Whats with the latitude and longitude command line options?
You can tell BZFlag the latitude and longitude of the host you’re using and it’ll calculate the sun position based on them. For example, if you used a latitude of 90 and any longitude, you’d be at the north pole; the sun would never come up in the winter and never set in the summer. The sun, moon, and star positions are based on the latitude, longitude, time of day, and time of year and should be fairly accurate. The phase of the moon is also accurately computed. This feature is more of a curiosity than something useful.
