import * as mars3d from "mars3d" export let map // mars3d.Map三维地图对象 let graphicLayer // 矢量图层对象 // 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) export const mapOptions = { scene: { center: { lat: 31.794428, lng: 117.235343, alt: 2351.9, heading: 1.6, pitch: -28.8, roll: 0 } } } /** * 初始化地图业务,生命周期钩子函数(必须) * 框架在地图初始化完成后自动调用该函数 * @param {mars3d.Map} mapInstance 地图对象 * @returns {void} 无 */ export function onMounted(mapInstance) { map = mapInstance // 记录map addLayer() } /** * 释放当前地图业务的生命周期函数 * @returns {void} 无 */ export function onUnmounted() { map = null } function addLayer() { map.basemap = 2017 // 蓝色底图 // 加载城市模型 const tilesetLayer = new mars3d.layer.TilesetLayer({ url: "//data.mars3d.cn/3dtiles/jzw-hefei2/tileset.json", maximumScreenSpaceError: 1, maximumMemoryUsage: 1024, style: { color: { conditions: [["true", `color("rgba(42, 160, 224, 1)")`]] } }, marsJzwStyle: true, popup: "all" }) map.addLayer(tilesetLayer) // 视角切换(分步执行) map.setCameraViewList([ { lat: 31.813938, lng: 117.240085, alt: 3243, heading: 357, pitch: -52 }, { lat: 31.821728, lng: 117.253605, alt: 1702, heading: 319, pitch: -37 }, { lat: 31.836674, lng: 117.260762, alt: 1779, heading: 269, pitch: -37 } ]) // 创建Graphic图层 graphicLayer = new mars3d.layer.GraphicLayer() map.addLayer(graphicLayer) // 测试点数据,实际开发时换掉 const arrPoints = getRandomPoints(1000) // 热力图 图层 const heatLayer = new mars3d.layer.HeatLayer({ positions: arrPoints, // 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 heatStyle: { radius: 60, blur: 0.85 }, // 以下为矩形矢量对象的样式参数 style: { arc: true, // 是否为曲面 height: 200.0 } // flyTo: true, }) map.addLayer(heatLayer) // 显示地面对应的点,测试渲染结果的正确性 for (let i = 0; i < arrPoints.length; i++) { const item = arrPoints[i] const primitive = new mars3d.graphic.PointPrimitive({ position: [item.lng, item.lat, 90], style: { color: "#ffff00", pixelSize: 7 } }) graphicLayer.addGraphic(primitive) } graphicLayer.show = false } // 显示对应的数据点 export function chkUnderground(val) { graphicLayer.show = val } // 获取bbox矩形区域内的count个随机点 function getRandomPoints(count) { const xmin = 117.226189 const xmax = 117.245831 const ymin = 31.828858 const ymax = 31.842967 const arr = [] const arrPoint = turf.randomPoint(count, { bbox: [xmin, ymin, xmax, ymax] }).features // 随机点 for (let i = 0; i < arrPoint.length; i++) { const item = arrPoint[i].geometry.coordinates const val = Math.floor(Math.random() * 100) // 热力值 arr.push({ lng: item[0], lat: item[1], value: val }) } return arr }