multiplayer

[quartz iris]

I'm still trying to get a flashbang to effect both players but right now it only effects server and the clients don't even see the flashbang let alone the effect of the flash

[uncut schooner]

Multicast

[uncut schooner]

Replicate the flashbang BP

[quartz iris]

How?

[uncut schooner]

Open BP

Go do defaults

Click Replicates

[quartz iris]

Oh for fuck sake was that really the issue

lmao

Thanks

[uncut schooner]

Most likely yes

Np

[quartz iris]

I was so confused to why it was only working on the server lol

[uncut schooner]

Lol, been there a long time ago

[raw thunder]

Your custom event is put on "Execute on Server"

[quartz iris]

Is that not right?

[raw thunder]

It is, if you want to replicate the object like this

[uncut schooner]

That is right, if your gonna replicate

[quartz iris]

oh kk

[raw thunder]

I was answering why it was only on the server 🙂

[quartz iris]

Yeah

And if the whole bp doesnt replicate im assuming it does nothing

[raw thunder]

If it's just a 1time event you could also have a "Execute On Server" -> "Multicast" it will spawn it on all clients

[quartz iris]

Do I need to do that if there's going to be a host?

[raw thunder]

(Your first solution works, there is just multiple ways to do it)

[uncut schooner]

And if you go that way, spawn one locally

Then on the server in the server rpc

then on the multicast, ignore the server and locally controlled character

And then you have it spawning on everyone

[raw thunder]

Yes 🙂

[uncut schooner]

Locally, including yourself

[quartz iris]

oh I see what you mean so if i only need to replicate once in the entire bp I can just call server and clients rather than just server with replication enabled on the bp

[uncut schooner]

So if there is ping/net latency, your character won't notice it

[raw thunder]

Exactly

[quartz iris]

Got it

Im assuming that when replication is enabled whatever the server event is doing it does it on every other client

[uncut schooner]

Yes but it takes time to send the req to the server and then time to send it back to you (And to others)

Doing from you to the server and then to others is right

But you should spawn one locally so it seems like there is no lag, then remove the one the server spawns on your machine

[sinful tree]

Bad assumption. Some nodes do replicate their effects, others don't. Eg. A "spawn actor" node doesn't itself replicate. If the actor that is spawning on the server is marked to replicate, then that actor would replicate after it was spawned on the server.

[quartz iris]

Got it

But ideally to stop hackers you'd want the server to know about it

[uncut schooner]

Its a long road

Wishing you luck

[quartz iris]

Haha

[uncut schooner]

Yes

[quartz iris]

Does replicate movement need to be enabled for the flashbang?

[uncut schooner]

Depends

Its got a bit of network overhead

I sometimes leave it off, if your proxy projectiles are going to be for show, and they follow one arc, Then if there is a flashbang explosion, you could just let that happen on the flashbang bp, if your on the server (Has Authority node)

And multicast after that node

[quartz iris]

Huh so the actual flash effect doesnt work on the client everything else works

[twilit radish]

If this is referring to a flashbang effect like CS:GO has, there's not anything stopping you from as a client just ignoring that effect 🙂

[uncut schooner]

Lets see your BP

[quartz iris]

The flashbang effect is an interface

[uncut schooner]

OnFlashbangApplied, Remove all updates from the server, OnFlashBang Complete start updating client again

Lmao

[twilit radish]

Yes, but no 😂

[quartz iris]

This was to start the flash

[uncut schooner]

Hmm, I think do a multicast on the server flash bang bp

Then call that

[quartz iris]

Should I remove the interface?

[uncut schooner]

Whats it for

[quartz iris]

Applying the flash to the player

[uncut schooner]

I don't see the need for it, do it in the flash bang

Unless you have a specific workflow

[quartz iris]

Interfaces aren't on the server are they?

I guess thats the problem

[uncut schooner]

Yeah probs

[quartz iris]

This alright?

[uncut schooner]

You should apply the flashbang effect in the Flashbang BP (Or call it from there) using a multicast, If your the server

[quartz iris]

Can the server not apply widgets from a actor?

[uncut schooner]

Only on a multicast

[quartz iris]

Oh

[uncut schooner]

Or a client rpc

[twilit radish]

Widgets/UI are client side, they don't exist on the server.

Or well rather, they aren't networked.

[uncut schooner]

Sending data through a "Instance editable" and "Show on spawn" doesn't replicate to clients?

[quartz iris]

Oh right I see because if it's a custom server event and you're creating a widget you're creating the widget on the servers view

So I just flashbanged a client player and the effect hit the server lmao

[uncut schooner]

The var was not set to replicate, Trying that now

[quartz iris]

Does multicast effect the server player too in the same way?

[twilit radish]

Well assuming you use a Listen Server, I guess. But you can't call RPCs etc. from a widget. They don't have any netcode. So you need to call something else that is replicated and call for example a RPC on that to then create a new widget or whatever you want.

[uncut schooner]

Yes

[quartz iris]

Got it

[uncut schooner]

But remember time to send data to server then to send back to everyone

[twilit radish]

With some exceptions though, but generally yes.

[quartz iris]

would it be better then to create a custom event multicast with the create widget on the player and call that from the flashbang bp?

[magic yoke]

I've triple checked

[twilit radish]

I'm not an expert, but considering this isn't a 'state' issue because it only is relevant at the moment it happens I would just call an RPC on all player controllers and have that activate the flashbang effect.

[magic yoke]

everything is default, but I'm 100% certain "play as client" launches a listen server, even though my settings claim it's launching as a dedicated server

[uncut schooner]

An easy workaround

Create a function on the character called apply flashbang effect

Then make it a client RPC, reliable

[quartz iris]

I'm learning guys 😄

[twilit radish]

Reliable is not needed IMO, for the reason that it should be at that moment in time.

[uncut schooner]

Then on the flashbang explosion, make sure you use an "Switch has authority)

[uncut schooner]

(It is in this case)

[quartz iris]

This is needed?

[uncut schooner]

Then do the lintrace if you have authority

Cast the hit actor to your character

And call that function

You'd want the flash to definitely get applied so reliable is necessary

[uncut schooner]

Hmm

[twilit radish]

It's not essential to the state of your game though. It doesn't matter too much if a laggy client will get it or not because at that point they will likely experience way more issues already. But I guess it's a difference in opinions. Feel free to choose whatever you think fits for the game 🙂

[uncut schooner]

That won't work

[uncut schooner]

^^

You gotta break the hit result

Then cast the actor to the character

[quartz iris]

oh wait yea

[uncut schooner]

Then have the function in the character using a client rpc

[magic yoke]

ysura, y'aint gonna believe what I found

[uncut schooner]

Ye but in AAA games they use prediciton to avoid that stuf

so you'd generally use Reliable

[magic yoke]

the game is launching a dedicated server, but the client is launching as a listening server

[uncut schooner]

If your going that route

[twilit radish]

Prediction does not magically make packets arrive and tell me I should apply a flashbang or even tell me that flashbang existed in the first place. If I lag in an AAA game they have the exact same issues.

[uncut schooner]

For things like FX

You wouldn't use reliable

And in this case the FX is for doing something important like blocking view, so its reliable

Well think of it in the case of, Is this an FX or is it a Gameplay important function,
Is it weapon tracer FX, or is it Weapon damage>

[twilit radish]

It's not essential to your game state though, the game can run completely fine without that RPC ever arriving. So that makes it a choice to whoever designs the system if they want it reliable or unreliable 😛

[uncut schooner]

You definitely wouldn't make your damage RPC not reliable?

[quartz iris]

I can't understand why doing it this way wouldn't work

[raw thunder]

Maybe there is a bug in UE5.0.2

[uncut schooner]

But you its up to you

[twilit radish]

I'm talking about the flashbang effect.

[magic yoke]

wouldn't shock me. Also running "listen client" mode does the same thing. Launches both listen and dedicated servers

[uncut schooner]

The function

Is it a client RPC?

[quartz iris]

Erm

[uncut schooner]

Get Flashed

[raw thunder]

This is not the case for me, I have a dedicated server and a client when I launch in client mode

[quartz iris]

Not totally sure

[uncut schooner]

Double click it

And click on the function

[magic yoke]

I'll verify my instal

[uncut schooner]

Make it an event

Then Mark it as

[raw thunder]

I just run this

[uncut schooner]

And imo, mark it as reliable

[quartz iris]

Just wondering would multicast work for this?

[raw thunder]

@magic yoke The server is dedicated and the client is client

[uncut schooner]

No need for a multicast

[magic yoke]

I was running it in game mode: "print is server, print is dedicated server"

I'd see 2 sets of print. Truetrue, and truefalse

[uncut schooner]

Would be a waste

[magic yoke]

so something's wrong with my install I guess?

[raw thunder]

Like this§

[magic yoke]

exactly like that yeah

in game mode

lemme triple check

[raw thunder]

I have True True for the server and False False for the client

[uncut schooner]

Can a local player destroy a local version of a replicated actor>

[quartz iris]

Alright finally it works

lol

[uncut schooner]

Without going through the server?

[quartz iris]

Yeah

[raw thunder]

I don't think so

[quartz iris]

Well I made the flash server sided

[raw thunder]

the server will just respawn it no?

[quartz iris]

But the effects client

[uncut schooner]

Idk

[magic yoke]

you can, but it'll be respawned I believe

[uncut schooner]

Ok

[magic yoke]

@raw thunder

[raw thunder]

wtf

[magic yoke]

you're telling me lol

no wonder I'm having weird ass bugs

[raw thunder]

Oh GameMode

Hum

[magic yoke]

game mode only runs once, server side

[raw thunder]

Let me try on gamemode

[uncut schooner]

?

[quartz iris]

Server to client

[magic yoke]

listen server gives me the same results

[uncut schooner]

Yup

Thats the best way in this case

[quartz iris]

Saves on bandwidth im guessing?

[raw thunder]

no but why is it firing two times? Mine only once

[uncut schooner]

Kinda

Also is less complicated lol

[magic yoke]

like I said

the client it's launching is acting as a listen server

at least, that's the only explanation I can think of

it also explains why a lot of my text stops having "client" vs "server"

my friend noticed that a couple days ago

[dark edge]

Test with launching with batch files, sec, i'll send them

Or rather, just launch, not PIE. See if it's different there.

[magic yoke]

err

pie?

oh

play in editor

this is pretty early on

I don't have the ability to specifically connect to a serve ryet

[dark edge]

@magic yoke

[magic yoke]

launch looks like you need to launch dedicated server separately and then connect>?

[dark edge]

Sure you do, hit tilde to get to console, and type "open IPADDRESS"

[magic yoke]

@dark edge attemption to launch the server gave a cook failed

choosing the variant "windowsserver"

launching it normally gave me a listen server

[dark edge]

You got a bunch of unknown structures so I'd settle taht problem before moving on lol

LogInit: Display: LogProperty: Error: FStructProperty::Serialize Loading: Property 'StructProperty /Game/CartController.CartController_C:Refactor Display Chunks to New Center:CallFunc_Get_Chunk_Chunk_Structs.CallFunc_Get_Chunk_Chunk_Structs'. Unknown structure.
LogInit: Display: LogProperty: Error: FStructProperty::Serialize Loading: Property 'StructProperty /Game/CartGameState.CartGameState_C:World Array.World Array'. Unknown structure.
LogInit: Display: LogProperty: Error: FStructProperty::Serialize Loading: Property 'StructProperty /Game/CartGameState.CartGameState_C:Get Chunk:Chunk Structs.Chunk Structs'. Unknown structure.
LogInit: Display: LogProperty: Error: FStructProperty::Serialize Loading: Property 'StructProperty /Game/CartGameState.CartGameState_C:Get Chunk:Tile Struct Array.Tile Struct Array'. Unknown structure.
LogInit: Display: LogProperty: Error: FStructProperty::Serialize Loading: Property 'StructProperty /Game/CartGameState.CartGameState_C:Get Chunk:K2Node_MakeStruct_CartTileStruct'. Unknown structure.
LogInit: Display: LogProperty: Error: FStructProperty::Serialize Loading: Property 'StructProperty /Game/CartGameState.CartGameState_C:Load World:Loaded World Array.Loaded World Array'. Unknown structure.
LogInit: Display: LogProperty: Error: FStructProperty::Serialize Loading: Property 'StructProperty /Game/CartGameState.CartGameState_C:ExecuteUbergraph_CartGameState:K2Node_CustomEvent_Loaded_World_Array.K2Node_CustomEvent_Loaded_World_Array'. Unknown structure.
LogInit: Display: LogProperty: Error: FStructProperty::Serialize Loading: Property 'StructProperty /Game/World/CartTile.CartTile_C:Tile Struct'. Unknown structure.
LogInit: Display: LogProperty: Error: FStructProperty::Serialize Loading: Property 'StructProperty /Game/World/CartTile.CartTile_C:Change Representing Tile:New Tile Struct'. Unknown structure.
LogInit: Display: LogProperty: Error: FStructProperty::Serialize Loading: Property 'StructProperty /Game/World/CartTile.CartTile_C:ExecuteUbergraph_CartTile:K2Node_CustomEvent_New_Tile_Struct'. Unknown structure.
LogInit: Display: LogClass: Warning: Property Tile Struct of Tile Struct has a struct type mismatch (tag STRUCT_REINST_CartTileStruct_29 != prop FallbackStruct) in package:  /Game/World/CartTile. If that struct got renamed, add an entry to ActiveStructRedirects.
LogInit: Display: LogClass: Warning: Property Tile Struct of Tile Struct has a struct type mismatch (tag FallbackStruct != prop CartTileStruct) in package:  FObjectReader. If that struct got renamed, add an entry to ActiveStructRedirects.
LogInit: Display: LogClass: Warning: Array Property World Array of World Array contains a struct type mismatch (tag FallbackStruct != prop CartTileStruct) in package:  FObjectReader. If that struct got renamed, add an entry to ActiveStructRedirects.
LogInit: Display: 
LogInit: Display: Failure - 10 error(s), 3 warning(s)

[magic yoke]

they're all my custom fiels

files*

but the weird thing is that only happens if I run "by the book" mode

"cook on the fly" doesn't seem to care?

[dark edge]

Yeah idk, I don't even cook for quick testing. Just fire up through those batch files and get on with it.

[magic yoke]

well I can try the batch files

that's being run through the project launcher

[magic yoke]

copied your .bat files, reworked them to be for my stuff instead

client launched in listen server again

the mismatches are apparently because it's angry I renamed structs

which I'm assuming is a bug, since the editor claims it'll handle that

but there's some C++ redirect code it wants that the editor didn't properly handle?

[thin stratus]

If you are printing "IsServer"

And that returns true

Then that doesn't mean you are a ListenServer

[dark edge]

Have you fixed up redirectors?

[magic yoke]

I don't know how because that's C++ and I'm blueprint only

[magic yoke]

it prints that if you're listen or dedicated server right?

[thin stratus]

Wrong

It prints if you are not a client

And a freshly started game is Standalone

Which is not Client

[dark edge]

Right click content folder, hit Clean Up Redirectors In Folder

[uncut schooner]

Hmm something weird is happening

[magic yoke]

ok will do when I'm done verifying

[uncut schooner]

I am passing in a vector, on a instance editable, show on spawn

But in the construction script of the BP it reads 0,0,0\

[magic yoke]

I'm certain my client is printing "is Server" though, game mode is also being run x2

[thin stratus]

Are you actually starting a Client that is connected to the Server?

Because if not, then IsServer returns true cause you are standalone

[magic yoke]

I was using PIE

[thin stratus]

And Standalone also has a GameMode

[magic yoke]

set to Client Mode

where this first showed up

[uncut schooner]

Now its working after a restart...

Weird

[dark edge]

Show your PIE settings

[thin stratus]

This should print only once

[magic yoke]

yup, it prints twice

[thin stratus]

What Mode do you start in?

[magic yoke]

server:true dedicated:true
server:true dedicated:false

in client mode

[uncut schooner]

Doesn't it print twice because you start as a local player

[thin stratus]

No, what like PIE mode

[magic yoke]

I see those two prints lol

[uncut schooner]

So server

Then you connect to the dedicated

[magic yoke]

play as client?

that's what you mean?

[thin stratus]

Selected Viewport, New editor Window, Standalone Game

That stuff

[dark edge]

@magic yokeYou sure you don't have auto-connect to server turned off? Show your advanced PIE settings

[magic yoke]

gotta finish the instal verify

then will do

[thin stratus]

I'm not sure UE5 still has teh Auto Connect to Server thing or?

[magic yoke]

that's what I remember it being

no it doesn't have a checkbox for it

not that I could find

since someone suggested

ok I gotta do something and this verify is gonna take 15 more minutes

will be back to bug once it's done, thanks for all the help <3

[quartz iris]

So im trying to make a thrown c4 land correctly upwards when it hits a surface

How can I do this?

I need it so it lands correctly on walls too

[thin stratus]

Is the C4 correctly rotated upwards in its BP?

[quartz iris]

Yes

[dark edge]

Event Hit gives you the normal

[thin stratus]

Then you need the Surface Normal

[uncut schooner]

If I get 2 output pins from a single node

[thin stratus]

The Hit usually give you that

[uncut schooner]

Does it fire 2 times?

[thin stratus]

You can make a Rotation from that

[thin stratus]

Depends on what node we are talking about

[quartz iris]

Is it look rotation?

[uncut schooner]

As an example

[dark edge]

@quartz iris

Event Hit -> Self.rotation = MakeRotationFromUpVector(Hit.normal)

assuming the c4 is oriented such that up is away from the surface

[thin stratus]

Pure nodes can be a pitfall, yes

https://celdevs.com/2021/09/14/unreal-engine-and-the-hidden-pitfalls-of-blueprints/

[dark edge]

That should not be a pure node

[uncut schooner]

Damn, I've been using pure everywhere because it feels convienent

Thanks

[dark edge]

Pure functions ONLY depend on their inputs

I mean, idk if it'll error out or not if you push the pureness of a BP pure function to its limits, but in C++ that wouldn't be a pure function.

[quartz iris]

I cant get it from event hit

[dark edge]

I'm assuming BP makes the Camera an implicit parameter.

[dark edge]

Break hit result

[quartz iris]

From normal?

[dark edge]

Break the hit result struct, it gives you a ton of information. One of the fields is the hit normal

[thin stratus]

Also this isn't reeeeeaally multiplayer related :D

[dark edge]

Z but move it to #blueprint

[quartz iris]

Would this work for all players?

[quasi tide]

Thanks for this link. I've heard the pure in BP can be problematic, but never dug into it 👍

[dark edge]

Why does your c4 have a capsule collider?

[quartz iris]

The mesh collision is unreliiable

[dark edge]

Why a capsule and not a sphere?

Anyway

Assuming the rest of your setup works, that should take care of orientation.

[quartz iris]

It feels to satisfying lol

To detonate a c4

[quartz iris]

Would this work though for multiplayer?

[dark edge]

How tf would we know, we don't know anything about the rest of your setup. We don't know if you're processing hits everywhere or only on server, if you're replicating movement or handling it some other way, none of that. I don't see anything that'd obviously make it NOT work.

[magic yoke]

@dark edge fix up redirectors did nothing to solve those red/yellow errors asking for redirects

@thin stratus

"C:\Program Files\Epic Games\UE_5.0\Engine\Binaries\Win64\UnrealEditor.exe" "%CD%\Cart_and_Coin_Deluxe.uproject" Cart_and_Coin -game -log -nosteam

running this still causes me to run a GameMode

launching multiple clients causes multiple "listen server" clients to appear

I swear I was told that GameMode only runs server side

which explains some other bugs I've been having

[thin stratus]

GameMode runs Server and Standalone

Not client

[glossy plover]

Is it possible to have both local and online multiplayer together? So for example 2 PCs connected, but 2 controllers on each PC?

(so 4 total players in that example)

[chrome bay]

Yes, quite difficult to support though

Split-Screen multiplayer works in ShooterGame AFAIK

[magic yoke]

right, well my issue is I'm either launching multiple standalones or multiple listen clients

but either way, I'm not launching dedicated+client

or listen+clients

because launching listen mode puts up a bunch of standalones or something

[chrome bay]

Or they're being instantly kicked from the server

[magic yoke]

if they're insta kicked

would they run game mode at that point?

[chrome bay]

they would travel to the "default" map for your project, and run that world as if it was standalone

[magic yoke]

ok

so that's most likely what's happening

[chrome bay]

Should see the kick messages in logs

[magic yoke]

message longs?

logs*

I'm not seeing any errors along those lines

mind, when trying to launch a standalone server I'm getting bizarre errors

maybe the server's crashing due to this and the clients are left hanging?

[chrome bay]

Fixing errors should indeed be the first prio

[magic yoke]

no idea where to start with these

[chrome bay]

Realistically I don't think those Blueprints should even compile

[magic yoke]

they don't if you "compile by the book"

but if you "compile on the fly" they do

[chrome bay]

Not sure what you mean

If the BP's don't compile properly, it stands to reason you'll get errors at game time

[magic yoke]

in the project launcher

by the book errors

on the fly doesn't

[chrome bay]

Oh ignore that, I'm just talking about in-editor

[magic yoke]

in editor I see zero erros

errors anywhere

[chrome bay]

That's the cooker params, so irrelevant to in-editor testing

[magic yoke]

only place I find that is buried deep in cook logs

there aren't any errors in the blueprints named

[chrome bay]

Try resaving those BP's also to see if it goes away

[magic yoke]

that I can see

they're fine though?

Property 'StructProperty /Game/CartGameState.CartGameState_C:World Array.World Array'. Unknown structure.

LogInit: Display: LogClass: Warning: Property Tile Struct of Tile Struct has a struct type mismatch (tag STRUCT_REINST_CartTileStruct_29 != prop FallbackStruct) in package: /Game/World/CartTile. If that struct got renamed, add an entry to ActiveStructRedirects.
LogInit: Display: LogClass: Warning: Property Tile Struct of Tile Struct has a struct type mismatch (tag FallbackStruct != prop CartTileStruct) in package: FObjectReader. If that struct got renamed, add an entry to ActiveStructRedirects.
LogInit: Display: LogClass: Warning: Array Property World Array of World Array contains a struct type mismatch (tag FallbackStruct != prop CartTileStruct) in package: FObjectReader. If that struct got renamed, add an entry to ActiveStructRedirects.
LogInit: Display:

I think this is the issue

but I don't do any C++ coding

and if I did rename it's only through the editor

I guess maybe bug in renaming for the editor?

[chrome bay]

Hard to know exactly what's happened, but my guess is something was renamed and left a redirector behind, and now that redirector is gone and past refs to it are broken

[magic yoke]

clean up redirects does nothing

sadly

[chrome bay]

Did you delete them in explorer or anything?

[magic yoke]

no, I've not done anything outside the editor since starting this project

my last project corrupted probably because I did something like that

so I've been strict about it

[chrome bay]

Accidental hot-reload or something?

[proud galleon]

Do you think it makes sense to use sql for inventory? Because I need to separate all the rows one by one and check if they are full or empty and add them to the inventory. I personally think that these processes will tire the computer and it will be very tiring in the blueprint. What should I use?

[magic yoke]

only work in blueprints? I did do a reversion via SVN

could that cause it?

[chrome bay]

Ah yeah, probably then

[kindred widget]

What are the required modules/includes for creating a FastArraySerializer?

[chrome bay]

NetCore module I think

[magic yoke]

:| how do you avoid breaking things with reversions then lol

[chrome bay]

Well ideally, all the files affected by changes in a given revision are part of that changelist

[magic yoke]

SVN was supposed to save me, not hurt me T-T

[chrome bay]

But I expect some files that were dependant on changes to others did not get reverted in that process, or something.

[magic yoke]

ok

well whatever happened

do you know how to fix this?

would the best idea be to make new structs and replace references?

[chrome bay]

Probably re-create those properties that are causing the issues

[magic yoke]

is replace references safe?

[chrome bay]

Theoretically yeah

But probably not for Structs

[magic yoke]

well I can revert

but reversions don't seem to WORK for everything

[chrome bay]

You just need to make sure all files affected by changes are submitted in the same changelist, and the same when reverting

[kindred widget]

Hmm.. NetCore didn't work. :/ I have the following two includes already. And zero error highlights. Just a ton of unresolved external stuff.

#include "Net/UnrealNetwork.h"
#include "Net/Serialization/FastArraySerializer.h"

[magic yoke]

as far as I'm aware, I submit everything all at once

[chrome bay]

BP does tend to crap itself if you rename BP structs anyway, definitely seen that before but don't really know all the causes

[magic yoke]

sighs

shame, don't like working with "dangerous" things

but I need structs lol

well I did learn a lot here

I'll try to refactor away from the broken BPs

[pearl fog]

Hello, we have a big problem with our multiplayer, players host theirs own listen servers and for some reasons some servers have big replication issues (like things get very long to replicate, UI don't show up etc), we've tried everything we could, we've done profiling but we just don't understand what's going on..
(we use steam sockets for our netdriver)
oh and all players that report the issue have a low ping

[quasi tide]

DataTable if you want an in-engine solution.

Oh - you're asking about an inventory itself and not a database.

Uhh - I'd find it to be weird to have your inventory as sql personally. Can just be an array of structs.

[dark edge]

Not unless you're making EVE Online

If you were making an EVE or a WoW? Sure you need a DB. If it's a basic game without millions of items, nah.

[wide sable]

I started off by making my game singleplayer and now im going through the trouble of going through and changing it to multiplayer. I made a GameInstance class and I am trying to setup the widget system that has countdowns and displays. GameWidgets is a TMAP that contains the PC and a pointer to a the widget class.

Apart from that, my main guess is that for DisplayCountdown() I should keep the iterating through PCs in the GameModeBase and then to use the GameInstance to send a signal to the GameModeBase whenever necessary.

This is my first time trying to understand GameInstances and it's a little confusing for me currently so sorry in advance if everything is sloppy

[fluid summit]

Hi everybody!
I'm trying to make a healthbar for each party members (every player state on the game, it doesn't need to differentiate for anything else)
I want something like this

i'm thinking on add a new widget to every player locally when a new controller gets in and for each player state add a widget.
My problem is that i'm not sure on how to update the specific widget on each remote whenever some player state changes (let's say hp)

Do i make an array of Widgets on each PlayerState and when variable changes OnRep, i change the value of the widget?

how would you go about doing something like this?

[graceful flame]

Should a retriggerable delay's length be a replicated variable? I'm thinking it needs to be replicated for anti-cheat because its used to control fire rate of a weapon even though it never changes. Is that correct?

[nova wasp]

Least insane event/function that fires once on each actor on the server?

Beginplay is not it

[fluid summit]

Beginplay -> has authority (yes)

that will only fire once per actor spawn on the server

if you go the "No" route, you get the remote version

[dark edge]

Why not?

[nova wasp]

Just seems like it will get triggered multiple times

[dark edge]

Why would it? How many times does an actor begin play on the server?

[nova wasp]

Fuck it, yolo

I'm gonna reread the compendium

You are probably right

[dark edge]

I mean you could hook into event on destroyed if that's more your style

[kindred widget]

You would need that event yourself whenever health is changed. Until you have framework in, just tick it from the widget's playerstate pointer. Can always be made event driven later. Make it work first.

[fluid summit]

So the idea would be to subscribe the widget to a event dispatch? that was my first tought but i'm not sure how efficient that is.

I'm trying to create the widget OnBeginPlay of the playerstate, and add it to the HUD of all the players, then try to update that widget OnRep of player state desired variable. Having some troubles at the moment, not sure if this works : P

[fluid summit]

You are getting multipler triggers because you get one Actor on Server and one OnClient.
So if you put a "print" OnBeginPlay, you will get 2 prints. One for the client version and one for the server version.

You can filter by checking "Has Authority" and deciding where specifically you want to let that flow go

[nova wasp]

I know, it's just the preexisting code here sets a bool to ensure it only does this once

Hence my suspicion

[kindred widget]

I strongly recommend learning to separate UI from gameplay in a way that Gameplay doesn't enforce UI. The UI should be able to be be created at any time independent of whether the playerstate exists. The playerstate shouldn't do anything but exist in this context. GameState should have delegates that get called when a playerstate arrives and is removed from a client. The container holding your widgets can update and add or remove a widget from the list at that time. But the container should also have the ability to fully update itself for all current playerstates, etc. All the container should need to do is pass the playerstate associated with the newly created widget in it's CreateWidget call. The widget can then either tick to poll and update UI, or bind to whatever runs the health. If the Health is in a component in the pawn for example. The widget needs to be able to GetPawnPrivate->GetComponent->Bind. And that's assuming it's valid. If the pawn isn't valid yet, you also need the ability to wait until that Playerstate's pawn is valid, etc. It's a complex setup that can quickly get annoying with engineering changes to the project. Which is why I strongly recommend just ticking it in the widget that gets the playerstate passed to it. Eight widgets ticking a few checks isn't going to really be noticed in a profile since you're not invalidating very often, it'll work well and you can move on to other things. If the time comes to make it event driven, go for it. But in my personal opinion it's a waste of time to bother.

[fluid summit]

This makes more sense, UI doesn't have anything to do with the player state.

This setup works ->
PlayerState -(BeginPlay)-> Create Widget variable -> Tell Pc to update UI
PC -(update UI)-> Get all player states, fill wrap box with variable "UI" from the player states.

And on playerState health change (OnRep) just update the variable UI.

It's a mess already and it's only one widget.

I'm gonna go with something similar to your suggestion and let the PlayerState tell the PC to update the ui and there generate one widget for each playerstate and bind them to the PlayerStateEvent.

[fluid summit]

"Or Bind to whatever runs health" Is it posible to make a bind to a specific variable state? Like a RepNotify with a event dispatcher.
Maybe there's something like that by default already and i don't know.

[kindred widget]

There isn't anything like that by default. Anything like that would need to be your own implementation.

[fluid summit]

The event dispatcher is working fine on the server but not on the client, oh god don't tell me that you can't replicate Event Calls to clients

[spark stag]

i'm trying to talk about some data assets over the network with server RPCs. data assets that derive directly from a C++ class work, but i have some that derive from a blueprint class that is derived from the C++ base class. those ones don't have RF_Loaded, so unreal doesn't think they have a stable name

any idea why that is?

[fluid summit]

Got it working and i can easily wrap my head around this setup in case i get some troubles later. This one is better than the one i was thinking before, thanks

[spark stag]

i am professional game devloper

[fluid summit]

Does it make any sense that i'm geetting a delay of about 1 sec on the event dispatch call? the UI on the clients takes 1 sec to update. I don't have a delay node anywhere and the ping should be 0 since it's local

(I'm using steam session for matching the session)

[dark edge]

Print strings to find out where the delay is.

[kindred widget]

My initial assumption with that would be that the first call didn't do anything. Called too early maybe. Maybe something else calls it after 1 second and runs it again?

[lime iris]

I need help!

All of my gameplay logic is inside a widget, and everything needs to be “reliable” (execution order is important) or else it will break the game.

Here’s my setup:

Whenever a player executes [Mouse Button Double Click] (as one of many example) from a widget, I do Widget (perception only) > PlayerController (run on server, reliable #1) > GameState (multicast, reliable #2) > Widget (for the widget to execute the rest of the logic, all clients).

(Btw, do I need to check reliable 2 times up there?)

The problem is, when there’s a latency (randomly simulated) on the network, it’s slow/lagging too much (other players need to wait for the commands to execute in order). Probably because of over-using “reliable”.

is’t better to use variable repliction (not sure, but I think some people call this property replication)? Are they “reliable” (and do they also execute in order, same as RPCs)? Should I pull all my blueprints & variables outside of the widget, and somehow put it on GameState or perhaps PlayerController?

[kindred widget]

This likely doesn't have anything to do with being Reliable. That won't really slow anything down unless you're spamming it thousands of times on tick. The issue is simple lag.

Not going to go into depth on reasoning unless you ask, but generally speaking I would strongly advise using other class types for gameplay logic. Widgets should do nothing but display the game class's state and allow input to them. The only complex logic in widgets should be their own functionality for layouts, visuals and such.

Replication is not promised in order. If you require perfect order, you have no choice but to wait for client to sent to server, and server to send back though RPCs. Replication is usually reliable in a sense that it will definitely arrive on client, but there are a lot of considerations for timing. Having said that, your logic does seem like a typical use case for property replication with an OnRep that runs a delegate. Widget click RPCs through controller. GameState does whatever, sets new state and the new state replicates to all clients. All clients run their delegate in their OnRep function. Widget has that delegate bound and does whatever you were doing in the multicast maybe. Though this shouldn't change anything with the latency. It still has to travel to server, and be sent to each client.

[fluid summit]

So, this.
I'm finding a few other problems with the event solution, so i'm just gonna tick.

[kindred widget]

Heh. I love event driven solutions. But sometimes, they're just not worth it. Those checks are insanely cheap anyhow. You would probably need a thousand widgets doing that check to notice anything.

[fluid summit]

You mentioned this "Eight widgets ticking a few checks isn't going to really be noticed in a profile since you're not invalidating very often"
does that mean that there's some sort of resource saver once the pointer to the object is set and the validation does not run anymore?

[kindred widget]

Mostly in UI, you just want to avoid constantly invalidating large sets of widgets all the time. Setting widgets attributes to the same value they're already at fails in their SetAttribute code. It won't invalidate if it's nearly equal the already set attribute.

If you set a ProgressBar's Percent to 0.5 percent in tick. It invalidates once. It won't invalidate again until you set it to something other than 0.5. Even 0.5001 would invalidate it, but feeding it the identical 0.5 will not. So the tick function basically ends at your code trying to set the 0.5 value over and over until health changes. No extra visual update code runs at all beyond that until the health changes.

[fluid summit]

oh that's nice

[lime iris]

Quick question, does OnRep reliable (executes in perfect order) or only RPCs?

[kindred widget]

There is no reliable order for OnReps. They just run when the value arrives on client, and you can't really always promise whether that value will arrive before or after another one.

[mint nymph]

hi i am having desyncing issues, with multiplayer when players are sprinting. When I press space and jumps player jumps back into sync any fixes that people can suggest

[fathom aspen]

I think the order is reliable under a single translation unit, i.e same class. Though as you said, one must not take that assumption

[fluid summit]

Okey so the 1 seg delay with the UI updated with the event dispatcher had nothing to do with the Event Setup.
I'm getting the same 1 seg delay when updating on "Tick" from UI.

It seems i'm having 1 seg lag on the variable replication even when running on the same pc, weird.

[chrome bay]

What's the update frequency of the actor performing replication?

[weak aurora]

Hi, anyone know why my code fires twice on the server in the first case but not the second?

Case 1: Character inputs key F to spawn an actor with "Run On Server". This spawned actor then takes the instigators' character movement component and with a custom event with "Run On Server" increases the Max Walk Speed by 2x, runs a delay for 3s and then halves it. This fires twice On the increase movspeed, but only fires once on the halven-movspeed.

Case 2: Character inputs key F to "Run On Server" set Max Walk Speed by 2x, runs a delay for 3s, and then halves it, in the character blueprint itself. This works as intended.

EDIT:
Solved it by Running Switch Has Authority on the first Case before Run On Server set Max Walk Speed

[forest flint]

hello. I am making 4 coop game with listen server on Steam. I started to thinking about dedicated server on one of player's pc for better performance. one map will be open world 3x3 km and second map will be inside bigger building with many floors inside. it will contain level streaming somehow. is it worth to move to dedicated server or it will be no much gain from moving from listen server to dedicated server on player's pc

[shell haven]

Hey so I am having an issue where my client players are becoming gradually desynced over time from the server and other players. This effect is quickened when running into a wall. The players report seeing that person in a different location than the actual player is. I assume there is some predictive thing going on that is moving the players on the server incorrectly, but the actual player position/state isnt being updated fully

Strangely, jumping will cause this desynced player to automatically teleport and resynchronize with their location according to the server

Any ideas? This is very frustrating

[bitter oriole]

There's zero gain in using a dedicated server on one player's machine

[forest flint]

ok, thank you. I thought so, but I heard from more experienced developer that this approach is better

[bitter oriole]

Dedicated server is indeed a higher quality approach for competitive games that have anti-cheating facilities and a large player count

But it only makes sense if that server is hosted in a datacenter

[chrome bay]

It could also be useful if you want the network stuff to tick at a fixed rate though, or be totally independent from the hosting players' local game

e.g. remote players can sometimes look pretty weird on listen servers

[sick escarp]

someone help me fix this pls

my player 2 cant shoot

[real ridge]

guys can I ask is any way to store player state after quit game ? even I will run 5 clients of games on pc can I save after quiting it for all 5 ?

somehow ?

😄

I am not sure if it will working

I generated some sort of unique player id and I want it save so after running game i will see that he already has his unique id generated

[upbeat basin]

I didn't quite understand what you're trying to achieve but did you check APlayerState::OverrideWith and APlayerState::CopyProperties? You should be able to get a reconnecting player's PlayerState from previous connection, where you can get data and set on the new PlayerState to make it look continuing from where it left. Would this help?

[real ridge]

I want generate own unique id for player (this is done) and then save that unique id in string in player state 😄 and then if I close game and run it again i want have that saved id there

(but before connecting to server )

talking about in game menu or lobby or i dont know how to call it

just after running game

[upbeat basin]

Where do you want to save this unique id, on client or on server? If you're going to save it on server you shouldn't be able to get it without connecting to server again or without having your own backend kind of a service. If you want to save it on client, you can, but it wouldn't be safe if you want to prevent cheating

[real ridge]

just for now for testing I want save it for client before connecting to server and then via varest I will send it to my database where I can start matchmaking

with these ids

and then I will execute server with map

to start game

[upbeat basin]

If that's the case you can use SaveGame to save your string on the local disk

[real ridge]

okay and i can use this save game only for 1 client per 1 pc ?

or can run 4 clients and all 4 will be saved ?

[upbeat basin]

4 clients in a single PC?

[real ridge]

yes

not possible ?

[upbeat basin]

SaveGame basically creates a file with .sav extension and writes the variables that you have created under it. You can give SlotName parameter any string as you wish to name the file and distinguish for each player, by naming with the playername for example. There is also a UserIndex input that you can give that might work, which I never used before so don't know much about how or what it does

You can check here for more information, it explains for both BP and CPP: https://docs.unrealengine.com/4.27/en-US/InteractiveExperiences/SaveGame/

[real ridge]

why its not safe to have ids saved on clients pcs ?

how can they cheat with that

[upbeat basin]

The string you saved can/might be changed with third party programs, to imitate another player or to break the game

If it's a coop game or running on a listen server, you don't need to care about this, because server itself is already running in the client PC. But if you're working with a dedicated server and it's important to prevent cheats then it's not an ideal case so save something on the client, that is required to match the player with data on the server

[real ridge]

okey thank u

[sick escarp]

help me plssssss

[real ridge]

guys any easy tip how to make something like really eassies matchmaking ? I will hit play and firt 4 players which it will find will join game ?

😄

[marble gazelle]

well you always need some server that does this for you. Multiplayer is never "easy" and it the worst to start with to do games.
I think net subsystems like steam or epic are helpful on this, but I never used them, so dig into these ^^

[harsh lintel]

Is there a way I could debug why my client can't connect to a dedicated server through open 127.0.0.1? The project uses CreateSessionCallbackProxy without issue but I need to be able to connect to the dedicated server

[harsh lintel]

I'm doing this but now I'm getting "incompatible unique net ID"

[pallid mesa]

any of you have tried server streaming with world partition?

[warped berry]

Is there a way to differentiate between steam lobby callbacks for joining/leaving players and lobby data parameters? they both trigger the same callback from steam

[harsh lintel]

how do I turn a FString to a FUniqueNetIdRepl?

[grizzled stirrup]

Should GameSession->HandleMatchHasEnded(); be called before destroying a session?

If you intend on destroying it anyway after is there any reason to call this function?

[winged badger]

It can let you propagate something like "host has left the session" if youre using listen servers

That way players are mad at host instead of your "crappy network code" 😁

[winged badger]

If its steam i think its ConvertFromA

Or something similarly as bad

[winged badger]

I remember some enum in the payload of the callback

@warped berry

[grizzled stirrup]

Ah interesting! Though wouldn't a host disconnect kick the player from the session before firing that or does the session exist on the server and clients separately and they can call it themselves?

Ah it would only be if the host leaves via the menu and doesn't disconnect right? You'd then fire that line on the host and clients can react accordingly?

[winged badger]

It would put clients in main menu, but without a message properly blaming host for the disconnect

[warped berry]

that would be really helpful, I'll check for it

[quasi tide]

And this is the most important piece of the puzzle 😈

[fluid summit]

Hi everybody! i'm trying to set a "SaveGame" variable from the client to the server.

This works right for the server, but for the clients i get this error

LogNetPackageMap: Warning: FNetGUIDCache::SupportsObject: SG_Character_C /Engine/Transient.SG_Character_C_21 NOT Supported.

I found little to none related documentation on how to make this actually be supported.

Does anyone have any idea on how to do it?

[harsh lintel]

I'm adding -nosteam to my server but it seems like it's being ignored

[latent heart]

It's probably because you're sending a local transient actor to the server via rpc - the server doesn't know about your object so it can't be sent.

Solution to that would be to create a struct with your character's properties, save that instead and send that to the server.

The ones you want to save, that is.

Or do some sort of convoluted system where the client asks the server to create a character (via rpc,) the server creates it and sends an rpc back with the new character, and then the client sets all the properties and sends it back to the server Shrug

[fluid summit]

Oh i see the problem now, i think i can work around it. Thanks!

Passing a ST instead of the Object did the work, just need to encapsulate all the variables of the SG into one ST.

[dark edge]

Don't send the object, send the data in the object. What do you mean by ST?

[fluid summit]

St = Structure

Yeah, sending the data was the right way to do it

Hi! it's me again

Maybe i got something wrong about how the PlayerState is on server and on client.

that blueprint is only triggering on the Server

[dark edge]

Is there an Amanda Huginkiss here?

[fluid summit]

But on the server version of the clients, it's not triggering the node "OnBeginPlay"

[fluid summit]

that's way too specific

[dark edge]

What is the server version of the clients?

[latent heart]

Take out your authority check?

[fluid summit]

The PS_BP on the server that replicates to the PS_BP on the client

[latent heart]

And see what happens.

[sinful tree]

This only would trigger on the server as you have the Has Authority branch on there. The trouble being, if the playerstate hasn't replicated to the client yet, then that RPC on the client may be ignored.

[fluid summit]

it works, but i want to understand what am i missing here

Oh i see, that makes sense.
So i guess my logic with how the PS is presented for both client and server is okey, it's just a matter of timing

[dark edge]

Would a reliable RPC eventually happen even if it doesnt exist on client yet?

[sinful tree]

Not even sure about that.

[dark edge]

I really wish we had a couple built in "Everything is ready to go on server and client" events to hook into.

[pallid mesa]

we

do

[dark edge]

?que? What events?

[fluid summit]

I guess we can make a Event that triggers both on client and server and checks if both are ok, only than proceed.

[fluid summit]

hablas español? se te escapo

[dark edge]

nope

Puhun vähän suomea

[latent heart]

Use begin play on both - each begin play runs the smae method and checks if they both exist and if they do, does your thing.

(on the client)

[pallid mesa]

feel free to steal my stuff

but please, try to understand it

• have a good day

[sinful tree]

Playerstate is a bit of weird one. The client will have a "dummy" playerstate before the server replicates its copy. Any events and whatnot running on begin play from the client prior to the server's copy being replicated will not have appropriate values and may or may not run RPCs correctly as they've not established the unique net ID required to facilitate such communications.

[latent heart]

Oh! I see.

[sinful tree]

In Vori's examples, they have the OnRep_playerState which would be the right place to run anything clientside.

[latent heart]

When the PC replicates, it should guarantee that the PS has, though.

..I think?

[sinful tree]

It doesn't

[pallid mesa]

the replicated playerstate

[latent heart]

But yeah, use onrep then!

[fluid summit]

Just in case, i just tested if reliable RPC will handle the client not ready yet and it doesn't.

[pallid mesa]

so onrep in the controller is the safe place to ensure the ps has the right vals

also... feel free to grab the ntp clock that is in there

lmao

it is more accurate that gamestate's one (except for the first 10 seconds)

[fluid summit]

If i'm right, your method is exclusive to C++ and not by BP.
Because you can't override the "OnRep PlayerState" by default unless you create a new variable on the PC for the PS and flag it OnRep.

[pallid mesa]

so TLDR: add this on C++ create some k2s and you can have this exposed in BP's

you can even make the delegate BPable

but I don't recommend it

[fluid summit]

Yeah, i just wanted to confirm if it's possible on BP without exposing functionality with C++.
Thanks for the data, it's actually usefull

[pallid mesa]

in BP's you have to do waiting loops 😬

so if for some reason you want to obtain the same functionality only using BP's

you could create functionality that synchronously waits for values to be valid in the client

[harsh lintel]

    FUniqueNetIdString NetID(SteamId);
    Super::PreLogin(Options, Address, FUniqueNetIdRepl(NetID), ErrorMessage);
``` This is crashing, is it wrong?

it's on PreLogin, I'm also using -nosteam

ah #online-subsystems message

[fluid summit]

I have no idea, but i think may be able to help if you tell me what your desired behavior is

[crystal crag]

Anyone have any idea what would make pending net game never getting cleared in PIE, but it gets cleared just fine when running outside of the editor?

Like even high level general things to check to give me some leads to chase down would be cool. I tried to pull up the references and the engine references it a bunch

[fathom aspen]

Persists means you still have a game mode actor when you seamless travel, not that it's the same game mode. You seamless travel to a new level/map that has a new GameMode configured and hurray

I'm not sure what's the question here

[shell forum]

This means that OnPostLogin will never be called after the connection to the server. If you want a OnPostLogin when a map changes you need to not use seamless travel.```

[fathom aspen]

No. What you want instead is HandleSeamlessTravelPlayer or HandleStartingNewPlayer

[keen pewter]

Hello, I have a question. If I fire a server event from a client, this server event grabs the servers 'seed' or whatever. How would I go about running an event back on that original client? Do I need to send the client as a variable on the server event and then run the client event with that as the target? What would be the 'client' variable?

This isn't a character or anything, it's a seperate object in the word that needs a variable to be grabbed from the server version of itself on begin play
Also I'm working in blueprint

[fathom aspen]

Exactly as it's written here

[fathom aspen]

Simply send a Client RPC back?

It will execute on owning client

[keen pewter]

Oh, so if a client executes a server only event on an actor, and that server only event fires a client only event. That client only event will always fire on the client that called the server only event?

[fathom aspen]

That client event will run on the owning client of that actor. Also the in order for the server RPC to be sent, the invoking client must own that actor

So the short answer is yes

[keen pewter]

Oh my, okay, I was thinking way too hard about that.... I'm brand new, hour 0 of replication n stuff as you can probably tell. I'll try it thank you 😄

[fathom aspen]

It's okay, we're always here for help. Go for that grind!

I would also suggest you to read the compendium if you haven't done so

You'll find it in the pinned messages

[gleaming kite]

Is player state the best way to "chose" a character? Eg. You have two player states one for the lobby and one for playing, the lobby one is where you chose the character and then when you connect to the server it reads that?

[keen pewter]

I like the sound of that, I will give that a go 😄

[fathom aspen]

Even if you have different PlayerStates, you still have properties to copy over and for that you have inheritance. Both of your PlayerStates will inherit from their parent PlayerState which will have the Character property that you'll copy over. In that class you override APlayerState::CopyProperties and copy that property.

[gleaming kite]

Gotcha, thank you! Seems pretty simple

[woven basin]

How would an Unreal programmer handle dungeon “instances/maps” in multiplayer? I.e. in an open world, some players in mage main map, some in dungeon instances (other maps).

Kind of like what Valheim has with its dumgeons in Unity.

My understanding is in MP you have to have everyone on the one map. So do I just load dungeons in as sub levels in some far away X,Y location and teleport the player there?

Is there a better way?

[winged badger]

can't help but notice a lot of plurals there @woven basin

how many players were you planning on in total?

[crystal crag]

Over 9000

[woven basin]

Like 4

Coop

Maybe even 2

and maybe "instance" is the wrong word - because there would only be one of each dungeon. I guess its more about how you would have dunegons in an open world style in multiplayer, where the dungeon is its own map.

The only way I can think of is the map is a sub-level loaded in far away in the main level.

[winged badger]

well, its that or hard travel

[woven basin]

but I cant do hard travel in that scenario can I? If you have a dedicated server, it needs the main map loaded at all times (Player A in main map, Player B in dunegon)?

[winged badger]

dedicated server can start another instance to run the dungeon

[woven basin]

but that means the players are effectively in different games? i.e. they couldnt talk to each other in that scenario could they?

The more I think about it, the more I think I just need to do "far away" dunegons - it probably avoids all this messy stuff huh?

[winged badger]

they don't need to talk via unreal replication, but yes, they would be technically in a different game

[kindred widget]

I know that ARK:SE just hides their boss rooms under the main terrain. You can glitch out sometimes an see the boss healthbar from pretty far away when someone is doing a boss and you're in the main 'world'. 😄

[woven basin]

haha - ok sick, thats good to know, because that was another reference concept - how ARK 'ports' you to a boss fight and back again.

Seems like hidden far away places is the answer. More importantly, there's not an obvious easy alternative I'm missing.

Thanks all.

[winged badger]

they can be streamling levels

so they don't need to be loaded when nobody is doing them

[kindred widget]

Unreal tends to have a lot of hiding stuff under the main game world concepts. Small closed rooms for rendering stuff with lighting you don't want to affect elsewhere, etc. Is in a ton of their concept stuff.

But yeah, definitely stream them. Just make sure that unlike ARK, you don't load everything blocking. 😄 Entering caves and starting meteor storms with a 15 second game freeze isn't really cool.

[woven basin]

yeah - agreed - thanks - I'll def do that

[woven basin]

yeah - I love ARK, but I know what you are referring to. Hopefully ARK2 is much better 🙂

[winged badger]

that ARK is starting to sound like they did their networking in blueprints 😄

[crystal crag]

A big part of the game is in blueprints, including some networking

[keen pewter]

I have a question just for my brain to understand. Say you had something like an animal spawner, that is randomly generated on your terrain somewhere, and every 10 minutes or so it chucks out an animal.

If a client joined 10 minutes after the animal was spawned from said spawner, how would you go about making the client aware of the animal?

I'm just thinking if the client was there when it happened there would be a server and client side animal in sync
But if he joined after, there would only be the serverside animal

Purely trying to wrap my head around how this kind of thing works, day 0 multiplayer right now

[woven basin]

I'm fairly sure alot of ARK is in Blueprints - based upon their config naming etc that all start with "BP_"

[crystal crag]

I used the SDK and saw so much in BP that I did not expect to find there

[static garnet]

hey people, i wanted to ask, can i have a particle system in a replicated actor? or is that bad and i should have the particles in a separate actor that i spawn with multicast?

[winged badger]

if the Animal was a Replicated Actor iot would do just that - replicate

[woven basin]

If it is a replicated actor - that would occur.

[keen pewter]

So UE knowing that it's replicated it would just spawn itself for the client on the first update to the client?

[winged badger]

you can, you might not always want to, it all depends

but separate actor spawned by multicast sounds a little bit red flaggy

whats your specific use case?

[static garnet]

just a simple skill in a multiplayer game. the main actor of the skill is spawned on server and replicated, but i know you're not supposed to replicate particles and just spawn them locally so im trying to figure out whats the best way to do that

[winged badger]

opening another ActorChannel just for particles would be crazy

you don't replicate particles, yes

[static garnet]

ok, so whats the best practice here?

[winged badger]

but you can, if its a fire and forget

multicast an event in that same Actor that will spawn a particle system

if its stateful, as in you interacted and activated a shield

then you need to replicate that state, and from OnRep, spawn a particle system

multicast will fail for stateful changed, for anyone that is outside relevancy range, as well as for late joiners

[static garnet]

yeah thats what i've been doing till now. but the particle system basically just needs to spawn with the actor and disappear with the actor, so im trying to figure out if i can just add it as a component to the replicated actor or will that result in the engine trying to replicate the particles and big network overhead

[winged badger]

when engine replicated an Actor

[kindred widget]

On a side note. If the skill is an actor itself, and you're spawning it, it's likely that the particle system should just be a part of it and auto activated?

[winged badger]

both client and server create it from the Template - if the template has the PCS

they both have it on by default, no matter if the component is replicated or not

in your case, it sounds like you can put a PCS as a component on the Actor by default

and just Activate it on BeginPlay

as long as your particle system is tightly tied to the lifespan of the Actor itself - you do not need any additional information except for that Actor entered play, or got destroyed

[static garnet]

ok cool. so i can have it just as a component, and the client will just spawn it himself when the actor is replicated to them, right?

[winged badger]

actor spawns with all its default components, always

[kindred widget]

It would work identical to say a Static Mesh component.

[static garnet]

okay. yeah i guess that makes sense. i thought for some reason it would try to replicate the particles over network if i did that but thats probably only if i would check replicate component, right?

[winged badger]

not even then

[kindred widget]

It won't even do that if you replicate the component.

[static garnet]

wait then why do people keep saying dont replicate particles?

[winged badger]

it would replicate the Replicated UPROPERTYs declared on that component

[static garnet]

if the engine doesnt even do that

[winged badger]

which is unnecessary

[kindred widget]

Very likely just repeating something that they've heard. Or attempting to explain something in a very badly attempted manner.

[static garnet]

i see okay

thank you for clarifying then, i really appreciate it.

[kindred widget]

Remember kids! Don't use tick! Set a timer from beginplay for 0.000001 seconds!

[woven basin]

People say to MULTICAST a temp particle effect - because you only need to see the temp effect when it occurs. i.e. if an explosion occurs - you multicast the trigger for it,

Its like the age old Unreal saying: "If an Actor is not in the forest when the tree fell over, did it really play a sound"

(I just made that up - I like it - lol)

[winged badger]

i think we have a single timer for execution order in the entire game

[static garnet]

ahh, i see. so basically dont make an actor if i dont need to. but if im already making an actor for other reasons than i can just put the particles as a component. that makes sense. thank you.

[winged badger]

replicated actors are not free

in fact, too many of those is the best way to murder your network performance

[static garnet]

i see. is... is it bad that im doing two of them for every spell basically?

[kindred widget]

They also take too long. Multicasting an effect from a causing actor that is already replicated is much quicker than spawning a new actor for it.

[static garnet]

i see

[kindred widget]

Depends on the spell though. Really one of those "it depends" areas.

[static garnet]

i guess it was just easier to keep things tidy if i have one actor handle the cast time, chargeup effects, and a second one that is just the effector and actually does the work and can be moved around and resized by the first actor. but i guess im sacrificing network bandwidth to do that, huh?

[kindred widget]

Like. Simple firebolt. Would probably just fake it like a typical gun bullet. Large AoE effect that remains for a while? Definitely new actor for the effect. Buffs? Might not even do more than a multicast from the caster component that creates a UObject with some basic particle and animation logic with buff application.

There's not really a perfectly straight forward way to do them all in one way. Maybe if the game is incredible simple, it won't matter. The more complex the game gets, the more you have to cut each corner to save networking and gametime performance. So.. It depends. 😄

[static garnet]

i see. thats really good to know. i think i need to consider network optimization more than just what looks nice and tidy in the code. i wasnt really doing that before. i guess i'll try to keep things in one actor unless i have a good reason for a second one

so if i need a part of a spell to be a mesh that gets moved around and resized, i should just dynamically spawn it as a component of the first spell actor and manipulate the component, instead of putting it in a separate actor and manipulating the whole second actor from the first actor?

[kindred widget]

Possibly. If you already have one actor for the spell, I wouldn't create a second just for a mesh visual.

[static garnet]

i see. thank you.

[fluid summit]

ARPG multiplayer template (free on marketplace) has a really good start-up skill system ready for multiplayer

you can use that as a example on how to implement it

[static garnet]

thanks

[fluid summit]

thank the guy who created it on the video later on, the amount on work that guy put on that template is unbelievable

[scarlet hinge]

had a system that does work but im trying to change it up

this is on the player blueprint it basically calls fire bullet on server and works

wanted to make guns on their own blueprint tho, not the player one just for modularity purposes

but for some reason this one on the client says click but does not run Server Fire Gun

whereas the original did run the fire bullet function on clients

ive tried replicating the gun to no avail

i could just do the opposite if i need to just like having variables on the gun

[fluid summit]

are you replicting the BP or Component? if you change the events, but don't replicate the actor, it's useless.

[scarlet hinge]

i am replicating the BP

checked replicates

[fluid summit]

Also, maybe using interface would be a good idea (so you don't need to call a specific method for the weapon to fire, you just tell "hey, fire Generic" and the weapon handles it.
If you change the weapon it still works as long as it implements the same interface

[scarlet hinge]

eh maybe

[sinful tree]

Does the client own the actor this is running in?

[scarlet hinge]

probably not

taht did it

set owner

dont really know the best method overall but at least this kind of works

i basically want a scenario of ~6-12 players max and easily variable guns or some structure i can adapt easily

replicating the gun might be expensive tho idk

(on the server load)

[kindred widget]

This is a perfectly fine method. Clients cannot RPC to server from anything except actors that are directly or indirectly owned by their PlayerController. Ownership can only be set on Server. Normal ownership is a client's PlayerController and their possessed pawn.

6-12 guns being replicated is nothing. Call back when you start considering triple zeros in those numbers. 😄

[scarlet hinge]

😬

well im adjusting my game's ambitions to my own inexperience

mainly shooting for 6-12 players at once, each with 1 gun

[fluid summit]

The idea of understanding the concept is great, you may wanna check on the Lyra proyect. It's a multiplayer fps template made by epic

[scarlet hinge]

i might look at it at some point but ive done a lot of these so im just going with what i know

[fluid summit]

https://dev.epicgames.com/community/learning/paths/Z4/lyra-starter-game

[kindred widget]

Generally speaking. Don't stress about problems until you run into them. Don't draw lines in the sand. You'll just hamper your development. The best way to learn is to find the actual problem and figure the way around it rather than avoiding running into the problem.

[scarlet hinge]

interactors would be nice for modularity but im too lazy atm

yeah i just want to at least have a reasonable goal

[fluid summit]

So you are saying a mmorpg?

[scarlet hinge]

no

more like black ops

[fluid summit]

just kidding, don't mind me.

[kindred widget]

I still need to look into Lyra stuff. UE5 has kind of scared me after checking out CommonUI. :/

[scarlet hinge]

will probs use the multiplayer w/ blueprints plugin

ive done steam connection like host / join games but this needs a server-client system with matchmaking

and databasing for stuff like inventory

[kindred widget]

If you're just making a basic shooter. You might be able to get away with blueprints only. Shooters are simple enough games in small settings.

I love blueprint. But it will really hamper game development in a lot of cases. I wouldn't even stick BP only for UI at this point.

[scarlet hinge]

im fine with BP i use some C++ in the form of my "custom plugins" when things get annoying

but something like matchmaking is a lot of code even for C++

[fluid summit]

i would bet there's already some free system out there for matchmaking, i'm a great proposal of not inventing the wheel when you are doing the work. Reinvent it when you already did the work and want to do it again better

Maybe epic subsystem, let me check

[scarlet hinge]

Multiplayer w/ Blueprints is the most popular one i could find

it uses AWS and some other services

hella expensive tho, could probably get a cracked version until i release something

https://www.unrealengine.com/marketplace/en-US/product/aws-cognito-dynamodb-gamelift-lambda?sessionInvalidated=true

[fluid summit]

This is from 2 years ago

https://www.vg247.com/fortnite-matchmaking-services-free-unreal-engine

so i'm guessing it should be free already, but i tried looking for it on epic online subsystem and i couldn't find any doc about it

https://docs.unrealengine.com/4.27/en-US/ProgrammingAndScripting/Online/

[scarlet hinge]

there is a video for epic online subsystems and such but i need a lot more than host/join

also need a secure way to save player info

[fluid summit]

EOS should be able to save player info

[scarlet hinge]

oh it seems to have stuff like that

well ill look into it in a bit

hopefully there r some examples or walkthroughs

[fluid summit]

probably you got in contact with one of the features of the EOS, the amount of features that EOS have for free is quite big, really worth the time checking it

[scarlet hinge]

yeah i dont see it mentioning inventories or user data but it does store purchase info so probably can store other stuff

[blissful saffron]

Is there an example or walkthrough or setting up EOS for sessions, lobbies, matchmaking, etc that anyone knows of?

I've watched a few that are supposed to be for that but they don't seem to be setting it up at all like the website explains or even using the SDK includes, so I think they're just using the online subsystem and not EOS

[latent heart]

There might be some examples in Lyra?

[light iron]

If a component replicates as expected in Standalone and Listen but not Client, what's the most obvious reasoning?

[fluid summit]

that it's not actually replicating i guess, what is your setup?

[sinful tree]

Whatever you may be doing only happens server-side. In Standalone you are the server, so no problem. In Listen server, the first player is the server, so there's probably no problem for the server, but any clients may still be having trouble. When you're running as client, you're connecting to the server with all your PIE windows, so you don't see what happens at all on the server. That's my guess anyway...

Without seeing more of what you're attempting to replicate, best anyone can do is speculate.

[proven fog]

I see that the GameMode and GameState are created before other actors, but do they BeginPlay before other actors?

...I meant to ask that in #cpp but I feel like it's relevant here too.

[light iron]

Well it's a bit long to explain. I took Lyra's health attribute and component and made Stamina versions. That's in c++. I then implemented them to the UI. The actual attributes work on Client. Just not the UI. Though their original works fine. I probably just need to comb through it.

[fathom aspen]

Yes

If you want to see that in action see AGameStateBase::HandleBeginPlay

And GameState is spawned by the GameMode. Also this can help: https://docs.unrealengine.com/4.27/en-US/InteractiveExperiences/Framework/GameFlow/

[twin juniper]

when I go into network mode client I cannot posses any of the players through the client windows. Is there a big part of multiplayer I don't understand and need to know?

[fathom aspen]

You mean possess and detach(F8)? That can only be done using Selected Viewport and not any of the other configurations
Well it can be done using the other configurations/modes, but you can't float around with camera...

[near bison]

Hey guys, does anyone have experience using Unreal with websockets for turn based games?

[dusky flicker]

Get Overlapping Actors doesn't seem to work properly when playing as Client on a dedicated server (array is empty). It works fine if it's a listen server though.

Also it works if I use a line or shape trace. But I need to be able to use the sword's hitbox

It looks like the array is correct for the client, but for the server it's empty. Is it because there's no visual animation for the dedicated server? Because it works fine when there's a listen server.

[thin stratus]

@dusky flicker it's correct that by default dedicated servers aren't ticking animations

If your whole thing there relies on an animation then you will have to change the setting on the skeletalmesh component

Not sure what it's called again though

[peak sentinel]

Would it make sense to listen for PlayerControllr->OnDestroyed (AActor delegate) to understand if a player left to match or not?

iirc they are not get destroyed or something but I might confusing them with player states

[winged badger]

PlayerStates stay around for a few minutes

PlayerControllers are destroyed

but there is also AGameMode:;Logout that will get tripped in the process

[peak sentinel]

ah there is FGameModeEvents::GameModeLogoutEvent for that

thanks Zlo

[winged badger]

PlayerState remains for 5 minutes by defeult in InactivePlayers array

and gets reassigned to the PC if that player logs back in

[glossy kettle]

Zlo beat me 2 it but you should read all of GameMode class, it's got a lot of nice flow pieces for MP

[short veldt]

@here Have any of you worked multiplayer in the pawn class before? I have a few problems and I can't solve it. This is the plugin I use https://www.unrealengine.com/marketplace/en-US/product/photon-cloud-api-by-xixgames

[keen pewter]

I'm back again 🙃

I have a voxel world generator inside of a blueprint, it's inside the world as standard, as I know, it's owned by the server? But there is a version of it on the client?
What I'm trying to do, is the listen server client sets a seed, when he loads, calls an event on the generator with the seed, to generate using the seed
And then when I client joins, get the seed, call the event to generate on his side.

I've tried repnotify seed variable on playercontroller, on repnotify it gets the generator blueprint and does the generator, this only runs on the server and the client can't see anything
I've tried repnotify seed variable on playercontroller, sending a RPC from the server playercontroller to the client character which then gets the generators and runs the code, but again, the client can't execute the code on from what I know is a serverside actor.
Everytime, the collision seems to kind of work clientside, when you jump you jump from where the terrain would be, but you fall through it afterwards.

I've sent myself into such a spiral and confused myself so badly I know I'm missing something so basic...

I'm basically trying to run an event clientside, from a variable that's set on the server, is the only way to do this setting the seed as server, repnotify the seed on the controller, from the controller pass it to the clientside character, the character then spawns their own generator blueprint actors in the right place and then run the code?

I've read through the compendium, and it helped alot with my other stuffs but I've just confused myself so badly on this I've lost my bearings completely (day 1 of network stuff)

[potent cradle]

An actor that is set to be dormant, no longer considers whether it needs to be destroyed on the client on grounds of being out of net relevancy range. It thus lingers around on the client and does not get destroyed/recreated when back in net relevancy range.

Is this something we can override or change?

(ForceNetUpdate does not fix it)

[twilit radish]

I've done something similar except on a smaller scale. I had a maze made out of cubes and planes but the concept was the exact same as you described in the first few sentences. What I did was that I had a replicated actor that would through an OnRep provide the seed to any joining client for that actor and would then spawn non-replicated actors as it's children wherever needed after calculating where everything should go.

Do note that you can totally call code on replicated actors from a client. You just have to make sure it doesn't collide with what the server tells it or make sure the server accepts that.

Some things I would check are:

• Is the voxel actor already there whenever the replicated variable was called on the PlayerController? Or for the RPC.
• Are there no errors in the first place? Have you actually made sure that the code gets called?
• You also mentioned falling through the map when it did work. Have you checked if the server world and the client world are the same? Maybe the seed is somehow wrong or perhaps the world generates differently because of an issue.
• Have you tried looking at the collision from within the editor to see how that is generated?

[gleaming kite]

Can a client load and unload data layers (for only themselves) in a dedicated server?

[twin juniper]

sorry for not replying to your message I fell asleep, but when I play in the network mode it gives me the camera of the players but I cannot control them at all when I click the window

when I play standalone in the viewport I can control the players I put myself onto

[fathom aspen]

This generally happens if you don't have a PlayerController class specified in your GameMode, though this should affect all network modes. With the info you provided I can't tell what's the issue

[quartz iris]

For multiplayer whats the best way to be assigning a team to a player

[fathom aspen]

You prolly mean assign a player to a team. The easy and intuitive way is to have a property in the PlayerState that represents the team he's in.

The teams themselves can be defined in the GameMode

[twilit radish]

Just for reference if anyone else ever sees this. They send me a DM and we talked a bit. The problem was a "HasAuthority" issue somewhere in the code 🙂

[twin juniper]

Hmmm, yeah I can't really explain much more than I see. I apologize I'm fairly new to this. I should learn more about multiplayer and how it works.

[compact talon]

is there any reason to use replicate multicast over replicate server into a separate replicate owning client?

Most times I have tried using multicast it just causes weird issues which are resolved when I have it separated into two different events (one for server, one for owning client)

[chrome bay]

Well Multicast generally means "send to all players this actor is relevant for"

Multicast and Client RPC's have very different meanings

Client means "only send to the owning client of this actor"

[compact talon]

hrm, I see

[fluid summit]

Hi everybody! this is something that someone gave a solution yesterday, but if posible i would like to not use that one in particular.

How do you handle spawning the UI widget for all party members when someone logs in?
Something like this, but as soon as a new controller pops in

i'm having troubles with sync between player controller and player state because the controller just spawned

[kindred widget]

Not sure if typo but a New Controller is irrelevant here. Only concern should be a PlayerState. For that you have two choices. If you're BP only, you tick the PlayerArray in GameState and cache it and == it to see when it changes. If you're using C++, subclass GameStateBase, and override AddPlayerState and RemovePlayerState and add a delegate broadcast. These are called on clients.

[fluid summit]

i'm doing something similar to that right now.
But when i pass the player states to the client to update the UI, they are invalid because the server didn't replicated to the client yet since spawn.

[kindred widget]

Never RPC to set up stateful UI. It relies on the state being on the client. Wait for the playerstate to replicate to the client. Which is when it's added to the PlayerArray and AddPlayerState and RemovePlayerState arre called. At that point you know the new state is valid.

[fluid summit]

I can just do a tick on the UI widget and wait for the playerstate to be ready with a "do once" node.
But it seems like a innecesary overkill, there has to be a simplier way that i don't know yet

[fluid summit]

You mean the arrays on my picture? If i check client side player state after adding to that PlayerState array, it's invalid on the client.

[kindred widget]

The issue with the RPC is that that RPC runs. What if the player instantly disconnects and stuff happens on the server that causes state never to be replicated? Now you have UI waiting on a playerstate that will never arrive. Generally speaking in terms of UI stuff, you'll almost never deal with RPCs. OnReps are your best friend.

Always, always, always display state that the client has and only the state the client has. If it doesn't exist on the client, you have a networking problem that needs sorted out. Server should never dictate this.

[fluid summit]

I did a OnRep from the playerState, but than i ran into the problem that the PC was not ready/replicated yet

hmm okey, let me rethink it with that in mind

[kindred widget]

Are you BP only?

[fluid summit]

At the moment yeah

[compact talon]

In my game when players die they respawn as a dead version of the character. Where should I handle killing and respawning the new actor? I was thinking player state, but I am not sure.

[fluid summit]

I think gamemode should be the place for that kind of things

[twin juniper]

Anyone here familiar with connection setup?

[kindred widget]

You setup can be something as simple as this.

The RowWidget can use Construct or Tick on it's ContextPlayerState to update itself. This container widget that creates and holds them in it's vertical box handles checking the playerarray and removing widgets with invalid states and adding new ones. Then the RowWidget just has to do it's own visuals.

[fluid summit]

that tick checks looks really expensive

or because of invalidate it only checks when it changes?

[kindred widget]

It's not. Identical on array is surprisingly fast.

[fluid summit]

i was trying to avoid spawning the widget from the player state, but that could work.
Let me modify it a little bit

[kindred widget]

From player State?

This has nothing to do with the PlayerStates except that it's passing one into the widget that needs it for referencing. All of this is in a second widget that can just be added to your viewport.

[fluid summit]

oh i see, it's really easy if you just tick on the UI.
I was trying to avoid it but i don't want to waste any more time on this, i'll go with a setup like this and fix it later when i redo it on c++

It was just crazy to me all the workarounds that you need to do something like this on BP. All it's needed is to be able to override OnRep PlayerState on the PC or the GS (By default)

[twin juniper]

Steam server browser connections or matchmaking? Anyone?

[fluid summit]

i'm using advanced session plugin for the connections, it works with steam

what are you trying to do?

[twin juniper]

My problem with my game is that it would not end the connection after host terminates listen server. Sometimes it will leave trace behind forcing players to restart just to fix this.

I can show you on livestream if you wish.

Or you can download and test it with me via Playtest on the game's page.

To produce the same bug.

[fluid summit]

What about using GameMode and on PlayerController LogOut, check if it's listen server, if so, terminate the session of all the other ones conected?

[kindred widget]

Funny enough, functions like this don't even phase me. When you have to tick to update a list of strings, and tick over those strings to test names of people in your party/raidgroup, and handle getting stats via those strings and removing old UI via them. Then you're in badlands. Honestly, the above solution is incredibly clean. It just has the tick stigma, which people need to get over.

[fluid summit]

wait, i don't think you can do that if the server aut is out, the server is done after that.

Let me check it on my setup, i need to add this later on, i may as well just add it now

[harsh lintel]

when I try to connect to a dedicated server through open 127.0.0.1 it works, but when I try to connect to a server hosted on AWS with open <aws IP> I cannot connect to it, I used a tool to check if the AWS server is receiving connections through the port 7777 and it is, am I doing something wrong?

[fluid summit]

i'm trying to replicate this on my setup but i cant.
I'm doing the following
*Create session
*Join that session with another client
*Open another map on the server

After that, all clients are kicked out and moved to the main menu.

I do have in my settup a session killer when you go to the main menu, so this may be ensuring that the host session gets down.

[fluid summit]

That setup looks like madness, why would someone do that o.o
Do you have any link to your projects that i can see? i got curious now

[kindred widget]

I don't have anything personal that is public. I work at Ironward on Red Solstice 2 though. 😄

And for the other question, WoW UI addons API coupled with some really terrible libraries.

[twin juniper]

Did you try to start a new server after terminating session? That is when the problem occurs.

What session killer?

Problem is it will work once (seemingly), and the problem surmises on second attempt to start a new server.

[fluid summit]

I just did and it works okey, i can do a new session agan and the old players can do a new session themself or join

[twin juniper]

Or the last session will not erase from browser.

[fluid summit]

I'm using advanced session pluggin and whenever i change to a map that is not supposed to have a session, i kill any living session just in case.

[twin juniper]

I will try that in the menu level.

Are you also using Advanced Steam Sessions as well?

Not just Advanced Sessions plugin?

[fluid summit]

yeah, steam version

maybe also make sure with this

[fluid summit]

I worked for a "solstice" company a few years ago, but probably not the same one. They are called kin and carta now

[twin juniper]

Will try that.

[harsh lintel]

still need assistance with this

[willow walrus]

what tool, and what did it say

a tool that says "filtered" is telling you that it's a longer response than it should be, meaning that probably a firewall let's someone through

security rules are a firewall, so it might say that even if your local ip isnt authorized

[ashen stone]

Why even if i override prelogin i get this error on my server?

[fathom aspen]

Debug and see what's getting executed?

My wild guess is that you're not using this GameMode

[ashen stone]

It is only happening on dedicated server, i can`t debug it

it is running on ARM64, then i removed EOS from server build but the unique_net_id does not match now

(EOS not works with ARM64)

[ashen stone]

I am because the "Login" is called

[fathom aspen]

[ashen stone]

Unreal is hard

[fathom aspen]

Welcome to the crying club!

[ashen stone]

is it hard for you too?

[fathom aspen]

Is it not? I'm already in that club

[ashen stone]

@fathom aspen i managed to make it work recompiling the project from scratch, it was some c++ cache

👀

[fathom aspen]

Ah then there is still a piece of hope that it's not hard

[ashen stone]

Yeah, it is easy

C++ is hard not unreal

[harsh lintel]

the tool is called netcat and the result of the command nc -v -u -z -w 3 <IP> <Port> is Connection to <IP> <Port> secceeded

[harsh lintel]

Duly noted, I can't believe I need steam libraries for the server to work q_q, but I can connect to it now

[pallid mesa]

Just updated my pinned comment with another new article: How to replicate thousands of Actors efficiently. Some of you might be interested. Big thanks to Zlo and Jambax tbh

[pallid mesa]

hah

[twin juniper]

I keep hearing that you have to set up multiplayer first in your project or else you'll have to rewrite the entire game. Do they mean before you do anything at all?

[pallid mesa]

yes

[velvet jacinth]

Hey guys!
Does someone have a method for changing the player character (or default pawn class) to create a working character selection?
Kinda lost here, searched on every google result didn't found a solid one to work.

[twin juniper]

Thank you vori.

[quartz iris]

How can I make it so one button either creates a server if there's no players online, or joins any server with players in it

[crystal crag]

What tech is typically used to push notifications to a dedicated server from your cloud? For example, you have a custom party system that is available from the main menu screen. You want to receive notifications from your private cloud when a player sends an invite. Sure, you could poll a web service when on that screen every X seconds, but it seems like there should be a SignalR-like equivalent for this type of situation.

I guess I shouldn't have said dedicated server

I should have just said "game"

[quartz iris]

There's no cloud database

It's all through peer to peer

With steam

[crystal crag]

I wouldn't be using P2P though. This would be a custom system.

[quartz iris]

Why not?

I can't afford dedicated servers atm

And the max lobbies are 8

GTA servers are peer to peer and run 30 players

[crystal crag]

Not trying to sound rude, but you not being able to afford dedicated servers doesn't really apply to my question. I think you might be locking into the specific example I gave as "This is what I am exactly trying to do" when really I was just asking what tech stack is used for more real-time communication between your services and your game clients / servers

and I am not using lobbies

[quartz iris]

I don't know what a tech stack is

[crystal crag]

a "stack" of technologies in which are used to provide a solution to a problem

[quartz iris]

Ok

[kindred widget]

Out of curiosity. Why not simply find all sessions. Filter them and choose one randomly?

[half umbra]

Hi, why i can't hover and click 3d widget on multiplayer? On server and on Client doesn't work, when i open 1 window then is ok, but when i run it on client and server then doesn't work

[quartz iris]

How can I do this?

[kindred widget]

Take the Found Sessions array you saved. Iterate over it to see if it has a session the player could join. If no, create a new session, if yes, join the session.

[half umbra]

Did you find solution?

[quartz iris]

Is the gamemode already on the server?

[whole leaf]

It's been a while so I'm not too sure what I did but yes.
Apparently it's related to the pointer index, here's a post about it : https://forums.unrealengine.com/t/bug-widget-interaction-in-multiplayer/402548/4

Screen is how I implemented it in the player

[quartz iris]

How can I Iterate over it to see if it has a session the player could join?

[kindred widget]

Dunno. Depends on your restrictions. If game size is the only one, then your session struct needs that info and you need to check it.

[quartz iris]

I only need the max server player count

[kindred widget]

I don't have advanced sessions installed. Can you get that info out of the session struct?

[quartz iris]

I don't think so

From the find sessions advanced node?

[glossy kettle]

@pallid mesa yea replication graph is cool and all but have you ascended to EnTT yet

[quartz iris]

There is a filter session results

[pallid mesa]

more like #mass

[glossy kettle]

oh is it

[pallid mesa]

soon™️

[glossy kettle]

thought it was (m)ass

[kindred widget]

Dunno then. If the data isn't in the struct. You have to put it there somehow. Likely through a parameter string or array. If I recall advanced session has that option.

[pallid mesa]

🇧 ass

[quartz iris]

How could I detect the amount of players

[glossy kettle]

you'd still need to write a custom net driver to replicate more than 3 of those thicc 2kb actors tho

[kindred widget]

In the game that the session is in?

[quartz iris]

Yeah cus they i can kick them if they try to join and its at the max

[kindred widget]

If memory serves, Unreal has a player count in place already.

Maybe not. Can't remember.

[pallid mesa]

not actors tho

[pallid mesa]

entities with fragments are by design lightweighted so

[quartz iris]

This should be able to do it ?

[glossy kettle]

are they based on uobject

i havent seen it at all

[pallid mesa]

take a look at the docu in #mass pinned

[glossy kettle]

300 bytes for a uobject in this economy?

[pallid mesa]

UScriptStructs

so underlying UObject

https://github.com/Megafunk/MassSample#mass-entities

[glossy kettle]

thx i will read..

[pallid mesa]

i wrote that with Karl

live Q&A in the #mass channel

[kindred widget]

No idea. Don't know what filters takes.

[quartz iris]

I need to ask this question again

How can I make it so one button either creates a server if there's no players online, or joins any server with players in it

But for Advanced Sessions

Is anyone and expert on this?

[dark edge]

Do you know how to get active session?

[quartz iris]

No

[dark edge]

Start with that, figuring out how to find sessions in action already

[quartz iris]

Should I be setting the player controller or player character to a character variable which holds their role

For example

When the gamemode starts

[pallid mesa]

no

[quartz iris]

Attacker 1 2 3 4 vs Defender 1 2 3 4

?

That way I can make a scoreboard

[obsidian cargo]

How well does the "Bad" network emulation profile for PIE approximate real life poor network conditions?

I tried doubling the latency and packet loss on "bad" and noticed player movement degrades much more rapidly than the stuff I'm replicating.

Is there anything additional I should use to validate I'm handling poor network conditions correctly?

[winged badger]

live test on a packaged game 😄

[winged badger]

you should not be using those at all

GetPlayerController[Index] i mean, they have a way of biting you in your arse when you don't know exactly what you're doing

[quartz iris]

Then what do i use?

[latent heart]

None of what you just said is a thing.

[glossy kettle]

@pallid mesa does this count as multiplayer https://github.com/cryptolok/BusAsM

[raw thunder]

How much performance are we loosing by increasing the PlayerState net update frequency? I would like to have my inventory and attributes stored on the PlayerState and not the PlayerCharacter for repawn purposes. My game is a listen server mode for maximum 5 people. I would like to increase it to something similar to the Character net update. Is this a bad idea?

(I am using the GameplayAbilitySystem and I am storing it on the player state)

[pallid mesa]

it'll be fine as long as you delegate things to your pawn

ie: the gc system

you can cull cues using your pawn relevancy

since ps's are always relevant

but to be frankly the scope of your game is smol

so my main recommendation us to measure your performance before you take decisions that will require further engineering