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/*
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* @Author: cbwu 504-wuchengbo@htsdfp.com
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* @Date: 2024-03-22 09:11:54
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* @LastEditors: cbwu
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* @LastEditTime: 2024-04-13 10:49:36
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* @Description: 坐标系转化
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*/
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import { Cartesian2, Viewer, Math, Cartographic, Cartesian3 } from 'cesium'
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/**
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* 屏幕坐标转笛卡尔坐标
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* @param viewer
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* @param windowPosition :屏幕二维坐标
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* @returns :笛卡尔坐标
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*/
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function cartesian2ToCartesian3(viewer: Viewer, windowPosition: Cartesian2) {
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const ray = viewer.camera.getPickRay(windowPosition)
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if (ray != undefined) {
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return viewer.scene.globe.pick(ray, viewer.scene)
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} else return undefined
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}
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/**
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* 屏幕坐标转地理坐标
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* @param viewer
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* @param windowPosition :屏幕坐标
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* @returns :WGS84坐标
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*/
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function cartesian2ToWGS84(viewer: Viewer, windowPosition: Cartesian2) {
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const cartesian3 = cartesian2ToCartesian3(viewer, windowPosition)
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if (cartesian3 != undefined) {
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return cartesian3ToWGS84(cartesian3)
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} else return []
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}
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/**
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* 笛卡尔坐标转WGS84坐标
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* @param pos 笛卡尔坐标
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* @returns 经纬度坐标
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*/
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function cartesian3ToWGS84(pos: Cartesian3) {
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if (pos) {
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const cartographic = Cartographic.fromCartesian(pos)
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const lon = Math.toDegrees(cartographic.longitude) // 经度
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const lat = Math.toDegrees(cartographic.latitude) // 纬度
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const alt = cartographic.height // 高度
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return [lon, lat, alt]
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}
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return []
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}
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export { cartesian2ToCartesian3, cartesian2ToWGS84, cartesian3ToWGS84 }
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