multiplayer

[plucky prawn]

because you cant get the player controller from the player state

isnt that C++ only?

[daring egret]

of course you can, just cast the owner

but there should just be a function for it

[plucky prawn]

so these hand things are like unit spawners in the game?

[daring egret]

casting the owner is exactly what get player controller would do fyi, there's nothing wrong at all with that

[stable marsh]

No, the player clicks a zone/point and a unit spawns (for now)

[plucky prawn]

ye right... cpp class APlayerController* APlayerState::GetPlayerController() const { return Cast<APlayerController>(GetOwner()); }

[stable marsh]

the red lines on the left are debug lines for tracing from player

[daring egret]

yeah figured as much tbh

[stable marsh]

Just consider the hand a unit as well

[plucky prawn]

so whats this menu for then? because depending on what you are doing you can significantly reduce the complexity of how you replicate data

[stable marsh]

Prototyping for card/unit selection. You have x options of unit types, you select a unit you want to spawn, you then place the card (or select the point) that they should spawn

That all seems like it should be client side until the unit actually gets spawned

or at the very least, work -_-

[plucky prawn]

right but what does this menu belong to? is it the hands or that weird mangled blue thing or the player?

[stable marsh]

the camera (your screen/player controller)

[daring egret]

rts rock paper scissors? haha

[stable marsh]

yup lol

[plucky prawn]

😑 what do the buttons on the ui change

what is the unit being set on

[stable marsh]

If I select hand, when I select a tile, a hand will spawn there. If I select rock, then I select a tile, a rock will spawn there, etc...

So the UI tells the player controller what int to use here:

[plucky prawn]

but this is supposed to be replicated? so if player A selects a hand and player B clicks on a tile it will spawn a hand?

[stable marsh]

nope it retains the logic correctly, except for the client. The problem I'm having is the UI, specifically on the client (player 2) is not changing the unit to whatever player 2 selected - so when they click on a tile, the default int (in this case happens to be "1") spawns a hand... always

[plucky prawn]

so this isnt a network issue but a widget issue?

[stable marsh]

I guess? But when I debug to see "who am I!?" the values are correct. Until the spawn logic/function occurs

The server/client is PlayerController_C_0, the client is PlayerController_C_0, when I do things on the hud it says I'm affecting PlayerController_0 (which makes sense because it's local). What doesn't make sense is this:

[plucky prawn]

why isnt the unit type a parameter of the function

[stable marsh]

Doesn't retain the value into this function (on player 2):

What do you mean

[plucky prawn]

this is purely a design nit-pick but generally your "setter" functions will take the value being set

so Set Unit Type (unit type) would be your function

where is your unit type being set

Unit int or whatever it says

[stable marsh]

I was copy pasting from rep w/notify generated by the widget lol

to test on a Set Unit Type function instead of Rep W/Notify here:
(the Unit Int was replicated instead previously)

[stable marsh]

on the widget

[plucky prawn]

then you send this to the server to spawn it right?

[stable marsh]

I thought so - this being the server RPC right?:
(Ignore the name - like I said, I've tried changing to server, multicast, client, etc on the flag/replicates property)

[plucky prawn]

remember when i said this

you also can not call a multicast event from the client and have it do anything of value

multicast will only execute to all clients from the server

[stable marsh]

correct, what should I set it to (I've done every one of them)

[plucky prawn]

Set Unit Type on your player controller should be a server replicated event

and remove the replication from your CLIENTACTION_SetUnitType

[plucky prawn]

thats not what i said

[stable marsh]

Oh I'm sorry, I don't understand

[plucky prawn]

do this

[stable marsh]

remove replication on this?

[plucky prawn]

thats also not what i said

[stable marsh]

=/

[plucky prawn]

the previous picture you sent me with the red box and the blue box

click on the red box and where it says Replicates in the details change it to "Not Replicated"

[stable marsh]

Okay I've done this:
(Note the name CLIENTACTION_ is just what I named the custom event)

[plucky prawn]

good

now double click on the blue box

do the same thing as the red box except make it "Run on Server"

[stable marsh]

I might be mistaken but only Events (red boxs) can be replicated in BPs... I don't see that option in blue

[plucky prawn]

did you do this

[stable marsh]

yes which enters me into the function graph here:

[plucky prawn]

convert that function to an event

you should also really be sending the Unit int with the RPC

[stable marsh]

did that prior and didn't work but I can change that again

and as for converting it

[plucky prawn]

it doesnt need to be replicated

[stable marsh]

oh that's right

sorry rpc is not replicated

[plucky prawn]

once you convert that function to an event do this

[plucky prawn]

probably this too

[stable marsh]

when you say sending with the rpc... I can only make RPCs on the events in BPs, right? So do I need to have a separate event for every time I have a request like this (e.g. the int?)

[plucky prawn]

not sure what you mean but your RPC is really a special kind of function internally. give it a parameter so you can call it with different data each time

otherwise in your current set up you will need an RPC to set Unit int then another RPC to actually set the class of the unit to spawn

[plucky prawn]

click and drag the Index pin on the Select node and drop it into the black area in the event node

[plucky prawn]

now do this

oops not that one

make it Run on Server

[stable marsh]

makes sense, okay done

[plucky prawn]

sick as ebola

test it out

[stable marsh]

doesn't work

wait one sec

WHY DOES THAT WORK

Thank you!

Does something like get lost in thread execution and that's why it doesn't work?
It's the same order so I don't understand why that info wouldn't propagate

[plucky prawn]

no

you are just calling SetUnitType locally on the client

[stable marsh]

Omg I've misunderstood execution this entire time

I guess I thought since the only way to get to that function was from an event, that it therefore meant it was in the same replication state (if that makes sense)

Didn't realize a function call is independent (i.e. local) - even if it is called by (executed from the event). Thank you so much

[rough dock]

question if i want an actor thats in 2 different places depending if its locally controlled like a weapon in the first person arms of the client but to everyone else its in their third person mesh's hands do i have to turn off replicates in the class defaults? having toruble trying to set this up

[plucky prawn]

yes your FPS arms should not be replicated

basically you would have 2 weapon meshes unless you are doing "true first person camera"

[exotic wasp]

^^

they will likely be entirely different animations and maybe even mesh

[rough dock]

no my fps arms arent replicated

im talking about the weapon bp that gets spawned when the player gets possesed

[plucky prawn]

right. you would have 2 meshes. one replicated which is your "world" mesh and one not replicated but parented to your FPS arms

[rough dock]

yeah i understand that concept im doing that

im having trouble attaching the weapon bp depending if your looking in first person or someone else is looking at you

[plucky prawn]

you would just do both. make sure your FPS arms and FPS weapon are only owner see and your world mesh is owner no see or whatever its called

usually your weapons would define which meshes they use for first person and world meshes

[rough dock]

so i need 2 different meshes or bps?

i was thinking i could use the same one and attach it different places

[plucky prawn]

meshes

[thin stratus]

Heads-up, Attachment of Actors is replicated. If you attach a Weapon Actor on the Server it will override anything locally.

[sour dragon]

And thats great because thats how i managed to use only one Class for local Firstperson / Thirdperson and for Simulated Proxies, so thers just one single class actively in the world that hosts soft references of one single model that is distributed based on if the player is locally controlled, if yes it spawns the model in his firstpersonhands mesh, if not it spawns it on the thirdperson mesh on someone else's game instance

Meanwhile the best paid tutorial that i bought 1 1/2 years ago had to use seperate FP/TP classes per each weapon actor

[thin stratus]

If the Attachment of the Weapon Actor is replicated, how do you attach it differently on different players? The replication part would make it follow one truth. This would only work if you have just one Mesh Component.

There are games where the main mesh component is used for TP and also for the FP body

And pretty sure at that point it's not so great anymore that it replicates 😅

[tardy fossil]

when i was doing seperate weapon models for FP/TP I just spawned both of them and set first person model to "Owner only see" and third person model to "Owner no see"

well technically i replicated a data asset variable that would spawn them client side with an OnRep

[sour dragon]

thats exactly how i did it too, but it switches when thirdperson is activated

[thin stratus]

And?

[sour dragon]

oh actually you are right

[thin stratus]

"Weapon Models" are meshes though?

[sour dragon]

im multicasting the equip

[thin stratus]

I'm talking about Actor Attachment

[sour dragon]

yeah im attaching the models not the actor, you were right

[thin stratus]

Yeah, that's why it works for you then. Replicated Actors would replicate their AttachParent, Component, etc.
So if you have 2 different MeshComponents that you attach the Actor to, then the Server's Replicated AttachInfo would override whatever you try locally.

[thin stratus]

Keep in midn that Multicasting the Equip can lead to problems for HotJoiners and peeps that come back into relevancy that never got the RPC.

Equipment is in theory a State, so that might better as a RepNotify variable.

[sour dragon]

Yeah i will use a repnotify

Im basically currently initializing the equip for the local player and then for the sim. proxies, a lot of is rough and i used casts instead of bpis, but as far as my prototyping went im pretty happy with how good it works

Im just not sure if i really need a actual Actor for my interactable items such as firearms and melee at this point, because i already made a Equipable Component and i used data assets, which hold a ref to the actor class, so i think about completely getting rid of the actor class and just adding it to the main dataasset or creating a child data asset that holds the stuff that i currently store in the actor blueprint. Because i mean in the end im not doing any logic in the blueprint, so its also just a data container at this point. Not sure if i will bite my ass later for that if then suddenly need to do logic in a actor bp.

dataasset :

[tardy fossil]

yeah depending on your use case, you might not need to spawn a whole seperate actor. I use a dedicated mesh component on my pawn just for weapons that gets the model from the data asset in an OnRep function

doesn't work too great if you want weapons to exist without a pawn though.. like if you want people to be able to drop them

[sour dragon]

For dropping i already found a simple solution, on drag operation it gets the current item properties from a struct (such as curr. hp, curr ammo, curr texture etc.) at inventory slot index and creates a seperate actor object that is only alive for 20 minutes in the world, on interaction it gets added as new inventory item with the existing properties from a struct inside my droppable actor.

So theres only a tickable object in the world as long as a dropped item exists, when multiple items are dropped in near vicinity they get added to a array of items and transfor to the first dropped item, so its like a completely new container that holds items this prevents spamming, and its only one single ticking actor that can handle multiple items of the same type

[tardy fossil]

sounds like a good way to do it

[worn wagon]

Has anyone worked with the CommonUser plugin, specifically the CommonSessionSubsystem? Maybe I'm crazy, but the CleanupSessions method sets the bWantToDestroyPendingSession property to true, and then it only gets reverted to false if a session gets destroyed. If no session exists, it stays as true and when the user next wants to start session it's immediately destroyed. I feel like I'm overlooking something and I don't want to go modifying the plugin without a full understanding, but I can't find anything else.

Lyra calls the CleanupSessions method in the main menu which makes sense, if you travel back it should clean the session up. But this softlocks hosting a session for me 😅

I've been making use of the CommonGame plugin, which depends on the CommonUser plugin, so it's hard to just ignore it and roll my own system because its all so interlinked.

[rain slate]

what can prevent my postlogin from working, I have a postlogin method in my gamemode to add the player controllers to an array in my gamestate I put debug in it and it never fires I don't know where this can come from, I use steam sessions in a game instance for my menu with a button to join a created session. Once the session is created I use a server travel to join a lobby map and this is where I get all the player controllers but when I test my array remains empty 😦

[split siren]

PostLogin is quite an important part of joining a server, so if a player connects to the lobby it indicates it actually ran.
Is it possible you are checking your array on a client? All PCs exist only on server and each client get's replicated their own, but not others.

[thin stratus]

@split siren @rain slate ServerTravel for Steam has to be done Seamless (Boolean on the GameModes). And Seamless traveling doesn't call PostLogin as the Clients are expected to already have logged in.

[split siren]

Didn't know that, thanks for the info.

[thin stratus]

You need a different event, there some like PlayerInitialization or whatever it is called that gets called from PostLogin and PostSeamlessTravel. Not sure what is available in Blueprints.

[rain slate]

Thanks for your help i'm not using Blueprint for this part, I'm doing it mostly in c++

[thin stratus]

GenericPlayerInit or something like that should be the event that calls for both

[brazen anvil]

If a data asset is replicated from server to client, is it possible for this to be modified/cheated in any way?

[thin stratus]

I never had to put a PlayerController array anywhere though

They don't replicate to clients anyway and the PlayerArray is already a thing for PlayerStates which do replicate to everyone

[thin stratus]

Clients can modify everything locally. Server and other clients still have their own version, so it wouldn't matter

You just shouldn't send anything to the server:P

[brazen anvil]

Yeah thank you

[rain slate]

I want that Array to create a ready system, so everytime a player change their ready status the gamestate is checking all player controller and their ready boolean in their gamestate

[thin stratus]

Yeah I still just use PlayerStates and PlayerArray for that

Ready Boolean being in the PlayerState

Can always be marked as owner only when replicating

Yeah can of course make that all PlayerController depending. Just sharing another more build in way

[rain slate]

To get your PlayerArray do you have to fill it manually or is it store somewhere automatically ?

[thin stratus]

PlayerArray is already a thing on the GameState. It's not replicated but gets filled by GameState and PlayerStates automatically. Order might be out of sync but that's about it.

In my UI I just grab the PlayerState, send an RPC that I toggled the Ready Button (+- some prediction) and in the RPC I flip the Boolean on the PlayerState, grab the GameState, check if everyone is ready (which sounds pretty State related :P) and then tell whatever needs to that we start doing whatever should happen. E.g. The GameMode to start the game.

[rain slate]

Oh thank you ! I will give it a try

[sturdy sand]

why is the built in net cull distance relevancy so slow? It takes a long time for the unrelevant actors to get destroyed.

[thin stratus]

There is a config variable to lower the time but there are hard coded values with some randomized parts to not evaluate every frame, especially when the actor could flip flop between relevant and not.

[sturdy sand]

Gotcha. Is the variable called net update frequency or is it in the project settings?

I was thinking it was net update frequency but it doesn't really work

it's fine though I don't need it anymore since I understand why it's delayed

[vague spruce]

anyone know how to attach the debugger to a server that's running on a separate process? i'm attaching to the process directly but it looks like no breakpoints are going to be hit

[thin stratus]

It's not, no

It's only settable via config for the whole project

I don't know the name without looking it up

[sturdy sand]

I assumed. No worries. If I'll need it I'll find it

[thin stratus]

Usually just selecting the process

[vague spruce]

doesn't work but it's ok, i just switched back to running under one process for debugging

[thin stratus]

Oh you mean in the editor?

[vague spruce]

yep!

[thin stratus]

Sounded more like you wanted to debug via VS/Rider

Yeah no clue then

[vague spruce]

yeah so i'm using rider to debug in the editor. i can open a separate server process in the editor, but i can't attach to it and debug breakpoints

i confirmed that i'm selected the right process

[thin stratus]

Never done that. I usually start the extra server standalone if I need that

Then it should work to attach

But no blueprint breakpoints of course

[vague spruce]

anyone know how to disable the camera for spectators? i'm starting players as spectators but i don't want them to be able to see the world before i've had them possess their pawn

[thin stratus]

Usually by manually plugging a loading screen in.

[vague spruce]

damn i was really hoping to avoid having to create a UI element for this... but it looks like i have no choice

for some reason there's a default camera that UE will always present

[thin stratus]

Pretty sure you can also handle that via PostProcess fwiw

If you don't want actual UI

[vague spruce]

i have no pawn possessed and i have my own custom spectator pawn

oh not a bad idea

[thin stratus]

Well, that's cause UE doesn't use "Camera" for its rendering

The CameraComponent you plug onto Actors is just an Offset + Settings.

The "ViewTarget" is the thing that counts as a "Camera".

And that gets set to the Pawn when possessing

[vague spruce]

ah but if i set the view target to nullptr it still renders

[thin stratus]

And otherwise sits on the Controller.

Yeah pretty sure you can't do that :D

[vague spruce]

okay cool i like the idea of using a post process effect

[thin stratus]

If you want a more low-level change you can try and see if there is anything in the PlayerCameraManager, or GameViewport(Client)

That you can alter to default to "black" or so

But honestly. That's a pretty shitty user experience :D

I would give them either a LoadingScreen or alter the Camera Transform via the PlayerCameraManager to show some level overview or so until possessed.

In prototypes I usually have some rotating Actor in the Scene that just shows a birds eye view of the map while they aren't possessed yet.

[vague spruce]

i really like the idea of a post process effect

[thin stratus]

Yeah you can try that

[vague spruce]

i just have no assets so the loading screen would literally be black lol

[thin stratus]

Can use a MaterialParamCollection or so to Set some Float from 0 to 1.

[thin stratus]

I mean the post process is also gonna be very limited

Without textures and what not

[vague spruce]

where is the loading screen usually controlled? the game instance?

[thin stratus]

Depends a lot

The general idea of covering the Loading of a Map is done via some generic PreLoadMap and PostLoadMap callbacks that exist in the GameInstance but could be istting everywhere.

That can be used to create a Slate-based LoadingScreen via the MoviePlayer module.

The MoviePlayer module, however, literally blocks all threads and ticks the GameThread manually. So that can be a problem. It will also auto hide once the level is loaded.

For everything before and after that, you are kinda on your own

Before the Level Load you can probably do it wherever your logic starts to start traveling.

[vague spruce]

that's ok i'll forego using the movieplayer module. i can just add a UI element to the viewport on map preload, no?

[thin stratus]

For after the Level Load I would start with maybe BeginPlay of the PlayerController (although that can not call due to SeamlessTravel) or any other early call.
Maybe PostSeamlessTravel or so if that exists

[thin stratus]

Probably not.

HardTravels will probably nuke the UMG Widget

You can try though I guess.

[vague spruce]

surely there's ways to do it though? not looking to make a production grade loading screen but i've seen interesting transitions in some modern games on UE5

[haughty ingot]

I think it works, it’s definitely not ideal because it will be blocked during any actual game thread work. But I’ve seen people do it

[haughty ingot]

Honestly just go into Lyra and grab the CommonLoadingScreen plugin

[brazen anvil]

I am equipping a weapon and then based on the weapon I am changing my character pose. I am using a GAS ability for weapon switching and my character pose is a replicated variable. Should this only be set by the server? Or can I set it as the client and server and then it will be sync'd when it replicates down? Trying to figure out how client prediction on this would work.

Or if I should just not worry about it. I would just hate for someone whos on like ~200 ping push a button to switch and it just lag. But maybe thats just the price of high ping.

[haughty ingot]

Client prediction at its core is the client doing something predictively in the assumption that the server is going to agree with the clients change. Rollback is the implementation of what happens when there’s a disagreement. It all depends on how your game is structured and what your end goal is in terms of authority.

Really simply the current weapon you’re holding could be a RepNotified variable, the client will predictively set that variable on themselves, and run any logic they need to do locally such as input. Then RPC to the server that they’ve swapped weapons, and the server will set the RepNotified variable, and everyone will get the change statefully, and update anything required such as a linked animation layer, visuals, etc. You could set the RepNotified variable to SkipOwner, or only SimulatedProxies. Or you could leave it and just confirm that there is no delta between the server and the local client. But it really depends on what your needs are.

[queen escarp]

hi

im getting access none from the "player hud WB"

it works but giving access none errors :/ ?

[haughty ingot]

Before your cast, check to make sure the controller is locally controlled.

[queen escarp]

oh

[brazen anvil]

Ok yeah that was how I was going to do it. Does doing it this way leave it open for any sort of cheating? I guess where would I be able to check if the server version is the same or different than whatever the client set it to? Because wouldn't the OnRep already be updated to whatever the server changed it to?

[queen escarp]

hmm still same error tho

[haughty ingot]

Send a picture

[haughty ingot]

Yes, as long as you didn’t have a replication condition to skip the local player

[sinful tree]

That means you're trying to access Player HUD BP before you have a value set in it.

[queen escarp]

hmm

[sinful tree]

So your begin play of this may be firing before you have created your widget blueprint.

[haughty ingot]

Just remember UI related classes only exist locally, Beginplay fires on relatively everyone, so they’d be accessing something that didn’t exist for them

And a race condition problem like Datura is saying

[queen escarp]

well

its the controller that holds the widgets

and when controller is valid then im setting it and getting the hud

[sinful tree]

Ideally, you wouldn't have game logic updating your widgets. You can work the other way around - have your widgets listen for events.

[haughty ingot]

Yeah, and BeginPlay fires for the server too

[queen escarp]

since i got the controller the hud is created

[haughty ingot]

That’s a losing battle trying to explain that one I’ve found

[queen escarp]

well game locing is creating a widget really im not sure if thats in the same are as "updating the widgets" but i guess so

[haughty ingot]

He means you shouldn’t really ever need a direct reference to a widget from game code

But this is getting more into the realm of regular UI workflows then Multiplayer

[queen escarp]

ah okeyu

[haughty ingot]

Just remember this simple trick:
UI -> Game Code
GameCode -> UI:

[queen escarp]

hmm

hm okey but in this case i dont understand the error

https://i.gyazo.com/b7547ca6438a928c2d4864e53957845a.png

[haughty ingot]

Well this still doesn’t care if it’s locally controlled, and your server probably doesn’t have a valid object for PlayerHud, and you probably have some race condition since you’re calling a client RPC to set the widget. I don’t know your whole workflow, but that’s probably where your two errors are coming from

[queen escarp]

aye this is something weird

[haughty ingot]

Not really, just a bit of a misunderstanding is all. Server doesn’t have a valid object for your clients widget, and it won’t

[queen escarp]

but widgets reff cant be replicated right :/ ?

[haughty ingot]

No

[sinful tree]

No it isn't. You have a variable that you're trying to use before it's actually set with a value and then you're setting that value (which is null) into another variable (leaving it null)

Begin Play doesn't happen on everything everywhere all at once.

You have a begin play somewhere that is creating a widget. That creation is happening after the Begin Play where you're setting the widget reference here.

The fix is to not store a secondary reference to the widget in another place like this. Let the widget retrieve the values, and create event dispatchers that the widget can then bind to and listen and do what it needs to when you want it to - then the widget can just handle itself without your game code telling the widget to do things.

[queen escarp]

aye im creating the widget in the player controller first (as i understnad it player controller is first in the flow)

then from the player controller im setting the "player characters (Player_Hud reff)"

[sinful tree]

^ is that screenshot also on begin play?

[queen escarp]

no

after the in the line of the event begin play from the player controller

https://blueprintue.com/blueprint/67q1b-el/

its however an event thats run on "owning client"

[sinful tree]

Which is triggered on what event?

[queen escarp]

player controller begin play

after the creation of the player uhd

[sinful tree]

So you're calling a client RPC on begin play of the player controller?

[queen escarp]

yeah

but its not a Rpc

just on owning client

[sinful tree]

You're marking it as "Run on Client' makes it an RPC.

[queen escarp]

oh ok

[sinful tree]

And if you're calling that Begin Play, then you're still making it do this on begin play before the spawned actor likely exists.

[queen escarp]

well i mean im spawning the actor right before on the server

i have a 1 sec delay, it might be to short ?

[sinful tree]

You can't guarantee when the RPC will be done by the server.

[thin stratus]

Don't use Delays ...

If you want to know when the SpawnedActor is valid, make it an OnRep

And execute depending code in the OnRep function of it.

[thin stratus]

Buddy

Delay/Timer/Whatever artificial time between A and B you can come up with

All of that is shite

Use RepNotify

[prisma snow]

very important, I had to rewrite parts of our mp code because it used delays and it was a pain, and it gets worse down the line even if it works initially

[queen escarp]

im having a hard time understanding how to use repNotifie´s correctly ./

[thin stratus]

Any kind of FPS or Network Lag, or the Engine deciding for it to take longer due to Priority of other Actors can break delays

[thin stratus]

You use them whenever you need to be notified when a Property Replicated to a Client.

And when its a property defining "State"

That's kinda all there is to it

Want to change the Color of a Light on everyone? -> RepNotify
Want to show that a Player is a Ready in the UI? -> RepNotify
Want to set a StaticMesh of a StaticMeshComponent on everyone? -> RepNotify
Want to know when a given property is valid on the Client? -> RepNotify

Want to play a one-time event that plays some sound? -> RPC
Want to tell a Client to do XYZ in that moment? -> RPC

[queen escarp]

hm imma save these lines tbjh

[thin stratus]

Everything that needs to replicate that alters any kind of State of something should be a RepNotify.

Cause an RPC would not call again for people that join late or come back into relevancy range.

Which means your Light's color wouldn't change for them anymore.

The RepNotify would however call properly and thus apply the change to the Light. etc.

You are here for quite a while, and you read the Compendium I assume. You really need to start getting the basics into your head before making bigger Multiplayer Systems.

If you have any kind of delay/timer/wait time in your Project to overcome the time it takes for something to replicate or become valid, you should fix that.

There are only a handful BP only cases where it's somewhat "okay" to use a FrameDelay (not a timed one, just 1 frame at a time) to check if something is valid.
And that's usually if the property is coming from C++ and you have no way to get an OnRep going for that.

[queen escarp]

yeah well, i kinda always solve my issues without repnotifies so far but yeah you are right,

hm imma mess about some more and se if i can solve it

omggggggg

ok this is so stupid

ok so everything worked as i wanted it to all along, however i had added more player characters on the test map just for visual rep... and im tracing for player characters if hit create widget stuff but they were controlled by nothing ... so thats where the error came from

-.-''''

[thin stratus]

You still need to resolve the usage of your delays/timers/etc.

[queen escarp]

yeah i get what ur saying

[proven pagoda]

I have 1 delay timer in my game and I'm sure there's a way to solve it but I'm not sure how. If my player dies and respawns, the BeginPlay has a LocallyControlled check and all clients return false even if Player 0. I put a 1 second delay, but I'm not sure what property I'm waiting for it to change to be recognized as locally controlled

[thin stratus]

BeginPlay of the Character?

[proven pagoda]

Yeah inside my character BP

[thin stratus]

Yeah that's cause the BeginPlay most likely calls before the Client knows that the Character is possessed.

What are you using that for?

[proven pagoda]

Loading the game

Just load data I have my savegame in blueprints in this project

[thin stratus]

The BeginPlay of your Character is used to load the game?

[proven pagoda]

Why is that surprising

[thin stratus]

Well for one we are in #multiplayer so loading the Game is usually done by the Server, which means IsLocallyController wouldn't even matter.
And then Loading the Game is also usually done outside such classes, cause the loaded game would spawn said Character.

It feels/sounds a bit inverted

Unless this is just a small portion of your load system and it's specifically to initially something locally saved for said character

[proven pagoda]

I have little bits of data saved on each actor I need saved, and the timing of save and load is different on each one really

And I can't call save to disk on the server

I don't have dedicated yet I save to disk

[thin stratus]

So each Player saves their stuff locally?

[proven pagoda]

Yes

[thin stratus]

Are you sending the Data to the Server after loading?

[proven pagoda]

Well yes the actual setting the values is sent to authority then replicated back to clients

[thin stratus]

Well, either way, if you need an Entry Point in the Character for when to know if Locally Controlled or not, override the "ControllerChanged" function (not 100% sure it's called like that anymore). It gives you the new and old Controller.
It calls on Server and owning Client.

[proven pagoda]

I've never heard of that override but I'll look for it thanks

[hushed sierra]

I have a World UI that I use the mouse to click on. Both the client and server see the UI, but only the server version responds to any sort of input (clicks/hovers etc). The client doesn't respond to any sort of interaction at all. Does world space UI not work the same way in multiplayer? I've checked that the Player Controller has enabled mouseover & click events, and the UI has Receive Hardware Input enabled.

[vague spruce]

i've been looking into the lyra plugins and they look good (all the common ones)

[sinful tree]

All UI is local only. Changes you make to it would only happen locally unless you replicate data about it to the server, and in order to send data to the server about what a client did requires you to route the RPCs to the server through an actor that is owned by the client.

[vagrant hamlet]

I'm trying to set an actor cull distance, but it's not working. I've set NetCullDistanceSquared to 100, bAlwaysRelevant to false, bNetUseOwnerRelevancy to false, and the actors are being spawned on the server. They are still visible at a very far distance

What else should I try?

[hushed sierra]

They each have their own local version of this widget. Shouldn't a client be able to press their own local button to trigger something locally?

[thin stratus]

Might just be a problem with the WidgetComponent then

[quiet yarrow]

im using async physics.

Heres my current network profiler results while moving ~100 physics items by a client or server.

I've compressed the position/rotation/velocity to halves and my send rate down to 5, but its not enough for real world scenarios

ill look into using that method. Looks like its entirely on the server which is impressive. I wonder how that scales tho

[daring gorge]

damn you actually have a lotta stuff, i only have vehicles and at max in single digits, however 4.26 works weird, atleast when i use skeletal mesh vs static mesh with physics, ive never profiled before and i plan to test in real world scenario by packaging, but i also think just general engine version varying makes differences, especially using 5

[daring gorge]

all the best, lmk how it goes!

[woven bramble]

How can I ensure that physics replicate identically on both the server and the client?
In the game, I have a ball with physics (the ball is replicated, and 'simulate physics' is enabled), but when I interact with it, the ball moves to a different location on the server and accelerates differently on the client.

[quiet yarrow]

ownership is good trick

[quiet yarrow]

set ownership to the client for the ball when they interact with the ball. The physics will behave as you would expect. Just make sure when you set ownership that is being replicated and synced with the server and other clients

[thin stratus]

Not using physics is probably the better idea. You can get away with a lot by using the Projectile Component instead

It has some smoothing build in for sim proxies

[quiet yarrow]

nah physics are a great way to spice up your game. I think more games could benifit from using a small dose of it. If you can deal with ownership its really not that bad

[woven bramble]

'Set owner' didn't seem to work. If I understand correctly, what you mean is that when the character touches the ball, run the set owner function and make the character that touches the ball the new owner. Is it right?

[quiet yarrow]

yeah

[woven bramble]

oh, this is the first time I've heard of this method. I'll try this if the set owner doesn't work.

[quiet yarrow]

are you setting owner on server?

[woven bramble]

First I tried SetOwner by doing RunOnServer, then multicast. it didn't work in both methods. I made sure that the 'new owner' is the client (so who touchs the ball)

[quiet yarrow]

are you using smooth sync?

[woven bramble]

No

Did you advise me to add a collision inside the character and make a Set Owner through the ball that touches it?

[quiet yarrow]

however you want to approuch it

not sure how you are interacting with it

as long as the ball gets the client that is interacting with it

[woven bramble]

'RunOnServer'
it not worked

[quiet yarrow]

is that inside your controller or pawn?

[woven bramble]

controlled character pawn

[quiet yarrow]

plug in the cast to the target for set owner

right now your code is targeting yourself and setting yourself as owner to yourself lol

[woven bramble]

lol

I don't quite understand. Should I do this in the character or in the ball BP?

oh

sorry, i see

[quiet yarrow]

you can do it in the controller

[woven bramble]

I see now

[quiet yarrow]

just plug in the cast

ye

[woven bramble]

is it correct, not worked (it's inside the character blueprint)

[quiet yarrow]

is your basketball generating overlap events?

[woven bramble]

yes

[quiet yarrow]

weird

did you try multicasting or rep notify?

[woven bramble]

I tried Multicasting too
and just runonserver

Do you recommend I try RepNotify too

[quiet yarrow]

you sure all the data is getting there?

[woven bramble]

I did debug print string reflects

The ball is moving, but there's a difference in location, like I said. Physics is different in both universes.

weird

[quiet yarrow]

so the physics feel reactive now?

[woven bramble]

Physics was always working anyway. but the problem is still the same, the locations are different.

[subtle kernel]

Guys, can somebody explain how to programmatically rotate character with CMC? So the rotation would be replicated on all proxies. 🙏

[quiet yarrow]

do you not have rep movement?

[woven bramble]

I have Rep Movement

[quiet yarrow]

ohhh

I forgot

is this an actor?

it needs to be a staticmeshactor

[woven bramble]

It was an actor who had Skeletalmesh, yes. I'm creating a new actor, add a static mesh and try it now, thanks

[woven bramble]

The ball throws me, or like a wall even if it moves. It's like I'm hitting a 100-pound ball. That's my collision settings:

[quiet yarrow]

whats the mass?

[woven bramble]

I'm used to doing it from within the skeletal mesh. Sorry, I'm changing it immediately in actor settings and try it

[woven bramble]

I tried it at different weights. At a weight of 0.1, yes, it flies when I touch it, but when it stops, it shows a vibrating behavior in the Client. I mean, it stands still but it vibrates. And when I hit it, it throws me.

[quiet yarrow]

seems like its replicating. Sounds like you need to do more testing to get the physics to behave how you want. By default the physics are should be fine. Just try not to have too low or too high mass if you want realistic physics

make sure the character touching it is the owner at the time of pushing it

[rough dock]

so the only way i could fix this is unticking replicates on the parent weapon bp?

[woven bramble]

As you said with static mesh, the problem was solved. But I left it because there were some collision problems that I could not solve. In the actor with skeletal mesh, I set RepNotify to Owner Only, increased the Net Relevance settings a little bit and installed Smooth Sync.
It works flawlessly now. Thanks for your help.

[haughty ingot]

If you know C++ OnRep_AttachmentReplication is virtual.

[rough dock]

i know a little bit of it and i have vs studio do you think it would be easy to fix for someone with a small amount of c++ knowledge?

its working on the client so i know the code is good

[haughty ingot]

It’s not really a fix thing. It can just give you more control over what goes where for different connections. If you don’t have a solid grasp of C++ it probably won’t be as much use

[rough dock]

well i really wanna make this change so ill give it a try, do you think you could point me in the right direction?

[haughty ingot]

Yeah, just attachment is replicated using an OnRep (that way it’s stateful). So just override the virtual function and decide to do different things for the owner/local player

[rough dock]

thanks ill give it a shot

also this means im gonna have to reparent my master bp class right?

[thin stratus]

Yeah so basically what Dr. Elliot said. You'd need to override that function in C++

And yes you'd need to reparent the weapon BP to that new C++ class

[primal summit]

anyone know how to have an in-game invite/team system? I am working on a MMO style survival game and wanted to have a popup show on another player's screen when you click invite, then add them to the team. I am having difficulties on replicating this logic properly

[thin stratus]

After they are already connected to the server?

[jade scroll]

this is a engine bug

for 4 players. in another project with same code- server print 4x and clients 12x

on other porject with same code sometimes i print 7x client sometimes 9x client sometimes 6x client etc etc

this is a eninge bug i cant find the issue

[thin stratus]

You might want to show what you are actually printing there and when that is being called.

[jade scroll]

its event begin play in character

event begin paly character another project with same code has no issue

[thin stratus]

Show the whole code path of that please.

[jade scroll]

bro event begin play in character

[thin stratus]

BeginPlay will call once per replicated Character.

[jade scroll]

correct is : 4x server 12 x client

in this project sometime 7x cleint soemitmes 5x cleint sometimes 8x client etetc

i cant find the issue

[thin stratus]

With a ListenServer I assume?

[jade scroll]

i serching a week wtf

listen server yes

anotehr project its work with same code

[thin stratus]

Are all those Characters in relevancy range when they spawn?

[jade scroll]

its a eninge bug 100% sure

[thin stratus]

If you are sure about that, report it to Epic via their Form with proper repro steps etc.

[jade scroll]

relevancy range?

they spawn from controller

serverside

every start he print another count of clients

[thin stratus]

Yeah, the Range between a Client's ViewTarget and the given Actor that controls if the Actor is relevant to the Client or not.
Not being Relevant (too far away) would cause the Character to not be replicate to said Client.

You can try printing on Tick too, to see if it's different amounts there too.

If it prints the same amounts on Tick as on BeginPlay for a given test, then the Characters aren't being replicated to those clients.

[jade scroll]

i dont know waht range? mean?

[thin stratus]

Range means Distance

[jade scroll]

yeah=

why should they not in distance?

[thin stratus]

Idk, maybe your other project has a big Map and it spawns the Characters far away from each other.

[jade scroll]

its small map and small project

[thin stratus]

You aren't really providing any info on what the setup here is. So I can only do some guess work

Check via Tick if you see the same amount of Prints per Player.

[jade scroll]

it is i already checked

[thin stratus]

Then the Characters did in fact not spawn at all for the given Client.

[jade scroll]

if event begin paly print 6x cleitn it will be 6x

[thin stratus]

So it's not a problem with BeginPlay, it's a problem with your Characters not replicating to the Clients.

How are you spawning them again?

[jade scroll]

they spawn at beign play thats all?

[thin stratus]

BeginPlay of the PlayerController?

[jade scroll]

yes

[thin stratus]

Are you limiting that to Authority?

[jade scroll]

he spawn the character

yes on serverside event with switch has authority

[thin stratus]

Can you please share that code.

[jade scroll]

when i start with gameplay made its works fine

when i start from lobby then the problem comes

[thin stratus]

Ah

[jade scroll]

what can lobby do with my spawn coe from palyer?

[thin stratus]

Do you use the same class for your PlayerController for Lobby and Gameplay Map?

[jade scroll]

i dont udenrstadn this

1x lobby controlelr and 1x game controller

[thin stratus]

Same or different class?

[jade scroll]

both are player controllers

[thin stratus]

I know that UE does not call BeginPlay on PlayerControllers if their Class is the exact same after a SeamlessTravel

That could have an effect

[jade scroll]

i dont use seamless travel

[thin stratus]

Well, you should, but that's a different topic then

Is this in the Editor or Standalone/Packaged with Steam?

[jade scroll]

on other project same code it works?

[thin stratus]

The code itself is not the problem then. It just means that the Project's have different code that affect this.

[jade scroll]

waht do you mean different class? they are both player controlles? xD

[thin stratus]

You can make Blueprints of APlayerController

If you make 2 different ones, they are 2 different classes

If you make Child Blueprints of your Blueprints they are also different Classes

[jade scroll]

yeah i have 1 lobby controlelr ad 1x game controller?

[thin stratus]

And they are two different Blueprints?

[jade scroll]

yes.

[thin stratus]

If you aren't using SeamlessTravel then that's maybe not it anyway.
Do you test this in Editor or Standalone/Packaged?

[jade scroll]

i already test all

im sure100% its engine bug. or someone hacked me

idk waht can i do now -.-

[thin stratus]

Welp, then good luck with the Engine bug. Report it to Epic.
No one here can help you with Engine bugs.

[lament flax]

stop locking yourself in those assumptions

[jade scroll]

maybe save game is the problem?

[thin stratus]

Idk, maybe the lightbulb in your leaving room is

That's as random of an assumption as yours

Try to reproduce it in a new project, that has no changes at all, and only spawns the Characters.

[jade scroll]

what can cause the problem?

i satrt from gamemap its working

[thin stratus]

Idk, I was trying to figure that out but you always fall back to "It's an engine bug"

[jade scroll]

i sttr from lobby its not working

[thin stratus]

If it's an Engine bug, why are you here?

[jade scroll]

what can do lobby for my spawn code in palyer controlelr?

[thin stratus]

A lot of stuff. If you aren't using SeamlessTravel, players would be actively reconnecting after travel.

Do you even see the other characters in the level?

[jade scroll]

yes

its all working fine

everything

its just someitmes he print 7x then 8x then 9x etcetc

the exact is 4x server 12x client

the player statr the game tsart the player spawn my character

what can lobby controlelr do if the code start?

[lament flax]

can you be sure you count correcly

and you didnt miss any

[jade scroll]

yes

[lament flax]

show logs to us

with different counts

[jade scroll]

i can start agai and it will print another

this time it was 6x

[thin stratus]

Hm, why is that printing Client 0

Shouldn't that print 0, 1 and 2?

Given you start with 4 players.

[jade scroll]

this time it was 8x

[thin stratus]

Epic's localization team for Lighting must be rebuilt should also revisit their translations..

[lost inlet]

I'm surprised it even has German localisation

[jade scroll]

weaht has lighting to do with my spawn? xD

[thin stratus]

Nothing, I just saw the message and got annoyed

The prints are strange

[jade scroll]

when i satrt from gameplay map it works allways correct

allways 4x server adn 12x client

but when i statr from lobby its printing everytime another

[thin stratus]

What I don't get is why it's saying Client 0. Shouldn't it say "Client 0" 4 times, "Client 1" 4 Times and "Client 2" 4 Times?

Maybe that's misleading, not sure

[jade scroll]

i spawn the character from my controller in run on server event

[thin stratus]

You shouldn't use an RPC

BeginPlay of the PlayerController with a SwitchHasAuthority is enough

That's why I asked you to share a screenshot of the code.

...

[jade scroll]

i cant

can the prolbme come from game instance?

but waht has game instance to do with my character?

[pseudo wagon]

Create a counter in your BP, in begin play increase it and print out the value. Check if it is greater than 1.

[jade scroll]

counter? and then?

its all working fine when i satr the game but when i start from lobby it wodn work anymore 😄

waht can lobby do? why should they not spawn correctly 😄

[thin stratus]

Why?

Also I already said get rid of the RPC setup for spawning. It's wrong.

If you don't share info we can't help. Repeating that it's working without the Lobby isn't going to change that.

Either provide the info we ask for and perform the test we ask for or leave it.

It's exhausting to repeat our attempts at helping you the whole time.

[jade scroll]

i have shredd my full game until jsut a few events

i could solve the problem when i delete all " set memebrs" node and all "break" nodes from strucuters

and it worked.

so i know its aengine bug#

but wah cna i do???

how can i work on my project -.-

[cloud crown]

ok so montages which is supposed to be played across the server it only plays on owning client and server
i tried multicasting resulting in playback at the owning client
what to do

UE5 CMC custom movement mode playing montage

[soft relic]

Multicasts must be called from a server to work properly

If you want to skip that multicast playing on the owning client, add a Is Locally Controlled branch before playing the montage

[cloud crown]

yes its called it actually works main problem is the playback on the client happens twice

[cloud crown]

ook

[soft relic]

So client locally calls PlayAnimMontage and also calls Server, server multicasts and multicast only plays if NOT locally controlled

[cloud crown]

lemme see

[cloud crown]

void UNewCharacterMovementComponent::Multicast_PlayVault_Implementation()
{
    if (!CharacterOwner->IsLocallyControlled())
    {
        PlayVaultMontage();
#if WITH_EDITOR
        if (GEngine) GEngine->AddOnScreenDebugMessage(-1, 5.0f, FColor::Yellow, FString::Printf(TEXT("HMulticasting")));
#endif

    }
}```

like that right

[worn wagon]

🙃

[soft relic]

Yeah, but I would make a generic play anim montage function I suppose, otherwise you'll need a unique function for every different anim montage you want to play

[cloud crown]

not working still though

😭

{
    if (UpdateVaultWarpLocations())
    {
        PreInitializeVault();
        if (VaultData)OnVaultInitialize.Broadcast(VaultData);
        if(CharacterOwner->HasAuthority()) Server_PlayVault();
        else PlayVaultMontage();
        SetMovementMode(MOVE_Custom, CMOVE_Vault);
        OnVaultStart.Broadcast();
    }
}

void UNewCharacterMovementComponent::PlayVaultMontage()
{
    if (CharacterOwner && CharacterOwner->GetMesh())
    {
        UAnimInstance* OwnerAnimInstance = CharacterOwner->GetMesh()->GetAnimInstance();
        if (OwnerAnimInstance)
        {
            if (!VaultData)
            {
                PostInitializeVault();
                return;
            }

            UAnimMontage* VaultMontage = VaultData->AdvancedMovementMontage;
            if (!VaultMontage)
            {
                PostInitializeVault();
                return;
            }
            float VaultPlayRate = VaultData->MontagePlayRate;
            float VaultStartPosition = VaultData->MontageStartDuration;
            OwnerAnimInstance->Montage_Play(VaultMontage, VaultPlayRate, EMontagePlayReturnType::MontageLength, VaultStartPosition);

            // Bind to the montage blend out delegate
            FOnMontageBlendingOutStarted MontageBlendingOutDelegate;
            MontageBlendingOutDelegate.BindUObject(this, &UNewCharacterMovementComponent::OnVaultMontageEnded);
            OwnerAnimInstance->Montage_SetBlendingOutDelegate(MontageBlendingOutDelegate, VaultMontage);
        }
    }
}

thats all the implementation i have done

[frail barn]

in multiplayer set actor rotation works not every time
it can set rotation for one component, and forget another, like mesh or 2d sprite
delay not fix it
standalone mode does not have this issue
i search through web and dont find the answer
any ideas?

[wet nymph]

Hi, I'm confused by the Unreliable RPC, shouldn't it be dropped if I had a packet loss? Why is being resent?

[haughty ingot]

He's always like that, argues with absolutely everyone who tries to help him.

"How do you do X?"

"You do Y"

"no u don't"

"ok".

[lament flax]

are you setting the rotation on client or server?

and on what type of actor

[frail barn]

server
character

[lament flax]

how are you sure its server ?

is it inside a RPC ?

and are you sure the node gets executed

since the camera of the client is controled by player input, its possible that the client moves its mouse, forcing the camera to move, so the server rotation is "overidden"

to test this, make sure you dont move your camera at all when the node gets called

[frail barn]

this video show it's runs as a client
set actor rotation is inside a server rpc
u can see mesh component and a 2d paper sprite component at minimap is forgotten sometimes
projectile spawn point component is rotated correctly everytime

[lament flax]

if its a server RPC its called on server not client

[frail barn]

yes

[primal summit]

Yes

I'm trying to build a group system while connected to the server

[rustic sable]

how can I get HTTP calls to work on my server when it's not localhost?
For example when FHttpServerModule runs in my packaged server I can call
curl -v -X GET localhost:8080/get
from cmd and it works but when I try the call from the client to the actual server IP, for local it becomes something like http://192.168.1.44 locally or the remote host then the connection is refused

    TSharedRef<IHttpRequest, ESPMode::ThreadSafe> HttpRequest = FHttpModule::Get().CreateRequest();
    HttpRequest->OnProcessRequestComplete().BindUObject(this, &MyClass::OnServerInfoResponse);
    HttpRequest->SetURL(url);
    HttpRequest->SetVerb("GET");
    HttpRequest->ProcessRequest();

I can connect to these IPs (local or remote) when joining a match and see them in my lobby but can't get the http calls to work
the request url looks like this
FString url = FString::Printf(TEXT("http://%s:%d/get"), *server.Address, 8080);

[crisp shard]

is doing a "freeze" effect on another player feasible with only blueprints? i ask due to usually nything with movement isn't usually that great but considering making a frozen state and im not sure if completely stopping the players movement inputs / disabling movement would essentially be enough

[verbal ice]

Stop Movement Immediately -> Set Movement Mode to MOVE_None -> Disable Input on the PC

[crisp shard]

incredible, thanks, will update

[sinful tree]

You need to ensure you have ports opened through any firewalls that may be active, and if on a different network or behind a different router, ensure that port forwarding is set up to ensure that any communications to the IP address and port is forwarded to the desired computer's local IP Address.

[quiet yarrow]

Hey im brand new to using the networking profiler. Any tips or notes of things I should be on the lookout for when trying to find bottlenecks/excessive rpc calls? im trying to make sense of it all atm so any help would be appreciated 🙏

[rustic sable]

Yes, I temporarily disabled the windows firewall locally and set up port forwarding with no luck.

[worthy oak]

Is the client/server in the same network

[rustic sable]

When running the server locally yes when trying it on a remote host no

[worthy oak]

Your using the public ip address of the server then?

And ensuring the router is forwarding traffic to your local ip and desired port?

[rustic sable]

Yes

[rustic sable]

I thought I was on the local testing but something hasn’t quite picked up yet. As far as when I deploy remotely I’m not sure what to set up. The remote firewall is disabled for now so and I’m using docker so not sure if I can forward through the docker compile

[worthy oak]

where is “deploying remotely”

Ah

[rustic sable]

On a different server

[worthy oak]

If your using docker did you expose/map the internal port to external?

[rustic sable]

Not yet, pretty new with docker

[worthy oak]

That’s probably it

Docker has its own internal network which by default is gonna block everything

You have to specify which ports should forward

Either by exposing them or mapping them when you run the container

[rustic sable]

Ah ok

[worthy oak]

For docker compose if memory serves me right it should just be “Expose 80”

Or whatever your port is

[rustic sable]

Ok, do I have to forward the public IP traffic to anything or should that be enough?

[worthy oak]

On your router level yes you would need to forward your public ip and port to the private ip and port (whatever you exposed on docker)

[rustic sable]

Router level… hmm not sure how that translates when it’s just a vm

[worthy oak]

If it’s a hosting service that would be a security group

Or the settings for that specific VM

[rustic sable]

Ah ok, I’ll dig for that then,

[worthy oak]

the VM also needs a public IP assigned which should be default most of the time

Is this AWS? Oracle? Something else?

[rustic sable]

Yes that it is, I can connect to matches over 7777 like I said just not http calls

[worthy oak]

Got it ok perfect definitely have a public IP then

[rustic sable]

Just digital ocean with nakama running on 1 instance for server registration

[worthy oak]

gotcha ok

I haven’t used digital ocean in a minute but it would be on your droplet settings

And under security

Either security group, forwarding rules something like that

[rustic sable]

Ok cool, should be easy to find then

Basically before I join a match I wanted to get some info from each server, ping, name etc

[sinful tree]

(which you should be able to do VIA sessions)

[vapid gazelle]

1. How feasible is it for someone to implement a basic, non-fancy, coop-oriented (not esports-grade) client-side prediction system for abilities, assuming one is not using GAS?

I realized that right now every ability my character is using are first run by the server for confirmation, therefore introducing a delay before the client executes those abilities. Ideally the client triggers them right away, and rolls back if the server doesn't agree. I'm guessing this is somewhat tricky to implement from scratch and most just stick to GAS?

2. I'm also exploring trusting the client in their actions because this is a super friendly cozy non-esports coop title and there's zero need to police clients, as long as the game doesn't completely desync across the network and now everybody's got their own custom view of health, positions etc. Curious if anybody's ever written or youtubed about this topic, I think almost everything I've seen written on UE multiplayer was server-authoritative.

[rustic sable]

This is EOS? I’m on a deadline to exhibit at GIC, but I’ll loop back around and see if this if something I can leverage. Long term we really need a backend person for this kind of work.

[split siren]

Any idea how to use ERotatorQuantization ? I want to quant a FRotator to 8 bits per component.

[jade scroll]

guys i have a mysterios problem

when i satrt the game i have event begin play print string : self.

4 players... server print 4x string clients print 12 string

[verbal ice]

Ping not really, name is definitely possible

[jade scroll]

but when i move the player start to anotehr palce it dont work anymore -.-

[verbal ice]

Seems like it's only used by FRepMovement

You can check how they use it and implement your own serialization with it

But basically depending on the ERotatorQuantization it uses a different function to serialize

8 bits per component would be YourRotator.SerializeCompressed(Ar);

[split siren]

Thanks, FRepMovement is a bit too deep rabbit hole but I ended up doing exactly what you suggested. Haven't tested it, but it's very similar to the Vector quants so I hope it will work.
Still weird there is no quant FRotator in the engine by default.

USTRUCT(BlueprintType)
struct FRotator_NetQuantize_8bit : public FRotator
{
    GENERATED_USTRUCT_BODY()

    FRotator_NetQuantize_8bit() = default;

    explicit FORCEINLINE FRotator_NetQuantize_8bit(EForceInit E)
    : FRotator(E)
    {}

    FORCEINLINE FRotator_NetQuantize_8bit(double InPitch, double InYaw, double InRoll)
    : FRotator(InPitch, InYaw, InRoll)
    {}

    FORCEINLINE FRotator_NetQuantize_8bit(const FRotator &InRot)
    {
        FRotator::operator=(InRot);
    }

    bool NetSerialize(FArchive& Ar, class UPackageMap* Map, bool& bOutSuccess)
    {
        SerializeCompressed(Ar);

        bOutSuccess = true;
        return true;
    }
};

[split siren]

Just confirming it works well

[modest crater]

Because you dont normally need entire type just to dictate how its data is serialized, TRotator already defines a net serialize which calls SerializeCompressedShort

bool UE::Math::TRotator<T>::NetSerialize(FArchive& Ar, class UPackageMap* Map, bool& bOutSuccess)

If you want to control how its being packed the standard way is to just have it held within a larger struct that holds other data too and then your NetSerialize on that struct would handle packing the members

[jade scroll]

i found the problem with the print strings.

when the player starst from tema a and b are near al works correctly... when i increase the map and make the layer start longer way it dont work anymore

what can i do?

[willow topaz]

I have an issue I have never ran into before and I am hoping someone knows what is going on. I have a multiplayer level where the instanced meshes are loading with different texture resolutions on different clients. On one machine it will look normal and the the other it is pixelated. When you instance a mesh in multiplayer, is it somehow effected by 1 machine? This is a dedicated server model if that helps.

[jade scroll]

guys i dont know what can i do

its mysterious....

[sinful tree]

This likely has to do with network relevancy. In order to conserve bandwidth you don't normally replicate all data about all actors in the world, including player pawns and the engine by default does this for you VIA network relevancy. If you have data about a specific player that you always want available to everyone, you want to store the data on the PlayerState which is marked as Always Relevant so it always replicates, but it's slower.

[jade scroll]

when palyer start near middle point 000 all works fine

player start away from middle point and it dont work anymore

how is this possible -.-

wow i solved the problem 😄

and all wha tpeople told me here was totally wrong like allways xD

[kindred widget]

What was the problem?

[jade scroll]

xD i dont post here sorry

[verbal ice]

If you're gonna be an asshole don't bother asking

Every time you talk here it's to be a prick

No wonder nobody wants to help you

[jade scroll]

nobody cant help me xD

thtats the true .

[verbal ice]

Cryptic messages don't help, can't help when your info is all over the place

[jade scroll]

this shiiitt to find out cost me a fkcn week -.-

1week 24/7 -.-

[rustic sable]

it's called learning

[upbeat basin]

Why is it not possible to create replicated components on clients (without wanting it to be replicated/networked for that case)? Or is it possible and I am doing something wrong? I want an effect to work locally and creating the component on the target client's character. Then that client gets kicked from the server due to

[2024.10.15-06.29.39:027][959]LogNetTraffic: Error: ReadContentBlockHeader: Client attempted to create sub-object. Actor: BP_Character_C_2147480482

and

[2024.10.15-06.29.39:028][959]LogNet: UNetConnection::SendCloseReason:
[2024.10.15-06.29.39:028][959]LogNet:  - Result=ContentBlockHeaderInvalidCreate, ErrorContext="ContentBlockHeaderInvalidCreate"
[2024.10.15-06.29.39:028][959]LogNet:  - Result=ContentBlockHeaderFail, ErrorContext="ContentBlockHeaderFail"
[2024.10.15-06.29.39:028][959]LogNet:  - Result=ContentBlockFail, ErrorContext="ContentBlockFail"

This is a child class of an effect class which is replicated. I tried setting replicates to false in the constructor with the hopes of solving this problem but still getting kicked

[grave widget]

UPROPERTY(Replicated)
TArray<TObjectPtr<AActor>> SpawnedActors;

void ULyraEquipmentInstance::GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const
{
    Super::GetLifetimeReplicatedProps(OutLifetimeProps);

    DOREPLIFETIME(ThisClass, Instigator);
    DOREPLIFETIME(ThisClass, SpawnedActors);
}

#if UE_WITH_IRIS
void ULyraEquipmentInstance::RegisterReplicationFragments(UE::Net::FFragmentRegistrationContext& Context, UE::Net::EFragmentRegistrationFlags RegistrationFlags)
{
    using namespace UE::Net;

    // Build descriptors and allocate PropertyReplicationFragments for this object
    FReplicationFragmentUtil::CreateAndRegisterFragmentsForObject(this, Context, RegistrationFlags);
}
#endif // UE_WITH_IRIS

Is this replication of TArray<Actor*> SpawnedActors Iris only method?

I copy these code without Iris , but the SpawnedActors are not replicated.

These instances are in a replicated struct in LyraEquipmentManagerComponent which is an actor component. The instances are replicated but the subobjects of instances are not

bool ULyraEquipmentManagerComponent::ReplicateSubobjects(UActorChannel* Channel, class FOutBunch* Bunch, FReplicationFlags* RepFlags)
{
    bool WroteSomething = Super::ReplicateSubobjects(Channel, Bunch, RepFlags);

    for (FLyraAppliedEquipmentEntry& Entry : EquipmentList.Entries)
    {
        ULyraEquipmentInstance* Instance = Entry.Instance;

        if (IsValid(Instance))
        {
            WroteSomething |= Channel->ReplicateSubobject(Instance, *Bunch, *RepFlags);
        }
    }

    return WroteSomething;
}

[split siren]

DOREPLIFETIME(ThisClass, SpawnedActors); should work in both Iris and current replication system.
Make sure that the actual Spawned Actors are replicated on the clients. You might need to explicity switch from Iris to test it.

[grave widget]

The spawned actors is replicated. It is a weapon can be seen. and i make a multicast event in blueprint , the event fire successfully on all clients.

but I cant make the pointer of actor replicated through the subobject of a subobject of a actorcomponent.

I doubt if it is a Iris support function cause there are some Iris code in Lyra

[split siren]

Maybe this will help https://dev.epicgames.com/community/learning/knowledge-base/7y39/unreal-engine-using-the-replicated-subobjects-list

AllowActorComponentToReplicate is needed in the current system if I am not mistaken

[hallow cliff]

hi everyone im developing a co op multiplayer game and im planning it publish with steam subsystem. is anyone published game with this or anyone can recommend to me another online system?

[lost inlet]

Please don't crosspost your question

[narrow prairie]

recent steam subsystem is broken i think

[lost inlet]

Yeah because of course, there are no Steam UE5 games

[narrow prairie]

if u can get a connection going lemme know

[lost inlet]

define "a connection going"? connecting to a game server?

[narrow prairie]

im not that far in development to use game servers, i just wanted to try it trough advanced steam session. in the test modus

i wasnt able to connect with 2 steam accounts

it would find the session but on listen server it was not going to lobby

[lost inlet]

well I haven't used Advanced Sessions so I'm not sure I can help you there

[narrow prairie]

its np

as i said, im to early in development

its prolly something on my end as usual lol

for now i use direct ip to test

[lost inlet]

That's usually fine for testing. And yeah, it usually is something silly. Though in the past I've had the advantage of a) a source build b) dealing exclusively with dedicated servers

[tardy fossil]

theres no way to set a different default NetCullDistanceSquared is there? default value is really low

like globally, not per actor

[nova wasp]

looks like it's hard-coded in 5.5 which is surprising

Engine\Source\Runtime\Engine\Private\Actor.cpp:220

[tardy fossil]

i'm surprised the AActor::NetCullDistanceSquared variable isn't marked as config

[lament flax]

i would just make a base actor class for that

and anything else that is "basic" for your project (that cant be done in config)

[cold cipher]

how to make client call the server to fire apply damage?
from client, hit is printed but hurt is not

[proven pagoda]

@thin stratus Thank you for the override tip. I was able to take my only delay out of the game and replace with Event Receive Controller Changed and it looks so much cleaner loading up clients

[thin stratus]

You can't and shouldn't do it like that.

There are two things wrong about what you are trying to do.

1. You generally can't connect wires to a node from somewhere else like this. The Damage, Direction, Source, and DamagedActor only exist on the Client. After your ServerRPC you are on the Server, where those Variables aren't filled. If you want to tell the Server to Damage someone, you need to pass those variables along with the ServerRPC as parameters.
2. You should not let the Client tell the Server to damage an Actor. That allows cheating. Whatever you are doing to find that Actor should already happen on the Server. Only the stuff that the Server can't know about should use the RPC. In most cases that's the Key Input that triggered whatever in the end deals the damage. I can't see the rest of your code, so not sure what that is. It can also be that, in cases where the Server knows about everything already (e.g. an Overlap), that you don't need a ServerRPC at all.

[vagrant grail]

General question :
I'm watching a tutorial bout Multiplayer and the guy shows an example with a non-replicated chest, the raycast happens on the server and the chest opens (animation) on the server but not on the client which is as intended.

My question is this : In a real game where the server isn't a listen server, would the developer still play the open animation of the chest on the server too even tho there's no player behind it ? 🤔 Or leave that part only to clients ?

[cold cipher]

I wanted to prevent no-reg so I make it so when the client shoots, it shoots 2 bullets, one is fake (seen by other players) the real bullet on the client can hit players and apply damage

as for the cheating, it's not like cheaters can't change the values if they are patching the game already

[crisp shard]

when people do blood splatters on client screens (like a vignette, not VFX), are they doing this via a simple widget ? or are they using post process / something more ? and what would be a better option really ?

[twin juniper]

Good question, I thought there wouldn't be any player visuals on the server but I know nothing about it so I'll wait for someone else's reply.

[cold cipher]

here's what happen when I spawn projectiles in server instead of client

[twin juniper]

do you think it would be fair of passing the entire hit struct to the Modify HP since I also want to have the direction of the hit so that maybe the mesh bounce in the corresponding direction...

[vagrant grail]

my ears 👂

[rustic sable]

I'm starting to think this is an engine problem. The IHttpRequest binds to 127.0.0.1 instead of 0.0.0.0 with no way to change it. I've set up port forwarding but to no avail, There was no setting in digital ocean to do this, they said to do it on the server itself.

sudo sysctl -w net.ipv4.ip_forward=1
sudo sysctl -p 

sudo iptables -A INPUT -p tcp --dport 8080 -j ACCEPT

sudo iptables -t nat -A PREROUTING -p tcp --dport 8080 -j DNAT --to-destination 127.0.0.1:8080

on the linux server I can issue the http calls fine but this still won't connect from the outside world. Out of ideas on this one :/

[worthy oak]

Where are you seeing its binding?

[rustic ore]

Is it okay to do a multicast RPC from server to notify a client that they're dead?

    if (Health == 0.0f)
    {
        TryDie();
    }

void UHealthComponent::TryDie()
{
    if (GetOwner()->HasAuthority())
    {
        Multicast_Die();
    }
}

void UHealthComponent::Multicast_Die_Implementation()
{
    Die();
}

void UHealthComponent::Die()
{
    IsDead = true;
    OnDie.Broadcast();
}

[bitter robin]

It's better to just replicate IsDead and do repnotify from there. Of course you can use a multicast too (it kinda depends on your purpose though, like if dead bodies remain around then replicating IsDead is pretty much a must)

[jade scroll]

waht is this error? and waht cna i do?

[worthy oak]

I Don’t Know everyone gives you wrong info here 🤷‍♂️ Google it

[jade scroll]

i googled nothing found

[worthy oak]

Also this is multiplayer

[worthy oak]

https://tenor.com/view/doubt-press-x-la-noire-meme-x-button-gif-19259237

[worthy oak]

So couple things here sorry should have pinged ya. Usually the host level firewall in Linux is disabled by default so that should not be an issue and those commands would relate to that. The binding could be a thing, curious where you seeing that however when your routing it shouldn’t matter to much if your running it in a docker container

[rustic ore]

By any chance, is there a difference in terms of 'which one gets to the client first' when using multicast rather than property replication?

[rustic sable]

sorry I actually goofed when I said that, the Nakama instance is running in docker, not the server instances 😅 yes ufw isn't even installed in this test environment.

[worthy oak]

Gotcha ok. Yes usually it’s disabled and you would manually have to enable it

Which side tangent wouldn’t really bother with

[worthy oak]

So when you ssh into your droplet you can obviously do http requests

[rustic sable]

https://www.digitalocean.com/community/tutorials/how-to-forward-ports-through-a-linux-gateway-with-iptables#installing-nginx

this is what they have to say on the topic which is what I thought I did

[worthy oak]

But nothing outside the droplet

[rustic sable]

correct, and I can ping the IP but the calls dont route

[worthy oak]

And you are allowing traffic through to that port?

[cold cipher]

how to get another player's pawn/actor's server copy?

[worthy oak]

Like on the droplet side

[rustic sable]

really not sure why the unreal FHttpServerModule is 127.0.0.1 instead of all interfaces, wether this is by design or broken.

[rustic sable]

afaik, I dont see a way to set it in the panel

[worthy oak]

Kinda depends it doesn’t always matter

[worthy oak]

I would check there first you will need to forward it on your digital ocean panel

I would look there before messing with the system

[rustic sable]

under droplet>networking you have the gateway, ipv4, private IP, and firewall which is disabled nothing about ports

[worthy oak]

Hmm 🤔

anything for security? I’m sorry not at a computer at the moment

[rustic sable]

no worries, I appreciate the input

let me dig around some more

maybe even drop them a support ticket, 1 eternity later...

[worthy oak]

Yeah I would say if you haven’t messed with that in the droplet side that’s what I’d check first before figuring the system out

because in my own experience I’ll
Mess with the system and then realize I didn’t open the firewall on the VM 🤣🤣

[rustic sable]

yeah totally but there doesnt seem to be much to check and there own docs for forwarding say to do it in linux so 🤷‍♂️

[worthy oak]

Interesting it’s entirely possible they have changed it and I’m spewing BS lol

[rustic sable]

eh, as it goes, these things are never up to date so I'll ping them as well

was hoping to have this done by gic.gd I actually was selected to showcase my project

so was hoping to add a few bells and whistles

[worthy oak]

Oh sweet!!

[rustic sable]

thankfully I still have the stable build 😅

[vagrant grail]

anyone please ? 🙂 ☝️

[rustic sable]

only if you need the timing of the opening for smth, say once the opening animation is done smth is triggered

so depends

[vagrant grail]

what ?

[worthy oak]

Not understanding what you mean, not sure why you would want the animation only server side

[rustic sable]

you're asking if this should happen on a dedicated server?

[vagrant grail]

no that's not my question

[twin juniper]

why would the server render the player, is this needed?

[worthy oak]

Definitely not understanding

[worthy oak]

It wouldn’t if it’s dedicated

[rustic sable]

render no, but know bone positions potentially yes

[vagrant grail]

no, the opposite, like I don't see a reason for the animation to happen on a dedicated server, so my question is if I'm correct on this, and a chest animation shouldn't be played on a dedicated server. It should only be played to clients

[worthy oak]

Correct yeah

On a dedicated server rendering doesn’t happen it strips a lot of thet and just “crunches the numbers”

So the animation call would not play on a dedicated server cause there isn’t anything to render

[vagrant grail]

does it do that automatically for us or we still have to handle that ourselves ?

[worthy oak]

So it would effectively only be client side

Automatically

[vagrant grail]

oh interesting

[worthy oak]

It’s just how it’s compiled

Cause with a listen server it’s your game client + whatever the server needs

Dedicated server is just that. What’s needed for your server

[vagrant grail]

yeah

[twin juniper]

uhh, are you sure?

[worthy oak]

Mhm just how it compiles cause it isn’t compiling a game client

It’s just compiling the server

with no client

[vagrant grail]

source ?

[worthy oak]

Not sure what you mean sorry

Yes you need a source engine for dedicated servers

[vagrant grail]

no 😄 I mean do you have any sources to back up your claim ? 😄

[worthy oak]

Oh oh gotcha haha 🤣 I can try and find one if you would like but that’s one of the differences between dedicated and not

You can test this by trying to run for example a UI call on the server

[rustic sable]

look at the packaged sizes of a client vs dedi server

[worthy oak]

You will get an error of it being null

[vagrant grail]

yeah but where I'm not sure it's about the "automatically" part 🥲

[worthy oak]

Probably a poor word choice

It’s a difference in compiling

[twin juniper]

I think unreal engine does most of it under the hood, which isn't really automatic

[worthy oak]

You aren’t compiling the game client

So what’s left is just what’s required to run the game server

[vagrant grail]

yeah but that's what I call automatically, like we don't have to do that ourselves as UE handles that for us behind the scenes 🙂

[vagrant grail]

your bio made me laugh 🤣

[worthy oak]

Hahah good 😁😁

[worthy oak]

Yes and this is kinda what I meant 🤣 like you don’t have to do anything special for it just compile a dedicated server

Maybe Automagically is better 🤣

[hollow eagle]

Assets on dedicated servers won't be set to null, but anim sequences and other assets may opt-out of saving their derived animation data. So the asset will exist, it just won't contain the actual animation data aside from some metadata like animation length.
Whether they do that or not is controlled by settings in both the project itself and on the asset.

[twin juniper]

sure but not for dedicated server stuff

[worthy oak]

Ah nice there ya go 😁

[vagrant grail]

what do you mean ?

[rustic ore]

CMIIW there's a setting in skeletal mesh component to tell dedicated server to play animation for keeping track of bones transform

[hollow eagle]

the animation itself still needs to contain the data to update bone transforms, which is not controlled by the component

it's controlled by a project setting and settings on the asset

[rustic ore]

it's this property IIRC

[hollow eagle]

That controls whether bones are being updated, not whether the animation data exists.

[rustic ore]

Oh sorry, I think I misunderstood the question 😁

[ember slate]

1. There are real games where the a listen server is used
2. In the case of a dedicated server, the animation won’t play, but you still need to replicate that the chest opened so other clients know

[vagrant grail]

1. I know that
2. I know, here I was referring just to the animation of the chest

[ember slate]

It really depends on your game btw, but its unconventional to replicate animation data, though your game might depend on it

Its all up to you, you may even do no replication at all and have the chest completely client sided

[vagrant grail]

The question was more if that's handled by the engine behind the scenes or do I still have to do it my self by checking if when we're on the server if that server is a dedicated then do not play the animation

[latent heart]

What's the "best" way for a client to detect another client has left a server? Is there an event or something? APlayerState::OnDestroyed() seems reasonable?

[proven pagoda]

My primary weapon TObjectPtr<AWeapon> has mysteriously stopped replicating. The OnRep_PrimaryWeapon repnotify is not hitting any breakpoints, however I still have the DOREPLIFETIME(ABaseCharacter, PrimaryWeapon) established, and the ReplicatedUsing=OnRep_PrimaryWeapon. I put breakpoints I see my Character_2 on the server is spawning the weapon and all the data is valid, but no clients ever get a replicated value and the OnRep_PrimaryWeapon never triggers either

This was not an issue yesterday and I've only been working on lag compensation in an actor component and I restarted the editor and it won't replicate now

[proven pagoda]

nvm

[prisma snow]

Can a On_Rep function be called more than once even if the server value only changed once?
I have a boolean value, upon change I want to run a function in clients. Gameplay-logic wise, there is no need to check if the value and the previous value are the same.
However, if the On_Rep would "accidentally" fire more than once, it would be problematic.

[rustic sable]

how long does it take for the state to be destroyed in case of a disconnect?

[latent heart]

A good question. That's my worry.

There's a log out function on game mode, so you could send a multicast or something to say they've disconnected.

But we're trying to keep unnecessary network stuff out

[lament flax]

Its only called if the server changed the value

And by default, if its a different one

[lament flax]

Why dont you use a netmulticast on the logout server event ?

[latent heart]

Because I think taht information is already being sent to the clients somehow and I don't want to double up.

If I can avoid it.

I just don't know how yet. 🙂

[lament flax]

All i know is that the server gets a event for any client, the client locally has a event for himself

But i dont see why there would be something between clients

[latent heart]

Well the server has to tell the other clients that the client's pawn is dead or removed, right?

As well as their player state.

[prisma snow]

excelent, thank you - it's what I expected but wanted to be sure

[lament flax]

Well this would be replicated ?

But a pawn/player state destruction can be linked to something else than a disconnect

[latent heart]

Yeah.

Hence my question. 🙂

[unkempt tiger]

ive been trying to get my player characters to initialize properly (so the very first frame, simulated proxies will appear in their correct state, holding the right weapon, aiming towards the right direction, with valid animations) for so long

with no success

i wana die 😅

[latent heart]

Loading screen.

Fade in

[unkempt tiger]

true, tho i mean like, when players respawn into the match

and you're running around next to their spawn points

looking at them, there are like 5 different jitters before it falls into a stable state

[unkempt tiger]

its also hellish to test since I have to record my monitor with some slow motion camera to try and figure out what the hells going on. (well, I don't have to, it's just what im defaulting to)

[latent heart]

Make them invisible for a moment.

[vapid gazelle]

Could use some advice. What's the best practice way to trigger in-game sounds in a multiplayer context? Do most people just stick to multicast calls, or is there a more idiomatic way of making sure that a non-2D sound "e.g. an explosion, or footsteps, or something being hit, or maybe a jump" is played across the network?

I remember someone suggesting using animation notifications in certain cases, which would save you the need to explicitly use RPCs

[fossil spoke]

There isn't really a best practices when it comes to cosmetics, other than, execute them from whatever you can deduce on the Client already.

What I mean by that is, for example, the CMC has events for when you "land" that is managed in all network contexts. You would use that event to play cosmetics (like a sound) locally, instead of using the Server to Multicast that.

If you have a Weapon system, where by, when you switch Weapons, the new Weapon is replicated to the Client as the "current" Weapon, you can play cosmetics (like a Weapon switch/equip sound) from that event, instead of sending another RPC along with it.

For any cosmetics you cannot execute from already existing events, you will want to use an Unreliable Multicast RPC.

Using AnimNotifies is irrelevant in this context, since they need to be told to play at some point by the same data you would use to trigger sounds to play.

Like a Weapon firing animation for example.

That Anim needs to be told to play by some replicated event/data on Simulated Proxies at some point.

So using that same event to play sounds doesnt change anything.

[vapid gazelle]

I see, appreciate that explanation. Sounds like the rule of thumb is "is there already an existing path to run cosmetics across the network? If so, you might want to re-use that. If not, you will have to manually trigger this through a new path"?

[fossil spoke]

Pretty much.

[quiet yarrow]

managed to get several hundred more in. Turns out my networking settings were throttling it quite a lot by default. Had to increase to a more modern level. I think by default the limits are set for something like mobile games

[daring gorge]

what settings did you change?

[quiet yarrow]

In the defualtengine.ini

ConfiguredInternetSpeed=8 Mbps
ConfiguredLanSpeed=8 Mbps
TotalNetBandwidth=8 Mbps
MaxDynamicBandwidth=1.28 Mbps
MinDynamicBandwidth=0.16 Mbps
MaxClientRate=6.4 Mbps
MaxInternetClientRate=6.4 Mbps

these arnt the offical names or values, but this is what they end up being in a simple format. This might be a bit more than needed, but my game is very physics heavy so a high network speed is needed

[/Script/OnlineSubsystemUtils.IpNetDriver]

[/Script/Engine.GameNetworkManager]

[/Script/Engine.Player]

If you want the raw .ini settings I used I can send them

[daring gorge]

do you have any resources for info on these settings and what would be optimal for a normal pc game?
im not having many physics actors however i might need em after i test my current set of actors i have : )

thank you for sharing this too irrespectively!

also what engine version are you using?

[quiet yarrow]

tbh not a lot of documentation I could find on these settings

[daring gorge]

i see, not a problem
i shall search and i have screen shot what you sent as a reference to look back into

[quiet yarrow]

One thing I still cant confirm is what the value they expect to be given in the config. My current assumption is that its bytes. So thats why I converted it to 8mbps for ease of reading. So just keep in mind when you change those settings you gotta convert the mbps into bytes

btw im running 5.4.4

[daring gorge]

i see, ill keep that in mind and ah lucky! you get to use GAS and other stuff like physics prediction

im using 4.26 and its being buggy with actors with root as skel meshes

[quiet yarrow]

not sure if its a thing in 4.26, but staticmeshactors are req to simulated+replicate any actor afaik

not sure if thats whats causing it to be buggy for you tho

[daring gorge]

its skel meshes thats being buggy, when attaching anything to a static mesh it works fine, however if skel mesh is simulating physics and i attach smth to it, it goes through some weird delay

[quiet yarrow]

you mean like they lag behind when the skel mesh moves?

[daring gorge]

yeah

[quiet yarrow]

I had that issue in my version as well

but I got it working even using constraints

are you sure its due to the version?

[daring gorge]

i dont know, its weird cause the code works perfect with any actor that uses static mesh as the root, however if i use static mesh as root and have skeletal mesh attached to it// use skel mesh as root it behaves differently

[quiet yarrow]

keep in mind im not using predictive physics or any of the fancy new physics async tools anymore. Just SmoothSync

[daring gorge]

im only using smoothsync

i changed root to be static mesh and attach player to it and it works fine but im yet to go and test all this in real world

[quiet yarrow]

gotcha

I assume you set ownership aswell?

[daring gorge]

no, i didnt need to because im only attaching player to a vehicle and passing input to the vehicle.

i did try possession and ownership however it didnt work, my vehicle(for instance my boats) start to bounce around in water everywhere for god knows why

[quiet yarrow]

hmmm

im guess for this boat you want other players to enter it aswell?

So why dont you set the owner of your skeletal mesh player to the boat?

then when you exit set it back

[daring gorge]

hmm could, however i made a simple component that does the attachment on server and it works fine as of now, no jitter or lag or corrections either.

it also is a good plug and play component for me, i can pretty much just drop it at any actor and it becomes a vehicle so why touch something that works unless it doesnt behave in the real life test

[quiet yarrow]

so what lag scenerio are you talking about?

[daring gorge]

this is before i did the component, i tried to possess the pawn and set the ownership

and attachment being with component but with skel mesh on the vehicle

[quiet yarrow]

ah gotcha, well im glad you got it resolved. If you got any physics issues im starting to learn some of the quirks of this engine

so I might be able to help

[daring gorge]

i shall connect with you in dms as for now if thats okay : )

[quiet yarrow]

for sure

[wet nymph]

I'm facing a similar problem, I increased these limits and it works for developments builds, but shipping versions doesn't seem to be affected by these changes, happened something similar to you?

[quiet yarrow]

Havnt tried shipping builds yet

[wet nymph]

Oh, ok, thanks anyways

[quiet yarrow]

but im pretty sure if you can get it working in dev there is a way to get it working in shipping

[wet nymph]

Yeah, but it's hard debugging a shipping build

[quiet yarrow]

but im not worrying about the shipping build until I wanna do a demo or get closer to publishing

[quiet yarrow]

ah, yeah I bet. Lmk if you end up finding something!

[vague spruce]

i think i know the answer to this but figured i'd ask anyways. can a server function live within a local player subsystem? i have to assume no because the subsystem does not live on the server?

[nova wasp]

it must be something replicated... I would suggest a controller component if you want to keep things separate code wise but for one player only

you can just have the local player subsystem call the other replicated object?

[static owl]

Hey guys! So here is my Health, and Death code. My issue is that whenever my player dies, the Death Widget is spawned on all clients. How can I spawn it on only the client that died?

[west bluff]

Hi!

I am having an issue implementing a basic root yaw offset (based on Lyra). When it enters the 'accumulation' phase—where the character’s model should remain still—it visibly shakes and jitters. The greater the delta yaw, the more noticeable the shaking. It's worth noting that this only happens with remote players; locally, the character remains still.

Interestingly, Lyra works as intended without any noticeable changes to my code. I have tried increasing net sync, server tick rates, and replicating root yaw offset, but all have yielded the same result.

I would really appreciate any help with this, as it’s driving me crazy!

Thanks

[nova wasp]

investigate if they change pawn view rotation in their custom character pawn

[west bluff]

You mean, like toggling bUseControllerRotationYaw ?

[nova wasp]

no, things like GetViewRotation etc

you need to understand what values are actually being used for the rotation and where they come from

raw-replicated properties most likely will need to be smoothed somehow if they aren't already

the controller would not exist for sim proxies anyways if that helps, you only have their pawn and playerstate to get information from as a sim proxy

[west bluff]

ah, yes, it is calculated from GetActorRotation, computing the delta yaw from last update

they do in the anim bp

[nova wasp]

then it might depend on if something else smooths their characters actor rotation on sim proxies

they may be using a different cmc interpolation mode

[west bluff]

ah that would make sense, since smoothing the RootYawOffset reduce the jitter but no solve it, it oscillates side to side

[nova wasp]

you may want to override PostNetReceiveLocationAndRotation or something to catch when new rotations arrive

[west bluff]

thanks for help, will dig a bit more following your advice!

[nova wasp]

You could even send rotation in another separate property if you like but I would argue it's better off in one single actor position replicated property to keep changes happening at the same time

[west bluff]

but is rotation already replicated by default, right?

[nova wasp]

if you replicate the actor transform, yes? you may want to actually confirm this is happening as you expect

[west bluff]

I see, thanks for help. Will perform some tests and see if could solve this. Will comeback if no :P. Cheers

[tiny mauve]

When should i be using the reliable checkbox for replication

[chrome bay]

If it's a) an infrequent call and b) the game would not recover if the request is dropped

[rustic sable]

Thought you may find this interesting but tech support from digital ocean said everything is setup correctly but the unreal web server needs to be bound to all interfaces (0,0,0,0) instead of 127.0.0.1. Afaik there is no way to do this with the FHttpModule so looks like this is hosed 😅

[lost inlet]

I'm not scrolling through the lore, but you're hosting a web server using the HTTPServer module?

because with that you can absolutely change the bind address, it's read from Engine INI here: https://github.com/EpicGames/UnrealEngine/blob/ue5-main/Engine/Source/Runtime/Online/HTTPServer/Private/HttpServerConfig.cpp#L17

"localhost" is the default value for the default bind address

https://github.com/EpicGames/UnrealEngine/blob/ue5-main/Engine/Source/Runtime/Online/HTTPServer/Private/HttpListener.cpp#L64
it can be set to "any" or a specific binding IP

[wet nymph]

There is a way to throttle the number of RPCs sent per second or it can only be controlled by the RPC caller?

[rustic sable]

awesome, thank you. Just discovered that it runs an UpdateConfigs function pointing to the GEngineIni. Also lol @ the lore 😅

[balmy gazelle]

Got a general question for multiplayer experts:
The game have a manager that's an actor basically, it have a seed for random values that's shared across all players, this thing calls world actors that are the same for all players, just call what component is visible on each as the manager changes them, those actors aren't intractable just on their collisions and visibility to the player.
Whats the best way to approach this, having the manager on each player manage all on each client or replicating the state of each actor and just run the manager on the server ?

[thin stratus]

I would probably run the manager on the server and replicate individual state. Could help with relevancy stuff. You do get an overhead for all the different actor channels I guess.

[final bluff]

Hey! , i just installed smooth sync and its working great . Curious though , I am runnin into issues trying to "Set actor Location" on a smooth sync pawn. Have u came across this issue?

[wet nymph]

Why are my actors on the "NetworkObjectList" if they aren't replicated, is it normal?

[balmy gazelle]

Thank you Cedric!

[wet nymph]

My game is crashing because it's keeping a lot of invalid references 🙁

[twin juniper]

I have a TSubclassOf<GameplayEffect>, tho, to apply it, I must transform it into a GameplayEffect*, how would that be done safely?

[kindred widget]

Apply it? Do you mean give it to the ability system or activate it?

Oh, Effect.

No, you don't need a pointer. There are helpers for that. ApplyGameplayEffectEtcEtc

[twin juniper]

I'm in C++ tho

these would be really helpful

[kindred widget]

Then check UAbilitySystemComponent::BP_ApplyGameplayEffectToSelf. You'll see all it does is get the CDO for the effect. That said I recommend doing your abilities in BP quite a bit. That was one of the intended things was to allow scripters easy access to make abilities.

[twin juniper]

I get that but I really only need to apply it and nothing else is needed

[static owl]

Is anyone able to help with this?

[static owl]

SOLVED: ACTUALLY, just gonna leave this here: you only need to create a custom event in the player controller, and then upon death have it call that event. I was calling it in the character blueprint before which was the issue.

[kindred widget]

This code is exceptionally convoluted. Apply damage doesn't need a ServerRPC. AnyDamage won't run on a client to begin with and so you'll always be on server here.

You should not multicast anything death related. It's all state. Server sets health and a flag like IsDead. Both of these should be replicated, probably OnRep.

In the IsDead onrep. if Islocallycontrolled is true, and IsDead is true, then you do things like say they're dead, disable controls, etc and pop up a widget. You can also choose to put this behind a ClientRPC too when the server sets IsDead to true.

Regardless of IsLocallyControlled in IsDead's OnRep, you set ragdolls and such, the death state. Because everyone needs to see this regardless of late join and whatnot.

None of this should be a ServerRPC or a Multicast though since it should trigger on server and be told to clients. And it's state based so no multicasts.

[serene sand]

does anybody know if an actor with expose on spawn replicated property will consistently replicated and ready when the replicated actor trigger begin play?

[fossil spoke]

Yes, they should, they will be sent with the initial bunch.

If their values are different from the default

[serene sand]

thanks!

[vapid latch]

Hello, new to UE5 and was doing a multiplayer starter project with a friend, but running into an issue with nonhost user velocity. Don't want to spam the channel with wall of text but happy to provide more details.

TLDR is we have rooms individually spawned (using SpawnActor), and some of these rooms are rotated (through spawnactor input transform). A nonhost user is able to move fine, but when they enter the boundaries of a room that was rotated the nonhost's velocity is altered by the same transform the room was. The nonhost is unaware of the issue until they perform a syncing action (jump atm). We tried to troubleshoot through blueprints to no avail. We looked through the cpp, and think it has to do with APawn::AddMovementInput or APawn::PostNetReceiveVelocity. Our next TODO troubleshoot is to override APawn::PostNetReceiveVelocity with a custom subclass for more insight/visibility, but the project is very simple atm so we suspect it's more likely we are missing something.

[verbal ice]

Are the rooms replicated

It's probably based movement

[nova wasp]

when a character stands on a moving object that object becomes their movement base

this is to support things like moving elevators and things

the server may have decided they moved based on the rotation of the room (weird, but I imagine it might get stuck somehow)

[gloomy pebble]

Hey I have a weird VOIP question. I have integrated Vivox into my UE5.4 game, but now I want to extend it to model things like walkie talkies that still work if dropped into the level. any ideas? I've thought about having an actor component "listen" to the positional audio channel and retransmit onto a non-positional channel and then retransmit the other way at the receiving end. Has anyone done this before or have any advice?

[subtle kernel]

guys, how do you test disconnected client case in dedicated server? I want to keep player avatar in game for some time if connection is broken. Is there any built in functionality for that?

[twin juniper]

i am the left player in the main viewport and when i attack the player in the right side in the main viewport it works normally and reduces health as per i want

but when i am the right player in the viewport and i attack the left player, in one hit it is registering as double hit and reducing health twice

this is my main problem

btw i am using blueprints

[glass crescent]

Hey guys ,
Need help in the replication movement , i moving my Character derived plane, then on changing the transform there is a lot of lag on the client side .