salat-first/dist/core/math.js

Islamic prayer times calculation with special support for Moroccan methods and Maliki madhab

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.degreesToRadians = degreesToRadians;
exports.radiansToDegrees = radiansToDegrees;
exports.normalizeToScale = normalizeToScale;
exports.unwindAngle = unwindAngle;
exports.quadrantShiftAngle = quadrantShiftAngle;
/**
 * Converts degrees to radians
 * @param degrees Angle in degrees
 * @returns Angle in radians
 */
function degreesToRadians(degrees) {
    return (degrees * Math.PI) / 180.0;
}
/**
 * Converts radians to degrees
 * @param radians Angle in radians
 * @returns Angle in degrees
 */
function radiansToDegrees(radians) {
    return (radians * 180.0) / Math.PI;
}
/**
 * Normalizes a value to be within a given scale
 * @param value The value to normalize
 * @param max The maximum value of the scale
 * @returns The normalized value
 */
function normalizeToScale(value, max) {
    return value - max * Math.floor(value / max);
}
/**
 * Unwinds an angle to be between 0 and 360 degrees
 * @param angle The angle in degrees
 * @returns The unwound angle between 0 and 360 degrees
 */
function unwindAngle(angle) {
    return normalizeToScale(angle, 360.0);
}
/**
 * Shifts an angle to be between -180 and 180 degrees
 * @param angle The angle in degrees
 * @returns The shifted angle between -180 and 180 degrees
 */
function quadrantShiftAngle(angle) {
    if (angle >= -180 && angle <= 180) {
        return angle;
    }
    return angle - 360 * Math.round(angle / 360);
}