package com.javaweb.geo.utils;

import com.javaweb.common.utils.NumberUtils;
import org.gavaghan.geodesy.Ellipsoid;
import org.gavaghan.geodesy.GeodeticCalculator;
import org.gavaghan.geodesy.GeodeticCurve;
import org.gavaghan.geodesy.GlobalCoordinates;

public class ExceptionDistanceUtils {

    public static double getDistanceMeter(GlobalCoordinates gpsFrom, GlobalCoordinates gpsTo, Ellipsoid ellipsoid)
    {
        //创建GeodeticCalculator，调用计算方法，传入坐标系、经纬度用于计算距离
        GeodeticCurve geoCurve = new GeodeticCalculator().calculateGeodeticCurve(ellipsoid, gpsFrom, gpsTo);

        return geoCurve.getEllipsoidalDistance();
    }

    /**
     * 计算距离
     * @param lng1
     * @param lat1
     * @param lng2
     * @param lat2
     * @return
     */
    public static double distance(Double lng1,Double lat1 ,Double lng2 ,Double lat2){
        GlobalCoordinates source = new GlobalCoordinates(lat1, lng1);
        GlobalCoordinates target = new GlobalCoordinates(lat2, lng2);

        double meter2 = getDistanceMeter(source, target, Ellipsoid.WGS84);
        return NumberUtils.div(meter2,1,2);
    }

    public static void main(String[] args) {
        double distance = distance(116.510842,39.90777,116.510958,39.90786);
        System.out.println(distance);
    }

}