multiplayer

[shadow schooner]

eos uses the same fundamentals right?

[winged badger]

eos is a different beast

eos is a service providing stuff like matchmaking

the document is pre-eos and also covers ingame networking

which starts after eos has finished its job

[shadow schooner]

oh okk thnx

[rich ridge]

@shadow schooner EOS is your game OSS..
OSS contains code for mostly rest API for game backend. And there is hardly any need to replication and multiplayer networking.

[woeful sigil]

I'm trying to change the walk speed for the third person character by changing the "Max Walk Speed" variable in the character movement component, however whenever I do this on servers it ends up rubber banding as I'm pretty sure the server isn't having the variable changed and is resetting it back down for the clinet

I would imagine it has to be possible to replicate the sprint speed locally for each client and not have the server interfere with it, right?

[kindred widget]

@woeful sigil It has to be set on both client and server. You can pretty easily do this with an Enum or whatever. Just something like a Reliable RPC on shift down, input the enum for sprinting. Set it locally, and RPC to set it on the server to let it replicate to other clients. On shift up, same thing with a different input. On enum rep, change the movement speed.

Might also be a better way, but I ended up achieving okay results with that.

[woeful sigil]

That's a lot of things that I most definitely don't understand lmao I haven't been doing this for a long time

Whelp, looks like Google shall be my only companion for tonight

Thank you so much for your reply and I'll come back if I have any persisting issues

[kindred widget]

I can help in a few minutes. Are you doing blueprint of C++?

[woeful sigil]

Blueprint, I have absolutely zero in C++

Wait that's a lie

I have very little experience in C++

Not enough to be using it reliably

[kindred widget]

@woeful sigil Do you know how to create a ServerRPC event?

In the character, you can do this in the main graph. Once you set the bool to RepNotify, you'll get a function in your functions list to use.

In that function you can set your client's local character movement component up like this. This will also run on the server.

So based on whether that client has pressed shift or released it, their movement speed will be faster or not.

[woeful sigil]

OooOOoOoOOoOOoo

Okay give me a moment here

Uhhhmmmmmm okay that's not supposed to happen

Now my dedicated server is acting up

Okay well, if I play as a Listen Server it at least kind of works? The jogging animation doesn't play but the speed does actually change

It's still jittering about but it doesn't sling me back to where I start sprinting

[kindred widget]

You might need to change some settings for the corrections at higher speeds like that. Give it a wider correction range.

The animations will just be cosmetic in the animation blueprint based on the speed the character is moving.

[woeful sigil]

The animations do work, I know that they will whenever I play offline, it's just that when I'm online it doesn't seem to want to

And now my server is being incredibly strange

What the hell

Okay it is definitely what I've set up that's not letting me connect to my server

I took away all of the variables and code that I made and it worked

Put it all back and now it won't

This is so strange

[woeful sigil]

OH

Oh I'm so stupid

Nevermind me

@kindred widget Yeah, I've repackaged my server and still the speed change doesn't seem to want to work for me

Oh okay, actually

Now I have a completely different problem

Pressing shift immediately slings me back to the main menu

[kindred widget]

Haha, that's odd. To be fair I'm not used to working with dedicated servers so that might be something else I'm unaware of. Normally I stick with listenserver setups.

[twin vine]

I don't want to change DefaultPlatformService under DefaultEngine.ini for each platform I want to build the project for. Can I do something about it?

I want to write it for each platform once and be done with it. Can I achieve this?

[bitter oriole]

Don't multi-post questions in different channels

[twin vine]

I noticed that this is a better channel for that

[marsh gate]

how do you guys overcome that initial middle of the map camera view for 1 second on load because the player is waiting for server to replicate pawn to client?

It shows the middle of the map for 1 second at 0,0,0. This is before the pawn has spawned and when the player controller has spawned

it looks bad, it would be nice if I could change it to a different camera perspective

Its on dedicated server btw

here's how it looks like for that first second when the player is spawning in the map

[bitter oriole]

Loading screens

[chrome bay]

We put a camera into the map that has a certain desired viewpoint. The camera manager falls back to that viewpoint if the player has no pawn.

[marsh gate]

You're talking about the first few seconds before the player even starts? Can this be done in BP? I've tried to do this at begin play for the camera manager but I still see a half second glitch now.

It actually sort of works. It shows the middle of the map for half a second then shows the desired viewport for half a second and then finally switches to pawn, but that first middle of the map shows albeit for a shorter period of time.

[marsh gate]

This could work

[chrome bay]

Probably not in BP. It takes a while to receive your pawn, so until then, you'll just have a "default" camera view.

Looks like there is a BlueprintUpdateCamera function in Player Camera Manager, so you might be able to override it there

[meager fable]

Hey guys, I'm having trouble with my characters movement replication, I'm using the character movement component and moving my pawn via the AddMovementInput Node. The client lags like crazy and gets its movement corrected very often. My tick time is 5ms and my avg bandwith size per sec is 3KB on the listen server and 5KB on the client not sure if that is much but I only have one rpc in tick and its not reliable. What else could be causing lags in client movement?

[marsh gate]

Is this happening in PIE or in a packaged build?

[meager fable]

rmb-> launch game on .uproject

[gloomy tiger]

Hey there people!

Have you ever managed to "replicate" Steam Avatars over the network?

I don't want to replicate the Avatar itself, the Texture2D; Instead, I'm trying to replicate the SteamID with clients and from there retrieve the avatar on their own.

My problem is that I can't replicate the UniqueNetId, and am using Advanced Sessions FWIW.

[chrome bay]

you can get the replicated unique net id from the player state

There's a wrapped type that allows it to replicate

[gloomy tiger]

Hmm...

I guess I must expose it to Blueprints, right?

I guess it's this one

https://docs.unrealengine.com/en-US/API/Runtime/CoreUObject/UObject/FUniqueNetIdWrapper/UniqueNetId/index.html ?

[meager spade]

its GetUniqueId() on the playerstate

and its not available in BP

[gloomy tiger]

Hm...

Do you know if I'll face any trouble by exposing it to blueprints?

Am guessing that b/c it's not exposed by default so..

[meager spade]

should be fine

FUnieuqNetIDRepl is BlueprintType

[gloomy tiger]

Well...

public:
    UPROPERTY(BlueprintReadOnly)
    FUniqueNetIdRepl UniqueId;

🤔

Do you know from the top of your head what went wrong here?

[meager spade]

you cant do that

make a function

to return it

[gloomy tiger]

Doh

Well, I was expecting that but well, lol

[peak sentinel]

If you can break and make UniqueNetId on blueprints maybe that can work

instead of directly connecting

or split structure pin

[gloomy tiger]

It doesn't seem I can break it. 😦

[peak sentinel]

I guess splitting is not going to be an option too then

[gloomy tiger]

I could use some CPP here but well..

https://github.com/mordentral/AdvancedSessionsPlugin/blob/8d82ec41ffb783c0cfbb667ca1aa5061afa74c8e/AdvancedSteamSessions/Source/AdvancedSteamSessions/Private/AdvancedSteamFriendsLibrary.cpp#L277

They are expecting a uint64 and that's exactly what this dude is.

[rain ledge]

Hi, i`m at the end of the Main Menu Multiplayertutorial from gamedev.tv and i decide try to add Playernames. So the Player type the name bei Host or Join a game and this names are saved in a array on a actor spawned by the serverpawn. it works for the server (NeoBen) and for the first player that join (RitterPhilipp) but if join more player the names only see by the server and i dont know why. no hints in the Logs or eroors. Befor i Use the Set Owner blueprint, i get a warning, that the actor have no owning Connection, this warning was gone after i add set owner but the result doestn change.

[wheat magnet]

how to use photon multiplayer in unreal engine

[polar wing]

eyyy! I haven't checked it out yet, but has anyone seen if they really did update the CharacterMovementComponent in 4.26 with an improved prediction flow?

[jaunty river]

Hey guys please help me. How do I replicate an animation montage over network?

[winged badger]

you send a pointer to anim montage asset

and just play it

[polar pagoda]

How to travel to new map if im using seamless travel and connected to steam? (ServerTravel not work and just do nothing)

[winged badger]

its accessible

and its also guaranteed to exist on clients before BeginPlay

at least in case of GameState, not sure about Base variation

(the OnRep_MatchState in GS is what dispatches the BeginPlay on client's world)

[jagged stag]

Wondering what they ment by this in 4.26

[winged badger]

not sure about Base

exactly that

simplest way to use it is have say, interactable actors preplaced on the level

and start them as Dormant

then when they are interacted with for the first time, change their dormancy to Awake

@jagged stag

they won't replicate, or waste servers time evaluating them until they need to then

i could swear that was already exposed though

[jagged stag]

that's cool thanks

[winged badger]

waking them up is easy

if you want to flip them back to dormant

or if you want to make a spawned at runtime actor dormant

then you have an issue with relevancy

as dormant actor won't wake so it updates the client that was not relevant when it went dormant

so that client won't see it at all, or will see it in invalid state

you can do it for non startup things, just don't expect that to work out of the box

i find that guarantee that GameState exists on all clients before any Actor calls BeginPlay

too convenient to pass

there are not many guarantees with replication order

so would never use the Base variations

they could had used wrong type of GS

to access

have wrong GS on some level

they might be accessing it via GameMode or some stupid shit like that

that leaves worldcontext being invalid

normally UObjects don't have good GetWorld

to call statics from

but one can untick a context sensitive instead of implementing GetWorld

yeah i know what it does

result of that would be

GetGameState node

that has a WorldContextObject pin

that pin is hidden only if GetWorld is good for providing context

it should work, unless they did something unspeakable

is it vanilla GameState accessor failing?

[waxen socket]

Hello, with 4.26 released today, I'm not seeing much about replication with Chaos. I know Chaos is still in beta but has there been any news about this?

I know, it's still in beta and last I heard it was projected for default by "early 2021".

Despite being yote, has there been any news about its replication?

[whole urchin]

what's the difference between "Replicated" and "Repnotify" on variables ?

when do i use "Repnotify" ?

i just watched a guide, saying that "Replicated" will not update players joining late

but "Repnotify" will update that late player

so when should i use each ?

for example i have a boolean for aiming => "IsAiming"

i've set it to "Replicated", it works fine

but somebody told me, i should use "RepNotify"

same thing for my "RifleCombat" variable, they told me use "RepNotify"

so if a player join later than me, it'll update

[kindred widget]

@whole urchin Is IsAiming is just for third person anim stuff and you don't need it to do anything but change and let the animblueprint poll for it, you don't need a repnotify. What does RifleCombat do?

[whole urchin]

"RifleCombat" changes states from unarmed to rifle movement blend space

but i used in my character blueprint in branches (a lot)

[kindred widget]

Picture this. If you undo all of the logic since you began play. Reset the character to it's default state, but kept the same variables and their values, would your character be in the correct state? That's the important thing to consider with replication.

The ONLY difference between Replicated and RepNotify is that Notify calls a function on each machine when the value changes. That's it. The values will both get replicated the same way. So the only reason to use RepNotify is if you require a function to fire to change the state upon new replication.

So if your character would be in the wrong state upon a full rebuild with the same values, you'd want to use a notify function to set it's state correctly.

[whole urchin]

every variable i use is to change states

[clear sand]

After I updated to 4.26 I have now my dedicated server starting every time I do PIE. How do I disable it ?

[polar pagoda]

does someone work with seamless travel and can help me?

[winged badger]

you should just ask the question

[wheat magnet]

@kindred widget did you use photon multiplayer with ue4? or you have idea how it works?

[kindred widget]

First I've ever heard of it. I haven't really touched a lot of third party stuff.

[wheat magnet]

@kindred widget i build dedicated server, i want to test that server over wan(worldwide)

how it possible

[polar pagoda]

@winged badger I have using seamless travel with steam and when i want to travel to new map with the all of the player on the server using ServerTravel so nothing happened and i want to know how to do it

[winged badger]

its just ServerTravel <MapName>?listen

in ExecuteConsoleCommand

[polar pagoda]

i know, but its not work

[kindred widget]

Not really a dedicated server person either. My main networking projects have all been Listenserver base.

[winged badger]

departing GameMode has to have seamless travel enabled on class default

[polar pagoda]

already make it

[winged badger]

and seamless travel doesn't work in PIE at all

so you need a more complicated test

[polar pagoda]

its matter if i write ?Listen or ?listen ?

[winged badger]

don't think so

[wheat magnet]

@kindred widget you mean local area?

[kindred widget]

Listenserver is where one of the clients is also the server, rather than having a dedicated server application.

[polar pagoda]

@winged badger to test i upload the build to steam and test with my both pc's. when the functions called to servertravel like you write its do nothing and i stay in the first map like nothing happened at all

im using a plugin for a steam server "SteamCore"

[wheat magnet]

to open port, should i use tcp or http?

[empty axle]

@polar pagoda are you executing that server side?

Otherwise it won't work

[polar pagoda]

@empty axle when everyone is ready the function run on server to travel into the map

[empty axle]

Then I don't know. I would just debug the server travel method and see why it fails

[polar pagoda]

how can i debug it?

in PIE its work just fine but it is because seemless travel not work in PIE

[winged badger]

read the logs first

[royal anchor]

when a client disconnects from the listen server is there a way to log the reason for the disconnect?

[winged badger]

the client and server GI will have HandleNetworkError called in BP

with a vague reason

[vivid seal]

im working on setting up my ability system right now, and i have a basic prediction system set up (including predicting costs of the abilities and rolling those costs back if the abilities fail). The one thing i'm struggling with the most right now is integrating the CMC with this. Currently, my ability is called on the client, the client checks all costs, then performs the "client version" of the ability which is mostly just cosmetic. Then the ability component sends a struct through a Server RPC with any input parameters. The server checks costs again, deducts them, and replicates the results of the event, performing the actual "server version" of the event which can actually inflict damage, apply buffs, etc.

now, with CMC if my ability was something like a blink or a dash, i'd want to put that in a saved move and integrate it with the movement component, but i'd need a way to check if the ability succeeded on the server before applying the movement, and then correct the client if not. I know there's no way to guarantee which would come first between my "Ability Use RPC" and the CMC rpcing the movement from the ability, so i'm not sure how to get this working.

[royal anchor]

its a start at least, thanks Zlo

[rancid grotto]

With combat and animations what exactly needs to be done to replicate hand to hand combat?

[unkempt tiger]

In the net profiler, is the vertical axis the number of outgoing bits?

(the axis whose scale is from 0 to 4000)

I assume that when reading the chart, each horizontal sample refers to a network frame?

Which is why when I look at a measurement over seconds, such as Outgoing Bandwidth Avg/s, it's way higher - because every sample is actually a kind of sum of the neighboring frames in the window of the last 1 second?

[dark edge]

@rancid grotto it'll depend on your combat system.

You need to think about what the minimum state of the character is and what could be generated from that State versus what needs to be synced. For a first person shooter, for example, really the only synced state is the player location, and direction, and maybe velocity. Everything else is reconstructed from that.

[rancid grotto]

@dark edge its just hand to hand combat...creatures fighting each other...

Are there any guides for setting it up properly?

[rapid bronze]

Normal animations can be replicated just by making sure the variables that drive the State Machine are replicated too from your Character BP

For example you could have a bCrouching that dictates if your Character needs to be in the crouching animation or not, be sure in this case to set the bCrouching through RPC and not directly, and obviously set it as Replicates

For attacks instead they will most likely be Animation Montages that play on command, same concept, RPC them but they will most likely take place just in your Character BP

[dark edge]

@rancid grotto that doesn't exactly narrow it down. On the scale from world of Warcraft to Street fighter to mordhau, what type of system are you talking about.

[paper lava]

Hello! I've built my server separately and launched it. Seems all good so far but when I connect with the client, the controls don't work at all.

I think it might have to do with this: [2020.12.04-07.12.16:882][644]LogGameMode: FindPlayerStart: PATHS NOT DEFINED or NO PLAYERSTART with positive rating

but I'm just guessing

Is there anything I have to do additionally to make it work?

I should probably say this is gonna be an RTS-style game and I only use a camera pawn to be controlled

And it works fine when I Play in the editor

[empty axle]

@dull lance check the logs. I had similar situation in the past when I exceeded the maximum size of structure that can be send by RPC. That caused clients to disconnect from the server

no

it will kick the player

[paper lava]

I have now overriden Find Player Start in my game mode and I don't get that message in my log anymore but the inputs still don't hit.

any help?

I also capture the mouse now but it doesn't seem to change. It seems like the inputs are not forwarded to the player controller

[winged badger]

    /** Return true if FindPlayerStart should use the StartSpot stored on Player instead of calling ChoosePlayerStart */
    virtual bool ShouldSpawnAtStartSpot(AController* Player);
``` i didn't read up what the problem is, but i'd bet on this gem @paper lava

in GameModeBase

makes your PC call FindPlayerStart exactly once, when it loads the map

then use the same start for the rest of the match

and i did read it up right now

[paper lava]

ok

[winged badger]

the game mode also prefers to have a player start per player

[paper lava]

I just checked. FindPlayerStart is being called (I've overridden it in my game mode)

should I access ShouldSpawnAtStartSpot or what can I do to fix this?

[winged badger]

that one

is if players always restarting at same spot

starts to annoy you

[paper lava]

ah ok

[winged badger]

or if you can't change player start after you load some external info (like player selected team)

then that function will cause troubles

its really terrible

[paper lava]

I see

So any idea about what to do here? I really have no idea on where I should start to tackle this

I've tried capturing the mouse, tried different input modes

it just doesn't react as if the game was ignoring my inputs

[winged badger]

did any actor call beginplay?

[paper lava]

yes, my player controller

it all seems to work well, my player controller is spawned, camera is where I expect it to be, game mode begin play is called, player controller begin play is called but my inputs are ignored

[winged badger]

are you in wrong input mode?

[paper lava]

I tried different input modes

[winged badger]

BP or c++?

[paper lava]

bp

and this is only when I run dedicated server / client

in the editor it works well, even when I use play as client

[grizzled stirrup]

Anyone else getting a fatal error crash with no useful info after their 2nd or 3rd seamless travel in 4.26 (shipping builds only)?

[winged badger]

@grizzled stirrup build source engine, copy the project, open it with source engine version and cook it from there

then you can run debuggame from VS with engine symbols available

[grizzled stirrup]

Thanks doing that now and enabling the shipping logging target.cs option

[paper lava]

My inputs don't trigger on the player controller when in dedicated client. Any ideas on how to solve this? Can I maybe trace what happens to the input?

[paper lava]

One step further:

LogPlayerController: Error: EnableInput can only be specified on a PlayerController for itself
LogBlueprintUserMessages: [bp_PlayerController_C_0] Client 0: player controller begin play

this happens in editor client and in dedicated client but maybe this is the issue?

I don't even know where EnableInput is called, can't find it

[thin stratus]

Use the Blueprint Search to search in all your Assets for it

[paper lava]

I did that, can't find it anywhere

[thin stratus]

It more or less sounds like you are using GetPlayerController 0 in a bunch of places where you should use the controller relevative to the player

Cause if you use GetPlayerController0, you always the callers controller. DedicatedServer for example could return the first player's controller or maybe even nullptr.

[winged badger]

it would return the controller of the first player that logged in

which is never what you want, really

[thin stratus]

But GetPlayerController 1 is still nothing or?

Because the Index is for Local Controllers or do DedicatedServers return player's controllers?

Never really tried that

One of those things where you never really run into the need of thinking about it if it's setup correctly

[paper lava]

I avoided that consciously

I don't even know if Error: EnableInput can only be specified on a PlayerController for itself is actually why it fails but I don't know what else.. Except maybe when it gets packaged, it leaves something necessary out?

because the odd thing is that it only happens in my dedicated client.

[winged badger]

@thin stratus it would return null

index is somewhat weird

to find controller's index you need to increment a counter while running FConstPlayerControllerIterator

and matching the controller you're looking for to *It

fairly convoluted, i think

[thin stratus]

I usually just use the controller iterator

[winged badger]

same difference

but index 2 logs out

[thin stratus]

Just weird that GetPlayerController0 doesn't return nullptr on the Dedi

[winged badger]

index 3 becomes index 2

[thin stratus]

Yeah usually I don't require any index

I only used the index in the past for Local Multiplayer

[winged badger]

LocalPlayerController would return null

but it does have all the PCs

[paper lava]

@thin stratus any other ideas on how to solve this? Really don't know what to do from here

[thin stratus]

Yeah but GetPlayerController0, on ListenServer setups, returns each players Controller

So the same on a DedicatdServer, just logical wise

should sort of return null

Cause the dedi server is no player

[thin stratus]

Not without spending more time on it, which I don't have atm ):

[paper lava]

:/

ok, thanks anyway

[winged badger]

class APlayerController* UGameplayStatics::GetPlayerController(const UObject* WorldContextObject, int32 PlayerIndex ) 
{
    if (UWorld* World = GEngine->GetWorldFromContextObject(WorldContextObject, EGetWorldErrorMode::LogAndReturnNull))
    {
        uint32 Index = 0;
        for (FConstPlayerControllerIterator Iterator = World->GetPlayerControllerIterator(); Iterator; ++Iterator)
        {
            APlayerController* PlayerController = Iterator->Get();
            if (Index == PlayerIndex)
            {
                return PlayerController;
            }
            Index++;
        }
    }
    return nullptr;
}

it won't check if its local

and it doesn't go through ULocalPlayer

which one might do if doing splitscreen

[opaque sigil]

Idk if this is the right channel for this but is it possible to make permissions if yes, how

[meager fable]

@opaque sigil https://www.youtube.com/watch?v=abmzWUWxy1U&list=PLZlv_N0_O1gYqSlbGQVKsRg6fpxWndZqZ this tutorial series cover some of the topic you are interested in

[opaque sigil]

k ty 🙂

What video has the perm thing cause i already have most of this

[unkempt tiger]

I'm at a complete loss, does anyone know how to do this step for profiling networking using Unreal Insights?

[kindred widget]

@dull lance Listenserver will, but it should only be used for local client stuff. Getting the local controller/character, getting HUD, that sort of thing. I use it a lot to get the HUD class since the controller has an easy call for it. Also used it in my inventory component's widget to get the currently controlled character to use their inventory component to RPC. But that's about the extent you should use it for.

In C++?

Blueprint I'd understand, but you can generally use the same calls without the library include in C++.

[edgy dagger]

Is there anyone experienced in open ID (google and facebook) Integration for mobile that could help me out on something

[quiet fjord]

i guys

[winged badger]

@dull lance @kindred widget i prefer having a static function that takes world context and returns GameInstance->GetFirstLocalPlayerController()

GetPlayerController[Index] is only good for iterating over all the PCs from BP imo

for (0 to GameMode->GetNumPlayers - 1) GetPlayerController[Index] basically

now that's a good reliable use for it in BP 🙂

[twin juniper]

https://i.gyazo.com/0ecf333cc48e5fd48f736fc66c2f8cfb.mp4

This replication issue is becoming a problem for my game now.

What exactly am I doing wrong with this that it wont replicate properly?

The player locations do not synchronize properly. If I the server moves left, I am sliding left on the client's side. This seems to be a client-bound issues more than it is a server one, as I can see the client move prediction working as needed server-side. The client can not seem to predict the server player's movement's properly.

[young yoke]

I found the issue to broken player movement and interactions in PIE, after switching the project to 4.25: https://answers.unrealengine.com/questions/979714/addmovementinput-stops-replicating-when-converting.html

[winged badger]

@twin juniper simulated proxies aren't supposed to do any prediction, that is only for autonomous

looks like you're replicating position+velocity intermittently

and then client just goes along last velocity vector until it gets corrected

[polar pagoda]

Someone can help me? Im using SteamCore plugin to connect to the steam server and when im attempt to use servertravel so nothing happened and everyone stay in the first map with no changes (Seamless Travel is enabled and im execute command "ServerTravel FeatureMap2?Listen") PLS PM me🙏

[twin juniper]

The config files seemed to 'fix' the lag movement problem in editor and standalone by stablelizing the server movement sliding, making it hardly noticeable and reduce to hickups. I do hope there is a way to eradicate the lag movement entirely if possible but for now, it will suffice for the MP game. What still remains however is the firing. The spawn point is not replicating properly on client, granting too much distance between projectile and weapon.

I have to head to work at the warehouse, but I will return to read any replies far as the replication problems.

[unkempt tiger]

Anyone know why the server's outgoing packets seem to be clamped at 8000 bits? Is this some default value? Or is it my ClientMaxRate divided by the number of packets per second?

[winged badger]

you can configure that in defaultengine.ini

the defaults are pretty low

[unkempt tiger]

Oh, what's the setting?

And why is it low? What will happen if I set it to too high?

[winged badger]

don't remember off the top of my head

shouldn't be hard to find

[unkempt tiger]

Aight thanks I'm alook for it

[steel vault]

@unkempt tiger https://drive.google.com/file/d/1IF7TpZXYR9n-LrxcLkLkHb8Ko6TbCbDQ/view look at the bottom of that PDF I believe

[unkempt tiger]

Huh

Is there no nice place that documents exactly what all these configurations are?

It seems like information is scattered everywhere lol

[steel vault]

I've never found a nice place for it, no. Everyone usually just posts their settings here from finding it in forums.

At least that's in PDF form lol

[unkempt tiger]

I found this variable in NetDriver.h

I can try and follow it to see what it gets set to

[summer tide]

How'd mini map work in multiplayer? So I followed the UE4 tutorial to add minimap to my project. I need to have a BP_MiniMap in the level.

[unkempt tiger]

A minimap would be drawn by the client based on whatever data the client has

It's not something that should be directly replicated, unless it should show data which is not relevant to the client, and thus needs to be manually replicated

[summer tide]

What I'm saying is. When I place the mini BP in the level. I know it ony happen on client. How can I grab the ref.

[winged badger]

to UPROPERTY(Config)

i would imagine

@summer tide it works locally

you only need to prevent it from running on dedicated servers

all actors that need to be displayed on map should register with it locally

no networking involved whatsoever

[summer tide]

Yea so I need to use GetActorOfClass of BP_Minimap to get the ref in my char BP

THis is what I did. https://gyazo.com/c66a497471a708d28a1728d7433e3d9f

[winged badger]

you do have some kind of "singleton" actor on the level no?

[summer tide]

yes

[winged badger]

so you can preplace BP_Minimap on the level

set a reference to it on your "singleton"

and access the BP_Minimap via the "singleton"

instead of doing getallactorsof class

[summer tide]

Sorry what is singleton. I tried to grab the ref of th eBP_Minicam via the level BP.

Stored in my game-instance.

[winged badger]

i do have plenty of data in level BP

i just never do any logic there

for example, all quasi-singleton actors on the level

LevelManager, FOW_Manager, Minimap...

are assigned to LevelBPs variables whenever the level is saved

minimap would actually make a good world subsystem

[summer tide]

What's the concept behind saving and loading a steam multiplayer game

Is there any sample BP project outthere?

[vital heron]

What do you mean by saving and loading

[summer tide]

@vital heron So when you run the game in steam multiplayer and you save the game, it saves on the server only into a file. When you load do they all have to be in the lobby or loading during in-game is fine?

[vital heron]

Well for the saving part you will need some sort of data storing thing

I suggest taking a look into a thing called playfab. I used to use it when I was back into Unity and it was great, but I'm not sure if it is compatible for ue4

Also for the loading it honestly depends on what you want to do since you can do both

As for BP sample projects I don't think you will find any but you can definitely find a lot of good tutorials for steam online

[royal anchor]

https://nerivec.github.io/old-ue4-wiki/pages/blueprint-multiplayer-respawn.html

im at a loss on where this fails for a local server. Works fine on a dedicated server. I think its because the call gets made on the server player controller, still trying to figure it out. New to UE4 Networking still.

I have a widget make the respawn call, it casts to a clientside on the player controller validating if the player has a pawn or not, if not it does the server event which i think is causing the mixup

[steady dirge]

I am trying to understand how to use dedicated server in Unreal. So I started form zero https://unreal.fluiddynamics.eu/dedicated-server-for-dummies/ Comments and suggestions are welcome

[paper lava]

hi!
I'm requesting to spawn a character from the client to the server. Is there a way to return that character to the client after spawn?

so that I might work on it on the client, and only on the requesting client?

[unkempt tiger]

I'm noticing that my input packet contains 2 input buffers rather than 1 (pink) - which is weird because the net update frequency is 60, and only every 1000/60 ms is a new input generated by the client and sent to the server

This is true while some other packets indeed contain just one input buffer:

(which is desirable)

Each input buffer is sent via an RPC, could it be that indeed, RPCs are packed into the same packet rather than being sent in different packets?

I thought the latter was the case up until now..

Thankfully it seems like indeed, keeping the net frequency on 60hz but having the client generate an input at 50hz means some packets have no input in them which makes sense

it'd still be really nice to know if I could ensure a single input buffer per packet, since that jitter can introduce a very unwanted processing delay jitter on the server

[winged badger]

client can't send an RPC with input packet between its frames ^^

[unkempt tiger]

is there any function that gets called where I can send my RPC?

Some OnNewPacket() function kind of thing?

[paper lava]

is there an event when an actor gets replicated from server to client?

[winged badger]

the static delegate from FWorldDelegates for new actor will get broadcast

as client has to spawn the replicated Actor

yo=u can try to track a better hook from UPackageMapClient::SerializeNewActor onwards tho

there is also the fact that the new Actor tends to call BeginPlay right after its spawned @paper lava

[paper lava]

ok

I was hoping I could grab that event on the player controller somehow

[winged badger]

you can just do

virtual void AThisActor::BeginPlay()
{
  Super::BeginPlay();
  
  // optinally add checks if client, for Role, or whatever  
  if (AMyPC* PC = Cast<AMyPC>(GetGameInstance()->GetFirstLocalPlayerController())
  {
    PC->RegisterThisActor(this);
  }
}

by far the simplest way to do about it, only situation where it doesn't work immediately is if you delay BeginPlay and spawn/replicate the actor before match has started

[paper lava]

aye

is there something like get first local player controller in bp?

[winged badger]

that abomination of GetPlayerController[0] unfortunately

[paper lava]

will that get my local player controller or could I run into issues with other people's player controller when it's MP?

[winged badger]

depends how you use it

there are safe ways, and there are ways that break everything

[paper lava]

I would prefer to avoid the ways that break everything 😆

[winged badger]

in this particular scenario, from BeginPlay of an actor

it will work as long as you don't try it on dedicated server as well

because dedi doesn't have a local PC

so if dedi instance were to run that, it would affect PC of whichever player logged in first

from listen server and clients, it would work normally

[paper lava]

right. Can you think of anything why I don't have that node available? I only have getPlayerControllerClass

[winged badger]

which node?

[paper lava]

getPlayerController

[winged badger]

its static, its available from any Actor or ActorComponent BP

or Widget BP

its just UObject BPs with no GetWorld implementation that can't use it

[paper lava]

ok. I was trying to use it in actor but appearently the actor doesn't want me to get the player controller :>

[winged badger]

it definitely works from there

[paper lava]

ah, there we go. it doesn't work in the constructor

[winged badger]

constructors don't have world context

[paper lava]

ok

makes sense

gotta construct before being thrown into the world

[winged badger]

BeginPlay is a good place

as all replicated variables that you changed on server when you spawned the Actor will also be set by the time its called on clients

[paper lava]

that's perfect

@winged badger works great, thanks!

Can I manually set which actors should be replicated to which clients?
I want to replicate all actors that anyone on the clients team has vision on.
On the server I would need the actor and the client. Even better If I could presort this so I only have to calc which actors are replicated to the team once

perfect if I could set a list of clients to replicate to on conditions

[winged badger]

not with blueprints

[paper lava]

ok.. so I was thinking

• take every actor on team a
• get all actors of team b in their vision radius
• check line of sight
• if visible, add to visible characters for team a
• set replication for visible characters for every client in team
• repeat for team b

would this be possible?

@winged badger I guess it's better to do something heavy like this in cpp anyway

[winged badger]

overriding AActor::IsNetRelevantFor can do it

as can ReplicationGraph

(mutually exclusive approaches)

[paper lava]

replicationgraph sounds like a good place to start

@winged badger would it be possible to tell the clients to remove actors that are not visible anymore?

[winged badger]

clients destroy non relevant non-static actors by default

and respawn them when they become relevant again

[paper lava]

ok

[slim matrix]

why dose add instances for instance static mesh not work in multiplayer what so ever it just wont replicate

[meager spade]

you cant replicate instance static meshes.

[slim matrix]

like if i do add instance world space as a multicast it replicates but add instances as multicast dose nothing

basically i cant make the server add multiple instance's at once for the client it can only be done by the client which means the server cant tell the client how many instances to add

[vivid seal]

hey is there a default place in the CMC to add custom validation for moves on the server? for example if i want to prevent movement while rooted, I could override GetMaxSpeed(), but I'm mostly looking for a generic place to put any restriction code if one exists, that way when the server receives a move I can say "was I trying to move? am i rooted? if yes, don't bother actually moving. was i trying to jump? am i stunned? if yes, don't bother jumping", etc.

[peak sentinel]

Is there any possibility that we can see something like steamworks for mobile? That we can connect people with listen server model, but not from local network?

[slim matrix]

how to do you make a dynamic foliage in multiplayer

[kindred widget]

@slim matrix That's a rather vague question. The amount of ways is pretty huge. Depends on how large of a scope you want.

[slim matrix]

like ive tried using instance static meshes and the foliage actors in UE but i cant get ether to replicate and the only way i can make foliage is with just static mesh actors but that will get very performance intensive when you have a lot of foliage

[kindred widget]

@slim matrix Do you just want to replicate it being picked up, but still be able to draw it with the foliage tool?

[slim matrix]

like i want to randomly generate foliage that can be destroyed and saved

[kindred widget]

I've messed around with a couple of methods. The first was just locations of foliage. It was replicated from the server as vector2D. The clients themselves would do traces from a high Z level to hit the landscape and place the foliage. The second was actually rather nice. It was a single component placed in the level and it would only replicate an array of "picked up" folliage, so clients could remove it on their end based on the replicated location.

Depends on if you want respawning in the same spot or not.

You could replicate an initial location array and keep a second smaller array for common use. First array is the random spawn locations, second is the picked up ones. Destroy/create ISMs at those locations.

To be fair, if you're using C++ and you fast array it, a single array of Vector2Ds won't be that bad just for the locations.

[slim matrix]

yeah i would probably want to make a chunk system

that way it only handles loading in areas around the player to decrees arrays size

[kindred widget]

Certainly. I had that thought at one point too. Creating separate actors that handle it based on the level they're in, but that was intended to be a complex method for world composition and very large maps. Suppose it could work for smaller maps too.

Planned on making a painting tool and such for each actor so as to be able to place foliage in the editor around the actor. Was going to compress the vector data from a full vector down into just two uint16s

But yeah, in the end it just comes down to your use case and how you can integrate it easily into your work flow for your exact design. 🤷‍♂️

[slim matrix]

i was thinking of making a chunk actor that has child foliage actors that of handles and another actor that handles the grid of chunk actors

[gloomy tiger]

Hey there! When do you use Reliable RPCs vs Unreliable?

[winged badger]

player input that doesn't happen on Tick and Gameplay Critical Stuff thats better late then never vs. everything else

[slim matrix]

@gloomy tiger Mainly if you need to do something important like spawn an actor or set a variable you want it to be reliable that way it will 100% happen unreliable would be use for something your constantly changing like a player location

[gloomy tiger]

Hm, thanks guys.

Something like firing a weapon...

I wonder which one is best.

[unkempt tiger]

It depends on how you go about passing inputs to the server

[slim matrix]

I would make it reliable

[gloomy tiger]

I'm calling a Fire RPC when user presses left mouse button, that's all.

[unkempt tiger]

Usually a pretty straight forward approach is to reliably send a packet every time you shoot

[gloomy tiger]

And then I send it along.

Hmmmmmmmmmmm..............

[unkempt tiger]

For my purposes i have a semi-reliable way of sending and buffering inputs

And processing them with a slight delay during the server's simulation, so the client doesnt send a reliable RPC whenever it wants to shoot the bullet - the server would already process the input in which he fires

etc

you can go about it in numerous ways

[slim matrix]

I think Im having a problem I’ve had is sprinting with the character controller if theirs any sort of lag then theirs jitter and it seems the only way to fix it is by doing c++ and client prediction

[unkempt tiger]

what do you mean doing c++?

[slim matrix]

Basically for changing the characters speed you need to do some c++ client prediction code for setting the speed to prevent jitter when you set the players speed

[winged badger]

if you predict movement (default CMC) and you don't predict sprint speed changes

you get jitter

but usually something as simple as modifying the speed locally when you send ServerSprint

is sufficient

[slim matrix]

This video explains what my problem I’m having is and how he fixed it https://youtu.be/RtQRMcupJs0

[terse prawn]

When using the console command "open <IP Address Here>"
is there a way to stop that from working if the player changes their mind?
I Have noticed that if the client executes the command before I open the lobby, it puts them in the lobby as soon as it opens.
Can I prevent that from happening? as in give the player a "does not exist" message or "failed to connect" instead of constantly trying in the background until it works.

Thanks in advance!

[peak sentinel]

Yeah, this guy is legend

[slim matrix]

unfortunately it is a very complex solution an i heard epic may have plans to fix this

[unkempt tiger]

I can confirm this is complex, it's why I dedicated a good number of months to come up with my own fix (although that fix is just for players atm)

By fix I mean implementation that allows me to not have to really do a bunch of setup if I want to add more custom movement

Like the sprinting mechanic in that video

[thin stratus]

All Input Based Movement, atm, has to go through the CMC in the same way.
Everything you do in BP only or in C++ without the CMC, and every tutorial you find that does this, are basically wrong.
Sprinting in BP only with some OnRep and setting it locally too, are of course working, but they are also wrong.
If you enabel the correction debug you'll see that either get corrections when starting and/or stopping to sprint.

[peak sentinel]

iirc ShooterGame also inherits CMC and adds sprint function there

[slim matrix]

i mean for now i have correction disabled till i figure out how to do the c++ sprinting but also my game isn't a super competitive game that will mainly do local multiplayer so hacking wouldn't be as big of a problem but i would still like to get it to work

Unfortunately with a lot of those tutorials they add other things like wall running but I’m just adding sprinting so it gets complicated to follow

[peak sentinel]

If you add me friend I can send you the discord of Reid* so you can ask the question to him directly if you are having problems with his tutorials

[slim matrix]

K

[bitter talon]

Hey, do you know how to exit from replay mode without reloading level?
I need to replay goals in a multiplayer sports game.
I can record, stop, play but I can't find how to get out after playing the replay 😅

[thin stratus]

Not sure the replay feature was for that stuff, but could be wrong

[polar wing]

"Improvement: Increased the default NetDriver bandwidth limit to roughly 100 KB/second. This will help alleviate latency users would experience when reaching the old limit. This new limit is still well within the ability of modern internet connections."
Cool little tweak in 4.26! Anyone seen an improvement in their projects? Especially RPC-heavier projects.

[winged badger]

you can tweak that with defaultengine.ini config anyhow

they just changed the defaults

[sweet robin]

I'm having trouble closing out a session (prior to the game starting). I have the players in a waiting lobby, when the host DCs I want to close the lobby for everyone. I'm calling DestroySession() for both the Host and the clients, but it doesn't really seem to do that. The host is still able to call methods on remote player controllers. This also leads to a host/client not being able to join a new session.

[winged badger]

@dull lance use fastarrayt

not if you don't rick replicate movement

on actors

they get stuck on initial transform

tick* the checkbox

use fast array in single actor

item should just have

UPROPERTY() TWeakObjectPtr<AActor> Actor;
UPROPERTY() FTranform Transform;

and callbacks do both PostAdd/Change

if (Actor.IsValid())
{
  Actor->SetActorTransform(Transform);
}

and instead of replicating it via gazzilion actor channels

you do it over one

thats a struct

so no

it goes into FFastArraySerializer

which is a struct inheriting from said FFastArraySerializer and having an Array of your items

that should, yes, be replicated

you do not want a gazzilion actors being replicated for replication at the same time

[shadow schooner]

quick q. If I wanted to assign automated roles at game start(not post login), should I script this inside of gameState or gameMode?(I am reading the 'Unreal Engine 4' Network Compendium and I am a little confused)

[unkempt tiger]

The roles are set for you

By the engine, you don't need to set them

That is, if you're talking about net role

[shadow schooner]

no no oops

I mean custom roles

like teams or something

[winged badger]

where do you pull the info from which you assign them from?

[shadow schooner]

wdym pull the info

[winged badger]

you determine which player goes into which team somehow

how?

[paper lava]

Is there more documentation on the replication graph somewhere?

I can only find this: https://docs.unrealengine.com/en-US/InteractiveExperiences/Networking/ReplicationGraph/index.html

[chrome bay]

ShooterGame has a complete example, but that's all there is AFAIK

Pretty easy to understand once you break it down though

[paper lava]

ok, I'll look into that, thank you

[steel vault]

Is anyone else getting an engine crash when ticking off "Run Under One Process" in Editor Preferences under Edit>Editor Preferences in 4.26?

[shadow schooner]

random by giving a special id to each player and then choosing x random ids to go to team a and the rest ids to go to team b @winged badger

[steel vault]

0x0000000000000000 UnknownFunction []
0x00007ffe56a44399 UE4Editor-OculusHMD.dll!UnknownFunction []
0x00007ffe7e0ba22c UE4Editor-AudioMixer.dll!UnknownFunction []
0x00007ffe63fcd9ac UE4Editor-Engine.dll!UnknownFunction []
0x00007ffe6400351e UE4Editor-Engine.dll!UnknownFunction []
0x00007ffe6401ae13 UE4Editor-Engine.dll!UnknownFunction []
0x00007ffe640416a3 UE4Editor-Engine.dll!UnknownFunction []
0x00007ffe6401ac06 UE4Editor-Engine.dll!UnknownFunction []
0x00007ffe64fbdd77 UE4Editor-Engine.dll!UnknownFunction []
0x00007ffe64fb84a3 UE4Editor-Engine.dll!UnknownFunction []
0x00007ffe64415df9 UE4Editor-Engine.dll!UnknownFunction []
0x00007ff7c7702f55 UE4Editor.exe!UnknownFunction []
0x00007ff7c7720fc2 UE4Editor.exe!UnknownFunction []
0x00007ff7c772121a UE4Editor.exe!UnknownFunction []
0x00007ff7c773527d UE4Editor.exe!UnknownFunction []
0x00007ff7c7737faa UE4Editor.exe!UnknownFunction []
0x00007ffedb257c24 KERNEL32.DLL!UnknownFunction []
0x00007ffedb44d4d1 ntdll.dll!UnknownFunction []
``` More specifically it might be something to do with running in VR mode with 2 players. Seems like a strange crash just want to see if anyone has the same.

[unkempt tiger]

works fine for me

Not doing anything VR related though

[steel vault]

@unkempt tiger Did you try launching in VR? Or is that not possible as an option without an HMD hooked up?

Shows up for me as an option maybe because I have one connected or because SteamVR is in my plugins list.

[unkempt tiger]

I did not, IDK what checkbox to tick

Oh I haven't got anything like that

[steel vault]

Ok, thanks for at least giving it a shot for me!

[regal sand]

Do any of you guys have experience with the SmoothSync plug in? My team and I are looking to use it; but we want to know how it can be used for a large scale project

[meager spade]

@steel vault grab the engine symbols aswell

will make that callstack more informative.

[steel vault]

@meager spade can't believe I forgot to add those when I installed 4.26, now the error is quite clear it's a UE4 bug

[winged badger]

with 4.26? im shocked 😄

[steel vault]

I wish there was a quicker way to get bugs fixed like that. Where's ma personal Epic dev 😉

UE4Editor_OculusHMD!FOculusHMDModule::GetAudioOutputDevice() [D:\Build\++UE4\Sync\Engine\Plugins\Runtime\Oculus\OculusVR\Source\OculusHMD\Private\OculusHMDModule.cpp:227] Who devs for Oculus anyway

[meager spade]

disable it

if your not using oculus?

[barren patrol]

Does anyone have experience with attachment systems for multiplayer? e.g. RPG-style armor slots and weapons. Is having multiple attached actors going to scale to 50+ players in game?

I wonder if there is a more optimized way to manage these attached meshes

[kindred widget]

@barren patrol Avoid replicating all of that. Just replicate a list of items equipped in each slot via like an ItemID. Let clients themselves spawn the correct mesh to set via the simple replicated data.

[barren patrol]

Ah, yeah. Network overhead can be optimized that way. What about processing overhead? I guess if the actors don't tick, it should be fine.

[steel vault]

Tried that and now instead of crashing just the second instance it closes both without any crash or any error :/. Will just have to wait for a fix and launch out of PIE for now I guess.

[unkempt tiger]

Xero can you remind me how to get those? I forgot to get them as well

[steel vault]

@unkempt tiger go to epic launcher, click down arrow on 4.26 next to launch go to options, then check editor symbols

[unkempt tiger]

is it just a matter of ticking that Editor symbols-

yes, very good-

is everything then taken care of automatically? No need to do some other symbol config stuff?

[kindred widget]

@barren patrol Shouldn't change anything for the clients CPU wise except for when the values are replicated. All replicating an attachment does is tells the client to attach the same thing to the same parent on the client. The client would still be the one attaching/updating movements, etc. The difference being that it has one more object on the replication list to deal with rather than the base actor with a simple little list.

[steel vault]

Nope, the crashes will be much more verbose after that

Sorry I meant yes it is all automatic

[rustic hound]

hey guys, im trying to get something to spawn in a procedurally generated multiplayer level

is it better to place the spawning function in game mode or in the level blueprint?

the spawned object in question is not a player

[thin stratus]

When in doubt, never use the LevelBlueprint

It can be properly accessed from outside in BPs and it's only per level

next map you gotta code the same stuff again

(unless some c++ to have your own class, but even then it doesn't make much sense)

So yeah, use the GameMode

[rustic hound]

makes sense

thanks

oh right, if an object is spawned by the game mode, is it naturally spawned for other players as well or do I need to replicate/multicast the spawning?

[thin stratus]

Nothing is "naturally spawned for other players" unless you make that class replicated

Doesn't matter where you spawn it (must be on server though)

[steel vault]

Also, GameMode is owned by the server so the clients won't know to spawn it.

If you wanted it to be a non replicated spawn you could include it in something the clients own like GameInstance

I find it best to eliminate the need to replicate wherever possible to cut down on traffic.

However, going back and reading that you are doing it procedurally, it makes sense to do it in GameMode and then replicate those actors to other clients so that everyone has the same positioned things.

[rustic hound]

ah, ill switch my spawn function to a multicast then and see how that works

its a one-time spawn too, so aside from spawning after the level is generated, it wont eat up traffic anymore

thanks for the help 😄

[steel vault]

Be wary that multi cast won't work for late joiners. If you need a one time spawn then just do it on the server but make sure you somehow replicate the positions of things for late joiners.

[rustic hound]

coincidentally, i dont plan to allow players to join the session midway, so luckily i wont have to bother thinking of a way to fix that

[limber gyro]

out of curiosity, does any 1 have any experience with developing MMORPG's with UE4?

i am quite curious how that would look like since the server only holds 100 players max

[rustic hound]

i believe most MMORPGs break down the world into many different areas and servers

so a single area/region of the world would actually have multiple servers handling it

[limber gyro]

ive read about people saying that you would need to code a custom server

but i think that would be too much of a task for any smaller group of devs

i've also looked into spatial OS which does what you said i think

[rustic hound]

most likely yes

i dont think the basic sessions system provided by unreal was designed to cater to MMORPG games as well*

[limber gyro]

UE4 is more session based but there have been big name MMOs made with UE3

lineage comes to mind

[rustic hound]

the best advice i can offer you (since i havent really delved in UE4 MMORPGs either) is that there are quite a few tutorials on youtube about making UE4 MMORPGs, so maybe quickly go through them and see if any of them do tackle the player size issue

(assuming you havent already)

[limber gyro]

oh no, im not going to make an mmo im just curious

i am making a session based FPS at the moment, MMO's are only the next step if this one makes money, a man can dream hehe

[steel vault]

In general, especially with UE4, you won't ever complete an MMO with a small team or without any financial backing. A very large team, which requires a lot of money and resources, is your best bet, and even then, that doesn't guarantee you success or that you didn't just waste a lot of time/money. It's usually inadvisable in this discord if you ask around.

[rustic hound]

im encountering another issue, for some reason, the host of my listen server is running the Event OnPostLogin twice in my game mode

which is overriding the host from spawning in properly with the rest of the clients

is it intended for the listen server to run OnPostLogin twice?

[rustic hound]

okay wait nvm, just found out it wasnt

apparently the function I had running under OnPostLogin was also being run somewhere in my playercontroller and I totally forgot about it

which was causing it to look like the OnPostLogin was being run twice by the game mode

i feel pretty silly now since i've been trying to solve this issue for a whole day now

[fringe dove]

where do we get the clang v17 toolchain for building linux dedicated servers on windows?

the link here seems to fail:
https://docs.unrealengine.com/en-US/SharingAndReleasing/Linux/AdvancedLinuxDeveloper/LinuxCrossCompileLegacy/index.html

in engine it only seems to go to v16:

/mnt/c/git/UnrealEngine$ find . -name 'v*_clang-*centos7'
./Engine/Extras/AutoSDK/HostLinux/Linux_x64/v11_clang-5.0.0-centos7
./Engine/Extras/AutoSDK/HostLinux/Linux_x64/v12_clang-6.0.1-centos7
./Engine/Extras/AutoSDK/HostLinux/Linux_x64/v13_clang-7.0.1-centos7
./Engine/Extras/AutoSDK/HostLinux/Linux_x64/v14_clang-8.0.1-centos7
./Engine/Extras/AutoSDK/HostLinux/Linux_x64/v15_clang-8.0.1-centos7
./Engine/Extras/AutoSDK/HostLinux/Linux_x64/v16_clang-9.0.1-centos7
./Engine/Extras/AutoSDK/HostWin64/Linux_x64/v10_clang-5.0.0-centos7
./Engine/Extras/AutoSDK/HostWin64/Linux_x64/v11_clang-5.0.0-centos7
./Engine/Extras/AutoSDK/HostWin64/Linux_x64/v12_clang-6.0.1-centos7
./Engine/Extras/AutoSDK/HostWin64/Linux_x64/v13_clang-7.0.1-centos7
./Engine/Extras/AutoSDK/HostWin64/Linux_x64/v14_clang-8.0.1-centos7
./Engine/Extras/AutoSDK/HostWin64/Linux_x64/v15_clang-8.0.1-centos7
./Engine/Extras/AutoSDK/HostWin64/Linux_x64/v16_clang-9.0.1-centos7
./Engine/Extras/AutoSDK/HostWin64/Linux_x64/v8_clang-3.9.0-centos7
./Engine/Extras/AutoSDK/HostWin64/Linux_x64/v9_clang-4.0.0-centos7
./Engine/Extras/AutoSDK/HostWin64/Linux_x64/vNext_clang-Next-centos7```

[outer echo]

Hmm that doc says it is automatically downloaded in the setup.sh script after 4.20

[fringe dove]

I think I've had to download it every release, maybe just because the installer handled the env variable?

opps, I linked to the legacy page

the non-legacy one: https://docs.unrealengine.com/en-US/SharingAndReleasing/Linux/GettingStarted/index.html

but the v17 link doesn't work there either

hmm, clicking the link didn't work but copying its url into toolbar did...

must be some weird chrome thing with exes

[true spade]

Im working on multiplayer game logic and I was wandering is there any tutorial how to implement a game rules, I do understand how the replication works, but Im unable to crate Mods for multiplayer, let's say Free-For-All mode. I have functioning (re)spawns, score for kills, but cant figure out how to make game end. For instance, if any player reaches 30kills, I'd like to play animation on score widget and show 'Match End' screen to every one and cancel session, and then start load lobby?

[steel vault]

@true spade https://docs.unrealengine.com/en-US/InteractiveExperiences/Framework/GameMode/index.html

GameMode is where you would create a ruleset for the game such as FFA and GameState would handle keeping track of what is happening in the game and would be able to tell if the game is over or not based on PlayerStates

Once the gamestate realizes that one of the players has reached a goal of 30 kills or whatever limit, it can flip a replicated variable bGameEnded = true and in the On_Rep function for all players you can play the animation, show the end screen/do whatever you want. You could probably get away with a multicast here as well.

Everything is basically triggered by that change in GameState.

[true spade]

Thank you for the answer and the clarification, I think I understand now. I'll try to implement it. Thanks

[steel vault]

Calling all steam experts: I recently tried to host a Steam Session on a packaged build of my game using the SessionInterface, and it seems to work because on my other packaged build on a different computer, I can search the list of Steam Sessions with app_id 480 and it shows up. When I click it to join, my logs say that it succeeded, but I get no form of server travel at all and the game remains playable, but acts like it's not trying to join. Here is my entire log:

Packaged builds are in 4.26 if that makes any difference.

[winged badger]

@steel vault takes logs from both sides to figure something like that out

[rose egret]

not being able to RPC or replicate TMap has ruined my codes so bad 😩 any advise ?

I am sick of writing UStruct for them

[kindred widget]

Funny enough I often prefer making a struct with an index over making a Map.

[modern swift]

hi guys I have no idea why when I host a dedicated server , the first client leave the server will close automatically after the first client leave and the second client join the game ,https://paste.ofcode.org/GafhRpRHLTkeb4Vxbx4Kmg here is the log , thank you very much if you can help

[ember osprey]

Where is the Dedicated Server check box 4.25.4 source build my options:

Like this from the documentation for Setting up Networked Testing:

[kindred widget]

@ember osprey Advanced settings.

Launch Separate Server to be exact.

[ember osprey]

Thank you! Much appreciated!

[safe marsh]

anyone have experience connecting to an unreal editor listen server over WAN?

[polar pagoda]

If i use a game settings on my map and this BP is spawning all of the players in each group so i use as a default pawn "none" and when they travel from the lobby into the game they not spawn as a character and stuck inside the wall without movement but if i set as default pawn a main character so everyone spawn but without any child characters like i want to. there is a way to fix it?

[whole urchin]

i wanna print string a variable of a character (in network) but only in respective screens

how do i do it ?

[kindred widget]

@whole urchin I normally just use the Kismet/Blueprint PrintString. It'll say which machine it's printing from.

[whole urchin]

but it'll show all clients in 1 screen

i wanna print the HP of the owning character in their respective screen

i dunno if it's possible

[kindred widget]

You could make the local HUD draw text on screen. 🤷‍♂️

[whole urchin]

ok !! i can do that

[steel vault]

I believe you can also do an IsLocallyControlled() check before you print to keep it on the owner’s screen.

[limber gyro]

trying to fiigure out how to make code that handles stuff like HP reduction not run on the client

following code does not work

if(GetWorld()->GetNetMode() != NM_Client)
{

does any 1 know whats the line of code that i am looking for?

[languid whale]

I have a problem with a destructible mesh, the collision updates on the server and client but the mesh does not fracture on the client. Any ideas what could be causing this?

[signal lance]

HasAuthority() or GetlocalRole() == Role_Authority

@limber gyro I'm on my phone so might have messed up the naming but should help you to find it

[limber gyro]

i am calling this from the player character, doesnt it have authority?

i might be wrong tho

[signal lance]

Depends on how it's getting called, but in general nothing automatically runs only on the server (authority)
If it's something that happens as a result of some event that all clients and the server will experience you can filter it by doing if(HasAuthority())

[limber gyro]

ive tried the has outhority, didnt work

[signal lance]

It entirely depends how the hp reduction stuff is getting called, also for the client to receive the hp changes HP needs to be replicated

[limber gyro]

yes it is

but the character is controled by the controler which has authority localy i think

[toxic lion]

I'm trying to throw items when a key is pressed.
When the action is pressed, the item is spawned in front of the player, and Add Impulse is called
At the moment, only the server can see that the item is launched.
The client just sees the item drop to the floor with no impulse added
Any ideas?

[limber gyro]

you gotta add that impulse in the client aswell

or else it wont know

[kindred widget]

@limber gyro You should be doing damage checks and such on the server anyhow. Client should only ever have access to ask the server to do them. So checking to not do it on the client isn't the issue so much as why is the client even trying to run that in the first place?

[limber gyro]

well thats a good question

i basicly have an RPC called "applyDamage" that is called when a palyer suffers damage

in the base character class

but it is being called in both the client and server, i am not sure if that is suposed to be happening

[wheat magnet]

does anyone use photon multiplayer sdk with unreal?

if yes, can you explain how photon actual works with unreal engine, and how unreal engine is sending data to photon server?

[limber gyro]

not sure if you will have much luck with that here, i have yet to see any 1 talk about photon

[toxic lion]

@limber gyro How can I break out of being the server, and add the impulse to the spawned object on the clients?

I tried a new owning client event, however no impulse is added

[limber gyro]

you can use a client function OR you could for example make an add impulse on the begin play of that object

if the object is replicated that add impulse on the begin play function should be called both in the client and server i think

[toxic lion]

let me give the second option a shot.

[signal lance]

It means you don't have movement replication enabled for the item, server replicates movement to the clients when enabled

[toxic lion]

@signal lance

Replicate movement is turned on on the base item, and not overwritten for any of the item children

[dense narwhal]

Is it possible to trigger an event on a client from a server, without the client beeing owner of the actor?

[toxic lion]

@limber gyro so created a variable that is exposed at spawn AddImpulse. Begin play checks, and adds impulse if true

Client does not see the impulse however

[limber gyro]

umm weird

what if you give it a crazy impulse?

wait

i am not sure if it work wit hphysics replication

do the same thing but "get actor location" then add to that value +500 or so

instead of the impulse

[toxic lion]

yeah higer impuse doesn't do anything.

[limber gyro]

i think it might be an issue with physics replication

if that set position works then it is the physics

[toxic lion]

client just always sees it drop straight down

[limber gyro]

if so then you will probably have to use a client RPC and the position might be differ from the client

no no no

forget the add impulse

[dense narwhal]

Question, cpk.. What settings are you using for splines, that looks insane.

[limber gyro]

just do a set position

[toxic lion]

as such? only input is a float

[limber gyro]

it should work, i have somethign similar on my project

with rotation

[toxic lion]

@dense narwhal it's a plugin called Electronic Nodes

[limber gyro]

you need to do it on the root actor

strange

this ->setActorLocation

sorry i said the wrong function name

[signal lance]

Movement replication with physics works fine

[limber gyro]

does it?

[signal lance]

Yes

[limber gyro]

i was under the impression that unreal didnt do that because of network bottleneck

[signal lance]

It's meant for that, it replicates location, rotation, linear and angular velocity

[dense narwhal]

Thanks!

[limber gyro]

@toxic lion ok i think i know what the issue

[limber gyro]

you are trying to add impulse to the child componenet

and that wont replicate

[toxic lion]

very very possible

well well well

if I make the skeletal mesh the parent, then the impulse is replicated to the client

[limber gyro]

this thread was the answer

https://answers.unrealengine.com/questions/884047/server-side-physics-simulation.html

[toxic lion]

Thank you! I'm going to play around with it a bit to see if I can knock off that extra variable.

I can now just add impulse as I was originally trying to do. Thank you both!

Side question.
I've made the base ItemBP with a skeletal mesh, and all items use that mesh even if they will not have any animations
Is there anything wrong with this? I want to have some items have animations which is why I went with skeletal instead of static

[tranquil yoke]

Hey guys, how would client knows that it has disconnected from server ?

[dense narwhal]

Let me just bump this: Is it possible to trigger an event on a client from a server, without the client beeing owner of the actor?

[signal lance]

Multicast will run on all clients

[dense narwhal]

I know, but what if I want to target a spec player?

isnt multicast kind of wasting resources, if it's just suppose to happen on one player. Just thinking out loud.

[tranquil yoke]

yes, you can do that, all you need is an event, which will do something on the actor you want, so it does not matter that actor is owned or not,
only that actor should be owned which is going to have the event, so you put your event on player controller, which is always owned by the client, make sense ?

and do run on owning client event .

[signal lance]

well yeah in that case you can just use the good old Client Rpc but the question was "Is it possible to trigger an event on a client from a server, without the client beeing owner of the actor"

[dense narwhal]

Well.. to be fair.. 'on a client'

nvm, I got my question answered, thanks! :love-heart:

[tidal crown]

Howdy, I'm struggling to parse and/fetch options I'm setting when calling Open Level from BPs. When my client binary connects to my dedicated server binary I see this log line: Join request: /Game/Maps/MAP?GameCode=OMGHI2U?Name=DESKTOP-OR95V4D-ABF122B7482C674CE28D93806821F03A?SplitscreenCount=1 My expectation was that within my GameMode in the dedicated Server I should be able to read this using Parse Option but it always returns nothing...I am trying to read by attaching to Event OnPostLogin...any ideas what I'm doing wrong?

[tranquil yoke]

@tidal crown what are you parsing ?

[tidal crown]

Options String

in GameMode

[tranquil yoke]

which option?

[tidal crown]

GameCode

I am passing it (and observing it in the logs)

but when I try to read it using Parse Option on the server-side it never has a value.

[tranquil yoke]

how did you get the options ? is your Options having value ?

[tidal crown]

I'm wondering if this is a weird client -> dedicated server transition thing when I am doing Open Level to the dedicated server.

I see the code path run in GameMode immediately and never again when I reconnect to the dedicated server.

[tranquil yoke]

i do this on Prelogin and it worked fine, i used Options Variable inside game mode and for me that was null, so can you please tell me, what are you using to get the options value ?

[tidal crown]

The "Options String" variable

This is in GameMode

thats predefined in GameMode

what's weird is this is what I see on the server-side: [2020.12.06-19.18.11:803][501]LogNet: Join request: /Game/Maps/MAP_K_PGameCode=OMGHI2U?Name=DESKTOPE94F98C74C5806A53D982185158ED5F7?SplitscreenCount=1 2020.12.06-19.18.11:807][501]LogBlueprintUserMessages: [BP_KenopsiaGameMode_C_2147482574] SERVER: ?Name=Player

I'm printing Options String and its totally different than what I'm getting in join request.

wait a sec

Options != join request does it.

[winged badger]

is that your entire Getlifetimereplicatedprops?

but you have just one replicated member, with onrep?

do the other members replicate?

[halcyon totem]

I am trying bind something to an event to open a door, but it wont work on the client. any idea?

I tried different combinations but the door still wont open for the client

[winged badger]

and you did UFUNCTION the onrep?

also you used actual breakpoints to verify?

[limber gyro]

i gotta say, seeing ATank with questions makes me feel like i am not a complete noob in unreal, if even the big boys have questions some times how can i not, haha

[winged badger]

i assume yes for the first question, i doubt UHT would allow it to compile otherwise

[limber gyro]

ofc you are, you always answer peoples questions, i mean, probably not as big as Zlo but still

zlo is the biggest of boys 😆

[winged badger]

indeed, Tank is 5cm short

😄

[limber gyro]

you guys know each other irl?

damn you guys are tall af

i dont think they make computers on your size guys

[winged badger]

its just a floating point error

did you breakpoint the OnHidden?

[steel vault]

Better get my steam host logs while Zlo is on...

[tidal crown]

I figured my shit out, I needed to override PreLogin to read the options... the "Options String" isn't the same thing.

[tranquil yoke]

@tidal crown yes same thing happened here

[tidal crown]

I was expecting there to be some sort of BP exposed thing, but I had to expose it myself manually...

[winged badger]

no other warnings?

[tranquil yoke]

@winged badger how do you know if client is connected with server ?
like if connection is active or not ?

[winged badger]

and you're setting the boolean to the ! of what it was before?

from where? @tranquil yoke

[tranquil yoke]

on client ?

[winged badger]

it will have netmode ENetMode::NM_Client

[tranquil yoke]

i have case, where is client is connected with server, but undersome circumstances, client goes to sleep and meanwhile server kicks that client out because of the time limit, for inactive player.

but client does not know right away that it is disconnected from server, does not give a good user experience .

so i need to know, if my client can still talk to server, if not move then re joins the server.

[winged badger]

unless server send a close

they won't DC till after timeout

you can configure the timeout lower

aside from that... not sure if there is anything you can do, short of bouncing keepalive RPCs

[tidal crown]

What's the best way to check that the GameMode is the server role?

in C++

(In my overriden GameModeBase)

[winged badger]

you assume that it is

[tranquil yoke]

@tidal crown game mode is always server

[winged badger]

and you are right

because there is no gamemode on clients

[tidal crown]

OK, do I need to unset it on clients? I have the default game mode set and the default server game mode to the same thing

is that a bad practicE?

[winged badger]

server is for dedicated server builds

[tidal crown]

this is dedicated server, sorry

[winged badger]

it doesn't matter

[tidal crown]

OK! good to know

[lost inlet]

huh?

[winged badger]

only server's world will instantiate the GM

after being loaded

[lost inlet]

"unset it on clients" what does this even mean

[tidal crown]

the default

in the ini

Project settings

[lost inlet]

it's not on the clients except for the gamemode class in the game state, which is not an instance

[winged badger]

that would probably be bad

[tranquil yoke]

@winged badger i see inside logs, that client do Handshakes and even we can still use the clients , so it seems like code knows, that it is not connected to server, can we tap these events ?

[tidal crown]

@lost inlet sorry, I mean the config

there's a default game mode option in project settings for both the client and the server.

I have them both set (I 100% realize they are not shared/replicated)

[lost inlet]

do you even need to set this?

[winged badger]

you should probably (re)read the exi's compendium @tidal crown

[tidal crown]

OK I def understand the relationship, I think I'm just explaining poorly. When the game first loads its not connected to the dedicated server...so it bootsup w/ a local Game Mode for that duration of time.

then, open level -> connect to dedicated server, bam no more game mode locally right?

at that point its owned/controlled by server only and its a totally separate instance unrelated to the client as expected.

@dull lance it has to be

its in a different process memory space 🙂

This

there is one

[lost inlet]

?

[tidal crown]

until there isn't

[lost inlet]

why is this important first of all

it's just a class

[tidal crown]

right, what i'm saying is, they don't have any relationship.

one is fully on the client (at load) and the other is fully on the server (at connect)

literally they aren't connected to one another/synced/replicated, as the compendium says.

I'm agreeing

[lost inlet]

you'll probably have a main menu map, but you typically use a different game mode for this. that runs locally

[tidal crown]

that default GameMode is running before I open Level on dedicated server tho

yes!

that's what I'm trying to get at poorly 😛

[lost inlet]

override that in world settings

easy to do

[tranquil yoke]

@tidal crown use IsDedicatedServer node

[tidal crown]

right now they are identical and thats probably bad

was what I was getting at

[winged badger]

why would that be bad?

[tidal crown]

becuase it gives the false appearance that they are somehow related.

[winged badger]

i mean you can make a simple separate GM for main menu level

[tidal crown]

@winged badger yeah, that's what I should do.

[winged badger]

but other then that, w/e

[tidal crown]

yeah that makes sense.

I was doing client auth in there (PlayFab) so I probably need to move all of that to a local-only game mode that is run by the main menu only.

[supple mural]

What's the best way of getting someone's ping?

[tidal crown]

I think its on the Playercontroller or player state?

[supple mural]

Yeah it's there

Thanks!

[limber gyro]

i need to spawn a bunch of diferent particle effects attached to the player at the same time but i dont want to make multiple particle components cause thats jsut messy, those effects need to be replicated ofc so having a particle component would be ideal, does any 1 have any idea how to achieve this, multiple effects simultaneously with only 1 particle component?

i have a few replicated variables that would manage the effects

the alternative would be to spawn an effect attached i think but that would require a multicast and i would like to avoid that

[steel vault]

Are you using Niagara? I would just make a Niagara system and add each effect you want to it.

Also, what's the issue with making separate components for each effect?

I would just create each Particle system component for the actor, attach them, and activate each separately in code anytime you receive the replicated event to play it.

[limber gyro]

there is no issue i jsut dont like it, too much stuff, too messy

can you just add stuff to a niagara system?

like multiple systems?

[steel vault]

Yea that's what it's made for

You can create a bunch of emitters then make a system and put them all in there

Might be able to control each separately in code but I haven't tried that yet as I don't need to. I just create components for each effect and it is compartmentalized/logical. Nothing about it seems messy to me.

[limber gyro]

but you cant put 2 at the same time can you?

it is messy, if i need to have 100 effects later

simultaneously

am i just gonna add 95 more components?

[steel vault]

If you have 100 effects simultaneously you're going to have a mess anyway 😂

But yea if you want to create a system that plays 100 effects at once you can

You just have each effect in its own emitter, then create a new system that combines them all, hot swap that system out in the component and activate it.

[limber gyro]

ye but it still only 1 system per component right?

[steel vault]

Yes

[limber gyro]

i have effects that are based on systems so i dont know how that would work

esssencialy i need multiple systems at once

[steel vault]

Then you either spawn them at runtime without a component, or you hot swap and activate.

Or you do like I said and have a variable on each emitter that somehow activates it, but I haven't tried that and it sounds overcomplicated and unnecessary

[limber gyro]

but then they wont play simultaniously no?

[steel vault]

Correct.

So you need to fix your systems or have a bunch of components

Or you have a function that spawns and plays them all at once

So not using the component at all

Also, this should probably go in #niagara since this is veering off the path of multiplayer. Apologies for flooding.

[limber gyro]

ye thats what i was trying ot avoid

indeed

i ws just asking here because i wanted to avoid multicasting

[steel vault]

You can, create a state variable with a bunch of enums/tags and switch it on server and when it replcates you play the system

It's really hard to just assume what you're trying to accomplish though, so there are probably better alternatives but I can't suggest them without knowing.

[limber gyro]

its for status like sleep, poison, stun

for example a character can be poisoned and stunned at the same time

[steel vault]

Yea so if you want to avoid a bunch of components attached to your character then I would just create the niagara system at runtime and play it

[limber gyro]

the thing is i need those systems to last x amount of time, and i dont think fx's can be created with a timer

honestly supper messy

[steel vault]

Yea they most definitely can. You can give it a lifetime

[limber gyro]

i can?

oh

[steel vault]

Niagara is incredibly powerful

Whatever you think you can do with it, you most likely can

[limber gyro]

but not in a sense of particle life time

[steel vault]

You can create a user defined variable on the system for lifetime and set it on runtime

You can user define variables almost everywhere in the system and change them dynamically

[limber gyro]

interesting

[slender yarrow]

what is the proper way to have a widget access a variables in the playerstate?

[tidal crown]

I'm using PlayFab for multiplayer user identity, and they provide a PlayFabPlayerId that'd I'd like to use as the PlayerState UniqueId. It's an FString and I'd need a way to make an FUniqueNetIdRepl...any suggestions on best way to do the conversion?

there's a protected method that can go from string, would the idea be that I need to subclass the FUniqueNetIdRepl type?

OH wait, nvm found this: https://docs.unrealengine.com/en-US/API/Plugins/OnlineSubsystem/FUniqueNetIdString/index.html

[steel vault]

Ok, so I finally got around to retesting my packaged game in 4.26 with steam from two different computers, and I got relevant logs from both the host and joining computer clients for a listen server. I think @winged badger might be gone for today, but if anyone else spots anything out of the ordinary would appreciate some feedback! The host didn't have too much going on it was mainly the joining client that has issues.

https://answers.unrealengine.com/questions/942990/steam-unable-to-create-listen-server-session-in-pa.html

I also just found that link which seems to be a similar problem and he disables the plugins for steam, but that just makes me think something is being set up incorrectly.

[tidal crown]

OK I guess I'm still confused, if I'm triyng to make a custom UniqiueNetIdString, should I be subclassing it to specify a type?

ultimately I'm tripping up on my GameMode base getting mad saying I have an incompatible_unique_net_id

I have the onlinesubsystem set to null

and I just want to set my own custom value here.

the subsystem it reads out is Null by FName, which is correct.

so I just need my UniqueNetId to be of Type Null

https://docs.unrealengine.com/en-US/API/Plugins/OnlineSubsystem/FUniqueNetIdString/GetType/index.html

That's what needs to return Null for my custom type.

omg...there's an explicit constructor for custom Type...

sorry I totally missed this.

its almost too easy thats the problem 😛

[kindred jungle]

I need some advice about organizing event and data replication:
Let's say I have an array of actor refs, like a list of items picked up by a player, or something like that.
When something is added or removed from that list I want to inform all players about it. I can do that by replicating that list. No problem there.
When I want to also trigger something when the list changes I can use rep notify and it will trigger when the list changes. Again no problem.
However, I would like to pass some additional information, like a reason why the value changed - and I can't do that with rep-notify.
So, I can create a multicast event that passes all the info I need. However, when that event is received I cannot be sure that the updated list has already been relicated.
Client might receive an "update event", but the list still contains old values.
I can pass the whole list as a param in the multicast event. That way I can pass additional info and make sure what everything is synchronized. But that means I have to send the whole array each time. Also in this case Im manually replicating the array so it doesnt have to be replicated automatically (although that is still useful to set the initial state when a new player joins). I can also pass only changes and each client can keep track of the whole array on its own.
This solutions seems a bit weird to me. Am I missing something?

Lets limit it to blueprints for now 🙂

[summer tide]

Let's say I mount a house. How can I prevent other players from mounting the same horse?

[kindred jungle]

@summer tide horse has a variable "rider"

if rider is valid, you cant become a new rider

[steel vault]

You simply call from the client a server RPC that tells the server to put you on a horse and then put yourself on the horse locally as well.

Yea I forgot to deal with state in order to prevent mounting. Replicated state variable of some kind.

[summer tide]

@kindred jungle I do have a rider variable. If I validate this, it will work on other players trying to mount the horse. But then what if the rider trying to dismount. Since I use the same key for both

[kindred jungle]

if (rider == me) dismount else mount

[steel vault]

Reset the rider variable to an empty value.

RiderPtr = nullptr;

[summer tide]

Yea thanks @kindred jungle . I was able to use your logic. Since I already had similar variables in place.

@steel vault I'm already doing that as part of the riding sys.

[steel vault]

Argh, can't get this damn steam connection to work and 4.26 breaks my run in separate process so I can't even test multiplayer anymore 😦

[halcyon totem]

what would be the best way to spawn in players in a game that uses level streaming? right now my players keep getting spawned in the areas where we just streamed out of

[lyric mural]

Hello, I have a trace running that runs off players location, detects another actor in front and pulls up their profile - I am wondering how I would properly do this? I cant figure out how to get the profile to pop up on the client screen, it is only appearing on the servers screen

Any sort of help would be appreciated, Im somewhat of a noob with replication

[eternal anvil]

Hello 👋 Does anyone know if PlayerState.GetPlayerName() will be the same for clients over non-seamless server travel?

It seems so in my test but I'd like to know for sure

[steel vault]

@lyric mural why are you doing line traces on the server for a simple profile pop up? I would do all of that client side and just pop it up locally instead of involving the server at all. That doesn't seem like an important server function.

[lyric mural]

I was trying to do it just client but it wasn't returning the ID

Not sure what I'm missing

[twin juniper]

is it like impossible to replicate objects or what?

[winged badger]

its not impossible

[faint saddle]

I'm having trouble getting steam to work with 4.26

It seems to use steam 147

but the only download at the steam site is for 150

[twin juniper]

so should i just make my object into a structure will it work?

[winged badger]

UObject replication needs some c++ to work

but it does work just fine

[vivid seal]

UObject replication looked scary the first time I did it without much c++ know-how, but I got it working just fine with a few tutorials and questions here and once you’ve done it once it’s easy to do again.

[winged badger]

UActorComponent is a replicated UObject

even without a tutorial you can steal everything you need from there

[twin juniper]

thanks for the info guys i'll see what i can do in c++

[dark edge]

@twin juniper what are you trying to do where you need a replicated object without actor?

[twin juniper]

inventory uses object for drag drop operations

then uses that object to spawn item

[dark edge]

Like your representation of an inventory item is an object?

[twin juniper]

i have an array of them

1 per item

its a spatial inventory

[dark edge]

I'd make it just data i.e. a struct

[twin juniper]

i'm not sure if you can use structs for drag drop operatiosn

[dark edge]

How would the UI have anything to do with it? You can have whatever sort of UI you want but the end result should be a transaction moving an item.

Spatial inventory isn't really any harder than any other kind, just your "CanItemFit" logic is a bit more complicated.

[twin juniper]

would you use this function?

[dark edge]

That's all just UI, has nothing to do with an actual inventory system.

You'd run some logic on the OnDrop event to actually do the inventory manipulation

[twin juniper]

yup and the payload is how i get that objects information using that function

[dark edge]

None of that needs to be replicated. Your end result should just be a message to server like "I want to move item x to slot y in container z"

[twin juniper]

its using the item objects data to spawn the object though

anyways its late for me trying again tomorrow

[winged badger]

@twin juniper for that you put a struct into UObject thats drag&drop context

if you want to use structs for inventory

[polar pagoda]

do someone know what can i do if the players spawn with "SpawnActor BP" and i set in GM the default pawn as none to let the BP spawn all the player, but there is a problem. when i start the game with only one player as host everything load normally but when there is more then one player the character not spawn and everyone is stuck with no movement. there is any way to fix it? (this is similar to the among us spawn when all the players use servertravel to move from lobby into the game map)

[manic agate]

Quick question from a multiplayer newbie: does a dedicated server have a UWorld?

Also, if I place an actor within a level, in a dedicated server would the PostInitializeComponents() function of that actor be called?

[winged badger]

yes to both

dedicated server only doesn't have a local player