new Date().getTime()
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const count = num * 10000
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const gridSize = 45 / Math.sqrt(count)
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const bbox = [116.984788, 31.625909, 117.484068, 32.021504]
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const geojson = turf.pointGrid(bbox, gridSize, { units: "kilometers" })
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const arrData = mars3d.Util.geoJsonToGraphics(geojson) // 解析geojson
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const radius = (gridSize * 1000) / 2
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for (let j = 0; j < arrData.length; ++j) {
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const position = mars3d.LngLatPoint.toCartesian(arrData[j].position)
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const pt1 = mars3d.PointUtil.getPositionByDirectionAndLen(position, 225, radius)
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const pt3 = mars3d.PointUtil.getPositionByDirectionAndLen(position, 315, radius)
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arrData[j] = {
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positions: [pt1, position, pt3],
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style: {
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color: Cesium.Color.fromRandom({ alpha: 1.0 }),
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diffHeight: radius
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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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// 多个面对象的合并渲染。
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const primitive = new mars3d.graphic.WallCombine({
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instances: arrData,
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// style: {
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// outline: true,
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// outlineWidth: 1,
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// outlineColor: "#ffffff",
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// },
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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.withAlpha(0.9)
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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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// console.log(usedTime);
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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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