地图放大
地图缩小
代码：
import * as mars3d from "mars3d"export let map // mars3d.Map三维地图对象// 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: 25.873121, lng: 119.290515, alt: 51231, heading: 2, pitch: -71 },showSun: false,showMoon: false,showSkyBox: false,showSkyAtmosphere: false,fog: false,backgroundColor: "#363635", // 天空背景色contextOptions: { webgl: { antialias: mars3d.Util.isPCBroswer() } },logarithmicDepthBuffer: false, // 对数深度缓冲区[当热力图出现阴影体或遮挡时设置下]globe: {baseColor: "#363635", // 地球地面背景色showGroundAtmosphere: false,enableLighting: false},cameraController: {zoomFactor: 1.5,minimumZoomDistance: 0.1,maximumZoomDistance: 200000,enableCollisionDetection: false // 允许进入地下}}
}/*** 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// map.basemap = 2017 // 暗色底图mars3d.Util.fetchJson({ url: "//data.mars3d.cn/file/apidemo/heat-fuzhou.json" }).then(function (result) {const arrPoints = []for (let i = 0; i < result.Data.length; i++) {const item = result.Data[i]arrPoints.push({ lng: item.x, lat: item.y, value: item.t0 })}showHeatMap(arrPoints)})// addTerrainClip()
}/*** 释放当前地图业务的生命周期函数* @returns {void} 无*/
export function onUnmounted() {map = null
}function showHeatMap(arrPoints) {// 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.htmlmax: 20000,heatStyle: {radius: 20,minOpacity: 0,maxOpacity: 0.4,blur: 0.3,gradient: {0: "#e9ec36",0.25: "#ffdd2f",0.5: "#fa6c20",0.75: "#fe4a33",1: "#ff0000"}},// 以下为矩形矢量对象的样式参数style: {opacity: 1.0// clampToGround: true,},redrawZoom: true, // 视角缩放时是否进行按新的raduis进行渲染。flyTo: true})map.addLayer(heatLayer)window.heatLayer = heatLayermap.on(mars3d.EventType.mouseMove, (e) => {const point = mars3d.LngLatPoint.fromCartesian(e.cartesian)const data = heatLayer.getPointData(point)if (!data.x) {return}const inhtml = `经度: ${point.lng} <br />纬度: ${point.lat} <br />X值: ${data.x} <br />Y值: ${data.y} <br />value值: ${data.value} <br />颜色:<span style="background-color: ${data.color};padding:2px 5px;">${data.color}</span>`map.openSmallTooltip(e.windowPosition, inhtml)})
}// 添加地形外裁剪
async function addTerrainClip() {const geojson = await mars3d.Util.fetchJson({ url: "http://data.mars3d.cn/file/geojson/areas/350100.json" })const arr = mars3d.Util.geoJsonToGraphics(geojson) // 解析geojsonconst options = arr[0]const terrainClip = new mars3d.thing.TerrainClip({image: false,splitNum: 10, // 井边界插值数clipOutSide: true})map.addThing(terrainClip)terrainClip.addArea(options.positions, { simplify: { tolerance: 0.004 } })map.scene.globe.depthTestAgainstTerrain = false // 关闭深度
}
相对路径：
src\example\layer-other\heatmap\heatLayer\map.js
下载示例；
git clone https://gitee.com/marsgis/mars3d-vue-example.git
