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Posted: **Fri Jun 19, 2009 9:04 pm**

So I've been messing around with AI properties for a while trying to get them to do things that real soldiers would do, and I thought they would run away if enough of their comrades died right? So I went ahead and made a script to give them to "defend" an object outside the maps boundary, and whaddaya know they didn't run.

Here is my script:

Code: Select all

    ATT_ReinforcementCount = GetReinforcementCount(ATT)
    if ATT_ReinforcementCount < 50 then
        AddAIGoal(ATT, "Defend", 600, "Russian_retreat")
    end

    DEF_ReinforcementCount = GetReinforcementCount(DEF)
    if DEF_ReinforcementCount < 30 then
        AddAIGoal(DEF, "Defend", 200, "German_retreat")
    end

Nothing in the error log is there that wasn't there before, the "German_retreat" and "Russian_retreat" are objects on the map (a yavin object I placed underground and set to be on the side that would retreat to them) that I named that.

Thanks in advance.

Posted: **Fri Jun 19, 2009 10:01 pm**

Very ingenious, but I don't know why it wouldn't work. Would your answer lie in the Kashyyyk campaign script? Or was that retreat fudged?

Posted: **Sat Jun 20, 2009 1:10 am**

Most likely fudged; they all were killed and then respawned behind the fort.

Posted: **Sat Jun 20, 2009 4:24 am**

This is just a suggestion, since I don't really do scripting, but maybe you should clear or delete the other AI goals for the team in question, so that the defend goal for the retreat carries all of the weight. As far as I can tell, so long as a goal has any weight, the AI will be assigned to that goal.

It also might be worth it to try changing the CP strategic values via the script as well. The docs don't seem to state specifically, but it appears these values determine what priorites are given to attacking and defending the individual CPs.

Posted: **Sat Jun 20, 2009 8:38 am**

AQT wrote:Most likely fudged; they all were killed and then respawned behind the fort.

Actually it wasn't, the AI were given an objective to "Defend" the refinery objects and I'm trying to get the AI to do the same to objects outside the boundary.

MercuryNoodles I doubt the 2nd thing you suggested would work, but perhaps clearing the AI goals would give me a tip as to what the problem is.

Posted: **Sat Jun 20, 2009 8:47 am**

do the objects have health or are they just props i'm not sure AI defend just props (maybe they're smarter than you think) because if you were told to defend something that couldn't be destroyed or captured would you do it...

I'm trying to say that the only things in BF2 that have an AI defend goal attached to them is destructable things or flags (in ctf and 1flag) maybe possibly giving those objects (german retreat and russian retreat health's (probably a huge one like 1000000) the AI may be more responsive

Posted: **Sat Jun 20, 2009 8:56 am**

That is probably true, but I've found the main source of the problem. I'm 80% sure that the problem is that you can't constantly get the reinforcement count of a team, and I have no way that I can think of that would trigger it to go off when it reaches the number of reinforcements.

Posted: **Sat Jun 20, 2009 11:30 am**

Use OnCharacterDeath and check the reinforcements inside it.

Posted: **Sat Jun 20, 2009 12:20 pm**

Sorry for my lack of knowledge I haven't scripted in a long time so I'm a bit rusty. Could you write out the code for me?

Posted: **Sat Jun 20, 2009 1:25 pm**

I'm only a newbie at this myself, but something along the lines of:

Code: Select all

OnCharacterDeath(
function (player, killer)
GetReinforcementCount (team)
end
)

Posted: **Sat Jun 20, 2009 3:52 pm**

Still doesn't work, again nothing in the error log that wasn't there before.

Here is my code:

Hidden/Spoiler:

OnCharacterDeath(

    function (player, killer)

    ATT_ReinforcementCount = GetReinforcementCount(ATT)

    end

    )

    if ATT_ReinforcementCount < 50 then

        ClearAIGoals(ATT)

        --AddAIGoal(ATT, "Defend", 600, "Russian_retreat")

    end

    OnCharacterDeath(

    function (player, killer)

    DEF_ReinforcementCount = GetReinforcementCount(DEF)

    end

    )

    if DEF_ReinforcementCount < 30 then

        ClearAIGoals(DEF)

        --AddAIGoal(DEF, "Defend", 200, "German_retreat")

    end

Posted: **Sat Jun 20, 2009 6:27 pm**

You want this:

Code: Select all

ATT_Retreat = OnCharacterDeath(
    function(player, killer)
        --only care when dead player is on the ATT team
        if GetCharacterTeam(player) ~= ATT then return end

        if GetReinforcementCount(ATT) < 50 then
           --tell ATT to retreat
           ClearAIGoals(ATT)
           AddAIGoal(ATT, "Defend", 600, "Russian_retreat")

           --stop watching this OnCharacterDeath so we don't waste game resources
           ReleaseOnCharacterDeath(ATT_Retreat)
        end
    end
)

DEF_Retreat = OnCharacterDeath(
    function(player, killer)
        --only care when dead player is on the DEF team
        if GetCharacterTeam(player) ~= DEF then return end

        if GetReinforcementCount(ATT) < 30 then
           --tell DEF to retreat
           ClearAIGoals(DEF)
           AddAIGoal(DEF, "Defend", 600, "German_retreat")

           --stop watching this OnCharacterDeath so we don't waste game resources
           ReleaseOnCharacterDeath(DEF_Retreat)
        end
    end
)

It may have typos, I didn't check it.

Your original problem was that your code was only running once. You have to put it in an OnCharacterDeath event callback so that every time someone dies, the code is run again.

The AI goal Follow should give a tighter/faster retreat if Defend isn't good enough.

You could add in a ShowMessageText("Run for your lives!", ATT) to tell the humans that the AI are retreating. It would go after adding the new AI goal.

Posted: **Sat Jun 20, 2009 7:56 pm**

Thanks Zerted that worked, oh and just for anyone else who wants to get their AI to retreat you must have a invisible CP for the AI to retreat to.

Posted: **Mon Jun 22, 2009 4:09 pm**

[RDH]Zerted wrote:The AI goal Follow should give a tighter/faster retreat if Defend isn't good enough.

Woah! Sorry to derail, but I was wondering about this kind of thing. How does this work? Do you specify, say, a path or planning arc for the AI to follow? What is the difference between this and "patrol"?

Posted: **Mon Jun 22, 2009 6:13 pm**

http://www.secretsociety.com/forum/down ... IGoals.txt

Posted: **Mon Jun 22, 2009 6:32 pm**

bobfinkl wrote:...you must have a invisible CP for the AI to retreat to.

You shouldn't have to use a CP. Check that ScriptAIGoals.txt doc. It says you can use any game object pointer (gameObjectPtr) or any integer character index (integerChrIdx) for Defend. The pointers are the game objects and the index is the number you get as the character value for all those character event callbacks, such as OnCharacterSpawn.

Posted: **Mon Jun 22, 2009 6:47 pm**

Odd, because once I switched it to a cp it worked and before it refused to. I'll try some other objects and see if they work.

Posted: **Mon Jun 22, 2009 7:42 pm**

Well if you're not over the CP limit, theres no problem in using another CP.

Posted: **Mon Jun 22, 2009 8:21 pm**

Then I guess this is solved then, admins go ahead and lock this.

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