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| 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: 20.648765, lng: 129.340334, alt: 19999976, heading: 355, pitch: -89 }
| },
| control: {
| sceneModePicker: false
| }
| }
|
| /**
| * 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 // 蓝色底图
| addLayer()
| }
|
| /**
| * 释放当前地图业务的生命周期函数
| * @returns {void} 无
| */
| export function onUnmounted() {
| map = null
| }
|
| let windLayer
| function addLayer() {
| windLayer = new mars3d.layer.WindLayer({
| particlesNumber: 9000,
| fadeOpacity: 0.996,
| dropRate: 0.003,
| dropRateBump: 0.01,
| speedFactor: 0.2,
| lineWidth: 4.0,
| // 色带配置
| colors: [
| "rgb(4,14,216)",
| "rgb(32,80,255)",
| "rgb(65,150,255)",
| "rgb(109,193,255)",
| "rgb(134,217,255)",
| "rgb(156,238,255)",
| "rgb(175,245,255)",
| "rgb(206,255,255)",
| "rgb(255,254,71)",
| "rgb(255,235,0)",
| "rgb(255,196,0)",
| "rgb(255,144,0)",
| "rgb(255,72,0)",
| "rgb(255,0,0)",
| "rgb(213,0,0)",
| "rgb(158,0,0)"
| ]
| })
| map.addLayer(windLayer)
|
| loadNetCDF("//data.mars3d.cn/file/apidemo/wind.nc").then((data) => {
| windLayer.setData(data)
| })
| }
|
| let canrefresh
|
| // 参数调整面板
| export function onParticleSystemOptionsChange(options) {
| clearTimeout(canrefresh)
| canrefresh = setTimeout(() => {
| windLayer.setOptions(options)
| }, 500)
| }
|
| // 加载并解析NC数据
| function loadNetCDF(filePath) {
| return new Promise(function (resolve) {
| const request = new XMLHttpRequest()
| request.open("GET", filePath)
| request.responseType = "arraybuffer"
|
| request.onload = function () {
| const arrayToMap = function (array) {
| return array.reduce(function (map, object) {
| map[object.name] = object
| return map
| }, {})
| }
|
| // eslint-disable-next-line new-cap
| const NetCDF = new netcdfjs(request.response)
| const variables = arrayToMap(NetCDF.variables)
| const uAttributes = arrayToMap(variables.U.attributes)
| const vAttributes = arrayToMap(variables.V.attributes)
|
| const arrLon = NetCDF.getDataVariable("lon").flat()
| const arrLat = NetCDF.getDataVariable("lat").flat()
| const arrU = NetCDF.getDataVariable("U").flat()
| const maxU = uAttributes.max.value
| const minU = uAttributes.min.value
| const arrV = NetCDF.getDataVariable("V").flat()
| const maxV = vAttributes.max.value
| const minV = vAttributes.min.value
|
| // 构造WindLayer类需要的格式数据
| const result = {
| xmin: Math.min(...arrLon),
| xmax: Math.max(...arrLon),
| ymin: Math.min(...arrLat),
| ymax: Math.max(...arrLat),
| rows: arrLat.length,
| cols: arrLon.length,
| udata: arrU, // 横向风速
| vdata: arrV, // 纵向风速
| umin: minU,
| umax: maxU,
| vmin: minV,
| vmax: maxV
| }
| resolve(result)
| }
| request.send()
| })
| }
|
| // 改变颜色
| export function changeColor(color) {
| windLayer.colors = [color]
| }
|
|
