import * as mars3d from "mars3d"
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export let map // mars3d.Map三维地图对象
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let graphicLayer // 矢量图层对象
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export const mapOptions = {
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scene: {
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center: { lat: 31.255881, lng: 117.271026, alt: 60133, heading: 0, pitch: -46 }
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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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graphicLayer = new mars3d.layer.GraphicLayer()
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map.addLayer(graphicLayer)
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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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const turfOptions = { units: "kilometers" }
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const bbox = [116.984788, 31.625909, 117.484068, 32.021504]
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// 蜂窝网格
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export function hexGrid(cellSide) {
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const geojson = turf.hexGrid(bbox, cellSide, turfOptions)
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drawPolyon(geojson)
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}
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// 点网格
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export function pointGrid(cellSide) {
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const geojson = turf.pointGrid(bbox, cellSide, turfOptions)
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drawPoint(geojson)
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}
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// 正方形网格
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export function squareGrid(cellSide) {
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const geojson = turf.squareGrid(bbox, cellSide, turfOptions)
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drawPolyon(geojson)
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}
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// 三角形网格
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export function triangleGrid(cellSide) {
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const geojson = turf.triangleGrid(bbox, cellSide, turfOptions)
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drawPolyon(geojson)
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}
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// 蜂窝网格、正方形网格、三角形网格
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function drawPolyon(geojson) {
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graphicLayer.clear()
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const polygons = mars3d.Util.geoJsonToGraphics(geojson) // 解析geojson
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for (let i = 0; i < polygons.length; i++) {
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const item = polygons[i]
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const graphic = new mars3d.graphic.PolygonEntity({
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positions: item.positions,
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style: {
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color: "#ffff00",
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opacity: 0.2,
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outline: true,
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outlineWidth: 2,
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outlineColor: "#ffff00",
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outlineOpacity: 0.5,
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clampToGround: true
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},
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attr: item.attr,
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popup: "第" + i + "个"
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})
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graphicLayer.addGraphic(graphic)
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}
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}
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// 点网格
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export function drawPoint(geojson) {
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graphicLayer.clear()
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const points = mars3d.Util.geoJsonToGraphics(geojson) // 解析geojson
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for (let i = 0; i < points.length; i++) {
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const item = points[i]
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const graphic = new mars3d.graphic.PointPrimitive({
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position: item.position,
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style: {
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color: "#ffff00",
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pixelSize: 8
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},
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popup: "第" + i + "个"
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})
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graphicLayer.addGraphic(graphic)
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}
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}
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