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Umlaut
Umlaut
Join Date 08/2005
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AI combat priorities

March 8, 2006 12:48:00 AM from GalCiv II ForumsGalCiv II Forums
What priority does the AI place on ships it cannot damage?

For instance: A. defender (small) with 3 beam attack vs. B. fighter (small) with 1 shield, 1 armor, 1 point defense, and 25 beam attack and C. battleship (large) with 1 shield and 5 beam attack.

The defense of B makes it impervious to enemy fire, but it is clearly the most dangerous ship with the least hitpoints. Does the AI determine that it is it's last priority because it cannot be defeated?
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Umlaut
Saber Cherry
Join Date 10/2005
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Reply #1 March 8, 2006 1:37:15 AM
from GalCiv II ForumsGalCiv II Forums
Priority is attack/(defense + hp). Whether a ship cannot (meaning, it is very improbable) be hurt by the attacker is not evaluated.
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Umlaut
Umlaut
Join Date 08/2005
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Reply #2 March 8, 2006 2:04:31 AM
from GalCiv II ForumsGalCiv II Forums
So in that case, the indestructable ship would take all the hits and be fine?

It isn't really an exploitable situation anyways, since the small defended ships with high attack have to use the special weapons and hence cost a few hundred bc, but for optimization sake, defender's with defense too high to damage should be dropped to the bottom of the attack priority.
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Frogboy
Join Date 03/2001
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Reply #3 March 8, 2006 2:07:40 AM
from GalCiv II ForumsGalCiv II Forums
The system picks the ship with the highest attack to defense ratio.  That is, the ship that does the most damage that is most vulnerable.
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Umlaut
Umlaut
Join Date 08/2005
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Reply #4 March 8, 2006 2:22:30 AM
from GalCiv II ForumsGalCiv II Forums
But an invincible ship shouldn't be attacked. It serves no purpose to attack one if it would be possible to damage any other ship there.
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Longbows
Join Date 03/2006
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Reply #5 March 8, 2006 3:12:26 AM
from GalCiv II ForumsGalCiv II Forums
Ship B would be attacked first probably. I've noticed that even though a ship has all the right defences, it still slowly loses hit points. Faster if the attacker has stronger attack ratings.

For example: I once made a mistake of loading up a "cargo" hull with all kinds of weaponry and defence measures. Statistically it was invicible relative to what others had at the time. BUT, the ship DIED 1 second after combat started. EVERY time. I only later noticed it had only 1 HP. So no matter what kind of defences I put on, a lousy colonial fighter (with a Laser 1 - maybe 2) destroyed it in a second...

Go figure.
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Brillig
Join Date 03/2003
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Reply #6 March 8, 2006 3:14:00 AM
from GalCiv II ForumsGalCiv II Forums
But there's no such thing as an invincible ship. Even a ship with 1000 defense can be damaged by a ship with an attack of 5.
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Peace Phoenix
Join Date 01/2004
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Reply #7 March 8, 2006 3:25:56 AM
from GalCiv II ForumsGalCiv II Forums
But an invincible ship shouldn't be attacked. It serves no purpose to attack one if it would be possible to damage any other ship there.

I don't understand your reasonning since Frogboy has stated:

The system picks the ship with the highest attack to defense ratio. That is, the ship that does the most damage that is most vulnerable.

Unless I am mistaken, invicible ship aren't ship with the highest attack to defense ratio, so they wouldn't be targetted.
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Need3Lives
Join Date 02/2006
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Reply #8 March 8, 2006 3:36:11 AM
from GalCiv II ForumsGalCiv II Forums
As Brillig mentioned, there are no invincible ships. Defense gets a roll, just like weapons do. In the OP's example, ship B could be damaged by ship A. Ship A would receive an attack roll of 0-3. Ship B would receive a defense roll of 0-3 (1 for beam defense + sq. root of 1 (also 1) of missile defense + sq. root of mass driver defense = 3). So, if Ship A rolled a 3 and ship B rolled a 0, ship B would take 3 damage. If B rolled a 2, it would take 1 damage. Only if B rolled a 3 (25% chance here assuming A rolled a 3) would B not take any damage.
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Umlaut
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Reply #9 March 8, 2006 5:20:08 AM
from GalCiv II ForumsGalCiv II Forums
I was under the impression that defense and attack rolled from 1 to defense rating. That would make the ship with one of each defense have 3 defense every time. I must have been mistaken.
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Saber Cherry
Join Date 10/2005
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Reply #10 March 8, 2006 10:45:33 PM
from GalCiv II ForumsGalCiv II Forums
Umlaut - the manual's description of combat rolls is wrong. Nobody (outside Stardock) knows for sure, but the formula is assumed by Kryo to be 1-max for attack, 0-max for defense. I assume it to be 0-max for each, since that's more symmetric.
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Entropy Avatar
Join Date 02/2006
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Reply #11 March 8, 2006 11:24:57 PM
from GalCiv II ForumsGalCiv II Forums
I think Kryo must be right, attacks are 1 to max. I've been fighting a lot of AI's lately in the early-early game with just 1 beam attack and me with no defence. I haven't seen them roll a zero in that situation yet. It means my 2-attack ships don't have as much of an advantage as I thought, as I average 1.5 damage to their 1, instead of 1 to their 0.5.
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