helper.js

import * as UTM from './geodesy/utm.js';

/**
 * Provides common functions.
 */
class Helper
{
    /**
     * Converts a latitude and longitude into UTM.
     * @param {number} lat 
     * @param {number} lon 
     * @param {number} zone The UTM zone that the location is in. Make sure this is the same as the Project's zone or the returned values will be off the Project's map.
     * @return {object} Object containing the easting, northing and zone values.
     */
    static convert_latlon_to_utm(lat, lon, zone)
    {
        let latlon = new UTM.LatLon(lat, lon);
        let utm = latlon.toUtm(zone);
        return {zone: utm.zone, easting: utm.easting.toFixed(0), northing: utm.northing.toFixed(0)};
    }

    /**
     * Rounds a number to the required decimal points.
     * @param {number} number 
     */
    static round(number, decimals = 0)
    {
        if (decimals > 10) decimals = 10;
        if (decimals < 0) decimals = 0;
        let num = number * Math.pow(10, decimals);
        num = Math.round(num);
        return num / Math.pow(10, decimals);
    }
}

export {Helper};