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: 31.654436, lng: 117.083883, alt: 759, heading: 316, pitch: -50 }
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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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addLayer()
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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 addLayer() {
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map.fixedLight = true // 固定光照,避免gltf模型随时间存在亮度不一致。
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const tilesetLayer = new mars3d.layer.TilesetLayer({
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name: "石化工厂",
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url: "//data.mars3d.cn/3dtiles/max-shihua/tileset.json",
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position: { lng: 117.077158, lat: 31.659116, alt: 24.6 },
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maximumScreenSpaceError: 1,
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maximumMemoryUsage: 1024,
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center: {
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lat: 31.654436,
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lng: 117.083883,
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alt: 758.53,
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heading: 316.4,
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pitch: -50.1,
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roll: 359.8
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},
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popup: "all"
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})
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map.addLayer(tilesetLayer)
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// 测试点数据,实际开发时换掉
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const arrPoints = getRandomPoints(900)
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// 热力图 图层
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const heatLayer = new mars3d.layer.HeatLayer({
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positions: arrPoints,
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// 以下为热力图本身的样式参数,可参阅api:https://www.patrick-wied.at/static/heatmapjs/docs.html
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heatStyle: {
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radius: 40,
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blur: 0.8
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},
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// 以下为矩形矢量对象的样式参数
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style: {
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opacity: 0.6,
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classificationType: Cesium.ClassificationType.CESIUM_3D_TILE,
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clampToGround: true
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}
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})
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map.addLayer(heatLayer)
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}
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// 获取bbox矩形区域内的count个随机点
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function getRandomPoints(count) {
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const xmin = 117.075718
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const xmax = 117.083508
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const ymin = 31.654645
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const ymax = 31.661744
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const arr = []
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const arrPoint = turf.randomPoint(count, { bbox: [xmin, ymin, xmax, ymax] }).features // 随机点
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for (let i = 0; i < arrPoint.length; i++) {
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const item = arrPoint[i].geometry.coordinates
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const val = Math.floor(Math.random() * 100) // 热力值
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arr.push({ lng: item[0], lat: item[1], value: val })
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}
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return arr
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}
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