multiplayer

[dark edge]

This is a weirdass way to just multicast playing an animation though

Why not just multicast Punch and have Punch play MyPunchMontage

So control rig can't have keyframed timelines?

I'm sure it has some concept of "an animation"

play control rig sequence

or whatever

[torpid mantle]

hiya, when talking to a server via http.. the json responses you are getting, should those be mapped to uobjects? is this typically how its done, or doesn't matter

[halcyon totem]

I have a question regarding dedicated servers , is there any way to control the game? for sample, if I have 2 different game modes in my game, but when I start my game it starts on TDM, how can someone change the game mode if the server needs to be running?

while the server runs it just shoots out code in the DOS looking window, but how can someone change stuff like game modes? if its running in TDM, and someone wanted to play DM how can they change it if they are just clients

can anyone recommend any good blue prints or plugin from the marketplace that might have a solution to my problem?

[dark edge]

Vote, admin roles, any other way

Console commands, etc. Look at how other games do it.

[halcyon totem]

how about a tutorial to set up a poor mans dedicated server, where for example, I can run a dedicated server on a PC in my room and you could connect via IP? do you you know of any good links?

[fathom aspen]

You see his name up there?

[dark edge]

You can just do that right now, just launch game as server

for building, just google how to build dedicated server and follow the documentation

[stark tree]

Hi, simply want to use the Collab Viewer template over 2 different internet connections. Absolute beginner here, please help. I have 2 laptops and they connect over LAN but not over the internet.

I have read the official documentation that asks the port 7777 to be open and stuff. It is open on both of my wifi. It still can't find the other one

[scenic turtle]

Hi all, I would like to select the spawn location of the user, before they travel to the dedicated server. So user will select from 4 spawn points on the startup map and then they travel to the dedicated server and spawn on the locations that they choose. For this I use the override ChoosePlayerStart , GetAllActorsOfClass (PlayerStart) in GameMode and also the Gamestate to create a variable which can be modified from the client side as well. In player controller I create a Run on Server RPC and I try to call that from a trigger box on the startup map, with no luck. I guess It is something to do with the ownership of the triggerbox or I am not sure. If you know some other way to accomplish this, please let me know. Thanks!

[marble gazelle]

"then they travel to the dedicated server" so they are not connected to the server yet?

[scenic turtle]

no, they are not and I think probably there lies the problem.

[marble gazelle]

well yeah, you can't send RPCs to a server you are not connected to xD You'd need a backend service your players login to, then send their spawn positions to and these then need to be forwarded to the server instance they will connect to.

[hollow eagle]

Not entirely true, you can use beacons to communicate with a server that you haven't connected yet https://docs.unrealengine.com/4.27/en-US/InteractiveExperiences/Networking/OnlineBeacons/

[marble gazelle]

Interesting, didn't know about that, thx^^

[odd jacinth]

,.3

[mortal kernel]

Hey I'm having a camera shake that scales up with a timeline :o how would I replicate this shake? The process rn is the following:
OnBeginOverlap -> Authority only -> Cast to my pawn -> add to an array of overlapping actors-> The player camera manager for the overlapped player-> add that to another array-> then check if all players are overlapping -> if true -> Get all Camera managers (from the previous array) -> Start Camera shake (it's an endless shake that starts with a scale of 0) -> then start playing the timeline which increases the scale over time

[old yoke]

I'm trying to follow the documentation on extending saved move data for the character movement component, but can't figure out where to actually put the data into my custom FSavedMove_Character. I've tried to override FSavedMove_Character::SetMoveFor, but my override is never called.

[tidal lichen]

Hi, any ideas if it is possible to link actors server client manually? For example:

1. Server spawns new actor 'ServerActor' (not replicated)
   a few minutes later...
2. Client spawns new actor 'ClientActor'
   a few minutes later...
3. Server enables replication for actor 'ServerActor' and sends RPC with some ID
4. Client receives RPC, finds 'ClientActor' by ID and somehow pairs theirs networking stuff,
   so that 'ServerActor' replicates as 'ClientActor' on clients from now on

[latent heart]

You could spawn an actor on the client, like a preview one, and when the server gets around to replicating the proper one just delete the preview.

[tidal lichen]

yes that is also possible solution i had in mind

[twin juniper]

@tidal lichen I don't think it works.

Hello guys.Also when I am implementing replication graph I see a line where class names starting with skel and reinst are not added at all?.What are those classes??

[livid mist]

Anyone know why the rotation of a player isn't replicating to other clients? The code that happens when you're rotated is replicating, but visually the player does not rotate for anyone but themselves.

[twin juniper]

Are you doing it via anim bps??What do you mean visually

[livid mist]

No, the rotation of the capsule changes. But the clients can't see each other rotating

[twin juniper]

A video might help

[livid mist]

one sec 🙂

Also my character is acting strangely too. I'm reworking a lot of my code, so temporarily I set the character model to play just 1 animation, but for some reason it's only playing the idle and not the one I selected.

The player doing the rotating can see the rotation happening, but the other can't

Give me a moment, I'm recreating my bp from a fresh one. I'm still learning so may need to start fresh

[twin juniper]

Try to do a multicast of your rotation

[mortal kernel]

Is Global Time Dilation replicated? or do I need to do that?

[prisma snow]

I used that functionality some time ago, so it might have changed, but afaik there is a json to struct parser, in which the json data gets dumped into a matching struct.

As I needed to use the data in UObject form, I wrote some utility functions that did the conversion, but it shouldn't be necessary in all cases - use the simplest approach you can unless you need something else

Just so you don't have the same problem as I did, it can happen that some json field changes and then the matching struct field will be empty. Once I spend a good while debugging and it was a change in json naming, nothing on my end

[floral crow]

[2022.04.04-18.50.30:925][ 8]LogNet: Warning: UActorChannel::ProcessBunch: SerializeNewActor failed to find/spawn actor. Actor: None, Channel: 12

Any idea of what could be causing a replicated Actor to be "None" on a client? This is during a seamless travel. The client immediately crashed as soon as the seamless travel finished

[floral crow]

Here's the rest of the log during the seamless travel, in case someone can spot useful facts that I'm missing

[winged badger]

where is your callstack?

this generally happens when server sends a NetGUID for an Actor with a static NetGUID that the client doesn't have

since this happened right after loaded world

i don't think you messed around with spawning actors with matching names on server and client

with IsFullNameSupportedForNetworking being true

other options include some Actor classes not being loaded on client

[fathom aspen]

I've done something similar in the past. You can look into APlayerState::CopyProperties to copy info from the old PlayerState(the PlayerState of the level you're travelling from) to the new PlayerState(the PlayerState of the level you're travelling to) and you might also wanna use APlayerState::OverrideWith

[winged badger]

you can, only if you're connected to dedicated server lobby beforhand

otherwise there won't be a playerstate to persist

[fathom aspen]

ofc

Isn't he?

[fathom aspen]

This is what it ended up looking like :P: https://www.youtube.com/watch?v=KZwREm3CWwQ&ab_channel=WizardCell

[fathom aspen]

I remember you helped me so much at the time 😄

[winged badger]

if you're not connected to dedicated server lobby

you can still stash the location in PlayerState

use the APlayerState::PostNetInit override to RPC that location to server

and then run the HandleStartingNewPlayer on server from that RPC's _Implementation

the PlayerState would need to pull that information from something persistent though, and PlayerController is better for this use case, as it will replicate first due to its higher NetPrioerity, making starting delay less

[fathom aspen]

I'm still not getting the meaning of this. If they are not connected to a dedicated server lobby, then what are they connected to? Where do they pick there spawn location from?

[winged badger]

you could, in theory, pull the game info from session data

then have a lobby on your own local machine

in case you are hot joining into an ongoing match, for example

in that case your connect to dedi is a hard travel, and you don't have a PS persisting

[fathom aspen]

Ah I get it now. thanks!

[floral crow]

If you mean the crash stack, it is very cryptic. I debugged the minidump, and arrived to the conclusion that the actor was Null

[floral crow]

I'm adding an actor that should be carried over through SeamlessTravel using GetSeamlessTravelActorList. It makes sense that it is this actor the one causing issues, but I don't get why.

Here's how I'm adding it to the list. Is there something wrong with my approach?

void AMyPlayerController::GetSeamlessTravelActorList(bool bToEntry, TArray<AActor*>& ActorList)
{
    Super::GetSeamlessTravelActorList(bToEntry, ActorList);

    AActor* MyActor = UGameplayStatics::GetActorOfClass(this, AMyActor::StaticClass());

    if (IsValid(MyActor))
    {
        ActorList.Add(MyActor);
    }
}

[rancid orchid]

This question may actually be better here:
What is the more common pattern:

1. Tell TDM GameMode player has died: OnCharacterKilled(...)
2. GameMode records score / kills and stores them in itself.
3. GameMode updates Gamestate with the data copy (assume in any way).

or

1. Tell TDM GameMode player has died: OnCharacterKilled(...)
2. GameMode tells the game state to update its score.
   So in this case GameState acts like a Model. But this also makes the game mode coupled with the specific game state.

[fathom aspen]

I would use the latter. I wouldn't save score and kills and runtime specific data in GameMode

[latent heart]

Game mode is about flow, game state is about... state.

[fathom aspen]

GameState is the class that does this

[rancid orchid]

I understand GameMode is flow

but to flow you need Data so to get data you need to access the gamestate?

second approach makes you always access the game state for this data.

[fathom aspen]

FYI GameState is a property in GameMode

It's meant to be that way

From AGameModeBase.cpp

[rancid orchid]

Thats all im asking, if it was designed to act as a model, which seems like it may be,.

[quasi tide]

1. GM says "50 kills to win"
2. Character dies - tells the GS. GS checks if the current score has reached the limit set by the GM
3. GM ends the game when it has.

[rancid orchid]

That explanation has a flaw I think, GS is checking the win condition, I assume GM should be doing that.

[latent heart]

I would say the character dying should go to the game mode and the game mode udpates the game state.

[fathom aspen]

As long as you're on the server, it doesn't really matter

[latent heart]

And the GM checks to see if the score limit has been reached

The GS shouldn't handle that sort of stuff.

[rancid orchid]

It matters mostly for readability and in larger teams so im trying to wrap my head around most used pattern 🙂 .

[latent heart]

GS should handle holding vars and rpc broadcasts to all players about game stuff

[rancid orchid]

I agree with Daekesh, sounds like UE is designed for GS to be a large Model class (somewhat)

[quasi tide]

It could go either way imo. One or the other isn't necessarily correct imo. My honest recommendation would be to do it however it makes sense to you.

[rancid orchid]

I kinda dislike the pattern set 😂 but its not far from what I would do.

Cool cheers, that kinda solves that.

[quasi tide]

It's probably overall easier to do things like you said, due to the GM guaranteed to be on the server only. But really, just do what is understandable to you.

I do it this way because GS is the "state" of the game and GM is the "rules". So to me, when the state changes (adding 1 point for example), the object responsible for handling state should be the one to change it.

Could just as easily reason about that GS is just a representation of the state of the game, where the GM makes sure the rules are followed as well.

[latent heart]

I prefer a MVC approach myself.

[quasi tide]

Either is fine imo. The most important thing, imo, is that you understand w/e way you work with.

[latent heart]

That is one of the advantages and disadvantages of UE. There's 50 ways to do everything and 1/2 of them are probably correct.

[fathom aspen]

The thing with this approach is that you will keep calling delegates to GM each time a score is updated in GS for the GM to check if the limit has been reached. Instead if this check was done in the GS, you would delegate once the limit has reached

[latent heart]

Why when the GM updates the score itself?

GS->SetScore(x); If (GameHasEnded() { EndGame(); }

Or GS->AddKill(player); etc

[fathom aspen]

Ah ok I thought that this would be done using delegates , totally forgot the classes are interchangeable 😛

[latent heart]

In my ideal world, the game state wouldn't even know about the game mode!

[quasi tide]

Yeah, but 1998....

[fathom aspen]

passed away long time ago lol

[quasi tide]

It was a lawless time back then

[latent heart]

It's pretty lawless now in UE.

[winged badger]

its fine, although the structure is pretty awkward there

best to have your GameMode stash a pointer (and spawn it if its spawned) to the persisting Actor

im guessing it is spawned here, how is it spawned?

[twin juniper]

Hello guys.Also when I am implementing replication graph I see a line where class names starting with skel and reinst are not added at all?.What are those classes??

[floral crow]

It is spawned by the GameInstance, and I keep a UPROPERTY() AMyActor* MyActor ref in it

[winged badger]

if it persists through semless travel

it should be spawned by server, and replicated

never spawned locally

[floral crow]

It is spawned by the GameInstance, on the server. Do you reckon it would be better to spawn it by the GameMode instead? I put the property on the GameInstance as a guaranteed place to keep a ref to it on clients as well

[winged badger]

it would, because it removes the need for that awkward GetAllActorsOfClass

also, c++ has better options for that, too

for (AMyActor* MyActor : TActorRange<AMyActor>(GetWorld())
{
}

[latent heart]

You could spawn it on the game mode and set the refernece on the game state

[winged badger]

i spawn my persistent actor from base GameMode (shared by lobby and game levels)

i stash the pointer in the GameMode

[floral crow]

In fact, it is the GameMode that does the spawning actually

AMyGameMode::InitGame(/* params */) {
  // code...
  UMyGameInstance* GameInstance   = GetGameInstance<UMyGameInstance>();
  GameInstance->SpawnMyActor();
  // code...
}```

[winged badger]

and immediately set it on base GameState as well

@floral crow do it right after Super::InitGameState

that is the perfect place for it

[floral crow]

Makes sense, will do that instead 🙂

[sharp hornet]

Over time I've moved more and more things to GameState because it's hard to predict what you might want replicated, and my GameModes have gotten pretty small

If cheating is a concern you definitely don't want things on GameState that you are trying to hide from clients

[shrewd tinsel]

can i replicate variable from client to server and then to all clients without rpc?

[pallid mesa]

replication goes server -> client only

[shrewd tinsel]

ok thanks

can i make it so client cant spam rpc?

if i make rpc not reliable

will the rpc go to server 100 percent but not instantly or there is a chance it wont go through at all?

[pallid mesa]

afaik unreliable rpcs aren't resilient towards packet loss

[shrewd tinsel]

what does that mean?

[pallid mesa]

that unreliable rpc's don't ensure that the data will arrive to the endpoint

[shrewd tinsel]

gotcha

thanks

[pallid mesa]

np :)

[livid mist]

I'm back at this point ^^ How do I do a multicast of the rotation?

Found a tutorial for multiplayer gun rotation that might help me actually

https://answers.unrealengine.com/en-US/questions/81290/pitch-and-yaw-replication.html?childToView=818854#answer-818854
Anyone else getting a 404 for this page? 😦

[latent heart]

Yup

[livid mist]

😭

I just need my rotation to replicate...

Everyone always links to that as the answer and it's 404d

[faint eagle]

is GetWorld()->GetTimeSeconds() synchronized amongst all clients and server?

[shell mantle]

I'm new to multiplayer and unreals replication, when making a client -> dedicated server game, which character variables should be replicated and which ones shouldn't be? Like health and what not should be, but if I want to implement a god mode system would IsGodMode variable be replicated?

[prisma snow]

you want to replicate what clients need to know

[shell mantle]

So because you would want all the health calculations to be done server side IsGodMode doesnt need to be replicated?

[sinful tree]

Not necessarily. If you want players to know if someone has God Mode enabled, then you would need to replicate IsGodMode.

[shell mantle]

Ok I see, thank you guys for the help.

[final quest]

Hey! does someone knows how/where i can get an dedicated server for online multiplayer

[fathom aspen]

No. what you want instead is AGameStateBase::GetServerWorldTimeSeconds

[dark edge]

AWS, DigitalOcean, Azure, a shitty laptop, a 10 year old pc in your basement, etc, etc

[plucky topaz]

https://www.youtube.com/watch?v=Iq2LpwXogTw

[dark edge]

Is there any way to make joining a server seamless? That is, completely transparent to the player?

[pallid mesa]

no loading screens using the same map you mean?

[dark edge]

Yeah same map, there's only ever one level in the game

Everyone launches game in listen server

The game loop is a bit like Diablo with its town -> teleport -> dungeon loop but spaceship -> teleporter -> ground level, and ground level is procedurally generated

[pallid mesa]

so many sessions open where any player could join, like in dark souls

[dark edge]

but I'd love to do Spaceship -> teleporter -> Hosts Spaceship without a hard cut

[dark edge]

Yeah like that.

We're trying to be 100% no hard cuts from game boot up to game exit. Only hard cut right now is joining another game

I suppose the teleport transition would be the place to hide it, if it's a full screen VFX of some sort

[pallid mesa]

puf... not sure how seamless you could do it with native unreal travelling methods... you can for sure bring over your position to the new server but the pawn will pop in

[dark edge]

I'm fine with some sort of full screen effect filling the screen then fading to show your dude on another ship, just want to avoid hard cuts to black or a load screen or whatever

[solar stirrup]

AFAIK first connection is always hard travel

[pallid mesa]

you pass by the transition map... afaik... so maybe a fade on viewport does the work

[solar stirrup]

I think I heard something about someone modifying the engine to allow for seamless connection right off the bat, but that'll take a lot of effort

[dark edge]

That might be the ticket, if the screen fades to a blue swirly effect, transition map is just that effect at max intensity, then on connect do the reverse.

On failure you're still on your ship and your ship AI is giving you the error message in game

[pallid mesa]

definitely a good problem

[dark edge]

GameInstance would survive right so that's where I'd have some TeleportVFXIntensity scalar

[pallid mesa]

@solar stirrup think so, although not speking about the actual seamless travel from the engine. When I mentioned "seamless" I meant without artifacts haha

viewport survives, local player survives afaik, gi survives aswell...

local player survives? not sure...

[dark edge]

As long as I can make it visually appear no different then the teleport to ground that'll be fine.

[pallid mesa]

yes I think you'll be able to pull it off specially if you don't need to do any first load

[tawny parcel]

I've got some actors that have somehow become stuck unloaded, if I drag select on the entire World Partition and right click to load, they still dont become loaded. I see the unload all, but is there a load all actors?

Update: Ended up just re-creating the level from a past copy.

[gleaming vector]

@sharp hornet or @flint patrol how much player count testing did you guys do for Lyra? Is there a safe estimation of player counts possible without any significant changes to the codebase? (I don't see a Replication Graph implementation, so I don't assume it's too high)

[flint patrol]

We regularly did ~10 people playtests but no, it's not gonna do, e.g., 100 players without some additional work

[gleaming vector]

rad, thanks for the answer

is rep graph on y'alls todo list?

[flint patrol]

TBD

or rather, yes on TODO list, TBD on if/when

basically, no promises on what arrives in any given release until it's already checked into the depot, but yeah we think it'd be a good idea to demonstrate the rep graph in Lyra

[meager flare]

On Lyra kit, are we actually playing other people or are those just really lethal NPCs? Cause dayum

[flint patrol]

the bots are pretty aggressive, they're not tuned to have difficulty levels or anything, mostly just for testing the game; you can disable them in editor preferences, or make it so they can't shoot but will still run around

[marble rune]

thats what I wondered too lol

these AI are probaply better than the usual shooter player, lol

[flint patrol]

you can also make yourself invulnerable with "UnlimitedHealth 1" (you still take hit reacts but never lose health) or "god" (toggles invulnerability) cheats, which can also be set to run each PIE in the editor preferences

[gleaming vector]

yeah, I understand completely. "on the todo list" is good enough for me 🙂

[meager flare]

Yeah they are better than me, for sure. I got spanked every time so far lol

[ember dagger]

So Im trying to update the visiblity of a spot light on my player once the player spawns so that only the client doesnt see the light source for themself, but everyone else can see it. However, when updating the visibility of the light source it works for the server (The server cant see the light source, but other players can). But when I update the visiblity for the clients, the visiblity changes, but the server is unable to see that light source. Ive tried calling a run on server event from my begin play to a run on owning client and that doesnt work. There is no only owner see for light sources or only relevant to owner. Is there any way I can get this to work? Or something Im failing to do correctly? Ive noticed that the problems shows when updating the visiblity on the server (ie, when changing the servers visiblity for the flashlight, the server sets everyones flashlight visiblity for themself). Thanks.

[dark edge]

@ember daggerTry "Owner No See"

[ember dagger]

that doesnt exist on lights

[dark edge]

Is the spot light a component on the pawn or an actor in the map or what

[ember dagger]

a component

[dark edge]

K just on begin play -> is locally controlled -> set intensity to 0 or whatever

[ember dagger]

that results in the same things. (ie when servers sets their intensity, it also updates everyones intensity to 0 for the server)

[golden stirrup]

Do anyone have the problem, when i spawn a Pawn or Character in multiplayer the clients gets 2 actors spawned while server only 1, after some time i deleted the PawnMovement and give a try, it spawn 1 actor on Client and 1 actor on Server, so i put back the PawnMovement, now i get 2 actors on client and 1 on server

[rocky topaz]

I am working on a coop game and I want players that join a coop session to be able to resume the game alone if they want to, which means I need to replicate the save game data, I was wondering what would be a good way to do that without resending the whole saved data every time

I'm considering making the data to be saved replicate once when the client joins then any update to it would generate a reliable multicast to make clients replicate what just happened

[dark edge]

Depending on what the replicated state looks like, clients could save it themselves

[rocky topaz]

part of the info will not necessarily be replicated if I rely solely on what's loaded (because of level streaming) which is why I'm storing most of my actor info in the GameState but it has a TMap that maps level FNames with TSets of FNames (of picked up actors, it's not that big but still somewhat big)

I could just make this TMap replicated all the time but I feel like it might make things slow and with potentially thousands of FNames in it I feel like passing it over at every update is probably a bad idea

[twin juniper]

Hello guys.Also when I am implementing replication graph I see a line where class names starting with skel and reinst are not added at all?.What are those classes??

[flint patrol]

internal implementation details for blueprints in the editor. skeleton is kind of (it's complicated) the 'header' for the class generated by a BP, with the functions and member variables but no code; and reinst are old versions of a class for instances being replaced during the reinstancing process when you recompile a BP (they should never be seen in practice but stick around after the recompile until the next time GC is run)

[twin juniper]

Okay great.Thanks

[flint patrol]

there's no flag for SKEL, but reinst can also be filtered out by CLASS_NewerVersionExists

instead of funky string matching

[twin juniper]

hello guys

so iam working in 4.27
i started blank project and now i want to make an multiplayer using this project

my first issues is iam unable to replicate character

how to do that?

in 3rd person templet it will be by default right but not in blank project how to do that?

i turned on replication

also

when ever i play iam getting default pawns not my characters

[fathom aspen]

I don't think this has anything to do with replication

You have to specify your pawn class in your GameMode settings

[twin juniper]

ok let me check

[fathom aspen]

Also make sure the level uses the relevant GameMode

(By making the GameMode the default or by setting it in World Settings tab)

[twin juniper]

ya i did one

and only one player is spawning when i select 2 player and play as client

[fathom aspen]

What's the other player then? default pawn?

[fathom aspen]

Also make sure you set the other fields. PlayerController for example if you made one, etc

[twin juniper]

ya the problem with player controller now its working

thx @fathom aspen

any beginner courses for multiplayer using c++

can any one suggest me one?

[fathom aspen]

This is one I started 3 years ago, and finished it a few months back, and I do really recommend it: https://www.udemy.com/course/unrealengine-cpp/

Tom is a really good instructor!

[twin juniper]

thx dude i will check

this

[loud frost]

I set throttle input in event beginplay , so it automatically move , but one player automatic move and other not move

[stark tree]

Hi, can I do the following?

1. Build UE4.27 from source and host a dedicated server
2. use Oculus Quest/Quest 2 devices connected to different Wifi networks (important that its not LAN) and have them join the server
3. They are able to see each other, establishing very barebones multiplayer

I need to know if its possible because building the UE4.27 source will take a few hours and I wanna know if its worth the time. Thank you.

[summer tide]

Hi- I attached my player to another character, not posses. I pass player’s move forward axis value to the character and to add movement input using server rpc. The motion doesn’t appear smooth on client but works fine on server.

[latent heart]

Do it on the client too to "simulate" the server response or it'll never be smooth on the client.

[rancid orchid]

If you just pass it with RPC, the server will move everytime it receives the input but the client will only receive the positions every set amount of time. This means the client will look jittery. You can either try use prediction ( move the client and server at same time and check if they sync up) or interpolate the position of the character on the client from the positions you receive.

Second options means the character will be behind and may look like it has lag (which it will), but depends on what you need.

[winged badger]

CMC is tightly coupled with Character, PlayerController, assumption that predicted Pawn is ROLE_AutonomousProxy and assumption that the predicted Pawn is possessed

you can move non-possessed Pawn predictively with the CMC, but it requires a few alterrations to it

also, you can push your another character's InputComponent to the Controller's stack, instead of forwarding the inputs

[summer tide]

Wdym? Would that help with jitter?

[winged badger]

pushing the input component, no

that was just a side note

i find it cleaner that way

[nova wasp]

I imagine you would have to send movement to the character locally first

While sending it to the server, like daekesh said

[winged badger]

not sure the crude prediction suggested there would hold up in production level test

there is no replay capability there

[summer tide]

What if instead of movement input I pass the axis values to play looped anim montages? Would the player jitter on the character ?

[winged badger]

when autonomous proxy receives a timestamped position update, it replays all its FSavedMoves done after that timestamp

[nova wasp]

And will the server accept saved moves from two clients...

[winged badger]

and then applies that result to the position

sending moves locally to autonomous and RPCing them to server at the same time doesn't have that capability, so it will still jitter

less, but it will

[tidal lichen]

Hi, does anyone know if it is possible to replicate properties to specific clients only? Using RPCs it is basically possible to send data to specific client through player controller, but properties?

For example some treasure box, lets say i want to sync some properties with every client and some properties with clients that are very close to that box

[pallid mesa]

that's what netcull distance is for

• the replication graph and IsNetRelevantFor

basically the definition of what makes 2 pair of actors relevant to each other

that's per actor granularity

so... I think there is no way to do granular property filtering (besides the rep conditions) unless you go deep into a lower level

[winged badger]

more like rewrite half the replication framework @pallid mesa

[light iron]

They did say deep.

[wild patio]

can someone explain to me how SetActorTransform works in replication in a character actor? I set "replicate movement" to false, and then did SetActorTransform on the character actor client side, and it moved the character on the server

i understand i might want the character to also move on server, but if I explicitly say "do not replicate movement", the expected behavior is to not replicate this to the server.

i imagine there's something i'm missing. but i'd love to understand this better so i don't get burned by it in the future

[twin juniper]

Guys can I connect to a dedicated server from browser app

Basically I have to host my unreal app on browser and I am looking to connect dedicated server from it

[pallid mesa]

yes x'D

[plucky topaz]

Question about standard version of Unreal Engine across the team.

If I working on a multiplayer game, that needs to build a dedicated server, to build the dedicated server the project needs to be built with an UE version build from source (Not from the Epic Launcher).

Does that mean that the whole team needs to also have a version of UE built from source? Or just the person building the server?

[winged badger]

you don't need a dedicated server if you don't plan to distribute it that way

and only the one that builds the server needs to get and compile source

[light iron]

Anyone know best method to maintain set master pose mesh combination after travel?

[fossil veldt]

Anybody know as a good way to dump all the metadata / session settings from a session result? I'm trying to do this```
FString Test;
Result.Session.SessionSettings.Get("OWNINGNAME", Test);

[graceful shard]

mind blanking, please help, quick Q:
Is the role of the local player's pawn also Role_Autonomous_Proxy or is that only the Controller's local role?

[shy osprey]

Anyone familiar with why there might be a bit of a lag after the client triggers postlogin? It's making it difficult to set up proper input handling. I get possessed but it's like none of the PC is completely initialized yet

[sharp hornet]

There's always going to be some lag for initial replication of a player controller/player state/pawn. There's not really any control over what order you get things in so you'll need to set up rep notifies for whatever data you need to setup input

[fathom aspen]

Yes, for both

[fathom aspen]

Try your luck here #online-subsystems

[peak notch]

if i set player speed inside the Character blueprint class like shown in the picture can a player change the value of that(basically Hack)?? if so should i use an event for that and set the MaxWalkSpeed inside OnServerOnly Event and then multicast to all clients?

[dark edge]

If you're trying to do multiplayer sprinting its more complicated than that

[peak notch]

i am but in the above i basically want to know if a player can hack and set there own value into the set Max Walk speed since it's inside Character blueprint class only

[ember dagger]

Im just gonna bump up my previous issue from yesterday because Im still unable to solve this problem. Thanks

Heres a video showcasing where im currently at and what its resulting in https://streamable.com/vhsfug

[ember dagger]

Okay, well using this process in the player controller seems to solve my problem

[twin juniper]

Guys can I connect to a dedicated server from browser app.Basically I have to host my unreal app on browser and I am looking to connect dedicated server from it

[vocal scaffold]

There is an experimental WebsocketNetDriver Plugin (engine source found in Plugins/Experimental/WebSocketNetworking/Source/WebSocketNetworking/Public/WebSocketNetDriver.h) which may support your needs if you build the dedicated server with that as your net driver.

[twin juniper]

So instead of default replication graph I need to set this one

[vocal scaffold]

Rep graph has a replication driver which has a net driver. If I am reading the code dependency correct you just need to swap out the UNetDriver instance with the experimental web socket net driver after adding the plug-in.

[twin juniper]

How to swap them.

[vocal scaffold]

Here is the documentation https://github.com/EpicGames/UnrealEngine/tree/c3caf7b6bf12ae4c8e09b606f10a09776b4d1f38/Engine/Plugins/Experimental/WebSocketNetworking

[twin juniper]

Thanks for Info.

[polar lotus]

hasn't HTML5 been deprecated and removed

since 4.24?

or are you just using 4.23

[loud frost]

Any best multiplayer tutorial ??

[dark edge]

no

[twin juniper]

@loud frost there are some in youtube.

Hello guys.In replication graph we have two modes.One is spatialize static and spatialize dormant.What is the difference between two.Like I know we can change dormant to dynamic and static.So if I have an actor as static will it not replicate anything at all.??I have guns which I just need to spawn on server and then on they don't need to replicate at all.But once they got destroyed on server they need to destroyed on all clients.Which one should I choose

[stark tree]

Hi, can I take the new Unreal 5 multiplayer game Lyra, take it apart and use it for a VR meeting app? I just need to use its multiplayer and I need to do it over the internet, not LAN

[dark edge]

Why would you do that? That's like asking if you can take a Ferrari and recycle its engine block, you need a coffee table. I mean you could, but you're starting with something nowhere close to what you want.

[stark tree]

Fair. I'm an intern who's given the task of creating a VR multiplayer meeting app in Unreal Engine that should work on standalone headsets, over the internet, 4 players minimum. I am STRUGGLING to do it for over a month now and at this point just trying to do whatever works.

[marble gazelle]

Well Multiplayer it self works out of the box with unreal. The challenge might be voice chat and replicating the users movements.

[prisma coral]

hey everyone. I am having an issue in my project where the host gets unpossessed from its pawn whenever someone else joins and im just not sure why?

[marble gazelle]

Did you implement who possesses what?

[prisma coral]

no the pawn im using is just the default pawn for the level

[stark tree]

The challenge I'm facing is getting 2 VR headsets to connect. Things work great on PCs but on standalone its tricky

[marble gazelle]

I don't think Lyra will help with VR, what headsets do you use? I think there are some specific UE Branches for some VR Headsets

[marble gazelle]

well the best you can do: Debug^^ break in the possess / unposses code and see who is calling it

[prisma coral]

alright thanks ill give it a go

[dark edge]

I would sure as hell not start with Lyra, just start with the UE4 VR template and go from there.

[stark tree]

Thanks. I use Oculus Quests. I have tried the Oculus UE fork and I just got a lot of trouble

[stark tree]

Thanks. That was my initial attempt. Figuring stuff out rn

[prisma coral]

for those with the same issue set the pawns auto possess player to disabled that fixed it for me

[twin juniper]

Hello guys.I am using replication graph and add network dormancy is not working at all.Whenever I spawn an actor and watching it through debug it is always in dynamoc bucket

[vocal scaffold]

Is it peer 2 peer? They have some specific docs on that for quest. https://developer.oculus.com/documentation/unity/ps-p2p/

[twin juniper]

hello guys

iam spawning an actor and its working in server and clients can see it but when iam trying to spawn the same actor inside client only the owning client is able to see it and interact with that, but in server cant see it and another client is able to see it but unable to interact with that

in wall.h in 87 line thats the function and in cpp line 95

[latent heart]

Spawning an actor on a client will never, ever, be replicated to the server or other clients

[twin juniper]

then how can i spawn that actor?

[latent heart]

Spawn it on the server.

[twin juniper]

how to do it?

[latent heart]

If you have some sort of building system (I guess?) send a server RPC telling hte server what you're doing.

The server will implement the action and the results will be passed down to all clients.

[twin juniper]

ya i have one building manager

over there iam just checking what build i have now like wall, ramp , slap etc

UFUNCTION(Server, Reliable, WithValidation)
this is the one right to send server rpc?

[latent heart]

Yes.

You need to call it on a valid actor, though.

[twin juniper]

ya i did that u can check over there

[latent heart]

Player pawn, player state or player controller

[twin juniper]

so i cant call that in this wall.cpp ?

[latent heart]

You cannot spawn an actor on the client and then send an rpc from that actor to the server.

[twin juniper]

ok let me try that

[latent heart]

You cannot send a server rpc from any random actor. It must be one of the client's authoritative actors.

I would suggest something like: UFUNCTION(Server, Reliable, WithValidation) BuildObject(TSubclassOf<AMyBaseBuilding> ObjectClass, FVector Location) On the player controller.

[twin juniper]

how to know its clients authoritative?

[latent heart]

See the 3 classes I listed above

[twin juniper]

can i use this inside character class?

[latent heart]

Yes

[twin juniper]

ok i will try once

[latent heart]

As long as your character is spawned on the server

(it probably is)

[twin juniper]

ya

[kindred gazelle]

How do I simulate a bad connection in editor again? I very vividly remember an option to simulate a 300ms connection but I can't remember where this is. Anyone know?

[marble gazelle]

next to the play button there should be a dropdown and something to open some settings for multiplayer, there you should be able to set them

[fathom aspen]

You can also do that using console commands: https://ikrima.dev/ue4guide/networking/debugging-tips-tricks/

[crisp wraith]

Hmm, how would you go about doing a lootable item, that has it's own state for each player but is still managed by the server?
Let's say, I have a pickable actor that gives 1 herb and I want each player and any late joiners, to be able to pick it up once, regardless if other player already picked it. If player picks it up, it is destroyed/invisible for that player, but others still have their state.

Thought about two options:

1. One server instance for each player, player is owner of that instance, instance has only owner can see. Meh, because we have multiple instances on the server for each player, you have to manage them for late joiners
2. Just add a map to that pickable with data who picked it up and how many he has left, if 0, hide it locally and prevent server and client side interaction requests.

[marble gazelle]

I have such a system in place. My current implementation is to have a "unlock" per such an pickable item and check if the player can unlock it again or not. (To reduce the amount of keys for this, I allow to unlock it based on Flags. so I can use 32 pickable positions perk Unlock)

What I want to do: Have a Max amount per Pickup the player can pickup, then on the server just store per player if an pickup was picked. as soon as the max amount is reached, all other pickups can't be looted by this player until the reset. But here I need to think about some more details.

You also could just delete the object only on the client and still have it in place on the server \o/

[weak copper]

EOS NOT WORKING ON ANDROID.
I enabled the plugin,added my IDs,edited the engine.ini with what is given in website.Should i add more code to engine.ini for support for mobile/Android?!
Iam making a multiplayer game.
USING UE5

[blissful saffron]

Is the plugin working for 5?

[gritty pelican]

Need help with NetСullDistanceSquared. If I use Pawn, NetСullDistanceSquared does not work on other pawns. Why?

[solar stirrup]

What's the issue exactly?

[gritty pelican]

When the client approaches the distance at which Pawn replication should start, it does not work

For example. I control Pawn and approach another Pawn, but NetCullDistanceSquared does not work

@solar stirrup

[solar stirrup]

Does it never get culled?

[gritty pelican]

yes

Only if Pawn is initially in this distance

But if he is beyond this distance, then it does not work

[livid mist]

Quick question... I've been advised that doing custom movement replication via blueprints instead of C++ is not the correct way to do it. Is it gonna be a huge problem to do it in Blueprints though?

[ocean geyser]

question. lets say i have 4 arrays of components that are replicated. to reduce the server load checking to see if theses arrays have changed and replicating them, would it be faster if i threw them all into a single struct and overrode whichever operator (im assuming ==?) that the server uses to compare the data to see if a property has changed? in my head this makes sense assuming it checks structs in the way i think. one comparison to see if a struct has changed and just replicate it if it has changed (its only to the owner, does not change super often, and they are fairly small arrays of just a few elements so its not a big deal to replicate all at once). i assume this would be better than to check each array to see if they have changed and replicate whichever array has changed. any idea how UE handles struct replication? does it replicate each marked member in the struct individually or does it do the entire struct?

[ocean geyser]

yes, i made a video directly on this which shows the result of doing it through blueprint (sprinting example). let me find it

[livid mist]

Oh no 😭

[ocean geyser]

idk why the videos are so dark when recording UE5 but its visible. dont worry its a full tutorial series to on how to do it with the movement component so you can follow along and try to atleast get the base of it setup so its easy to add things later.
https://www.youtube.com/watch?v=ixNGvOYkbno&list=PLnHeglBaPYu9YIxrnIEYuiEQArGW3_upu&ab_channel=SneakyKittyGameDev

[livid mist]

Thank you!

Is it easy to adapt the code to other types of movement? I will have sprinting, but I'm also going to have flight as well

[ocean geyser]

if your having flight i think you can just change movement modes no?

[livid mist]

Yea, I'm using the flight movement mode, but it has some custom code that happens when it's on so that it propels you forward

Is that enough for it to replicate ok?

I'm gonna also need controls like pitching and rolling

[ocean geyser]

ah gotcha. so things like that you will want to add into the character movement component. there is also the general movement component on the marketplace which allows you to do and add all this functionality in blueprint as well. its a bit expensive but looks pretty good (havent bought it myself yet)

[livid mist]

But to actually edit the movement component, you need do it with C++ right?

I have some blueprints that add velocity depending on your pitch and stuff like that

[ocean geyser]

correct, not with the general movement component though, id checkout his videos and see if its worth it for you
https://www.unrealengine.com/marketplace/en-US/product/general-movement-component

[livid mist]

It happens on tick if a flight boolean is turned on, probably not ideal but not sure how else to make it

oof that is pricey

[ocean geyser]

si. hopefully in the future epic will overhaul the movement component but who knows if or when but it beats rolling your own system

[livid mist]

I mean I guess I'll try to manage with what I've made, and if it doesn't work well then I'll just make my game singleplayer, I guess 🤷‍♀️

When I do client testing it works great, but I also have no ping difference between the two players since they're both me... No idea how it's gonna actually work in practice.

[ocean geyser]

so what you can do is play with PktLag. so doing

NetEmulation.PktLag 300

will give you roughly 300ms of ping but still no packet loss or anything, it should give you a rough idea on how it works. look through the NetEmulation commands and try to setup a real world setup

[livid mist]

ty, I'll try it

Uhhhhh

That's weird... When I set one of the players to 300 ping, the other player disappears as soon as I tab into their window

[ocean geyser]

odd. try loading it up like normal, then once everyones in set it to 300 ping

[livid mist]

now when I play it's just a black screen. wtf

https://gyazo.com/d39a1e502ec9fa9c1186aef1d63b8910

[ocean geyser]

thats very odd

[livid mist]

If I play the game, do netemulation off, then close and restart, it works again

yea if I do anything with netemulation the other player just disappears

is there anything here that needs to be enabled?

[ocean geyser]

nope, could just have a weird bug going on

[livid mist]

Something with Unreal, or something I did?

[ocean geyser]

couldnt tell ya

[livid mist]

damn

I'll try it with a blank template project

hmmm. When I do it in the thirdperson template, the players can still see each other, but they can't see each other moving anymore when I set the ping to 300

got the black screen issue again

omg I was using the wrong command.. 🤦‍♂️

I was doing packet loss instead of packet lag. lemme go try it again

[ocean geyser]

that would explain alot lol

[livid mist]

hmmmm interesting. When I set the ping high, the player I play as jitters all over the place, but the other player can see them perfectly smooth.

What is the cause of this?

They both have 150 ping

If I try either one, they both jitter super bad but look smooth on each other's screens

[ocean geyser]

so thats roughly what would be the result if you tested this in the real world. look at the first video of the playlist i sent, you will see me showing it with it done through blueprint and the result is the same. thats the server trying to correct it which is basically teleporting you back into place

[livid mist]

Aww 😢

But even walking is jittering. That has built-in replication doesn't it?

[ocean geyser]

as long as the movement speeds are the same yes

[livid mist]

They should be

There is no sprinting, just default walking. And it's jittering

[ocean geyser]

that should be pretty smooth. this is with the character movement component right?

[livid mist]

Yeah

It's basically a modified third person template character

I do have a variable on walking, I guess I can remove it and see if its fixed

Nope

[grizzled stirrup]

When calling UGameplayStatics::PlayWorldCameraShake in a PIE listen server session clients also play the camera shake even though it states that it is not replicated

Is this to be expected in PIE since it's running on the same instance and wouldn't happen in a standalone game?

Hmmm even though the comment says "Not Replicated"

Wow yeah looking through the code it does seem to iterate over all players haha

And call client RPCs

Why the "Not Replicated" comment 😄 Was wondering where these ghost shakes were coming from

[blazing spruce]

Hi, is there a specific class that I should have my session code in for hosting, updating, joining sessions?

[fathom aspen]

I did that once in a course, and it was in the GameInstance. I'm not sure if it's the best place though. #online-subsystems may have a better idea

Probably, https://gist.github.com/sinbad/b5f2c24037e626c2b8c78147ffdf6af7

If you want to just be able to call it though, BlueprintCallable is sufficient

[obsidian gyro]

I have this actor that spawns a weapon randomly from an array every 25 seconds. It works a few times, but then it randomly stops spawning them.

this is how I do the timer for spawning them every 25 seconds

and this is to spawn the weapon.

Any Ideas?

wait nvm I found the problem

sometimes the problem is right in front of your eyes

sorry

[dusky yoke]

Hey guys, Im working on setting up RenderTargets for my scopes. They seem to be replicating eachother's RT's (host sees client's RT, and vice versa) - apparently adding this code (see YT picture) to the scope itself should resolve that, but Im not sure how to convert this to BP, and my check seems to return false:

[ember dagger]

Im trying to set up a footstep system and for the most part it functions as necessary, but when i play it on a listen server with 2 people, the distance moved variable increase at a slower rate than when i have it playing with a single player. How would I go about fixing this?

[fathom aspen]

PlayerController owns the Character not the other way around

Your cast should be returning null there

[fathom aspen]

Second image needs a microscope

https://tenor.com/view/ken-jeong-cant-see-too-little-ben-chang-community-gif-5881468

Try using this instead: https://blueprintue.com/

[dark edge]

You don't replicate a render target. Every machine is rendering to the RT locally, you're replicating the command to do that or whatever.

[dark edge]

Shouldn't a footstep be an animation notify?

[dusky yoke]

Well yeah, initially that's what I was hoping for - having the owning client view his own RT, but yeah, that's not the case with my setup atm. The components (f.x scope) are replicated, so I guess thats why the render targets think they're supposed to replicate

[dusky yoke]

Hehe oh yeah, thanks for pointing that out! 🙂 I was trying to break through the wall and I just posted whatever I had up and running for testing 😅

[dark edge]

Don't get player 0

What are you trying to do, just do a scoped view?

[dusky yoke]

Yup

[dark edge]

In the scope
Begin Play or OnAttach -> Check if attach parent actor is locally controlled (You don't wanna render other ppls scope view if you like framerate) -> enable scene capture

So on every machine, the only scope that is actually capturing the scene is the one that is held by the local player's pawn

[dusky yoke]

Oh, I was doing it in the gun itself, I guess doing it in the actual scope is better yeah. Struggling to get a true cast on the Local Controlled check though 🤔

[dark edge]

Show what you have

Although you should just set owner on the gun on spawn / pickup so the gun can just check if self is locally controlled

er yeah is locally controlled is a pawn property so just crawl up the attach heirarchy (or do the setting from the pawn -> gun, my preferred method) setting some variable to let the gun know it's held by a locally controlled pawn

[lost inlet]

necroing this a bit, but why would would Punch() be a BlueprintNative event? where are the BlueprintImplementableEvents called from? why does the BP need to care about client/server through separate function calls?

since I imagine the BP will be mostly just playing cosmetic effects, unless that is not the case

but I feel that's overexposing a single thing to BP

[sand smelt]

is OnRep sort of slow or is the update to PlayerState kinda slow? I have a OnRep in player state that set a the material for a pawn's skeletal mesh but i noticed a small delay on clients

all blueprints if that matters

[fathom aspen]

#multiplayer message

[sand smelt]

ty

[dusky yoke]

Hey man, thanks again! I've already had the reference to my player setup in the scope's parent (gun components actor), but the cast is failing for some reason. Anyhow, here's what I have at this moment:

*updated

[dark edge]

It's usually a good idea to flow references one way when possible. There's no reason for the scope to even know a character is a thing. Just have the character or gun tell the scope to turn on when equipped.

[dusky yoke]

Hmm, I'll rearrange the referencing! 🙂

Working on an alternative way of respawning my characters upon death now, so instead of destroying them and their weapon BP's I'll just simulate their physics, spawn a spectator pawn & reset all of the players values as they're teleported to a random playerstart. Can I use Event Posessed for resetting the values? It says its mainly meant to be used for Standalone

[primal relic]

Hey guys, does anywhere know a good place to look for game economists/strategists?

Whether it be discords, forums youtube etc?

[chilly nymph]

im making a multiplayer game and i forgot how to give each player its own health can anyone help?

[dark edge]

Add a health variable or health component to their pawn class

But if you're that new, don't start with multiplayer.

[chilly nymph]

no i have decent experience with how it all works i just forgot how to do it (i did this a while ago and im touching up on it)

[latent heart]

Even so, don't start with MP if you don't know how to do that!

[chilly nymph]

i knew how to do it but its been a while and it was having some issue when i was doing it again (this time in UE5) so i just wanted make sure there was not a new way of doing it

[latent heart]

If you insist.

[chilly nymph]

yes i know i be dumb i forgot how to the basics

[candid escarp]

Hey people! How would I realise a lobby - pick champion system like League of Legends and others when I use different maps for those? Saving the picks in the game instance would be my idea, but how would I know WHO picked WHAT? Thanks!

[latent heart]

Player states continue across map changes, I think. Or you can make them do taht.

Link player state to character choice.

[candid escarp]

Seamless traveI think?

I*

[candid escarp]

Thank you that's what I needed!

[latent heart]

Yeah. I'm sure there was a list of actors you could supply to bring across.

[candid escarp]

so I can look for if player state equals player state of choice or a variable of player state like player state get player name?

Thank you very much this helps a lot

[latent heart]

No worries. Good luck.

[candid escarp]

Thanks!

[fathom aspen]

Yes. Still info of PlayerState won't be copied over to the new one, and for that you need to override APlayerState::CopyProperties

[fierce fiber]

For some reason, my Switch on Int isnt working, and I think it has something to do with the way Im casting to the bp_player, as Im trying to grab the specific player

[fathom aspen]

Is this a split-screen game?

[fierce fiber]

There is one camera focusing on all players

[fathom aspen]

I don't think we understand each other

Is this a multiplayer game with different players eg. multiple player controllers?

[fierce fiber]

Yeah

4 player local multiplayer, one shared camera

[fathom aspen]

Ah so it's split-screen

[fierce fiber]

Yeah haha, my brain is frizzled so I just completely miss read sentences for a second haha

[fathom aspen]

Local multiplayer = Split-Screen

[fierce fiber]

Yeah its split screen

[fathom aspen]

I haven't done local multiplayer myself, but I guess you can't do GetGameMode on client, you must be on server

So that Timer event there if it's firing on client...

Also I'm not sure what you mean by it's not working

Is it executing?

[fierce fiber]

Alrighty Ill explain what happens

So the cast is working, it doesn't fail, it plays the anim montage, but then, when it tries to fire the switch int node, it goes straight for the default output instead of targeting the designated variable that is assigned to each player

[fathom aspen]

Ok what's Class Number value before that?

Debug your code and watch the value

Or print it out

Also where do you call this Timer event from?

[fierce fiber]

So, when the player chooses a class, the class number var is called into the player, and assigns a class number to that specific player, this variable has been tested and it fires perfectly fine for each local controller, but for some reason, when called into this switch int node, it doesnt want to fire to the specific number, also this timer event is in the enemy blueprint

[fathom aspen]

I wouldn't save such a property on the player character class

PlayerState is where it should be

this timer event is in the enemy blueprint
Where do you call it from though?

[fierce fiber]

Event tick

[fathom aspen]

You are doing this the wrong way

If you want a time delay, use the Delay node instead

Also event Tick fires for both clients and server for online multiplayer, but I'm not sure how things work in local multiplayer. Anyways I would suggest you to debug and see how things are flowing

[fierce fiber]

Alrighty, cheers man!

[urban summit]

could someone help me with voip? i cant get it so you dont hear yourself while hearing others

[blazing spruce]

Thats exactly where i have my code at the moment so maybe that's the best place, thanks!

[candid escarp]

That was missing, now it works thank you :)

[blazing spruce]

Hi, I'm setting up some filters for finding sessions (using advanced sessions), I've got a filter for LAN, Showing empty servers only and hiding full servers, I need to make it find sessions when the box gets ticked but i also need to make it so that if for example the player ticks the 'Use LAN' box and then also ticks the 'show only empty servers' box that it finds sessions based on both filters, I've got it set up like this at the moment, is their a better way to do this? this ones just on the LAN check but the way ive got it setup now it'll have to be repeated for both the other check boxes too

[sinful tree]

Probably put the booleans directly into the find sessions node?

Should only need 1 branch if you do; the first one where the false plugs into the find sessions where everything is unchecked, and on the true path you have find sessions with "LAN" set to true, and the other two boolean parameters have the appropriate booleans plugged in.

[blazing spruce]

So like this?

[sinful tree]

Much better

[blazing spruce]

Thanks! so i would then just need to repeat this for OnCheckStateChanged on both of the other 2 tick boxes? but with the relevant one ticked ofc

[crisp wraith]

Thanks, you gave me some ideas to check out at work next week 🙂

[fierce fiber]

How would I set a variable in the thirdpersoncharacter blueprint to communicate to all controllers?

This is for a split screen game

[supple vapor]

hey guys, I'm trying to use the network profiler (dedicated server launched with networkprofiler=true) but I just see the frames and not the server connection

[eternal canyon]

its perfectly fine to get corrections

u actually want them

tho def depends on the type of game

[dusky yoke]

Does anyone have any tips on how to resolve this? Im making a system to respawn my dead player without destroying him or his gun parts. Instead I'll be spawning the player as a spectator for a couple seconds before the character is relocated and the spectator is returned to possess the character. Here's what I have so far (teleporting & spawning spectator code in pastebin, spectator in picture) - spawning spectator and possessing it works fine, but relocating the actor and reposessing is not working:

https://blueprintue.com/blueprint/2lo2kfa2/

[tender acorn]

hi all!

Is there any information topics where i can read about replicating animation blueprint?

i`ve noticed that sprint animations executing with a different speed, maybe someone of you has a ideas why this is happening?

[vocal quail]

Good evening. What is the common practice for "replicating" decals? From what I have googled is that it can be done by spawning decal on client side on all players.. Anyone else have any pointers on this?

[bitter oriole]

You'd replicate the logic that spawned the decal

[bitter oriole]

Same thing - you can't. Replicate the state of whatever drives that animation

[vocal quail]

Doesnt work. Tried multicasting spawn decal but no go

[bitter oriole]

Not just the spawn, the entire thing

Though a server-issued multicast would work fine

[vocal quail]

cant get it to replicate from client to server with server issued multicast for some reason.. Though, not the whole thing. Linetracing locally, passed vector to server, server, server call multicast

[bitter oriole]

"from client to server" isn't possible with multicast

Like you said, has to be client to server then mutlicast

[fathom aspen]

PossessPlayerAgain is a server RPC so it's called from the client, but you aren't the client when calling it, because you've done a possess there which worked, so you was the server

So just make it a normal event

[dusky yoke]

Oh, so from the Server-run event I can run a completely normal event?

@pallid portal (oops, wrong ping, mb)

RunOnOwningClient maybe?

[fathom aspen]

Yes

[fathom aspen]

Wrong wizard

[spare wharf]

Hello everyone, anybody can help me to put my characters in a replicated selection in my EOS Multiplayer game? Is there anything plug in or tutorial video explaining this subject well?

[fathom aspen]

You can't possess on client. Possession is server only

[polar solstice]

@spare wharf what is eos

[pallid mesa]

epic online services

a quick Google will help you understand the features it provides

we actually have a channel here for eos related questions #epic-online-services

[spare wharf]

Epic Online System

[knotty mason]

hey everybody, i have replicated variable bDashed that is being set to true in _Implementation function, and non-networked function that sets bDashed to false if it was true --- but they are looking at different points of memory, and even more --- it works for the first time after spawning player, but for the second time it doesn't work (even though addresses remain the same), for the first time function that sets to false checks bDashed and finds out that its true, but after that check doesn't work, it doesn't figure out that bDashed is true;
what is going on, how can i fix it?
i ofc can provide more information about the situation if its needed

[deft umbra]

stupid question, im kinda new to online networking, and i’ve understood most everything i’ve been reading and watching online, but what is the difference between a normal event and one marked reliable?

[peak sentinel]

Reliable sent until engine verifies it reached to other side

Other one can be ignored

[deft umbra]

so, i make an event reliable when i want to be certain the information will be sent through?

[peak sentinel]

Yes

[deft umbra]

alright, that makes a lot more sense, thank you!!

[peak sentinel]

There are conditions when engine is unable to send a packet because either frame rate tanked or network bandwith flooded, in those cases reliable RPCs queued in a container and sent when available

[deft umbra]

in that case, non-reliable events would just be dropped?

[graceful flame]

From what I've read reliable should only be used for special occasions where the game MUST have that RPC work to avoid ending up with a scenario where the gameplay breaks. For example the end of match scoring or assigning a player to a team, that sort of thing.

RPCs where players can potentially spam inputs don't need to be reliable imo

[peak sentinel]

Yeah engine can completely ignore them

[graceful flame]

But really it depends on your game

[peak sentinel]

Cosmetic things should be unreliable like FX, audio etc.

Things called on tick also should be unrealiable

For example even movement code calls unreliable RPCs (because it updates location in tick), but then it does some workarounds to cover that dropped packets

That's why networking is a big hassle, whole game runs around infos and datas and you always try to send less to the other side

There is also a CPU overhead to send/receive RPCs

A bigger problem than bandwith

[graceful flame]

I recently discovered bitwise operators. They are totally worth looking into btw.

Essentially if you can compress more data into a single packet the "netcode" will perform better.

The length of a RPC function name is part of its overhead, right? I'm probably going to make extra custom events that have really short names just to handle the actual server to multicast part.

[peak sentinel]

Ehh no, I dont think RPCs are sent by literal names

[graceful flame]

ahh okay so the blueprint RPC function name gets minified or something?

[peak sentinel]

Not minified, they have their own data structures probably behind the scenes

Name completely irrelevant

So MyAwesomeCoolFunction() and A() has same overhead

[deft umbra]

okay, another stupid question in the ring, if i wanted to use steam networking, would i have to do anything special to package just for development purposes? like just if i wanted to test steam online systems with friends and whatever?

[graceful flame]

I come from a web dev background, so minified is just a term I like to use 🙂

[fathom aspen]

You have to know how the SOS works

[fathom aspen]

^ Also order is kept

[peak sentinel]

Btw another cool things, BP function names are cosmetic only

iirc they have a generated mangled name behind the scenes

Name only relevant when you want to use FindFunction() thing and its to find UFunctions in a TMap

[deft umbra]

i understand sos means steam online subsystem, and it is used to tie online multiplayer into steam services, things like steam usernames and hosting, etc. if that’s what you mean

[graceful flame]

Glad to hear that, I was about to make a spreadsheet with all my function names mapped to single letters LOL

[fathom aspen]

I don't remember all the things you have to do by hand, but one thing I do remember, is you have to specify AppID (I guess it's called) to equal 480 in one of the .ini files

That's the one used for testing

[deft umbra]

so i shouldn’t have to pay the $100 steam fee to publish there just to test?

[graceful flame]

The $100 fee lets you publish, its the only way to get a valid app id. You can use the testing one but I think it has some limitations, like maybe games won't appear on the browser list via internet, but will work over LAN that sort of thing.

[fathom aspen]

I guess you would still have limit on the number of total players able to test(I could be wrong)

[fathom aspen]

Yeah also this probably

You have to contact them, or look into their EULA idk

[deft umbra]

alrighty, and if i don’t connect to steam, i could run through LAN and use port forwarding just for simplicity’s sake?

[peak sentinel]

Another cool info is if you see a non-developer friend playing a game with appid 480 that means they pirating a game 😛

[graceful flame]

I'm using the testing AppID and the steam subsystem, it get the little steam notification when I run in standalone and I have access to my own steam id while playing.

[fathom aspen]

Lol good to know

[fathom aspen]

I don't think you need to do any port-forwarding

[spare wharf]

thanks Vori 👍🏼

[deft umbra]

if i wanted to play with people outside my network i thought it was necessary

[fathom aspen]

As I know port 7777 is what unreal listens to, and you have to make sure that port is open iirc(which it is by default)

[deft umbra]

good to know, thank you so much for dealing with my stupidity

[graceful flame]

I wonder if AppID 480 lets you connect to a listen server IP address directly? 🤔

[fathom aspen]

Probably this might help you find more answers to your questions: https://partner.steamgames.com/doc/sdk

I'm pretty sure there is an example game for steamworks that shows what it's capable of doing

This one: https://partner.steamgames.com/doc/sdk/api/example

[deft umbra]

can i still access steamworks data if im using blueprints? or is it C++ only?

all i really need for now is usernames, and possibly access to the marketplace system further down the line when i have my own app id

[fathom aspen]

C++ afaik, but if you want to use them in BP, you implement them in a function library and expose that to BP

[deft umbra]

gotcha, i think im starting to get the hang of all this, is EOS pretty similar to SOS on a programming front?

[fathom aspen]

I haven't looked into EOS before so I can't tell, but I would guess they have similarities

Also for your notice the channel for all this kind of stuff is #online-subsystems

[deft umbra]

my apologies, ill be sure to take note for the future, i think i have enough for now though, i greatly appreciate your wisdom sir

[clever needle]

Some way to repair SAV files?

My servers at the time of loadingGame, do not appear in the list for players

[fossil veldt]

I still think I've only ever used bitwise 3 times ever in the whole time I was programming

and that was only because it was actually required

otherwise I feel like it just makes code less maintainable

[nova wasp]

can't you just : 1 bools and they get packed in ue?

I forget

[near bison]

guys

Can I really not use dictionaries/maps in unreal blueprints for multiplayer? :/

[kindred widget]

You can use them. They just don't replicate or get sent through RPCs. If you need one, make one out of a struct. It requires very little framework.

[near bison]

"If you need one, make one out of a struct. It requires very little framework."
Could you elaborate?
How would i have a key in a struct for O(1) lookup?

[kindred widget]

Was in an Overwatch game.

USTRUCT()
struct FMyDataStruct
{
    GENERATED_BODY()

    UPROPERTY()
    FVector SomeDataValue;
    
};

USTRUCT()
struct FMyReplicatedData
{
    GENERATED_BODY()

    UPROPERTY()
    int32 Key = -1;
    
    UPROPERTY()
    FMyDataStruct EntryData;
};```

UPROPERTY()
TMap<int32, FMyDataStruct> MyLookupMap;

UPROPERTY(ReplicatedUsing=OnRep_ReplicatedArray)
TArray<FMyReplicatedData> ReplicatedArray;

UFUNCTION()
void OnRep_ReplicatedArray();```

{
    MyLookupMap.Empty();
    
    for (const FMyReplicatedData& Elem : ReplicatedArray)
    {
        MyLookupMap.Add(Elem.Key, Elem.EntryData);
    }
}```

[twin juniper]

Hello guys.I am getting a crash when use a replication graph.

The error is as follows

No classinfo for weapon
Where weapon is a custom class

[summer tide]

Hi - Any1 knows how to fix replication issue on client-side when the character slides during movement using curve.

[near bison]

What...looks like an awful lot of code for something I just want to do in Blueprints

[kindred widget]

You're worried about lookup time in BP?

[near bison]

No, I'm worried about having to write C++ for a simple replicated map.... @kindred widget

[kindred widget]

You can do everything I just did in BP as well.

[near bison]

struct inside a struct, erm,...

[twin juniper]

Don’t see any problems with that. Games like Fortnite even have some struct that has a struct inside and that struct ALSO HAVE A STRUCT !!

Things like FQuickbar that has array of FQuickbarSlot etc etc

[near bison]

there's no problem with that, except this is ultra ocmplicated for a simple replicated map

and I still haven't been shown in that example how to access something in O(1) time

[kindred widget]

You replicate the array of structs. You construct a TMap out of that replicated data, and the client can access the map.

[near bison]

that's unnecessary extra steps for something that should be incredibly simple

and the fact that the reconstruction of the map is going to happen every single time the array changes.
what if I'm checking something inside the map on Tick on my local client?

opens up to a 100 problems

[dusky yoke]

Forgot to reply to you, just wanted to say I got the respawning & spectating to work, thanks a lot 🙏

[dusky yoke]

So I tried to setup the code so that it is the gun itself that activates the scope's RT (will add a enable/disable function later to save performance, which triggers when aiming as the RT is pretty expensive :o), but Im getting a FailedCast on my 8X scope actor cast. I feel like I'm missing something very obvious here 😅
https://blueprintue.com/blueprint/ngwhffs9/

Oh, nevermind, found another solution to it 🙂 This works magnificently if anyone's doing multiplayer scopes: https://forums.unrealengine.com/t/scenecapture-2d-in-multiplayer-sniper-scope/374281/8

[kindred widget]

Not sure why they would need to, but the client checking it on tick doesn't change anything regardless of how you replicate the data. As far as that code is concerned you have a map and it's checking it on tick. The networked TArray has zero implications on that. I've never personally needed a replicated map. By the time you get to an array size that would require Map's fast lookup speed, you're going to run into data size problems with replication or RPCing anyhow which will lead you into FastArray territory. Iterating over an array of structs is fast in C++. Networking code can be very tedious. It is never as straight forward as gameplay code.

[clever needle]

Does anyone know how to increase dedicated server timeout, it's at 15 to 20 seconds by default, in steam season dedicated server

[finite bane]

Would anybody know why a dedicated server would appear in the steam server list but not for clients?

[near bison]

as long as iterating over an array of structs in blueprints is not slow, i'm ok with arrays for now

Can someone tell me what's the best class to store player color in for a game? PlayerState I assume?

[fathom aspen]

Yes, considering this is a player related info

[near bison]

any suggestion on what to use as a data type? looking for some convenient built in ue type

[fathom aspen]

FLinearColor

[latent heart]

FColor stores them as 8bit ints. FLinearColor as floats.

[near bison]

So, FColor is 32*3

and FLinearColor is 8*3

[near bison]

I think I'm going to use FColor instead

[latent heart]

What

FColor is 8*4 (don't forget alpha)

FLinearColor is 32*4

[solar stirrup]

Hey! Quick question about replicated UObjects in UE5, I remember hearing about the fact that UE5 handles them by itself now?

Don't remember where I saw that so I wanted to make sure I wasn't dreaming hah

https://github.com/EpicGames/UnrealEngine/commit/8acc444feae7871f571781306b8c3d9e0bc8f3f0 nvm found it, just a new way to do it

[near bison]

yeah but what's the difference? wouldn't i always want to opt for the one that stores lesser bytes?

[latent heart]

It really makes little difference.

[faint eagle]

Why can it be that in a component an array of actors is full of nullptrs on its OnRep_ArrayChanged? I fill it only on authority at component's begin play but on clients the array is empty in the RepNotify function

actors themselves are replicated (SetReplicates(true) in ctor)

[clever needle]

[2022.04.10-19.40.34:777][ 0]LogBlueprintUserMessages: [BP_SaveSystem_3] Loading Save...
[2022.04.10-19.40.41:180][ 0]LogBlueprintUserMessages: [BP_SaveSystem_3] Saved Loaded
[2022.04.10-19.40.41:186][ 0]LogLoad: Took 45.550594 seconds to LoadMap(/Game/Maps/KAOS)
[2022.04.10-19.40.41:187][ 0]LogPakFile: AllPaks IndexSizes: DirectoryHashSize=1310068, PathHashSize=16, EntriesSize=217088, TotalSize=1527172
[2022.04.10-19.40.41:187][ 0]LogInit: Display: Engine is initialized. Leaving FEngineLoop::Init()
[2022.04.10-19.40.41:187][ 0]LogLoad: (Engine Initialization) Total time: 49.80 seconds
[2022.04.10-19.40.41:227][ 0]LogNet: UNetDriver::TickDispatch: Very long time between ticks. DeltaTime: 0.03, Realtime: 35.72. SteamNetDriver_2147482470
[2022.04.10-19.40.41:828][ 2]LogOnline: Warning: OSS: Async task 'FOnlineAsyncTaskSteamCreateServer bWasSuccessful: 0' failed in 33.877804 seconds Any solution??

[faint eagle]

ok I guess I have another question now. Is it guaranteed that an actor's property is replicated only at the end of a tick? I mean is it possible that I have default net update frequency == 100 and in some actor at beginplay i'm doing something slow, like spawning N items and putting them to a replicated array, and the array gets replicated in some background thread multiple times while the BeginPlay is still executing in the main thread?

[warm sequoia]

why isnt this replicating?

@twin juniper wdym?

[gleaming vector]

thats a bad way to answer that question

he's doing an rpc

which counts as replication

[dark edge]

Put print strings on all 3 steps and see where it fails

[gleaming vector]

are you sure it's not replicating? you may be trying to run a montage on a slot that isn't set up in the anim bp

i've run into that before

[dark edge]

assuming that's a good montage to play and your anim BP can play it. start off by going input -> play montage to make sure the montage is not the problem

[warm sequoia]

@gleaming vector yeah it isn't... right now it the action isn't even playing when the inputaction calls to the action server

the montage works on the character, other player can't see

[gleaming vector]

oh so it's not calling the server rpc?

[warm sequoia]

It is, it just isn't replicating

[dark edge]

Put a print string on all 3 events, do all 3 fire?

[warm sequoia]

will see now

[gleaming vector]

also, it's worth noting, multicast RPCs are fragile as hell

[warm sequoia]

only the top line is printing adriel

[gleaming vector]

a better way to replicate this would make a bool variable replicated, and use a rep notify to play the montage

[dark edge]

Show what you have now

[shell sorrel]

In a " Multiplayer login > Be shown a custom-your-character-widget > Play" flow, is there a way to make UE not spawn at all the default pawn until the custom-character-widget is filled/submited by the user ? (at this time you will know his appearance and team that you didnt have at default spawn)

[dark edge]

You can do that with a custom Gamemode

That's what we do, you don't have a pawn until you pick one.

[shell sorrel]

Cool , any entry points to use I could search for ?

[dark edge]

I don't recall what we used but make a gamemode and look at the functions you can override

I think there's an event? you can implement to basically handle all spawning yourself

[shell sorrel]

Any idea what happens on the client's POV ? blackscreen ?

[gleaming vector]

a camera at 0,0,0

pointing in the Y+ direction i believe

[warm sequoia]

@gleaming vector wdym with the repnotify? I have a bool variable so what next?

[dark edge]

@warm sequoiaDude show what you have right now, with the print strings. It's really effin weird to not have a simple RPC setup not work.

[shell sorrel]

👍 thanks @gleaming vector @dark edge

[gleaming vector]

in the options for the variable, there is a drop down box for "Not Replicated, Replicated, RepNotify"

the last one will make a function that is called on clients when the variable changes

[warm sequoia]

@dark edge I didn't change anything, the same pic u saw above i just added print strings at the end and only the top line worked

[dark edge]

@shell sorrelWe have a custom PlayerCameraManager and drive it around, that's an option, depending on if camera components make sense for your game. They don't really for ours.

[warm sequoia]

I get that, but how would I write the code for that instead?

[gleaming vector]

basically, RPC to server, servers value to true

then in the repnotify function, if the value becomes true, play the montage

if it becomes false, stop it

[dark edge]

If you make a property RepNotify, you'll get a function Onrep_PropertyName that will fire every time that property changes. That's where you'd play the montage

[warm sequoia]

gotcha... ty

[dark edge]

When in doubt, use repnotify so things are stateful and not dependent on events which you may or may not get clientside

[gleaming vector]

I like to use APawn* SpawnDefaultPawnFor_Implementation(AController* NewPlayer, AActor* StartSpot) in GameMode to set pawns

and in PlayerController, virtual bool CanRestartPlayer() override; returns false if the player hasn't selected their pawn

once the player has set a valid pawn, I call RestartPlayer

which forces spawn flow

I have a 'Character Class' setup, and in each class they have a pawn

the UI sends an RPC to the server with the intended class

if that class is valid, I allow them to restart

[dark edge]

@warm sequoiaThe reason why you wanna use RepNotify instead of a multicast event is so it'll always respond to the state, not just the event. Meaning if you join a game and someone is in the middle of a slide, or if they slide and become relevent, you'll see them sliding instead of not (because you missed the event)

[gleaming vector]

I also do spawn point selection this way too

[dark edge]

On this topic, what would be a good way to show a main menu on startup/restart (roguelike game) without ANY hard loads?

[gleaming vector]

same deal, UI sends an intended spawn point. If that spawn point is valid, I store it in the player controller and use AActor* ChoosePlayerStart_Implementation(AController* Player) in the gamemode to put them there

[gleaming vector]

🤷🏽‍♂️

often, if you go to main menu, you want to leave the server

[dark edge]

But not show it on a join. I think we ended up storing a state variable (bHasACharacter or FMyCharacterStruct) but I can't recall. It felt hacky, that's for sure.

[gleaming vector]

if you want to just display a death UI, just pop it up in their face when they die

oh

i have a variable on my PC to track if they died

[dark edge]

We're going for absolutely minimal hard loads, I think the only one we can't avoid is at game startup and join/leave server.

[gleaming vector]

because there are a lot of cases in my game where a player can become disconnected from a pawn and not all of them are death

I personally use GAS

so it's just a gameplay effect

the effect holds their previous pawn if they've become disconnected for a gameplay reason

or says they've died if they did

if they dont have a pawn and dont have a gameplay effect saying why, it's assumed because they just joined and haven't spawned yet for the first time ever

[dark edge]

What's the gameplay reason for the disconnect, mind control?

[gleaming vector]

hopping to other pawns

I also wanna do a battlefield style effect where you can see over the whole battlefield

[dark edge]

So do you do ASC on pawn and playerstate?

[gleaming vector]

playerstate

Lyra solved so many issues for me

[dark edge]

How does that work with AI then?

[gleaming vector]

i dont have ai

or well, i do i just dont put it on the player state for them

[tawny nova]

will you try to keep in sync with Lyra as they develop it?

it seems like the best base template to start from anyhow

[deft umbra]

so i have a project with advanced sessions enabled and it's connected to steam, it works in the editor fine, but when i package it and run it, nothing happens and the game doesn't even appear in task manager

this is the log it produced

"LogPluginManager: Error: Unable to load plugin 'SteamShared'. Aborting." i think is the cause

[jovial dawn]

Hello , I have compile a private server, on standalone the client run at 60fps, but in network my character getting very slow

[dark edge]

What framerate is the server running at?

Do you mean dedicated server?

[jovial dawn]

on the console log it said that the tick max fps is 30

[dark edge]

Start with profiling the client. Are you running on seperate machines?

[jovial dawn]

but it's slow no, or if we get higher than that it may make other player lagging

I tried many case, on a private server or in local same thing

[dark edge]

Profile it

[jovial dawn]

if I run it standalone it's fast

[dark edge]

Is the actual framerate slow or is the character movement just screwed up?

[jovial dawn]

the fps is good, only the player that walk slowy when it suppost to run

[dark edge]

I'm guessing you're trying to sprint by just changing the walk speed?

[jovial dawn]

by defaul the character is always running

[dark edge]

So do you ever change max walk speed on the CMC or no?

[jovial dawn]

no never change the walk speed in cmc, it's always the same

so I decide to create a new plain map witout any mesh only the character it did the same thing, I tought it was my scene that doing this

but like I said fps is normal.. weird... well I will profiling

it's the network or something... else

[dark edge]

Start with making sure it works in listen server

Then in a launched server

THEN in a compiled standalone server

[jovial dawn]

ok

thank guys

will check this out

I also try to make it work with a WP map.... it don't work at all, streaming in network is not working.

it's work.... but with a lot of glitch, and the map is loaded completely...

I think I will split my map and put all parts in HLOD

and stream it myself

or put all part in a datalayers and hide all the map parts

[limber gyro]

Hey guys, im trying to change the HUD color of a client from a level BP, what would be the best way to achieve this in ur opinion?

[fathom aspen]

HUD color? what does that mean?

[limber gyro]

the color of something on a widget that is being used as hud

[fathom aspen]

It's a 2D widget right?

Meaning it's not a 3D widget component

[limber gyro]

yes

[fathom aspen]

Ok why are you doing this on the level BP?

Or more specifically what are you trying to do?

What's the event/thing that makes the color of that widget change?

[limber gyro]

The game has a sudden death when a certain time is reached, the sudden death is diferent per level, so idealy the logic is held by the level blueprint for simplicity sake

[fathom aspen]

That certain time is different for each player? Or is it shared among all players, so all players die when it's reached?

[limber gyro]

its shared, they dont die

for now i just want to change the color of the screens

the issue is that i cant use a replicated client function because the level is not the owner of the pawn

in this case actualy is the controller cause i got the hud in the controlller

idealy it would be something generic like a blueprintImplementableEvent

so that i can write further sudden death logic on diferent levels

[fathom aspen]

Ok if it's shared then I would have that functionality be implemented in the GameState instead. I would have that TimeLimit variable stored there, and when it's reached I would loop through the PlayerArray(It's an array of PlayerStates) and from each PlayerState I would get the PlayerController(via PlayerState->GetOwner()) and on the PlayerController I would call Client RPC that changes the color of the widget.

[limber gyro]

That is indeed possible but then i would have to write a new function for every diferent sudden death effect

because all sudden deaths dont look the same

[fathom aspen]

Nope

You would specify that sudden death effect there

using a parameter or something

What you was trying to do don't solve this either

[fathom aspen]

What I explained here simply tells all the clients to "die"

Now what "die" means, is up you to define and pass

[limber gyro]

i get what ur saying

i will probably do something similar

im just not 100% happy how im gonna have to do it

[fathom aspen]

Just break it down into pieces, and see how it goes. Speaking of how I would tell all clients in my game to "do something", I find this as a good practice

[wild patio]

can anyone think of a simple reason why my server player pawn can't "get owner"?

i mean, the reference is invalid

[fathom aspen]

I would guess because the pawn is client owned, so get owner on the server would return null

On the other hand if you try to get owner on the client you would get the player controller

[wild patio]

it looks like get owner returns an actor.

[fathom aspen]

Is your pawn possessed by a player controller?

[wild patio]

yeah.

[fathom aspen]

Ok what actor is returning?

[wild patio]

i'm guessing it's null from what you're saying, but let me check

[fathom aspen]

If you're on the doing it on client it shouldn't be null

[wild patio]

huh. it says display name is PlayerController on the client.

[fathom aspen]

^

[wild patio]

so if a pawn is possessed, it's owner is the controller. if not, the owner is itself?

[fathom aspen]

I'm not sure about what happens if it's not possessed, but clearly it's the not the controller

I would guess it would be server owned

Considering you would spawn it on the server...

[wild patio]

right. i'm looking at this code and now i'm thinking, how the hell did this work for weeks until another change i made

[fathom aspen]

Or you can try have a pawn that is possessed, then unpossess it and getowner and see what it returns

[wild patio]

i think i was initializing some stuff using the owner before it was possessed and it was working.

and then i re-wrote things to initialize things only after the pawn is possessed.

[fathom aspen]

Yes, only when pawn is possessed then is client owned by the controller

Looking through the source code, the pawn would have no owner when unpossessed

[wild patio]

got it. i have no idea how this code worked before, but it was getting a reference to a pawn at some point. strange.

well anyway, i should probably be doing this, then

[fathom aspen]

Yes

[wild patio]

uh oh

[fathom aspen]

Wait why you're doing this if you're already in pawn

This like using self

[wild patio]

child component needs a reference to the pawn

er, a non-scene component

[fathom aspen]

I don't think I understand you

[wild patio]

it's an actor component, added to my pawn.

[fathom aspen]

Then GetOwner directly

the owner of the actor component is the pawn they are attached to(part of)

[wild patio]

huh. that's what stopped working

[fathom aspen]

But here you are in a pawn class, not an actor component one

[wild patio]

this code is from inside the actor component, that is attached to the pawn

[fathom aspen]

Ok where are you doing this from? What event?

[wild patio]

on server and client i check if the pawn has a player controller. when it does, it runs an init, down the line the actor component is told to init.

in that actor component init is this code above

[stark tree]

Hi, is it possible to create a dedicated server and have 2 or more Oculus Quest devices connect to it, I want to make a multiplayer VR meeting type thing.

[wild patio]

definitely possible. but much more involved than what could be explained in this chat.

[stark tree]

thanks. I'm an intern and I'm asked to do it but they don't know if this solution will work. But they just want the results. I have tried so many different ways I am frustrated, now turning to dedicated server option.

[fathom aspen]

The cast is failing there?

[wild patio]

correct

[fathom aspen]

It might be failing for the server but not failing for the client

[wild patio]

right

[fathom aspen]

Considering init is run on both

[wild patio]

it's failing for the server

[fathom aspen]

Ok it makes sense

[wild patio]

yeah?

[fathom aspen]

Yes considering the pawn is a client owned actor

[fathom aspen]

^

[wild patio]

man, sometimes i think i understand something

so on server, get controller, get controlled pawn

the server creates the pawn. so the server has authority over the pawn. but then the player controller possesses the pawn, and the owner is the player controller, which the client owns.

[fathom aspen]

Correct

[wild patio]

man, this is useful to know

[fathom aspen]

You would still get valid references for those on server

Only GetOwner has this kind of issue

[wild patio]

got it. get owner just can't access the owner from the server when possessed by a client controller

would be awesome if that was in the docs or node description haha

[fathom aspen]

True, but Epic has other interests at the moment...

[wild patio]

hah right

really appreciate the help. you've definitely helped save my likely hours of life.

i think what i'm gonna do is write my own blueprint utility function that has more predictable results

[fathom aspen]

Well I don't see how this can be more predictable, but you can try it out

[stark tree]

The official Unreal documentation says to use a dedicated server my project must be a C++ project. That is ok, but what if I want to do development in blueprints for my game? For example I want to create a gun shooting. I will create a C++ project for server, but then how do I write all the player logic gun logic gameplay logic etc in blueprints? I barely know any C++

[fathom aspen]

If you create a C++ project you can still use BP

[stark tree]

Thanks!

[stark tree]

Would I be able to retain the blueprints that come with the template? I don't want to configure all VR controls, instead just use the VR Template

[fathom aspen]

I haven't used the VR template project in C++ so I can't tell

[stark tree]

What about third person project? Any template basically

[fathom aspen]

Haha I can't remember what happens there either, but I guess they move controls to C++

Simply test it out

Takes a few minutes to test

[stark tree]

Thanks a lot

[near bison]

I have a function that does a bunch of stuff and then calls an event
I have a listener for the event wired up in BeginPlay

Breakpoints show it takes me to the call, but the listener is not firing. Any thoughts?

[marble gazelle]

Hm you wired smth up wrong? 😄

You need to give more details 😉 As you ask in Multiplayer, should the event be sent over the network?

[near bison]

yes

but only for the owning client

let em show you @marble gazelle

[near bison]

Is PlayerController always initialized after PlayerState?

[marble gazelle]

I don't know, might want to look at the code^^

[faint eagle]

can client's RepNotify functions be called before client's BeginPlay? Is any order of replication guaranteed when a new client connects to a session? 🤔

[chrome bay]

They are almost always called before begin play

[near bison]

the answer is yes. I've never had an issue so far. that's why you can get playerstate in playercontroller i nthe first place

[chrome bay]

It's why BeginPlay is such a terrible place to initialize things

[near bison]

incidentally solves a lot of my problems too. Makes sense to initialize my UI in player controller (calling the HUD function of course) because I can be sure it's there

[thin stratus]

The PlayerController creates the PlayerState

If you access the PlayerState from the PlayerController after, let's say, post login and not at some early a** time on the client, it's probably valid

So no, the PC is not initialized after the PS :P

It's just that the PC creates the PS early enough for you to not worry (replication terms and conditions apply)

[sinful tree]

Always something in the fine print.

[faint eagle]

hmm ok. then what is a good place?

[bitter oriole]

If you're doing multiplayer the idea of a single-point of initialization is just not gonna be a thing

It's gonna be a mix of BeginPlay, replication events, and waiting for some conditions on tick

[faint eagle]

got it. thanks

[chrome bay]

There are some funcs called before replication stuff is applied like PostInitComponents etc.

BeginPlay is more of a gameplay-concept than an object-lifetime thing if that makes sense

[nova wasp]

https://docs.unrealengine.com/4.27/en-US/ProgrammingAndScripting/ProgrammingWithCPP/UnrealArchitecture/Actors/ActorLifecycle/

the sacred texts...

[worldly pivot]

on clients, there is not guarantee about the order

[near bison]

these are such meaningless abstractions then

there needs to be some guaranteed order of creation

[nova wasp]

you chose the wrong engine if you wanted guaranteed order

[near bison]

even if order is not guaranteed

I want events I can listen to in blueprints

so I can actually do something there instead of in BeginPlay

this is ridiculous

[chrome bay]

Unfortunately when it comes to BP, you're limited to what the engine decided to expose

[shell leaf]

My multiplayer game allows players to select a class in the lobby. When they select a class it is stored in their game instance. When the game starts the new game mode uses the OnPostLogin event to get the selected class of each player controller (by accessing it from their game instance). This works perfectly on the host but not on the clients. After placing about a million breakpoints I found that on the client, one of my blueprint nodes is being called late.
Because the GetCharacterClass event is being called late, my StartingNewPlayer event is being called with the incorrect character class (this event spawns the player).
As a result, the host spawns the the correct character but all of the clients spawn with the default character. Any help/advice would be greatly appreciated! Thanks 🙂
The first photo is the execution flow on the host(this works). The second photo is execution flow on the client (this does not work).

[chrome bay]

RPC's are latent

That's not going to work in MP

And more to the point you can't access a clients' game instance on the Server. The Client will need to join, tell the server what they selected, then the server will have to delay spawning them until it receives that call.

[marble gazelle]

You could use this:
https://docs.unrealengine.com/4.27/en-US/InteractiveExperiences/Networking/OnlineBeacons/
but then you need to map the players of course.

[candid escarp]

Still having weird problems after adding impulse to StaticMeshActor - Did someone else have this? I did the same in UE4 and it worked, currently using UE5 :( I really just call "AddImpulse", which seems to work, but like this. I am running as server

[candid escarp]

I asked this a few days ago and managed to implement it :)

Use your player state to store the chosen class in the lobby and call "Event CopyProperties" in it, use the chosen class as the given parameter and get your player state in the Event of spawning your player (I'm using Event Handle Starting New Player, forgot the pros and cons of that)

[candid escarp]

As I am quite new myself this could be bad practice, but it works so no guarantees on that XD

[dusky yoke]

Is the Steam App ID 480 (Spacewars) for testing Steam games region-blocked? Friends cant see my hosted server, but if they host (theyre in Netherlands), I can see their servers. Im confused. I've read that it seems buying your own Steam App ID gets you past this issue somewhat, but Im not sure the credibility of those statements

[thin stratus]

Pretty sure all listen servers are a region thing

Not sure if locked but it takes the country in the settings of steam into account

Your own app Id could help but for other reasons I believe

A lot of users use 480 for testing so you get a lot of session results from other games that are filtered locally by UE. So if you search for 10 sessions and all 10 are from another game, the one from your friend might not be visible

But that's just theory

@dusky yoke

[dusky yoke]

Ah okay, thanks for the response! Yeah, I dont see any other sessions than my own game, but I hope I'll get it fixed soon as I cant host sessions atm :p

[hardy crown]

hello anyone can help plz --- i did built dedicated sever and i can see it on my game and on steam - and i can join the game if i launched it on my pc (that has steam app installed) and also can join it from internet - so it works as indented ---- but when i lunched it on a real dedicated server after adding dlls files -and openning port 7777 and 27015 --- i can see the server session on steam server list and on game server list but as soon i join the server the game quit while loading level -- and i have this errors on the server log -

[2022.04.11-14.29.35:354][355]LogOnline: STEAM: Adding P2P connection information with user 76561199104191641 (Name: UNKNOWN [0x1100001442EEC99])
[2022.04.11-14.29.50:383][804]LogOnline: STEAM: Removing P2P Session Id: UNKNOWN [0x1100001442EEC99], Channel: -1, IdleTime: 15.027
[2022.04.11-14.29.51:905][849]LogOnline: STEAM: Closing all communications with user 76561199104191641
[2022.04.11-14.29.51:912][849]LogOnline: STEAM: 76561199104191641 has been removed.

and got this error on the client

[2022.04.11-15.35.26:251][590]LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = PendingConnectionFailure, ErrorString = Your connection to the host has been lost., Driver = PendingNetDriver SteamNetDriver_2147482416

full client log on attachments

i tried open:serverip:port and got this errors

[vocal quail]

Howcome my attached weaponpart in null on client side running on dedicated server? Spawned weapon and attachment the same way (on server) but the attachment referance is null on client side... Any magic tricks on this? Is a modular weapon setup

weapon referance works fine, but attachment doesnt

Well... Turns out I forgot to set the referance as replicated. LOL.

[wild patio]

does anyone know how to use Get Local Role and Get Remote Role in blueprints?

[dusky yoke]

So I've got footsteps setup in my game with attenuation, but an issue is that as the player your own footsteps kinda sounds like they're coming from behind you so it's hard to differentiate the sounds. Is it possible to play one sound on the player which is an un-attenuationed sound, whereas all other players (host/client) hear the attenuation-sound?

[wild patio]

it returns an ENetRole Enum. but that Enum doesn't exist anywhere in the editor.

[kindred widget]

You can't == or != them? Seems to work in UE5

[wild patio]

i tried doing a switch, and nothing

ohhh, == works, but switch doesn't. huh. any idea what a switch wouldn't work?

[kindred widget]

I would wager it's something to do with the enum == node. It can probably read non BlueprintType enums if something else exposes them like that function. But they probably aren't recognized by the switch generation code, not being BlueprintType.

[wild patio]

huh. interesting

so i have a situation where client1 character that connects to a server that already has a client2 character. because of a system external to the game, clients need to send their character configuration from client to the server using RPC. when client1 connects, client2 doesn't have it's configuration. from the perspective of client1, client2 is a simulated proxy. the configuration values are set to replicate, but they are blank to client1.

do simulated proxies, when spawned, not get spawned with the values already set?

[kindred widget]

This doesn't have anything to do with the net role. Not unless you've specified replication conditions. Chances are that where ever you're checking the other client's replicated state is too early before it's actually replicated.

[wild patio]

so my current setup is: server starts -> client1 connects -> client1 possesses character -> client 1 sets color (blue) locally -> client 1 sends color via RPC to server -> client 1 (server) turns blue. -> server multicasts config for client1 to other clients.
client2 connects -> client2 looks at client1, not blue. and i think because the RPC multicast ran before it connected.

color variable is set to replicate. on client2 i tried to check on tick until color is set from blank to blue. but it never changes.

[thick scroll]

If I set Pktlag to 500 in a default first person project, but still experience rubber banding when playing two client instances, is there any other setting I need to change for it to work a bit smoother?

[low helm]

I assume you’re using the character movement component

Start by seeing if you can turn off extrapolation

[hidden plinth]

I was wondering if anybody had best practices for using datatables with networking. I have a datatable of a deck of cards, and players have a hand of those cards. I was looking to replicate down just the identifier of the card since all clients will have the datatable vs replicating the entire structure. I read FNames generally aren't compressed...so that's not ideal, and I don't see a way to get an int ID of the row from a datatable. Appreciate any suggestions to my approach

[fringe dove]

What's the right way to kill a dedicated server process? Ctrl-C in a linux shell of it seems to segfault or otherwise cause bad exits sometimes

[latent heart]

type exit?

I forget if it reponded to console input!

[twin juniper]

if anyone is bored and would like to help me understand what I am doing...
I am using the bp without a loop in singleplayer and it's working
and I'm using the bp with a loop in a listen server and it's working but it feels hacky.
this is for a multiplayer game with a static camera position.

[latent heart]

What are you expecting that second image to do?

[fathom aspen]

DataTables can't replicate. They exist on both the server and clients.

[hidden plinth]

@fathom aspen right, perhaps i phrased that confusing. I'm looking for a way to replicate/inform the client of an identifier to a row in the table the client can look up. RowName is the obvious option, but the lack of compression for FNames made me wonder if there was a better approach (like an int primary key or something). In editor when editing a datatable, there is what appears to be one...but doesn't seem exposed

[latent heart]

You really don't have to worry about compression when it's a few hundred bytes at most.

Unless you have hundreds of cards with stupidly long names.