qibla/lib/qibla.js

A helper class (Qibla) to provide you the qibla direction relative to True North based on provided coordinates

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Qibla = void 0;
var angle_utils_1 = require("./angle-utils");
/** A helper class to provide you the qibla direction
 * relative to True North based on provided coordinates */
var Qibla = /** @class */ (function () {
    function Qibla() {
    }
    /**
    * Calculates the qibla direction relative to True North
    * @param {number} latitude The latitude
    * @param {number} longitude The longitude
    * @return {number} The Qibla angle from True North
    */
    Qibla.degreesFromTrueNorth = function (latitude, longitude) {
        // Kaaba: https://www.google.com/maps/place/Kaaba/@21.4224576,39.8260568,63m
        var qiblaLocationLat = 21.4224576;
        var qiblaLocationLong = 39.8260568;
        var phiS = angle_utils_1.AngleUtils.toRadians(latitude);
        var phiF = angle_utils_1.AngleUtils.toRadians(qiblaLocationLat);
        var deltaL = angle_utils_1.AngleUtils.toRadians(longitude - qiblaLocationLong);
        return angle_utils_1.AngleUtils.adjust(angle_utils_1.AngleUtils.toDegrees(Math.atan2(Math.sin(deltaL), Math.cos(phiS) * Math.tan(phiF) -
            Math.sin(phiS) * Math.cos(deltaL))));
    };
    return Qibla;
}());
exports.Qibla = Qibla;