Function getSolarPosition

docs/app/js/sanddance-app.js:95785–95795

(timestamp, latitude, longitude)

var THETA0 = 280.147;
var THETA1 = 360.9856235;
function getSolarPosition(timestamp, latitude, longitude) {
    var longitudeWestInRadians = DEGREES_TO_RADIANS * -longitude;
    var phi = DEGREES_TO_RADIANS * latitude;
    var d = toDays(timestamp);
    var c = getSunCoords(d);
    var H = getSiderealTime(d, longitudeWestInRadians) - c.rightAscension;
    return {
        azimuth: getAzimuth(H, phi, c.declination),
        altitude: getAltitude(H, phi, c.declination)
    };
}
function getSunlightDirection(timestamp, latitude, longitude) {
    var _getSolarPosition = getSolarPosition(timestamp, latitude, longitude), azimuth = _getSolarPosition.azimuth, altitude = _getSolarPosition.altitude;
    var azimuthN = azimuth + Math.PI;