Realistic Movement for Monster AI and NPCs.

ID:265530
 
Dec 24 2005, 11:05 am
I wipped up this system, and it works, but it doesn't exactly give a realstic approach to it, monsters just walk around randomly.

How would I go about improving this system, so where they walk a little bit (moreover, they can't leave a certain radius from where they were created)

I want it more... friendly, where the mob only moves whenever a player (or client) is around, but where it does not persue the player, it just moves only when it's around to save CPU space.

(I wouldn't mind a "Aggressive" function, but that would be easy, just adding in walk_to() correct?)

mob/proc/Walk_Rand()
    spawn()
        sleep(rand(15,20))
        walk_rand(src)


(Didn't think this would go under CODE PROBLEMS, mainly because it's not really a problem.)
Dec 24 2005, 11:19 am
More Developers How-To, anyways, I think not so long ago someone (Be it Lummox, Unknown Person or O-matic) wrote a little script where the mob couldn't leave a desired area.. Might want to search.
Dec 24 2005, 11:26 am
In response to Mysame
Didn't find anything when I did a hub search.
Let me try the forums real quick.
Dec 26 2005, 3:08 pm
The only way to improve a system is to think of what features you would like to include. It's not enough to simply think "I want this to be more realistic, could someone give me a hand?"

Of course random movement isn't very realistic. I know I don't move around randomly in real life. ;-)

You've gotten a brief start in terms of what you would like the NPCs to do, but you need to define it better. One of my preferred systems is to select a random coordinate in range (e.g., within 20 tiles) and then walk there at a leisurely pace. Once there, wait a random length of time, then analyse the AI's priorities, and choose another coordinate to go to (assuming the task didn't change from "wander").
Dec 27 2005, 8:46 pm (Edited on Dec 27 2005, 8:52 pm)
Flame Sage wrote:
> mob/proc/Walk_Rand()
>   spawn()
>       sleep(rand(15,20))
>       walk_rand(src)
>


Well, when you say realistic, it all depends on how realistic you want it to be! I know you probably didn't want a code to come from someone, but I was bored and had a few ideas, so check this one out.

mob
    var
        Health=40
        MaxHealth=25
        Level=1
        Strength=15
mob/monster
    var
        mob/M//M is the monsters target
        agression=3
        speed=2
        thirst=0
        Intelligence=50
    Health=25
    MaxHealth=25
    New()
        src.walkattack()
    proc/walkattack()
        spawn while(speed*10)
            if(!src.M)
                var/mob/O=null
                for(var/client/C in orange(src.agression,src))
                    var/mob/Mob=C.mob
                    if(Mob)
                        if(Mob.Level-src.agression<=src.Level&&src.Strength+agression>=Mob.Strength&&Mob.Level>O.Level)
                            O=Mob
                if(O)
                    src.M=O
                    walk_to(src,O,src.speed)
            else
                var/HPPercent=round((src.Health/src.MaxHealth)*100)
                if(HPPercent<=round(src.Intelligence/7)&&prob(src.Intelligence))
                    walk_away(src,M)
                    view(src) <<"[src] runs away in panic!"
                else//the monster is fit for fighting!
                    src.M.Attack()
    Attack()
        if(!src.M)//strike back(if agression is 0) 0 agression means completly friendly
            src.M=usr
            walk_to(src,usr,src.speed)
        if(src.M)
            if(usr.Level>=src.M.Level)//check if a stronger player is in view!
                src.M=usr
                walk_to(src,usr,src.speed)
mob/verb/Attack()//attack is called when the usr attacks the src, so the verb is on the src
    set src in oview(1)
    view(src) <<"[usr] strikes at [src]!"