[freeciv-ai] Re: (PR#4089) Estimated incite gain is too high.
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On Wed, 30 Apr 2003, Per I. Mathisen wrote:
> On Wed, 30 Apr 2003, Gregory Berkolaiko wrote:
> > I don't see anything wrong. Yes, the want is a bit high, but it's no
> > fault of PF, the distances are all correct.
> > The want is high because incite want is high.
> I'll look at pf again, but the incite comment is dead on. Will you commit
Since we are at it, I thought about other ways of estimating gain. Here
are my ideas.
1. Cost to take city by force is (a) hard to estimate and (b) misses the
point: what if we don't _want_ the city?
2. We should instead ask "will we get our money back in reasonable time?".
This leads to the question of "reasonable time". I think we need
something like "planning horizon" which changes as we approach the
endyear. sqrt(turns_to_end) sounds like a good candidate.
3. We should probably consider surpluses rather than gross values. But we
don't care for enemy production surplus -- they might have tons of units
supported that we don't need. We pretend that we will have only 2 units
in the city, to defend it.
4. To stop before we go too deep, use
benefit = food_surplus * FOOD_WEIGHTING
+ (shield_prod - 2*def_upkeep) * SHIELD_WEIGHTING
+ (luxury_total + tax_total + science_total) * TRADE_WEIGHTING;
benefit *= planning_horizon;
benefit -= incite_cost * TRADE_WEIGHTING;
5. To go deeper, we might consider the effects of our
corruption/waste/government on that city. But I think that'd be too much.
> Index: ai/aidiplomat.c
> RCS file: /home/freeciv/CVS/freeciv/ai/aidiplomat.c,v
> retrieving revision 1.17
> diff -u -r1.17 aidiplomat.c
> --- ai/aidiplomat.c 18 Apr 2003 17:51:14 -0000 1.17
> +++ ai/aidiplomat.c 30 Apr 2003 14:17:53 -0000
> @@ -178,7 +180,7 @@
> + acity->tax_total
> + acity->science_total) * TRADE_WEIGHTING;
> gain_incite *= SHIELD_WEIGHTING; /* WAG cost to take city otherwise */
> - gain_incite -= incite_cost;
> + gain_incite -= incite_cost * TRADE_WEIGHTING;
> if (city_owner(acity)->research.techs_researched <
- [freeciv-ai] Re: (PR#4089) Estimated incite gain is too high.,
Gregory Berkolaiko <=