/*
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* @Author: GuLiMmo 2820890765@qq.com
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* @Date: 2024-03-22 08:50:18
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* @LastEditors: GuLiMmo 2820890765@qq.com
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* @LastEditTime: 2024-03-22 08:57:01
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* @FilePath: /drone-web/src/utils/turf.ts
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* @Description: turf
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*
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* Copyright (c) 2024 by ${git_name_email}, All Rights Reserved.
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*/
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import * as turf from '@turf/turf'
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import * as Cesium from 'cesium'
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// 中心点
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export function getRegionCenter (params: any[]) {
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const arr: any[] = []
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params.forEach((areaArray) => {
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const data = JSON.parse(areaArray)
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if (data.type === 'Polygon') {
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data.coordinates.forEach((item: turf.helpers.Position[]) => {
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arr.push(turf.centroid(turf.polygon([item])).geometry.coordinates)
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})
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} else {
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data.coordinates.forEach((item: turf.helpers.Position[][]) => {
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arr.push(turf.centroid(turf.polygon([item[0]])).geometry.coordinates)
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})
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}
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})
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if (arr.length === 1) {
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return arr[0]
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} else if (arr.length === 2) {
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return turf.centroid(turf.midpoint(turf.point(arr[0]), turf.point(arr[1]))).geometry.coordinates
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} else {
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arr.push(arr[0])
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return turf.centroid(turf.polygon([arr])).geometry.coordinates
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}
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}
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// 最值
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export const getMapBounds = (data: { x: number; y: number }[], type = '') => {
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const pointArr: turf.helpers.Feature<turf.helpers.Geometry, turf.helpers.Properties>[] = []
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data.forEach((item: { x: number; y: number }) => {
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pointArr.push(turf.point([item.x, item.y]))
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return false
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})
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const features = turf.featureCollection(pointArr)
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const scope = turf.envelope(features).bbox
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// const poly = turf.polygon([[[0, 29], [3.5, 29], [2.5, 32], [0, 29]]])
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return scope
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}
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// 加载面
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export function addDataToGlobe (polygonArr: string[], viewer: Cesium.Viewer) {
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const polygonInstances: any[] = []
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polygonArr.forEach((item: string, index: any) => {
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let position: any = item
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.slice(9, item.length - 2)
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.replace(/,/g, ';')
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.replace(/ /g, ',')
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.split(';')
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position = position.map((item: string) => item.split(',').map((i) => Number(i)))
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position = position.map((item: any) => Cesium.GeoJsonDataSource.crsNames['EPSG:4524'](item))
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const polygonArr = position.reduce((pre: any[], cur: any[]) => {
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pre.push(cur[0])
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pre.push(cur[1])
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return pre
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}, [])
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// polygonArr 格式 [112, 24, 115, 25, 116, 27]
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const polygon = new Cesium.PolygonGeometry({
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polygonHierarchy: new Cesium.PolygonHierarchy(Cesium.Cartesian3.fromDegreesArray(polygonArr)),
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vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
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})
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const geometry = Cesium.PolygonGeometry.createGeometry(polygon)
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polygonInstances.push(
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new Cesium.GeometryInstance({
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geometry: geometry as any,
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attributes: {
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color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.GREEN),
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},
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}),
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)
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})
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const polylinePrimitive = new Cesium.Primitive({
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geometryInstances: polygonInstances,
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appearance: new Cesium.PerInstanceColorAppearance(),
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asynchronous: false, // 确定基元是异步创建还是阻塞直到准备就绪
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})
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viewer.scene.primitives.add(polylinePrimitive)
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}
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