gameplay-ai

[glass falcon]

and each of them are sub trees that handle stuff differently

[flint trail]

I see @glass falcon

[glass falcon]

yes child

[flint trail]

but based on the BT names in the Run Behavior in the second screenie, they are all the same tree, except for the first one. I am not sure I understand.

[glass falcon]

thats because Im lazy

and haven't done any logic for those gamemodes

[flint trail]

also, it would be the same thing switching between trees, wouldn't it be ?

[glass falcon]

I run the tree once when the ai is possesed

then it handles itself

wanna see them in action ?

[flint trail]

in my particular case I have some logic in the AI Controller, which gets passed to the BT.. Instead, I can just execute combat tree when needed.

[glass falcon]

oh, nice

[flint trail]

perhaps I can switch between 2 main trees, and have subtrees to organize within each of those..

What about debugging with subtrees? How does that work?

[glass falcon]

you just debug and step between trees

[flint trail]

ok, thanks

[acoustic condor]

anyone know how I could have disabled the ingame console (tilde key) and the ai debugger (apostrophe key) in the editor? I can still access console cmds in the output log window but otherwise i cant bring them up. Checked input and debugger settings keys are still bound.

I just tried another project and its the same, so confused as to what I have done

k binding it to a key other than tilde works for the console

so weird

been using it all day

k the language of my keyboard was changed too Use language list - recommended after a windows update if anyone else has it

[flat dome]

Was thinking, could I just use the "Move AI to player" function for a basic chase function?

Is there any downside to using that over the EQS system?

[stable void]

anyone know when unreal aborts a path?

[flat dome]

So I made a function for the AI to follow the player. I dont have any sort of models, is there still a way to get it to respect the radius using the AI move to funciton?

[misty wharf]

you could do that using a perception component

just set the range to the radius you want and the angle to 180 which should make it so it also sees behind

iirc it's half-angle, just hover over the thing when you're configuring it and it should have a tooltip explaining it

[misty wharf]

It's possible the AI's line of sight is being blocked by the other AI, so it doesn't actually see you anymore

one way to solve this would be to create a separate trace channel for AI LOS and make the other AI pawns ignore it so they won't block the sight to player check

[misty wharf]

I don't really know. The Sight sense functions by doing linetraces, and if something blocks it instead of hitting the target, it's considered not visible

It is possible to define ignore actors for traces, but I don't know if the sight sense exposes this function anywhere

I think it might still get blocked, it just won't count friends as seen

Using a separate trace channel for it would be quite easy though, you just define the channel in the project settings, and have it ignore pawns by default

then you just make the player pawn block on that channel

I think that should make it work

[pine steeple]

i did a reverse trace

where it only traces for things that would block it in the world

non blocking hit? then we have LOS

you can do you own traces, but requires C++

but its per stimuli, and is done using the GenericSightInterface

[hearty niche]

I probably have a similar issue but the problem is that I want it to detect friendlies to like for example, detecting dead bodies, and this one thing I am trying out where an ai when receiving a callout runs towards the ai that made ir and on seeing the ai copies its state, go into search if he is in search or start firing at the player if he is doing so.

P.S I have done an implementation for detecting by affiliation

[lyric flint]

Hey guys I already have attacking health system and stuff and I want to make an Ai that would attack me and deal damage same as me dealing damage to him anyone Kniow how to go about that

[hearty niche]

Umm too vague. What kind of combat? Ranged? Melee? human? creatyre?

Elaborate

[lyric flint]

Melee

[lilac pasture]

Hi how to make another system of calculating the path for AI. Or how can I fix the bug with the fact that it is not moguct to go to the point shielding that he already came

[tough helm]

hey, just saw that request execution on lower prio task is now ensuring

how can I know if the current task has higher prio in decorator code to avoid this?

looked into decorator BP Base and even it doesn't do it

it checks for active branch, but not active branch can mean both higher and lower priority

so technically even UBTDecorator_BlueprintBase ensures in case it's obsevring a BB key while something is higher prio, or do I not understand it correctly?

[fallow hound]

hi all, how do I get the desired velocity of an AI?

not what it is actually moving at, but what its path following wants it to do?

thanks

[main lynx]

Hi everyone, I'm new and trying to do some simple AI things using blueprint. I'm following an unreal livestream, I don't know if I missed anything, but my move to actor always fails. I have movement being done in my AIcontroller class, I have a nav volume, I have my pawn's AI controller set to my AIcontroller class, not sure what I'm doing wrong here.

nevermind

I had it set to a pawn, but it should have been a character

[uneven shell]

Hi guys, can anyone tell me the reason this setting exist in EQS? Apparently there is no way to set vector query param from blueprint (at least in 4.25). What I'm trying to do is start the visibility trace from gun's muzzle to the target. It's essential while shooting at targets on different height levels. Any idea how to do it?

[pine steeple]

@uneven shell that is a bool

[uneven shell]

it doesn't make it any clearer since this event takes only float argument

[pine steeple]

yeah seems a limitation of the EQS

assuming it likely converts any non 0 float to true

0 float being false

[uneven shell]

hm that could be the point. but since it's a bool, then how do I specify where the trace starts?

[pine steeple]

the context is already set

Context_GetEnemy

it traces from Context to Item

if you flip that bool, it traces Item to Context

and it will just trace to getactorlocation

you want to make your own Test specifically for weapons

[uneven shell]

ohhh so that's how it works! thanks, makes sense now

[lilac pasture]

Hi how to make another system of calculating the path for AI. Or how can I fix the bug with the fact that it is not moguct to go to the point shielding that he already came

[gentle smelt]

Hi guys, may you help me?
I use task "Run Behaviour Dynamic". It works perfectly, when it is placed in main behaviour tree. When it is placed in other behaviour tree, which I run with "Run Behaviour" or "Run Behaviour Dynamic", it doesn't work.
It is bug? Can I use "Run Behaviour Dynamic" for sub-subtree?

[lyric flint]

Custom behavior tree decorators work like regular decorators right? I mean, the bool value will be checked constantly during the duration of a composite

[stiff gale]

My ai alwys waits. It suppose to be on Find Bot Waypoint. https://gyazo.com/14861d25ea9a0603a2a5482c57b80dcd

[stiff gale]

My AI won't patrol. I can only get it to move if add movement input to its event tick

Otherwise the speed is always 0

[flint imp]

I have almost 0 experience with AI and multiplayer, whats the best way to handle finding closest player in pawn sensing?

I was going to use a foreach loop, but that seem rly costly

wait nvm, im dumn

[simple crest]

hi dumn, i'm stupio

[flint imp]

nice to meet u stupio, i'm sure ill meet u here more every damn time i mess up bcz i refuse to search up tutorials 😩

[hearty niche]

there is eqs and otherwise foreach in my knowledge. Just keep the number of iterations low

[flint imp]

im using 12 players with hundreds of zombies

im using pawn sensing now

i didnt know that existed

[hearty niche]

pawn sensing is depreceated and ai perception is better in terms of performance

but yes adding perception narrows down the number of checks by a lot

[flint imp]

wait, but if im making a simple zombie, isnt a depreceated version enough? zombies arent too complicated? its just a move to, and decisionmaking

mb i should still use ai perception, just to learn it, thank u regardless

[hearty niche]

the perception system got replaced with something of better performance. Why stack up unnecessary load. thats what I meant.

Considering how many you have at a time especially

[stiff gale]

One of my bb keys won't up in the behavior tree BP. Any idea why not?

[atomic badge]

Did you remember to make it public?

Otherwise the tree can't access it

[stiff gale]

how ? https://gyazo.com/96c30c53c6d78a5469d735884cfff645

[atomic badge]

I have no idea about C++

[kind iron]

public:

But also

UPROPERTY(BlueprintReadOnly, VisibleAnywhere)
FName TargetLocation = TEXT("TargetLocation");

[stiff gale]

You can't use public and didn't work

[kind iron]

ah, yeah I didn't see it was just a namespace

[vast sluice]

For some reason after my AI loses me, if i walk near it, it randomly sees me again without even looking at me, anyone know how to fix?

[prisma meadow]

Hi everyone, I want to have images that are black and white that I can use to automatically create procedural meshes based on what is in the image.
Example: A floor plan image, the ai sees the picture and creates walls, doors and windows where it can be seen in the image.
Anyone know if this is possible inside unreal, and if so, by what means? I am stuck in research and thus resulting in asking here. If anyone have an example or can pin point me in the right direction I would be over the moon!
Thanks

[atomic badge]

The sensing area might need some adjustment

[brittle lark]

Hi can someone please explain me what Set Tag Cooldown does in behavior tree?
where are we gonna use this task or decorator?

[stable void]

Anyone knows what this is?

can't find anything online

[misty wharf]

It seems to relate to PerformStringPulling

it's some kind of algorithm used in pathfinding, there's some discussion on it here https://www.gamedev.net/forums/topic/539575-string-pulling-explained/

[stable void]

thanks @misty wharf

[brittle lark]

My bots detect my player as a neutral. does anybody knows why?

[misty wharf]

have you implemented the team interface on it?

[cerulean walrus]

So I have been working on my AI here and I have run into an issue once I added the perception for hearing and seeing. I cant seem to figure out why but the AI can see the player through walls and things. It seems to be triggering the canseeplayer branch the moment the player gets within range of the perception triggers no matter what. If anyone sees something I am not and can help it would be great.

[simple crest]

I'm honestly confused, did you just make up some c++ code and expect it to create a blackboard key or are you following a tutorial somewhere? Do you know how to use FBlackboardKeySelector?

[uneven quest]

How can I get an output from a custom task? I have a task that calls ProjectPointtoNavigation and I'm trying to use that vector in a MoveTo node

Alternatively, how can I have my task function similarly to MoveTo, in that it doesn't finish executing until my pawn is at the spot

[odd nexus]

Hi everybody. I'm making a Football Simulator for science using.
I've made the Behaviour Tree for my football-AI with different States like: SlowRun, FastRun, Shot, Pass, Header etc. with a logic how AI should act. Now Input cames from Keyboard-Input in ThirdPersonCharacter. That Input changes the State of AI.
I need to implement the logic of how exactly each football-AI should behave to simulate some football situation, like some pass-run combination or corner.
How and where can implement this logic, which each football-AI will affect to change the State in their Behaviour Tree?

[misty wharf]

You can use a blackboard key selector variable to allow the user to choose which BB key to assign something into, and then assign that value in the custom task

[uneven quest]

Thanks

[uneven shell]

You can use inversed BT Decorator IsAtLocation

[uneven quest]

I realized I ran into another problem in which my projectpointtonavigation function returned a location not on my navmesh for some reason

[uneven shell]

Can I see how does this function look like?

[uneven quest]

Sure

I just rewrote it

but ill send what I have now

I only rewrote the second half though

part 1

part 2

Hope thats legible

[uneven shell]

hm hold on. What exactly is the purpose of this task? As far as I see you're trying to move your pawn to its current location

And also it's super overcomplicated

[uneven quest]

Okay, so really all I want to do is get my pawn near a location. The location itself is not on the navmesh. When I try to MoveTo that location on its own, it wont budge. So I made this task to project a point onto the nav mesh so that my pawn could move to that location.
Then I debugged and that location is actually somehow outside of the navmesh.

So the moveto turns out to be in an indefinite loop cause the pawn never actually reaches the point lol

[uneven shell]

hm why not just resize navigation bounds so it includes the location you're trying to reach? even if it's unreachable, the pawn will try to get as far as possible, and the BT setup would be pretty simple

also this BTDecorator will prevent launching any further task if the pawn hasn't reached location yet

[uneven quest]

Thanks!

I'll play around with stuff

Unfortunately I can't change the navmesh because I'm trying to have the actor be a ship on the "sea" and the unreachable part on "land"

[gilded fern]

oh god this is gonna be such a dumb question but uh

how do you move splines?

im trying to make an ai path for car

u see

i can't select this

;_;

[uneven shell]

that sounds quite specific, I'm not sure I would be able to help without looking more into your project. But I'd suggest covering the whole level in nav mesh bounds volume and then using Nav Modifier Volumes to restrict your ship from accessing specific areas

[gilded fern]

i kinda feel like this is more of a general question

oops

[brittle lark]

No i'm working with blueprints ... Should I write codes for this purpose?

[misty wharf]

yeah the team stuff is only available in C++ as far as I know

[misty wharf]

That is an extremely broad question and cannot be answered unless you make it significantly more specific

[uneven quest]

I was able to create a working AI now with those instructions 🙂

Unfortunately, now I'm still stuck with this issue that the pawn is stuck looping on MoveTo trying to get up to the ground.. Is there any way to stop the command whenever they're within a certain distance of the location?

Acceptance Radius doesn't do anything

Strangely enough. I read that might be because they're not on the same Z level

[uneven shell]

Good to hear it helped! If you're using IsAtLocation decorator, then also try setting acceptance distance there. Z value is also considered by the radius

[uneven quest]

Got it to work!! thanks @uneven shell
Yeah I played around with more distance values. For some reason, distance in the behavior tree is different than that calculated between vectors? Maybe I'm missing something. But anyways yay

[uneven shell]

Nothing I would know about, but UE4 can be full of surprises 😛 no problem, good luck with your project!

[stiff gale]

Anybody knows what's wrong with this? https://gyazo.com/df6d37e536bea1473f51aef2c3c2ec38

[misty wharf]

I find that if I can't find a decent answer the simplest method is best because it's the one that's easiest to change if it doesn't turn out to work in the future :D

[patent hornet]

really depends on what you're trying to do here

[misty wharf]

Navmesh could be missing, actor might not be on navmesh, point might not be on navmesh, point might not be reachable, either way it looks like the moveto is failing... if you enable visual logger it sometimes shows a bit more details on why navigation fails

[patent hornet]

you'd need to override the pathfollowing components functions for that

stop at each path point, wait for it to rotate, then continue to the next one

[stiff gale]

I have navmesh and the actor is on navmesh. THis is my find random locaiton. https://gyazo.com/931275e93cfbd1551413a7c99bbc0de3

[misty wharf]

@stiff gale That point could still be nonreachable from where the actor is... but I think visual logger might give you more details

I would also add some logic to draw debug spheres so you can see where the points it's trying to reach are to verify it is actually a valid point to go to

[patent hornet]

and your task returns success even if it fails to find the location

[misty wharf]

(if vislog has nothing useful)

[patent hornet]

@lyric flint you'll need to use ObjectInitializer to replace DefaultSubobject class for PathfollowingCOmponent on AIController

be warned, blueprints don't handle changing those well

so plan ahead

i don't remember the exact steps we used to get to it, but changing the subobject type ended with c++ class having a pathfollowing component and derived blueprint having nullptr

had to recreate the entire AIController BP

@pine steeple what did we do to break it, do you remember?

[pine steeple]

changed the main ai controller from custom path following to default

and it broke the bp, bp kept throwing it as null

[stiff gale]

My radius is 1500. Is that mean I need to increase the nav mesh area?

[misty wharf]

No, it has nothing to do with reachability.. a point can be navigable (eg. on navmesh) but not be reachable (eg. there is no valid path to it from the current position)

you need to find out the reason why it's failing instead of trying to guess

[stiff gale]

Like 31 was my issue strange. I replaced that with this: Ctrl->GetBlackboard()->SetValueAsVector(GetSelectedBlackboardKey(), Location.Location);

Beside that, do you guys know why sometimes the navmesh won't show up when I press P

[misty wharf]

I think the editor focus has to be in the viewport or it won't work

you can also enable it from one of the dropdowns in the top left corner of the viewport if it won't show

[stiff gale]

Yea i tried that didn't work. But it works in diff level.

[misty wharf]

Then it sounds like you don't have a valid navmesh on that level

[stiff gale]

So I added nav invoker to my character and got it working. But do you know how to add it via c++

[misty wharf]

at least if it still won't show up when you go thru the dropdown

I haven't really touched the nav stuff that much on C++ so not sure about that

[glass falcon]

is there an alternative to behavior trees?

I've been using them for a while now and I've just about had it with stuff that works perfectly just breaking for no reason.

[patent hornet]

that is how AI development works for first few years

[charred lava]

About CharacterMovement->Orient Rotation to Movement = true and combining Set Focus Point / Actor.

I'm not sure how I should solve this Problem.

• AI has the Focus Actor set to the Player
• AI doesn't move and the Player stands behind him, causing the AI Character not to orient his Rotation, because "Orient Rotation to Movement" only rotates the character on movement.
• AI Perception Component is on the AIController and since the Control rotation is looking in the other way of the AIPawn, it is miss leading.

I thought about turning off Orient Rotation to Movement and just Lerp the Rotation on tick, but without an Rotation animation this looks unnatural.

Or I thought about attaching the AIPerception Component to the AI Pawn, but again, I'm unsure about that, because it should be attached to the AIController right?

I would be very grateful for tips 🙏

[charred lava]

UseControllerDesiredRotation makes the AI rotate immediatly. I want that the AI still lerp it's rotation with Orient Rotation to Movement.

[stiff gale]

ANy idea I'm seeing multiple

[uneven shell]

Hey guys, sometimes my AI characters seem to reach their MoveTo location, but then get stuck there for a couple of seconds before aborting. I checked the distance to their target location in Tick by DrawDebugString and it's always lower than the one I stated both in IsAtLocation decorator and the MoveTo task itself. Somehow it's just not detecting that the distance is short enough to proceed in Behavior Tree. Any idea what's happening? I tried playing with IsAtLocation parameters but it doesn't seem to work

[charred lava]

I have turned off

• bUseControllerRotation...
• Orient Rotation to Movement
  and turned on bUseControllerDesiredRotation and when the AI Sets the Focus to the Player, he immediatly turns around. Not a smooth rotation lerp between current rotation and target rotation similiar to OrientRotationToMovement.

Also when using simple "move to" he rotates immediately

oh wait

nvm Lorash, myB. I thought I had bUseControllerRotation.. turned off, but I didn't x) Sry

[stiff gale]

If I want to get player location via BTTask, how can I do it so that it works in multiplayer? Can i do GetPlayerCharacter at index 0

[misty wharf]

index 0 will return the player who is at index 0

I'm not quite sure how that ordering works - I'm assuming it's order of joining game

so if that's the behavior you want, then yeah you can use get by index 0... otherwise you would need to figure out how to select the correct player which could for example be finding their pawns by distance

[unborn jungle]

Any tips to prevent AI hugging walls to get to a destination in the shortest route possible?

Looks really bad with wide corridors and they hug walls

[pine steeple]

@unborn jungle not really

you could put modifiers to force them more near center

but they will always try to get near walls as that provides the closest path

[brittle lark]

Ok thank you

[misty wharf]

I wonder if it would be possible to sort of.. fuzz the path following a bit

I don't really know how easy that would be to do - but basically you'd just have the actor not follow the path exactly, so you could for example offset the points a bit which would make them not follow it so rigidly

putting modifiers to force them near the center would probably be the easiest way... you could just make the areas near the walls more expensive to traverse. This way they would still be possible to traverse (eg. for collision avoidance or whatever) but they'd avoid them

[glass falcon]

orient rotation to movement makes their movement smooth

then when you want them to focus you can disable orient rotation then lerp their rotation to their control rotation using a timeline

and set use control rotation yaw = true once the timeline ends

[pine steeple]

that feels hacky

my ai always use controller rotation (not orient)

[charred lava]

I'm currently pretty happy with bUseControllerDesiredRotation

[pine steeple]

you can adujst the rotation rate in the CMC

so they don't insta snap

[glass falcon]

but I still notice some snapping

imma try it out

[pine steeple]

we also went further and modified PhyicsRotation in the CMC for more smoothness

but that is optional

[charred lava]

CMC?

[glass falcon]

character movement

[pine steeple]

Character Movement Component

[charred lava]

ahh right

thx

[vale notch]

I'm looking for a good way to determine what my AI is currently up to. For usage, I'm intending to create an UI element where I can display what the AI is doing, and I need to be able to retrieve that info.
Is there a good way to do this in a behaviour tree, maybe figure out which branch it's on at the moment? Or do I need something like an enum in the character itself and change it depending on different conditions? I really just need a pointer in the right direction, and I can figure out the implementation details from there.

[glass falcon]

press '

assuming I have a move to in a sequence, if that move to aborts because of a decorator does the sequence fail ?

[patent hornet]

@lyric flint i say a good talk about it, unfortunately, i can't remember what it was called or who gave it

[glass falcon]

is there a proper way to debug and record all the AI's actions

[patent hornet]

had the entire step by step evolution from point to point to curving the corners, adjusting the animtions...

thats "it"

[uneven quest]

How do I debug pathfinding?

Specifically, I need to see the path that my AI is following

It doesn't show up when I just have the visual logger on

[glass falcon]

use '

press the ' key

[uneven quest]

Lol I just realized the conversation above was relevant

Hmm interesting

It seems my AI navigation doesn't update when there's an obstacle in front of it

[glass falcon]

i the obstacle added dynamically ?

[uneven quest]

Yes like the player

[vale notch]

That's not quite what I meant... I mean, I know what my AI is up to, but I would like to display different information that the player can see depending on what it's doing. 😅

So is there a way to reach the information that the AI debugger displays? 🤔

[glass falcon]

that i do not know

has anyone seen this kind of error before with ai

it enters this tree and just stops

and the visual logger just says "root not initialized"

[vale notch]

hm. weird. what does the BT_RoamRandomly look like? is the root connected properly there?

[glass falcon]

this is it

when I added this to the first one it printed a message even though as far as debugging is concerned the tree isn't running

[vale notch]

🤔

[glass falcon]

this was all working perfectly a while back

suddenly it chose violence

[vale notch]

i've also never seen that before... try reconnecting the nodes? 😅

[glass falcon]

I think I'll just start looking into utility ai

the tree just decides to choose violence every once in a while and I cant take it anymore

[vale notch]

understandable 😄

[uneven quest]

Any way to not generate navmeshes inside of landscape?

[vale notch]

is that two landscapes? landscapes are really just a plane, so technically the flat one is not inside the other one, which... is where your problem lies

[uneven quest]

Nope one landscape

I do have a mesh under it

I just figured the navmesh wouldn't generate under the landscape

And I see what you mean

If it was a volume it would block navigation

[vale notch]

yes 🙂

[hearty niche]

Hey guys need some advice or at least some guidance for making flying ai that can follow me with some basic pathfinding like cacodemons in Doom 2016 and Doom Eternal. How could I go about this?

[sage schooner]

why oh why does my AI controller not spawn at all?????

[vale notch]

does your character/pawn spawn?

[sage schooner]

Initially I had them placed, I've replaced them, no luck, I think tried spawning them, no dice. Tried Spawn AI node, no go.

[misty wharf]

Fwiw, with the settings you have on the pawn, it should auto-spawn the controller without any BP logic involved

[sage schooner]

Thats what I assumed! Only started adding more stuff when it didnt work.. ive set the default class, but it refuses to use it.

[misty wharf]

I don't remember 100% sure but the spawn default controller node might just spawn a basic AIController and not the one you've configured

you can manually spawn the specific controller class you want and see if that helps

[sage schooner]

Ah, i assumed if i casted to it it would...

[misty wharf]

well if it spawns an AIController, casting it won't make it into something else

[sage schooner]

like a literal, spawn actor class bsEnemyController?

[misty wharf]

Yep

[sage schooner]

right that makes esnes

[sage schooner]

??? 8(

[misty wharf]

What's the variable AI controller class set to?

most likely it's null if the spawn failed

[misty wharf]

🤔

try printing it before you spawn, and then print the returned value from the spawn node

just to confirm what the values are ingame

this is how I'm spawning controllers for my npc's so it should work the way you set it up

[sage schooner]

hey just manually putting the in the class instead of the default worked

😄

seems like that variable is straight up busted

[misty wharf]

Weird, sounds like it

[sage schooner]

coz the way everyone acts, setting it properly and spawning default controller should do the trick

thanks for the help.. was getting angry!!

[rapid ridge]

is there a way to make use the Move To behavior tree and not stop moving if it has another place to move? or an alternative way of doing this?

[abstract spindle]

Guys i have a problem after i added UCrowdFollowingComponent to my custom AIController. CrowdFollowingComponent throws an error after MoveTo call: LogCrowdFollowing (Error) Invalid navigation data in UCrowdFollowingComponent::SetMoveSegment, expected 0x43E7900, got: 0x44548F00

https://i.gyazo.com/00dfaa89ab28397d3db873d672477c3d.png

So i understand that CrowdManager->GetNacData() returns another navmesh or navmeshdata pointer that recastnavdata

So where and how do i set both to make em match? ^^

https://i.gyazo.com/50b15ac9f5db2d4cb6f6ab9f394139fc.png

[abstract spindle]

deleted and readded my nav agents now its "working"

i only get "blocked" as error now, which is even more strange ^^

since i removed my collision box and my static mesh completely

[wise iris]

Anyone using Event ReceiveDeactivation on BT services? It seems like whenever part of a tree finishes, for example when a "Wait" task finishes, the service above it is deactivated regardless if it will be active again the next tick

Would be very useful if I can detect an abort/invalidation of the service, versus just a "finished"

[wise iris]

Hmm, seems like tasks have an abort event, but not services :\

[pine steeple]

services dont abort

they just deactivate/activate

and yes i ran into a similar issue, but i just fail-safed against any potential issue. Not much you can really do about it

[wise iris]

Ah shucks, that's a major PITA

I thought I would just hack it by imposing a frame check to see if it's active again the next frame 😆

But doesn't always seem to work

[pine steeple]

yeah i just don't care in services, i just make sure i never end up in a bad state if the service goes away one frame comes back next frame

[wise iris]

Seems more sensible

[twin topaz]

does anyone have any advice for organizing behavior trees? from what I can tell there's no way of encapsulating parts of the tree or making subtrees?

[glossy spire]

@twin topaz you can use use sub-trees by using Run Behavior or Run Behavior Dynamic

Typically I'll have one main tree for my enemy characters that run sub trees for paroling, combat, idle, etc

and use dynamic trees for special abilities unique to that particular character

[twin topaz]

oh interesting

do they share blackboards?

[misty wharf]

afaik they all need to use the same BB for it to work yes

[twin topaz]

cool, thats helpful, I'll try it out

while im on the topic

I seem to be misunderstanding some fundamentals about the trees themselves

I'm thinking of sequences like AND's and selectors like OR's

but sometimes I get results that confuse me, where the trees seems to succeed or fail differently from what i'd expect

I have a lot of custom task nodes

but currently I dont fail out of any of the tasks, they always succeed

I use the blackboard conditional decorator a lot, does that cause a sequence or selector to "fail" ?

I was thinking of it as like a gate that prevents that branch from executing but im starting to think im wrong

[pine steeple]

@twin topaz if you have Sequence -> Selector -> Task, and that task, fails, the Sequence will also fail.

not just the selector

[twin topaz]

I see

so it all bubbles up

[pine steeple]

right cause the task failed, the selector then failed, which fails the sequence

[twin topaz]

so when things start to fail

and its cascading failures

it bubbles all the way up to the top

and runs again?

does the tree essentially just execute over and over until something makes it stop?

[pine steeple]

yes

[green leaf]

Anyone have any tips for AI communication? I have a multicast C++ delegate for a friendly AI receiving damage, and will then set the attacker as an enemy and start attacking them. I want "allies" of the NPC to attack the same target. If there isn't a great solution out there already, I was thinking of a simple C++ AI Registry class that AI would register themselves, and their affiliation with. It would also listen for the damage events, and send events to all allies of the damage that was done. Are there already perception systems set up to handle this stuff for you?

[uncut python]

Hi everyone, so im having trouble with my AI not moving at the speed that set. I have it set to max speed 530 and i even did it at begin play and its clearly not moving that speed. Is there a way to fix this?

[frigid chasm]

hey, might some one have some insight into ai move to nodes not working for other people who have the exact same project and data? currently when this ai move to node is called it never succeeds or fails for for the other person with the same project. however on my end it works perfectly, we have tested other movement nodes and they dont work either.

[umbral trail]

Not sure if this is the right place for this question - how to show path AI will take? Just like in Unreal Tournament games, CTF mode?

[abstract spindle]

Hey guys id appreciate some help. Ive got a Pawn with a simple custom movement component derived from floatingpawnmovementcomp. The pawn is controlled by my custom AIController via Blackboard and beahviour tree. Everything works fine, unit moves when it gets its moveto order, so i moved on to unit avoidance. I added a pathfollowingcomp to my aicontroller and now once the move order is issued nothing happens. Vis Log tells me that moverequest got accepted but 3 seconds later it just quits with the message "OnPathFinished: Blocked" and then restarts the move request. To make sure my static mesh or collision box isnt blocking, i removed them for testing. With the same result. Once i remove the pathfollowing component from my customaiclass it all starts wokring again. does anybody know what could be causing this problem?

[vital zinc]

Hey friends! I am having a really strange error with my AI debugger. For some reason the "Apostrophe" key is not opening the debugger at all. After some investigating I found that the key bind was empty in my editor preferences to which I went ahead and re-added it.

Even then the debugger still would not appear for me. has anyone come across this issue or have a fix?

Thanks in advance!

[abstract spindle]

fixed this problem by creating an instance of crowdfollowingcomp and using that in my movementcomponent instead of the original one

[stiff gale]

Is it possible and stable to create a zombie AI that can roam and attack using EQS in UE4.26?

[misty wharf]

Sure, why not?

[stiff gale]

But is it possible to make complex ai using it?

[misty wharf]

EQS is not an AI system, it's a system to complement your AI

[stiff gale]

For example?

[misty wharf]

it's in the name - environment query system

you use it to query information about the environment, which is something you could do with regular line traces, for loops and whatever too, EQS just packages all that functionality into a system that allows you to easily build that type of logic

[uneven shell]

Hello, I have a question about navigation - is there a way to force update navigation from blueprint? I'm adding NavigationInvokers to some of my pawns on runtime, but in most of cases it's not rebuilt automatically, and I need to approach it with my player character which has the invoker already built in

[uneven shell]

Hey my navigation invokers don't update in most of cases please help, I'm trying to setup working navigation for over a year

[wise iris]

For those with large maps and AI, do you use multiple navmesh bounds?

I encountered an issue before where having a nav mesh bounds that is too large would cause the navigation to never work (using nav invokers)

As a workaround I would add multiple nav mesh bounds, but it's a bit shitty. Figured perhaps there's a better solution.

[uneven shell]

Yes, it's a pretty large map. Hm I haven't tried multiple nav bounds yet, I've seen many people discourage it

[wise iris]

I would put the invokers on the the AI itself, not sure why you would put it on the player?

[wise iris]

For posterity

[uneven shell]

mostly for optimization purposes. Also do navigation invokers work with level streaming? one of my sublevels spawned some NPCs with nav invokers attached, but there was no nav mesh update upon spawn

[wise iris]

Pretty sure they do work with level streaming, but I'm not familiar with the specifics. I stumbled upon some threads discussing it though, have a google. For instance: https://answers.unrealengine.com/questions/906568/nav-mesh-and-streaming-levels.html

[uneven shell]

oh heck. thank you! I'll do some digging about it

[uneven shell]

@wise iris I've been testing around some more, and I still have an issue about nav invokers - wether I spawn the NPC with invoker on Persisten level, or streamed one, it doesn't build nav mesh tiles until my player character reaches them. Any idea how to solve this? Can I force update nav mesh by blueprint on spawn somehow?

[wise iris]

You need an invoker on the AI

Not sure there's any other way

[fiery steppe]

So I'm very new at this AI stuff and didn't take long to run into a head scratching situation. Starting with a simple patrol AI. Have everything set up to where the patrol point variables change when the AI hits his spot. It all works as the variable switches to the 2nd patrol point. Everywhere but the behavior tree. On the BT it just stays PatrolPoint1 even though everything else switches to PatrolPoint2. What would cause the BT to ignore the changes?

[wise iris]

Good question, I imagine it would give you the default value in case it's configured as the other type in the blackboard 🤔

0,0,0 and nullptr

[misty wharf]

Anyone have any ideas on how you might be able to place EQS results away from edges? or rather, filter out things too close to an edge?

basically I'm trying to do a basic query that would produce spots that are available on the surface here... the ones you see on the right side are very close to the edge, and I'd rather they would not be counted as valid

[misty wharf]

also somewhat annoyingly my EQS queries in practice are producing different results than the EQS testing pawn and I can't for the life of me figure out why 🤦

[pine steeple]

well it takes into account the radius of the capsule

so if your navdata on testing pawn is different to the actor running the EQS, it can be different

also things like rotation etc play a part (if you are doing dots)

[misty wharf]

Yeah I wish there was a way to visualize it from the "live" query and not just the tester

[pine steeple]

you can

[misty wharf]

oh?

[pine steeple]

Gameplay Debugger EQS tab

[misty wharf]

Ohh right that thing that I forgot is a thing because it's so hidden

:P

[pine steeple]

you can even see the test results

with / and * to cycle different queries

[misty wharf]

yeah I remember using it for this at one point actually but I just forgot it existed lol

[pine steeple]

even Visual Logger

will show you the query and test results

[misty wharf]

wasn't having any luck with that with the visual logger 🤔

it was just showing all my ai controllers, no eqs info in there

[misty wharf]

Huh, I wonder why mine wasn't showing any of that

Yeah the EQS stuff definitely isn't showing up in the visual logger but at least it seems to work with gameplay debugger

well, I can tell the test fails because one of the bounds checks hits something but there's literally nothing it could hit where it supposedly hit something... :D

Oh wait I think I just realized what the problem is...

it's colliding literally with the item it's trying to place into the space the EQS is used to search :P because the item happens to end up within that general area before the query is ran... always something like this :D

wait no that's not it... I think I'm just gonna have to add logging into the EQS test to see what it's colliding with :P

[dusky yoke]

SOLVED: #gameplay-ai message

Hello. I'm having a problem with Ai Move to, succeeds on first call, then it aborts:

It seems to depend on the character collision capsule height. If it is fewer than 5, it happens the abort behaviour, if it is greater than 6, it succeeds.

Problem is i need it to be shorter than 5 because i want the character to be a small rat.

Any idea or solution? Have been with this problem like 5 hours, reading forums and testing, stuck in the capsule height problem because i don't understand why that happens

[dusky yoke]

SOLVED: #gameplay-ai message

This is the problem with having capsule height over 6, that the rat cannot go under small holes or gaps in the terrain. Tried to escale it, and reescale ingame, same problem

[misty grove]

yo - are there any built in tasks for just toggling a boolean Blackboard key?

like if i'm rallying my troops, i set the bRally key myself, and I want them to then move to point X, and unset the bRally themselves

seems lame to have to create a custom task just to toggle this value

[iron rose]

i have a question about how often blackboards update; it seems like when i change blackboard keys, my blackboard is still going down its previous path for two ticks

and when i set a breakpoint, the blackboard key information that my blackboard shows does not match what my "get blackboard value as object" call is returning

[glossy spire]

@iron rose if you're talking about the behavior tree, the decorators only serve to block entry by default, if you want to make them abort your tasks you have to set the Observer Aborts priority

that could be what you're seeing

[dusky yoke]

Solved, changed Cell Height here from 10 to 1

[stark zealot]

https://i.gyazo.com/1b70782a4c703cbcc116bd86084181e7.png

Does anyone know how to filter out points that are behind walls but can still be navigated to?

It's picking points in rooms through walls but you can't get to those rooms unless you go around the entire house. So an AI will run through the whole house just to get to a point, then run all the way back to get to another point. Is there a distance on nav mesh test or something?

[misty wharf]

you could do a line of sight check?

[stark zealot]

Is that the trace test?

[misty wharf]

that could be used to do it yeah

you could use it to filter out points that cannot be seen from where the querier is

[stark zealot]

But I'm trying to make it where he gets points behind things he can't see so he'll "investigate and search" for the player

Like looking behind doors, walls, etc

It works until he picks a point behind a wall that's in another room with no quick way to nav to it. These are the problem points: https://i.gyazo.com/ef23c16c00e3a87a4bc26c830ec62cc8.png

[iron rose]

i'm not using dectorators here for this, but i think i fuond the solution to my problem with some googling

https://unrealengine.com/id/authorize?client_id=c4c02c7c99e94ed9870a9dbeafab2c3f&response_type=code

this is almost the exact issue i'm running into

[misty wharf]

I guess you could create a custom test for navigation distance or something

[stark zealot]

You can make custom tests? I was looking for a way to do that

[misty wharf]

it's possible in C++ yeah

[stark zealot]

😢 Darn

[glossy spire]

there is a path distance test for eqs

[stark zealot]

I see it now!!!! @glossy spire I love you 🥳 Thanks

https://i.gyazo.com/65d6da4380c08b78de9a0d3144e87f5e.png

One little drop down

[misty wharf]

Oh there is?

Nice, I was working with EQS today and somehow I must have mentally ignored it in the list lol

It's worth looking into learning some C++ though if you're only working with BP's

especially EQS stuff becomes much more flexible when you can modify how generators or tests work because they just aren't all that flexible if you need them to do something they don't do out of the box

[stark zealot]

Yea I know I'll have to use one day. I just have bad flashbacks to my college days every time I open up Visual Studios. So many bad memories of stupid group projects and ridiculous assignments. I'm sure it's better now. I had to use 2008 back in the day maybe it's improved lol

[misty wharf]

lol

[stark zealot]

One last question out of curiosity. Can you change the Querier from the AI to another Actor? For example if I want my AI to use my player character as the source of a EQS query? That way he would get a point around me instead of around himself. I'm sure it's another checkbox or dropdown menu

[misty wharf]

the queries tend to work around the context object

so if you create a custom context which returns the object you want it to use instead, then that'd work

custom contexts can be created in BPs too

[stark zealot]

Ahh I see so I can make a new context and assign it to the EQS Query. I'm not sure how I'll tell the context that my character is the new Querier though. I also see you can run EQS queries with a node in blueprint and it lets you plug in the querier. So maybe I can use that in an ordinary task and call the EQS from that? IDK

[pine steeple]

well your AI will have its player

you can just make a contextquery to return that

[stark zealot]

I'm not sure I follow. I have my AI controller, my player pawn, and a context query blueprint. I can set my EQS query to use my custom context blueprint but what do I put inside the custom context blueprint to make it use my player pawn as the source of the EQS query instead of using the AI as it's source.

[misty wharf]

it has an overridable function called "provide single actor" or something like that... override it and have it return the actor you want to use as the context

[magic wyvern]

hey y'all so i'm a noob at unreal and was wondering if someone could help me out w/ something that might be relatively simple. So, I'm trying to get the thirdpersoncharacter to have a sightconfig perception so that when an enemy is in the players line of sight, the player character says a line of dialogue.

but i can't seem to get the character to actually have a line of sight for some reason.

my npc has it no problem, but in the debugger i can see that there is no perception on the player character.

i essentially want the CanBeSeen bool to switch on the AI's blackboard when that npc is visible by the player.

[frozen lichen]

So, when using navigation Ai rotates controller towards the movement target.
Can that be disabled?
Im trying to add strafing, but my aiming relies on control rotation.

Ok, nevermind, found it:

For those wondering:

AIController has SetFocalPoint and SetFocus.

[stark zealot]

@misty wharf That worked perfect. Thank you so much for your help. I got my AI working just like I want now. 🥳

[gilded fern]

Ive had this question on my mind and I have to get it out of the way

How do I start with machine learning?

[misty wharf]

google for machine learning tutorial I guess

that's how I'd start if I had no idea

[timber mortar]

how can i get my AI to stand still not doing anything for the first 30 seconds after begin play?

i tried the Task Wait Delay node in the AI controller BP

[timber mortar]

wait didn't work because either it would be ignored by the Tick event or would never finish because Tick happened instead.
i ended up just doing a time variable that increments, until it's >30

[pine steeple]

Run the visual logger

And see what is failing

It will log everything your controller and movement stuff is doing

@boreal stump

[boreal stump]

aand how do i turn that on?

the pawn moves fine with blueprints SimeMoveTo. but if i try the function MoveToLocation in the aicontroller c++, the pawns dont move.

i know its firing the beginplay function of the aicontroller with a simple log. so it appears the aicontroller is attached to pawn correctly

ok, the visual logger shows all sorts of stuff (sorry new to this tool, thank you) when i use the blueprint SimpleMoveTo. but when i detach that and try and run the code in c++ aicontroller class. the visual logger shows nothing. but my UE_LOG in the aicontroller prints out on beginplay and ticks, so it appears to be loading with the pawn

should i not be calling the MoveToLocation from the aicontroller, but from the AIPawn c++ class the blueprint inherits from?

called from parent c++ pawn class

aicontroller is attached

any ideas?

@pine steeple

[pine steeple]

Your moving onn begin play

That is way too early

[boreal stump]

it works when i fire the move from begin play in the blueprint

[boreal stump]

ok.... calling it from the tick works. but sounds wrong calling it from the tick. is that correct or where should i call the MoveToLocation from?

[boreal stump]

@pine steeple i want it to start right when the enemy "begins play" so where do you sugest i call this movetolocation?

[pine steeple]

sorry was out

you want to use something like PossessedBy

or OnPossess

this way both pawn and ai controller are ready

[boreal stump]

roger that. thank you. ill look into that. working on detecting when it gets to location now.

[boreal stump]

Thanks for the reply. I did get it to work after moving the "MoveToLocation" call into the tick of the AIController. trying to get it to work in OnPossess now, but no luck yet. crazy how hard it is so do such simple things

simple meaning basic things almost every game has

anyone know how i might detect if the actor is at location? calling GetPawn()->GetActorLocation() crashes my engine. Was going to compare that to the destination

[boreal stump]

just to help anyone else, ended up leaving the MoveToLocation in the Tick, and then checked if the current location == destination. if so then change the destination. works great.

[glass falcon]

what does root not initialized for behavior trees ?

[patent hornet]

@boreal stump i seriously doubt that, move to location is not supposed to be called on Tick

as to why it crashed, Controller and Pawn are instantiated, then call BeginPlay, then Possess happens

until Posess Controller has no Pawn and Pawn has no Controller

[proven wasp]

Hello everyone,
I'm building a MOBA type AI and having some problems with swapping to a new enemy. Are there any good resources that you know about it?

[coral spire]

Hi, anyone in here got experience with creating custom UBehaviorTreeGraphNode for your BT nodes? I'm getting bunch of error when creating child class via editor 😦

[timber mortar]

simplest way to stop AI from moving during a Cinematic/LevelSequence?

[pine steeple]

we have an AIDirector which has all spawned AI, we simply loop through all ai and call AI->PauseBehaviour

then when cinematics finish, we call AI->ResumeBehaviour

[timber mortar]

cool, thanks

[pine steeple]

those functions need to be defined tho

[timber mortar]

oh

[pine steeple]

we simply stop movement immediatelty and disable the brain (behaviour tree)

{
    if (AAIHeroController* NPCHeroController = GetController<AAIHeroController>())
    {
        UBrainComponent* const Brain = NPCHeroController->GetBrainComponent();
        if (Brain)
        {
            Brain->StopLogic("Disabled by code");
        }
        }
    GetCharacterMovement()->StopMovementImmediately();
}

void AAICharacterBase::ResumeAI()
{
    if (AAIHeroController* NPCHeroController = GetController<AAIHeroController>())
    {
        UBrainComponent* const Brain = NPCHeroController->GetBrainComponent();
        if (Brain)
        {
            Brain->RestartLogic();
        }
        }
}

for example

[timber mortar]

oh so it's all custom stuff

[pine steeple]

ofc, welcome to the world of AI

if your BP only, you can still do it

[timber mortar]

i'm using a Behaviour Tree

[pine steeple]

the above code will stop and restart behaviour tree

[timber mortar]

oh right cool i thought brain was something u made

[pine steeple]

no

[timber mortar]

this is what i came up with, thanks tho

[quiet fiber]

is there a way to get AI to ignore each other when pathfinding/moving. I'm making a 3D sidescroller and want the enemies to be able to pass through each other when moving. I've disabled collision on them and that does allow them to technically pass through each other, but any sort of pathfinding behaves as if they can block each other.

I've set them to not ever effect navigation and set their area class to none

[timber mortar]

so when you press p, theres no gaps beneath the AI?

my AI ignore each other even if i would like them not to

[quiet fiber]

there are no gaps

the stationary character is the parent class, just to show that the enemies do actually pass through each other if they both aren't trying to move

they dont have RVO avoidance activated either

[quiet fiber]

got it, turns out avoidance groups still effect AI even if RVO is disabled

[pine steeple]

That is just terrible

and an abuse of tick

but 🤷

[vale notch]

I have a question about the Simple Parallel node in the behavior tree. I was thinking if you have an NPC sitting in a chair, you could use a Simple Parallel that continuously checks if the chair is still there. And if the chair is destroyed, maybe in an FPS, or it is sold or moved, in some top-down game, it will return null and the NPC will know to stand up?
So my question is, is that a reasonable use of the Simple Parallel node, or would you rather have the chair object just tell the NPC "hey, i'm being removed, get up"? 🤔

Also, if you're using the Simple Parallel for something specific in your project, I'd like to hear it, so that I can understand its usage better. 😉

[misty wharf]

at least to me it sounds more reasonable that the npc would have this information via an event yeah

[vale notch]

So just telling it once rather than checking all the time? I kinda figured that should be the case. Which is why I don't really get the usage case for Simple Parallel... 🤔

I guess it's mostly useful for stuff like chasing the player, where the location needs updating all the time then. 🤔

[patent hornet]

not really

you can just move to actor with goal tracking

and then its just follows

[vale notch]

Right, so it's not even useful for that then... what the hell. 😅

[patent hornet]

one of our simple parallel examples is in mission system, which we run via BTs

mission objective that you need to complete is main task

while the parallel task does sequence -> spawn ambush - wait

[vale notch]

Hmm alright, interesting! So it's not really being run every frame, it's just running two things at once... that does sound more useful

[patent hornet]

the secondary task runs until the primary task fails or succeeds

[vale notch]

Right, so it's able to keep spawning waves of enemies for you until the player completes the mission. That's a great example, thank you 🙂

[timber mortar]

it doesn't even work 🥲 but so far this is the only thing that has...

[pine steeple]

why would it work and why you using tick?

[timber mortar]

A) because the cinematic is 60s long so it just waits 60s...
B) because thats what the tutorial said when i began and it has worked thus far

i have heard tick is inefficient but not sure why

@pine steeple i get an error (accessed None trying to read BrainComponent) when attempting your suggestion in BP

[vale notch]

Oh dear god. Why would you run a behaviour tree from a tick node!?

[vale notch]

It is inefficient because every single frame once 60 seconds have passed in your game, you are executing the behavior tree. That's typically 60 times every single second for the rest of your game. You only need to start the behavior tree once. 😅

[timber mortar]

ohhh shit fr? 😂

[vale notch]

yup 😄

[timber mortar]

that makes things simpler, thanks

[vale notch]

Tick nodes are extremely useful for testing purposes because you are guaranteed to have something happen every frame, but they should really be avoided as much as possible. 🙂

[glass falcon]

is anyone else having an issue with perception and noise

its supposed to only detect enemies

but is detecting itself

while sight works fine

[vale notch]

I'm not particularly experienced with the perception modules, but you should be able to check who the instigator of the noise is to determine if it's an enemy or not I figure?

[glass falcon]

im using this

and have overidden the generic team ID in c++

so with these settings

its supposed to only detect enemies

i.e. people on different teams

[quiet fiber]

any secret methods of calculating if the player is reachable? The solutions I have found are based on whether or not the player is on a navmesh rather than anything that actually checks to see if the enemy can reach the player or not i.e across a gap that the AI cant clear

[vale notch]

That does seem odd then. Can't you use this node maybe to verify if it's an enemy?

[vale notch]

Are you using a behavior tree? In that case you can just use the Does Path Exist decorator. Otherwise... maybe you could use Find Path to Actor Synchronously?

[quiet fiber]

I'll have a look at the decorator, thank you

[charred lava]

Project Settings | Navigation Mesh
Is Runtime Generation = Dynamic Modifiers Only bugged?
My Character Capsule collider is set to block nav as a obstacle and instead it removes navigation surrounding him.
Setting it to Dynamic is fine, but Dynamic Modifiers Only seemed to be the more performant way.

When googling about it, some say it doesn't work in newer engine versions. Does someone know more about it?

[glass falcon]

In the end I just decided to check if the actor is in the enemy team, i'm not using that node in particular so i don't have to iterate over all perceived actors

[vale notch]

Right, all good so long as it works 🙂

[verbal violet]

Hi folks, i want to repeat question from few days ago from animation channel, sorry admins if I broke some rule, but after all I think that this chanel is better place to ask this.
I'm use StopLogic and StartLogic for BrainComponent when play some montages (stagger or some attack from run).
Problem appears after StartLogic. All my cooldowns is reseted also. So this my Attack from run, which should appears very rare, repeats in infinity.

I've seen there is PauseLogic and ResumeLogic in BrainComponent script but that is not exposed

[pine steeple]

dont stop and start the logic

@verbal violet

if you do, keep all the cooldowns external to the behaviour tree (like in the AI's controller)

otherwise use a bool blackboard key and abort your lower priorities whilst in a stunned/staggered state, and have the behaviour tree wait in a task the never returns, and that itself is gated

which will abort self when the bool is set to false for example

[verbal violet]

@pine steeple "otherwise use a bool blackboard key and abort your lower priorities whilst in a stunned/staggered state" actually it's good idea, nice and clean and simple way tnx

[uncut python]

hi everyone, is there any reason why my ai wont reach the max speed that I set? they walk much slower than what ive set in both the details panel and by setting Max Walk Speed at begin play

[violet merlin]

why set the walk speed in two different places?

[glass falcon]

the task isnt aborting once target actor is set [EDIT] fixed

[uncut python]

i just saw it in the sidebar and thought it would help, but I guess the blueprint i made oversrides that anyway

so the max walk speed is set to 533 it just wont reach that speed for some reason

[waxen junco]

how do you make actual decent pathfinding? I have this one platform above the ground, and if I increase the settings like step height and stuff to let them walk off of it, theyre then unable to walk underneath it without getting stuck to the spot

navmesh is just being so unhelpful

[misty wharf]

you might need to use navlinks or smart navlinks if you want them to be able to drop off things like that

they need manual placing, but afaik UT generates those automatically in some fashion so it should be possible to autogenerate them as well

(but somehow I get the feeling it's nontrivial)

[waxen junco]

I heard about navlink stuff but it sounds kinda useless

like its not really feasible to place them on every single ledge

seems pretty stupid that you cant just tell the ai to be able to run off ledges

man its just impossible to make reliable ai isnt it

[waxen junco]

you know what, Im just gonna make the ai detect ledges with a trace and automatically run off every ledge they come to, it will obviously result in their own death a lot of the time but its better than them just standing there doing nothing

[misty wharf]

yeah navigation is challenging to do if you need it to be especially smart

[waxen junco]

well I dont think my game is gonna be a game at all without enemies

so ideally they need to be a bit less braindead

does unreal not have any support for actual ai jumping and stuff or is it all just 2d navigation

like if I simply jump up onto a platform, how am I supposed to tell the ai to do the same? all Ive got is some sphere trace to detect walls and automatically jump which is obviously awful

[pine steeple]

you use navlink proxies 😄

and generate them automatically if you have a lot

i am assuming that is how fortnite do it for there ai

(they jump up on things

and drop down

i am really wondering if i can pull the UT4 code about

and create a little plugin that has this option

and how long that would take

[waxen junco]

but how do you generate them automatically? I never heard of that

[pine steeple]

in code

[misty wharf]

unless your level is huge you can set them up manually pretty easily too

yeah it's a bit of manual work that feels like it shouldn't be needed but ¯_(ツ)_/¯

[waxen junco]

very impractical

[waxen junco]

do you mean as in program it or specifically code and not bp

[misty wharf]

yeah I mean you can just create one and then dupe it a few times, but yeah it's not the best

[waxen junco]

hmm ok well I feel like this is gonna make me a lot lazier with map design as Ill be wanting to avoid things ai will struggle with

[misty wharf]

and yeah, if you wanted to autogenerate it, you'd have to do it in C++ as I don't think the apis are available in BP's

[waxen junco]

oh

well I dont know a single line of c++

[misty wharf]

you could potentially make some editor utilities to help place them manually

for example if you configure one for that big ledge, then you could have a utility that allows you to easily duplicate it

or edit multiple ones at the same time or something

this should be doable without C++, but it kinda depends on how much work it would be to manually do it on whether it'd be worth building the tooling

[waxen junco]

oh I just realised

one of the main things I wanted to do for this game was random map generation so this wouldnt help me at all anyway

[misty wharf]

Oh dear :)

Time to start learning C++ I guess

[waxen junco]

oh no chance

[lyric flint]

Environment Queries are not instantaneous right? they take some frames to be performed?

[pine steeple]

correct

there is a callback when its done

[wise iris]

Anyone ever get these weird disconnected navmeshes on a landscape?

[pine steeple]

is it disconnected ot just visual

cause we see a lot of visual artifacts with the drawing but otherwise fine to navigate @wise iris

[wise iris]

Good point 🤔 I did notice some jitter/getting stuck in certain areas, but wasn't sure it was because of this or something on my end.

Good to hear it could be just visual though

I had been adjusting the cell height of the nav mesh so it would work with a really large bounds, thought that might have been it

[wise iris]

Is there any chance that nav settings in project settings are overwritten by something when packaged? My AI walks around during PIE, but not while packaged.

Makes it a bit trickier that it's on dedicated server, so navmesh preview might be tricky

[misty wharf]

afaik if you have a navmesh in your level that may affect it

as it has its own settings separate from the project settings

[wise iris]

Right, but works in editor 🤔

[misty wharf]

if you delete it and let it regenerate, it should receive the project settings by default

[wise iris]

They're frozen in place in packaged though

Tried this, but no luck: https://answers.unrealengine.com/questions/275266/ai-doesnt-move-in-packaged-game.html

[misty wharf]

if you're doing any runtime stuff that requires navigation generation then it could be really anything, it seems to be a can of worms lol

[wise iris]

Yeah they use invokers

From what I can tell with gameplay debugger, the move node fails

So it does seem to be something navmesh related 🤔

Hmm, could this be a streaming issue? The navmesh bounds is on the streamed level it seems like

[misty wharf]

I haven't used level streaming but I have definitely heard that it can affect that if the bounds is on the streamed level

[wise iris]

The actual Recast actor seems to be on the persistent level 🤔

[wise iris]

Should be on persistent?

[misty wharf]

Worth trying at least

[wise iris]

True 😄

Lemme try

[wise iris]

Nope

Aha, even a non-streamed level has the same issue, so has to be something else with the navmesh 🤔

[uneven shell]

Hey guys, sometimes my AI characters seem to reach their MoveTo location, but then get stuck there for a couple of seconds before aborting. I checked the distance to their target location in Tick by DrawDebugString and it's always lower than the one I stated both in IsAtLocation decorator and the MoveTo task itself. Somehow it's just not detecting that the distance is short enough to proceed in Behavior Tree. Any idea what's happening? I tried playing with IsAtLocation parameters but it doesn't seem to work

Both MoveTo and IsAtLocation have acceptable radius of 75, while the actual distance is around 50

I'm using 4.25 version

[uneven shell]

I also checked if pawn is overlaping car door, and it does. What can be wrong?

[flint trail]

I am trying to have AI NPC to aim at me (both pitch and yaw) using Aim Offset. I followed some tutorials online (although they only use pitch, not yaw) and I am in a pickle with aiming on yaw. Basically what they did was they took start vector (hand bone for example) and end vector (player) and got look at rotator, split it and pulled pitch from it. If I do the same for yaw, it doesn't quite work because it's an absolute value. I am wondering how can I convert it into "local" value. Like, when AI looks at player, yaw should always be zero. And then as player moves to the side and AI "turns" (rather calculates yaw and feeds it to aim offset) reaching max or min value, yaw gets reset back to zero. If that makes sense.

How do I do that in BP ?

[misty wharf]

If there's any custom nav link gurus around - how do you handle moving pawns through them? I'm rapidly discovering this is completely full of gotchas unless you literally manually lerp the pawn to its destination which feels... clunky. A DetourCrowd based AI controller just stops at the first sight of a nav link for example...

If you attempt to have the AI simply MoveTo the destination without pathfinding, that still overrides its previous pathing, leading to the previous move request failing... which complicates things like behavior trees where you're trying to have it move somewhere

But a regular PathFollowingComponent will happily path through the navlink as if just navigating normally which is sometimes desirable and definitely nicer than manually lerping it through the link

[pine steeple]

@misty wharf come again? 😄

[misty wharf]

My thoughts exactly

[pine steeple]

i use detour with custom navlinks

for things like vaulting over barricades etc

jumping through windows

[misty wharf]

So how are you handling those kinds of movements? Just lerping it while it animates or something?

[pine steeple]

rootmotion sources, root motion montages, w/e i need

vaulting is a root motion montage for example

[misty wharf]

Right, maybe I need to look into something like that then, all I want mine to do is walk to the destination lol

[pine steeple]

i mean

you can make an AI reach a navlink

then assume manual control and send manual movements to the AI

i do this for things like them using ziplines

they reach the navlink, i manually move them to position

then start the zipline

[misty wharf]

Yeah that's what I'm looking at doing currently

probably just see if I can tell the CMC to move it or something

[pine steeple]

i have a custom Navlink component

you can

ill get the function

so the PFC calls into the CMC

and this function ```void UCharacterMovementComponent::RequestPathMove(const FVector& MoveInput)

MoveInput being manual move input (like as if you are pressing W-A-S-D keys

[misty wharf]

Interesting

Will have to give that a go

[pine steeple]

we do this to recover players

who walk out of navmesh

{
    const FVector CurrentMoveInput = (CachedRecoveryLoc - Hero->GetActorLocation()).GetSafeNormal();
    Hero->GetCharacterMovement()->RequestPathMove(CurrentMoveInput);```

[misty wharf]

Yeah makes sense... this is just another seemingly quite complicated part that has barely any documentation outside of very basic things so it's a bit like.. wtf do I do to make this work lol

thanks, something like that'll probably work... just need to manually keep track of it ending up at its destination I guess but that's not too complicated

[pine steeple]

right i mean its not super straightforward

we have a custom NavlinkComponent

which we have a enum for the type of link it is

and we can adjust what happens for each type of monster at that link

(different AI do different things at vaults for example)

[misty wharf]

I think I thankfully won't need much else than doors :D

[pine steeple]

yeah we don't navlink our doors

we modify the volume under the door

so if player closes door monsters will break the door to gain entry

[misty wharf]

Interesting, they get a different behavior when entering a different type of nav volume?

[pine steeple]

yup

[misty wharf]

Good to know that's a thing

[pine steeple]

not sure its really a thing per say

but its doable like we did 😄

[misty wharf]

I'm not sure if I'd even really need links on the doors, I just was under the mistaken impression that it would be easy to trigger an animation based on when the door link is being entered and exited lol

[pine steeple]

i mean links make sense if the door breaks the navmesh

when closed

(which is a viable option)

you turn the navlink on/off

based on the door state

[misty wharf]

Yeah

[pine steeple]

problem with that i found

[misty wharf]

I might have a locked door at some point, but I don't really want the npc's to have precognition and not even attempt the locked door... so that'll be a fun exercise to figure out I'm sure :)

[pine steeple]

only one ai can use a link at time properly

does not allow 5-10 monsters to attack the door same time

[misty wharf]

Oh really, it looks like they should support multiple using it at the same time

[pine steeple]

they do

if you move the AI away from the actual link point

so other AI can reach the link point to trigger it

[misty wharf]

Ahh right

[pine steeple]

that was my first try with it

[misty wharf]

Yeah I can imagine in your situation that wouldn't work so well say if you wanted them to attack from multiple angles or something

[pine steeple]

right exactly

[misty wharf]

any idea if you can store per agent info somehow for the navmesh? Eg. if you have a door that's locked, but the agent doesn't have this info until it tries to walk into it

not even sure if that'd be the best way to do something like that tbh

[pine steeple]

you can't really

the link can broadcast out periodically that is relevant

but in a very small radius

if you are on about that

start with the link disabled

then broadcast the link active state in a very small radius

meaning AI has to be close to it to know that link is actually open

[misty wharf]

Yeah I think it'd have to start in an open state for the agent to try to path through it, and once it reaches it it would recognize it as not being relevant

but something like that could work I guess if it allows the agents to have their individual knowledge of link relevancy

[pine steeple]

just remember

if you turn a link on/off

    for (UPathFollowingComponent* Comp : NearbyAgents)
    {
        if (!IsEnabled())
        {
            //If they have this link, then we tell them to repath. We don't want to repath
            //any ai that never had this link for performance reasons.
            if (Comp->GetPath().IsValid() && Comp->GetPath()->ContainsCustomLink(GetNavLinkID()))
            {
                Comp->GetPath()->Invalidate();
            }
        }
        else
        {
            //We tell all nearby ai's this link is now open. Maybe they can use it
            if (Comp->GetPath().IsValid())
            {
                Comp->GetPath()->Invalidate();
            }
        }
    }``` this is crucial

[misty wharf]

Yeah

[pine steeple]

this is not in the engien

something me and @smoky summit came up with

as we had issues of opening navlinks and AI not using them

or closing them and they still used them

[misty wharf]

I kinda assumed it would store the link information as part of the overall navmesh data so if you turned it off it'd just regenerate

[pine steeple]

no

and yes

trust me

[misty wharf]

lol

[pine steeple]

this AI system and navmesh

Nightmare

[misty wharf]

:D

[pine steeple]

2+ years

and im still fighting weirdness to this day

[misty wharf]

yeah it seems kinda complicated to get some of this working... I'm thinking of just making my npc pawns overlap each other sometimes to alleviate some pathfinding/avoidance problems

[pine steeple]

want to make a custom null navmodifier that only affects agents on a specific navmesh?

good luck.

[misty wharf]

probably gonna have to make them nonblocking when they traverse the doors because I'm sure they will otherwise get stuck :D

[pine steeple]

had to hardcode this just cause the engine has a bug

    {
        return;
    }
    Super::OnNavAreaAdded(NavAreaClass, AgentIndex);```

[smoky summit]

🙂

[pine steeple]

sure there is a more elegant way

but yeah

tried doing SupportedAgents.Empty(); SupportedAgents.Set(0); SupportedAgents.Set(1); but nope it decides it wants to set all the bits 😄

[wise iris]

Aha, ran the server as listen server. Getting closer

That seems to confirm an issue with the navmesh

How odd that it works fine in editor, but screwed up in packaged

It's generated though...seems to show up fine, even in packaged

[pine steeple]

@wise iris you don't have multiple navmesh bounds do you?

only one navmesh bounds may exist in a world

[wise iris]

I do in this case, but had not before. It also worked fine with multiple navmesh bounds before in packaged, I tested 🤔

[pine steeple]

we had issues where multiple bounds broke in shipping

when we switched to single bounds

issue went away

our navmesh is also dynamic

not static

[wise iris]

Interesting, I'll double check. I did also run a test with just one though. Think there's more fuckery going on

Right yes, invokers

Same here

Are you changing the cell height at all?

[pine steeple]

we spent years tweaking the nav mesh settings

but we don't use invokers

[wise iris]

Oh god 😄

[pine steeple]

cause we have bounds

and the navmesh is generated

invokers is when you dont build the navmesh but want to dynamically make the navmesh as they move right?

[wise iris]

Yes, exactly

20km x 20km, so gotta

(I assume)

You still need bounds in that case though

[pine steeple]

and you set the option correctly

for nav invokers with streaming levels

[wise iris]

I actually stepped back to using a non-streamed level to isolate the issue

[pine steeple]

and also used

http://www.thegames.dev/snaps/UE4Editor-Win64-DebugGame_QK5O9oQHMj.png

ie ticked this

[wise iris]

I think I actually might have the reason

I use two different types of nav data. In editor, I can seemingly switch fine between the two

[pine steeple]

two different types?

[wise iris]

But in packaged, I can't seem to switch back to recast

Err, hold on

[pine steeple]

why do you have two different types?

[wise iris]

Flying + walking nav

Hold on

[pine steeple]

o_0

i did my flying AI without using navmesh per say

was a long simpler 😄

[wise iris]

https://www.unrealengine.com/marketplace/en-US/product/flying-navigation-system 😉

[pine steeple]

i saw it

its quite recent

i did my flying ai over a year ago

my flying ai actually works fine

without needing to do "3D path finding"

[wise iris]

Any idea why recast might be unavailable? Maybe it's stripped if no actor has it enabled by default or something odd like that?

[pine steeple]

i use EQS and stuff

yes

[wise iris]

Hmmm 🤔

[pine steeple]

check your settings here

http://www.thegames.dev/snaps/UE4Editor-Win64-DebugGame_Lm1UMlezMl.png

and here

there is also

http://www.thegames.dev/snaps/UE4Editor-Win64-DebugGame_Rf3QVgAH89.png

[wise iris]

Hmmm

I do not have spawn nav data in nav bounds level checked, though I can't imagine that changes anything because I'm using a single level, nothing streamed

So close I can practically smell the solution though

For sure it's the fact that it doesn't want to switch back to recast

I wonder if this soft object path is screwed up during packaging

Yep...the plot thickens....

[misty wharf]

@pine steeple thank for the help - got it working pretty well now with RequestPathMove with a controller that then broadcasts an event once the "manual" move destination is reached, which then triggers resume movement from the nav link :)

[pine steeple]

nice

[wise iris]

In editor also "none"

The hell!

[pine steeple]

maybe its not being loaded

cause nothing loaded the asset

as its a soft pointer

[wise iris]

bool UNavigationFunctions::SetPreferredNavigationData(APawn* Pawn, FSoftClassPath PreferredNavigationData)
{
    if (!Pawn)
        return false;

    UPawnMovementComponent* PawnMovement = Pawn->GetMovementComponent();

    if (!PawnMovement)
        return false;

    FNavAgentProperties& NavAgentProperties = PawnMovement->GetNavAgentPropertiesRef();

    NavAgentProperties.PreferredNavData = PreferredNavigationData;
    PawnMovement->ResetMoveState();

    return true;
}

[pine steeple]

it will need to be loaded

[wise iris]

Actually not a pointer

Did I screw that up?

[pine steeple]

its a soft class

but you never loaded it

[wise iris]

Oh balls

[pine steeple]

and the engine wont load it

need to load the soft class

then set it

[wise iris]

Maybe I should use this function?

On the props

(after loading)

[pine steeple]

right but that still wont load it

you need to call PrefferedNavigationData.TryLoadClass()

[wise iris]

TSubclassOf<AActor>* NavActorClass = PreferredNavigationData.TryLoadClass<AActor>();
NavAgentProperties.SetPreferredNavData( NavActorClass );

Trying that now

😆

[pine steeple]

what is the path?

cause the path name says "None"

meaning there is no valid path passed in

[wise iris]

This

[pine steeple]

yes but the path name in the debugger

says "None"

[wise iris]

Yeah 🤔

I wonder if that's not a valid way of finding recast

Got rid of the soft pointer, debug looks better. Repackaging to test now

Hell yeah, works! 🤘

Cheers for thinking along Kaos, helped get the juices flowing

😄

(Still puzzled beyond relief why it worked in the editor, but eh...)

[flint imp]

Im trying to optimize a large number of AI in multiplayer, is there a way where the AI controller will only be active if one of the players are actually rendering the AI, it's a waste to always have the AI controller active chewing out your pc

[flint trail]

can anyone please help out with aim offset on AI ?

[flint trail]

right now I am getting any base aim value from 0 to 360 or I can normalize axis to -180 to 180

my aim offset has 3 poses for yaw: -45, 0 and 45 deg.

0 is when AI should be aiming square at player

so when aim angle will get to one of the extremes, actor will rotate so legs could catch up with torso.

basically I need to reset, so to speak, from whatever angle AI is aiming at on yaw to 0 when it reaches -45 or 45

[pine steeple]

@flint trail so your basically doing turn in place

you want the ai to carry on rotating

but you want to want to counter rotate the root bone in your animgraph

once the extreme hits, you want to interp the root bone to match the capsules rotation

that is the best way to do it

for example if (bStandingStill) { const FVector ForwardInverseNormalized = ActorTransform.InverseTransformVectorNoScale(ForwardVectorYawReference).GetSafeNormal(); ActorYawOffset = Atan2Deg(ForwardInverseNormalized.Y, ForwardInverseNormalized.X) * -1.f; } else { ActorYawOffset = 0.f; } ActorYawOffset will be the counter rotation for the rootbone

then you do something like if (FMath::Abs(ActorYawOffset) > 44.f) { if (!bActuallyTurningInPlaceGate) { bActuallyTurningInPlaceGate = true; bTurningInPlace = true; ActorYawOffsetReductionStartTime = GetWorld()->GetTimeSeconds(); bTurningInPlaceLeft = ActorYawOffset < 0.f; TurnInPlaceInitiated(); } } and then use a curve to rotate the legs round (curve adjusted to match animation or you can maybe pull the curve from the animation) if (bTurningInPlace) { ActorYawOffsetReductionCurrentTime = GetWorld()->GetTimeSeconds() - ActorYawOffsetReductionStartTime; UCurveFloat* RotationCurve = bTurningInPlaceLeft ? RotateInPlace90L : RotateInPlace90R; if (RotationCurve) { ActorYawOffset = RotationCurve->GetFloatValue(ActorYawOffsetReductionCurrentTime); } }

[flint trail]

well, I don't C++ 😦

also I am trying to feed controller rotation to aim offset and when it gets to extreme, rotate actor (which will let legs and torso to catch up)

there is no root bone manipulation involved. Just layered blend per bone at spine 1 and anim montages

(and aim offset)

I am thinking I need to map to range maybe dynamically

so when ai controller rotates to one of the extremes, range gets remapped so that extreme (-45 or 45) becomes 0

I am not sure how to do that. I tried map to range clamped and that didn't work

what you are talking about is more complicated and ignores aim offset

[pine steeple]

you need to counter rotate the root bone

that is how TIP works

and mine does not ignore aim offsets

[simple crest]

I'm not sure why you would counter rotate the root bone instead of just controlling your character rotation, or... I can't remember does the AI Perception component follow the character rotation instead of the controller rotation? 😄

[flint trail]

I already have simple turn in place working without any root bone

what I am talking about is getting aim yaw and feeding it into aim offset for torso

I use this https://docs.unrealengine.com/en-US/BlueprintAPI/Pawn/GetBaseAimRotation/index.html to get aim angles

also tried this https://docs.unrealengine.com/en-US/BlueprintAPI/Pawn/GetControlRotation/index.html

both return values from 0 to 360 or if I normalize axis, -180 to 180. So far I am failing to set 0 to the current aim after hitting extremes or finishing turning in place. As if those rotations are hard set to always be absolute, referencing the world.

my aim offset is -45 to 45

[simple crest]

You need to override the movement component code that actually turns the character. I'm not sure if it can be done in BP, haven't looked. And as I mentioned above, not sure if default perception component will use controller rotation or actor rotation so I don't want to lead you down a bad path

[flint trail]

AI Perception doesn't really have anything to do with rotation/ aiming

I guess I could setup aim offset if extreme poses to be at -180 and 180 and while skel mesh deformation will look horrible, if I only allow aim offset to work between -45 and 45, and then do TIP to catch up, it should look fine

I just didn't want to go that route

[simple crest]

It sounds like you're having trouble coming up with functional logic, so here's a thought

• controller should be thought of as providing the desired look direction. Use control rotation to set a desired look direction variable on your character
• character should control their current look direction, on tick lerping towards desired look direction
• character movement component should maintain desired character rotation and current character rotation, and should control both, checking on tick if the current look direction is beyond aim offset threshold and if so, calculate new desired character rotation and on tick lerp current rotation towards desired

Somewhere in all that (or in anim BP), you calculate aim offset as the difference between current look direction and current character rotation

[flint trail]

you don't do lerp with aim offset

it's there for your torso to aim in real time

I haven't seen too many tutorials about it on youtube, and whatever is available simply doesn't work

I already use lerp for TIP, it works fine

[simple crest]

Let me be clear I've done all this (for a player character that could be AI controlled but I just never got into AI dev for it)

You obviously don't have a fully thought out solution yet, the above is roughly what I did

[flint trail]

I think there is a miscommunication going on 😦

and I can't dig up any UE4 examples (videos) showing what I am after

forget TIP for a moment

[simple crest]

I mean it sounds like you want a character that uses aim offset to look around and TIP when it looks too far... Simple enough?

[flint trail]

think of player character and its aim offset

when you aim and shoot, you feed input data to aim offset on tick, basically

I need the same realtime stream of data fed to AI's aim offset when it's attacking target

and so far the only way I found to do so is by getting controller rotation (or base aim) when doing focus on target

[simple crest]

What I'm telling you is that your entire character is (or rather sounds like it is) poorly designed. There should be no difference between an AI controlled and player controlled character

[flint trail]

but there is

[simple crest]

No, there isn't lol

[flint trail]

okay

[simple crest]

[pine steeple]

our AI and Player TIP is the same @simple crest

same logic

with aimoffsets

we do our TIP tho by counter rotating the root bone in the AnimBP and allowing the capsule to freely turn

so the root bone stays stationary, aimoffset does the actual looking, when the extremes are reached we hop the feet around to the capsule rotation by undoing the root bone rotation via a curve

i explained this earlier tho

this was the method Laurent Delayron or w/e his name at Epic suggested to me

and what they do in Fortnite and did in Paragon

[simple crest]

yeah, I did the opposite as I don't like "turn/counter-unturn" solutions, feels hacky 😄 but maybe there's a reason for it when it comes to AI

https://i.gyazo.com/0e2de4cd7985e6f61a589300bc64a6ed.mp4

[pine steeple]

i mean UT4 did it with actual animations

that held the root bone center

http://www.thegames.dev/snaps/nF6Ddm17mB.mp4

[simple crest]

how come you got a discord embed and i didn't lol

[wise iris]

Doesn't play tho :\

(Unless opened in browser)

[pine steeple]

ye

[simple crest]

anyway @flint trail ... ^ ¯_(ツ)_/¯

in my gif the character capsule dir always matches the legs/lower torso orientation

[pine steeple]

my capsule always rotates so the actor forward is always forward

[simple crest]

i guess in Kaos's it would always match the upper torso orientation

[pine steeple]

yup

the head always is forward with the capsule

[simple crest]

yeah it looks like the default perception sight sense is coded to use GetActorEyesViewPoint which returns Actor's rotation, so for me I'd just have to override that to return my offset look direction... functionally probably not much difference between the two approaches past that

[flint trail]

I am using VRE plugin. It has modified AI Perception where you can specify a socket on skeletal mesh to be actual eyes

but I am glad you guys solved it for your projects

[flint trail]

@simple crest is this the set up you use for AI's aim offset https://docs.unrealengine.com/en-US/AnimatingObjects/SkeletalMeshAnimation/AnimHowTo/AimOffset/index.html ?

[junior hare]

Anyone experiencing issues with their AI in 4.26 where the behavior tree just seemingly stops ticking? We just moved over to this Engine version and can't seem to pin down the reasoning for it. (4.25 did not have this issue)

[simple crest]

@flint trail well yeah except I'd clarify to say it's for the character's aim offset. There is no "AI" or "player" aim offset, just the character's aim offset

[flint trail]

I don't have a visual model for my player character, so I don't have an example, so to speak

cuz it's a VR project (single player)

I still don't get why RIterp is used, but I'll give it a spin after work. Thanks @simple crest

[molten quiver]

Hi, currently using floating pawn movement to move my AI. I don't want the rotation to however look at the direction it's moving at.

I have a set focus node as well.

[pine steeple]

floating pawn movement orients to movement

only way to change iirc is to create a custom movemement component in c++ and modify the rotation @molten quiver

unless there is options inside the FPM

[celest python]

Isnt it just bUseControllerYaw ? @pine steeple

[pine steeple]

If the movement component does not override it

Never really used pawn floating comp

[celest python]

Its just updating the velocity and does nothing more, does not even provide a little bit option to improve the feeling of movement 😄

[pine steeple]

Path following comp might do tho

infact i know it does 😄

iirc it sets the control rotation to the path

[molten quiver]

Yeah orient rotation towards movement seems to only be a variable inside character movement component

[celest python]

Are you using FPM on Character?

[celest python]

I might be wrong but afaik it only does that if bUseControllerYaw is true

[molten quiver]

Most of our enemies are ships in a top down setting. So we thought we’d use fpm

They are pawns

I’ve tried that

[celest python]

I understand, FPM is a good idea depending on your desired movement capabilities but for a smooth feeling of movement you might need to tweak it a little

[devout plume]

iirc there's one too in your entity BP too (the "self" thing)

use controller rotation or something like that

I also had some success overriding the "facerotation" method #animation message

Had to do that cause my movement was driven by rootmotion

[molten quiver]

So you’re manually adjusting where it’s going to look?

From desired rotation

Wouldn’t the set focus service do that as well?