public static decimal GetAscendant(double longi, double lat, DateTime dateTime, bool isVedic = true)
{
var Pi = DecimalMath.Pi;
var DegToRad = Pi / 180;
var longitude = Convert.ToDecimal(-longi); // East should be positive, West negative
var latitudeRad = Convert.ToDecimal(lat) * DegToRad;
var tilt = CommonCalculations.GetAxialTilt(dateTime);
var tiltRad = tilt * DegToRad;
#if DEBUG
Console.WriteLine($"tilt: {tilt}");
#endif
var siderealTime = SiderealTime.Calculate(longitude, dateTime);
var siderealTimeRad = siderealTime * DegToRad;
#if DEBUG
Console.WriteLine($"sidereal Time: {siderealTime}");
#endif
var y = -DecimalMath.Cos(siderealTimeRad);
#if DEBUG
Console.WriteLine($"y :{y}");
Console.WriteLine(
$"sin(RAMC) = {DecimalMath.Sin(siderealTimeRad)}" +
$"\ncos(TILT) = {DecimalMath.Cos(tiltRad)}" +
$"\ntan(LAT) = {DecimalMath.Tan(latitudeRad)}" +
$"\nsin(TILT) = {DecimalMath.Sin(tiltRad)}");
#endif
var x = DecimalMath.Sin(siderealTimeRad) * DecimalMath.Cos(tiltRad)
+ DecimalMath.Tan(latitudeRad) * DecimalMath.Sin(tiltRad);
#if DEBUG
Console.WriteLine($"x :{x}");
Console.WriteLine($"Decimal y/x: {y / x}");
Console.WriteLine($"Atan(y/x): {DecimalMath.ATan(y / x)}");
#endif
var output = DecimalMath.ATan(y / x) * 180 / Pi;
if (output < 0)
{
output += 180;
}
if (siderealTimeRad > Pi / 2 && siderealTimeRad < 3 * Pi / 2)
{
output += 180;
output %= 360;
}
#if DEBUG
Console.WriteLine($"output before applying sidereal diff{output}");
#endif
return(output);
}
