[Freeciv-Dev] Re: [PATCH] [1.2] move some common AI equations to kill_desire() (PR#1279)

[Gregory Berkolaiko <gberkolaiko@xxxxxxxxxxx>]

 --- Raimar Falke <hawk@xxxxxxxxxxxxxxxxxxxxxxx> wrote: 
> On Mon, Feb 25, 2002 at 04:58:07PM +0000, Gregory Berkolaiko wrote:
> > Ok, you are in for some trouble, boy.
> > 
> > First of all, I don't think the desire equation is fully correct.
> > 
> > To be mathematically sound it has to be of the following form
> > 
> > Desire = Probability_To_Win * Amount_Won - Probability_To_Lose *
> Amount_Lost
> > 
> > This would estimate your average win from the action (if you perform this
> > action N times, N is big, you'd be N*Desire better off).
> 
> Ack.
> 
> > The probabilities are estimated in this way:
> 
> > Probability_To_Win = Attack_Rating / (Attack_Rating + Defence_Rating)
> > Probability_To_Lose = Defence_Rating / (Attack_Rating + Defence_Rating)
> 
> Side note: I came across these a lot. Should be put into extra
> functions.

to return float?  probabilities are between 0 and 1 and should stay there

btw, it is also usually requirewd that
Probability_To_Win + Probability_To_Lose = 1
 
> > That is, with all other quantities constant and Victim_Count big our
> desire to
> > go and bash this city (possibly alone) would go up.  But they are NOT
> > helppless Victims, it's a city, not a stack!!!
> 
> You have to distinguish between the case 
>  - where Victim_Count enemy units will be killed if my unit wins and
>  - where another Victim_Count enemy units wait to kill me, even if my
>  unit has won

exactly, and these are pretty confused in the code...


> 
> > If you want, can add a comment from me: "Extremely dodgy usage of victim
> > count"
> 
> Dodgy isn't a common word for a non-native speaker.
> 
>       Raimar

well, it's an opportunity for a non-native speakers and Americans to learn
British slang ;)

G.

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