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Posted by Richard Lynch on 10/04/48 11:10
>> > Right now I'm working on a script that would calculate dates from one
>> > calendar to another. The normal calendar we use and a newly invented
> one.
>>
>> [shudder]
>> There are already WAY too many calendar systems.
>>
>> Inventing a new one is probably not such a good plan...
>>
>> Why re-invent the wheel?
>
> It's part of a game. In the RPG there are dates which the players would
> like
> to be able to convert from our calendar to that one, and back again..
You'll be way better off finding an existing calendar that "fits" your
criteria than inventing a new one.
>> But you didn't define how far into the future you need to go.
>> Current time?
>> A few years out?
>> Stardates from Star Trek?
>> You have to specify a start date, end date, and accuracy to choose a
>> correct calendar system.
>
> It's mostly the past. The RPG is set in Egypt and the beginning of the
> society in egypt has been taken as year 0. The start date I think is
> obvious, but I do not understand an end date of a calendar.. Perhaps I'm
> just blond.. but could you perhaps explain that one?
Here's your IDEAL calendar:
Your start date is 0 BC.
So let's make that be represented by: 0
Day 1 is, errr, December 26, 0 BC, represented by: 1
Day 2, December 27, 0 BC, represented by: 3
..
..
..
You can now calculate what's 2 billion+ (0xFFFFFFFF to be precise) days
later, and that would be the last date you could conveniently represent in
a 32-bit integer.
Do you expect the characters/events in your RPG to extend beyond 2 billion
days from December 25, 0 BC?
If so, then a 32-bit integer, one integer per day, simply won't cut it.
If not, then the above is an "ideal" date system.
Now, that was your "ideal" system. Find a system that comes close to that.
http://mysql.com
http://postgresql.org
PS Historians are ready to shoot me for using 12/25/0000 as 0 BC, but
that's their problem, not mine. It's an RPG. We're not looking for
historical accuracy here!
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