[Freeciv-Dev] Re: City sort algorithm

[Mika Korhonen <mikak@xxxxxxxxxxxx>]

On Wed, 13 Oct 1999, Peter Schaefer wrote:

>Jarda Benkovsky wrote:
>> 
>> Mika Korhonen wrote:
>> > The simple Freeciv Real City Rate R that implements the specification is
>> > obtained by the following formulation
>> >
>> >         R = log P + log (A/1000)
>> >
>> > or      R = log P + log A - log 1000
>> >
>> > where P is the current population and A the age in year 2000 (when Freeciv
>> > usually ends, right). And that's how I ordered the cities :-) Hence, a city
>> > founded in 1999 and 1000 people gets zero rate.
>>
>
>Ehm - this is equivalent to
>
>       r = pow(R) = P*A/1000
>
>and sorting by r = P*A/1000.
>
>And what is the specification again :-)

For sorting purposes even P*A is, obviously, sufficient which on the other
hand cannot be reduced any further... -- the logarithm thing is just to get
nice looking numbers. (-:


        Mika    
_______________________________________________________________________________
Patience is a minor form of despair, disguised as virtue.
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