public Fix GetMagnitude()
{
if (X == 0 && Y == 0)
{
return(Fix.Zero);
}
var n = (ulong)(X.Raw * (long)X.Raw + Y.Raw * (long)Y.Raw);
return(new Fix((int)(FixMath.SqrtULong(n << 2) + 1) >> 1));
}