multiplayer

[winged badger]

you'd need to RPC every single change

then server sets the replicated properties, and those replicate to other clients

[keen hound]

How would I detect if a player joined a server

I'm assuming post login

[winged badger]

HandleStartingNewPlayer is best place to put spawn logic in

[cedar lagoon]

Hum, cause I wanted the client to spawn it locally (so no lag at all) then be able to to move it as he wants while still being replicated to others but not to the player

[winged badger]

it works both for hard and seamless travel

you have to RPC every client local change to server if you want other clients to see it

there is no way around that

except starting from FScoket and implementing p2p

bypassing unreal's replication system entirely

[cedar lagoon]

Ok it's clear then I'll simply go with a replicated actor and move that actor, would be way easier, but I loose the cool thing to not have any delay while the player moves the actor, anyway thank you for your help 🙂

[winged badger]

you can predict it

[cedar lagoon]

Sounds interesting

[winged badger]

you can spawn the actor locally, then have the replicated one replace it

when it arrives

as long as local PC is the owner of the Actor on server, Actor will be able to RPC its own stuff

[cedar lagoon]

Yeah thats what I tried, but I ended up having a local variable holding the local spawned actor, and another var set as replicated that hold the actor spawned on the server, but the problem is that since this actor is marked as Replicates, then the client was able to see it also

[winged badger]

you can try to cheat if you don't mind a minor performance impact

base that Actor on Character, use CMC with client Auth movement

[winged badger]

that bit is easy

basically

you Spawn Actor A on client, RPC to Server to spawn Actor A1

server sets the owner of A1 to PlayerController that requested the spawn

when A1 calls PostNetInit ideally, BeginPlay is also kinda fine, it checks if its Owner is a PlayerController and if that PC is locally controlled

then it contacts the PC "hey, replicated version of me arrived", PC destroys A, replaces A references with A1 refereces and pretends its the same Actor instance

(doable from BP, with BeginPlay)

[soft cape]

Has anyone recently attempted to remove "lobby" widgets from clients when the host initiates a ServerTravel()? Any call to removing a lobby screen widget seems to break the clients player controllers that are attached to the in-game pawn

[cedar lagoon]

Oh yeah I got it, I'll try that, do I need to keep the actor marked as Replicates right ?

[winged badger]

A1 yes, A doesn't matter

you can have it as replicated by default, it won't do any harm

[cedar lagoon]

Ok, then, make sense, thank yu so much, can't wait to test it !

[winged badger]

alternatively

you can have A1 cache the reference to PC that requested it

also set the owner

then use OnlyOwnerSee/NoOwnerSee

the approach used for FPS/TPS meshes in a FPS game

but client will end up having 2 actors, only one will be hidden

i find approach #1 more elegant

[winged badger]

use APlayerController::PreClientTravel

[cedar lagoon]

Yeha me too, especially for this project I think it don't requires it

@winged badger Thanks anyway, you are the kind of guy who really makes the unreal community greater, really appreciated.

[limber gyro]

if a have a cooldown float going down each each frame on tick, it should happen both in the server version and client version right?

[winged badger]

yes

[limber gyro]

im talking about a character

ok so why is it not going down tho

[winged badger]

Tick will execute on both

[limber gyro]

i have this snipet of code inside "tick"

but if check them inside a server RPC they are never 0

[winged badger]

ugh, those should be subobjects

[limber gyro]

doesnt run

[winged badger]

you're making a god class there

where is your Super call?

ah, this is not Tick

[limber gyro]

no no, thats just in child class

its a hero shooter so i have a base class for the heroes

and then all heroes are child classes

[winged badger]

that doesn't look like it should compile

[limber gyro]

why?

[winged badger]

server RPCs don't like non const& structs in their payloads

or any RPCs for that matter

[limber gyro]

doesnt complain

im in 4.26 if that helps

[winged badger]

odd

[limber gyro]

anyways, thats not why i am here xD

[winged badger]

and if you break that

[limber gyro]

why the heck is my server var not going down

[winged badger]

does it run?

[limber gyro]

what do u mean break?

put a break point on it?

[winged badger]

yes

[limber gyro]

let me check

runs just fine

[winged badger]

and when you break the tick after you hit the server RPC breakpoint?

[limber gyro]

you want me to put a break in the rpc and the tick?

[winged badger]

i want you to break tick

while stuck at RPC breakpoint

then continue

[limber gyro]

i just did

it says that the cooldown is 0

but the rpc says its 6

[winged badger]

note that you'll be hitting tick break on both client and server here

[limber gyro]

im hitting it only once tho

i think

[winged badger]

you should hit it immediately after continuing

[limber gyro]

i only see the 0 value

[winged badger]

and it should alternate between server and client

ok

[limber gyro]

yep thats what i was assuming too

[winged badger]

so

break the RPC only

trigger it

[limber gyro]

i was also assuming that i would see a 0 and a 6 in the values

[winged badger]

F10 your way past the line where the value is assigned in the RPC

verify its 6 in locals

then right click on the variable in locals and select Break when this value changes from the menu

then continue

[limber gyro]

i did all that

doesnt change

doesnt break

[winged badger]

if has to hit the data breakpoint

[limber gyro]

i dont know man, the game is jsut running normaly

nothing is breaking

[winged badger]

but RPC did break?

[limber gyro]

if i put the break point on it, it will break

i removed them to see if it would break on its own with the "break on value change" thing

im just trying to make a server check on the cooldowns so players dont cheat

NVM im a retard, i was checking the wrong variable

[keen hound]

how would I show a dedicated server in a server list?

[limber gyro]

u can create a session on ur begin play

in ur game instance for example

and then steam is gonna pick it up

if ur not using steam or a subsystem in general ur gonna have to implement ur own solution and talk with a master server somehow

[winged badger]

GI doesn't have BeginPlay

you need to configure the DS startup map, use GameMode BeginPlay

[limber gyro]

ye its not begin play its "Init"

[soft cape]

Works like a charm, thanks!

[limber gyro]

before i shoot myself in the foot

is it a good idea to set cooldowns both in the server and client and hope they are synced enough to not interfere with gameplay?

[fossil spoke]

Generally speaking, yes. You at least want the Server to have authority over a cooldown.

Otherwise Clients could potentially just cheat it.

[limber gyro]

ye thats why im giving it authority

i was just wondering if it was a good thing to do

[fossil spoke]

If you arent making some hyper competitive shooter or something, desync on the Client side should be fine.

[limber gyro]

basicly i have a "callSpell" function that will set the client cooldown and call the RPC, in the RPC i check the cooldown and set the server cooldown

well, it is a competitive shooter....

[fossil spoke]

Then maybe you need to be concerned about it being synced.

[limber gyro]

i will see how it goes in playtest

and go from there

i didnt want to replicate cooldowns cause the var update is a bit choppy, so i would need to make dummy variables

so it wouldnt look bad

[fossil spoke]

If you have a synced clock you can always send the timestamp and adjust the Cooldown to account for some latency.

[limber gyro]

i will keep this in mind

[fossil spoke]

If you are using GAS i believe cooldowns are pretty well managed for you.

[limber gyro]

im not using gas

i've been on this project for like 3 years

gas wasnt a thing when i started

[fossil spoke]

Pretty sure GAS is more than 3 years old at this point.

I could be wrong.

[quasi tide]

It is

It's been in since Paragon

[fossil spoke]

Yes I more meant available to the public

[quasi tide]

It has been.

[fossil spoke]

👍

[quasi tide]

It just wasn't all that well documented

[limber gyro]

well i wasnt aware of it when i started

i think

and even if i was i probably thought it would be overkill

[fossil spoke]

We picked up GAS much after it was released publically.

Its been very helpful.

[limber gyro]

i will 100% consider it for my next project

atm i just cant be arsed ahahah

[quasi tide]

Pretty sure even Valorant uses GAS

Could be wrong though. Don't quote me!

[hollow eagle]

iirc they don't as they started on valorant too early. They did build something similar.

I'd have to dig up where they said that though

ah, found it - https://www.youtube.com/watch?v=GO6MIboHDiY&t=4053s

[rain condor]

I can't replicate attach. SpawnActor it's replicated because if i put another location i'll see it

[plucky prawn]

How did you find that?

[hollow eagle]

by knowing about that video already?

[plucky prawn]

Ah fair

I forgot like... A lot of stuff I watch, or if I don't forget it, I forget the video it's from

[rain condor]

I tried this too and nothing happen

[rocky kestrel]

How server hosting works? I have currently hosted my own dedicated server locally with port forwarding. But I would like to upload my server to some cloud service. I have zero experience of that.

[elder sable]

Hi, Any member of FFastArraySerializerItem is serialized ?

[fossil spoke]

If your serializeritem overrides NetSerialze then no.

Otherwise any UPROPERTY member will be automatically serialized.

If you override NetSerialize you must serialize each member you need manually.

[elder sable]

Mhh ok thanks ! Will try to understand how they did with mass

[rain condor]

Attach actor return me false on sv but true on client

[obsidian cargo]

Is there any sort of event or OnRep to know when a runtime spawned component has replicated to a client?

I'm considering adding an event to the owning actor and having runtime spawned components broadcast through that event during BeginPlay if they are on the client. This has a code smell to me though.

I'm using the GameFeature plugin from Lyra to runtime spawn some components, but now I client UMG widgets to initialize based on the state of the replicated component.

[nova wasp]

http://www.aclockworkberry.com/custom-struct-serialization-for-networking-in-unreal-engine/

this article is pretty old now but might be useful

[winged badger]

void AActor::OnSubobjectCreatedFromReplication(UObject *NewSubobject)

[whole pine]

why isnt this replicating

[chrome bay]

Get rid of all that Multicast event. Set a replicated bool from the Server event, use an OnRep callback to set the visibility

[elder sable]

thanks !

[blazing spruce]

Hi, I'm having a slight issue with my decal spawning, it mostly works however clients don't see the decals that are spawned on walls but everything else is replicated properly.. I suspect its the rotation not replicating properly, any ideas how i can get it to replicate the rotation correctly?

[chrome bay]

Why would decals be replicated at all?

Decals are visual effects and should generally be spawned locally. Also on a dedicated server, particles don't exist.

[solar adder]

I spawn a replicated actor using multicast. On the creation i pass some variables to it. Why is it, that on the server these values are set correct, but on the client they have the default values, unless i turn on replication for those variables? I didnt expect that replication would be needed for those variables, since i create it on client with the same values

[blazing spruce]

I know that usually visual stuff doesn't need to be replicated and im not even entirely sure exactly how mine are replicating cause im not doing any RPC's for the decal spawning, however regardless of them being replicated or not, clients still dont see decals spawn on walls

[chrome bay]

You shouldn't spawn a replicated actor from a multicast at all. The server should spawn it.

[chrome bay]

Presumably you've marked the Blueprint as replicated - but if you haven't, then the decals aren't replicating at all.

But even if you do mark them replicated, nothing about decal actors is actually replicated by default.

So you'll have a decal actor with a position and orientation but nothing else.

[stable seal]

1-i have random anim montages for 1 movement like slide in the video. when one of them plays anim1 other one can see anim2 sometimes. Both gets random anims

2- idk why they teleport sometimes

[blazing spruce]

Okay so maybe im doing this whole thing wrong.. if i dont have the decal actor replicated then the clients dont see them spawn at all, i imagine thats because im doing the IsServer check when getting the collision data from the particle system, however if i dont do the IsServer check then the client see's like double the amount of decals spawning compared to the server player which isn't ideal

How should i be setting this up so decals spawn, doesn't matter if they're in the same location for everyone, but they are able to spawn on all surfaces?

[chrome bay]

The TL;DR is none of this should be replicated or care about networking at all. That Server check shouldn't be there and it implies something else is going wrong

EventReceiveParticleData would only ever be called locally

Start by disabling replication of the decal actor completely, and removing the IsServer check. 'BloodSpurt' shouldn't be replicated either.

Niagara/Particle Components don't have any network functionality

[blazing spruce]

Ahhh nice one that's done it, I think it was BP_BloodSpurt still causing the issue with it also being replicated, now ive removed it on all of them its working properly, thanks mate!

[stable seal]

ok 1 cause to 2 happen 😄

[solar adder]

ahh i see. Could you please explain something? I saw network corrections in some tutorial: As i understand they happen when some local actor falls out of sync with the server version

1. If i spawn a replicated actor on the server, it means that i dont have the local version on the client - only the replication, so there wont be any network corrections, right?
2. I thought that if i multicast a replicated version, i would receive a local and server copy, and the server would apply corrections to the local if it goes out of sync.
3. In general i am trying to figure out the best way to deal with projectiles - do i just multicast an unreplicated version. Because spawning a replicated version on the server seems to create jerky effect

[chrome bay]

If you spawn a replicated actor on the server, clients will create a copy of that actor locally when they receive it and replicated properties will be sent from the server version to the client version. If you spawn via a multicast, you will have two actors on the clients. One will be the Servers' replicated one, other other will be an extra one you spawn locally that the server has no idea about.

RE projectiles, hard to say. If you are spawning it as a replicated actor, with replicated movement, and the client also simulates movement locally, then most of the time it should be "fairly" smooth - but it won't be perfect.

The problem is that if a client spawns an actor locally, the server has no idea about it, so it can't do anything to/with it

[solar adder]

Thanks for the explanation! I think i get it now!

[limber gyro]

any 1 knows why this setup always returns 9999 ping?

[chrome bay]

If this is Steam, it's because doesn't report ping to lobby sessions.

At least, Epic's default implementation of it doesn't, you have to do it yourself in code.

[limber gyro]

oof

[obsidian cargo]

This is perfect!

[rain condor]

Any help?

[stable grotto]

How to test if an event is too heavy on bandwidth or CPU 🤔

[graceful flame]

Use the netprofiler to check bandwidth and unreal insights or session frontend to check CPU

[rose pollen]

jesus i just spent forever on a crazy bug, it seems that if you have a replicated actor with a child actor component and the child class is not replicated, the child blueprint will execute as both server and client and furthermore when it executes the "has authority" node will give both the server and the client authority

[quasi tide]

with a child actor component
Gross

[pallid rampart]

is it ok to check things like islocallycontrolled or has authority in beginplay or is there a better place?

[obsidian cargo]

Yes

You check where it is needed for the logic following

[rain condor]

Any idea why this not replicate attach?

Return true on client but false on sv

[coarse gale]

I think on rep only runs on clients, but not 100%

so from my understanding, you are setting the item to attach as a replicated variable, and then that is running onrep on all the clients, the server never runs the attach event. I think

[rain condor]

I tried this too

[coarse gale]

I dont really know what is required to do this as ive not tried to attach anything like this yet. But what I can say is that before you were only attaching on clients and now you are only attaching on server.

[thin stratus]

OnRep calls on everyone (that have an instance of the actor) however the attach should be replicated

Bigger questions are: Is that actor replicated and where is the RPC in?

[rain condor]

I found the issue

Player was not valid

Idk why

Because a made a initialization function who is called on bp_maincharacter beginplay

[fathom aspen]

I sinned and fiddled with one today

[fathom aspen]

There is better, use notifyrestarted

And if you're a blueprint guy, there is oncontrollerchanged i guess

[nocturne quail]

if I play the game with two clients, both are forced to look at the right or left, no one is looking straight forward.
is it possible to fix it

only the head is rotating by itself 😄

[whole pine]

if antoher client has a rep notified list of worn items, how do i retrieve them

[quasi tide]

https://tenor.com/biRz3.gif

[whole pine]

they are set to a structure variable

[coarse gale]

I was not taking into account that this is blueprints, I heard that repnotify in blueprints actually does run on the server aswell but in c++ it only runs on clients ?

[latent heart]

That is correct

[whole pine]

@latent heart

[whole pine]

how do i RPC scene capture

[mystic estuary]

Hello, I'm trying to replicate my UObject, but for some reason it doesn't call the OnRep whenever I change the value server-side. I'm following this https://jambax.co.uk/replicating-uobjects/, but it still doesn't work.

My UObject that I want to replicate:
Header: https://pastebin.com/ajCvkJC8
Source: https://pastebin.com/ttULH3Qc

The actor owning the UObject is the PlayerState:
Header: https://pastebin.com/qk9nWsQKr
Source: https://pastebin.com/9PQDzwQr

I call the AMTD_PlayerState ::SetHero() client-side, and it gets there, but the OnRep is only called server-side because I do it myself to run the same logic server-side as well.

Does anyone know why it may not be replicating the object?

EDIT: AActor::ReplicateSubobjects() says the following:

/** 
* Method that allows an actor to replicate subobjects on its actor channel. 
* Must return true if any data was serialized into the bunch.
* This method is used only when bReplicateUsingRegisteredSubObjectList is false.
* Otherwise this function is not called and only the ReplicatedSubObjects list is used.
*/

Hence it requires bReplicateUsingRegisteredSubObjectList to be set to true.

[grizzled stirrup]

When you have ClientAuthorativePosition=true does anyone know which part of the character movement component actually sets the location of the simulated clients on the listen server?

[whole pine]

each player has a rep notified structure variable that contains what items they are wearing, what they equip or unequip is replicated but i need to retrieve another clients scene capture from their inventory and also replicate the equipped and unequipped items there too

[latent heart]

You want to replicate a picture of what items somebody has in their inventory?

[whole pine]

or get their rep notified item array and attach it to the default scene capture every player has

honestly whatevers easier

[latent heart]

Why are you using a scene capture?

[whole pine]

to show equipped items when you open a players inventory

owning player already has it set up

idk how to retrieve other clients

[dark wing]

is this in kilo bits or kilo bytes?

[whole pine]

is it easier for me to just get a rep notified array of worn items from another client and equip them to the player in scene capture component? cause i have that rpc'd already

[mystic estuary]

Upper case b stands for Byte, while lower case is Bit

[half umbra]

if i use this "Get Game Time Since Creation" then for multiplayer game, everyone will have same time?

or i need put this time to replicated float?

[rain condor]

Why player return me not valid?

[sinful tree]

The "Set" of your Player variable in "Initialization" is not the same variable as the one you're accessing in OnRepItemToAttach. Are you setting the Player variable in the blueprint that has OnRepItemToAttach?

[rain condor]

It's the same

The second picture

It's replicated because it was an attempt to make it work

[bronze glade]

Hey everyone, this might be a silly question but I am fairly new to multiplayer systems and don't know much about cheating.
If I store variables on a blueprint actor, is that something that a cheating player could access and modify the variables on their client?
Opposite to this, if I store those same variables on the server instead and call them from the bp actor, could they still modify the values?

[mystic estuary]

How OnRep is supposed to work? I'm trying to replicate a UObject, but client-side the OnRep is called twice. The first time the argument is not nullptr (it has the old object value), while the replicated object is nullptr, and the second time it's vice-versa -- the argument is nullptr, and the object is valid, and has the server value.

Should it be working this way or I'm getting it wrong?

[grizzled stirrup]

ClientNetSendMoveDeltaTime is only the tick rate for each human player in a game right? No AI characters replicating down will be affected?

[real ridge]

HEllo guys I have question I cant solve one of my problems even I am debugging It, I have function which is called when I crash or my plane is killed it is called via ma controller and then its called to my game mode , it is working perfectly always just when I die with someone else at same time just one of us is respawned, in all other cases its working good,any ideas ?

and its called from my pawn

[obtuse field]

What are other methods of voice chat, that work on dedicated server beside EOS?

[fossil spoke]

Vivox

[faint parcel]

My FFastArraySerializer subclass's void PostReplicatedAdd(const TArrayView<int32> AddedIndices, int32 FinalSize); isn't being called, I don't know where to start debugging 😛

An item is added to the array, MarkItemDirty is called on the item.

[fossil spoke]

@faint parcel Does your FastArray ::NetDeltaSerialize function call FFastArraySerializer::FastArrayDeltaSerialize?

[obtuse field]

Are there any free solutions?

[faint parcel]

You helped me look in the right place.
I was missing this:

template<>
struct TStructOpsTypeTraits<FInventoryArray> : public TStructOpsTypeTraitsBase2<FInventoryArray>
{
    enum { WithNetDeltaSerializer = true };
};

Don't know how it works but it looks like it enables NetDeltaSerializer. How does it do it?

[obtuse field]

Also, I don't see it upgraded to UE5 https://www.unrealengine.com/marketplace/en-US/product/d4d29cc6d06f484b9e02caa32b1acf8f

Nvm. they said its deprecated

[fossil spoke]

https://www.4players.io/products/voice-chat/

ODIN is free I believe

Ive integrated it before.

Its pretty good.

Lacks some features.

I havent used it in a while.

So that might have changed.

[obtuse field]

Ty, I will take a look for sure

[fossil spoke]

It does it by magic.

[obtuse field]

It seems like it has both purchase and free version

[fossil spoke]

Yeah well you are unlikely to find an entirely free VC solution that has everything you want.

[hushed rain]

Say I want to have a rank system in my Listen server hosted game but dont want people to be able to print wins, is there some way to create a "consensus" between players to validate a match's results?

Or does steam have a built in system for this?

[quasi tide]

No sensible way really.

Each instance could report the game and you could just accept the majority or w/e

To some backend server that is.

But for ranking stuff, you really should plan for dedicated servers.

Not a single soul likes ranking systems and it not being on a dedicated server.

[hushed rain]

Yeah that's understandable but a lot of old games without dedicated had some sort of rank system I'm wondering how that worked

[quasi tide]

Very shittily

[hushed rain]

Maybe they just said fuck it who cares if people cheat lol

[fossil spoke]

Thats more the case yeah.

You have to remember to that older games would have had such a small percentage of people that would have even known or cared about cheating

Than todays games do

[hushed rain]

Yeah that's true

[sinful tree]

You don't want to have this event marked as Run On Server otherwise a client will be able to call it and feed it whatever data they want and at any time (if they're manipulating their client)
Your issue is because you're using the game mode event and a delay. When you trigger the event there is only ever 1 copy of it running, so the next time the event is called, the data from the previous one is no longer present so when the delay does finally finish, it's reading the second one's data. Perhaps it would be best to delay in the player controller before calling your respawn event in the game mode.

[soft cape]

Has anyone had issues with clients (sometimes) not connecting to host when using FindSessionById(), then calling JoinSession() after the completion delegate passes? It seems to be inconsistent where sometimes the client joins host without issue, and other times the client gets a Timed out connection error.

Even JoinSession() will return back true but the client will still time out. Thought this method approach would be the ideal way for clients to connect along with their host, but it seems something wrong is amidst

I'm on UE5.1.1 if that matters

[obsidian cargo]

Is it possible to have a component set the rep condition COND_OwnerOnly on itself? I'm using GameFeatures to spawn components on actors, and you can't set LifetimeReplicatedProps on those types of components.

[hollow eagle]

component replication isn't controlled by LifetimeReplicatedProps. At best that controls the replication of a reference to a component, but not the object itself.

You can either call AActor::SetReplicatedComponentCondition or override UActorComponent::GetReplicationCondition on the component itself.

[obsidian cargo]

Oh really? Wow I misunderstood how that worked. Thanks for the clarification!

[obsidian cargo]

How does that work for structs (IE Fast Arrays) or non-component UObjects?

[hollow eagle]

structs aren't components

and UObjects aren't replicated via properties referencing them, period

they're replicated via either the ReplicateSubobjects method on an actor or the newer replicated subobject list (also on actors).

[obsidian cargo]

Thanks for the clarification!

[solar stirrup]

Actors aren't guaranteed to replicate to all relevant connections at once right?

Is there a way to make sure a property gets replicated to all connections at the same time?

[hollow eagle]

there are zero guarantees possible about when something will be replicated

[fossil spoke]

There is no way to guarantee they will arrive at the same time.

[hollow eagle]

even if you managed to get unreal to send a change out at the same time you can't guarantee anything about when someone would receive it anyway

[solar stirrup]

Figured

Trying to think of a way to replicate something viably

I have states that may succeed each other

Or just like run super fast on the server

Which means with normal property replication that the client might never know about it

Trying to figure out a way to replicate those reliably without using RPCs

Because some those do need to run on the client heh

[small grail]

Open level is totally a client action, right? If it is the server, something I remember is like you need to move the whole session to a new location(level) and bring clients to it.

[regal solar]

For anyone interested in testing Gamelift Anywhere, I've created a script that automates the process of connecting a local server to AWS Fleet. You can find the script on my GitHub repository:
https://github.com/zorigoo0128/GameliftAnywhereManager.git

[sinful tree]

Open Level can be executed on the server, but it'll disconnect all clients in the process. ServerTravel will bring along clients with the server.

[small grail]

Yeah, that's it. Usually you don't want to open level on server, if your client quit the session, sure, just open level on your client side.

[real ridge]

delay is there because of respawn Time every time I die I will respawn after +2 sec

[real ridge]

so how to fix it I don't fully understand sorry , when I was debugging yea spawn in game mode was called only once

[sinful tree]

Exactly. There is only one game mode and you're trying to execute a delay on it twice from the same event. You cant do that if you want a delay for each player as the delay prevents the execution of the first player spawning and then when you call that event again the data from the first player that is stored in the event is overridden by the second call of the event for the second player.

If you want to delay per player, then make the delay in their controller, and when that delay is finished you can call into your game mode if so desired to spawn them.

[vivid seal]

What kind of network emulation settings do you guys consider “realistic” to test for. For example, my custom root motion stuff works great at 200ms but at 1% packet loss on top of that I will occasionally get net corrections or doubling of certain moves. Is this normal or should things still be running smoothly? At what % packet loss and how much latency should I be able to play without net corrections

[small grail]

I think it is normal

200ms, god...

[thin stratus]

Imo, package loss is redundant to fix. You can check if your game collapses due to it but despite that you can ignore it

200ms is most likely the upper limit. 100 to 150 is already enough though.

Everyone with that or a higher ping won't be enjoying the game anyway :D

[small grail]

They should consider change the physical server area or check their network condition.

I won't complain any weird things happened if I've got 200ms lag.

[vivid seal]

Yeah I figured above 200 probably wasn’t really worth designing around, but wasn’t really sure with packet loss as I don’t know how much packet loss the average player has

[thin stratus]

Noob dev. Can't even fix 500ms ping. It's just half a second bro. Ai could fix it.

[vivid seal]

ChatGPT how do I fix 500ms lag???

[small grail]

You should check how google fix it for stadia using negative latency tech

Which I don't understand how

[thin stratus]

I recall enough games for a while actually kicked you

If you had a high ping for too long

Wonder if that practice is still a thing

[real ridge]

i get it there is only one game mode so it also wont work when I Will play with my friend joined my dedicated server ye?

i think I get your answer

thanks"

[whole pine]

how do i rpc a scene capture

[near granite]

log says like this when openning the packaged server. I don't understand what it means

[nocturne iron]

Is it possible to make a RPC non-sequential, or property replicate from client to server. I need to update positional information in a system where the client is trusted? (The data is positional information from an assisted outside-in tracking solution for a proprietary VR setup)

[upbeat basin]

What is a non-sequential RPC?

[real ridge]

@sinful tree it fixed my problem! thanks I did not realize that this is problem

[solar adder]

hi! i have another question about replication. I spawn a replicated actor on the server with replicate_movement=true. It moves based on tick. When i change the movement speed for it on the client (switch_has_authority=remote) i expected it to be laggy due to network corrections (p.NetShowCorrections 1), but in reality the server and client versions just go out of sync with no corrections.
When i try the same in clean 3rd person template for 3rd person character (changing max walk speed locally), i see the server corrections.
Do there corrections happen out of the box only for character/projectile movement components?

[near granite]

Sublevel set visible also should be done from server to multicast ?

[small grail]

Usually you don't replicate movement

[nocturne iron]

By default RPC is sequential, but I need it to function like UDP datagram- the messages should be processed when they arive, not sequentially :)

Not sure if this is a property of Unreliable?

[whole pine]

no one knows how to replicate a scene capture eh

[chrome bay]

It's not. If an unreliable arrives at all, it's still processed in call-order. Nothing you can do about that

Not really sure why the sequence matters, you can send Unreliables to the Server from a Client without problems. Not sure why you would want them to be called out-of-sequence...

[rocky kestrel]

This is happening in gameInstance

And this game mode

Should I put delay to beginplay so server would be created first? Or should I put create advanced session to game mode?

Or is this okay?

[nocturne iron]

It's a bit of a special case, but we have a lot of user on the same wireless network- so package drop is high and synchronisation does not help.

[upbeat basin]

As Jambax stated, I guess making them unreliable is only optimization, with vanilla engine at least, you can have here

You don't make any difference on sequence part, but at least you don't need to force the packets to arrive since there will be another update sooner or later

[upbeat basin]

If net mode is guaranteed to set on the GameInstance::Init (I'm not sure if it is or not) I don't see any problem here unless you need to save file part to work exactly after session is creation. If you need to though, then I would put the save file part on the OnSuccess pin of CreateSession node, whether they all be on GameMode or GameInstance

[rocky kestrel]

Does create advanced session work properly in game mode? and save stuff basicly loades all player made buildings and players data so I think sessions should always be created before?

[torpid girder]

i am looking at my server, i see it listening on tcp ports and udp, should i open up all these ports?

[chrome bay]

Just mark them unreliable. That should be enough. You can't force RPC's to execute out of sequence either way.

Unreliables will not be resent anyway

They're either received and processed or they aren't

[upbeat basin]

It can work from anywhere as far as I know

Also if you're not working with listen server and have a different logic for that, you don't need to check if you're on dedicated server for GameMode

GameMode won't exist on any other machines executables anyway

[rocky kestrel]

I am creating Rust like game so only dedicated servers

[rocky kestrel]

If I want to keep create session on instance init. Would it be okay if I cast to gamemode and call custom beginplay event from success?

[upbeat basin]

If you mean a custom function/event by custom beginplay event, sure that would be fine as well

[solar adder]

i see. But what about network corrections, when does it kick it? Lets say i have an actor out of sync, can i somehow force it to be corrected? And why doesnt it happen automatically only for 3rd person character for example?

[upbeat basin]

I think the second answer you're looking for (why Character makes it automatically) is because CharacterMovementComponent, that should be the one handles validness and corrections for the movement

[pine cipher]

does advanced sessions work rn on 5.1.1

[rocky kestrel]

Working on me atleast!

[pine cipher]

so you have to working not using lan?

[rocky kestrel]

I have working dedicated server and it works. I can even see my server on steam public server browser

[rocky kestrel]

.

https://www.youtube.com/watch?v=tBWwGlUiLrw&ab_channel=OfficialNoms

[nocturne iron]

Where is the correct place to populate GameState properties that resides in the GameInstance on map load?

It need to be replicated before client pawn spawn, and set before server pawn spawns.

Is InitGame too early?

[chrome bay]

Earliest possible place is AGameMode::InitGameState, or you can just override gamestates PostInit / PreInit functions

Zero garauntee it'll replicate before the client pawn is received

[nocturne iron]

Is InitGameState before or after InitGame?

[chrome bay]

Don't know, InitGameState is called from PreInitComponents

[nocturne iron]

Think that's before

[chrome bay]

You have no garauntee the gamestate will be valid when your pawn is received on a client though either way

Replication order between actors is never garaunteed

[nocturne iron]

How is default map classes replicated then?

[chrome bay]

Like any other actor

They arrive whenever they arrive

[nocturne iron]

Hm

Guess i will just have to OnRep then :)

[chrome bay]

OnRep or use callbacks if they exist

UWorld::OnGameStateSet for instance

[nocturne iron]

Right, but it's a property on the GameState

[chrome bay]

Unfortunately on the Server, that's before InitGameState. Utter genius design from Epic

[nocturne iron]

Then i would have to create my own callbacks

Hah xD

[chrome bay]

The only thing you do know for certain is that BeginPlay() isn't called until the Game State is received

But I don't like initialization in BeginPlay so 🤷

[nocturne iron]

Yeah, I don't ether.

But InitGameState + OnRep seems to solve my issue :)

Thanks

[torpid girder]

hello, other than opening up udp/7777 should i open the tcp port that my server seems to be listening on?

[silent valley]

Depends on the online subsystem you're using.
If using NULL then just the port you're listening on is fine.

[torpid girder]

I am using redpoints eos plugin

[silent valley]

I don't know about EOS. Maybe the docs list other ports?

[torpid girder]

oh i was just asking here as i had been reading and i saw the server listening on tcp ports

[silent valley]

you might want to ask the #epic-online-services channel

[dark wing]

vivox is deprecated?

[grizzled stirrup]

if (GetRemoteRole() == ROLE_AutonomousProxy) Can never be anything but human players right?

As in can't be AI controlled characters

[robust linden]

how can I make my 1st person character have a visual representation for other players like a 3rd person character?

[teal fog]

I've got one humdinger of a replication problem here. Preface: UE 5.2 BLUEPRINT PROJECT (except for an extended character movement component). I suspect the answer will be "swap to C++", but that's no obstacle.

Players pick up and put down objects in this game, which are physics-enabled on the server (yeah I know.) The replication of object parenting and referencing works flawlessly, this is a purely visual bug.

When a client player "drops" an item (which clears its ownership and detaches it from the actor, no other network related effects) sometimes a bug will occur where, on the LOCAL CLIENT ONLY, the object snaps back to it's original position it had before being picked up. From that position any local effects will be applied to it, such as force impulses. After the client receives fresh data from the server, the item will "snap" to where it should be and play continues without issue. Note that on the server, everything looks fine - the player releases the item without issue from where they are standing.

This bug is not consistent. I can pick up-drop items for 60 seconds straight without the bug happening, and then it will occur again.

I've tried Net Relevancy, Net Dormancy, disabling Replicate Movement on the client on pickup, on drop, everything in between, and nothing will fix it. It happens on 500ms ping, 250, 50, editor-launched windows, packaged builds, everything.

Anyone have any ideas?

[chrome bay]

Sounds to me like the client is changing the attachment state locally. They then receive an interim update from the server, so it snaps back.

The Server is the one which should manage attachments and whether physics is enabled or not. That info will replicate to clients automatically so long as replicates movement is enabled.

[teal fog]

Interesting, I wonder why that update would cause it to snap to the position it had before being picked up?

[chrome bay]

Because the client is manipulating something locally that is server-controlled

They get an interim update from the Server, which breaks the client-predicted change, then a short time later it resolves

[teal fog]

The server does the item attachment as well, like I mentioned the server has the object where it "should" be the entire time

[chrome bay]

All attachment/physics should be set by server, client shouldn't do anything

Just attach/replicate and make sure Replicates Movement is checked on the object.

I can't say for certain, but it sounds to me like the client is changing it as well

When a client player "drops" an item (which clears its ownership and detaches it from the actor, no other network related effects) - to me this reads as the client detaching it, not the client telling the server they've dropped it, and the server detatching it

[teal fog]

It happens on both, the client runs the "drop item" for local responsiveness and the server does it when it gets the RPC

[chrome bay]

That's why it breaks

You drop it locally, you receive an interim packet from the server which reattaches it breifly, the server receives the RPC, sends the new update which then detaches it again

Higher latency will make it more noticeable

[teal fog]

So I should do the local item drop with a dummy item for responsiveness

[chrome bay]

Don't do it at all IMO

If anyone is playing the game with 500ms lag and complaining about responsiveness that's their problem

[teal fog]

That's somewhat my thought process as well

Interesting

I still don't get why the server's interim packet causes the item to go to the pre-pickup position, but I'll give it a shot

[chrome bay]

Why pre-pickup IDK, but it just sounds like server/client fighting over stuff overall

[teal fog]

That's what I thought it was as well

Am I incorrect in assuming that disabling Replicate Movement on a client tells the object to stop listening to updates from the server?

[chrome bay]

Meh.. it's complicated. Replicate Movement is itself a replicated property, so realistically it shouldn't be modified by a client. If you disable it, the client will not do anything when it receives non-attached replicated movement, but it DOES apply attachment replication.

Server is still sending updates regardless

The real problem however, is when you enable it again, the client won't update to whatever last replicated movement state was replicated, so that client will be out of sync.

Until it moves again on the Server, that is

if you were in C++ you could apply it, since you still have the data - but not in BP

[teal fog]

That makes sense. I think what tripped me up was the separation between attachment state replication and movement replication. Makes a lot more sense now, thank you

[twilit radish]

To my knowledge, and with a bit of looking around in Cedric's guide and the Unreal source I only see it being used for actual players yeah. Not AI. I also wouldn't quite see why AI needs it anyway as it can never be directly controlled by anything else than the server if we are talking replicated pawns.

Sure you can influence decisions it makes through RPCs but ultimately the behaviour tree and all that stuff are not available on the client 😛

[twilit radish]

I believe the common way is to have two (skeletal) meshes. One for first person and one for third person. The ones you don't need you can just make invisible locally on a device. So for the character you're controlling you can just hide the 'third person mesh' and and for other clients you hide the 'first person' mesh. Not exactly the most clean thing but whatever I guess. You can if you're really worried about the components existing just dynamically add / remove the components as well.

Maybe that you can also use a single component (assuming both your first person and third person meshes are for example skeletal meshes) and just locally change the mesh on it but I'm not quite sure how well that works I'll have to say.

[grizzled stirrup]

Thanks! It's more for movement interpolation stuff, I want to make sure only clients are interpolating and these changes won't affect server controlled characters

[robust linden]

That would make sense yea

Tho yeah idk changing the mesh hmmm

[twilit radish]

The biggest problem that popped up in my head with only having a single component is when you're for example using a listen server. Maybe your game in specific requires hitboxes for your character, then you get the problem that the listen server doesn't have a 'third person' mesh any more and then things can definitely get messy.

Maybe that in specific doesn't matter. Not sure, but then again I don't know your game. I listed it anyway 😛

[dark edge]

Depends on a lot of stuff, but it mostly boils down to detecting whether you're the local character or not (is locally controlled), and changing stuff based on that

swapping out meshes, making 1 mesh visible, 1 not, whatever

[whole pine]

how do i rpc a scene capture

no info on the internet

im leaning towards getting item info struct of equipped items on a player i click on

and showing those on the scene capture player mesh

[short arrow]

I'm not exactly sure what you're trying to do. But I don't think you would RPC that.

You'd RPC what it is you wanted to screen capture

[whole pine]

just replicate it in general

[dark edge]

you don't rpc the scene capture

you rpc the data required to do the scene capture

[whole pine]

ok since my equipped and unequipped items are rpc'd

[dark edge]

they should be replicated but yeah

[whole pine]

can i line trace on a client or something and get theyre equipped items?

[dark edge]

sure

[whole pine]

is that possible with one click?

[dark edge]

line trace -> hit a character? -> get their items

assuming their items are replicated data then sure they'll be there

[whole pine]

ok cool,

im pretty overwhelmed with this task cause idk to what extent it will work without a server

[dark edge]

if they're not replicated data it'd be more like:
line trace -> hit a character? -> hey mr server, i'd like to see this characters items plz (this is an rpc)
later........
OK client, here's the items you wanted to see (this is an rpc) -> ???? -> profit

how are you doing multiplayer without a server?

[whole pine]

just using 2 clients in editor

[dark edge]

there is a server

its running in the background

[whole pine]

so whatever is happening with 2 clients in editor is the equivalent to a real server?

[dark edge]

are you launching the play in editor session as multiplayer with 2 clients?

[whole pine]

yea

[dark edge]

then yeah there's a server in the background they are connecting to

[whole pine]

if i dont use run as server but i use 2 clients instead. is that still a server or no

[dark edge]

show your PIE settings

you're either running as multiplayer with the 2 clients connecting to a background server or you're just launching 2 instances of the game which are each effectively single player, depends on how much you fucked with the settings lol

[whole pine]

and net mode is on client

[dark edge]

yeah that's doing server, client, client

[whole pine]

phew

[dark edge]

both clients connected to server

i mean can you see the other character running around?

[whole pine]

yes

i just didnt know if that was true replication or not

[dark edge]

it is

basically you pretty much have 4 modes a game can be in

standalone (local player, not open for connections)
listen server (local player, open for connections)
dedicated server (no local player, open for connections)
client (connected to listen or dedicated)

[whole pine]

oh ok thanks

speaking on that line trace method mentioned above, i know this isnt the right channel to ask but im in top down game mode with one universal camera for all players and i was curious what location settings apply to that situation for the line trace

nevermind, i think i can just use get hit result under cursor node instead

[robust linden]

well the hitbox (capsule component) remains the same

so I guess I need two meshes? But now what about animations, when I want to play a montage, do I do "if IsLocallyControlled() -> Play First Person Montage else PlayThirdPersonMontage?"

[quasi tide]

Pretty much

Need to play the right anim based on if it is first or third person.

[twilit radish]

As in plenty of games use hitboxes specific to their character. In for example shooter games it's a pretty common thing to do. But besides that they still have the capsule purely for movement based collisions.

[robust linden]

oooooh so that's how I can get accurate hitboxes

[twilit radish]

To my knowledge that's the most common way games do it yeah. I believe all they do is attach colliders to their characters. So if you for example want your arms to have collision you can attach a capsule collider to something that moves along with the arm, which often are the bones of a skeletal mesh so that if you have different animations they still move along with the animation.

This is what CS:GO for example does. And obviously it doesn't have to be as accurate as they do it here. But you get the general idea of how this can be useful.

[rain condor]

Player return invalid idk why

[robust linden]

daaamn feels so cool to see the hitboxes

[twilit radish]

What is invalid? In general if you're asking questions on servers like these I would suggest providing more information if you have a problem. Things like errors, explaining what exactly doesn't work etc. 😉

[graceful flame]

So by the looks of it shooting at the groin should mean inflicting the most damage because your bullet penetrates multiple hitboxes....hmm interesting.

[twilit radish]

As someone who played CS:GO for some bit. I don't think that's how they do it. Pretty sure it's just "you hit a player" as long as you hit one of the colliders. You do have bullets that can penetrate through objects like doors etc. though. But it mostly depends on what kind of weapon you use.

[rain condor]

Player it's not valid. I wanna replicate attach actor

[twilit radish]

Although I would find it pretty funny if that would be a thing though, Lawlster x)

[graceful flame]

Where did you Set the Player variable?

[rain condor]

I made a function to set it and i called it on begin play main character

[whole pine]

this worn items variable is replicated, if i click on another client using the get hit result under cursor node, is it able to detect the variable from that specific actor i click?

[dark edge]

Protip you don't want to attach colliders to your skeleton at the BP level. Skeletons can just have simple collision like that. Physics asset.

[graceful flame]

If you add a breakpoint on the initialization node does it reach it?

[dark edge]

Yes

[whole pine]

doesnt seem to be working

[dark edge]

Replicated just means that yhe variable on the client will be kept in sync with the servers version

[rain condor]

Yep

[dark edge]

Debug then. Figure out where in the logic chain it doesn't look right.

[whole pine]

how did i get this pass reference in message form? cause i cant get it anymore ?

[robust linden]

what

[graceful flame]

okay then if you step through you can pinpoint where the issue occurs

[robust linden]

skeletons can just have simple collision like that? What do you mean?

Physics asset?

[dark edge]

The skeleton itself can have colliders for the bones. That's what you want to hit test against , and is also what does the physics for ragdolling.

[dark edge]

That's an interface message.

[whole pine]

ya but if i get the same node it doesnt come in message form anymore

[dark edge]

Does that matter?

[whole pine]

i thought it might

[dark edge]

Idk what the difference is anyway, is that node from pre-5.0?

[whole pine]

no

[rain condor]

srry i don't understand

if i continue with execution breakpoint don't call anymore

[rose turret]

does anyone have a good explainer about Iris that breaks down exactly what it is? all of the docs are like, "it's multiplayer but better" but I'd like to understand architecture/goals/etc.

[graceful flame]

You can mouse over the output pin variables to see the state as you step through (F10) the nodes one by one. Check the variable after the node was executed or while its stopped on the node not before.

[rain condor]

Yep, the problem it's i get not valid player

Initialization it's working

[graceful flame]

Yea so then the problem is something to do with setting the player variable. Try changing how or where you set that variable.

[bright tiger]

Is it necessary to mark input functions like MoveForward in a character as Server to better security?

[rain condor]

I called it from event tick on main character

And it works

[graceful flame]

uh oh....at least use a DoOnce node

[boreal wadi]

When using the Push Model is NetUpdateFrequency taken into account at all or can I just set my NetUpdateFrequency to the lowest value and have all of my variables send updates manually.

[fathom aspen]

Yeah ofc it is taken into account. Push model only saves you the comparison done to evaluate if a property needs to replicate

Lowering net update frequency with ForceNetUpdate works

Using dormancy along with flushnetdormancy also works and is far more performant than the prevoius two

[rose turret]

Is there a quick TL;DR about how it does that?

[fathom aspen]

The only one I know of is in PushModel.h I guess?

[twilit radish]

Also an important note is that even when using push model there are still things that don't use it I'm pretty sure. Maybe that it has meanwhile become a lot better, not entirely sure. But a quick search result on Github in the 5.2 branch still shows me variables that don't support it.

[clear island]

so when you mark a property dirty, its not immediately replicated? its only going to be replicated on the next net broadcast tick?

[fathom aspen]

Indeed

[clear island]

oh interesting, TIL

[twilit radish]

Unreal still has a priority system to prevent overflowing the network or specific client connections. Push model doesn't change that.

[latent heart]

Not even the next broadcast tick. It'll only update if it's that actor's turn to replicate.

Or whatever the correcte phrasing it.

Even "Force net update" doesn't actually force a net update.

It just sets the last update time to zero.

[dark wing]

Damn, typical unity work

[fathom aspen]

Indeed, not next tick but next tick the actor is taken into account @clear island

I missread

[clear island]

yea thats what I meant

[latent heart]

I may have also misinterpetted, but I wanted to make it claer!

[clear island]

I used the wrong phrasing

[fathom aspen]

Because if not it will mean immediately

Immediately is always next tick xD

[clear island]

well yea, but when I said "Immediately" I was thinking in similar fashion to RPCs

but I guess not, it still follows the whole replicated property lifecycle

[fathom aspen]

RPCs take a different path, well at least those that are not unreliable multicasts

[clear island]

yea reliable ones

[fathom aspen]

And yeah they are indeed fast, at least from my experiments

[clear island]

you mean RPCs or push model props?

[latent heart]

Do unreliables not get pushed out straight away as well?

Even if they aren't checked for delivery.

[fathom aspen]

Unreliables that are multicats are queued for the next net update

[fathom aspen]

RPCs

[latent heart]

I see!

[twilit radish]

Honestly I don't really know if push model is even worth it. I thought I read at some point that Epic them selves said there was basically no improvement to performance with it enabled?

[clear island]

ah, yea I thought so

[clear island]

yea its stated on the header file

however it really does depend

for valorant that was like their number 2 heaviest thing server side

but they also wanted to host multiple games on one single core

so for them, it mattered alot

[quasi tide]

@fathom aspen Have you explored Iris yet?

Or have you not because you are "working"

[clear island]

they replaced all replicated props with RPCs, even stateful stuff

just to avoid the long delta times when comparing props

(this was before the push model existed in UE)

[fathom aspen]

Nah not yet tbh, we're still back in 5.1 with a few changes from 5.2

Maybe in the next project I'll do 😛

[quasi tide]

https://tenor.com/bj7vy.gif

[twilit radish]

Right. But Valorant in specific is already a lot different in that regard than most games. I would imagine they have very high tick servers because of the genre of the game right? Which I would assume indeed starts adding up to constantly check all their replicated properties. But I honesltly doubt that if even Epic says it barely did anything for their own use cases that most games will gain any benefit from it.

[twilit radish]

Wizard is slacking off at work 🥁

[quasi tide]

Confirmed

[fathom aspen]

Yeah gotta crunch hard you know

[real ridge]

it is worth to move multiplayer project from 5.0.3 to 5.2?

it's using eos

[fathom aspen]

Not if you don't want a more stable iris?

Okay that's a personal opinion

[clear island]

again, it depends, for valorant yea they have 128 tick servers to it really matters alot for them but even if your game is not valorant it may also be important if you are using dedicated servers and dont have the funds to buy super powerful machines like epic

[real ridge]

idk need read about it idk what is iris

[quasi tide]

Don't worry about iris until Fortnite is actually using it

[twilit radish]

If you have the funds to support that high tick rates AND dedicated servers honestly I can't imagine your team isn't able to put it together them selves if it's such a bottleneck.

[clear island]

in my experience these past few months from profiling dedis, the heaviest stuff is, in this order:
1 - animation
2- CMC
3- delta time comparisons for replicated properties

[fathom aspen]

Epic got you covered, you will barely find anything about it 😉

[real ridge]

animation means niagarra?

[clear island]

yea, for example my game uses dedis and runs at 66ticks and after optimizing alot on animations I'm able to run it smoothly on cheap servers (like 12usd cheap)

[fathom aspen]

Yeah CMC is the bottleneck
Animation montages from the ASC as well

[clear island]

no, skeletal mesh ticking

[real ridge]

because I used niagarra instead actors meshes to make bullets and all effects when shooting or doing anything like this in game thinking that I will make better performance

[boreal wadi]

Is that "Taken Into Account" the net update frequency?

[fathom aspen]

Yes

[twilit radish]

Just don't use animations. Easy solution ^^

😛

[torpid girder]

Hi, I am trying to transition out of spectating, I am using gamemode the code worked in gamemodebase so something is getting in the way

[clear island]

yea in my experience skeletal mesh ticking is much much heavier than CMC, I havent had to change anything with the CMC yet but will probably have to happen at some point because I'm aiming for max 100 players 😄

[fathom aspen]

Use animation materials you mean to fake your animations, I like it

[real ridge]

can you give me tip how I can spectate game or my exe version of game and find which parts of game causes FPS drops or lags or takes performance?

[twilit radish]

Totally what I meant yeah! Glad I was able to provide so much help 😆

[fathom aspen]

RIP

[magic helm]

I recommend using Unreal's profiling tools and use the Unreal Insights tool

[twilit radish]

Although without joking if you're using something like mass those material animation techniques can actually save you a TON of performance. But maybe not the best topic for #multiplayer 🙃

[clear island]

no joke I literally did this, in my game, server side (dedi) there's no animations

[fathom aspen]

Seconded. Pls no net profiler but net insights, pls

[clear island]

I only tick the animation poses when necessary

[twilit radish]

NewK — Today at 22:20
yea, for example my game uses dedis and runs at 66ticks and after optimizing alot on animations I'm able to run it smoothly on cheap servers
🤣

[magic helm]

For most games, the biggest CPU bottleneck is animation

[clear island]

yea it really was a pain to get right, especially with lag compensation doing the rewind back to a time where the animation wasn't ticking

but it was worth it

previously just 2 players on server caused the cpu to load at 80%

now its at 18% to 20%

[twilit radish]

That sounds like a rather odd jump to me for only 2 players 🤔
Not saying it couldn't be the case but again that sounds like a very extreme performance change for just two players.

[clear island]

the map also had alot of vehicles which are skeletal meshes and were also constantly ticking

I disabled the animations there too

[twilit radish]

That seems like an important detail to mention in this scenario no? 🤣

[clear island]

sure, but my point is that before, with all the vehicles + 2 players, the CPU was 80% load

but even on the profiling tools, the vehicle ticks didnt really show up alot tbh

it was mostly the players

because they have alot of child components attached to the skeleton bones

and constantly ticking that animation would update transforms on all those child components too

[twilit radish]

Do you happen to know what the load was with no players before changing all the animations?

[clear island]

that I dont know because I already had code in place that just disabled the vehicle ticking when there were no players on the server

all I know is from the profiling I did, with players inside the server is that the player animation ticking was always the top offender

[quasi tide]

That's probably why they're investing so much into animation performance

[clear island]

which kinda makes sense, valorant devs also reported the same issue for them

the heaviest thing was animation ticking

2nd was the replicated properties

[half umbra]

Pitch works correctly
but Yaw
not
Client doesn't see Server Yaw
on Client always is 0.0
why?
Get Base Aim Rotation is replicated

[thin stratus]

Iirc BaseAimRotation is just the Pawn's Yaw.

If you expect a different one it might be due to that

Best to check the C++ code behind it

[whole pine]

im setting the specific controller of the client i click so i can use it as object input when i cast to my pawn bp in my scene capture bp cause if i have the object input on the pawn cast as 'get player character 0' it only shows one players equipped items but i have to cast to my player controller bp to get the variable in the picture with object input as 'get player controller 0' so what should i do

[dark edge]

you don't have other player's controllers on your machine

[whole pine]

even if im getting hit result under cursor and using get controller node?

[dark edge]

#multiplayer message

[whole pine]

when i click on another client

[dark edge]

on a client, the only playercontroller that exists is your own

[whole pine]

oh ok

[half umbra]

i don't understand C++ ;/

[whole pine]

so how do i identify the player i click using get hit result under cursor

[dark edge]

What data are you wanting to get about that client?

PlayerState for the actual player

[whole pine]

im sending the worn items variable off the client i click to the scene capture

[dark edge]

PlayerState represents the person
Pawn represents their character/other thing in the world.

What actor holds Worn Items?

[whole pine]

main pawn character

[dark edge]

ok so why do you need controllers etc?

just get the character you just clicked

[whole pine]

idk, i was tryin dif things

[dark edge]

is WornItems a variable in your Character class?

and is it replicated

[sinful tree]

BaseAimRotation only contains Pitch.

[whole pine]

yes and yes

[dark edge]

So is pitch the only component of control rotation which explicitly makes it to other clients and not indirectly by driving things like capsule rotation of character?

[whole pine]

just need a way to identify which client i click using the get hit result under cursor that casts to my character bp

[dark edge]

thats it right there

you clicked a thing

you check if it's a topdowncharacter

if it is, then get its WornItems

[whole pine]

in mmy scene capture bp i have to cast to my character BP

so im getting character 0

so do i promote this cast in the pic to a variable and use it as input object for the cast in the scene capture?

[dark edge]

don't get character 0 ever

why are you doing so much casting

do you know what casting means

[whole pine]

yea

[dark edge]

you sure?

[whole pine]

yea

[dark edge]

Show the part of your code that takes in a character and shows their inventory

I'm guessing OpenMyInventory just shows inventory for self, and OpenOtherInventory shows inventory for any TopDownCharacter, right?

[whole pine]

right

[dark edge]

so just pass the result of the cast after the hit into OpenOtherInventory

show the internals of OpenOtherInventory

[whole pine]

its a disaster

[dark edge]

I think you're making this way more spaghet than it needs to be

[whole pine]

i grew up on spaghet

[whole pine]

what do you mean by this

specifically

[dark edge]

I want to see what OpenOtherInventory does with the passed in character ref.

[whole pine]

cause i have rep notify's for showing items on players

[dark edge]

This is to inspect some other character right?

[whole pine]

im getting open other inventory from the character bp cast

its not a ref pas

pass

it just opens a widget that is different from the owning player inventory widget

[sinful tree]

To be honest, I'm not sure XD
I was just looking over the code, and it looks like it actually uses the actor rotation if there's no controller, and if there is no pitch, then it uses BlendedReplayViewPitch or RemoteViewPitch.

[dark edge]

What bit of code spawns the widget?

where does that code live

[whole pine]

all im trying to do right now is make the scene capture know which client i click on

cause im getting worn items array from the character cast off the hit result of get hit result udner cursor node

[dark edge]

that's the pawn you clicked on

you clicked on a thing, it was a BP TopDownCharacter

[whole pine]

i get the worn items and then send them to the scene capture

[dark edge]

You're trying to set a replicated variable clientside

we need to see what OpenOtherInventory and TryEquippingOtherPlayersItems do

but anyway, those should not be separate from your own versions, doing it on self should just be
OpenInventory(self)

make the function once, call it with a parameter of self for the self case

[whole pine]

self inventory and other inventory are 2 dif widgets

this is try equipping other players recorder items bp

this is scene capture bp

as you can see since its on player 0 it can show only one clients equipped items

open inventory events just create inventory widgets, thats it. the main target is just the image within the inventory widgets which is bound to the scene capture material

so my main problem here is just identifying which client i click on and send the scene capture that player info

@dark edge

[whole pine]

i put this in the scene capture BP but doesnt work

[bright tiger]

Is it necessary to mark input functions like MoveForward in a character as Server to better security?

[sinful tree]

If you mean marking a function as an RPC to run on server, then no. Marking as Server indicates you want to allow a client to be able to call that function to then run on the server, which in some cases, you don't necessarily want clients to be able to run those functions directly.

Eg. Marking a "Defeat" function as run on server could allow a client to call that function when you don't even intend for a client to be able to make such a call.

[bright tiger]

Then this talk of the wiki:

“Instead of letting a player tell the server their position explicitly, consider having the PlayerController send player commands (like move left, up, down) and simulate that state on both client and server and let the server update the player's position as a replicated property. This avoids an entire class of cheats (like speed hacks etc).”

What does it refer?

[sinful tree]

I'm talking mroe about your general question as to whether or not to mark something as Server to better security. The answer is no, that's not what it does. Marking a function as "Server" indicates you are opening a means for a client to send the server an instruction and you can pass along data in that function. If that function gets called, then the server will be executing it.

SO... If you need to have the client tell the server to do something, then you must mark the function as Server in order for the client to be able to call such a function, however, you do not need to mark a function as "Server" to have the server execute the function nor does it increase the security of it (the opposite actually) - the function can still be called at any time while you are running on the server.

In terms of what your wiki is talking about, imagine a situation where you are calling a function called "MoveForward" and you mark it as server but it has no inputs. This means you are asking the server to execute whatever "MoveServer" is but is not relying on any further input from the client. The server would end up determining what needs to happen and where to.

If you added a vector input named "DesiredLocation" to "MoveForward" and had it marked to run on server, then you're passing that DesiredLocation from the client to the server in that function call. If you set it up so the server then uses "DesiredLocation" and moves the client to that location without performing any checks, you're now trusting the value that the client sent, which may not necessarily be what should happen and could result in a player teleporting themselves anywhere on the map.

[glass orchid]

Can i call a playerstate's server RPC from a widget?

[sinful tree]

If the local client is the owner of that playerstate, yes.

[glass orchid]

awesome, thank you!

[bright tiger]

Thank you a lot for the deep explanation.

Then, my questions are:

• Character class requires this sort of RPC method to prevent the client moving forward to another location?
• By doing such crucial, high speed things like moving forward or rotating, as RPC doesn’t slow everything up? Is it recommended to execute a “locally” move forward while the servers respond the result?

[sinful tree]

The character class does not require an RPC to move as the Character Movement Component handles the RPCs for you. There is client-side prediction of movement in it that smooths out the movement for you, and if the server doesn't like how you've tried to move, it'll correct the client's view to the correct place. So then it's just Input > Add Movement Input and that's all you need.

[bright tiger]

When you call an RPC, the code doesn’t await for it right? Jump straight to the next line?

[sinful tree]

Correct

[bright tiger]

And my last question, does Pawn class also handle RPC for AddMovementInput and similar?

[sinful tree]

No. AddMovementInput while part of the Pawn class has no implementation of it.

[bright tiger]

Thank you so much!! Appreciate it!

[whole pine]

anyone know: #ue5-general message

[keen hound]

how do I create a dedicated server browser?

[latent heart]

Generally you'd add it to your main menu map somewhere.

Interface with steam or eos or whatever online subsystem you're using to query the available servers.

And display them.

[keen hound]

okay, and how would I set a server port?

[latent heart]

The server details will be available from whatever online subsystem you are using

[keen hound]

@latent heart are query port and multihome commands in ue5?

[keen hound]

yeah I know it's spaghetti, I'll get it sorted soon lol @sinful tree

[sinful tree]

Not much you can do with maps if ya need to check if the values are there... It is what it is XD

[keen hound]

they are on a command line

I use a shortcut

[half umbra]

so how can i get Yaw? Need I create replicated Yaw in Character?

[rocky kestrel]

I have 60 players "MMO" game and I have been using local dedicated server. Can I use playfab server just to upload my server there? Without any other integration with playfab. I would use steamcore for server browser and session.

[latent heart]

I have no idea, sorry!

[twilit radish]

They mention you can try out their service if you're interested in it: https://learn.microsoft.com/en-us/gaming/playfab/features/multiplayer/servers/
If Playfab seems interesting for your game you could try looking at that I suppose.

As a PlayFab customer, you can access our service and use a limited, free quota of multiplayer servers for product evaluation and testing.

[rocky kestrel]

That is great!

[fervent hazel]

What am i doing wrong? why is the gamepad not controlling the second player`?

[shadow hatch]

im working on tracing / overlap detection for the purposes of dealing 'damage' in my project but somehow the tracing is not quite working when running client / dedicated as opposed to standalone or listen server

the trace is based on two sockets on a static mesh

but its meant to look more like this

as if the static mesh, the sword, is stuck in the air and the only reason the tracing moves at all is cause the anim montage is using root motion, driving the character forward

[shadow hatch]

after hours of digging looks like i needed to enable this on the character skeletal mesh, otherwise it seems as if the character is basically tposing as far as the server is concerned or something:

im guessing having this enabled the whole time might not be a good idea? would it be beneficial to have it only enabled when its needed

[dark parcel]

do PossesedBy only called on Server?

[shadow hatch]

it is yeah if memory serves

[dark parcel]

There is option to not tick animbp too, I think those are options for optimisation

In my case, I was woundering why my anim notify never get called 😦

turns out when not rendered the anim bp doesn't play the montage because of the option

i set it to always tick then it plays

[pallid mesa]

There will be a new visibility based anim tick option in future versions of the engine for this 😉

hopefully!

[shadow hatch]

oh okay. i suppose just enabling disabling refresh bones on dedicated seems to be a decent workaround, no?

[pallid mesa]

dedi servers by default dont refresh bones

its a hugeeeee optimization

refreshing bones will add some considerable cpu time to your dedi server

[shadow hatch]

another workaround is placing collision boxes by hand inside each anim montage, i think thats how the one triple A unreal game does it, i think...

[pallid mesa]

well... there are several techniques

that can go from doing a sphere trace on the frame of the hit in front of the player

to more complicated solutions based on how arcadey your game is

[shadow hatch]

i wanted to try go for as much accuracy as possible sort of

[pallid mesa]

doing the hit on authority relying on bone positions will.... not be accurate at all

as soon as you have some lag, I mean

[shadow hatch]

hmm.

[pallid mesa]

you can maybe go for a client side approach that you later verify... when it reaches the server

[shadow hatch]

well the problem is

i was detecting hit clientside until i added ai

thats when i suddenly had to rethink stuff

[pallid mesa]

ah I see 😄 u want AI to be accurate

[shadow hatch]

i suppose i dont mind if the ai isnt super accurate but

i want to make sure i dont get my wires compeltely jumbled by having too many exceptions just cause the ai or something else

[pallid mesa]

well you can have players to do client sided hits, and let the AI do its thing on the server

[shadow hatch]

yeah, that was the plan, i will separate them again

[solar stirrup]

Does AActor::PreReplication() get called server-side as well?

[pallid mesa]

just remember to think of some verification on the server for the client side hits if you are going to do some form of pvp

[shadow hatch]

im aiming for coop/single first but im building for the possibility of allowing dedicated down the line

which might have pvp i guess but even coop might

[pallid mesa]

ye

[solar stirrup]

based

[pallid mesa]

👉 😏 👉

[pallid mesa]

it is actually called server side

XD

(unless im not recalling it correctly now)

[solar stirrup]

iirc it gets called on the client too

or maybe im confused

anyway mostly needed it server-side so it's fine hehehe

[pallid mesa]

Called on the actor right before replication occurs. Only called on Server, and for autonomous proxies if recording a Client Replay.

@solar stirrup from docu

[solar stirrup]

ah

it's fine I have PreRepNotifies() iirc on clients

[pallid mesa]

what are you doin

👀

[solar stirrup]

I'm keeping history of states on the server to ensure they all get replicated to clients

regardless of if they happened for a split second server-side

so like if a state starts and ends in between replication intervals

[pallid mesa]

ah, i see yeah

[solar stirrup]

I just wanna clean up states that are X seconds old in pre-rep

I really didn't wanna use RPCs for this heh

but this will probably work fine

[pallid mesa]

!! gl erlite!

[solar stirrup]

tyty

[naive wind]

I've got this code here. MoveToCooker() runs just fine, but the server function (S_MoveToCooker) never runs. I have a feeling it has something to do with MoveToCooker() being called from a multicast delegate but im not too sure.

second image is the function bound to the delegate

god multiplayer is so confusing, so many different possible combinations of RPCs and owners its so hard to get it right

any tips or general rules of thumb for coding multiplayer would be helpful. Still a bit new to this

[sinful tree]

Client->Server RPCs can only be called on client owned actors.
Events like overlaps can trigger on client and server. That means you usually don't need a client telling the server that the overlap occured as the server will know about it already.

[whole pine]

how come client 2 gets correct values from worn items variable but not client 1

[sinful tree]

You have to check how you set your variables and what data you're feeding in. The code here has nothing to do with what values are set in your variables.

[whole pine]

i just realized its getting correct values but its not updating the scene capture on client 1

[quasi tide]

What always helps me is just thinking about which machine the code is going to be executing on and then switching my brain into that context.

[royal anchor]

Just making sure that I'm going about this in a some what correct way. When I have a listen server and I make a call from a client, like a basic attack, in real time that takes a second for the client to call that from the server and the server replicate that back to the client that it is attacking.
This feels awful as a client, especially while using less then average connections. Is it a better option to have the client play out that code while the server also does?

Purely cosmetic from client and actual coding, like damage etc. From server

[quasi tide]

Yeah, pretty much.

[royal anchor]

Okay so to make the client actually feel good to play is a pain in the ass lol

[quasi tide]

Also yes.

[whole pine]

WHY IS CLIENT 1 SAYING I HAVE 2 ITEMS ATTACHED IF THERES ONLY 1 AND IM USING GET HIT RESULT UNDER CURSOR, makes no fuckin sense

[icy jetty]

Did you try printing the items to see what is coming up?

[glossy kettle]

WHY IS SERVER SAYING I HAVE NO COMMIT WHEN I HAD THE CONSENT OF THE QUORUM

[north stone]

<_<

[real ridge]

Hello guys I have weird problem I am trying to let my AI shoot at me but I am getting failed cast on event for damage but very strange is that on the start of event I can cast check first photo when I cast there to my plane its successful but when I am trying to give damage after linetrace hit my plane here (photo 2) it fails and I See on my monitor printed cast failed...

any suggestions?

its in same line

[sinful tree]

There is no cast happening in the second photo.

If this is an AI controlled actor, you shouldn't need to call Run On Server RPCs in it, and if it can be client controlled, you don't want to allow a client to tell the server how much damage to deal and who the damage causer is.

Is the idea here that as soon as the AI sesnse a PFCPawn it does that linetrace and applies damage?

[real ridge]

i know but my server apply damage is printing that cast is failed ,werid

weird

[real ridge]

ye yea

[sinful tree]

So this bit is normally connected?

[real ridge]

ye I was just debugging 😄

it continues to line trace sorry for confusion

I am trying find problem why is damage not taken I have like 20 guns one AI turret in game and all works fine

same system here and it is not working lol

but on turret I am using ai perception here I am using pawn sensing

[sinful tree]

Maybe it's failing for the pawn type? It looks like you have the print here saying playerstate.

or am I just being somewhat dyslexic XD

[real ridge]

I am trying again , line trace works good I am getting casted print from the start

but this one still not workinng lol

[real ridge]

print is wrong my retarded ccolleague .... wrote mistake

😄

good point

[sinful tree]

Well, again, maybe don't mark that as a run on server event? If it's AI controlled it shouldn't need to be run on server, as it should already be running on server.

[real ridge]

omg I am putting damaged actor as owner

let me swap it

[sinful tree]

That'd do it.

lol

[real ridge]

will try too

no wtf why its printing cant cast to player I dont have anywhere this Print

its saying when server damage is applied

[sinful tree]

Perhaps you have some casting going on in the AnyDamage implementation in your DFCPawn class?

[real ridge]

Should take a look

yea bro thx found where is mistake coming from now fix it

D:

lol I did not get this idea

its in my plane

its like its getting wrong player reference

otherwise it would cast

but god why

bro I fixed it thx thank to you 😄

I was casting on any damage only to my players but damage causer was sentinel ( defense system) lol so it could not cast lol I Should refactor this

I Dont event cast there anywhere

idk why I did this

[signal lance]

@whole pineStop... there is no excuse for calling people idiots

Also @icy jetty that wasn't very nice of you either

[whole pine]

really cause people been passive aggresively doing it for a long time

guess thats the loop hole

[signal lance]

I will remind you of #rules
If you have an issue with someone report them

[whole pine]

i dont report, thats whats funny about this

[signal lance]

Throwing back insults at someone who insulted you instead of backing off or reporting them doesn't make you look any better than them

It's a childish thing to do

And I won't discus this any further

[whole pine]

i can argue its childish to report someone for something you do to someone else

[grizzled stirrup]

Does NumPublicConnections not include the host?

As in if NumPublicConnections is set to 3, it will allow for a 4 player game (the listen server host being the 4th player)?

[sinful tree]

Correct, the host isn't really "connected" in a listen server as their instance of the game is the server itself, so it doesn't really count as a public, nor a private connection.

[grizzled stirrup]

Thanks!

[twilit radish]

That would truly be something if you could disallow the host from "joining" because NumPublicConnections and the private one might have both been set to 0 haha.

[icy jetty]

Mb, will do

[tall mesa]

Hey all! First time posting, I apologize if it's the wrong channel for it. Anyone have any idea how to enable the on-character gameplay tags debug visualization? I've stumbled into it by accident several times, but there's a debug option SOMEWHERE that lets you see active gameplay tags as a GUI that hovers in roughly center-mass over each character during PIE. I can't find it on purpose for the life of me, but it was super useful to have on

It looked roughly like this where the active tag was hovering over each player

Edit: nevermind. I rubber duckied my way into finding it 🤦‍♂️
If anyone's wondering, it's the console command: AbilitySystem.DebugAbilityTags

[grizzled stirrup]

@twilit radish it seems on Steam it does actually count the listen server host as a public connection (subtracting 1 from NumOpenPublicConnections when the host creates a session) but not on the NULL subsystem

[twilit radish]

I never really had to use it for anything so far so I'm not sure. But that would honestly be rather silly..

But that's many parts of Unreal in a nutshell though xD

[grizzled stirrup]

exactly 😄

Does anyone know why LogOnlineSession: STEAM: Updating lobby joinability to false. gets called when the first player joins a lobby even if NumPublicConnections is set to something crazy like 50?

The only way around it is by setting SessionSettings->bAllowJoinInProgress = false; but in this case I would like it to work without doing that (as that causes other issues)

Sorry for the ping, did you ever solve this? I'm running into the same issue. I'm guessing that in the Steam code, the MaxLobbyMemebers is forever at 2 for some reason

make skin an OnRep var

[sinful tree]

Player Wants to Change Skin > Server RPC > Server sets skin value in OnRep > OnRep function called on clients > Have whatever needs to be done with the skin value done

[grizzled stirrup]

Yes! Late joining players will automatically call the OnRep for each other player so they'll all have their correct skins

You can do this wherever you like

Generally the player state is good to hold vars becuase your character may not always be valid, so the OnRep in the player state would then call the "equip skin" func in the character

[winged badger]

if the character Actor replicated by then 😄

a big assumption during loading in the world for the first time

[grizzled stirrup]

Right so you'd have both a begin play call in the char to update skin (via a PS getter) and then also the OnRep from the PS (when skins update in game if a player decides to change one)

[whole pine]

if 2 clients are joining a level, why does this spawn 4 of the actor if this is coming off event begin play

one for each player on both clients?

[winged badger]

because whatever this is, it has 2 instances on both clients

always catch the BP name in the screenshot btw

BeginPlay runs on every instance of every Actor on every client and server

regardless of who the owner is

[whole pine]

how come its not adjusting spawn location of the actor when it spawns, it just overlaps both

[winged badger]

no colisions, or replicated actor lands ontop of locally spawned one

[whole pine]

i turned off replication and on collision but still on top of each other

[whole pine]

im trying to use one scene capture for all players now and add to the capture whatever variables i get from the player i click on. the issue is, client 2 is last player to join the level so it is giving ownership of the scene capture to them. so whatever client 2 sees is what client 1 sees when they look at the screen capture

[whole pine]

if im playing in standalone, why are both windows seeing the same scene capture result

[winged badger]

scene capture should be done locally

[whole pine]

im trying to but idk how

gpt's saying set ownership off the spawn actor of class node

[winged badger]

actor doing scene capture is spawned by player controller, only if IsLocalPlayerController

that way each PC will spawn its own on a local machine and nowhere else

[whole pine]

this applies if im spawning it into a level?

[winged badger]

where else would you spawn it?

[whole pine]

?

theres no error i just didnt compile

idk, its still just only working for one client

[soft isle]

Hey! I'm having some trouble receiving data back through RPC calls. I'm punching way above my weight here, dabbling way beyond my skill level when coding to be honest, so hoping someone has the patience to help me understand how to work around this.

Basically what I'm trying to achieve is this: Server has a list of data related to players. On login, clients request that data, server sends it back, then the client presents some relevant info in the UI with said data. Other attempts at retrieving data has been successful (thanks to other posts in this channel I've stumbled upon), but turns out it's even more complicated when dealing with collections of sort. TSet and TMap is not supported, and TArray only works with certain setups (as far as I've understood even if it's a bit beyond my knowledge level is that it needs to be a const reference), so as a workaround for now I'm just turning the sets and maps into arrays server-side before passing it back to the client.

Code compiles, but when I hook it up to my UI the event I hook up my delegate to throws an error, twice, once for each parameter.
No value will be returned by reference.
So, blueprints can't work with const references it seems. What would be a simple but functional way to get the data I want from the server to the client?

Give me a moment and I'll fetch the code I'm using to make it easier to see where I could improve it.

void ABattlestruckGameState::RequestAllPlayerData(FReceivedAllPlayerData Callback)
{
    FGuid RequestID = FGuid::NewGuid();
    OnReceivedAllPlayerDataCallbacks.Add(RequestID, Callback);

    ProcessRequestAllPlayerData(RequestID);
}

void ABattlestruckGameState::ProcessRequestAllPlayerData_Implementation(FGuid RequestID)
{
    // PlayerDataList is a TMap<FName, FPlayerListEntry> housed on the server.
    TArray<FName> PlayerList;
    TArray<FPlayerListEntry> PlayerData;
    PlayerDataList.GenerateKeyArray(PlayerList);
    PlayerDataList.GenerateValueArray(PlayerData);
    ReceiveAllPlayerData(RequestID, PlayerList, PlayerData);
}

void ABattlestruckGameState::ReceiveAllPlayerData_Implementation(FGuid RequestID, const TArray<FName>& PlayerList, const TArray<FPlayerListEntry>& PlayerData)
{
    FReceivedAllPlayerData* Callback = OnReceivedAllPlayerDataCallbacks.Find(RequestID);
    Callback->ExecuteIfBound(PlayerList, PlayerData);
    OnReceivedAllPlayerDataCallbacks.Remove(RequestID);
}```

And even if there turns out to be a better way than to pass TArrays, I'd still like to know how to get arrays and such passed for learning purposes. Might turn out to be useful in the future.

[whole pine]

how do you make scene captures local

[winged badger]

you are making a copy of the delegate there and putting the copy in your callback list

i'd start with why would you log the player in, wait for its PlayerController/State.. .etc to replicate, then send an RPC from server to client to request the data

you know player just logged on, you know they will request the data, so might as well send it

worse yet, you can't send server or client RPCs through GameState

as the players don't own it

and what is the PlayerList for even?

just put your per player data as replicated data into their own PlayerStates and let it replicate on its own

[sudden harbor]

Does any replication need to be done for multiplayer levels?

[jade drift]

If I don't want players to be able to know when other players join/leave a match, would I have to disable PlayerState replication?

[soft isle]

@winged badger About to hop off the computer for now so I won't have time to test more right now, but to try and reply to some of the questions on my way out:

• GameState and RPC... hmm, yeah, that's totally an oversight on my end.
• As for the delegate being copied, I'll check back up with the other post here I used as a reference to see if I misunderstood them. I've used almost the exact same code other places in my project but instead of sending through a TArray/TMaps/TSet it send either simple data or structs... and those work flawlessly. If what I'm doing in regards to the delegate itself is a big no-no even if it works (in those other places) I'd like to learn why. This is unchartered territory for me.
• In a lot of cases, even if the data changes mid-game, a client doesn't need to know about the changes. So in general for those things I try to keep it to a "only send when requested" to reduce the traffic. It may be used for other things than login, so I still need the requesting itself to work.
• This system will probably be massively revamped at a later time, but for now I'm just trying to get this revision working so I can focus back on other places of the framework that need attention for now. Although, as said, even if it does get revamped I still don't understand how to send arrays through RPCs in general, and still hoping to understand how to achieve this in case it becomes useful for something else at a later stage.

[fickle estuary]

Having an Issue turning on the ReplicationSystemTestPlugin for Iris, getting a cannot open source file on the includes, all I'm trying to do is run the plugin, haven't modified anything on my end

[naive wind]

If I set an actor’s owner on the client and NOT the server, can I execute server RPCs on that actor from the client?

[hollow eagle]

no

[winged badger]

what binaries are you building?

NetworkAutomationTest sounds like it shouldn't exist unless there is an Editor in the name

[sonic obsidian]

Hey guys i was wondering if using world partition in a multiplayer game is a good idea ive done some research but i was wondering if anyone here would know if using it is a good idea the way im going to do it is use the tool to convert my level to world partition but just curious if its a good idea

[gloomy zealot]

would it be possible to use LAN+LogMeInHamachi/Radmin instead of a online subsystem?

[twilit radish]

No clue what it provides. If you're asking about online connectivity, as long as two PCs can communicate directly with each other then yes. That's all it really takes for that to work. That's in basics also what online subsystems do.

[twilit radish]

From what I remember being mentioned here is that it had issues because it was still rather new. That was in 5.0.3 or 5.1 though. Not sure how good it works in for example 5.2, but I would highly recommend you just try to give it a go in a test project first before integrating it into a real project only to then find out it doesn't meet your expectations.

[gloomy zealot]

I'm going to try that thanks !

[fervent hazel]

Hello, can someone help me implement something in UE5.1? i Would pay for that! I need a basic system where 2 players local can play. 1 is controlled by the keyboard and mouse and 1 by controller. Someone maybe here to help me with that?

[twilit radish]

@fervent hazel If you have any specific questions you can ask them in here. If you're looking for someone to do it for you there's a job posts section. See #instructions

[fervent hazel]

I asked a specific question, and im looking for someone to do it with me, not for me.

[quartz iris]

Would anyone be able to help as i'm still stuck on this. I can't figure out how to make the gamemode play widgets on the respective winner/loser playerstate variables

[pallid mesa]

take a look at #volunteer-projects for that.

[rose turret]

if I fire an RPC, does UE wait until the world is ticked before it actually sends it?