[Freeciv-Dev] Re: Requirements for gen eff AI

[Raimar Falke <i-freeciv-lists@xxxxxxxxxxxxx>]

On Thu, May 13, 2004 at 02:26:34PM +0000, Per I. Mathisen wrote:
> I am in the process of writing a new AI for the gen eff patch, and which
> replaces the current improvements evaluation code. I need feedback from
> the list on the requirements specifications for this code.

Two ideas: assign each improvement a at runtime a value based on the
effects. This is very crude.

Second idea: only take the city-related (city-related = effects which
affect the output of the 6 stats and maybe happines) effects into
account. You can extract these easily. Example:

Improvement 1:
 + 5% food

Improvement 2:
 + 3% shield
 + 2% trade

delta_1 = FOOD_WEIGHT * current food * 5 %
delta_2 =
    SHIELD_WEIGHT * current shield * 3 % +TRADE_WEIGHT * current trade * 2 %

Now you compare delta_1 and delta_2.

For non-city-related (make-all-new-units-veteran, allow-nuclear for
example) you have assign some special value.

So I would go for understanding of the effects. You have to value them
somehow. I wasn't forced to do this with CMA because the effects of
the choices could be described in terms of the 6 stats. For these you
have to give weights. You could extend this model however. In addition
to shield-weight you also require a weight for
make-all-new-units-veteran and allow-nuclear. So your evaluation code
becomes a sum of change*weight.

        Raimar

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