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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let lineLayer
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export const mapOptions = {
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scene: {
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center: { lat: 31.855058, lng: 117.312337, alt: 79936, heading: 0, pitch: -90 }
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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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// 创建矢量数据图层
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graphicLayer = new mars3d.layer.GraphicLayer()
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map.addLayer(graphicLayer)
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// 基础线矢量数据
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lineLayer = new mars3d.layer.GraphicLayer()
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map.addLayer(lineLayer)
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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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export function drawLine() {
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clearLayer()
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lineLayer.startDraw({
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type: "polyline",
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style: {
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color: "#55ff33",
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width: 3,
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clampToGround: false
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}
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})
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}
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// 计算曲线
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export function calculationCurve() {
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graphicLayer.clear()
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let line = lineLayer.getGraphics()
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if (line.length === 0) {
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globalMsg("请绘制线！")
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return
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}
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line = line[0].toGeoJSON()
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const curved = turf.bezierSpline(line)
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const positions = curved.geometry.coordinates
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const graphic = new mars3d.graphic.PolylineEntity({
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positions: positions,
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style: {
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width: 4,
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color: "#00ffff"
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}
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})
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graphicLayer.addGraphic(graphic)
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}
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// 计算平行线
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export function parallelLines(distance) {
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let line = lineLayer.getGraphics()
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if (line.length === 0) {
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globalMsg("请绘制线！")
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return
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}
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line = line[0].toGeoJSON()
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graphicLayer.clear()
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const offsetLine = turf.lineOffset(line, distance, { units: "miles" })
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const positions = offsetLine.geometry.coordinates
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const graphic = new mars3d.graphic.PolylineEntity({
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positions: positions,
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style: {
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width: 4,
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color: "#ff0000"
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}
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})
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graphicLayer.addGraphic(graphic)
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}
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export function clearLayer() {
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graphicLayer.clear()
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lineLayer.clear()
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}
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