gameplay-ai

[glacial minnow]

how can i do this

[timber cargo]

@glacial minnow you can directly do that in the character blueprint directly

You can override the function called ON JUMPED in the character blueprint and disable the character movement then ON LANDED you can enable the movement back

@glacial minnow 👆

[glacial minnow]

can't I do this from the behavior tree?

[timber cargo]

@glacial minnow or if you feel like using the AI blackboard itself follow these

Create a bb bool value, then before the sequence add a service that checks if the player is in air on to a selector
Then create 2 sequences with each one representing each value of the boolean variable
Then on the one carrying the true you can add a task that disables the movement and on the false one you can just move your character

@glacial minnow hope you understand 👍

[glacial minnow]

i am reading now

this from blackboard

[timber cargo]

On the selector you'll have to create a service to always check if the player is in air

Then create another sequence on the selector with the same decorator but diffrent values

And the decorator on the selector should not be there but instead on the sequence

[glacial minnow]

wow

[timber cargo]

@glacial minnow do u have it working now

[glacial minnow]

i am new for the behavior tree and my english not good

so i couldn't

my bad sorry

i do that

from character bp

but i cant say if this true stop move to node from behavior tree

[timber cargo]

@glacial minnow that's another way, it should work now

[glacial minnow]

this setting is true?

[timber cargo]

@glacial minnow yeah it should work

[glacial minnow]

but it not working

i am make this both

and it work

but i dont understand

what is main is not set if i am set IsInAir boolean true it is not working yes? or i am set IsInAir Boolean False it is not working

[timber cargo]

@glacial minnow when the observer abort is set to both it means as soon as the value of the variable such as INAIR changes the execution stops everything and goes up the branch, and basically starts again

[glacial minnow]

wow

this is really important

[timber cargo]

Nothing wrong with this settings

[glacial minnow]

Is Not set = False and Is Set = True ?

[timber cargo]

@glacial minnow yeah

[glacial minnow]

wow

that is to really important

i am understand now

[timber cargo]

So basically if the player is in air you want nothing to happen but if it is not you want it to run everything below the decorator

[glacial minnow]

very descriptive thank you very much

I noted this information :)

again thanks

[timber cargo]

@glacial minnow no problem

[autumn ibex]

If I have the following variable as defined..

UBlackboardKeyType_Object waypointRoute;

What is this the correct way to get a reference to the AKOWaypointRoute class?
AKOWaypointRoute waypointRouteClass = Cast<AKOWaypointRoute>(waypointRoute.GetOuter());*

or should I do

AKOWaypointRoute* waypointRouteClass = Cast<AKOWaypointRoute>(waypointRoute.GetValue() );

👍

[cursive igloo]

Hey I need help
I want my AI to turn in place, but I don't know how to make it

https://www.youtube.com/watch?v=70HROEPbO-Y&ab_channel=AlainMajdalani
I watched this tutorial, but this tutorial uses "Tick" to make it
I don't like the way which uses "Tick" because of performance hits
Is there other smart way?

[queen escarp]

@cursive igloo this isnt really a expensive computation, its fine to use tick here, but u can always do a distance check and trigger the event

[west lark]

im making a racing game and i want to have an AI control all the other characters. Is there a good youtube tutorial for this?

[mint terrace]

yes Set Focus decorator in behavior tree or Face Towards task I think it's called

can't say it will be a lot more performant if you are doing the tick in c++ but it will be more performant than doing a tick in BP for sure

[buoyant geyser]

anyone know how to tell the navmesh to have just a single vertical level?

like a heightmap

no arches

[cursive igloo]

I have already been using set focus, but turn in place animation won't be played (even though I set turn inplace animations)

[mint terrace]

just by adjusting nav mesh bounds volume to be thin

¯\_(ツ)_/¯

[buoyant geyser]

nah

that discards anything above a set height

[mint terrace]

yep

[buoyant geyser]

what if you have a ramp

[mint terrace]

wait what do you mean by arches

you could probably customize the generator

[buoyant geyser]

could do many things but I want the quick & dirty solution

[mint terrace]

so the goal is no more than one nav mesh layer for a given X/Y?

[buoyant geyser]

yes

I saw mention of levels or something in recast code, I think it was a hardcoded static var somewhere

but that won't necessarily be the right approach

it might decide to pick the level that's closest to Z=0

whereas I'd need the one that's closest to Z=+inf, so the one that's highest

[mint terrace]

hmmmm looking around at recastnavmesh actor's settings

theres a bit related to layer partitioning but im not sure if it would be useful

@buoyant geyser one hacky way is to set the agent height to a high number

wouldnt consider the lower portion to be navigable because it needs to support at least the height of the tallest agent that can navigate it

but this depends on your level design

otoh anything ceiling side in an RTS could be zero collision anyway sooo [if there even is a ceiling]

obviously wouldnt work if the underpass is the only thing navigable

yeah thats all i got, other than just using multiple nav mesh bounds volumes and/or nav modifier volumes with nav area null

[buoyant geyser]

that's not a terrible idea

[mint terrace]

yeah the only downside is if you want an underpass you cant

[buoyant geyser]

I don't

explicitly don't

[mint terrace]

¯_(ツ)_/¯

cool

[buoyant geyser]

from now on you're the navmesh expert, congratulations

[mint terrace]

🏆

[mint terrace]

turn in place animations are a regular frustration here -- i know they are possible but i havent done it. i think this Inside Unreal covers turn in place stuff maybe its helpful https://www.youtube.com/watch?v=i9aNx1X-Wm8

but i dont know if they cover its relation to BT

[cursive igloo]

hey I have a question
Is there the way to detect "AI Controller rotate"?
As I said, I don't want to use "Tick", so I want to detect "AI Controller did rotate" and connect them to "turn" custom event

[mint terrace]

i dont think so, but if you are really concerned about perf, maybe do it in C++

considering AIController is doing it, you arent adding a tremendous amount of cost

i wouldnt preoptimize ticking in C++

but if it is a problem, then there are "ways"

such as tick aggregation like what Sea of Thieves uses (theres a GDC talk on it)

[cursive igloo]

ok thanks....
I should use Tick obediently...

[mint terrace]

if you are doing this all in blueprint, then i think its worth the cost for this, just dont go thinking blueprint ticks are free or anything and if it becomes a perf problem in the future it will be less of a problem if you dont use tick for everything like i did once long long (ahem, super long ago)

on a different track though

couldnt you just do this in the anim blueprint anyway?

you already need to check for things like "is the character in air" etc

why not just keep track of what the character's last rotation was, and then select an animation based on how its changing

[mint terrace]

i think that would work no?

[cursive igloo]

I don't know C++ at all...

[mint terrace]

no i mean animation blueprint

the thing that defines the animation played for the AI character

why not just keep track of what the character's last rotation was, and then select an animation based on how its changing

[cursive igloo]

ah I haven't tried yet so I'm trying now

[buoyant geyser]

how come recast tiles are off by 15 cm in size from what's set?

I have a tile size UU of 2048 yet my recast tiles are only 2033cm x 2033cm

[mint terrace]

hmm

@buoyant geyser whats your cell size?

the tile size that actually gets used is driven by fmath::trunctoint(tilesizeuu / cellsize) * cellsize

if you were using the default cell size which i think is 10 then it would be 2040x2040

this is just from a reading of its use

but it would explain it

presumably the goal here is to ensure that tiles are evenly divisible into a discrete set of cells

[opal rain]

Hello, I noticed that by placing 20+ actors with AIPerception some of them react really slow, how could I prevent that? Thanks

[misty wharf]

They probably do a lot of sight line traces, so you can adjust what they try to see so they do less traces, or you can increase the maximum time for perception checks

the perception check max time is something you can adjust in a config file, but I don't remember the exact thing off the top of my head

[buoyant geyser]

good point

wonder if there's a reason behind the default tile size not being divisible by the default cell size

[opal rain]

@misty wharf I found these values MaxTracesPerTick=600
MaxTimeSlicePerTick=0.5
but doesn't seem to change anything

[misty wharf]

Increasing max time slice per tick should help

you may have to update the other one too I guess depending on how many traces are being done

[opal rain]

okay thanks,
[/Script/AIModule.AISense_Sight], and do you know if I also have to add a hearing script on the Game.ini?

[misty wharf]

I'm not sure if hearing works the same way as sight does

it probably only runs logic when you trigger an event for it

[granite robin]

WTF is going on here - for some reason my AI, randomly, are teleporting across the map - You can see it easier if I select them all when I simulate - basically they are navigating to different points (queue actors) in the game when one of them is practically teleported - I had to slow down time to 1/3 just to catch you - you can see it happening here

The BT in question - (the "Queue" state" is causing the problem

I know it's one of these tasks but I'm not sure why it appears to be ticking through this -

BTT AI Queuing Task -

On some of the Queue Actor blueprints, there are these pure functions that are being called but they had this NPC variable hooked up - (but not from the function input NPC variable) I'm switched them . (But i switched them as a means to try to fix this problem, so I'm not sure what to do now

[mint terrace]

@granite robin cmon

why

no idea what that connects to

ok i guess its capsule component but 😦

why are you moving the capsule component instead of the actor?

i see

[final trail]

my ai keep overlapping with each other even with collision enabled, any help is appreciated : )

[granite robin]

watch a video on collision channels - collision doesn't mean "stop overlapping"

[final trail]

i see

thanks for the advice

[final trail]

so i set up a channel and applied it to the ai and it still doesn't work

[mint terrace]

this original Q is suspect, overlap always happens when collision is enabled so what are you trying to do?

your options are no collision, analytics collision only (overlaps) or analytics + physics (overlap + hit)

[final trail]

Im trying to make it so when multiple drones are near each other, they will all find their own space all whilst still aiming at the player

But rn they’re just stacking on top of each other

[floral kettle]

Hi, I'm using GetRandomReachablePointInRadius node to teleport an AI unit around, but regardless of how large I make the radius it always seems to teleport somewhere close to the Origin. Any idea what might be causing this?

[granite robin]

Try hard coding in the origin to something you know and see what happens

Can someone recommend more information on behavior tree TASKS - there seems to be very little in depth/best practices that I can find

Like for example, how do you use one to update the blackboard key of the task without casting to the behavior tree

[misty wharf]

give it a blackboard key selector variable

make it instance ediable, and it'll show up in the BT editor and you can set it as one of the BB properties

[granite robin]

Thank you!

[final trail]

is using both blueprints and blend trees to make a ai move a mistake?

[misty wharf]

If it's an easy way for you to make it work, it seems fine to me

[final trail]

ok,thanks

i thought it would mess things up, down the road

[weary holly]

does anybody know a way to check if an blackboard variable has changed?

[mint terrace]

in what context

getting an event when blackboard changes is called "observing". You can have your blackboard decorators Observe the value so that they re-evaluate when the values change

[weary holly]

all good

[lyric flint]

are EQS too CPU intensive?

[misty wharf]

It depends on the query and your performance constraints

I use them for a number of things and they work perfectly fine

[shadow python]

What would be preferred architecture for bot player controller if player could control multiple pawns at same time like in RTS? I'm currently thinking on
a master AIController which will have player state and will know about owned pawns, will be spawned by GameMode::AddAIPlayer based on session details
a regular AIController for each unit that will be controlled
master controller will issue strategic orders to multiple owned units

does it look legit?

[misty wharf]

Seems reasonable

[olive crown]

Is there an easy way to know the distance an AI must path to get to a point? Im doing some EQS stuff and checking for the closest point, but a point on the other side of the wall is considered closest even if it means having to walk all the way around to get to it. Compared to a point that is in reality much closer in reality.

I found the "get path length" node but it warns you that it is expensive and Im not sure how to use it as is either way.

[pine steeple]

when you do a query for path, it always returns the length

[olive crown]

Ah, must have missed that. Thanks.

[storm zephyr]

hello, do nav link require to be on the nav mesh cell that its actor is in? if i move the offset from the nav link component of my actor it gets to a point that it disappears or doesn't go past a certain point in the nav mesh

[storm zephyr]

i'm having a problem where i have a big house with a nav mesh which has an elevator, but for enemies to get on the elevator and walk inside it i need to set the nav mesh to fully dynamic which kinda kills the cpu performance given the size of the nav mesh. What settings can i set so that each cell update doesn't cost so much, increase/decrease the cell size? the other alternative i was thinking was to use 2 nav meshes, the house one would be static and one for the elevator which would be dynamic. what do you recommend?

[ocean wren]

Make it dynamic and use navmesh invokers for the objects you want to path around?

Take a look at the open world terrain demo thingy with the boy and the kite they did.. that uses invokers for the deer

[storm zephyr]

@ocean wren sorry only saw your reply now, what do you mean path around? my goal is to only have the elevator area be dynamic so it doesn't cost too much to update. i don't know much about navmesh invokers, but how would they help me do that?

from what i read about them, they only create the nav mesh on actors with navmesh invokers, which reduces the size and complexity of the nav mesh, right? but if the enemies walk around the house with patrolling, won't the navmesh be a bit heavy still?

it appears to have a removal radius, so it might be enough to keep it light

i'll try it out, any other approach you would recommend besides that?

[flint trail]

is dynamic nav mesh a lot more expensive than static ? (when used on a mobile device)

[storm zephyr]

i would it will always be

static you don't need to regenerate

dynamic you have to keep checking what has changed

and depending on your geometry

it can get heavy

when you update

that's the problem i'm having

[flint trail]

I see, thanks

[granite robin]

Any simple fixes for this? there's plenty of nav mesh but RVO doesn't seem like a good idea - I guess I could make an event on the BT that fires if the capsule is colliding with another mesh with a prolong period and character is trying to move somewhere but I'm not sure

[safe sphinx]

So if you have 2 Nav meshes in your game.
Lets say one on the first floor of your apartment building and one on the third floor.

I notice that if you start your player on the first one

then the AI on the 2nd one doesn't see you when you get there

Its because your player character didn't register on the 2nd Nav mesh right?

Not sure but I think that is what the problem is

Is there a why to "register" your character as soon as he touches the 2nd Nav mesh?

It might also be because I duplicate the AI enemy

I should probably use two different models or maybe 2 sets of Behaviour trees and Black boards?

It might be because I destroyed the first enemy AI and both enemies are using the same Behaviour tree and Black board?

[safe sphinx]

Yeah seems like each AI needs its own player controller and behavior tree.
Now it works.

Can share the same blackboard though.

[storm zephyr]

@safe sphinx how did you use the 2 nav meshes? the AI uses both?

right now i'm only able to make it use one

[opal rain]

Hello, some days ago I asked for a possible solution for AI Perception sight with multiple actors. I tried to increase the traces per tick but it doesn't seem to work. Is there any workaround where I could use Sight sense with 30+ actors without some of them not responding?

[misty wharf]

What do your actors need to see? The player or something else?

[opal rain]

The player yes

With hearing sense they respond perfectly well, but not with sight

[misty wharf]

Have you set up the teams on the pawns so that the player is in its own team and the enemies are in their own?

[opal rain]

Not sure what do you mean by this, but the player is set as an StimuliSource

[misty wharf]

Right, so if you look in the options for the senses, you might notice it has options like "perceive hostiles" and "perceive friends"

[opal rain]

oh yes I have all of them checked

[misty wharf]

Right, so that makes them attempt to perceive every pawn you have, so for every pawn that's within their sight radius it needs to do a linetrace which is where most of the time goes

If you set up the team affiliations on the pawns so that only the player is counted as hostile and you change them to only perceive hostiles, they will only need to trace the player which should give you a significant performance boost

[opal rain]

how can I set a team affiliation?

[misty wharf]

C++, you need to implement IGenericTeamAgentInterface on the pawn classes

[opal rain]

oh, is that not exposed to bps?

[misty wharf]

unfortunately no

although what you have looks vaguely like UE5, not sure about that but I'd assume it might not be still

[opal rain]

okay thanks, will try to do that

its ue5 yes

[misty wharf]

you could try adding the interface from BP's I guess to see if it's available, but not sure if it is

[opal rain]

I can see the interface but it doesn't let me add it to my Ai controller, so I guess it's not exposed

[misty wharf]

iirc it needs to be on the pawn, not the controller

[opal rain]

oh okay, that worked

what should I do to set the team affiliation now?

[misty wharf]

you need to override GetGenericTeamId

and GetTeamAttitudeTowards

[storm zephyr]

@misty wharf you recommended the navigation invokers, and from my tests only pawns with that component will generate the navmesh. It seems to work fine, the problem with this is that my AI can investigate locations (sounds and sight), so if the navmesh is not generated there, he won't do anything. Is there a way to force him to go there even if there is no valid navmesh, because he will build it once the AI gets there?

[misty wharf]

That wasn't me :) I have never used them lol

[storm zephyr]

@misty wharf i meant @ocean wren xD

[marsh aspen]

hey guys, i've just encountered a strange problem. So i was playing with some NPC fight against a wolf. And all works pretty good except... when my playable character (who doesn't take part in the fight) is too far away, well everything is broken, it's a mix Behavior Tree and common BP, and i don't know why having my char far away (and not really that far) messes all up.

[ocean wren]

Bakadev: how about this as a workaround.. spawn an empty actor with a navmesh invoker at your investigation point 🙂

[ocean wren]

One simple fix is when they collide, you swap the locations of them. Personally I turned off rigid collisions for them all and did a Team Fortress 2 style force-seperation in the Detour movement component to keep them somewhat apart. (BTW: recommend using the detour movement rather than the RVO)

You can always do the position swap after a certain amount of time too.. I know of a few games that did that 🙂

I just prefer the visual quality of the TF2 style force thing. Leads to a nice squishyness to the personal space that mimics reality better to my eyes

And the force model can be balanced to allow the actors to get to their destination whilst sort of pushing each other in a more natural way. Because the forces in effect are a soft body simulation

[hearty niche]

if I know that the player is disconnected, is there any way of swapping the pawn control to a bot and vice versa when the user disconnects?

Kinda like how brawl stars deals with afk players

[misty wharf]

Sure. Just possess the player's pawn with an AI controller

[storm zephyr]

@ocean wren i thought about that, it's a bit hacky but i can try it

[magic jasper]

Anybody worked with commandable units and behaviour trees before? Looking for some ideas on how to design the interface between a given "command" and the behaviour tree.

Anyone who has looked into RTS' for example.

[granite robin]

Not a bad idea, thank you! For now I spawned a simple collision box right at the corners - the issue was each one of those crosswalk entrances/exit is a collision box - (basically two for each corner of a 4 way intersection) - the problem was the logic they were coming in sharply enough to trigger the OTHER crosswalk direction collision box (which will make them wait before going into the street) - the end result is that they were stopping before they really cleared the intersection - but I might take a look at what you are talking about but I've never used a Detour movement component before (in fact, I didn't even know what was a thing until you mentioned it

[magic jasper]

Anybody used the engines' HTN Planner plugin at all?

[hearty niche]

and what about that player controller? I want him to be able to rejoin and start from there. Also, be able to join a game where he can take over the control from thr bot. Kinda what the studio wants.

[misty wharf]

You'd need to have some method of identifying which player it is and which pawn it's associated with, and save this information somewhere when the player leaves

[glacial minnow]

hello everyone, why this empty?

[storm zephyr]

@ocean wren i tried but even with just the player with navigation invokers i still have hitches when generating the dynamic navmesh, what are the settings in the nav mesh that influence more the time it takes to regenerate? i assume that the less cells / titles we have the better, or is it the other way around?

[rotund sluice]

Could somebody tell me how to force my ai to move on spawn?

I have enum to set ai behaviour and blackboard on spawn and it does not work

If I would assign AI controller class before I spawn it then no problems.

But I need to assign controllers on spawn.

[safe sphinx]

I simply duplicated the first one and gave it a different name

Then I laced 2 AI characters one on each one

Works fine

For me what works a lot better is if each AI character has its own set of behavior tree, blackboard and player controller

With this config it works flawlessly

[storm zephyr]

when i use the 2 nav mesh he doesnt go inside the 2nd navmesh

[safe sphinx]

I dont use one big Nav mesh volume because I have areas on my map I dont want it to "fall"

No your AI ch cant move from the one nav mesh to the other

That is correct

[storm zephyr]

yeah that's what i wanted

[safe sphinx]

There is a way to do that I saw a tutorial on YT on how to "jump" over gaps in nav mesh

Google around I am sure there is a way to do that

[storm zephyr]

that's the navlink

[safe sphinx]

Aha yes

Yeah in my case I dont need that

So haven't tried that

[storm zephyr]

thanks anyway 🙂

[safe sphinx]

NP good luck 🙂

Post here if you find solution 🙂

[storm zephyr]

i've been looking at it and every move request seems to determine the best nav mesh

but it doesn't seem to be able to change mid move

and unless you disable one of the navmesh he will always pick the closest to his configuration (radius, height, etc)

[rotund sluice]

For anyone wondering I fixed this by adding delay on begin play, doing switch on enum, based on that I would assign ai controller and then would call "SpawnDefaultControler" (or something like that.

AI controller would set BT and BB

[cold trout]

is there any clever ways to breakpoint BehaviorTree tasks for particular instances of an AI?

using the DebugSelectedObject dropdown is great for CharacterBPs and ActorComponents

would love to be able to ensure an Actors AI controller would be the BT DebugSelected AI in the behavior tree editor

on begin

[hearty niche]

hmmm ok

[queen escarp]

are there some known games wich have used utility ai ?

[ocean wren]

Jambax: I've done squad command stuff. I created a squad member component that was on each squadmember. I created a squad actor to control the logic for them and added one per squad. I used the MessageEndpoint classes to communicate between the various squad members and the squad. I'd recommend doing the squad stuff as a message-based system because then you can feed test messages into the command stream and buffer and do other useful stuff.

So the overall commands are just messages sent from the squad actor. Obviously the logic on that actor can be quite varied, things like selecting the nearest squad member for an activity etc. You can always just use squad member ref's in the squad actor, I use that to allow for querying state. But the commands are always messages, with commands and acknowledgements. Allows for things like individual squad members acknowledging commands, or refusing them.

Squad actor has a BT for overall logic of the squad. Each squad member has its own BT, the command messages basically feed data into the squad member BB.

Thats the basic framework I'd suggest. I'd kind of prefer a shared blackboard method, but that's not supported in UE.

[mint terrace]

you should probably @ them tbh that was awhile ago

also cant you use Instance Synced to share some or all blackboard values of a given blackboard type with all instances that use it?

might not work for your use case, but it is "shared" i guess

[ocean wren]

its shared globally, not on specific agents.. so not really that useful

and BB's don't support arrays, so you can't easily just hive off values into arrays and leave them global

spinynormal: Have a look for Kevin Dill and other presentations from GDC, they'll talk about specific games that use utility

[misty wharf]

apparently a fairly typical pattern is to stick a uobject into the BB, and use it as a container for arrays and such

[flat linden]

Is it possible to change params in AI sense config in runtime from blueprints?

or from the cpp

[misty wharf]

Yes, from C++

[magic jasper]

The approach I'm taking atm is using an HFSM to manage overall state of the AI, then using BT's to do very small tasks. BT's have a lot of design flaws, not really sure why they're so popular.

Just a bit annoying that the engine has such a well-defined state machine toolset already, but only for animation rather than for more general-purpose use, like AI.

And yeah the blackboard sync thing is pretty limited as well. Can't use multiple blackboards per-AI instance either without a lot of custom code, which makes changing between BT's quite frustrating.

[pale bay]

how can I make the AI always "see" me

so they are always trying to find and attack me

ok thx

they all just bustle up on this wall even though theyre moving to me

[ocean wren]

BT's are more popular than FSM or HFSM because you don't have to explicitly code the transition. The transitions happen when the data changes, which is as it should be. Honestly there's not a huge difference in reality, although I've come across a lot of people treating BT's as though they are FSM anyway which is a bit daft.

BT's are also pretty extensible with stuff like utility approaches, because you can add utility based decisions into the conditions in the tree.

[pale bay]

why do they keep trying to go through walls? why arent they pathfinding to the doors? (the walls are "block all" collision, and can ever effect navigation is true)

[ocean wren]

Your wall isn't cutting the navmesh

you should see a darker green outline outside the wall if the wall was being seen by the navmesh

So they're likely just pathing through the wall

Are the walls set to static?

Have you rebuilt the navmesh?

[pale bay]

how do i rebuild the navmesh?

srry slow reply btw

[ocean wren]

its in the build menu at the top

[pale bay]

in this screen there fine

[ocean wren]

Yeah, but look at the difference between that image and the previous one

[pale bay]

ah yh found it 🙂

[ocean wren]

previous one the navmesh clearly intersects your walls

[pale bay]

so do i rebuild everytime theres a layout change?

[ocean wren]

Try switching the navmesh to dynamic and see if that changes things

if you go to the recastnavmesh actor there's a checkbox to make it dynamic

[pale bay]

thx

[ocean wren]

Usually I keep it dynamic, because then it'll rebuild as you edit the level

[pale bay]

oh nice

[ocean wren]

but if you're doing a mobile game, you'd probably want to make it non-dynamic once you have the level built.

[pale bay]

this one?

[ocean wren]

Yeah, looks right

[pale bay]

ive rebuilt and they still go to the wall

[ocean wren]

ok, so it looks like a setting on the wall meshes

[pale bay]

theyve got the navigation one checked

[ocean wren]

Are they set as static and not moveable?

[pale bay]

under collision?

[ocean wren]

No, on the actor itself

[pale bay]

theyre the starter content walls

[ocean wren]

Yeah, but are they set as static or moveable? I don't know if that's an issue, but its something to check

[pale bay]

im sorry im unsure how to check that

could you tell me?

[ocean wren]

its in the details panel when you select an object, just near the transform, I don't have the engine open so can't grab an image. its in the UE docs if you need to look it up.

[pale bay]

thx i will look now

yh i see it

its static

[ocean wren]

hmm, so its definitely not cutting the navmesh, so there's something on the walls.

[pale bay]

i tried with a different mesh

same issue

[ocean wren]

Might be useful to download the content examples and look at their setup and see how it differs from yours

[pale bay]

where can i find this?

[ocean wren]

its available through the launcher, its not under the marketplace tab weirdly.. but its off the learn part I think?

might be easier to find if you look via google

[pale bay]

ok thx man

[pale bay]

thx bro fixed it all just changed runtime generation to dynamic

[ocean wren]

Oh, so it wasn't rebuilding?

[pale bay]

yh

just flat out not working

[charred glade]

Is there a good way to get an AI to smoothly turn to look at something instead of manually rotating the actor?

[autumn roost]

you might be able to just tune the rotation rate in the AI character's movement component, but not 100% sure

[charred glade]

nvm there's a built in task for rotating to face a bb entry

[hollow stirrup]

How do I make my AI character rotate smoothly towards the target in this Task on the behaviour tree? It snaps directly to the target point.

[charred glade]

Try using this in your behaviour tree

Seems to do exactly what you're trying to do in your task

[hollow stirrup]

does nothing, my npc doesn't move after this

[charred glade]

What are you plugging into the blackboard key that it uses?

[hollow stirrup]

Target location, which is the vector of the patrol point. Trying to make my NPC go to patrol point, pause, rotate towards next patrol point, pause, move to next point

It rotates but it just snaps and faces the new point, I want it to slowly rotate towards it

[charred glade]

If you're just having it move from point A to Point B a simple move to with a wait inbetween would probably work better, since they should automatically rotate when they start moving to the next point, unless you want them to look at the new point before moving to it, otherwise im not sure what else to do to help you, the rotate to face bb entry task should work fine.

[hollow stirrup]

it just stays on rotate to BB, and doesn't move to the next task

this is what i have atm which works

[charred glade]

That's odd, not sure what to do to fix that, it usually finishes when the rotation is done, but im not sure what could cause it to fail to rotate.

[hollow stirrup]

Maybe it’s just designed to constantly face a target

[charred glade]

That isn't the case, im using it myself and it finished once it's done rotating

[hollow stirrup]

Hmmm

[cerulean walrus]

So I am placing some AI in my level and I have a two floor building, I placed the nav mesh just fine but when I place another nav mesh on the second floor it makes the first one unusable. Does anyone have any idea why or a way around this at all?

[mint terrace]

so technically you don't place the nav mesh. You place one or more nav mesh bounds volumes which tells the nav mesh generator where to generate the nav mesh

you wouldn't happen to be placing nav modifier volumes?

and in case you don't know, hit P in editor to visualize where the nav mesh gets generated

[quaint lintel]

why does setControlRotation in an AI controller not work? (or does it?)

[mint terrace]

it does

however, if you are setting it on character from within a controller, that's not right

[quaint lintel]

so I have to call it from the character?

[mint terrace]

why would you have the controller responsible for telling the character to tell the controller what it's control rotation is

[quaint lintel]

yeah, we made some wrong design decisions, but we learned from it

it's many systems combined (root motion, AI, ... and a non-engineer as animation programmer)

[mint terrace]

well if it isn't working then it's probably because the control rotation is being consumed while you change it

ie, you are responding to the control rotation when you are setting it

consider having the ai controller set the control rotation per tick to an expected value

and also consider just not doing this

[quaint lintel]

that's what I tried

[mint terrace]

is there someone else calling Set control rotation?

[quaint lintel]

not that I know

It did it when I set it not on tick, but only for one tick. Like it resets it after the tick function, but in the same tick

except the animation blueprint does it

nope

this is what I do on tick. The AIControlYaw is updated every 0.1 seconds

[mint terrace]

It did it when I set it not on tick, but only for one tick. Like it resets it after the tick function, but in the same tick
considering i dont know what "not on tick" means, i can only imagine you mean "when it changes", ie an event. If it resets after the event within the same tick, then yeah something is setting control rotation, and you cant just have two things setting control rotation in the same tick and expect that to work. Typically the PlayerController is set up to do this.

[quaint lintel]

hm, maybe the player controller internally? or some component of the AI controller?

[mint terrace]

if its player controller it will be your player controller blueprint unless you have a C++ base class for it, in which case, check there too

[quaint lintel]

it's an AI controller

[mint terrace]

if you dont have custom C++ stuff in your project (keep in mind some templates have it already for you) then just search project for SetControlRotation

ctrl+shift+F and dont forget it

[quaint lintel]

nope, nothing to be found

[mint terrace]

if you do have some custom C++ stuff, then search in your IDE for SetControlRotation 🙂

if nothing is setting control rotation other than your AI controller, then the value you set is the value you read, period, as long as you are setting it outside of where its consumed----- but honestly for rotation im not sure it even resets like MovementInput does for instance

[quaint lintel]

it's like the function call in tick is ignored completely

or rather, resets to 0

This one was set to true

[mint terrace]

oh. yeah

[quaint lintel]

well, very much thank you

[mint terrace]

i thought about these flags but forgot that theres even more of them than you ever expect

seems to always be the problem

[hollow stirrup]

Can someone help? What am I missing? This is in the state machine I want my NPC to do a 90 degree turn animation in place when speed is 0 and when the rotation is happening, but how do I call the rotation of the npc?

[alpine path]

@hollow stirrupAdvanced Locomotion System V4 is a good example how to implement it

[wraith anvil]

AI walk path is not working on maps that are loaded with OpenLevel but works fine on maps that are opened directly on the editor. any idea why? the nav mesh is not shown when it's not working

[wraith anvil]

i managed to fix it on 1 map by deleting the recast but can't repeat the fix on other maps, also only happens on the oldest of our maps

is this a bug?

feels like asset corruption

[desert prism]

Hi everyone. I'm working on setting up AI for a game that has 5-8 enemy types (they'll have different preferences of what to focus, and when), as well as 4 different bosses. Behavior trees seem fairly rigid in how they can be segmented/split up/organized, so i've been struggling to identify what aspects of logic need to go where. Does anyone know of any articles/guides/etc that teach these aspects? Everything I seem to find related to behavior trees and AI are all simple examples focusing on a single enemy or simplistic tasks. Thanks

[stiff gale]

Why my ai won't shoot the player while I'm up on a hill it will run toward me and then shoot.

[hollow stirrup]

is this some sort of pack i have to buy?

[timber cargo]

@stiff gale explain better

[stiff gale]

If I am standing on a hill within ai radius instead of ai shooting they come to the hill to shoot

If I go down it happens the same. Only if I’m standing on flat ground then the ai shoots from the radius

[timber cargo]

So basically the AI doesnt shoot until it gets to you and you want it to shoot even before it gets to you?

[hollow stirrup]

Why is this so difficult? All i want to do is play a turn in place animation when my npc rotates and theres 0 tutorials about this

[stiff gale]

If the ai is within 1000 redius it can shoot on flat ground but on hill it comes closer to shoot

[misty wharf]

Have you tried asking on #animation ? This channel is more about BT's and such

At least to me that seems more like an animation question but I could be mistaken

[hollow stirrup]

ok ill ask there

[timber cargo]

@stiff gale you compare their Z values to know if the player is on a hill

[ocean wren]

Korvax: Print out a vector from one to another and make sure your distance is what you think it is

remember, if they're on different Z values, then the length of the vector is longer

[timber cargo]

Then if its higher than a certain value you can tell your AI to move closer, the higher the value is the closer it move to the player

Or might as well use the vector length too

[ocean wren]

This is the kind of thing where AI debugging skills come into play. Just print out the values, or watch them in the blackboard

or use the visual logger

[stiff gale]

Ok thanks. Another question.

My ai won’t roam in 2 clients multiplayer mode or even 1 client . How can I debug in c++? I know how to debug in blueprints

[ocean wren]

look for "visual logger" in the UE docs, or the streams where they've shown it

or visual debugger.. can't remember which one they called it

[stiff gale]

I remember on screen UI that shows ai info.

[stiff gale]

So In 1 client, my BT gets stuck here. https://gyazo.com/2766fbc03b6165aaab2b006b55899ebc

[stiff gale]

anybody knows why it's getting stuck in oneplace

[misty wharf]

Are you sure it's just not failing and never advancing to the next one?

[stiff gale]

works fine in standalone

[misty wharf]

if it's MP you probably shouldn't be running BT's on client anyway

[stiff gale]

what do you mean? I should test it in 2 players dedicated server option

[misty wharf]

the server is the one that should be running behavior trees, the clients aren't authoritative on them afaik

but I'm not really a #multiplayer expert so not 100% sure

[stiff gale]

Alright moving to the multiplayer channel

thanks

[glacial minnow]

what is cooldawn?

[misty wharf]

It's a timeout, waiting a certain period of time before allowing something to activate again

[gusty fog]

Is it possible to implement a custom UBTDecorator (not UBTDecorator_BlackboardBase) that is able to abort self? It seems that nodes are self-abortable only if they inherit from UBTDecorator_BlackboardBase (because of UBTDecorator_BlackboardBase::OnBlackboardKeyValueChange).

[stiff gale]

Anybody knows what's wrong here?

  generator[0]: 0.24 ms (items:516) (EnvQueryGenerator_SimpleGrid_0)
    test[0]: 0.03 ms (items:516) (EnvQueryTest_Distance_0)
    test[1]: 0.04 ms (items:516) (EnvQueryTest_Distance_1)
LogEQS: Warning: Finished query EQS_FindHidingSpot_SingleResult over execution time warning. Total Execution Time: 27.11 ms
  generator[0]: 0.24 ms (items:516) (EnvQueryGenerator_SimpleGrid_0)
    test[0]: 0.03 ms (items:516) (EnvQueryTest_Distance_0)
    test[1]: 0.04 ms (items:516) (EnvQueryTest_Distance_1)```

[misty wharf]

Probably nothing

It just took longer than the default execution speed warning is for it, whatever that value is set to by default

So if it taking 27ms is a problem, you may need to find some way of optimizing the query

[stiff gale]

It felt like a pause when it happened. That's why

Maybe it was something else

[misty wharf]

Well if it always gives that warning when the query runs, then your query most likely does take 27ms and is slow

Without knowing what your query does and its parameters it's pretty hard to say though

[stiff gale]

What do you think of this? https://gyazo.com/ceffed273824d36e2bfc7f7599a55fb8

https://gyazo.com/b7341bd7d9c251f745c73a9a8d74af6c

[stiff gale]

That everything. So what do you think? https://gyazo.com/57fa2bc3e0e362081ec60d42e909cd1f

[misty wharf]

I don't know, it could be that the traces are taking a while. You could try reducing grid size or increase spacing to see if it has any effect

[lyric flint]

I need to create 2d top down ai, how much different would it be from 3D?

I’m making a pixelated game

[misty wharf]

Not at all.

The difference would mostly just be in how it moves or perceives things around it

[rigid tulip]

Hi, I added multiple agent types in the project types, how do I assign a characterbp to an agent type?

[cold trout]

Someone correct me if I'm wrong, but think you just set character's nav agent settings to same as you layed out for the agent

[mint terrace]

seems reasonable, I have t done multiple agent types but I'm sure there's a property for it

[spark verge]

[Help] can anyone tell a c++ newbie how to get a hold of the navigation system in version 4.26.. or anywhere around then

is it v1?

is that something taht's deprecated?

do i do GetCurrent(MyWorld)

[mint terrace]

GetWorld()->GetNavigationSystem()

V1 is not deprecated

[spark verge]

awesome thank you

i also found that NavigationSystemV1::GetCurrent(GetWorld()) works

do I need to include AIModule in my public dependencies?

if i wanna do behavior tree stuff in c++

[granite robin]

Confirming, this is how I would stop an AI from going into certain nav areas right? use nav filter class and exclude the areas - I want them to behave as null essentially (I need the nav meshes for my teleporter to work in VR)

[subtle shoal]

Got a quick ?

if I'm using a "RunBehavior" node to have sub trees within a main behavior tree... is there a way to pass in data, much like how tasks can have "instance editable" flags so you can tweak data on used tasks?

[misty wharf]

@subtle shoal you would need to put that data into the blackboard

[subtle shoal]

yeah.... kinda figured

I bypassed the issue, so it's all good

[opal rain]

Hello, I'm trying to make my AI jump forward certain obstacles on the map specified with a tag, I have a sphere trace to detect those. This works fine, however when it comes to the jump feels incosistent and different every time. Is there a better way to do this?

I also tried the "SuggestProjectileVelocity" to make the arc but it's giving me 0 toss velocity

[quaint lintel]

I have a root motion NPC and want it to walk off a ledge. However, it refuses to walk to the corner and further, it just turns around and walks in a circle. I used a NavLink Proxy so it can at least find a path. Any ideas?

[narrow mason]

This is a long shot but I think there a setting in the character defaults that allows you to choose if a character can walk off ledges. Try ticking it and see if it works.

[quaint lintel]

I looked there and tried that. I guess it's the weird locomotion system we have. We don't use the real movement modes but the colleague implemented a custom one which is completely independent

I really wish we had some senior and enough time to actually develop stuff, including quick prototypes

[mint terrace]

well there's the job boards for that. hard to help if it's all custom

[olive pond]

How can I disable apostrophe hotkey toggling the AI debug display in development build?

[rocky perch]

Hi guys,
How can we make AI character which guides the main character. For example, in uncharted 4 Nathan follows his brother Sam.

In the game we generally see the side characters goes before main character and they kinda guide the main character. How can we create that in unreal engine?

[olive pond]

@rocky perch yes. Not necessarily easy but yes.

[rocky perch]

Could you please share any tutorials if there are please. I have searched all over but there are tutorial about ai following the main character but not AI guiding the Main character. I'm still a starter please help

[olive pond]

I think you only need it to walk using the navmesh to all the mission objectives in sequence but wait for the player to catch up if he falls behind and wait at each objective until that objective is completed

This can be done by creating am array of locations or actors that are the objectives and have an integer variable that increases when an objective is completed. Then the AI. Behavior tree just chooses from the array at that index whenever it is leading the character to the next objective and movetolocation or move to actor using the array entry at that index

I am making this up as I go because I never did it before but that it my idea of how to do it.

[quaint lintel]

If you want some specific path and animations and sound you could use a sequence for each section. Otherwise just let him walk to the point, but wait if the distance to the player is too large.

[ocean wren]

Usually, you'd setup a path for your AI to follow and only make them follow to the next node when the player is within visible sight and a given radius of the AI and actually looking at them (i.e. the angle between the view vector of the player and the AI's position is something small).

[violet sand]

Hello, I have a question - I have successfully added sight and hearing senses and detection by affiliation. Now I'd like to add logic so that if AI detects an enemy, it broadcasts the target to its nearby teammates. What is the best way to do it?

I was looking at "team sense config" but the documentation is very scarce on what it does and how to use it

[ocean wren]

I used a message endpoint and broadcast it via a message to squadmates that way. Would recommend.

Ideally you'd have a shared blackboard, but UE doesn't support that

[violet sand]

Thanks, I'll try that

But the "team sense" still bothers me, what is the point of it?

In what use-case should it be used

[ocean wren]

Not sure I remember that. I know there was some aspect of filtering out different senses so that you could for example only sense firing from other teams

The point was that you had to have some value on the sense event to determine if it was appropriate to sense for the given entity

Having said that, it might be some new functionality, although I doubt it 🙂

Oh, no, it looks like they added new event types for this

https://forums.unrealengine.com/t/problem-with-using-aiperceptions-team-sense/104778/4

So its basically like any of the other sense events, but with a different payload

And some hoops to jump through to get working it seems 🙂

Honestly, I prefer my MessageEndpoint 🙂 at least it was a fun system to use and had obvious examples in the codebase to crib off

Basically a pub/sub event system

Honestly, you could reimplement the sense system with MessageEndpoint and save yourself a ton of hassle 🙂

[violet sand]

Thanks, I'll check out the messages 🙂

[narrow mason]

you can always implement a custom ai sense. I did that for animal herds in my project

Takes a little bit of work to setup but you have the power to customize all you want

[misty wharf]

Interesting idea, I might give that a try at some point :) I have an AI sight based system where NPC's perceive a bunch of things in the world, but there can be quite a lot of things for them to see so it could potentially generate a lot of linetraces which is not very great for perf

[narrow mason]

Exactly. The team sense was a bit unsuitable for my purposes since there is a herd leader and some other features.

[olive pond]

If the level is not too complex, you can tell if the player is fallimg behind by whether their distance to the objective is much large than the AI pawn's

But this is a straight line measure. If there are lots of turns in the path or adjacent locations along the way with a barrier between them, then you may need to base the distance on the pathfinding distance which I dont know how to do yet.

[neon carbon]

I have an actor with a navigational invoker, when i place it in my level landscape with tile generation and removal radius above 5000 or so, i start getting lag spikes when i move around the level, both in creation and PIE mode, why?

[pine hamlet]

Heya guys
Im new to unreal and i want to make a duck to follow me around tho the movement doesnt seem to work

Any1 who wants to take a look?

[misty wharf]

you don't need to ask, just post the relevant info and if anyone has any idea they'll help you out

[glossy spire]

Anyone stumble across a method for perfectly serializing AI behavior?

I'm very close to abandoning UEs behavior trees...

[storm sail]

Look into pawnsensing if you are starting out new
https://www.youtube.com/watch?v=59INcP9Vsmo

[storm sail]

You can just not use Behaviortree and do everything inside of blueprints. Which is what I do

Do you have a navmeshbounds set up?

Your dragged it into the map or spawned it?

There are ways to only generate navigable areas when needed, but AI's have to have a nav volume yeah. You should try dragging it into the map and see if it works in that area

if it still doesn't do anything then at least you know it's a problem with your logic

[glossy spire]

@storm sail How do you handle long sequential abilities?

I'm researching a GOAP style system, but I've been struggling with how to convert some of my more complex ability BTs

[storm sail]

I use GAS for all my AI abilities so I've never taken a crack at managing multiple custom systems

[glossy spire]

Lets say I want a behavior where a character walks over to a boulder, looks at their target, then throws it. It involves several waits, some movement, targeting, etc. Would you have all that inside a single gameplay ability?

I'm not really familiar with them

[storm sail]

No, only the part where he looks at his target and then throws it. However if you can put whatever you want inside of a Gameplay Ability

I usuaully do sort of a rotation system

[glossy spire]

That makes sense

[storm sail]

Where everything repeats in it's own loop. For example.

Find player -> Decide Action -> Move -> Is actor in range -> Yes? Use Ability -> No? -> Restart rotation

AImoveto with acceptable radius is very handy

[glossy spire]

Sorry if I'm being nosy, but how do you go about picking which ability to use?

[storm sail]

I named them in a map
Poke - 0
Burst - 1
CC - 2
Dash - 3
Ultimate - 4

0 - 4 are how the abilities are activated

So my AI Will decide to use poke ability if it's not on cooldown, and if the target has too much health

Dash abilities are saved for when opponent leaves acceptable radius with low health, or to escape

etc.

[glossy spire]

Cool, thats pretty straight forward

Thanks, that seems pretty interesting

[storm sail]

https://gyazo.com/62d449ba25a839fd68cf824715b08fe8

Quick example

https://gyazo.com/6bfc959cfe708e34b7032c007d32905b

@glossy spire if you have any questions you can let me know

Don't sleep on Movement result, Aimoveto can fail very often in a map that wasn't set up the best

[simple crest]

doing an entire AI in blueprint code (ok ok it could be fine for some simpler AI)

[lyric flint]

I assume this is asked multiple times a day, but if I've got a very complex AI with a wide range of potential behaviors I should be using multiple trees, right? What are subtrees would those be something I should consider?

I've done simple AI with simple behaviors in the past but now I've got a complex AI that has a very large pool of behaviors

[glossy spire]

@lyric flint Right now I have a lot of trees. I use a couple of generic ones for top level concepts like Combat or Patrolling, as well as smaller trees for reused behaviors. Then I insert dynamic sub trees for individual's special abilities.

[cinder cedar]

Hey guys, I have a **difficult **design question I hope somebody can advice me on.
The flow of my game is controlled by 2 systems - a package spawning system and a package proccessing system(with conditions for valid packages, ex. "Country x is forbidden"). The game progresses in days - depending on the day and the actions of the player, different packages and conditions are picked to be spawned.

I'm planning to create an omnipotent AI Director to control these two systems. Similiar to Alien: Isolation or L4D2. However, I'm conflicted whether it should be a simple class inhereting from UObject and stored in the Game Instance or a full fledged AI using trees and blackboards spawned inside the level. I'm not completely sure what the pros and cons of each method are.

[mint terrace]

if you go the non-BT route, consider world subsystems instead of a simple UObject

I would probably aim for BT, but it really depends

[misty wharf]

I think it depends on what kind of logic it would have

BT's are quite good for sequential logic

[cinder cedar]

I didn't know about World Subsystems, I have research that but it sounds pretty nice

[mint terrace]

yeah its great because they have the same lifecycle as UWorld / GameMode / GameState etc

and they have world reference, so no need to pass in a world reference to access gameplaystatics etc

but if you can express it in behavior tree, its probably better to

[cinder cedar]

It should make decisions and "direct" the other systems based on player behaviour and current game progress. It may possibly act as a sender and/or courier between some DataAssets/DataTables and the other systems, meaning it will get data from them and decide(based on past player behaviour and current game progress) what to send to the gameplay systems.

[cinder cedar]

I'm leaning towards that as well and I think the blackboard may also be very useful

[mint terrace]

youll need blackboard if you use behaviortree

well-- ok technically you dont need it but it would be kind of silly not to use it and would basically lock you out of the core task nodes

[misty wharf]

tbh if you want a BT it's probably easiest to just base it on AIController :)

iirc there's a few random things where it doesn't seem to work so well if it's not an AIC

I think we were discussing using BT's with non-AICs here at one point and there was some weirdness with it, I looked at the code out of curiosity and it has hardcoded casts to aicontroller

[mint terrace]

yeah

luckily you can spawn AIControllers at will and i believe they work fine when theres no actual pawn possessed by them

[misty wharf]

Yeah, you can start the bt from the aicontroller from anywhere

[cinder cedar]

oh, you can? That would be amazing actually, pretty much solves the dilemma I had

[mint terrace]

yeah it should be fine, you just cant Get Controlled Pawn

and tasks that depend on the controlled pawn wont actually work, like Move To etc

but thats not relevant, here youd want to define your own BT tasks

[cinder cedar]

Yea, that shouldn't be a problem, it will be a "logic-only" AI with no physical body

I guess I've made the decision then, it's gonna be a BT AI. Thanks for the help guys and thanks for that World Subsystems hint, will definetly research and use them in the future.

[queen fjord]

I have set up several nav meshes in my large map and gave the AI characters nav invokes but I noticed that after a certain distance (but still within the nav mesh) the AI will stop following me. Any ideas why? I am using the AI provided in the Dynamic Combat System.

[unborn jungle]

When doing EQS tests such as generate items around a context or distance to a context, does it pretty much not matter if you use an actor as a context or a location as a context?

Would providing an actor just get the location of the root comp anyway?

[deep pulsar]

Is there any effective way to add multiple sight configs to a single perception component? I added two but only one of them seems to work.

[misty wharf]

@deep pulsar afaik no. I have two perception components for this purpose, not sure if it's ideal but it does the job at least for time being

[simple crest]

multiple sight? narrow eyes in both front and back of head?

TIL there are not enough games with two headed dragon enemies

[queen fjord]

Cool concept but that would require very custom animation.

[celest python]

It always skipping the sequence with this log:
> skip: already has request with higher priority
What does that mean?

TargetPlayer is set and valid, yet its looping root node instead of that sequence

[lyric flint]

How can I abort task with condition

I have custom move to component and I want to abort this task if ai state changes

[buoyant geyser]

LogNavigation: Error: Navmesh bounds are too large! Limiting requested tiles count (1627208) to: (1048576) what tiles are not being produced when you get this?...

looking at the tile bounds view at least I can see tiles in all four corners of my navmesh

[unborn jungle]

What does "Item" mean in respect to EQS?

Querier is the thing that is querying, context is the thing that is generating points around it but what is EnvQueryContext_Item?

The .cpp file for it is blank

[misty wharf]

afaik items are the possible results for it

eg. if you're generating points, each point is an item

[unborn jungle]

Ah that makes sense thanks

[misty wharf]

but I never really understood how the item context would even be used

[unborn jungle]

So if generating a grid, each circle is an item

[misty wharf]

Yeah

[unborn jungle]

It's useful in this case when doing dot tests

As the line is from the item to the context

But it seems the other tests automatically just work from the item...

Like traces etc.

You don't need to specify

[misty wharf]

Yeah, but if you were to use the item as the context, how does that even work :)

then it would be item to context (item)

[unborn jungle]

Yeah it's confusing

[misty wharf]

so it would be to itself? or would it compare to all the other items 🤔

[unborn jungle]

Also for easy debugging is it common to make a bool in each context that can sample non runtime actors for when you are testing EQS's in the editor?

For example rather than the AI controller getting a valid enemy, just iterating and providing the first character in the world?

Seems to work nicely since the contexts are just uobjects

[misty wharf]

You could probably just have a context that returns something useful for testing purposes and temporarily use that

[unborn jungle]

I was doing that but it's really messy

If you have many tests each with lots of contexts

It's easy to miss one

[misty wharf]

Ah, yeah true

[unborn jungle]

And accidentally leave a test context

So this way it's either all debug or all not

What would be even cooler is if it did it automatically depending on whether the EQS is called at runtime or in editor

I'm sure there's a condition for this, would make life easy

[misty wharf]

heh

yeah I think there's a way to tell if it's in play mode or no, but not sure off the top of my head

thankfully it hasn't been a big problem, most of my contexts work pretty well with the EQS testing pawn

[unborn jungle]

Are you mainly providing non runtime contexts?

Like not a specific enemy or something?

[misty wharf]

I have some contexts that provide specific things, but it seems to work even in editor as long as I place that thing into the level

[unborn jungle]

Ah nice

Most of mine are like AIController->GetBestEnemy

But there's no enemy until runtime

[misty wharf]

You can also do stuff like go into play mode, then detach and mess with the testing pawn and that should work as well

[unborn jungle]

Yeah just can be trickier to set things up and can take time

Need to improve the speed at which I can get into a test scenario

[misty wharf]

I have commands in cheat manager to spawn stuff in to help test stuff

[unborn jungle]

Need to do stuff like that

Good to know you can see the testing pawn at runtime

EQS is so cool!

[misty wharf]

a testing specific map with areas set up for certain things could also be a good idea

[glacial sapphire]

Hey .I'm studying AI recently, but I don't find good examples. Can anyone send me examples of AI you guys did?
I don't know how I do certain things in AI, and even if I have an idea, I don't know if it's right.

[lyric flint]

I am trying to make an ai car can anyone help how can I do that

like I tried using spline but the speed was not good as I wish

[deft pumice]

Hey I am looking for a tutorial on how to make a plane like AI

[torn hemlock]

have you tried searching youtube?

[deft pumice]

Well yes and I did find some examples of flying AI. But they are all rather floating instead of flying, I was looking for examples that incorporate proper flying

[deft pumice]

https://youtu.be/-vvnyaIl7Gw like I want something to chase after me while fly around like this, disregard animations, just placeholders for now

[lyric flint]

u can try fly AI

https://forums.unrealengine.com/t/updated-5-16-a-i-templates-bot-car-flying-ai/8475

[lyric flint]

I did not try may be it can help take a look

[split badger]

I set a Blackboard value as vector, and the vector printed as string looks fine. But when I print the vector from get blackboard value as vector with the same key afterwards, it is a completly different vector. I am a starter and cant get behind it why this is the case (using UE5 in case thats a bug)

[misty wharf]

Are you sure the value you're storing is the value you think you are storing?

It looks like you're doing additon on a variable so the value of new var 0 could differ and thus give you a different result than you expect

[split badger]

u mean that new var 0 changed between the first "print string" and the sceond one? I checked to make sure, and added a third "print string" which printing he new var 0 bevtor out, and new var 0 looks good.

In this case the wanted vectors looks like "300, 180, 80", but the vector value from the BB_Vector_Key_0 looks like "123123445123423451234123423541234123,12323423451324243512341231234,123412342351352134" something like that XD

[misty wharf]

That's definitely pretty weird 🤔 Try printing new var 0 and then the BB key value? Just to be sure

Also note that sometimes with floating point numbers (which vectors use), you may get a lot of fractionals so you might get a number like 300.1238712378 which ends up looking weird but isn't

[misty wharf]

Woah

lol

Yeah that looks pretty fucky, I've never seen that in UE4

Might be worth asking on #ue5-general just to see if it's some weird thing with that

[split badger]

XD thx, maybe i will try it in UE4 again and see what it looks like there

[misty wharf]

Hmm actually the one thing that comes to mind is... have you actually set that BB key variable to a vector BB value?

If you've set it to something that's not a vector... who knows what would happen. I've never tried it but I feel like it could behave very erraticly

[misty wharf]

Yeah but what are the BB values you've assigned into them in the BT?

[split badger]

mhm ...

this one?

maybe thats the problem then cause i don't know about what you are talking now XD

[misty wharf]

lol yeah that probably is the problem

That's a screenshot from your behavior tree when you selected this particular node?

[split badger]

yes

but i can nonly select actor key there :/

i mean i can only select selfactor in that drop down menu

[misty wharf]

Does your BB actually have vector properties defined in it? And have you selected the correct BB?

[split badger]

the BB should be selected since i copied how to do it from a tutorial, but on the vector properties, i have no idea

[misty wharf]

Well you need to open the BB and add some vector properties into it

It sounds like you don't have anything else than SelfActor defined in it

[split badger]

yes

I added vectors as keys, 2 (i only use 2 blackboard keys to set vectors) with random name and 2 with the exact name as the key names in the task for the BB-keys, doesn't work... I will try to find out how to do this, i am just confused why it worked in the tutorial since he didnt do that stuff in his vid

[misty wharf]

It definitely should allow you to select those

[split badger]

ahhh, now it made a click sound in my brain XD

thanks a lot, you fixed it ❤️

[misty wharf]

nice :)

[rigid tulip]

What happens if I connect multiple "Generate" to the root node in EQS?

[fast dagger]

hey guys i wanted to have a bool if my ai should strafe or not but it cancels the entire operation if its not set. How do i make it keep running that same function instead of it aborting everything?

[random jay]

I am using the blueprint-base bttask node and I am trying to use the DelayTask.

For some reason "finished" is never executing (this is occuring with other tasks aswell).

Does anyone know what the cause could be?

[queen escarp]

to create something like an ai commander someone would use event dispatcher and delagtes to communicate between npcs and the commander right ? or is there a better way to share data between actors ?

[lyric flint]

Try add a value to the time

[ocean wren]

If I remember rightly, it evaluates left to right and takes the first one. So the right can be considered a fallback if the left one fails to generate anything.

spinynormal: A better way would be to rebuild the blackboard and BT system to support multiple BB's and have one of them shared between agents in a squad etc. Normally blackboards are just dumps of data shared between agents. UE has some very weird "optimization" thinking that I don't really agree with. So that would be my "correct" way of doing it. If I had time to care about that 🙂

BB and BT etc are just components. So I suspect this is relatively do-able as work, but it would never be adopted by Epic so has like Zero chance of ever happening 🙂

[rigid tulip]

Perfect. Thank you

[stiff gale]

So I have placed nav mesh and enabled Gen Nav Mes Only Around Invokers.

I added invokers to my AI only.

If I place the AI manually then AI can moves around but if I spawn using a spawner it won't

It works when I enable Runtime Gen to Dynamic.

[frigid glade]

Do you guys know of a tutorial to make physic based enemys? I want headcrab like enemies for my VR Game that I can push away with my Sword

[hidden bloom]

I want to use MoveTo in a behaviour tree, for enemies in a level that is just empty space with a few spheres. How do I get MoveTo to work?

[misty wharf]

@hidden bloom MoveTo uses navigation, it doesn't really look like it would work for what you're trying to do

[hidden bloom]

Yeah I figured that. Is there a way to force navigation? Not expecting anything to move z-axis wise

[misty wharf]

You need a navmesh for it to work

If you want to move them using some other method you can just create a custom BT task for moving them

[hidden bloom]

That's possible, though navmesh would probably be able to handle any objects in the way. Is there not a way I can get a navmesh for what I want?

Do I need to make an invisible floor despite the pawn being floaty?

[misty wharf]

Yeah, I think an invisible floor would work because it needs something to generate the navmesh on

[hidden bloom]

Can't get it to work. I'll just do the custom BT task way and hope I can figure out a way for it to avoid obstacles

Thanks for your help anyway @misty wharf

[misty wharf]

Odd, I think if you have a floating movement component or whatever it's called that should be compatible with it. It could just be a problem with the navmesh not being generated proper or something

[hidden bloom]

Or whatever I'm doing isn't working at all.

Can't even get floating pawn movement to work

It executes but movement input is doing nothing it seems

And the movement input vector is updating according to the player's position

Here's the custom task. I had string prints at the end before the Finish Execute and it was being successful and giving different vectors depending on where the player was.

Okay it's not even working if I try to do a basic movement input in the tick of the pawn. What is going on..

Okay I got it to work after re-making the floating pawn movement component. Maybe something to do with nav mesh messed it up

[hidden bloom]

It broke again, but I know why it's broken. It's something to do with how I'm setting or getting the TargetActor key, as it works when the cast above fails

@misty wharfDo you happen to know what I'm doing wrong?

This is what's in the 'get player'

Would it just be easier if I calculated the direction vector in the 'get player' and parse that instead?

[misty wharf]

Uhm it's a bit hard to say

I would try using draw debug sphere or something to visualize where it's trying to move

and dump some debug strings for the values that you're sending into the movement

I'm not sure if the direction calcs are correct so it might help figure out what's up

[hidden bloom]

I figured out what was wrong in my blueprint, I somehow had the player and the AI pawn muddled up

The blueprint above should work, I just somehow made alterations since that got the actors confused

¯_(ツ)_/¯

[misty wharf]

heh

[torn hemlock]

I'm slamming my head against the desk rn. I have a ai controller that I want to link to a character pawn bp. For some reason, any ai controller I create isn't selectable in the list. It shows up, but when you click it it doesn't do anything. All default controllers work, but none I create do. After testing, i found that no pawn will accpet any ai controller I create in the project. Am i missing something obvious, or is it the engines fault?

[misty wharf]

In the AI Controller Class dropdown you mean?

If so, do your AI controllers actually inherit from AI Controller or something else?

[torn hemlock]

it is the dropdown

let me check

it would apear so

the parent class in the top right is AIController

[misty wharf]

Strange, it should work... this isn't on UE5 is it?

[torn hemlock]

nope

that why im dying inside

im going to try making a new project and seeing if it works

[misty wharf]

If you just create a new bp and inherit it from AI controller and change nothing does it show up then?

Or

if you select one of your controllers in the content browser

[torn hemlock]

it shows up, its just not selectable

[misty wharf]

and then click the <- icon

does that work?

[torn hemlock]

ive tried both

neither select it

[misty wharf]

Wait so it shows up in the list but if you click it it won't select?

Oh wait that's what you said in your first message

lol

[torn hemlock]

ye

[misty wharf]

The only thing I can think of that would override those is a construction script 🤔

[torn hemlock]

a construction script in the pawn im trying to assign it too?

[misty wharf]

Yeah

[torn hemlock]

how would that be done

my brain isnt quite there

[misty wharf]

Well if you haven't added a construction script into it then that can't be it

it would be in the blueprint's construction script tab

[torn hemlock]

yeah

it works in a new project so its just that one

[misty wharf]

Weird.. is it behaving like that for all pawns or just one kind?

[torn hemlock]

all that ive tested

[misty wharf]

well I'm out of ideas... might be worth checking if the output log is showing any errors or such when loading it I guess but that's all I can think of :D

[torn hemlock]

sure, thx for helping

im gonna try cloning it, see if that changes anything because its just the one project

duplicating the project didn't work, i'm very sad

[misty wharf]

the files aren't on write-protected are they?

I mean that's a pretty random thing but...

:D

[lyric flint]

https://www.youtube.com/watch?v=zNJEvAGiw7w&list=PL4G2bSPE_8ukuajpXPlAE47Yez7EAyKMu

I followed this video but at the end like in this player moving around in mine nothing changes

what can be the reason

[torn hemlock]

how would you find that out? just in case

[misty wharf]

Right click the file in explorer and choose properties

[torn hemlock]

nope

crap man

[misty wharf]

Maybe someone on #ue4-general would have an idea since this is a more general issue at this point than AI and there's more folks reading that channel

[bronze hill]

i'm following the exact guy, only i'm on the part 12 or sum

plenty of reasons tbh

have you set up the ai controller?

or tried debugging it?

[bronze hill]

I'm trying to finish my AI and it was working sort of fine until today something went horribly wrong, i'm trying to set it so that it will chase the player on sight, or go and checkout footsteps sounds when the player isnt in sight, but i'm having some trouble with it, can someone help me out?

[long stratus]

Hey so I have a friendly AI that is my companion. Recently I changed the Pawn class that I was using because I decided to change the character. I am using the same AI controller. The AI perception works perfectly fine with the old pawn but not with the new pawn. Does anybody have any ideas why this could be?

[autumn ibex]

I have a Blueprint Task like so, is it worth converting this to C++ to improve performance? Or should I just stick to C++ for the really complicated tasks.

[hidden bloom]

Pawn avoidance with geometry and other pawns. How can I do that?

[bronze hill]

wym with geometry?

[hidden bloom]

If a mesh is in the way

[bronze hill]

eqs?

i think you can set up a pawn to have eqs and stay away from another pawn

but eqs even after years it's still listed as "experimental" so save a lot hahaha

[hidden bloom]

Oh boy that sounds fun

[bronze hill]

i think there is a tutorial

hold on

[hidden bloom]

With EQS or with saving? 😅

Already found this https://docs.unrealengine.com/4.26/en-US/InteractiveExperiences/ArtificialIntelligence/EQS/

[bronze hill]

the tutorial i know tho it's about using eqs to hide behind objects

https://www.youtube.com/watch?v=lMx2JKY8HnM

[hidden bloom]

Yeah, maybe I shouldn't use this

[bronze hill]

it's been there since ages

usually it works, just have to be careful when you do custom stuff with it

then it might give issues

[hidden bloom]

Alright, I'll take a look. Thanks 👍

[bronze hill]

np

the same guy has a tutorial with how to set up ai to take cover behind objects away from the player if u need it

[plush meadow]

I have a huge problem in my game where the AI keeps shooting at my player even after it dies. How do I stop the AI from seeing me after I die?

im following a lecture and they dont seem to ever fix this problem, and I've been stuck on this for over 8 hours

[bronze hill]

use a blackboard variable to store the player health and if it's equal or below 0 then have the ai do something else?

[plush meadow]

how would I check player's health in a blackboard variable? sorry im new to AI and I use c++ so im not really sure how to get those values from different classed and check them

I have an IsDead boolean in my health class

but i cant find a way to access it through BTTask classes

[bronze hill]

oof

i know c++

but never used with unreal

[plush meadow]

could you maybe explain how thats done through behavior trees/blackboard and I could try to implement that in c++?

or however else its done in the engine

[bronze hill]

simply you would probably store the health in your player character

[plush meadow]

yep

[bronze hill]

from there you can call the blackboard

use the node "set value as (whatever type here)"

in your case either float or int i guess

make name node so that you can name the blackboard variable

and another node with the value, where you would hook up the player health

[plush meadow]

can a boolean be used? since i already have an IsDead boolean to check if the player is dead

[bronze hill]

yep that too

you can just put the boolean type and set the blackboard boolean to have the same value as your isDead boolean

from there you can use that in the tasks and decorators of the behaviour tree

where you can add a decorator on your sequence node so that a certain sequence or selector is run only until playerIsDead is false, then do something else once it's dead

[plush meadow]

alright sounds good thank you

now all I need to figure out is how to get my isdead value from player class and pass it onto the blackboard class

[bronze hill]

Good luck

Pretty sure you can find some tutorials on yt about it

[hidden bloom]

Pretty easily. A basic AI tutorial using blackboard will tell you how keys work

In the task blueprint, you make a public variable of type blackboard key selector, and from there you use set blackboard value as boolean on it. I think it's called that anyway

You'll need to make a key on the blackboard too, and then in the task details on the blackboard set the variable to that key

That basically links the key and variable together while the task runs

[plush meadow]

i really appreciate the help, but im a newbie in the engine itself, let alone the ai, and I have only worked with c++ because of a course. However, i have managed to link the isdead boolean to the key i made for blackboard, but now i dont know how to make it so when it's false, it goes into the next task in selector of behavior tree

[lyric flint]

yes I have set up

[plush meadow]

how do I make this selector move on from the wait 2s?

it keeps repeating it

[tawdry zephyr]

Has anyone built a truly good multi-threaded Utility AI solution thats available or do I need to build it myself?

[ocean wren]

Abtin: it keeps repeating it because the conditions of the tree to the left in the selector cause it to fail. Remember the selector selects the leftmost non-failing tree to execute. So those CanSeePlayer and IsPlayerAlive things are causing the leftmost tree to not execute, then your second tree the IsPlayerAlive is failing, so its going to the wait node.

Vaei: You don't need multithreading for it. And I believe Tom Looman did a C++ implementation of one

[hidden bloom]

Is the isPlayerAlive task returning success:true when it should?

[hearty niche]

does anyone know how the token system works? I.e crowds of AI attack one player but take turns to give the illusion of fighting off hordes. Something like in Doom and Doom Eternal.

I cannot find any articles on this either

[misty wharf]

Token system? Is this a name for what you're describing because I've never heard of it :P

[hearty niche]

thats what Hugo called it for Doom Eternal. Basically ai dont attack all at once but a select count do at a time preferable closer to player.

[misty wharf]

Ah

I mean it sounds like you'd just have to decide what are the rules for when the AI's can attack

Or perhaps you can have some system which has a list of currently engaging AI's, and you can see how many you've got in the list currently, and swap them out etc.

[hearty niche]

kinda yeah pretty sure melee combat games use this too

but cannot fully understand this

basically makimg the player believe they are taking down a horde

[misty wharf]

Well if you have a lot of enemies spawned, you can have some kind of queue

Put all of the enemies into a list, then tell the three first ones to attack

Whenever they die, you tell additional enemies from the array to attack

[hidden bloom]

Hi again zomg. Just wondering, is this going to work as I expect it to? I want to be able to use either a actor or a vector in this task's key.

[misty wharf]

Yeah checking the type should be fine

You can also break the blackboard key selector (it's a struct) and compare the type in it

[spring inlet]

what's the way to go to let an AI wander around on specific materials, e.g. a street

i can think of line tracing for the material, or volumes in which they are allowed to move, but guess theres a better solution out there

[ocean wren]

VEGITO: There was a presentation on exactly that by Chris Jurney that he did for one of Relic's RTS games.. might want to check that out. I also remember a similar presentation by someone from Squeenix.. I'll try and remember. It was mostly in Japanese though 🙂

Oh and there's one by one of the AI guys from Sunset Overdrive that might help, pretty sure that's on YouTube too.

Ben: I would use the navmodifier volume system, that's basically its purpose. Pretty sure you can restrict the use of them via flags etc.

[spring inlet]

watching a tutorial right now, which uses navAreas and navigation query filters, seems good

[misty wharf]

Yeah nav filters/areas/whatever should work, you can use volumes to define parts of the navmesh to be a certain nav area type, and you can restrict things like querying for a navigable point within radius to use a nav filter which restricts it to a certain nav area type

[foggy sequoia]

Quick question : How do I get the nearest eqs point around a ai

[misty wharf]

do you have a list of points or what exactly are you trying to do?

if you're making an EQS query, you could use a Distance test and use the queries context

then if you get the single best result from it, it should just give you the closest point from that query

[foggy sequoia]

just from the eQS grid

[misty wharf]

Right, add a Distance test to it then :)

I think for the settings you need to have it on Score Only, you might need to invert the criteria because it might give furthest first by default, but not sure about that one

[foggy sequoia]

Yes the AI system im trying to mimic is also using a scoring system, and getting the nearest point is the first test. from the documents Im reading

from me I can see the score expanding outwards going up. But I would like it to be higher, if its closer.

[misty wharf]

Right so if you look at the distance test it has a curve on it for scoring it

I think there's a dropdown on it too, which defaults to Linear or something like that

[foggy sequoia]

ok It was inverse linear

[misty wharf]

ah, yeah so putting it on plain linear should then reverse the scoring :)

[bronze hill]

Hi, I am facing some problems with my Ai controller. basically i am looping through all actors sensed, and then again through all the last stimuli sensed checkhing with a branch that they were successfully sensed. if they were, with another branch i check whether the tag of the stimuli is the player footstep sound, if not it's the sight (i'm not making other sounds for now), if it's the steps i set to true the blackboard bool "HearPlayer", if it's the sight i set to true "SeePlayer". then if it was the hearing, i set the stimuli origin as the blackboard vector TargetLocation the AI will go to. instead if the "successfully sensed" check is false, i turn both hearing and sight to false.
The problem is that they never actually turn off. or depending on the situation they will turn on but the AI will act as if they weren't for some reason. what am i doing wrong?

[foggy sequoia]

OK more difficult eqs SCORE. I want to know how to run an eqs score test to score POSITIONS where an AI would have line of sight to the player.

[misty wharf]

Use a trace test with a custom context that returns the player pawn

You can set it to filter only, and it can filter out all items that don't have LOS

@bronze hill So it just gets stuck in the BT into the first branch where it checks for SeePlayer?

Or?

[bronze hill]

with the current settings, it senses the player when it's seen, but it never turns "SeePlayer" on

at the same time it hears the player and turns "HearPlayer" to true, but never turns it off even when the player is outside the hearing radius

i'm going crazy, a whole day trying to debug it with no success

[misty wharf]

Ah

Are you using AISense_Hearing for it?

[bronze hill]

yes

i'm using both sight and hearing

[hearty niche]

You have links?

[misty wharf]

You probably will never actually get a successfully sensed = false stimulus with it. AISense_Hearing only reacts to the hearing events

It doesn't have any way of tracking when you are outside of the hearing range

afaik

[bronze hill]

wait wut?

wym

[misty wharf]

hearing doesn't work the same way sight works

[plush meadow]

thats exactly what wasnt returning true. after 18 hours of sitting behind my desk and trying to figure it out, I realized that since the player dies, there was an if statement that returned nullptr which is why it wasnt executing the line that determined player had died

[bronze hill]

i know that, but they both have a radius

[misty wharf]

sight uses a line trace to test when something is visible or hidden, and uses that to determine when something is seen... hearing only reacts to events that you manually send

[bronze hill]

yes i know

[misty wharf]

the hearing radius is just how far it can hear them to begin with

[bronze hill]

yes

my point is

[misty wharf]

so as far as I know if you submit a hearing event that's out side of the radius, it won't generate a stimulus update with successfully sensed = false

[bronze hill]

when i get out of the radius, every sound i send shouldn't be registered

[misty wharf]

exactly

they aren't

but it also doesn't trigger a stimulus update that sets successfully sensed to false

so the logic of checking for it doesn't work

[bronze hill]

wait i think i know what you mean

what can i do instead?

[foggy sequoia]

HAS the thing your trying to detect got a stimuli?

[bronze hill]

yes

it's the player btw

[misty wharf]

If you're constantly sending sound stimulus events you could probably have a timer or something

[foggy sequoia]

its set to report noise events?

[misty wharf]

if the AI doesn't receive any sounds within the time limit, it considers it to not hear the player anymore

[bronze hill]

i set the footsteps to have a notify, and i report the noise event with it

[bronze hill]

makes sense

[misty wharf]

I think there might be a builtin option for it too, there's some kind of forget time in there but I never really looked at that much

[bronze hill]

now the question is

why even tho i;m standing in front of it

and i see in the ai debugger that it is sensing me with sight

it still wont change "SeePlayer" to true?

[misty wharf]

Have you checked that it's actually processing the sight stimulus correctly in your logic that should turn it on?

[bronze hill]

i think so

all the logic is in those 3 pics

[foggy sequoia]

try to simplify it to just that objective when trouble shooting , something eles might be interfering

[bronze hill]

the behaviour tree and the AI controller where i'm setting the values

[misty wharf]

The only thing I can think of is the async delay but tbh I'm not sure. Try adding a Print node before the set value as bool and have it print out the bool to see what it's setting

[foggy sequoia]

when you report the noise event your also sending the actor location to the ai?

[bronze hill]

i'll try now

btw without that timer it actually fucks up a bit

[misty wharf]

Really?

[bronze hill]

no that's done in the pic

when the hearing stimuli is sensed the stimuli origin is set as TargetLocation

[misty wharf]

The sight/hearing system in my shooter project is definitely pretty similar to this and I never really ran into any kind of peculiarities with it

[bronze hill]

computers love what u want me to say😂

[misty wharf]

Although I'm not using the stimulus event with the array parameter, instead I'm just using the one that gives the stimulus event

[bronze hill]

i followed a tutorial step by step

and here i am

ok now it sets hearing back to false successfully

although also when there is a new noise it will still check out the current one first, how can i change that so it will abort and restart when there is a new input?

[misty wharf]

You would probably have to toggle it on/off to get it to abort, or have it update the movement target

[bronze hill]

wym? how do i do that?

[misty wharf]

which part

[bronze hill]

either lol

[misty wharf]

lol

[bronze hill]

wym by toggle on and off

[misty wharf]

well toggle would be set the boolean to false, so it aborts because it's now false

and then set it back to true

the update movement target you might need to repeatedly run the move to logic so that it would get the latest value from the blackboard for it

[bronze hill]

so i would have to set 2 variables, one for "investigating sound" where it keeps checking out sounds, even after they are heard, and the other to signal when one has been heard

so every time one is heard, i abort the tree and restart, but will keep going into the same branch as long as the other one is true

so like it will investigate the new sound location, but will keep investigating until the investigate is turned off

makes sense

could you have a look at the seePlayer thing?

and why it wont turn on?

[misty wharf]

well if it's still set up the way it is in the screenshots I have no idea lol

it looks like it should work, so the only thing is that some of the values probably just aren't what you'd expect them to be

so I would suggest adding some print nodes in there to make sure the values are correct before the set bool value node runs

and also to make sure that the code is actually running that part to begin with

[bronze hill]

All right will try

[hidden bloom]

Quick question. How would I use 'Add Movement Input' performance-efficiently for a pawn that will be instanced a handful of times at once?

Is Event Tick alright?

Oh, and the behaviour tree currently looks like this