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 limitHeight
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export const mapOptions = {
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scene: {
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center: { lat: 31.794547, lng: 117.21215, alt: 1672, heading: 18, pitch: -33 }
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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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map.fixedLight = true // 固定光照，避免gltf模型随时间存在亮度不一致。
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// 加模型
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const tilesetLayer = new mars3d.layer.TilesetLayer({
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name: "合肥天鹅湖",
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type: "3dtiles",
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url: "//data.mars3d.cn/3dtiles/qx-teh/tileset.json",
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position: { lng: 117.218434, lat: 31.81807, alt: 163 },
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maximumScreenSpaceError: 16,
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maximumMemoryUsage: 1024,
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dynamicScreenSpaceError: true,
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cullWithChildrenBounds: false,
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skipLevelOfDetail: true,
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preferLeaves: true
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})
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map.addLayer(tilesetLayer)
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// 限高分析类
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limitHeight = new mars3d.thing.LimitHeight({
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color: "rgba(255,0,0,0.5)",
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height: 80, // 限高
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bottomHeight: 32, // 模型地面的海拔高度（单位：米）
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positions: [
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[117.210446, 31.829032, 0],
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[117.226334, 31.826662, 0],
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[117.226694, 31.807882, 0],
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[117.209776, 31.808359, 0],
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[117.209778, 31.808341, 0]
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]
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})
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map.addThing(limitHeight)
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// 自动读取模型的高度，但不一定准确。
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// tilesetLayer.on(mars3d.EventType.load, function (event) {
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// limitHeight.bottomHeight = mars3d.LngLatPoint.fromCartesian(tilesetLayer.boundingSphere.center).alt
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// })
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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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// 滑动条
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export function currHeight(value) {
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limitHeight.height = value
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}
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// 绘制矩形
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export function drawExtent() {
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map.graphicLayer.clear()
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map.graphicLayer.startDraw({
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type: "rectangle",
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style: {
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color: "#ffff00",
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opacity: 0.3,
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clampToGround: true
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},
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success: function (graphic) {
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// 绘制成功后回调
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const positions = graphic.getOutlinePositions(false)
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limitHeight.positions = positions
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map.graphicLayer.clear()
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}
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})
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}
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// 绘制面
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export function drawPolygon() {
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map.graphicLayer.clear()
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map.graphicLayer.startDraw({
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type: "polygon",
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style: {
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color: "#ffff00",
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opacity: 0.3,
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clampToGround: true
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},
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success: function (graphic) {
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// 绘制成功后回调
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const positions = graphic.positionsShow
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limitHeight.positions = positions
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map.graphicLayer.clear()
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console.log("绘制坐标为", JSON.stringify(mars3d.PointTrans.cartesians2lonlats(positions))) // 方便测试拷贝坐标
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}
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})
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}
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export function clear() {
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limitHeight.clear()
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map.graphicLayer.clear()
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}
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