import {Constant} from ‘./Constant’;
 import {Poly} from ‘./Poly’;
 exportclassComputeClass{
 /* vec3ToLatLong 函数用于将表示球体上的点的 3D 矢量转换为其相应的纬度和经度坐标。 */
 vec3ToLatLong (i, cY) {
 this.LatLong = BABYLON.Vector2.Zero();
 this.Lon = Math.acos(i.x / Math.sqrt(Math.pow(i.x, 2) + Math.pow(i.z, 2)));
 if (i.z < 0) {
 this.Lon = 2 * Math.PI - this.Lon
 };
 this.Lat = Math.acos(i.y / i.length());
 if (cY) {
 this.LatLong.x = this.Lat;
 this.LatLong.y = this.Lon
 } else {
 this.LatLong.x = 90 - (this.Lat * 180 / Math.PI);