#multiplayer

1 messages · Page 657 of 1

wise bridge
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I have tried with friends, with the game packaged and shared, on steam test server, with a host and everyone having more than 200 fps constant. The 10 fps for actor is just out of my mind (and their obviously) because the framerate of the other actors is really far lower from what it should be

bitter oriole
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So one player is running a packaged game and has 10fps on their machine ?

thin stratus
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Pahaha, they had bugs cause they used RPCs for State.

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Man, Valorant is just a box of beginner mistakes in terms of UE4

chrome bay
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RIP

wise bridge
pastel pivot
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well it is made by UE4 beginners in a sense, so yeah :p

thin stratus
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"Hey let's make the camera also a Hero Character so that we can just possess it."
5min later. "WHY IS THE CAMERA SHOOTING AT US WITH A WEAPON?"

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(still one of my favorite bugs)

bitter oriole
pastel pivot
wise bridge
bitter oriole
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Where is the server running ? Dedicated server, or listen server ?

wise bridge
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Listen server

bitter oriole
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And what's the uplink bandwidth for the player hosting ?

wise bridge
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200mb/s

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From my operator

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Not unreal

bitter oriole
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Interesting. I take it the client has a solid network connection too ?

wise bridge
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Not as good as mine, but yes it was good too

bitter oriole
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And low ping while connecting to you - not doing this across the planet ?

wise bridge
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Yes, we are near, without high ping

bitter oriole
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Normally if you haven't added a lot of additional replicated objects this should work pretty well, assuming you haven't done any custom input or dynamic speed changes and stuff like that

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So maybe it is the default bandwidth

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Try that in DefaultGame.ini

[/Script/Engine.GameNetworkManager]
TotalNetBandwidth=32000
MaxDynamicBandwidth=7000
MinDynamicBandwidth=4000

wise bridge
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Wait a second I'm restaring ue

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It seems better thanks you !

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And do you have something to help me in the future, when I would like to correct all the issues about latency/package lost?

bitter oriole
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Not sure what's the question here

wise bridge
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If ppl have a "high ping" things are getting really weird

pallid token
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Calling an RPC in a delegate of InputComponent->BindAxis() feels wrong is this wrong? It's basically calling and RPC from Tick().

bitter oriole
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It's not wrong as long as it's unreliable, and limited in scope

grizzled stirrup
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Depends what the RPC is

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CMC does it a lot

bitter oriole
pallid token
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I'm just trying to get my Character to match rotation on all clients.

grizzled stirrup
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Just have them set a replicated property

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No need for an RPC

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Then have other clients lerp to that rotation

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On tick

pallid token
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Yeah, but I have to rotate the character on the server, somehow.

grizzled stirrup
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I believe there's already a replicated property for rotation on the server, one second

wise bridge
livid sluice
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Hey guys sorry to interrupt. Just a quick question. Is it wrong for this data flow to happen? Client Function ->Server Function-> Client Function

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I basically need to wait for the server to finish that function before I can call the client function again.

pallid token
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Years ago, I was told not to stack RPCs. Not sure if it's still wrong.

grizzled stirrup
pallid token
grizzled stirrup
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I'm doing this on tick in the Character

# 
            // Replicate the view pitch of this player to everyone else
            FRotator CurrentRot = FRotator(CurrentViewPitch, 0.0f, 0.0f);
            FRotator TargetRot = (GetControlRotation() - GetActorRotation()).GetNormalized();
            FRotator FinalRot = FMath::RInterpTo(CurrentRot, TargetRot, DeltaTime, 5.0f);
            CurrentViewPitch = FMath::ClampAngle(FinalRot.Pitch, -90.0f, 90.0f);
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On the server

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CurrentViewPitch being the replicated float

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That float gets passed into the AnimBP

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To drive the aim offset

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But if you only need yaw rotation replicated then it shoudl work by default with replicating movement set to true

pallid token
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Still not working, but I figured it out. So, my character is a 3rd person character with a spring arm, so the mouse rotates the spring arm. When I hold a button to strafe (Block, or draw bow depending on the loadout), The character rotates with mouse movement. Because of the latency, if I'm rotating when I right click (to strafe) the delay causes the client rotate differently than the server for a fraction of a second.

livid sluice
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Guys sorry to repeat a question but. I have a client function which calls a server function which check a condition and calls client function again. so its Client ->Server -> Client. Is this wrong to do?

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Because I cant think of another way to do this

bitter oriole
livid sluice
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The client picks up an item, the server then checks for space and if not the client receives a call to drop the item.

bitter oriole
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Looks fine to me

livid sluice
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Thanks.

spice skiff
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Anyone know a way to replicate instanced static mesh ?

kindred widget
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@spice skiffPut it in a replicated actor, set it to replicate.

spice skiff
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it doesn't work when spawning in run time

kindred widget
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I did it via FastArrays. Component had a FastArray, which was given a local space vector among a couple other things. PostReplicatedAdd added a new instance to the ISM on each machine individually. Though I never did find a decent way to handle the ability to allow characters to walk on it.

spice skiff
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yeah i have it working spawning instance/comp on each machine individually, although getting JIP working with that is a nightmare, gotta be an easier way

peak sentinel
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So I was using a timer-based prediction system for projectile spawning on my weapons, its basically like this on my HandleFiring function:

SetTimer(TimerHandle, this, AWeapon::SpawnProjectile, blah blah);
Server_SetTimer();

But turns out this logic is not working with my projectile pooling system. I want to merge to burst-counter system (ShooterGame one) that checks firing with OnRep function, my question is my game is not a bullet hell type but I spawn projectiles in a very high rate, like each 0.1 secs. Would burst-counter system flood the bandwith usage?

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Normally I was hiding the server projectile from firing client, but pooling system made that impossible. Now I want to exactly merge UT's predicted projectile spawning system

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That way I will not have to deal with visibility of the projectile meshes

peak sentinel
chrome bay
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the counter won't be the bottleneck, it'll be replicating newly-spawned actors

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Spawning actors is by far the most expensive part

glass vector
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if a nonplayer actor (ie magazine) gets attached to a player controlled pawn, does the nonplayer actor have the player controller as the owner?

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using the BP node attach actor to actor

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must attach actor to actor be called on server?

dire cradle
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if it's just for visuals on client side no

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anything other yes

glass vector
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does the nonplayer actor's owner get auto set to the player?

foggy idol
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I think their owner value remains nullptr and for replication sake they’re owned by the server

foggy idol
primal isle
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any good tutorial out there to help me make a lobby in which i will select teams character?

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all i can find either is filled with bugs, the teams are saved in a string variable or it has too much stuff around that i dont need and cant figure out a way to not use it

foggy idol
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Save the teams as an enum or string

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Then have some kind of backend for translating the enum client side

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Like enum option 1 = team red

hollow oar
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Hey Guys, anyone know the correct way to increase the max player cap on servers? right now it defaults to 16, (which is another question, I don't see where in the code that is happening, or what config it is loading to have that default value)

narrow skiff
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@hollow oar
Inside DefaultGame.ini
[/Script/Engine.GameSession]
MaxPlayers=100

hollow oar
# narrow skiff <@!266188246361440267> Inside DefaultGame.ini [/Script/Engine.GameSession] MaxP...

thanks - wasn't sure if that was the "correct" way, and was especially confused how the engine was defaulting to 16 with that entry not in the .ini file... I tried to breakpoint walk back to where it was set in the code, but it was saying it was loading from a config, and the class it was using was fairly generic so i couldn't trace back that class's initialization to see where it was coming from

narrow skiff
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Also are you using the Create Session blueprint you can change the Public Connections on the node

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@hollow oar

hollow oar
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no i am currently not - i started off the 3rd person mp project, so i am getting default behavior I guess?

waxen breach
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Hey guys, so i'm getting a little desperate rn because I have gotten no info on this yet, please bare in mind as well that i'm very new to making multiplayer games, so here goes:

I want to make a menu where the player, using a widget (in VR) can input a code, and enter a lobby based on that code, for instance, a room code could be (1234) and if another player inputs 1234, they will join the same room

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I'm really bad at this so i'm sorry if this is not doable

narrow skiff
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Ahhh well if you ever end up using the create sessions you will be able to remove the MaxPlayers in the INI and just use the public connections

hollow oar
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I will look into that as my next step then 🙂

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it would be better to have some sort of programatic control of it

hollow oar
waxen breach
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Oh, hm, my main issue is that i've never done anything involving networking before, i have the replicating set up but i know nothing about connecting servers

hollow oar
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gotta start small then

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first just try to get a client that connects to a server based on a login or something

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are you new to making games in general?

narrow skiff
waxen breach
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I just need to figure out how to do multiplayer and such

hollow oar
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cool, then lets break down the steps

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im guessing you want this to be online?

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(over the actual internet, not just on a local network)

waxen breach
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Yes, my goal is to have the game be accountless, where you just input a code and you're ready to go

hollow oar
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Ok well, the first step would similar to what I've done so far

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im streaming at the moment, if you want to load it up, it will be easier to show

waxen breach
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Oh yeah definitely, just excuse my voice if i do talk, i'm a highschooler so i sound quite young

hollow oar
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thats fantastic honestly

narrow skiff
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Have you thought about Beacon System? @waxen breach

hollow oar
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great on you for doing something

waxen breach
waxen breach
hollow oar
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^^ I too don't know (unless its the system you were working on @narrow skiff )

waxen breach
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I'll be in Programmer Parlor by the way if you wanna talk there and show anything

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Ohh okay like

hollow oar
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ah, that way

waxen breach
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i thought you meant discord stream

hollow oar
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haha i meant a regular one, but i get the confusion

narrow skiff
waxen breach
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Alright i'm in

narrow skiff
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Its lightweight way to connect to users

waxen breach
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So technically speaking what if i were to use an amazon server?

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Thank you so much for that, genuinely!

hollow oar
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@narrow skiff do the beacons ... like register to some server out there, and then that server matches up the host/client beacons? If so can I set it up for my own PC to be said server? (still reading up on this / watching videos )

hearty vine
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can I safely override CalcVelocity (slightly change how the friction get's applied) in character movement and it not mess up the netcode?

hollow eagle
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probably fine, there's no special handling for networking in that function. I'd expect it's called on both clients and server so results should be the same across both, as long as you aren't relying on data exclusive to one or the other.

hollow oar
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ahh init client is likely what i want... neato.

rotund onyx
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I need a client to get the other players' player states so that I can update the HUD with current players. How can I do this?

bitter oriole
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Get player states from the game state

rotund onyx
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will that work on a remote client?

narrow skiff
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You can do it the listen server way so you don't have to use dedicated server resources and save it for actual gameplay

Meaning
The host will be the listen server and clients can join up on that server and then do a server travel to bring all clients into a game to the dedicated server if you plan on using a dedicated server @hollow oar

bitter oriole
rotund onyx
wind dirge
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anyone seen DataAssets working fine in editor / standalone but then seem to magically disappear in build ?

bitter oriole
wind dirge
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Well my level traversal is totally broken in builds. Plenty of hard references to them

hollow oar
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So I guess with the "session" approach, I am having trouble understanding how "joinsession" will know the IP of my dedicated server (I am sticking with a pretty separated "deicated server" approach.). Right now i just have my server opening a level, and the clients "Open Level" with the IP of my server. This feels a little basic so i was looking into "sessions" but every think i see a about themseems to be using them on a local LAN not over the ineternet, so i never see any IP being used

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hey Tides, I am not quite sure where you are at

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but there is an option to package up your server

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so I've done that, then moved it to the server computer and had it run. I then use "Open Level" with the IP/Port of my server and it connects fine

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only if your connect part was hard coded

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if it had some text entry to take the server, you could just type it in

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decicated server

tacit bough
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I forgot the command but I remember you could connect to a running session via a console command.
It was something like join IPADDRESS does someone know what I'm talking about?

hollow oar
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I don't remember that in particular, because from the beginning i've been using the unreal editor from compiling the code XD

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but yes, you can go to github, download the whole source code (if you don't want to set up git), compile it and run unreal editor that way

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i think there is a free level on AWS, but amazon is evil so if you can find another free one use it haha...

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ubut i am literally just using my own PC as a server

twilit radish
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"free" is never really free 😛
There's always the catch to lure you into their platform or something else.

hollow oar
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not entirely wrong

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because of ISP issues, I had to use portman.io to help set up my local server

narrow skiff
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@twilit radish Yeah "free" only last a year then they start charging you per instance depending on the region of the server and how many users are on the server and how long the server was running (They charge per instance and Per Region also)

hollow oar
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It seems sessions are only applicable to online subsystems? IE if i am running my own server do I need to write my own online subsystem if I wanted to use Sessions?

narrow skiff
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You can use the Advanced Sessions

hollow oar
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the plugin?

narrow skiff
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Yeah

rotund onyx
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can clients reference data from the GameMode or only the GameState?

twilit radish
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GameMode is server only.

narrow skiff
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GameMode only exists on the server. as GameState is both Server and Client

twilit radish
hollow oar
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looks to me like what I want to start implementing is beacons to manage loading into possible instances etc. Sessions seems to be something more about interfacing and hosting games via steam etc

waxen breach
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still struggling with making a menu to hosting a server

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i have no idea what i'm doing rn

narrow skiff
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You can use the Sessions without steam also @hollow oar

hollow oar
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i can use them on a local LAN, but i see nowhere to connect the session stuff to my own server, aside from implementing my own online subsystem

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unless i am missing something

narrow skiff
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Thats what I did was make my own Subsystem ends up being 103 files and almost 10k lines per file not counting the Party information and everything else

waxen breach
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are there any good templates i can use the widget of?

sage isle
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Hey there, I am kind of new to the multiplayer stuff so I am kind of getting the feel for networking and what not. I would love some tips on getting started as I wanted to make something where you can swap between various characters but am struggling to get started

pliant vapor
narrow skiff
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Is it replicated @pliant vapor

pliant vapor
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the spring arm camera or something else?

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i tried this but it didnt fix anything

unknown.png
narrow skiff
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Multicast

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@pliant vapor

pliant vapor
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i switched it to multicast

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i switched that pitch node to multicast idk where else i can change that option

narrow skiff
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Your in the Character BP huh move it to the Player Controller

pliant vapor
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i never made a player controller bp

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lemme try

eternal canyon
pliant vapor
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Yeah

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I never touched that stuff before

waxen breach
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I still need help on how to make the menu for my game that allows players to create or join servers

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how do i do this?

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I wanna do it using widgets since this is a VR game

lost inlet
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You’d do it with widgets if it was a flatscreen game?

waxen breach
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Oh yeah i know but

lost inlet
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Though this is what the online subsystem is for

waxen breach
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what i mean in this case is that the player would be using pointers attached to the controllers

lost inlet
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And the online subsystem is what abstracts the online service you do use into a nice common API

hollow eagle
waxen breach
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i think it's online subsystems but i don't wanna use steam or anything

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I just literally have no idea what i'm doing here and all i need is some sort of walkthrough of what i'm trying to do without drawing a widget to the screen, it has to all be in 3d space

fossil spoke
pliant vapor
true karma
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How do you get a passenger in a possessed vehicle to use the same camera the driver uses?

fossil spoke
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SetViewTarget is one option. Though keep in mind that if your attempting to view exactly what the other Player is looking at, it wont work how your expecting.

Capture.JPG
true karma
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Thanks! Even if they're both using a camera that's a component of the vehicle?

fossil spoke
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If you want the passenger to control the view independently, you will need to handle that yourself.

true karma
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Ok cool thanks!

narrow skiff
pliant vapor
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yeah thats where i struggled i couldnt figuere out where to put it

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thanks

final flower
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hi guys,I have a question to ask:
Run the game first. When the ue4-editor loses focus, the game will freeze(the FPS will very low).
This problem caused the client to behave abnormally, in the "Play as Listen server"

bitter oriole
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That's normal and you can disable it

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Look up "background" or something in editor settings

final flower
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how to do that?

kindred widget
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It's named oddly since it usually affects FPS, but it's Use Less CPU When In Background.

bitter oriole
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PIE isn't very useful for multiplayer

final flower
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here?

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oh,it works! thanks!

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So how do you usually test multiplayer games？package ?

fading birch
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You can test in PIE just fine.

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Some stuff behaves differently in a packaged build though.

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Usually I test PIE to ensure functionality is working as intended, then verify in a packaged build

final flower
fading birch
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yes of course

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you should ensure stuff works on a functional level in pie

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and then verify nothing weird happens in a packaged build

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that's fairly standard

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you can also write automation tests for your packaged games if you really wanted to

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but that gets convoluted quite quickly

final flower
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ok,thanks!

bitter oriole
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Once for client, once for server

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You can script it etc

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Less practical but also a shitload more representative of actual gameplay

final flower
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oooooh，It can be used like this, very useful, thank you! !

bitter oriole
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Just needs your game to have sessions set up

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But you'll need that some day anyway

kindred widget
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While we're on the point. There isn't by chance a way to delay or add in a new PIE client session after having started a server one, is there?

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Cause that sounds like an incredibly useful tool that I can't find much on. Would make testing replication state conditions infinitely easier.

bitter oriole
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Don't think there is, and tis is why you don't use PIE for more than iteration

empty axle
kindred widget
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More or less.

empty axle
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There is something like that

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I will find it and post it here, maybe that is what you want

meager fable
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Is there a way to add options without opening a level? I would like to start a listen server without loading a new map

unknown.png
empty axle
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@kindred widget Editor preferences and search for "allow late joining"

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Then after you start PIE there will be a button in place of usual Play button to add new client

kindred widget
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Oh, that's neat. I wonder why that isn't enabled by default.. I suppose that might confuse singleplayer game makers though.

thin stratus
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You can however start it directly with listening and then later open the session

empty axle
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Yeah, game changer feature for me if you want to test late joining. And it is there from at least 4.21

meager fable
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thanks

silent valley
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that's awesome

kindred widget
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@empty axle That is absolutely fantastic. 😄 Hotjoin testing cut from an hour to five seconds.

rough kestrel
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So I overode the logout function in game mode and reloaded the level when the total player count is zero for the next session that would take place there. But for some reason, the dedicated server does not do this consistently (worked fine in editor).

Also how would one handle joining players during server travel?

steady musk
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Hi guys. Is there any detailed log for dedicated server? Cause rn its falling for no reason and log dont have enough info

unknown.png
bitter oriole
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Debug it

steady musk
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Probably the best advise in such cases

bitter oriole
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Any time you have a crash

rough kestrel
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anybody here has used vivox core? I managed to get voice chat to work in echo mode to work via rift but I am not able to get voice chat to work in quest 2

bitter oriole
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You keep asking and no one answers so clearly not

rough kestrel
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☹

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someone yesterday did help me set it up

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dunno who

dusty bloom
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@rough kestrel go to eeldev's server hulken will help u there

silent valley
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Different VivoxCore I suspect. The official Vivox SDK integration is also called VivoxCore 🙃

marble rune
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Thoughts on Nakama, is it a good alternative to Epic Online Servies & PlayFab?

rough kestrel
rough kestrel
dusty bloom
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oh xD

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i thought you reffered to the vivoxcore plugin pepeLaugh

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on the marketplace

rough kestrel
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nope making our own as we are using source version of 4.26 plus eant to be able to update on demand. Made a plugin to make bp accessible functions for use.

primal isle
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what is the best way to set up 2 teams in order to have access to the players in each team to be able to create scoreboard and team only chat and stuff like that?

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would a int variable in the game instance 0 and 1 be able to do all that if i set them from a widget when they select the team? or is there something better?

rough kestrel
weary saffron
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Hey guys!

I want to send the values of the players from the lobby to the game. Team, skins, weapon... etc.
How can I save these values in a game server instance for each player?
And how do I know in the game to whom which values belong?
I don't want to be dependent on the player's name.

unknown.png
thin stratus
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The Lobby is already on the Server, or?

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If so, use SeamlessTravel and save the data in the PlayerController/PlayerState

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And use CopyProperties in the PlayerState and OnSwapPlayerControllers in the GameMode to move data back and forth

weary saffron
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@thin stratusYea. On serve. Should I use PlayerController/PlayerState like Lobby?

thin stratus
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Sorry?

weary saffron
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LobbyPlayerController and GamePlayerController.

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It is the same?

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@thin stratusOk. I trying.

thin stratus
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Well

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I would make sure that you have a common parent class

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That has the data that these two share

weary saffron
hollow oar
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Can you programmatically start up a dedicated server? For example, have a dedicated server start up another server?

narrow skiff
thin stratus
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You are basically just starting a process

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UT does that when playing private matches

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They just launch a dedicated server in the background

hollow oar
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I'm having trouble figuring out the blueprint or C++ calls associated with it at the moment...

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and my google foo is apparently weak on the topic

thin stratus
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Well you can try finding it in the UT source code

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It's just some platform process run stuff with path to the exe I guess

hollow oar
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not a bad place to start looking. I am hoping they already have something implemented so I can keep the code as platform independent as possible (if if someone on a mac wanted to run a dedicated server, as long as I exported to mac it will work (likely with some bugs, but I think you get the point)

weary saffron
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@thin stratus
I created parent classes.

  • GameMode (with "Use Seamless Travel")
  • PlayerController
  • PlayerState (with variable of team)

Then I created child classes.

  • LobbyGameMode and BattleGameMode
  • LobbyPlayerController and BattlePlayerController
  • LobbyPlayerState and BattlePlayerState

In the lobby, I write the team for each player and then do "server travel" to Battle map.
I still can't get the value from the lobby.

Next screenshot of the Team in the lobby.

unknown.png
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@thin stratus
The next screenshot is the players in the game.
All players from team A (default value).

unknown.png
thin stratus
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Well did you move the data over with the functions I mentioned?

weary saffron
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@thin stratusI found solution. https://forums.unrealengine.com/t/how-to-use-aplayerstate-copyproperties-with-seamless-travel/148560

Unreal Engine Forums
How to use APlayerState::CopyProperties with seamless travel?

Hey, I’m working on an asymmetrical game (similar to dead by daylight), and I want to transfer the player’s role (enum) from the lobby to the game level. This role is used to determine which character to spawn for the player in the game level. Is the copy process supposed to be a “two stop” logic? So I should copy first from Lobby to Transition...

meager spade
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@kindred widget there is

coarse flame
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is there a way to ping a server to check if the server is online or not?

rough kestrel
coarse flame
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Alright thanks dude

vague spruce
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does anyone remember the console command to display replication errors?

silent valley
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I've never heard of that method. Normally you would make a Server package, either from the editor or via command line.
However, for this to work you need to compile engine from source I'm afraid, as the Epic launcher version does not come with the ability to package server.

tribal sail
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anyone know how a character can be destroyed on the server but still exist on the clients?
I'm destroying a character on death by setting its lifespan and it is destroyed fine on the server but persists on the clients.

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@tulip ferry is your variable bServerIsSprinting set to replicate?

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can I see your declaration of that variable?

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that might be your problem. by default, variables only exist on the client

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so your server has no clue what that variable is

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you have to set it to replicate

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UPROPERTY(VisibleAnywhere, Replicated) bool bServerIsSprinting = false;

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also i'm not sure your StartSprinting and StopSprinting functions are running on the server

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try this refactor
`UFUNCTION(Server, Reliable)
void ServerRPC_Sprint(bool bNewSprint);

void Sprint(bool bNewSprint) //add this function. this is the function that will issue the RPC

// CPP file

void ABaseFPSCharacter::ServerRPC_Sprint_Implementation(bool bNewSprint)
{
Sprint(bNewSprint);
}

void ABaseFPSCharacter::Sprint(bool bNewSprint)
{
GetCharacterMovement()->MaxWalkSpeed = bNewSprint ? SprintSpeed : DefaultWalkSpeed;
if(GetLocalRole() < ROLE_Authority) //if this is true, this code is running on the client. send the RPC
{
ServerRPC_Sprint(bNewSprint);
}
}

void ABaseFPSCharacter::IStandardFpsCharacterFunctions_SprintInputBegin()
{
Sprint(true); //remove server call from here
}

void ABaseFPSCharacter::IStandardFpsCharacterFunctions_SprintInputEnd()
{
Sprint(false); //remove server call from here
}`

#

wow that came out weird

#

anyways

#

your syntax was a bit funky so it's a bit tricky to decipher what's going on.

#

so this refactor creates two sprint functions. One runs on the client and one runs on the server. You could just as easily make two separate functions like you had, one for stopping sprint and one for starting. But this keeps the RPC's to a minimum. You simply send a bool with the new sprint state.
The sprint function sets the maxwalkspeed variable depending on the bool, then checks to see if it's running on the client (which by default it is). If it is, then it issues the Server RPC. Then the server simply calls the Sprint function

#

no problem!
Keep in mind that the server is authoritative. If there is a discrepancy, the server wins

#

but good on you for thinking of these things early on!

humble meteor
#

So been having issues all night with trying to replicate a struct only to find out the issue is because Maps can't be replicated, DOH! MY question is, what are people's workaround for this? Do you break the maps into arrays of Keys and Values and replicate those to reconstruct into a map once replicated or just avoid using Maps altogether?

cunning condor
#

Anyone got any clue why connecting to a dedicated would throw this:

 Assertion failed: Channels[ChIndex] == nullptr [File:E:/workspace/Unreal Engine/Engine/Source/Runtime/Engine/Private/NetConnection.cpp] [Line: 3272]

Guessing this is related, can't figure out why playercontroller / unique id is null. Building from source on UE5.

[2021.08.19-22.59.50:251][  4]LogNet: Server accepting post-challenge connection from: 127.0.0.1:61988
[2021.08.19-22.59.50:253][  4]PacketHandlerLog: Loaded PacketHandler component: Engine.EngineHandlerComponentFactory (StatelessConnectHandlerComponent)
[2021.08.19-22.59.50:253][  4]LogNet: NotifyAcceptedConnection: Name: ServerInit, TimeStamp: 08/20/21 00:59:50, [UNetConnection] RemoteAddr: 127.0.0.1:61988, Name: IpConnection_2147482497, Driver: GameNetDriver IpNetDriver_2147482504, IsServer: YES, PC: NULL, Owner: NULL, UniqueId: INVALID
[2021.08.19-22.59.50:254][  4]LogNet: AddClientConnection: Added client connection: [UNetConnection] RemoteAddr: 127.0.0.1:61988, Name: IpConnection_2147482497, Driver: GameNetDriver IpNetDriver_2147482504, IsServer: YES, PC: NULL, Owner: NULL, UniqueId: INVALID
oblique prism
#

If a replicated actor is destroyed on the server, you would expect it to destroy on all relevant clients wouldnt you?

fading birch
#

yes

rotund onyx
#

Hello multiplayer chat, I am once again asking for your assistance.
I am trying to get the players' UI to update when one player presses a button. Currently I am going Widget->Controller->PlayerState->GameState->Get All Player States->???

#

I thought I could grab the controller from the player states as the game state and call a client function on it from the server, but that doesnt seem to work

#

the game state definitely gets updated though

#

so I can go one way

fading birch
#

Is the player changing something about themselves? You can just handle that in the playerstate and replicate it.

rotund onyx
fading birch
#

you can do it in an on rep

#

then broadcast a delegate

#

or, have them already watching the value on their UI and it'll update when it reps

#

for example, this is what I do for a person changing their team color:

unknown.png
#

my gamestate function is a multicast

rotund onyx
fading birch
#

ah you're on BP

#

OnRep = RepNotify in BP

weary saffron
#

Hey!
How can I block players from joining after a match has started?
I use AdvancedSessionPlugin

unknown.png
rotund onyx
#

I'm no good at reading C++ sorry
Is the repnotify located in the Player State? How do others access the repnotify?

fading birch
#

RepNotifies are ran on each client that's relevant to the actor

rotund onyx
#

so where should the variable be located?

#

I could see putting it in the Pawn, Controller, or PlayerState, but I don't know which

fading birch
#

I store mine in the player state.

#

I ensure it's broadcast to all players via the game state

#

since the gamestate is definitely replicated to all players

#

and another player may not have the player who changed their team color be network relevant to them.

#

ie, across the map outside of the replication range

#

but if I send it to the game state, which is always relevant, they'll get the update.

rotund onyx
#

I've never used repnotify before. How is it set up?

fading birch
#

in BP i'm not sure how RepNotifies give me a minute to familiarize myself

#

ok

#

so essentially a RepNotify allows you to execute functionality after a variable has been replicated.

#

so in my case:

1. Client changes team color
2. Client tells the server it wants to change team color
3. Server changes the team color and calls the OnRep function, forcing the variable to replicate
4. The OnRep function grabs a reference to the game state and calls the NetMulticast function to tell all players that the player change their team color
5. In that multicast function I just broadcast a delegate, which changes the team color on all other clients```
rotund onyx
#

so I guess the way I was passing information was sort of correct

#

but I dont know how to make an OnRep function, nor do I have any idea what a delegate is

#

also whats the difference between using OnRep and just manually calling the functions off of the function that sets the variable

fading birch
#

Calling the OnRep forces the variable to replicate

#

just changing a replicated variable means it'll replicate per the engine's priority order

rotund onyx
#

whats the difference then between repnotify and just a normal replicated variable?

fading birch
#

RepNotifies allow you to execute functionality on each client it's replicated to after it's replicated.

#

that's the main difference

rotund onyx
#

how do I use that functionality?

#

also isnt the PlayerState invisible to everyone but the owning player's client and the server?

fading birch
#

No. that's the player controller you're thinking of

rotund onyx
#

so everyone can access each other's playerstate?

fading birch
#

no, everyone can receive data from each other's player state

#

sent via the server

#

technically a client can look at everyone's player states as it's available in the player array in the gamestate

weary saffron
fading birch
#

You would need to tell the session to stop advertising.

#

Which doesn't appear to be exposed there.

rotund onyx
#

man I dont know what is blocking my brain but I'm just not understanding what I'm supposed to do

#

I wish it was easier to just update everyone's ui lol

fading birch
# weary saffron I found.

you could set AllowJoinInProgress to false there and then in your find sessions ensure that it's also marked false.

fading birch
rotund onyx
#

honestly just the whole thing

#

I don't really understand how to set up the chain of events if that makes sense

#

what kinds of events, how many, and why certain types are needed

#

and especially how to tell all the clients to update

#

that I have never once gotten even close to working

fading birch
#

ok so, to answer an earlier question, delegates

#

have you ever worked with async type operations?

wicked lodge
#

So I'm trying to figure out the best way to replicate picking up / dropping a weapon, I've got it working using multicasts although I noticed an issue when the 2nd player would be alt-tabbed out or something and you would pickup / drop it then it wouldn't update for the client when he tabs back in, I looked over the demo content and I "think" it has to do with relevancy, so should I use RepNotify as well ontop of the multicast to update or is there better ways?

fading birch
#

I would use a repnotify rather than a multicast

#

multicasts can be missed

#

repnotifies won't be

thin stratus
#

You should only use RepNotify here yeah

fading birch
#

well, with few exceptions

thin stratus
#

State related things should be handled by notifies

rotund onyx
thin stratus
#

I only just stood up. What is your problem and goal atm@rotund onyx ?

fading birch
rotund onyx
fading birch
#

So, if you follow the setup I used, the delegate that's multicasted from the gamestate is bound on each client's UI

thin stratus
rotund onyx
#

sounds simple for a more experienced dev, but man I am having trouble

fading birch
#

which calls a function to loop through each player state and check their team color and change it accordingly

#

In action, this is what it looks like:

rotund onyx
thin stratus
#

Where is the color they picked saved atm?

rotund onyx
#

right now I have it in the PlayerState because I thought that was the correct place for variables I need to share with everyone

fading birch
#

yes

thin stratus
#

That's correct

fading birch
#

that's a good spot to put this particular variable

thin stratus
#

So it's literally a color variable?

fading birch
#

since it relates to the player

#

and needs to be replicated

rotund onyx
#

its a struct that stores stuff like the player name and whatnot, but mainly the color is important in my case

thin stratus
#

Okay. The struct variable has to be set to RepNotify in this case. It communicates the state of something and has to use RepNotify to also properly effect hot joiners and people out of relevancy

rotund onyx
#

ok I have made it a RepNotify

thin stratus
#

RepNotify produces a function for you

rotund onyx
#

and I finally figured out where I can access the function lol

thin stratus
#

That function calls on players when the variable changes/replicates

#

Means every player calls it locally.

rotund onyx
#

so does the function call on every player state when any variable is changed?

thin stratus
#

Where is you UI reference stored?

#

Not any

#

Only the struct

rotund onyx
#

wouldnt it make everyone's struct the same though?

#

I assume not, but thats what my brain wants me to believe

thin stratus
#

No because you have multiple PlayerStates

fading birch
#

it only replicates from that player's playerstate

#

each player state in a level is it's own actor

thin stratus
#

Honestly. We can actually make that simpler

fading birch
#

and each client has a copy of all the player states with them.

rotund onyx
#

so any matching object with a repnotify variable, notifies all other objects of the same type?

thin stratus
#

No only in itself

rotund onyx
#

so how does it get to another client?

thin stratus
#

They have the instance of that playerstate

rotund onyx
#

is the OnRep function server side?

thin stratus
#

No everyone

#

I think you have trouble imagining how class instances work in multiplayer

fading birch
#

the server calls the onrep

rotund onyx
fading birch
#

well sort of

#

the onrep is ran on each owning client

rotund onyx
#

I'm a very visual person

fading birch
#

after a variable is replicated by the server

rotund onyx
#

and this is hard to visualise

fading birch
#

😄

#

boom, slide

rotund onyx
#

ah the magical network replication guide

thin stratus
#

@rotund onyx Okay I'll have to get up and a coffee, then i will try to get that explained

rotund onyx
#

what kind of event do I need to use to set the variable in my playerstate?

#

should it execute on server, multicast, or does it not matter because I have the power of repnotify?

thin stratus
#

Alright so

#

I'll get back to that question later. Let's talk about Multiplayer and Actor Instances for a second

#

Let's focus only on actual Multiplayer where each Player has their own Computer @rotund onyx

#

Now each game runs on each Computer and the Game can only access Data that's in the Memory of that Computer

#

That means, if you see a Character on the Screen, it's part of your Memory.

fading birch
#

😄

thin stratus
#

Now, the rules state that Server has Authority. That means the Server is the one that can make stuff replicate.

rotund onyx
thin stratus
#

That includes the creation of an Actor. If you do this locally on a Client, it would only exist on that Client's Computer. If the Server spawns a replicated Actor, it tells the Clients to also spawn a copy on their Computer and it will communicate between them by keeping track of that memory, combined with a unique ID.

#

So whenever you send a reference of an Actor over the net, it's actually just an ID that is used to find the matching actor on the other machine

#

The same goes for PlayerStates

#

Let's say you have a Server and 2 Clients. Dedicated Server here so it becomes a bit simpler.

#

The Server spawns a PlayerState per Player. It then sends each player a message to spawn a copy of each PlayerState on their Machine.

#

Means the Server has 2 PlayerStates. And each Client will have two PlayerStates

#

One is their own, the other one is from the other player

#

The Struct with your information then also exists twice

#

Once on Client1's PlayerState and once on Client2's PlayerState.

#

When modifying Client1's PlayerState, the second PlayerState stays unchanged

#

And other way round

#

Now applying the rule of Server having authority, if the Server changes a replicated variable in Client1's PlayerState, it would replicate to copy of this PlayerState on each player's machine

#

So Client1 would get the info on their own. And Client2 would get the info in the PlayerState of Client1

rotund onyx
#

man that actually makes a lot of sense

#

so when I set my RepNotify I need to do it via a Server Event somewhere in the line

thin stratus
#

Something something like this

#

Looks a bit different for ListenServers, as they are Server and Client at once

#

And will grow when there are more clients

rotund onyx
#

👏 a diagram!

thin stratus
#

But the most important part is to understand that the PlayerState of Client1 exists on the other Players too, but as a Copy that is connect

#

If you have a non-replicated variable in the playerState, and you change it, it would not change on anyone else

#

So they are indeed their own instance

#

Now let's get back to your color issue

#

Replicated Variables replicate from Server to Clients

#

So changing a variable from 0 to 1 on Client1's PlayerState on the Server will also change it, eventually (ping), on the two instances of that PlayerState on Client1 and Client2

#

If the varaible would not be replicated, it would only change on the Server

#

If a Client changes a replicated or non-replicated variable locally, it will only change on their end

#

Because again, replication only goes from server to clients

#

To prevent cheating for example

#

So your Struct does the same

#

If you change the Color of it on Client1's PlayerState (on the Server), it will replicate to the instances on the Clients

#

RepNotify now means that in addition to replicating, it also calls a function once the data is there

#

Which is super convenient, because people that join later, or come into relevancy range (a playerState is always relevant, but e.g. the Color of a Character that is far away would fall into this category) would still get the variable replicate and the function would call

rotund onyx
#

and that function will probably be to update my UI

thin stratus
#

Yeah, at least if you want to do it as correct as possible

#

There is an easier way, which is using a Binding in your UserWidget

rotund onyx
#

I would rather make good habits

thin stratus
#

That basically polls the variable constantly

#

But it's better to keep things event based

#

Now since the OnRep function calls on everyone locally for Client1's PlayerState Struct

#

You can get your UI by just doing GetPlayerController0

#

, casting that to your own PlayerController class and you have access to your UI

#

At which point you can forward the struct to the UI over each of those functions

#

In the example in the diagram, it would call 3 times. Once for the Server (that's a Blueprint thing), and once on each client

#

But always locally on each of those computers

rotund onyx
#

oh so no wonder its not a big deal to worry about character controller id

thin stratus
#

The ControllerIds are actually not really important in Multiplayer

#

You usually work with "relative" to where you are

#

E.g. you use GetOwner() on the PlayerState to get its specific Controller

#

Or GetController() in the Pawnm/Character

#

Controller is of course only valid on owning Client and Server

#

But imagine you damage a Character on the Server and kill it

#

And the Server is now supposed to respawn the CHaracter

#

And possess it

rotund onyx
#

can I use get controller in the playerstate?

thin stratus
#

It needs the Controller of that Character

#

Using GetPlayerController0 is not relative to that Character

#

So that's bad here

#

It's better to just do GetController() before unpossessing/destroying the charater

thin stratus
#

But remember that this will be invalid for all clients that are not the owning one

#

So Client1 get use it on PlayerState1

#

But not on PlayerState2

#

But you also don't need it for your UI.

#

You don't care who's the Controller of that PlayerState

rotund onyx
#

oh I am just realizing that RepNotify allows me to get around using a For Each loop potentially

thin stratus
#

yes 100%

#

It already calls on everyone locally

rotund onyx
#

ohhhh

thin stratus
#

Every time the function executes you are on a specific client that received the info

#

You can just do GetPlayerController0 to get that local players controller

#

And access your UI

#

So that side of the problem, the receiving the data and updating your UI should now be more or less explained

#

What about the side of setting the variable, do you have that?

rotund onyx
thin stratus
#

Yes

rotund onyx
thin stratus
#

So when you create UI you have that pin you can pass something in on the CreateWidget node

#

When you create UI in your PlayerController, it's good to just pass "Self" into that

#

In the UMG Widget itself you can then do "GetOwningPlayer"

#

Which is the PlayerController

#

It even allows you to do GetOwningPlayerPawn automatically at that point if you ever need it (in case the player has a pawn possessed)

rotund onyx
#

ah I was getting player controller 0 because I figured its only ever local to one client

thin stratus
#

So when the button in your UI is pressed, you can do GetOwningPlayer->PlayerState->Cast To YourPlayerState->ServerRPCSetColor

#

Yeah PlayerController0 is fine

#

Just better habit to always stay relative if needed

#

The reason is: If you ever get into the situation of wanting to make a local coop game, the ID on teh GetPlayerController(..) node is suddenly important

#

Means PlayerController(0) will always be the first local splitscreen player

#

If you use that in a Widget that exists 4 times (for each player), you would always change the first player

#

But if you make sure to pass the PlayerController that creates the UI into the UI and then use that via GetOwningPlayer, you can be sure that you are modifying the correct player

#

If you are 1000% sure that your game won't have local coop/multiplayer, then GetPlayerController0 is fine

#

But you should still be aware of this

rotund onyx
#

ah ok

#

given that my playerstates will repnotify the character controller (and the ui) how can I clear my list of players so it can be refreshed?

#

I am trying to get rid of the for loop, but I'm not sure how to clear the list of players (and colors) first

thin stratus
#

Yeah that's the only problem that you have if you do it like this

#

So theoretically you don't need to if it's just about the color

#

You can loop over your UI entries

#

And find the one where the PlayerState matches

rotund onyx
#

ah but it still loops

thin stratus
#

Assuming you pass that into each entry when creating it

#

Yeah but in your UI

#

So that locally for each for the rows of your UI

#

Not actually per player to notify them

#

You could also just clear the list and recreate it based on the PlayerArray of the GameState

rotund onyx
#

I think thats the easier way

thin stratus
#

So just rerun the logic you already used to create it in the first place

rotund onyx
#

so do I not need a repnotify if I do that

#

since I wouldn't really be using its function

thin stratus
#

You do, for notifying the UI to refresh in the first place

#

Otherwise you don't know when the variable changed :P

rotund onyx
#

I guess I can just get the owner instead of PC0 so that it only happens once

thin stratus
#

The owner of the PlayerState?

#

You should use PC0

#

The owner is not important

rotund onyx
#

but wouldn't it call my loop once for each playerstate then?

thin stratus
#

There is no loop

#

Ah wait

#

There is a loop to recreate the UI

#

But that's totally okay

rotund onyx
#

is there a way to only call that loop once?

thin stratus
rotund onyx
#

i figured getting the owner of the playerstate would work because I only own 1

#

then repnotify only is able to call one successfully

thin stratus
#

But the other players should also update the UI

#

Otherwise only the local one would see the change

rotund onyx
#

oh I was still mistaking it for calling on every playerstate

#

not just the one to update

thin stratus
#

The RepNotify will trigger refreshing the UI on each player if you do it like this

#

What Refresh UI is is up to you

#

Either kill all UI entries and redo them (totally fine)

#

Or have a way to find the one that matches the player and update that

#

One way of finding them would be passing in the PlayerState when creating them

#

Maybe you do that already

#

Then you can pass the PlayerState to your RefreshUI function

#

And compare

#

But you still need to loop either way

#

Unless you keep track of the entries in a TMap

#

But that's just overoptimizing it tbh specially since the direct look up of a TMap with only a handful of entries is more expensive than the loop

#

Just remove all entries and redo them

rotund onyx
#

hey it works!

#

not only does it work, but more importantly I understand why

#

I owe it to my teacher, thanks so much for the help

thin stratus
#

No worries.

#

I will have to leave now though. Gotta walk the doggo and then start working :P

rotund onyx
#

now I can finally sleep lol

thin stratus
#

Cheers, have a good rest

wicked lodge
#

Okay so now I've converted to using RepNotify on my state updates, however if I pickup a weapon outside of another players relevance distance then the weapon stays there and doesn't update until he goes close to the player who picked the weapon up, how do you get around issues like these? Same goes for dropping the weapon

bleak tiger
#

Evening

#

I would like to ask some noob questions

#

I'm looking at webpages talking about EOS and OWS

#

I'm trying to figure out what the overlap is between them

thin stratus
bleak tiger
#

yah and open world server

thin stratus
#

No I mean, ask in that channel

bleak tiger
#

oh, what about open world server?

thin stratus
#

We have no channel about that, but EOS peeps will sit in that channel

bleak tiger
#

aight, ta

thin stratus
#

You don't want it to do anything if they are out of that distance

#

If that distance is too low, then increase it

#

Or override IsNetRelevantFor (c++) and add some custom logic

wicked lodge
#

But when Player 1 picks up the weapon and runs away from Player 2 without being in relevance range of him, then the weapon on Player 2's screen is still in the spot when he runs up to it even though player 1 picked it up, how do I go about that? it works fine otherwise right now

#

Because the weapon isn't actually there it doesn't update when Player 2 gets close to where he sees the weapon

thin stratus
#

The Weapon being on the floor has its own state

#

With its own RepNotify stuff

#

Which should take care of hiding it

#

Or are you literally using the actor that is on the floor when you pick it up?

wicked lodge
#

Yeah, using AttachActorToComponent

thin stratus
#

Ah

#

Hm

#

I mean i wouldn't do that

#

The thing on the floor should be a pickup that knows the weapon class

#

Unless you need to persist some data?

#

Hm

#

I mean, when the weapon gets into relevancy range of the second player, it should attach itself to the Pawn

#

So there shouldn't be an issue

wicked lodge
#

Well that's where I think it gets a bit weird because the player (Server) is the one who decides the repnotify right, so if the server doesn't think the weapon is there it doesn't fire the event

#

even though on player 2s screen it's there

#

If there's no way around it I suppose I could do as you said and just have the actor be more of a spawner that just sits there

thin stratus
#

You can have the OnRep logic in the Weapon too

#

OnRep_Pawn

#

But I think that still causes issues if the pawn is invalid due to being out of relevancy

#

So I would go with the spawner

#

And if you really need to persist data, like ammo, because it was dropped, then I would make sure that the Pickup has that info in addition to the class it should spawn

finite shell
#

Do i need for Dedicated server dedicated IP?

thin stratus
#

Depends

#

If you want people to connect to it via IP, then yes

finite shell
#

Sooo...how can somebody join my without dedicate ip

#

?

bitter oriole
#

Sessions

silent valley
#

If you use an Online Subsystem then a dedicated server creates a session and clients can search for sessions and join them.
Using, for example, Steam.

finite shell
#

Ok thy

#

Thx

#

I dont know where is fault but friend cant join me when i have sessions

silent valley
#

I could be 100 different things. You'll have to dig into it.

finite shell
#

Does someone functional session project than i will chceck it where i do mystake

bitter oriole
#

There's a lot of tutorials and not a lot of actual work to get it running

#

You can try with the default NULL subsystem, locally, and with like 4 Blueprint nodes have your server create a session, the client search for it and join it

#

When that works, move on to Steam

finite shell
#

Ok

silent valley
#

What logic do I need to know if the Actor function I'm running is running on Server, but the actor is owned by a remote player?

#

GetLocalRole() == ROLE_Authority && GetRemoteRole() == ROLE_AutonomousProxy ?

short arrow
silent valley
#

thanks - yeah I think I do need to get the controller 👍

thin stratus
#

IsLocallyControlled on the Controller at hand would also work

wicked lodge
#

So I just got back and the pickup drop system seems to work just fine if I enable Always Relevant when a player picks up the weapon and disable it when I drop the weapon without using a spawner system, but is using always relevant very inefficient?

thin stratus
#

Yes

#

Cause not everyone always cares about everything

green delta
#

forget how to into-multiplayer
check pinned messages
awwww yeah.jpeg
thanks @thin stratus !

twin juniper
#

I wanna do a client /server multiplayer in Unreal, is there any great tutorial or something I should check it out?

green delta
#

literally checked the pinned message

#

eXi made a compendium

primal isle
#

hi, im smashing my head at making my spawning from lobby work as intended and whatever i do just wont cut it

#

the situation right now is that i only spawn the server player

#

i'm guessing im not really using the players controllers of the people that join the lobby right? anyone cold give me a hint on what im doing wrong pls

meager spade
#

that looks really messy and clonky

#

and your using Get Player Controller node which is a big no no in multiplayer games unless you know when to use it.

primal isle
#

i tried to find some tutorials to help me make the team selection and character selection

#

and i couldnt really find anything simple thats on point (without extra crap in them)

#

programming aint really my thing yet im just learning now

#

but yeah it does feel like a big pile of momma's spaghetti

soft shell
#

I have a large animated model ( a giant ) that you can shoot a part of - it walks over the level.. now the animation is out of sync between clients and server (i.e. clients think they are shooting it, but it's not there on the server.. I've visually debugged the position on the server and it's definitely out of sync) - how do I get all clients to see the correct animation (and therefore hit points) - Thanks

fading birch
primal isle
#

i had a look up but failed to find the reference to teams and or character selection

#

im not trying to have anything overcomplicated, just join the lobby, select team and character - go to playable map(or location if the lobby is in the same level) and do the gameplay which will be simple stuff

#

the only reason i have for teams is - spawn on the teams side, bind the chat to the team players, and get the scoreboard to show how many points the teams get while it also shows the players that score

#

and then the characters are just to have different stats like how many tiles they can move or how acurate they are

thin stratus
#

Well it's simple

#

If you know how to :D

#

Team can be a simple uint8

#

Character can be some FName for a DataTable or even the Class for what it's worth

#

In the Lobby you need to populate the UI with the choices for the character

#

And when joining the lobby you already need to figure out the team the player should be into

#

You usually put that info into the PlayerState and PlayerController

#

And when moving maps you can utilize CopyProperties int the PlayerState and OnSwapPlayerControllers in the GameMode to move the data back and forth

primal isle
#

I just deleted that whole noodle i had

#

for now i made an enum blueprint with team a and b and another one for all the characters

thin stratus
#

Functions like "GetDefaultPawnForPlayer" in the gamemode can be used to grab the character class directly from the PlayerController if you moved it properly

#

Sure, an enum also works

#

As long as you can pull the required data from somewhere for the Character

primal isle
#

so i made this custom event in the player controller and added the enum to it

#

and in the widget when the button is click i set that enum to the choice

#

or should i do this in the playerstate?

#

the way i made the lobby is click the team to select the team then click the character to select the character you want to play as, then when the server clicks start they should spawn in the map with the selection

#

but i think my biggest problem is not getting the players controllers right

finite shell
#

My session work in lan but my friend can't see my server

green delta
#

can i get some feedback on this? I'm making rock paper scissors for mobile:
A: loads up VS mode -> they have authority (host)
A waits for an opponent
Player B joins -> the game state checks if both players are there and the match session starts
countdown 10s and each player can choose R P or S on their widgets
Once selected, the info is sent to the player state.
If both players selected or timer <=0, proceed to share the info to both player controllers to update their widgets and then compare and evaluate the results and determine the winner.

errant vapor
#

Using the replication graph, I have a low update frequency actor who failed its property replication to a client due to packet loss and now refuses to retry it unless I force a netupdate... is there any way to ensure property changes become reliable?

vague meadow
#

Does anyone know a proper way of making a dynamic animation system with online multiplayer?

#

I have an int for each player tracking the animation speed (and that's used by the blend space on the animation) but i keep having strange issues for the second client where the first client shows the animation moving properly but the second client sees the first client idling for some seconds when the running animation is playing

#

I have it so every tick the animated clients call a macro inputing in the movement axis and stuff

unknown.png
#

Then that macro does some messy math to change how much every action changes the speed of the animation (for example i want turning to make the player slowly walk), and this calls another function

unknown.png
#

Then the last function just multiplies the value by the speed of the character (affected by sprinting and crouching) and calls an event that runs on both the server and the client and sets the speed of the character

unknown.png
vague meadow
#

Because i basically just threw in stuff until it worked to see if i could actually make something that worked but there are some issues with this that i can't pin-point out

finite shell
grizzled flicker
#

Can anyone plz provide me an alternative to the ugly ass server browser? Is there not a way to automate finding a server and automatically having a player join it on login?

fading birch
#

you can do that, you just plop them into the first session they find.

grizzled flicker
#

How tho?

#

Explain to me like I’m 5

dire cradle
#

Like this

#

just get the first element of the sessions array

grizzled flicker
#

Using dedicated server does it matter?

fading birch
#

nope

dire cradle
#

if it shows up on the session search then no

fading birch
#

find sessions does not care about dedicated or listen servers

#

just what sessions are searchable

hollow oar
#

For beacons, is a OnlineSubsystem necessary? IE what if its just a beacon to some rando's saerver?

summer tide
#

Ai should work in 2 play as client right

fading birch
#

It's not necessary to use an OnlineSubsystem, but you'll have to get the info on where to send the beacon to from somewhere

fading birch
hollow oar
fading birch
#

what are you trying to use beacons for?

rotund onyx
#

Hey very curious. Can I override the function of a Repnotify variable that is contained in the parent class of an object

#

so that the notify does different things in the children of that class

dire cradle
#

You could create a custom event and make the repnotify call that event

#

Then override the event on the child actor

wanton sleet
#

How can I reach other player's controller as a client player ?

dire cradle
#

You can't, only your own player controller exists in the client

wanton sleet
#

How can I achieve to pop up a widget on other client player's viewport from the another client player ?

dire cradle
#

You can use Player State for that kind of logic instead of Player Controller

wanton sleet
#

Okay, thank you. I will check it out.

summer tide
# fading birch yes.

So I have a AI system that works in dedicated server and offline mode but not in 2 clients. All the values appear fine beside it won't MoveTo. Navmesh is there.

fading birch
#

2 clients as in in PIE?

summer tide
#

yes

fading birch
#

and you're connected to a dedicated server?

summer tide
#

2 play as Clients -- no

#

from the editor

#

Other AI sys from the market works

fading birch
#

that should launch a server for you automatically

dire cradle
#

Do your AI actors replicate?

#

and are their "movement replicates" ticked?

fading birch
#

if you've selected Play as Client in PIE, it launches a dedicated server for you.

summer tide
#

double checking

summer tide
summer tide
dire cradle
#

If the move to works correctly on the server it should automatically replicate to the clients

#

Since replicate movement is checked

summer tide
#

yes it is checked

dire cradle
#

Are you sure both clients are connected to a dedicated server?

#

And is "Move To" being called from the server?

#

if the client calls it it won't work

summer tide
#

I'm using MoveTo in Behavior Tree the dfault one

dire cradle
#

Since the AI is spawned on the server the Move To in the Behavior Tree should be running on the server as well

summer tide
dire cradle
#

not sure why it wouldnt work

dire cradle
summer tide
dire cradle
#

Yeah, if they're running client side it won't affect the AI server side

summer tide
#

Is there any option that I could accidentally disabled that can cause that. The same code works integrated with another project.

dire cradle
#

If the AI replicates with movement, Nav Mesh is set correctly, and anything AI related works on server-side it should work

#

Maybe restart the editor and try again? Sometimes it just bugs

rose raft
#

What does CMC do about the unreliable RPCs that get lost? Do the moves never reach the server, which result in a correction, or are they combined into another move sent later?

#

If they are combined into another move, how does that work?

#

I am currently experimenting with my own movement component however in the current state I am sending a reliable RPC with the move every tick, which is of course a no-no.

fading birch
#

I imagine that's what ends up happening

#

the server would end up correcting the player if you had multiple missed RPCs

gilded nest
#

This error keep showing up when I try to open the main menu level. Im running as client since its a multiplayer game, and some reason i cant get the player controller. Any fixes?

unknown.png
rose raft
#

it seems like if the unreliable rpc is lost it will get resubmitted

#

what i dont understand is how it ensures that movement information lost in transit will be resubmitted

#

Essentially (1.) is the problem i'm facing, which makes sense why, but I'm not sure how (2.) works and how I could create something similar for my own movement replication

twin juniper
#

Is worth making mmorpg in ue4?

hollow oar
#

dumb question - After a server travel does the client need to call open level or something? I was upgrading my menu and server from just being a "Open Level" on my server, and it has worked... except the client travels to the server and nothing happens on the client

#

I assumed the client should be loading up whatever map the Server is on

#

Seems like maybe the "MapPackageGuid" param... but I want the client to just auto load into whatever the server is running

thin stratus
#

It will move the clients too

#

They don't need to call open level in that scenario

#

But you need open level to start a listen Server with ?listen

hollow oar
#

i did mean to say clienttravel

thin stratus
hollow oar
#

in this case I am using a dedicated server, and the level i think should already be open...

thin stratus
#

How are you finding the server? Sessions or direct IP?

hollow oar
#

so far directIP in the blueprints - my understanding of sessions is I would have to have a onlinesubsystem to use right?

#

(aka steam or whatnot)

#

i don't mind adding that later, but right now i want it to work across regular old internet

#

(users to be able to host their own dedicated server etc)

thin stratus
#

Yeah

#

Needs ports being open on server side but yeah IP is fine for the start

#

You shouldn't need to do anything extra afaik

#

Try it via console command

hollow oar
#

yup, ports are open and working. Earlier I was using direct OpenLevel and it was working...

#

yeah, if i use "open level" and give ip/port it loads in (have a different bug at the moment of not being able to move, but I will hunt it down... its an artifact of renaming my project X__X)

thin stratus
#

Anything in the server log that says the player joined etc?

hollow oar
#

yeah (you know how to make the console from -log respond to copy paste? X__X)

thin stratus
#

Just mark the line and copy it?

hollow oar
#

might be a windows 7 artifact but it wont lol

thin stratus
#

Right click if in doubt

hollow oar
#

kk moment

#

(my server is windows 7 lol... main dev machine is 10... but it since the copy/paste is being lame its hard to share atm... moment)

#

sorry, no fast clips in windows 7. See second yellow line, its a connect of the beacon BEFORE a "ClientTravel"

unknown.png
thin stratus
#

Screenshot?

#

Ehm

hollow oar
#

note - ips might be odd because i essentially have to run a VPN to get the online connections to work (ipv6 issues, tmobile issues)

thin stratus
#

Lots of beacon stuff in there

#

Can't fully read on phone atm but your aren't hosting with a beacon or?

hollow oar
#

not fully sure what you are asking, but server has a beaconhost, client has a beacon client

#

first thing it does it connect those, that is the secon yellow line

#

once i see that, i hit a button to "ClientTravel" and I see the lines below print out...

thin stratus
#

It looks like only your beacon connects

#

Which wouldn't load any level as it's not for playing together in that sense

#

What are you using the beacons for?

hollow oar
#

interesting...

Eventually, to share information about the possible servers to connect to

thin stratus
#

To so ask things from server upfront?

hollow oar
#

eventually yes, so i am getting them up running now

thin stratus
#

Hm. Not sure if there is a problem atm

hollow oar
#

ping/map/players etc

thin stratus
#

I assume they ran on 2 different ports

hollow oar
#

yes

#

7777 and 7787

thin stratus
#

Are you specifying the correct port when client traveling?

hollow oar
#

not sure, let me check - perhaps that is the issue

#

now that you say it, i am betting not

#

let me fix it

thin stratus
#

I mean you could try to disable the beacon stuff for now and see if that fixes anything. just to nail down where the problem might come from

hollow oar
#

honestly, i think your port comment is ringing true

thin stratus
#

I haven't used beacons in a while and only for parties

hollow oar
#

let me check that out

#

so "Open Level" is a pretty normal way to travel to servers?

#

just trying to get perspective

#

but i kinda thought it was very basic and rough, like just to get something up quickly then build from

thin stratus
#

I guess. I mean most people use sessions but for IP connections it's fine I guess

#

You don't really have an option in blueprints despite the console command

#

Sessions use client travel in the end

hollow oar
#

for my design in mind, I do not want to be RELIANT on steam etc for people to be able to host servers... i want people to be able to host their own stuff

thin stratus
#

Well they can host their own stuff even with steam. Sessions just hold the connection info

hollow oar
#

i wish there was a regular IP "onlinesubsytem" though, so i could code/blueprint all the same way

thin stratus
#

Well null is that

hollow oar
#

null only works local i thought?

thin stratus
#

For sessions yeah

#

IP always works

hollow oar
#

^^ that is the problem. If it worked online too i would've gone that way

#

yup

thin stratus
#

Yeah but how would it hehe

hollow oar
#

XD im just a dumb noob learning

#

(not sure? XD)

thin stratus
#

Sessions need a master server

hollow oar
#

by letting me set up a master server

thin stratus
#

Where they are registered

hollow oar
#

😄

thin stratus
#

And looked up

#

Yeah you can do that of course

hollow oar
#

in the end, i could write my own subsystem

#

but that seems a bit big

thin stratus
#

It is

hollow oar
#

for now

#

glad i am learning then, cause that is what it looked like

#

you rock btw

#

yes it was a port bug lol, imma dummy

#

now to figure out why i don't have my controls... its either related to porting over some blueprint or from the fact that the ClientTravel is happening off the player controller

#

(character and map loaded, they are standing still and can't be controlled. However my game menu button is working and come up if i hit that button...)

thin stratus
#

Input Mode

#

Make sure you have setup for that

#

It needs to be GameOnly when you want to control stuff

hollow oar
#

yeah i am 99% sure its in my character blueprint. It didn't rename well so i had to basically recreate it from scratch... so yeah its probably along those lines

#

(lol all because I wanted to move away from a test name I started my original project with..)

#

if it was the input mode, i think it would correct on me opening and closing my menu, because my menu close button has code to resume normal input mode

#

i think my character likely is somehow not associated with controller 0

thin stratus
#

Yeah but what's the initial value when joining

hollow oar
#

found it. long story short i started with thirdpersonmp project, when i renamed my project I made it from a blank project and imported old stuff. Input mapping settings were not there

#

thanks for the help, im heading to bed shortly i think

vagrant lance
#

Has anyone had issues with finding sessions through Steam? I can connect find using Friends, and I can connect to myself in Standalone by searching for games, but in a cooked build the system gets stuck searching for games

bitter oriole
#

Did you start the packaged game from Steam

errant vapor
#

can i somehow force a property to be replicated reliably? so that it keeps sending it until the client has acknowledged it?

#

it seems to be doing something like that when it comes to the initial spawning of an actor, since that never fails no matter how much packet loss

#

but for normal property replication im seeing the client sometimes end up with perpetually wrong data under high loss scenarios

#

sometimes it appears to get better by increasing the net update frequency, but ive also seen times where it refused to fix the clients data even with a forcenetupdate every frame

short arrow
bitter oriole
#

No, that won't do anything

#

Properties are replicated reliably, as in they'll be updated some day when the network allows it

#

The key is to not have simply too much data to replicate too

#

Force net update every frame will make it worse since you add even more congestion

#

At some point too much is just too much

errant vapor
#

ive made my test scenarios as simple as can be, with just two replicated actors

#

the server is attaching one of the actors to the other

#

then im destroying the parent actor and spawning a new one, attaching the old child to the new parent

#

with no packet loss it works fine of course, but as i turn up the packet loss a bit i start getting intermittent issues when i iterate on this

#

and sometimes it gets stuck unable to attach on the client, no matter how long i let it run

bitter oriole
#

Even when packet loss goes back to zero ?

errant vapor
#

if it goes back to zero a while after the problem initially arose, yes

#

its like the server forgot about it

#

and couldnt be bothered sending that reference anymore

#

increased netfrequency seems to alleviate it, as if it gives it more opportunities to test it, but even when its running the net update every frame it can sometimes permanently fail from what ive seen.. and its not a great solution anyway, since i have some actors that should stay pretty much dormant except for a change every few minutes

#

giving them a permanently high net frequency to make sure those rare updates reach the clients even with packet loss seems quite disingenuous

vagrant lance
bitter oriole
vagrant lance
#

It also works if I test it myself through Standalone (with Find Sessions)

errant vapor
#

thats what i thought as well, yeah... and it seems to work on actual actor spawning; that part is never failing no matter how high the packet loss... it can be delayed for a few seconds, but it always arrives

#

its like that initial bunch is guaranteed to be reliable, but nothing else is

bitter oriole
#

Every update is

#

However, changes like 1 -> 2 -> 3 could become 1 -> 3

#

And 1 -> 2 -> 1 could never be replicated

#

That would be working as intended, and could still cause issues

errant vapor
#

do you know if this is supposed to be true for dormancy as well? eg lets say a property goes from 1 -> 3 on the server and a flush is done, but that packet is lost on the way to the client

#

if no more flushes are done, the client never receives it? or is the reliable part on the packet itself, rather than on the net update of the actor

summer tide
#

If I only want to toggle hidden in game for a SK and SM, do I have to do server and multicast

bitter oriole
#

Rapid changes can be skipped

errant vapor
#

but do you know if that test(if ClientAckedData != ServerData -> Resend Data) is only being done on a Net Tick(eg a flush dormancy/forcenetupdate on a Dormant actor), or is it done entirely outside of that system, maybe on a per-packet basis

void nest
#

Anyone know why a "create session" node doesn't return succeed NOR failed? It doesn't return anything? How is that possible?

#

The create session node is definitely being fired as the exit pin (above succeed and failed) is fired

#

however, the latent succeed or failed never fires

#

not even after 10 minutes

#

Trying to figure out what could cause that

vagrant lance
#

Does anything look wrong with these? I have messages printing text so I'm pretty sure it gets stuck trying to look for sessions (it doesn't fail or succeed). Works fine in Standalone but not in the actual packaged build on Steam. Also this works fine with friend invites.

UE4_FindSessions.PNG
viscid monolith
#

Hi, how would i make between-actors communication, like this:
Player 1 wants to swap characters with Player 2
Player 2 gets this message and creates UI for human
If human selects Accept, They swap characters
Or else nothing changes.

Im not sure how can this communication be made in multiplayer project

fallen oracle
# viscid monolith Hi, how would i make between-actors communication, like this: Player 1 wants to ...

Replicated to server function from player1, a parameter to target player(playerstate?character?)
Server finds out which playercontroller it needs (playerstate's owner is a playercontroller, so thats a good starting point ). Call a Replicated to client function on player 2 controller
player 2 receives rpc, show UI.
if clicked yes, send event to server that he accepted the swap, and server despanws and respawns the character for the player controllers

sacred folio
#

I'm pretty sure someone will be able to help me out with this, how would i setup a BP with overlap or a volume to detect when all connected players are either overlapping or in the volume to allow another action to happen. Which would be the best way to do it.

narrow skiff
#

Is it a Character BP? @sacred folio

sacred folio
# narrow skiff Is it a Character BP? <@!770644611173318737>

So this is the idea, want to have a room on a multiplayer game that when all the connected players are in will allow the door to be closed, then on the door closing in going to trigger a seamless travel to a new level, also already have an array setup for the connected players so that part is already built, the door BP with the interact for close is also already created. so in essence all i need to create it the way to detect if all players are in the room, after that creating the bool on the door to allow the interaction to become live ive got and the seamless travel ive got as well.

narrow skiff
sacred folio
#

the part that sucks is i wish i could do it without tick, not sure a timer would work might though

narrow skiff
#

You could do a function timer even though if they are in the room right before the timer went off they gotta wait again

sacred folio
dark edge
#

Every time some enters or leaves, do the check

sacred folio
#

thanks everyone that helps alot just had to run it all through my head and makes sense now on how to get it to work.

narrow skiff
grizzled stirrup
#

Is the best way to ensure two properties replicate down together to just put them both in a struct and replicate the struct instead?

#

An example: a projectile actor and a tint

#

If the projectile actor replicated before the tint then the tint wouldn't be initialized when the projectile spawns and there could be a delay before the tint gets initialized

#

Leading to popping visuals

thin stratus
#

I would say yes

grizzled stirrup
#

Thanks

severe spear
#

I have pawns controlled by physics, and they seem to be out of sync in 4.24.
They both have StaticMesh components on them and I am using AddForce on it, with replicated MoveRate * MoveSpeed * ActorForwardVector, in Tick.
Physics affected componets are replicated, and Replicate Physics to autonomous proxies is set to true.
I tried opening the same one in 4.27, it seems to be in sync after some TLC. I am not sure if it is the engine version that fixed or, I am missing out on something.

elder sable
#

I have a client-server and i start my game as standalone from the editor, i don't understand why APawn::PossessedBy is called 2 times

elder sable
#

nvm, i have another pawn somewhere, i need to find what it's doing in my scene :p

primal isle
#

where am i suposed to save my team and character variable selected in the lobbymap to have it when i travel to map1?

primal isle
#

also, is an enum enough to store the team selection or do i have to switch on enum and add some new variable int index to each and use that after?

vague spruce
#

does anyone know the command to visualize replication errors?

#

between the client and server?

narrow skiff
#

Print String

#

@vague spruce

vague spruce
#

wat

#

lol

#

it's like t.ShowCorrections or something like that

#

just found it, looks like it's p.netshowcorrections 1

elder sable
#

Do you have naming conventions for rpc functions and server/client only functions ?

vague spruce
elder sable
#

Even for non rpc ?

vague spruce
#

oh, only Server_ prefix with functions tagged as server functions with UFUNCTION

#

i would figure non rpc funcs dont' have to follow that convention

elder sable
#

Ok thanks

lusty fractal
#

I have all players connected to the same session lobby in a waiting map. When the server clicks the ready button, I want all connected clients and the listen server to go to the new level together. How would I accomplish this? (feel free to @ or dm me)

fluid summit
#

Hi! i just finished setting up my dedicated server and i want to start working on the login system/session.

Does anyone know how to handle the player session or have information on how to approach it?
i'm thinking on checking constantly if the session is alive and if not, throw a message of "wait, trying to reconnect". But maybe there's something already for that on UE4.

#

also, any idea on how to handle when the user leaves the game unexpectedly? things like saving progress and etc, does it have to always be saved constantly or can you setup something to save everything before he leaves?

past totem
#

itll execute before destroyed

glass vector
#

when BP nodes get executed in the constructionScript, does it get loaded on net load on client? ie, it gets automatically sent to client on spawn

#

when spawning on server

#

ie, if i set a non replicated variable to 20 in construction script, does it also get set to 20 on client?

#

when originally its value is set at 10 for eg

copper grail
#

hello, can i use the 480 steam app id for multiplayer even when publishing it on itch io like that?. (im not gonna publish the game on steam)

past totem
#

if the actor is spawned on the client