#multiplayer | Unreal Source | Page 446

twin minnow · 2019-03-05T01:20:09.178Z

AGameState* GameState = Cast (GetWorld()->GetGameState);

twin minnow Mar 5, 2019, 1:20 AM

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AGameState* GameState = Cast<AGameState>(GetWorld()->GetGameState);

winged badger Mar 5, 2019, 1:20 AM

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GetGameState should work just fine, as long as you are not doing it ridiculously early (like Tick or BeginPlay of an Actor/Component loaded from package) or from a UObject that doesn't have GetWorld() implemented

twin minnow Mar 5, 2019, 1:20 AM

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im doing this in player controller

winged badger Mar 5, 2019, 1:21 AM

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inside of which function?

twin minnow Mar 5, 2019, 1:21 AM

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a server function

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that gets called in a client function binded to a widget

winged badger Mar 5, 2019, 1:22 AM

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when /where is it called from and c/p the function

twin minnow Mar 5, 2019, 1:22 AM

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i guess since it's binded to a widget it's called every tick in a server function

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and yea ill c/p

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void AFortniteClonePlayerController::ServerGetNumPlayers_Implementation() {
    int Count = 0;
    //FLocalPlayerContext Context(this);
    //UWorld* World = Context.GetWorld();
    AGameState* GameState = Cast<AGameState>(GetWorld()->GetGameState());
    if (GameState) {
        GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, FString("Gamestate is not null"));
        TArray<APlayerState*> States = GameState->PlayerArray;
        for (int i = 0; i < States.Num(); i++) {
            if (States[i]->bIsSpectator == false) {
                Count++;
            }
        }
    }
    else {
        GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, FString("Gamestate is null"));
    }
    PlayerCount = Count;
}```

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int AFortniteClonePlayerController::GetPlayerCount() {
    ServerGetNumPlayers();
    return PlayerCount;
}```

winged badger Mar 5, 2019, 1:24 AM

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so, which part of it is not working exactly?

gusty lily Mar 5, 2019, 1:24 AM

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hi, not sure where to put this. invertmouse console command issue:

when acting as a connected client, console command 'invertmouse' doesnt effect. (acting as a listen server is fine and i'm guessing the issue may effect other commands too). Is this known, and how to work around?

twin minnow Mar 5, 2019, 1:24 AM

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the screen message in the else statement is being executed

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which leads me to believe that GameState is null

winged badger Mar 5, 2019, 1:25 AM

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well, world is not null, or you would had crashed

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not quite sure what you're trying to achieve here

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but PlayerControllers will be replicated before the GameState

twin minnow Mar 5, 2019, 1:26 AM

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oh

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perhaps this is not a good place to do this then

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im trying to make a function for my ui widget to bind to that returns number of players and spectators left in the game

winged badger Mar 5, 2019, 1:27 AM

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how does that thing return playercount exactly?

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since server RPC won't change anything on the client, except via replication

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in which case the replication won't happen before your synchronous return

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so by the time you return, your PlayerCount will be whatever it was when you called the function

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@gusty lily is this PIE?

twin minnow Mar 5, 2019, 1:30 AM

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hmmm

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maybe i should just do this in blueprints

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in the binded function itself

gusty lily Mar 5, 2019, 1:30 AM

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@winged badger pie and in packaged game.

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thx

winged badger Mar 5, 2019, 1:30 AM

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invert mouse sounds like something that should be executed per local player

rotund sapphire Mar 5, 2019, 1:31 AM

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playerstate is always relevant you should be able to access them on a client without sending server queries .. i suppose

winged badger Mar 5, 2019, 1:31 AM

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not from first tick of a PC you can't, not reliably anyways

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@twin minnow just have your PostLogin and Logout keep the variable in GS up to date, and replicate that variable

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then bind the widget to it

twin minnow Mar 5, 2019, 1:33 AM

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ok

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i was also thinking of making a custom gamestate class

winged badger Mar 5, 2019, 1:33 AM

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and fully expect it to be incorrect if you init the widget from a PC at the very start

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you'd have to if you want to have a custom replicated variable in it

gusty lily Mar 5, 2019, 1:33 AM

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@winged badger the client player is typing into console.

winged badger Mar 5, 2019, 1:34 AM

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splitscreen?

gusty lily Mar 5, 2019, 1:34 AM

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nope

winged badger Mar 5, 2019, 1:34 AM

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that is odd, have you checked the source for what it does?

gusty lily Mar 5, 2019, 1:35 AM

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no, that is beyond me. but it seems to just invert the axis input

winged badger Mar 5, 2019, 1:35 AM

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void UCheatManager::InvertMouse()
{
    UPlayerInput* PlayerInput = GetOuterAPlayerController()->PlayerInput;
    if (PlayerInput)
    {
        PlayerInput->InvertAxisKey(EKeys::MouseY);
    }
}

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that class doesn't get into packaged builds tho

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you should run the contents of that function "manually"

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    /** List of Axis Mappings that have been inverted */
    UPROPERTY(config)
    TArray<FName> InvertedAxis;

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this implies it gets saved into a config file

gusty lily Mar 5, 2019, 1:39 AM

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thanks @winged badger. i will hook it up to the axis input in character and build a checkbox. appreciated.

dark edge Mar 5, 2019, 3:45 AM

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Got a question for you folks about making sure state is synced up in my multiplayer vehicle building game. I'll just spell out the way I think things should go, and if you think I'm doing it wrong just holler.

Player builds their vehicle in the garage area. They are connected to the server (this area just exists under the map) but the vehicle is client-side only so everyone sees an empty garage where they are building their own vehicle. Think the KSP rocket hangar.
Player wants to spawn their vehicle for gameplay. They send a request to the server, with the vehicle recipe struct as payload.
Assuming everything is ok, the server spawns the chassis(the actual pawn), and starts spawning all the attached part actors. The list of parts is on the vehicle at spawn, and the attached parts are registered in a bunch of replicated reference arrays. Nothing is simulating physics yet. Chassis and all parts are replicated.

This is the part I'm not sure of. I want clients to be authoritative over the physics of their WHEELS, but the server to be authoritative over everything else. Therefore, I need to set the constrained components and enable physics on the server and client separately.

Vehicle Begin Play has to check that everything has replicated out before we can enable physics and finish setup. I'm thinking the way to do it is to periodically check that the Array_Parts length = NumParts from the recipe, and if true, check that all the Array_Parts come back as valid. That should assure that all the parts have replicated over.
Attach wheels client and server side, enable physics, play the game.

This sound like the right approach?

grand kestrel Mar 5, 2019, 4:45 AM

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@dark edge you'll have better luck in #legacy-physics

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You won't get server authoritative physically simulated vehicles without input delay correlating to latency

dark edge Mar 5, 2019, 4:55 AM

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That's fine, it's a slower paced vehicle game

trim oriole Mar 5, 2019, 5:33 AM

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i got started on a project a year ago now just your basic FPS shooter and i got to the point where i want to test on a server it works lan great but my team cant get on it from outside my network and i run servers for games like minecraft but this has me lost i dont even know where to start i have no server functions but replicating my networking skills are vary low and we dont have a tec for that and i mean i have no login map is event begin play open ip thats it for join nothing els not sure how to get player infos or get them online right server has so little to go from and im jsut lost how do i make is so client can find my server then connect with out errors i mean i want vary basic online added nothing crazy just the start and i mean literly how i start stop end add and get when turning searches give ids names and pass is even more then i need just the basic system without steam just looking to get it on open and live tested i can get from the with what i can find here and there but im stuck here cant move forward at all at this point and any help with server side of things and handling and tips help screen shots iv never seen a full working online anything but a minecraft server just want server / client 1 server open map small can stand with a friend nothing more is needed right now trying to get this down so i know it the rest of the stuff is just reading and any C++ or blueprients would be greatly apricated

thin stratus Mar 5, 2019, 7:38 AM

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@trim oriole Yo, please don't write wall of texts like this. That's very difficult and annoying to read

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Also you don't seem to do much research on this as there is more than enough documentation about this process.

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For Listen and Dedicated Servers, you either use a Subsystem and create, list and join session via the Session Nodes. Or you join directly via IP. That's the only ways available for online connections. Since you don't want steam you can only connect directly via IP. And that requires you to open up the 7777 Port the server is listening on.

shut surge Mar 5, 2019, 10:51 AM

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haha 😄 imagine if he talks like this

real yacht Mar 5, 2019, 11:27 AM

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is there any correct way to remove player from dedicated server? Or just i can do OpenLevel and move player to my main menu?/

chrome bay Mar 5, 2019, 12:35 PM

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Kick them?

twin vault Mar 5, 2019, 12:38 PM

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humm

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thinking in ways to create a matchmaking system

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just send my IP/Region over rest to the server, and keep a list of IP/Region and try to match those of same region

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looks like all there is to it?

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i guess i will try that out with a cloud server

keen thorn Mar 5, 2019, 2:26 PM

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hi all, can someone explain why my replicated variable "testfloat" only replicates to 1 client when running dedicated server? Im using the following BP

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testfloat replication

📎 unknown.png

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i want the testfloat to be replicated to all clients, is there a way to mark the variable dirty even when it has not changed?

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i think this is because the var was replicated too fast and then got overidden

twin juniper Mar 5, 2019, 2:28 PM

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Good afternoon all, wonder if someone could help me.... i am having a bad time with some MP stuff.... i purchased the Multiplayer Racing Framework from the store after so many failed attempts at making my own.... but i am having the same problems with the this framework... The problem i am having is when hosting a server be it direct join... or on steam the client car "jitters" its like it has square wheels on but on the host side everything is smooth! now i have tried the packaged one from the framework and everything is smooth... so i built the basic car demo from ue4 and just used console commands to join a server and the same is happening on this. is there something i am missing on settings in UE4?

keen thorn Mar 5, 2019, 2:29 PM

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@twin juniper the jitter happens usually due to the client and server is out of sync and trying to correct

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it could be due to lag, packet loss etc... did you try to pakacge ur project to a standalone game and test?

twin juniper Mar 5, 2019, 2:31 PM

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yea... when i got the asset from the store... the first thing i done was i built it/packaged it 64bit and sent it to the other dev... we tested it and it jitters

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no matter what we do... anything we package jitters

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so it must be a setting in UE4 we are missing?

chrome bay Mar 5, 2019, 2:36 PM

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Welcome to physx in multiplayer

keen thorn Mar 5, 2019, 2:36 PM

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which project is this

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try disable physx in GPU and try again?

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in case

chrome bay Mar 5, 2019, 2:37 PM

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It's nothing to do with GPU physics

bitter oriole Mar 5, 2019, 2:37 PM

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UE4 doesn't do GPU physics

chrome bay Mar 5, 2019, 2:38 PM

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For character movement to be smooth in a real network situation, it has to do prediction and replay - those things cannot be done with Physics objects.

keen thorn Mar 5, 2019, 2:38 PM

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it can

chrome bay Mar 5, 2019, 2:38 PM

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At least, not without considerable workarounds and game-specific implementations

thin stratus Mar 5, 2019, 2:39 PM

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Isn't the person saying that the packaged framework isn't jittering?

chrome bay Mar 5, 2019, 2:39 PM

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I'm going to create a thread for this at some point and just link it... this question comes up all the time

twin juniper Mar 5, 2019, 2:39 PM

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the packaged version i downloaded from the store is not

chrome bay Mar 5, 2019, 2:39 PM

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Well in PIE you won't get the jitter unless you use the packet loss settings

bitter oriole Mar 5, 2019, 2:39 PM

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@keen thorn Got any source on how to set up PhysX with GPU physics in UE4 ?

twin juniper Mar 5, 2019, 2:39 PM

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but the project after i package it is

keen thorn Mar 5, 2019, 2:40 PM

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physics already works in UE4 to some extent, heres a good post on the idea: https://gafferongames.com/post/networked_physics_in_virtual_reality/

chrome bay Mar 5, 2019, 2:40 PM

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not in multiplayer it doesn't

twin juniper Mar 5, 2019, 2:40 PM

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can i post a link to the store here to show you what one i am talking about?

chrome bay Mar 5, 2019, 2:40 PM

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If you want player-controlled physX-driven objects, you are going to suffer a world of pain

rotund sapphire Mar 5, 2019, 2:41 PM

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i also find https://jagt.github.io/clumsy/ is a handy tool for easily simulate latency for PIE tests

chrome bay Mar 5, 2019, 2:41 PM

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Yeah clumsy is great

bitter oriole Mar 5, 2019, 2:41 PM

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PhysX (for physics, not collisions) is simply not compatible with multiplayer

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It's not deterministic so it can't really work

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I usually recommend the UE4 multiplayer course on Udemy that walks you through prediction/replay

rotund sapphire Mar 5, 2019, 2:42 PM

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is there any marketplace asset currently in the store that claims to have networked physics and actually does work nicely?

bitter oriole Mar 5, 2019, 2:42 PM

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Best $10 you can spend

chrome bay Mar 5, 2019, 2:42 PM

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@rotund sapphire no

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it's an unsolvable problem for the most part. Blueman's plugin claims to do it, but I've got it and it's pretty specific in what it does.

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It's also horrendously unscalable

bitter oriole Mar 5, 2019, 2:43 PM

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It's solvable if you allow every client to have a vastly different simulation than other players, I guess

chrome bay Mar 5, 2019, 2:43 PM

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Yeah, or let clients have authority. Even then you're gonna have wierdness

twin juniper Mar 5, 2019, 2:44 PM

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well this is meant to work.. out of the box..... his packaged demo does with no jitter.... but when i package it it jitters.... https://www.unrealengine.com/marketplace/en-US/multiplayer-racing-framework i have to go get kids from school but the other dev is reading this discord @dark hazel he can also answer....

bitter oriole Mar 5, 2019, 2:44 PM

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I've moved forward with custom physics, and the physics sucks a lot but it's stable at least

rotund sapphire Mar 5, 2019, 2:45 PM

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TADS, i think TheJamsh is right client authority is the relatively easy way to get your game working - for now. if you want server authority a little bit of cpp development is ahead - and it wont be accurate but at least you can get something working on the line

chrome bay Mar 5, 2019, 2:45 PM

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When something on marketplace says it works out of the box, take it with a pinch of salt 😄

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Enable physics sub-stepping too, otherwise physics will be limited to the dedicated server tickrate (20 by default I believe)

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Coupled with lag, that doesn't help

rotund sapphire Mar 5, 2019, 2:46 PM

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TADS, the asset is wokring with zero latency, but that is not designed for real actual gameplay - unless you change the physics replication ini settings and get a totally desync with ocassional rubber banding and all sorts of weirdness

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its also doable but i dont think thats what you really want there

chrome bay Mar 5, 2019, 2:46 PM

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It's also important to point out, that PhysX Replication that the engine does is for smoothing only

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It doesn't solve the problem of input lag

rotund sapphire Mar 5, 2019, 2:46 PM

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yes it is zero latency only by design

chrome bay Mar 5, 2019, 2:46 PM

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yep

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PhysX prediction is hard as f. Usually involves duplicating physics scenes etc, and usually does very game-specific things.

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Rocket League for example, constantly replays the physics scene each frame - but they can do that because they have 9 physics objects max at any one time

rotund sapphire Mar 5, 2019, 2:48 PM

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btw, https://www.youtube.com/watch?v=iWfz0egnch0 ive done some relatively low cost approach for fixing the engine's built in physx replication, but its far from accurate

YouTube

sch5

UE4 Physx Server Auth + Client History Error Correction

This model is using a locally gathered client history of physics simulation, but the server remains to be the authorative party for the final reconstruction ...

▶ Play video

fluid flower Mar 5, 2019, 2:48 PM

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clumsy looks like a useful tool! good find, I've been using the built-in stuff for a while, which is fine for basic tests

rotund sapphire Mar 5, 2019, 2:49 PM

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tho i belive it is accurante enough to get shot by a sniper from a distance and things like that - still its not the right way to have properly synced physx and stuff like that

chrome bay Mar 5, 2019, 2:50 PM

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I'm investigating the immediate physics mode for something like that. UE4 has an implementation of it for character Rigid Bodies.. I'm hoping I can leverage it for prediction/replay too.

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Still involves lot's of duplication though 😦

fluid flower Mar 5, 2019, 2:51 PM

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I opted for client-side only, saved me some trouble, I have a server-authority version as well, but it doesn't play as smooth 😦

chrome bay Mar 5, 2019, 2:51 PM

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Got a Q about it on the Nvidia github atm: https://github.com/NVIDIAGameWorks/PhysX/issues/77

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Nvidia has chipped in

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If I ever crack it, I'll post codesies 😄

twin juniper Mar 5, 2019, 2:58 PM

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Thank you all for your comments... I am on my phone now as I am out... The thing I can not understand is on the store page he also has a link to download a test version before you buy... Its a packaged one... Tottaly smooth for both client and host. But its not when you build it yourself. We have emailed the dev and he can not get what we are... His is always smooth. Of course unless he is lieing but you would hope not.

chrome bay Mar 5, 2019, 2:59 PM

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The thing to bear in mind is that on LAN and with comparable framerates between server and clients, it would always be smooth. But once you introduce any latency and real-world(TM) conditions into the mix, it falls apart.

rotund sapphire Mar 5, 2019, 3:03 PM

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TADS, he probably have been tinkering with the physics replication ini settings (which i just mentioned earlier) but then his workaround will be desync and ocassional teleporting will occure

twin juniper Mar 5, 2019, 3:07 PM

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@chrome bay it jitters on lan too haha. I will look on to everything you have said here as soon as I get back home. Thank you for your info.

void orbit Mar 5, 2019, 3:16 PM

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@bitter oriole are you referring to Tom Looman's or is there another?

bitter oriole Mar 5, 2019, 3:16 PM

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Let me check

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https://www.udemy.com/unrealmultiplayer/

Udemy

Super Simple Online Game Development: Unreal Engine and C++

Use Epic's Unreal Engine for online game development in C++. Covers LAN, VPN, Steam, and more.

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That one.

chrome bay Mar 5, 2019, 3:25 PM

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Multiplayer Helium Rain when :D?

bitter oriole Mar 5, 2019, 3:30 PM

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Absolutely never, would be a nightmare

chrome bay Mar 5, 2019, 3:31 PM

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Haha

bitter oriole Mar 5, 2019, 3:32 PM

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Working on something very different, that I'm still not sure will lead to anything

chrome bay Mar 5, 2019, 3:32 PM

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ah my life story for game dev...

bitter oriole Mar 5, 2019, 3:33 PM

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I'm trying to do something new and a bit original, so the basic problem is getting to something actually fun

chrome bay Mar 5, 2019, 3:33 PM

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Also my life story for game dev 😄

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implement something technically sound.. but is it actually fun? usually not...

trim oriole Mar 5, 2019, 4:39 PM

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@thin stratus sorry about the long message i am trying to get the player just by ip connect but it kicks on join not sure how to handle the players join i just cant get it working its probably bad port forwarding on my part ill they join and then get kicked to the black load up map and when joined last for a minuet then kicks that player invalid info this is where i'm stuck.

twin minnow Mar 5, 2019, 4:52 PM

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@winged badger the issue regarding the counts had to do with when i was setting bisspectator to true/fase

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false*

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for some reason when i set bisspectator before possessing an instance of my spectator pawn, the playerstate's bisspectator goes back to true

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which makes sense i suppose

trim oriole Mar 5, 2019, 5:06 PM

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@bitter oriole what a great resource just what i was looking for when asking for links and help thank you for posting this. not does it work i got tom loomens there to is there any other on this topic tested and working?

twilit swift Mar 5, 2019, 6:22 PM

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Hey Guys, How can I make sure a CPP function only gets called on client? Here's what I'm currently trying. Does this make sense?

    void ReturnToMatch();```

```void UMyGame_GameInstance::ReturnToMatch_Implementation()
{
    //Do stuff
}```

chrome bay Mar 5, 2019, 6:24 PM

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That function is marked with 'Client' so the _Implementation() will only ever be processed on a network client - unless of course you call ReturnToMatch_Implementation(0 manually.

twilit swift Mar 5, 2019, 6:26 PM

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So, because I'm dumb... If I call this function as the host in a networked game, this function will NOT replicate to the other clients.

chrome bay Mar 5, 2019, 6:26 PM

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It will not

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Only the client that is the 'NetOwner' of that object

twilit swift Mar 5, 2019, 6:27 PM

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Ok, thanks @chrome bay

jolly siren Mar 5, 2019, 6:41 PM

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Does anyone know what the precision is for replicated floats?

chrome bay Mar 5, 2019, 6:41 PM

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32 bits, so full

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no quantizing by default for just a standard rep'd float

jolly siren Mar 5, 2019, 6:42 PM

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okay, that is what I thought. Having issues where my replicated pitch/yaw floats aren't 1:1. Just wanted to make sure I can expect full precision over replication for them. Must be something else throwing them off.

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Thanks James

chrome bay Mar 5, 2019, 6:44 PM

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np's!

unkempt lodge Mar 5, 2019, 7:24 PM

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Hello, i'm making a multiplayer game and i have a problem on the movement, my character is moving like he was shaking 🤔

PS: sorry for my english 😅 + could you @ me pls if you think you have a solution

twin minnow Mar 5, 2019, 7:55 PM

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ive had a similar issue

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when your character is shaking is this only happening when you sprint?

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@unkempt lodge

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because i have this issue when i was changing my movement's maxwalkspeed without replicating this change. however, now i just change the value added into addmovementinput based on whatever state my character's in (walking, running, etc.)

unkempt lodge Mar 5, 2019, 8:11 PM

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Yeah it is when i'm sprinting

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So i'm going to check that thank you

brave moon Mar 5, 2019, 8:32 PM

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How to replicate hip position of ragdoll? This is the whole setup, it's empty project with this ragdoll blueprint in ThirdPersonBP.

📎 270371-324.png

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This is how it currently looks(client see wrong position).

📎 270372-1234.png

winged badger Mar 5, 2019, 9:06 PM

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force the actor position update before the ragdoll executes on client

hoary spear Mar 5, 2019, 9:29 PM

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In this context tho, does it really matter?

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The player (client) will never have something to compare it to during normal gameplay, will he ?

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So its not like the player will go "eeeyy, your dead right foot is wrong!"

brave moon Mar 5, 2019, 10:40 PM

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It matters... for more reasons 1)there's a grab system where you can grab ragdoll do stuff with it.... ragdoll offset from server side can be 10m meters so while you trying to grab ragdoll you see on client it can be anywhere 2) when ragdoll goes back to animation it looks weird bcs its going on server ragdoll location and it will cross like 5-10m while getting up.

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And i dont want to replicate all bones locations and rotations, just position of one bone(pelvis) so it follows where the capsule is.

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Also when i put switch has authority node before set world location, capsule position on both server and client is correct but mesh still offsets(while still follows capsule) from capsule

📎 123234.png

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https://uploadfiles.io/vqgp4 here is link of the project (50MB rar, 4.18 but version doesn't really matter) if someone wants to try to solve it

Uploadfiles.io @UploadFilesFree

Download RagdollReptest.rar for free @UploadFilesFree

tribal solstice Mar 5, 2019, 11:01 PM

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Is it possible to have different chat rooms on a server that display only players in that room?

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I want a large number of people to be joined on a server, but I want them to be able to join chat rooms within that server and only see and talk to the players in that room. I'd like to do it without having to switch levels for each chat room if possible. In UMG.

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I'm thinking there is the main server, which everyone is logged into. Then you can select a chat room, which opens a UI on the PlayerController and tags the PC depending on which chat room they selected. Then, that room only displays a list of the people with that tag.

tribal solstice Mar 6, 2019, 1:24 AM

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Is this a case where it might make more sense to have the widget created on the server so it's persistent?

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and then PlayerControllers can add the existing widget from server into their viewport to 'join' the chat room

tribal solstice Mar 6, 2019, 1:43 AM

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For example at session start, a bunch of chatroom widgets are created and assigned as variables. Then when a PlayerController join the server and selects a certain chatroom from a list, it adds the corresponding widget to their viewport and updates the player list but only for those players that selected that specific widget variable

runic cairn Mar 6, 2019, 4:45 AM

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Where do you guys call the GameMode's ModifyDamage() within GAS? I was thinking in PreGameplayEffectExecute?

opaque oriole Mar 6, 2019, 8:49 AM

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Hey, I want to play sounds only on clients, to be heard only by the player that's calling the functions which are connected to playsound(), actor that plays the sound is replicated. Currently I'm able to either play sound on all clients, replicating the server/client events, or play on the server only (since the actor calling the sounds is owned by server)

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any advise on how to approach this case to play and hear sounds only per each client individually

thin stratus Mar 6, 2019, 9:07 AM

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@tribal solstice 1. UE4 is not build for a lot of users. It might allow you to have 100 users more easily than Fortnite, because you are using a textbased thingy iirc, but despite that UE4 is more build towards having one MATCH per Server.
You can also not load more than one level per Server. One Server, one World, one Map.

The way you describe the Widgets being created upfront is totally wrong. You can't just request Widgets from the Server etc.
Widgets are purely meant for Clients (and ListenServer Client) and aren't even replicated. If you want different "Channels" then you have to move the PlayerStates or PlayerControllers into different arrays and call RPCs only on the Member of these arrays.

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You could make a Struct with a PlayerState Array in it, and maybe some other information about a chat room

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Then make a TMap in the GameState with String as Key and the Struct as Value. A new Room would be a new entry then (e.g. "Room01": Struct).

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You would then also save on the PlayerState or PlayerController of each user in what Room they are (just a String variable) so if someone issues a "Send Message" RPC, you can check what Room they are in, pull the Struct out of the map and send a ClientRPC to all States/Controllers in the Array that sits in the struct.

tribal solstice Mar 6, 2019, 9:32 AM

#

eXi, thank you once again. I've been messing around all today and came up with something sort of similar to your suggestion., but yours sounds a lot more efficient.

#

About the many players - is it not possible to have many more than 100 players in your game if it's hosted on a dedicated server with sufficient bandwidth?

thin stratus Mar 6, 2019, 10:04 AM

#

Really depends on the game

#

Fortnite makes heavy use of the new ReplicationGraph system

#

Which is def nothing for a beginner

#

UE4 was originally build for games like Unreal Tournament

#

So most 32 Players games work quite well.

#

But keep in mind this is also based on a 3D game

#

If you only have UI, you can technically disable all rendering

bitter oriole Mar 6, 2019, 10:09 AM

#

100 players is nothing to laugh at for a 3D game

tribal solstice Mar 6, 2019, 10:13 AM

#

For a 3D game I am aware that 100 is very solid, but my game is mostly text and UI. Appreciate the help once again, eXi.

#

@thin stratus Would you mind expanding on what you mean by 'Then make a TMap in the GameState with String as Key and the Struct as Value. A new Room would be a new entry then (e.g. "Room01": Struct).'

thin stratus Mar 6, 2019, 10:16 AM

#

TMap or just Map in BPs is a type of variable

#

Similar to an Array

#

Only that it's not indexed by an integer but by a key that you can choose the type off

#

E:g. a String

#

So it basically maps a Key to a Value

#

I can't really expand on this more :P

tribal solstice Mar 6, 2019, 10:21 AM

#

I got it! Thanks!

real yacht Mar 6, 2019, 12:08 PM

#

when i call RestartGame in gameMode

#

is it GameState also restarted (variables to initial value)

#

or i need manually to set myInt = 0.

#

?

#

Thanks

thin stratus Mar 6, 2019, 12:58 PM

#

RestartGame needs you to override the Restart function in each actor that you want to reset

#

And then manually reset the variables that you want to have default again

real yacht Mar 6, 2019, 1:07 PM

#

so you want to tell me, that if i call restartGame in GameMode, current gameState won't be set to default value?

meager spade Mar 6, 2019, 1:12 PM

#

thats true

real yacht Mar 6, 2019, 1:14 PM

#

okay, thanks

hollow pond Mar 6, 2019, 1:14 PM

#

Guys, I'm having a big trouble getting a bund on a multicast dynamic delegate to fire up in a Listen Server using CPP.
I'm firing it up from my GameState and I bind to it via Blueprints on all clients (UMG blueprints), but only the clients get the notification, the listen server never gets the Broadcast event, could someone point me out what the heck is going on? It works on dedicated servers and although I'm using a Server function to change a variable inside the game state, using "ReplicateUsing" to fire up RepNotify functions, I am calling them on the server manually but the listen server never gets the Bind to fire up

winter plover Mar 6, 2019, 1:41 PM

#

do you have some code?

hollow pond Mar 6, 2019, 1:41 PM

#

Yeah, it's not anything complicated

winter plover Mar 6, 2019, 1:41 PM

#

sometimes the devil is in the details

hollow pond Mar 6, 2019, 1:44 PM

#

https://pastebin.com/NEJQD0MU

Pastebin

[C++] .h public: DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(...

#

really that simple

#

just got the parts that are part of the problem

#

that's a gamestate class

#

and I just bind to that delegate on UMGs from client and listen server

#

but only the ones in clients that aren't the listen server fire up

#

I may be getting the architecture wrong on where the game state sits in the framework

winter plover Mar 6, 2019, 1:45 PM

#

the gamestate exists on all participants

#

altho

#

I dont think it's owned by the clients

#

you are doing a client->server RPC

hollow pond Mar 6, 2019, 1:46 PM

#

No

winter plover Mar 6, 2019, 1:46 PM

#

those have to originate from an actor that is owned by them

hollow pond Mar 6, 2019, 1:46 PM

#

I'm doing a Game Mode -> Game State RPC

winter plover Mar 6, 2019, 1:46 PM

#

    void SERVER_SetFoodInStorage(int32 Amount);```

hollow pond Mar 6, 2019, 1:46 PM

#

yeah, but I'm calling that from the game mode

winter plover Mar 6, 2019, 1:46 PM

#

this is an RPC that is targeted to be run on the server

#

typically from a client when they request something

hollow pond Mar 6, 2019, 1:47 PM

#

yeah

winter plover Mar 6, 2019, 1:47 PM

#

so what you are saying it still gets called from the server?

hollow pond Mar 6, 2019, 1:47 PM

#

it is called

#

the delegates fires up

#

and all clients bound to it on the UMG get the Broadcast event

#

EXCEPT for the listen-server one

#

if I run that on dedicated server, everything works as expected

#

but it's like the client-side of the listen server (which does the bound, I verified that) never gets the broadcast signal

winter plover Mar 6, 2019, 1:48 PM

#

OnRep_FoodInStorage();

#

did you forget to paste that one?

#

im not seeing it in the cpp

hollow pond Mar 6, 2019, 1:49 PM

#

let me check

#

yeah

#

{
    Resources_OnChange.Broadcast(2);
}```

#

just broadcasts the change

winter plover Mar 6, 2019, 1:49 PM

#

put it in six of ` those

#

3 on each side

#

there we go

hollow pond Mar 6, 2019, 1:50 PM

#

😛

winter plover Mar 6, 2019, 1:51 PM

#

can ya show me where you bind the delegate?

hollow pond Mar 6, 2019, 1:51 PM

#

it's on UMG, onConsctruct

winter plover Mar 6, 2019, 1:51 PM

#

oh

#

like you update the widgets with the new info

#

right?

hollow pond Mar 6, 2019, 1:52 PM

#

https://gyazo.com/6bd488847933ee978d2b539732ba2f31

Gyazo

#

yeah, exactly

#

I fetch the new data from the game state

#

and update it

winter plover Mar 6, 2019, 1:53 PM

#

also guessing that the int32 param is a type instead of an amount

#

like an index for the resource

hollow pond Mar 6, 2019, 1:53 PM

#

yeah

winter plover Mar 6, 2019, 1:53 PM

#

kk

hollow pond Mar 6, 2019, 1:53 PM

#

exactly, just like an ID,

#

just to avoid creating one for everysingle type of resource I'm creating

#

Like, the Idea I had in mind was to get the UMG notifications on gamestate changes from those values, so I'd use a deelgate to know when that changes on my UMGs.

#

for that to happen, the Game mode changes the Game state values and on those changes, I'd fire up a notify event for everyone bound to it

winter plover Mar 6, 2019, 1:55 PM

#

yea that should work in theory

#

not entirely sure why it isnt

hollow pond Mar 6, 2019, 1:55 PM

#

It has to be something about the duality of the listen servers

#

about it not being a client, per say

winter plover Mar 6, 2019, 1:55 PM

#

I would start like

#

checking each piece of the chain

#

like first find out if your onRep gets called

hollow pond Mar 6, 2019, 1:56 PM

#

I've done that already, everything truly works

winter plover Mar 6, 2019, 1:56 PM

#

then whether or not your delegate is bound

hollow pond Mar 6, 2019, 1:56 PM

#

all the rep functions fire

#

the delegate fires

#

but the listen server just doesn't get the signal on the broadcast

winter plover Mar 6, 2019, 1:56 PM

#

then I would guess the UMG binding is causing difficulty

#

if the delegate itself fires

hollow pond Mar 6, 2019, 1:57 PM

#

all clients update, except the listen server, and dedicated servers work like a charm

#

I'm probably thinking I need a different code logic explicitly for listen-servers

#

to get that delegate setup to work

#

but couldn't find anything related to that precisely, yet

winter plover Mar 6, 2019, 1:58 PM

#

I dont think you really should need to

hollow pond Mar 6, 2019, 1:58 PM

#

I know that ReplicateUsing on Servers have different behaviours

#

and you need to do stuff manually

winter plover Mar 6, 2019, 1:58 PM

#

ReplicateUsing doesnt really fire on servers

hollow pond Mar 6, 2019, 1:58 PM

#

exactly

winter plover Mar 6, 2019, 1:58 PM

#

because they dont replicate to themselves

hollow pond Mar 6, 2019, 1:59 PM

#

you need to call them by hand, but I do.

winter plover Mar 6, 2019, 1:59 PM

#

yea

hollow pond Mar 6, 2019, 1:59 PM

#

I've even fired the broadcast directly into the server function to test it out

#

but the client part never gets the event

winter plover Mar 6, 2019, 1:59 PM

#

you said the delegate still fires

#

like did you try other binds?

#

that are not UMG?

hollow pond Mar 6, 2019, 2:01 PM

#

no

#

just the UMG one

#

I could try adding some dynamics to it on a player controller

#

and try to see if I can nail it down

winter plover Mar 6, 2019, 2:02 PM

#

try a couple of others, just so we know for sure whether or not it's UMG causing the issue or delegates in general

#

oh also, this might not matter at all but

#

I tend to leave delegate class declarations in the global space

#

as opposed to inside the class

#

dunno if that might cause issues

hollow pond Mar 6, 2019, 2:03 PM

#

hmm

#

I could try putting it on a global scope

#

maybe, who knows

winter plover Mar 6, 2019, 2:04 PM

#

I didnt even know you could put em inside classes

#

tbh

hollow pond Mar 6, 2019, 2:04 PM

#

I actually was a bit confused about that and just wrote it down in the class and it worked

#

I'll try a couple of things and get back in here in a bit, haha

winter plover Mar 6, 2019, 2:05 PM

#

good luck

lost inlet Mar 6, 2019, 3:31 PM

#

is it possible for OnConstruction to be called after replicated variables have been set?

winter plover Mar 6, 2019, 3:32 PM

#

OnConstruction only re-runs in the editor iirc

#

at runtime you wanna use an OnRep function

#

that does all the things you need it to do again

lost inlet Mar 6, 2019, 3:35 PM

#

no, it runs in cooked

#

it's the C++ equivalent of a BP construction script

winter plover Mar 6, 2019, 3:36 PM

#

yea, what I mean is it doesnt rerun at runtime if you change variables

lost inlet Mar 6, 2019, 3:36 PM

#

i know onreps can be called before BeginPlay

winter plover Mar 6, 2019, 3:36 PM

#

once it's constructed that's it

lost inlet Mar 6, 2019, 3:36 PM

#

that's not what i was asking, i do know that

#

it's if onreps can be called before it runs

winter plover Mar 6, 2019, 3:36 PM

#

I see

lost inlet Mar 6, 2019, 3:36 PM

#

they can run before beginplay

winter plover Mar 6, 2019, 3:36 PM

#

that I dont know, but you could add a guard in beginplay

#

that ignores OnRep until beginplay actually happened

hollow pond Mar 6, 2019, 3:38 PM

#

Guess what guys

#

stupidity matters more than we expect

#

nothing was wrong, at all

#

I was doing the OnRep thing and calling the Update on the GameMode BeginPlay

#

and it just happened that the listen-server client was just not fully connected during that begin play

#

I put a delay before testing out the messages and it worked

winter plover Mar 6, 2019, 3:40 PM

#

nice to hear :v

hollow pond Mar 6, 2019, 3:40 PM

#

it is counterintuitive that the listen-server wasn't ready before the other clients

#

so I didn't even think that'd be the problem at all

winter plover Mar 6, 2019, 3:40 PM

#

well in any case you might not want to have logic be dependant on order of logins

#

bit flimsy

hollow pond Mar 6, 2019, 3:40 PM

#

yeah, but it isn't

#

I was really using this way to test things out

#

was the only purpose of it

#

the client itself, after connected, register to the delegates, but at the same time reads the values from the game-state

#

I wasn't doing the read, yet, just the binding and testing them out

#

so the server one didn't get the update, but when it got to read the info from the game state they were already replicate (because they don't replicate on server) and after a small delay I'd do a bunch of changes to test the logic

#

and it updated correctly

wary path Mar 6, 2019, 8:28 PM

#

Does anyone know whether servers auto-verify (clamp?) enum value ranges in RPCs?

bitter oriole Mar 6, 2019, 8:29 PM

#

Very doubtful that they do

#

That's what Validate is for

wary path Mar 6, 2019, 8:31 PM

#

hmmm 😕

bitter oriole Mar 6, 2019, 8:32 PM

#

I mean, enum values should be pretty harmless

#

Since you never process them directly, just testing against them

wary path Mar 6, 2019, 8:33 PM

#

yeah well, I often use them for array access without checking, because I know their range

bitter oriole Mar 6, 2019, 8:34 PM

#

Let me guess, C programmer ? 😛

#

Anyway, you'd need to clamp here, or better, detect out of bound in Validate so that the player is kicked

wary path Mar 6, 2019, 8:35 PM

#

Well I will check them in Validate, won't get called often anyway.

#

Thanks 😃

fleet raven Mar 6, 2019, 8:41 PM

#

📎 unknown.png

#

it will get clamped to the next power of 2 only

wary path Mar 6, 2019, 8:43 PM

#

@fleet raven thanks for checking the code. So it would only work for bitmask enums, it seems.

fleet raven Mar 6, 2019, 8:48 PM

#

(there might be some more validation code somewhere that I missed, you should just try it I guess)

odd scaffold Mar 6, 2019, 9:22 PM

#

Hello, I started learning about multiplayer in c++ but i have a problem where I have only 1 player controller spawned in the game. This is how I know

📎 unknown.png

#

It always prints 1 no matter how many players I set in the editor PIE

grand kestrel Mar 6, 2019, 9:25 PM

#

@odd scaffold only the server has multiple player controllers. Clients only see their own. Unless it's a listen server, then it has them all

odd scaffold Mar 6, 2019, 9:49 PM

#

@grand kestrel 1 is displayed on all windows. Window on server should display all of them right?

#

Even if I check for authority it still prints 1 on all windows

📎 unknown.png

#

And I get the warning in log: "LogOnlineSession: Warning: OSS: No game present to join for session (GameSession)"

green cedar Mar 6, 2019, 10:06 PM

#

What class is recommended for keeping track of a session state across multiple maps?

#

If, for instance, a multiplayer game session progressed across maps 1, 2, and 3. And I wanted to keep track of stats (in an authoritative way) that happened in each of the levels?

#

I'd normally use game instance, but I'm not sure how that's replicated

#

I guess I could use game mode to store the variables in the server's game instance, then reload the game mode from the server game instance after travel, but that seems....not right

odd scaffold Mar 6, 2019, 10:11 PM

#

Game State

#

And it is replicated to all clients

green cedar Mar 6, 2019, 10:12 PM

#

Game State is lost during map transitions, though, isn't it?

#

I guess I could test that real quick

odd scaffold Mar 6, 2019, 10:13 PM

#

Hmm

winged badger Mar 6, 2019, 10:26 PM

#

not with SeamlessTravel

#

then it persists alongside GameMode, PlayerStates, PlayerControllers, anything attached to them, and whatever you add to the array of Actors that persist

green cedar Mar 6, 2019, 10:36 PM

#

I guess I'll have to look into SeamlessTravel then, as all of that persisting would be very helpful

tribal solstice Mar 6, 2019, 10:40 PM

#

Spent all day yesterday trying to crack this... so I'm making 'chatrooms' like so: A PC selects a room from a dropdown list. This triggers a widget to be created in the PC, and it is given a variable 'ChatroomName' which is set from the dropdown list name. Then I'm trying to show only the PCs with this same named chatroom widget open in a player list inside the room. In my GameMode on EventPostLogin I am adding new players to an array called 'AllPlayerControllers' and then running an event on GameMode which passes this array into all the connected PCs. The array is passed into the PCs and stored as an array in the PC. Then when they open their chatroom, I have it trigger a parsing logic where it ForEach loops all the PCs in the array, casts to their controllers, checks their 'Chatroom Name' variable and if it equals the owning player's PC's 'Chatroom Name', it stores them in an array of players in the same room. The last step where it's ForeEach looping the stored PCs, I get a cast failed to the PC. Here are pics:

#

📎 GM_addPCs.JPG

#

📎 GM_PCstoPCs.JPG

#

Top two screens there are GameMode

#

📎 PCAddPCs.JPG

#

📎 PCUpdatePLayers.JPG

#

These are PCs, red circle is the failing cast. Can anyone assist me with what may be the error? Or a better way to get this info and display the correct players?

plush wave Mar 6, 2019, 10:43 PM

#

How is one suppose to handle parties? I assume each platform has their one subsystem we are suppose to plug into for party functionality?

rotund sapphire Mar 6, 2019, 10:54 PM

#

Brotch you cannot replicate player controllers to other players, it's only a reference which doesnt exists on the target so you get a bunch of nulls only.

#

Just use the player state classes instead, that's available for everyone already (no need to replicate either)

tribal solstice Mar 6, 2019, 10:58 PM

#

Ahhhh, of course

#

So I should store the 'ChatroomName' variable in the PlayerState?

rotund sapphire Mar 6, 2019, 11:01 PM

#

Yes. There is also a PlayerName variable already, but its not replicated by default so you can define your own instead

tribal solstice Mar 6, 2019, 11:02 PM

#

Got it, thank you. What's the best method for collecting all the connected PC's player states?

#

So I can parse them for 'ChatroomName'

rotund sapphire Mar 6, 2019, 11:04 PM

#

You can grab access to them by using the get all actors node, it's not really efficient but probably the easy way

tribal solstice Mar 6, 2019, 11:05 PM

#

So I can do that from the owning client's PC and it should have access to all PlayerStates?

rotund sapphire Mar 6, 2019, 11:06 PM

#

Also, storing objects in arrays is a bad idea. Just avoid doing that.

tribal solstice Mar 6, 2019, 11:07 PM

#

Copy that. What's the reason?

#

Got that from the Epic tutorial

rotund sapphire Mar 6, 2019, 11:08 PM

#

Interfering with GC and your game may start leaking. Other reason is that it gets confusing walking thru arrays of nulls.

tribal solstice Mar 6, 2019, 11:09 PM

#

Got it, thank you!

#

I made a custom PlayerState, added it to my GameMode, and tried 'Get PlayerState' from my PC but I am not seeing the 'CurrentChatroom' variable in there

rotund sapphire Mar 6, 2019, 11:10 PM

#

PC has a playerstate variable indeed, but it's class is the built in playerstate class. Cast it to your own PS class first, then you can access the variable in it.

tribal solstice Mar 6, 2019, 11:11 PM

#

Of course of course.... thanks so much Robert

#

A lot to learn but you guys are all helping a ton. I appreciate it.

#

Hmm... I'm using 'Get All Actors of Class' to grab all my PlayerStates, then array out into a ForEach but it's not giving me access to the 'CurrentChatroom' variable I added inside.

bitter oriole Mar 6, 2019, 11:22 PM

#

Cast

tribal solstice Mar 6, 2019, 11:23 PM

#

@bitter oriole Instead of 'Get All Actors'?

bitter oriole Mar 6, 2019, 11:24 PM

#

No, on each resulting actor

tribal solstice Mar 6, 2019, 11:25 PM

#

I see. Weird, now it's working like this:

#

📎 currentchat.JPG

#

Wasn't letting me access before... does that look right?

rotund sapphire Mar 6, 2019, 11:31 PM

#

Foreachloop is a macro, as long as you have something connected to it, it will mimic the type of that thing.

#

If you hover the mouse over a pin you can see its class

tribal solstice Mar 6, 2019, 11:33 PM

#

Right, I think I understand better now.

winged badger Mar 7, 2019, 12:04 AM

#

@tribal solstice GameState already has an array of PlayerStates

tribal solstice Mar 7, 2019, 12:05 AM

#

Cool, so just pull from there and ForEach them to parse instead of ‘Get All Actors’?

winged badger Mar 7, 2019, 12:06 AM

#

pretty much

tribal solstice Mar 7, 2019, 12:06 AM

#

Awesome, thanks Zlo. Good to know.

winged badger Mar 7, 2019, 12:06 AM

#

also, if you want access to chatroom name client side

#

that variable needs to be replicated

#

and on the screen above it is not

tribal solstice Mar 7, 2019, 12:07 AM

#

I think that’s my issue right there. Going to test that now.

#

Even if it’s stored in a PlayerState it’s not replicated?

winged badger Mar 7, 2019, 12:08 AM

#

only replicated variables are replicated

#

and only if they are a member of replicated Actor or replicated Component belonging to replicated Actor

tribal solstice Mar 7, 2019, 12:13 AM

#

Got it! So setting 'CurrentChatroom' inside my PlayerState BP should fix that?

#

For some reason I assumed all variables in a replicated actor were automatically replicated

tribal solstice Mar 7, 2019, 12:48 AM

#

Got me one step closer, Zlo. Thank you. Now just trying to figure out why player list in widget only shows up for the server while client's is blank

tribal solstice Mar 7, 2019, 1:12 AM

#

Everything seems to be working, but when on client the Player's Names are coming up null. I'm having players select their names using a 'Change Name' node to GameMode.. does that not pass down to PlayerStates?

rotund sapphire Mar 7, 2019, 1:13 AM

#

Timing is crucially important with replication, you are probably looking for things that are yet to be replicated at that time. You could try delaying the client to show up any lists, maybe they will arrive a second later.

tribal solstice Mar 7, 2019, 1:14 AM

#

Ah I see

rotund sapphire Mar 7, 2019, 1:16 AM

#

I'm having players select their names using a 'Change Name' node to GameMode do you mean you try to call a method on gamemode, from client?

tribal solstice Mar 7, 2019, 1:16 AM

#

Yeah, looks like another issue

#

What would be the proper way to change a player's name when they select from a dropdown?

#

Just in PlayerState?

rotund sapphire Mar 7, 2019, 1:19 AM

#

client select the name from dropdown -> player controller RPC sends the info to server version of player controller -> you set the player state's variable with the name -> everybody gets it in a moment later

#

this is what you are thinking about?

tribal solstice Mar 7, 2019, 1:19 AM

#

Exactly

#

Can't figure out how to set the player name within PlayerState. Does it not already contain that variable?

#

It allows me to 'Get Player Name' from PlayerState but not 'Set Player Name'

rotund sapphire Mar 7, 2019, 1:33 AM

#

There is a chance it is read only for blueprints. You can roll your own variable however which you should set to be replicated as well. Player name is not replicated.

tribal solstice Mar 7, 2019, 1:34 AM

#

Copy that, thanks once again!

#

I'm so close...

#

Yessssssssss! Looks like it's working. Thanks to everyone once again.

#

Damn... it's working perfectly for client but server doesn't show any names but themselves in the chatroom.

#

I assume it just need an update to clear window and repopulate though...

twin juniper Mar 7, 2019, 2:15 AM

#

onRep's are called before beginplay ??

twin juniper Mar 7, 2019, 2:40 AM

#

https://answers.unrealengine.com/questions/368963/client-rpc-handles-earlier-than-beginplay.html

.

tribal solstice Mar 7, 2019, 3:02 AM

#

Looks like my last issue is that on the server the player that enters the room has the same name as the server. On client everything looks/works perfectly. I think it may be be how I'm changing the PlayerState 'PlayersName' variable?

#

Name selection blueprint looks like this:

#

📎 widget.JPG

#

PlayerController logic:

#

📎 playercontr.JPG

fresh saddle Mar 7, 2019, 5:15 AM

#

Does anyone know of a way to have a primitive component replicate it's variables once then set it's replication to false?

Seems that this is only possible with Actors and not Components

#

I have the DOREPLIFETIME_CONDITION set to COND_InitialOnly however I still want to disable bReplicates as I don't need any location replication happening on the component

autumn swift Mar 7, 2019, 8:16 AM

#

Anyone know how to do a check for dlc in steam using blueprints?

#

Mention me while answering plz

chrome bay Mar 7, 2019, 9:42 AM

#

@fresh saddle conditional flags work fine on components too

real yacht Mar 7, 2019, 9:52 AM

#

📎 unknown.png

#

when match is started, do you think it's correct to send match time (float) every second to clients, so clients can display remaining time on UI

#

or, server just send matchHasStarted, and every client tick for himself and display time?

hushed warren Mar 7, 2019, 10:02 AM

#

What you can do is just send a timestamp of when the match started (GetGameTimeInSeconds) from there you can get the Elapsed Time by comparing the timestamp you sent to the client time. And from the elapsed time you can get remaining time by subtracting the match duration by elapsed time. This way you can save a bit of bandwidth by only having to send a value once

chrome bay Mar 7, 2019, 10:03 AM

#

GameState already has a "Remaining Time" value IIRC

#

Annoyingly, it does replicate every frame

fresh saddle Mar 7, 2019, 10:04 AM

#

@chrome bay oh, I know they do. But that's not what I was asking aha

thin stratus Mar 7, 2019, 10:05 AM

#

GameState has no RemainingTime o.o

chrome bay Mar 7, 2019, 10:05 AM

#

ah good..

thin stratus Mar 7, 2019, 10:05 AM

#

What would that be based on :P

chrome bay Mar 7, 2019, 10:05 AM

#

Maybe I've spent too much time in bloody shootergame templates

thin stratus Mar 7, 2019, 10:05 AM

#

Like, you would need a MatchTime setting too

#

You did

#

UT replicates remaining time every 10 seconds

#

// Only sync the remaining time every 10 seconds
if (GetWorld()->GetNetMode() != NM_Client)
{
    const int32 RepTimeInterval = 10;
    if (RemainingTime % 10 == RepTimeInterval - 1)
    {
        ReplicatedRemainingTime = RemainingTime;
        ForceNetUpdate();
    }
}

hushed warren Mar 7, 2019, 10:06 AM

#

/** Elapsed game time since match has started. */
UPROPERTY(replicatedUsing=OnRep_ElapsedTime, BlueprintReadOnly, Category = GameState)
int32 ElapsedTime;

Apparently theres an elapsed time var thats updated every second

chrome bay Mar 7, 2019, 10:06 AM

#

That's tagged with Init Only

thin stratus Mar 7, 2019, 10:06 AM

#

Yop, but that's the other way round

#

:D

#

GameState has a "DefaultTimer" though that runs every second by default

meager spade Mar 7, 2019, 10:07 AM

#

so every 10 seconds it forces a netupdate aswell

#

to make sure everyones in synch

thin stratus Mar 7, 2019, 10:07 AM

#

Yop

meager spade Mar 7, 2019, 10:07 AM

#

interesting

thin stratus Mar 7, 2019, 10:07 AM

#

I'm still confused why RepTimeInterval is set to 10

#

And then RepTimeInterval - 1 is used

#

I mean, just put the freaking 9 into it and write a comment!

#

(Says the one who basically copy pasted the code from its own repo)

meager spade Mar 7, 2019, 10:08 AM

#

well ya know lol

#

it works..

real yacht Mar 7, 2019, 10:10 AM

#

so, what should i take and use? 😃

thin stratus Mar 7, 2019, 10:12 AM

#

Have a Timer that runs on the GameState for everyone.
Set the Timer to loop every second.
Have a "RemainingTime" variable that is not Replicated and reduce it every time the Timer calls (would use an integer, not a float).
Have an additional "ReplicatedRemainingTime" variable, that is set to "RepNotify".
Update this one only every 10 seconds (see code I posted).
In the OnRep of the Variable, simply set "RemaingTime" to the "ReplicatedRemainingTime".

#

That way every player counts down on their own and once every x seconds you make sure everyone is in sync.

#

The timer is only simulated for clients anyway, they should never execute anything based on it

real yacht Mar 7, 2019, 10:14 AM

#

okay, thnx, and yes, nothing is executed on client based on timer, i have matchFinished on server that inform clients that match has finished

thin stratus Mar 7, 2019, 10:15 AM

#

If you really want to use UE4's internal logic (which is often better cause a lot of other stuff depends on it), you should look into using the MatchState

real yacht Mar 7, 2019, 10:16 AM

#

im using that

thin stratus Mar 7, 2019, 10:16 AM

#

There is an "OnMatchStateChanged" or so function in the GameState

#

That calls if you set the MatchState

real yacht Mar 7, 2019, 10:16 AM

#

yes

thin stratus Mar 7, 2019, 10:16 AM

#

In C++ you could extend the enum but technically you can still use custom State names if needed in BPs

real yacht Mar 7, 2019, 10:16 AM

#

yep, i figure out that i can add state names in BP

#

okay, i will refactor match timer for now, everything other is okay.

#

thnx

#

@thin stratus is this code running on server or client?

thin stratus Mar 7, 2019, 10:25 AM

#

The code I posted is running on both, but the IF is limiting it to the Server

#

So yeah on Server I guess

winged badger Mar 7, 2019, 10:34 AM

#

i would definitely use floats for that, and wouldn't overwrite if its "close enough"

#

don't want to cause visible timer to jitter

thin stratus Mar 7, 2019, 10:43 AM

#

We use integer and I never had the Timer jittering

#

But of course, if you see the timer misbehaving cause of the integer, feel free to use floats

gentle drum Mar 7, 2019, 11:09 AM

#

Hi everyone , we just migrated to 4.21 from 4.19 and already facing an issue with the online subsystems. We are using steam online subsystem on clients and null on the servers. In 4.20 i understand that on prelogin it checks for the OSS types to be the same. so we override prelogin to skip the check. but we are facing an issue with the FUniqueNetID causing a crash. i already pin point where it happens (FUniqueNetIdNull) but this means we are no longer able to have different subsystems connecting to a server with null OSS. anyone have faced this or have any solutions? thanks

thin stratus Mar 7, 2019, 11:13 AM

#

Hm, on one side, it sounds normal that you need the same subsystem on both

#

On the other side, if you just want the Subsystem stuff of Steam that has nothing to do with Connecting and Sessions, etc. it would make sense to use it only on the Client

gentle drum Mar 7, 2019, 11:13 AM

#

Right yeah , and our servers are managed by the backend and have no use for steam

thin stratus Mar 7, 2019, 11:14 AM

#

What exactly does the crash say anyway?

gentle drum Mar 7, 2019, 11:15 AM

#

So basically on Null SubSystem , it uses FUniqueNetIdNull and it in the consturctor it also checks if the Types are the same

#

📎 unknown.png

#

So when the Client sends their Unique Net Id it has the type steam but here It's checking if the type Is equal NULL_SUBSYSTEM

thin stratus Mar 7, 2019, 11:18 AM

#

Isn't there a way to let the Client use the null id?

#

Or do you need the SteamId?

gentle drum Mar 7, 2019, 11:19 AM

#

Yeah i tried to get the actual player id (SteamID) and create a FUniqueNetIdNull on server and then pas that through login

thin stratus Mar 7, 2019, 11:19 AM

#

You could also try to just convert the null one to a steam one in PreLogin

#

Hm

gentle drum Mar 7, 2019, 11:19 AM

#

Yeah it fixes the issue but it also replicates that to the other clients and kinda losses the steam id

#

we won't be able to get names , avatars and steam related methods

thin stratus Mar 7, 2019, 11:20 AM

#

What keeps you from just enabling Steam on the Server anyway?

gentle drum Mar 7, 2019, 11:21 AM

#

We are using our own backend matchmaking and start servers on demand and connect through ip. also we are using gamelift

thin stratus Mar 7, 2019, 11:21 AM

#

And the Steam stuff blocks ip connections?

gentle drum Mar 7, 2019, 11:21 AM

#

yeah Steam uses same ports instead of incrementing them from 7777 , adn on gamelift we have no way of passing the port

thin stratus Mar 7, 2019, 11:22 AM

#

Well another thing you can try is Using Steams Subsystem but not the NetDriver

#

And then passing the SteamID by hand

#

And saving/replicating it

#

(on the client it is)

gentle drum Mar 7, 2019, 11:23 AM

#

Right but from what i tried , we aren't able to run multiple steam servers on one machine

#

the second instance always complains that failed to initilaize this could be due to a Steam server and client running on the same machine

#

My last option would be to create a SubSystem and only implement the Steam Features we need . on the server we just don't initialize it, this way client and server will be using the same unique net id

thin stratus Mar 7, 2019, 11:27 AM

#

That's because you are missing the dlls

#

You have to put the steam dlls into the binaries folder of the Server

#

Then it starts without that issue

#

You have multiple options:

You turn off SteamSubSystem for the Server and the try to keep it active on the Client, but turning off the NetDriver. Then you would pass the SteamID by hand as an option.
You turn SteamSubsystem on for the Server and Client and just don't care about it, but that might kill the IP Connection as Steam usually handles this via the SteamID (would need to try that).
You completely kill off the build in Subsystem and either implement the Steam API yourself OR invest some Dollars into UWorks, which is basically a full Steam API. You'd then pass the ID similar to option 1.

#

Idk if option 1. even works. It's just an idea.

#

If option 2. works with connecting via IP, then that would be the easiest solution

gentle drum Mar 7, 2019, 11:30 AM

#

Right yeah i think i'll try to have the servers use steam Subsystem which i think would solve a lot of issues at once

#

Yeah i was also thinking about using null online subsystem for both server and client and write steam api request that we only use

#

since we only use auth , achievement and avatar and few small utilities

#

anyway thanks a lot for tips Cedric!

thin stratus Mar 7, 2019, 11:36 AM

#

no biggie, good luck!

ivory portal Mar 7, 2019, 12:06 PM

#

How would you high-levelly give players their own nickname?

#

Like, I know to use playerstate

thin stratus Mar 7, 2019, 12:10 PM

#

If you know about the PlayerState, I don't get the question

ivory portal Mar 7, 2019, 12:20 PM

#

Ok, maybe did my question wrong. When I am not connected to server yet my player chooses his name

#

Then when he connects to server, how do I tell the server my playername?

#

Save it like in GameInstance?

#

and then on connection RPC it to the server?

thin stratus Mar 7, 2019, 12:21 PM

#

Via Blueprints, probably by saving it in the GI or as a SaveGame

#

OnPostLogin -> ClientRPC -> ServerRPC -> ChangeName

#

RPCs should be in the PlayerController

#

ChangeName is a GameMode function

ivory portal Mar 7, 2019, 12:22 PM

#

Does PlayerController have PostLogin?

thin stratus Mar 7, 2019, 12:22 PM

#

GameMode does

ivory portal Mar 7, 2019, 12:22 PM

#

ah so the client gamemode also has a postlogin trigger?

thin stratus Mar 7, 2019, 12:25 PM

#

Client doesn't even have a GameMode

#

I told you the chain of events you have to call

#

GameMode::OnPostLogin->PlayerController::GetClientName (ClientRPC)->PlayerController::SendClientName (ServerRPC)->GameMode::ChangeName

#

The PlayerController functions are something you have to created

ivory portal Mar 7, 2019, 12:28 PM

#

Ah oke, yes indeed

#

Thanks for the explanation!

thin stratus Mar 7, 2019, 12:41 PM

#

Is it somehow possible to have a boolean not call OnRep on spawn?

#

The Boolean is FALSE by default and even though it's not set to TRUE, it calls OnRep

#

Which does something that I don't want it to do

#

Cause well, only TRUE -> FALSE should cause it, not FALSE -> FALSE

#

SkipInitial isn't a thing

#

.>

real yacht Mar 7, 2019, 12:44 PM

#

@thin stratus so when i do repNotify on ReplicatedRemainingTime, should i check on client is remainingTime != ReplicatedRemainingTime so i can correct time if not in sync

thin stratus Mar 7, 2019, 12:44 PM

#

Does it matter if it sets it even if it's the same? :P

green cedar Mar 7, 2019, 12:44 PM

#

Does anyone have a graph or page where it shows the event dispatchers/events called when a ServerTravel is issued?

#

I guess I could also jump into the c++, but I am being lazy 😛

thin stratus Mar 7, 2019, 12:45 PM

#

@chrome bay Any experience with a boolean calling OnRep when the game starts even though it's FALSE -> FALSE?

#

I thought only value changes cause this

#

https://i.imgur.com/Nx7IZdU.png

Imgur

#

Guess this does the job for now

ivory portal Mar 7, 2019, 12:51 PM

#

eXi, maybe use a GATE and open it in the first call?

#

Also, are the docs down?

thin stratus Mar 7, 2019, 12:52 PM

#

Yop they are

ivory portal Mar 7, 2019, 1:11 PM

#

When a player is a spectator, does he still have a playercontroller but just not a pawn?

chrome bay Mar 7, 2019, 1:17 PM

#

@thin stratus yeah sometimes, though it does seem odd

thin stratus Mar 7, 2019, 1:18 PM

#

@ivory portal Yes

chrome bay Mar 7, 2019, 1:18 PM

#

I wonder if BP rep notifies are a bit "dumber" and just call the rep function anyway regardless of old value

ivory portal Mar 7, 2019, 1:18 PM

#

Thanks

ivory portal Mar 7, 2019, 2:24 PM

#

Maybe a weird question. I've created a LobbyController, for my main multiplayer map I'll have my MainController. Now, when I do a seamless travel it states that my controller will also move but I've got different controllers? So I guess the new controller will just take over. But how do you pass information from one controller to the other one? I thought through the server game instance but how does this instance knows which player got which controller? I can't seem to find a really good explanation about this in the docs 😕

thin stratus Mar 7, 2019, 2:29 PM

#

SeamlessTravel only works if you ServerTravel. Connecting to a Server is always a HardTravel, not a SeamlessTravel!
In case you do perform a ServerTravel, which you must mark Seamless via the GameMode, the GameMode offers a function called "OnSwapPlayerContollers", which passes you both old and new Controller.

#

A good thing is to have a common base PlayerController class parent which defines data you want to pass.

#

Then you can blindly cast the two controllers that OnSwap gives you and pass data, without having to juggle if it's a Main or a Lobby Controller.

ivory portal Mar 7, 2019, 2:35 PM

#

Ah, that's a good explanation. Thanks. (With Lobby I meant the lobby where players connect to to choose a team)

#

And thanks for the hint for the parent-controller

fleet raven Mar 7, 2019, 3:43 PM

#

are rpcs processed before or after world ticks every frame?

chrome bay Mar 7, 2019, 3:49 PM

#

before

fleet raven Mar 7, 2019, 3:57 PM

#

that's good

chrome bay Mar 7, 2019, 4:00 PM

#

I do wish they'd update timers before they're processed, but alas 😦

fleet raven Mar 7, 2019, 4:09 PM

#

interesting

#

seems like timers also run after ticks

timber anchor Mar 7, 2019, 9:16 PM

#

Is there a way to disable the SSL certificate for unreal engine 4?... since i haven't the certificate and i can't even retrieve the data from my VPS!..

fleet raven Mar 7, 2019, 9:21 PM

#

what certificate ?

green cedar Mar 7, 2019, 10:54 PM

#

you'd likely have to custom implement whatever you are using to call your VPS

#

https://www.example-code.com/cpp/ssl_client_certificate.asp

#

Unless whatever plugin you are using has a solution for it

unborn nimbus Mar 7, 2019, 11:28 PM

#

Anyone use gamelift?

gleaming vector Mar 8, 2019, 12:41 AM

#

I tried but didnt get far

#

switched to playfab instead

worn hill Mar 8, 2019, 12:47 AM

#

<Sorry to cut in>
Where should I put a game/round timer that should be the same for everyone? I currently have the timer logic in the player controller..

I did start reading that Network compendium.

#

Curious if all the info in there is still applicable to current engine versions.

#

Ah sorry. I found Exi's comment on the subject here :
https://forums.unrealengine.com/development-discussion/blueprint-visual-scripting/78103-best-way-to-do-a-timer-in-network-game

Unreal Engine Forums

Build powerful visual scripts without code.

brave moon Mar 8, 2019, 2:44 AM

#

Anyone know how to solve this? (https://answers.unrealengine.com/questions/577731/player-name-tags-all-showing-the-viewers-name.html), when trying to set player name above players head, my name is showing on different player

ivory portal Mar 8, 2019, 7:15 AM

#

Im also working with Gamelift Dirtsleeper but I am using the plugins that we found on the marketplace

harsh lodge Mar 8, 2019, 10:54 AM

#

Is it possible to host a session over internet without using a dedicated server?

thin stratus Mar 8, 2019, 11:11 AM

#

Yes, UE4 supports ListenServers

#

Which means one of the players is the server.

#

This opens up the game for cheating though so I wouldn't use that for any sort of competitive game

#

@harsh lodge

harsh lodge Mar 8, 2019, 11:19 AM

#

No I'm not create a game I'm just creating a vr application to connect players over internet and have voice chat . I can successfully create session as listen server over lan. But dont have any idea about doing over internet. Can u please help me @thin stratus

thin stratus Mar 8, 2019, 11:20 AM

#

For "over the internet" you are in need of some sort of MasterServer.

#

That Server usually acts as a central information point where Servers register sessions and players search for sessions.

#

Steam offers one, but obiously also takes the 30% cut.

harsh lodge Mar 8, 2019, 11:21 AM

#

I want to do with default platform as I am targetting cross platform

#

Without steam

#

Like is it possible to host a session just by using create session and opening the port where application listens so that client can join using my public IP?

thin stratus Mar 8, 2019, 11:22 AM

#

Sessions have nothing to do with direct IP connection

#

A "Session" is the information about your hosted "game" or "server".
If you "CreateASession", you basically tell a MasterServer "Hey, this is my Server, with this IP, these many players." etc.
Players can then find these and join them.

If you however don't have a MasterServer, all you can do is connect directly via IP, which requires the other players to know the IP (which usually is not the case, if not friends that share the IP by hand) as well as requiring the host to make sure ports are opened up properly.

harsh lodge Mar 8, 2019, 11:25 AM

#

So how to connect directly via ip

thin stratus Mar 8, 2019, 11:25 AM

#

Connecting directly via IP is a very manual and user-unfriendly thing.

harsh lodge Mar 8, 2019, 11:25 AM

#

I'm okay with sharing public ip

#

I'm just testing things out

thin stratus Mar 8, 2019, 11:25 AM

#

You can use the "ExecuteConsoleCommand" node and pass in open <IPADDRESS>

#

where <IPADDRESS> would be the ip

#

UE4's ListenServer listens on port 7777 by default

harsh lodge Mar 8, 2019, 11:26 AM

#

This will help them join the session itself or they will just get connected?

thin stratus Mar 8, 2019, 11:26 AM

#

This does not use any sessions

harsh lodge Mar 8, 2019, 11:27 AM

#

While creating a session should I include any parameters to setup for internet?

thin stratus Mar 8, 2019, 11:27 AM

#

You don't create sessions for direct IP connection

#

Sessions are, as already said, only information about your server, so you can easier share it.

#

It's like a post-it with ip, name, etc. on it

#

Not required for direct ip connection

#

Server simply uses the OpenLevel node

#

With ?listen as a parameter

#

And the Clients try to use open <IPADDRESS>

#

That's all

harsh lodge Mar 8, 2019, 11:28 AM

#

No if I want to allow multiple players ?

thin stratus Mar 8, 2019, 11:28 AM

#

Has nothing to do with multiple players

harsh lodge Mar 8, 2019, 11:29 AM

#

Ok from what I understood I need to create a dedicated server and allow clients to host a session rigtht?

#

If need to do without transparency?

thin stratus Mar 8, 2019, 11:31 AM

#

You seem to mix up a bit of stuff :P

harsh lodge Mar 8, 2019, 11:32 AM

#

Like without creating session how will I make clients find my game?

#

Can u dm me clearly and explain things up.😬

#

Please?

thin stratus Mar 8, 2019, 11:33 AM

#

Server Types (nothing to do with Sessions):

DedicatedServer: A Server that can be hosted on any sort of "PC", usually hosted away from Clients. Will run even if no Clients are connected.
ListenServer: A Server hosted by a Client. The Client will act as Host and Player in one. If this Client stops playing, the Server will stop existing.

Ways of Connecting (can be applied to both Server Types):

Direct IP: Requires Host to share IP and open up Port/s.
Session-Based: Allows Server to register a Session on the Backend/MasterServer. Players who want to join a Server can request a List of Servers from the Backend/MasterServer.

#

Like without creating session how will I make clients find my game?
You have to share the IP of the Server.

harsh lodge Mar 8, 2019, 11:35 AM

#

So in direct ip connection I don't need to create a session right?

#

And for dedicated setup can players create a session or the server itself should create

#

@thin stratus please help me with the dedicated server setup

thin stratus Mar 8, 2019, 11:39 AM

#

There is a Wiki tutorial on how to create your own DedicatedServer

#

Please follow that

harsh lodge Mar 8, 2019, 11:40 AM

#

I mean not creating it. How to make player join or should player create a session in the dedicated server

thin stratus Mar 8, 2019, 11:42 AM

#

I already listed that above

#

DedicatedServer will listen on Port 7777

#

You need to make sure that the PC you host that thing on has that port open

#

And then get its Public IP

#

players can join it via the open <IPADDRESS> command

#

That's all

#

Sessions aren't required for direct ip connection :P last time I repeat myself.

bitter oriole Mar 8, 2019, 11:45 AM

#

As Cedric said sessions have 100% nothing to do with your multiplayer architecture

#

They're a layer on top of it to avoid using IP addresses

#

And they provide matchmaking and other nice stuff

harsh lodge Mar 8, 2019, 11:52 AM

#

How players can join in dedicated server without sharing its public IP?

#

Or how does a dedicated server creates a session without user intervention?

bitter oriole Mar 8, 2019, 11:58 AM

#

They can't and no

tribal solstice Mar 8, 2019, 11:59 AM

#

I've been working on this for two days and I've tried every possible combination of replication and many different ways to do this, but for some reason I just can't get it to work. When a player selects a chatroom name from a dropdown list, it executes an event to create a widget on their screen. Then it calls a function to set the 'Current Chatroom' variable within the PlayerState as the name of the created widget. No matter what combinations I've tried I can't get both the server and client to display the correct Current Chatroom variable for all connected controllers. If anyone could point me in the right direction I'd be very grateful. Here's the event that's fired after a chatroom is selected from the dropdown:

bitter oriole Mar 8, 2019, 11:59 AM

#

You need to create a session to get rid of IPs

tribal solstice Mar 8, 2019, 11:59 AM

#

📎 chat1.JPG

#

and here's the event that tries to assign the 'Current Chatroom' variable in the PlayerState:

#

📎 chat2.JPG

#

I'm sure I'm screwing up the replication somewhere but I cannot find out whats wrong for the life of me

harsh lodge Mar 8, 2019, 12:00 PM

#

@bitter oriole the session should be created by dedicated server itself or by a player?

thin stratus Mar 8, 2019, 12:06 PM

#

@harsh lodge DedicatedServers have no players when its getting created

#

If you do work with sessions, a DedicatedServer has to register/create the session by itself

#

A ListenServer does this when actively clicking "host game" or whatever your UI looks like

#

But Sessions require a masterServer

#

And there is no crossplatform service yet

#

At least non that works out of the box

quartz vessel Mar 8, 2019, 12:26 PM

#

I'm trying to create a party session (on xb1) so that friends can join eachother, form a team etc, before entering matchmaking together. I've been doing this initially via the online session interface, but this seems to really be made for the game session alone. Should I instead be going to the live session interface, or even xbox live sdk directly?

#

Oh, and nice compendium Cedric 😉

chrome bay Mar 8, 2019, 12:30 PM

#

Gears of War handled it using Beacons

#

lemme try and find the post

harsh lodge Mar 8, 2019, 12:32 PM

#

@thin stratus thanks for your brief explanation

quartz vessel Mar 8, 2019, 12:41 PM

#

@chrome bay I'll have to look at how Beacons are implemented, but if they aren't implemented as a live session under the hood then (afaik) the player won't be joinable from the xbox friends menu.

chrome bay Mar 8, 2019, 12:43 PM

#

My understanding is that you create a session for the party, have players join that session via beacons. The beacons are then used for matchmaking and trying to join a session with all players in your party, then you kill the party session, move to the game session and reconnect with your party.

#

UT doesn't use a session for parties IIRC.. they actually use the beacons to communicate through some XMPP backend of Epic's own making (but that's not available to us ofc)

quartz vessel Mar 8, 2019, 12:45 PM

#

bloody hell, sounds like a lot of messing around

chrome bay Mar 8, 2019, 12:47 PM

#

It's no walk in the park for sure. There's a plugin on marketplace which does it similar to the gears-approach for Steam.

#

But yeah, they have an IOnlinePartyInterface which is designed to work with the Online Sub System, but the only implementation is via Epic's online services and that hasn't been released

quartz vessel Mar 8, 2019, 12:48 PM

#

indeed

#

I might just go down the road of interacting directly with xbox live. We're already going to need a lot of custom party stuff because we're using our own matchmaking service, and it'll have to keep in synch between our online services party and the xbox live party

chrome bay Mar 8, 2019, 12:49 PM

#

The party beacon code is what you are looking for. That code was ported from UE3 which we used on Gears and is most likely the basis of what Rocket League is doing. The way it works is that someone hosts and friends join that hosts session. The host then performs the matchmaking search for a match. The beacon itself doesn't implement everything that is needed since much of it is game specific, but it is the foundation

#

from here: https://answers.unrealengine.com/questions/348614/view.html

quartz vessel Mar 8, 2019, 12:50 PM

#

Nice one, thanks

chrome bay Mar 8, 2019, 12:50 PM

#

NP's. I thought there was more info than that somewhere but I can't seem to find it. Joe Graf is the man when it comes to that kind of thing, if you're able to reach out to him.

quartz vessel Mar 8, 2019, 12:53 PM

#

Yeah, might stick a pin in it and post on UDN.

remote crystal Mar 8, 2019, 1:39 PM

#

Split screen - 1st camera have aspect ratio constraint

📎 unknown.png

#

can i put a widget over the black space?

maiden vine Mar 8, 2019, 2:50 PM

#

What's the proper way to replicate set master pose component node?

#

anyone have a link on how to do this?

ebon bramble Mar 8, 2019, 3:36 PM

#

Just make a custom event that replicates to all

#

Highlight the custom event as if you are going to rename it and pull down the replicates drop-down ... Yeah

#

I have a question. I made a relatively simple multiplayer game with a dedicated server and I built the server executable for Linux in development mode. When I run the executable on a Linux server, it takes over 3 GB of RAM !!!!

#

I'm reading the forums and a game like Squad can support 70 players and only takes 0.5 GB

#

So what am I doing wrong. If I export for Shipping would that be way better ?

fluid crag Mar 8, 2019, 4:05 PM

#

I am trying to run NDisplay template in multiplayer but game crashes when I switch level

rotund sapphire Mar 8, 2019, 4:32 PM

#

Is it possible with CMC to apply network corrections on the autonomous proxy in a fashion that it would smoothly rubberbanding (in a span of a couple of frames) and not just teleporting the character to the corrected location instantly?

chrome bay Mar 8, 2019, 4:32 PM

#

The capsule needs to have it's position set instantly, otherwise you'd be constantly out of sync and sending bad moves continously

#

The mesh can be moved at will

#

Which is what it should be doing already, smoothly interpolating the mesh to the capsule over time

rotund sapphire Mar 8, 2019, 4:36 PM

#

Do you mean, the character class by default should do this interpolation already, or is it something i should i have think about before design the character?

chrome bay Mar 8, 2019, 4:37 PM

#

The capsule will always snap - but yes the mesh should interpolate

#

However, it depends on the size of the correction

#

If you're getting massive amounts of rubber banding, that indicates the client is regularly predicting and/or replaying something incorrectly

rotund sapphire Mar 8, 2019, 4:41 PM

#

The correction only happens when theres a delay applied, but even then i only get a correction when i make sudden changes in directions, which i believe is acceptable. The bigger problem is however when i play root motion animations and introduce aiming which is changing the direction of the animation, there client and server will happen to disagree easily - apparently because the aiming is not synchronized properly by the CMC (or me). This slight change however causing multiple teleports to occure. It will recover from that error when i start moving normally again.

chrome bay Mar 8, 2019, 4:43 PM

#

Root motion I'm less familiar with, but yeah I imagine in that case it gets harder

rotund sapphire Mar 8, 2019, 4:44 PM

#

It works quite well already, tho i had to change a few ini settings to smooth it out a bit. Still the teleportation is very visible artifact which i'd like to get rid of. Probably the idea you outlined will be the ultimate solution to hide this error well enough it wouldnt cause visible errors this frequently.

chrome bay Mar 8, 2019, 4:46 PM

#

Yeah I think making sure the animation is synchronised as best as possible is a start - it looks as though character movement still does smoothing when using root motion

rotund sapphire Mar 8, 2019, 4:48 PM

#

Remote proxy is playing the root motion animations without root motion, and instead the capsule is moving the character's placement, so it looks smooth but not very accurate - not much i can do about this i believe. This apparently is the way i suppose to use RM over network.

chrome bay Mar 8, 2019, 4:49 PM

#

Jesus, just looking at this abomination of an article

#

https://wiki.unrealengine.com/Networked_Locomotion_System_using_Root_Motion

#

Yeah that sounds about right actually

#

Root Motion would perhaps, "fake" move the capsule then move the mesh the same way it normally would

#

Allows for smoothing and predictable movement then at the cost of accuracy

#

Man.. setting replicated vars from input functions with reliable RPC's. I've seen it all now.

#

In order to properly use Root Motion, it is important to note that the Root Bone of your character should be at the origin (0,0,0 with no rotation) as this allows the system to isolate physical movement (capsule) from animated movement (character).

fleet raven Mar 8, 2019, 4:52 PM

#

is being at 0 not the whole point of a root bone? 🤔

chrome bay Mar 8, 2019, 4:53 PM

#

I wonder if they mean in relation to the capsule?

#

But yeah... sentence makes little sense haha

sharp pagoda Mar 8, 2019, 4:55 PM

#

🤔 this guy just pushes asset flips on steam

📎 unknown.png

#

Wow you weren't joking about it being an absolute abomination

chrome bay Mar 8, 2019, 4:58 PM

#

Multiplayer tutorials that only work in PIE are the best

rotund sapphire Mar 8, 2019, 4:58 PM

#

My bad i didnt mention, that i do not use root motion for locomotion, but instead playing short sequences in slots for attack / defending etc.

chrome bay Mar 8, 2019, 4:59 PM

#

Ah I see

rotund sapphire Mar 8, 2019, 5:25 PM

#

TheJamsh, just added a new scene comp, i call it CharacterMeshWS, but it's not attached to the actor, leaving it in world space. I attach the Character class' default Mesh to this comp instead. All i had to do is just interpolate the transform of this scene comp and the capsule, it is indeed smooth this jittering quite well. Will be thinking more about this idea, but its a progress. Thanks for the idea!

keen wren Mar 8, 2019, 5:28 PM

#

Does anyone know if OnRep functions call on a client when the client connects to a server late? Example: A different client invokes a server call to change an OnRep variable, after the variable has been changed and another client joins the game, will their OnRep function call once they receive the replicated variable? Because it doesn’t seem to occur on my side, does anyone know how to make sure the OnRep function calls on a late joining client?

chrome bay Mar 8, 2019, 5:29 PM

#

@keen wren They will fire but only if the value is different to the default

#

E.g, if the default value is false, the server changes to 'true' and 'false' and the player joins while false, the OnRep won't fire

keen wren Mar 8, 2019, 5:30 PM

#

That’s odd, the OnRep doesn’t call on my side even though its value is different. Guess it’s time to print logs, thanks for the confirmation though I appreciate the help 😃

mental vortex Mar 8, 2019, 8:16 PM

#

^ steamclient64.dll is provided (and loaded) but it fails with app ID 0 and steam init returns 0.

twilit swift Mar 8, 2019, 9:49 PM

#

Hey all, I'm having this issue when I call UWorld::AddToWorld() as a server that it causes all the clients' movement to judder and rubberband back to where the client was when the Server called AddToWorld(). When I call the same function from the client it doesn't affect any of the other clients or the server (as expected). Anyone see something like this before?

#

I'm adding a duplicate level to the world for a killcam and I found that after the Server calls AddToWorld(), the client's player controller is set to local for the server.

#

Before the call it's remote, obviously.

#

very spooky.

#

I guess the thing I'm really wondering is what about AddToWorld() is affecting clients? Here's how I'm declaring the function it's called by:

    void AddDuplicateLevelsToWorld();```

```void UMyGame_GameInstance::AddDuplicateLevelsToWorld_Implementation()
{
    // Run AddToWorld() 
}```

tribal solstice Mar 8, 2019, 10:13 PM

#

Been working on this all morning and still can't seem to get the client's CurrentChatroom variable to display on the server. It only shows the default. I've tried every single combination of replication that I can think of and still no luck. On the client, it displays it's own CurrentChatroom correctly, and the server's CurrentChatroom correctly. The server shows it's own correctly but shows default (or no change) on the client's. Here are the blueprints - first is Chatroom Select widget. Second is the first function it calls to create the chatroom and assign it a name. Third is the function called next that applies the chatroom' s name to the PlayerState in a variable called CurrentChatroom. Any hints towards the right direction would be amazing. I can't wrap my head around what I'm doing wrong but I'm sure it's something simple I'm missing. Thanks guys!

#

📎 chatroomselect.JPG

#

📎 enterchatroom.JPG

#

📎 chatroomaddinfo.JPG

tribal solstice Mar 8, 2019, 11:20 PM

#

I guess the base question is what is the best way set a variable in the PlayerState so that it is available to server and client and can be pulled by either and used for logic?

thin stratus Mar 8, 2019, 11:38 PM

#

@tribal solstice Pretty straight forward: Widgets aren't meant to be replicated

#

📎 unknown.png

#

This part won't work. You can't replicate that variable

#

Widgets will and should only exist on clients (despite ListenServer, but that's a client too in some way)

tribal solstice Mar 8, 2019, 11:39 PM

#

Right, so the incoming chatroom name should be stored in the PC as a replicated variable

#

?

thin stratus Mar 8, 2019, 11:39 PM

#

You have a ServerRPC

#

Ever gotten the idea of just passing the String in that? ;)

tribal solstice Mar 8, 2019, 11:40 PM

#

I think I did try that. I have honestly tried 100s of different things over the last few days but I think I fried my brain

#

How exactly do you mean?

thin stratus Mar 8, 2019, 11:41 PM

#

Widgets don't replicate.
Variables in Widgets don't replicate (means your "ChatroomName" variable that is inside your ChatroomMenu shouldn't be marked as Replicated.

#

Nothing in a widget should be

#

Neither should a Widget have RPCs

tribal solstice Mar 8, 2019, 11:41 PM

#

Yeah, I get it

thin stratus Mar 8, 2019, 11:42 PM

#

Replicated Variables only replicate in Replicated Actors (which is why it won't make sense to have them in a Widget)
Replicated Variables only do that if the Server sets them.
If you are a client and you want a Variable to replicate, you have to use a ServerRPC and pass the value to the Server

#

So you'd just add an input to the ServerRPC of Type string

#

And pass the room name of the Client along

tribal solstice Mar 8, 2019, 11:43 PM

#

I think I'm following, I'll send a screenshot in a sec if you don't mind

thin stratus Mar 8, 2019, 11:43 PM

#

If you hurry, I'm about to go to bed

tribal solstice Mar 8, 2019, 11:45 PM

#

Posting now

#

📎 1.JPG

#

📎 2.JPG

thin stratus Mar 8, 2019, 11:46 PM

#

Close

#

Remove that IsValid + ChatRoom thing

#

And change all Widger relevant stuff/variables to not replicate

tribal solstice Mar 8, 2019, 11:47 PM

#

Copy that... changing now

thin stratus Mar 8, 2019, 11:47 PM

#

Anyway, that looks good so far. G2g though

#

Good luck!

tribal solstice Mar 8, 2019, 11:48 PM

#

📎 1.JPG

#

📎 2.JPG

#

thanks so much eXi, once again you've been a huge help

twilit swift Mar 9, 2019, 12:06 AM

#

Found a pretty big clue, I think.

#

Anyone ever see this log message before?

    {
        if (bBaseRelativePosition)
        {
            UE_LOG(LogNetPlayerMovement, Warning, TEXT("ClientAdjustPosition_Implementation could not resolve the new relative movement base actor, ignoring server correction!"));
            return;
        }
        else
        {
            UE_LOG(LogNetPlayerMovement, Verbose, TEXT("ClientAdjustPosition_Implementation could not resolve the new absolute movement base actor, but WILL use the position!"));
        }
    }```

#

It's in ACharacterMovementComponenet::ClientAdjustPosition_Implementation()

#

It seems something I'm doing on the server is causing the client movement component to have an unresolved base

tribal solstice Mar 9, 2019, 2:50 AM

#

Where is the best place to trigger an event globally for all PlayerControllers? GameMode?

grand kestrel Mar 9, 2019, 3:04 AM

#

Just to reconfirm - if the server sets two separate replicated variables, one with repnotify, when the repnotify is called, they'll both have been set? Meaning all replicated variables are set prior to any OnRep being called for that tick?

tribal solstice Mar 9, 2019, 3:22 AM

#

I'm doing PlayerController > RPCServer > Cast to GameMode > Trigger event in GameMode that gets all PlayerControllers and ForEach Loops to trigger an event within each that replicates to Owning Client and does something. Sound right?

grand kestrel Mar 9, 2019, 3:28 AM

#

Not really... use multicast

#

Frankly your whole setup is weird

#

Just do server RPC from your player controller -> net multicast without going to game mode, and this should only be done for input events that everyone needs to know about, since I have no idea what you're actually doing can't say

#

What is it you're sending to the server from the player controller

tribal solstice Mar 9, 2019, 3:40 AM

#

Thanks for the reply - so a player selects a chatroom from a dropdown list within a widget. The selected name is set in the PlayerState as 'CurrentChatroom' to organize players into chatrooms. I have that working, but I'm trying to get it so within the chatroom, there is a list of players that updates for everyone in the chatroom whenever someone enters or leaves. Does that make any sense?

#

Here's what I'm executing on the PlayerController to update the list of players in the chatroom:

#

📎 playerlist.JPG

#

The idea being when a player enters the chatroom, this fires and filters through all the PlayerStates to find the ones that are in the same chatroom, then displays their names

grand kestrel Mar 9, 2019, 3:55 AM

#

Seems backwards. The GameState should keep an array of players in the chat room. When a player connects the game state adds them when they disconnect it removes them. On their connect/disconnect methods, override them and send the RPC for other players

tribal solstice Mar 9, 2019, 3:58 AM

#

And then create arrays of players for each chatroom in the GameState?

grand kestrel Mar 9, 2019, 3:59 AM

#

Er, I don't really know your architecture. Player selects a chat room, tells server, server should have some entity representing that chat room, store it there

#

Also don't use GetAllActors_OfAnything_ nodes, those simply don't scale and are entirely unnecessary no matter what you make. The game mode already has an array of every player state

tribal solstice Mar 9, 2019, 4:01 AM

#

Copy that. Thanks for the info, Vaei

#

That does make sense

severe widget Mar 9, 2019, 4:05 AM

#

Vaei's got a step in the right direction for you, but if you make your chatrooms themselves a sort of state/info actor, you can then have any given player aware of their current chatroom state - which is the actual object with the array of others.

In practice, the gamestate is the framework actor that manages this, but you can get really fancy with the system if you want

#

going so far as to have custom relevancy =D

#

that just prevents you from also having a replicated chatroom ID or having to figure out which chatroom you're in

grand kestrel Mar 9, 2019, 4:07 AM

#

Listen to this guy ^ I have never made a chatroom

severe widget Mar 9, 2019, 4:08 AM

#

tbh I'd just do a socket server for a chat thing

#

You coud do IRC or something too

#

If you were going to do a filtered game-only chat, the messages can be assigned a channel ID and there might not be a point showing who is "in" a "chatroom"

tribal solstice Mar 9, 2019, 4:12 AM

#

Thanks @severe widget! Trying to follow here...when you say make the chatrooms themselves a state/info actor do you mean like a Struct?

#

And just so you have a better idea of my goal, the chatrooms are part of a fake OS within the game. So it's like you're 'online' on a terminal within the game with other people who are online. A bit meta and maybe hard to understand.

severe widget Mar 9, 2019, 4:13 AM

#

Ooooo

tribal solstice Mar 9, 2019, 4:13 AM

#

No way anyone could have known that, haha

severe widget Mar 9, 2019, 4:13 AM

#

You'd be best friends with another user here

tribal solstice Mar 9, 2019, 4:13 AM

#

Shoulda been more specific, sorry

#

Who's that?

severe widget Mar 9, 2019, 4:14 AM

#

He's making a linux hack sim

tribal solstice Mar 9, 2019, 4:14 AM

#

Oh awesome

severe widget Mar 9, 2019, 4:14 AM

#

ServerLadouceur

#

Anyway

tribal solstice Mar 9, 2019, 4:14 AM

#

I'll add that as a note, thank you

severe widget Mar 9, 2019, 4:15 AM

#

Nah I'm talking about like a GameState or a PlayerState.

#

You can make your own thing, we'll say ChatroomState :P

tribal solstice Mar 9, 2019, 4:15 AM

#

I thought the game could only have one GameState object

severe widget Mar 9, 2019, 4:15 AM

#

like

#

as in similar

#

not the vocal tick

tribal solstice Mar 9, 2019, 4:16 AM

#

Ah

#

What exactly would an object like those be? Sorry if I'm not quite following. Do you mean in C?

#

Unfortunately I only know blueprints for now

severe widget Mar 9, 2019, 4:17 AM

#

You're going to quickly run into an issue if want players to be able to all connect to a given channel

#

Every player in the world, that is

#

IDK - do peple join a game and then that's an instance of your game?

tribal solstice Mar 9, 2019, 4:18 AM

#

The user starts the fake OS, it connects to Steam in the background without telling them. Then when they open a certain app to connect to the internet, they are assigned a screenname and can go into chatrooms.

#

But the actual network connection happens as soon as the game is opened, at the moment.

#

I imagine it's better to have them actually connect during the 'internet' part, but that requires me to do a Open Level and I don't want their OS widget and screen to be wiped. Does that make any sense at all? I know it sounds insane... hah

#

The idea is to have it constantly running on a dedicated server eventually

grand kestrel Mar 9, 2019, 4:21 AM

#

Probably want to have an actual chat server and use the udp/tcp socket stuff in UE4 to send the info in/out

tribal solstice Mar 9, 2019, 4:21 AM

#

Had no idea you could do that!

grand kestrel Mar 9, 2019, 4:21 AM

#

Been so long since I looked at it

tribal solstice Mar 9, 2019, 4:21 AM

#

That sounds awesome

grand kestrel Mar 9, 2019, 4:21 AM

#

But I have sent stuff between different UE4 servers so you can definitely do it

tribal solstice Mar 9, 2019, 4:22 AM

#

Is it fast?

grand kestrel Mar 9, 2019, 4:22 AM

#

Yes

#

UE4 has built in types

#

Just trying to remember them for you

tribal solstice Mar 9, 2019, 4:22 AM

#

That's amazing. Think I could swing that in blueprints?

severe widget Mar 9, 2019, 4:23 AM

#

you could wrap the C++ stuff so you can use it from BP

#

that's a common work flow

grand kestrel Mar 9, 2019, 4:23 AM

#

FCLSocket

#

And thats a hard no

#

Need to do a C++ wrapper

tribal solstice Mar 9, 2019, 4:24 AM

#

I'd love to learn, not sure where to start with that though.

severe widget Mar 9, 2019, 4:24 AM

#

It'd depend on whether they should be able to find anybody in the entire world, or whether it was an instanced world

grand kestrel Mar 9, 2019, 4:24 AM

#

Google around for examples of sending/receiving TCP/UDP data with FCLSocket and Avoid anything with Rama's name he does it very wrong but he has examples (do not use)

tribal solstice Mar 9, 2019, 4:24 AM

#

I mean... entire world would be amazing

#

I will, thanks so much

severe widget Mar 9, 2019, 4:24 AM

#

Really, it seems like different "websites" would just be different IRC channels

tribal solstice Mar 9, 2019, 4:25 AM

#

So I could be running a constant IRC and then players would send and receive info from that?

severe widget Mar 9, 2019, 4:25 AM

#

If you're going to be using anything from Rama, use it as a source of keywords that you yourself investigate

tribal solstice Mar 9, 2019, 4:25 AM

#

Copy that

#

Are you guys both talking about IRC or was your method using something else, @grand kestrel ?

severe widget Mar 9, 2019, 4:26 AM

#

hehe // BlueprintType is essential

grand kestrel Mar 9, 2019, 4:26 AM

#

Thats universal but in this case I know he has a wiki entry on it that is very very incorrect

#

My method was for anything that you send in/out over tcp/udp

#

Its for nothing specific at all

severe widget Mar 9, 2019, 4:27 AM

#

His is lower level IIRC

grand kestrel Mar 9, 2019, 4:27 AM

#

Yup

severe widget Mar 9, 2019, 4:27 AM

#

raw packets, right?

tribal solstice Mar 9, 2019, 4:27 AM

#

Oh that's really cool as well.

#

I'd like to experiment with that regardless

grand kestrel Mar 9, 2019, 4:28 AM

#

Oh I gave you the wrong class

#

FCLSocket was my wrapper, its just FSocket*

tribal solstice Mar 9, 2019, 4:28 AM

#

Copy that

grand kestrel Mar 9, 2019, 4:28 AM

#

I have wrappers for the socket, the sender, and the receiver

tribal solstice Mar 9, 2019, 4:29 AM

#

So IRC - would that require me to setup my own IRC server ideally?

#

Or is that far too advanced? Probably easier to just join a network and make channels?

severe widget Mar 9, 2019, 4:32 AM

#

you'd probably be able to start out that way

#

later on you'd want to host it yourself

tribal solstice Mar 9, 2019, 4:33 AM

#

And then just change server data when/if I setup my own IRC?

severe widget Mar 9, 2019, 4:33 AM

#

yeah

tribal solstice Mar 9, 2019, 4:33 AM

#

Cool

#

@severe widget Should I just google what @grand kestrel said if I'm going to go with IRC?

severe widget Mar 9, 2019, 4:36 AM

#

feel free to google anything either of us have said

#

you'll want to understand it before using it either way.

#

if you find sockets easier, do sockets.

tribal solstice Mar 9, 2019, 4:37 AM

#

Looks like there are some plugins in marketplace as well

#

Just to clarify - @grand kestrel is saying I could use TCP/IP Sockets, but what would key difference be with using IRC?

severe widget Mar 9, 2019, 4:42 AM

#

IRC is higher level, its "on top" of sockets

#

Just look at example usage code, really

grand kestrel Mar 9, 2019, 4:43 AM

#

With sockets you literally just have a way to send arbitrary data in/out

#

That's it

severe widget Mar 9, 2019, 4:43 AM

#

^

grand kestrel Mar 9, 2019, 4:43 AM

#

What you send in/out is up to you

tribal solstice Mar 9, 2019, 4:43 AM

#

And IRC is adding a level of security over that?

grand kestrel Mar 9, 2019, 4:43 AM

#

Features

tribal solstice Mar 9, 2019, 4:43 AM

#

I see

grand kestrel Mar 9, 2019, 4:43 AM

#

IRC is a full featured chat

severe widget Mar 9, 2019, 4:43 AM

#

not security

tribal solstice Mar 9, 2019, 4:43 AM

#

That makes sense

grand kestrel Mar 9, 2019, 4:43 AM

#

You could probably use sockets to get stuff in/out of IRC

tribal solstice Mar 9, 2019, 4:43 AM

#

so channels and whatnot

severe widget Mar 9, 2019, 4:44 AM

#

ye

tribal solstice Mar 9, 2019, 4:44 AM

#

Goooot it. Awesome.

severe widget Mar 9, 2019, 4:44 AM

#

Gl though

grand kestrel Mar 9, 2019, 4:44 AM

#

Yeah its gonna be involved

severe widget Mar 9, 2019, 4:44 AM

#

you'll learn quite a bit

tribal solstice Mar 9, 2019, 4:44 AM

#

It sounds fun to be honest, I love this kind of stuff. Happy to learn

#

Really appreciate your help, guys

#

This looks interesting: https://forums.unrealengine.com/community/community-content-tools-and-tutorials/112836-socketer-free-tcp-socket-blueprint-plugin

Unreal Engine Forums

UPDATE 3: An Unreal Engine 4.21 update has been released! Find it's source code, installation instructions, and built windows binaries here: https://github.com/How2C

grand kestrel Mar 9, 2019, 4:56 AM

#

There should be a lot of similar plugins around

#

Seems reasonably weak though, only works on windows and no udp

tribal solstice Mar 9, 2019, 5:08 AM

#

How's this one look? https://www.unrealengine.com/marketplace/en-US/simple-udp-tcp-socket-server

#

No Mac either though... just iOS

misty stirrup Mar 9, 2019, 5:53 AM

#

https://issues.unrealengine.com/issue/UE-18622

#

does anyone have a solid work around for this?

#

i was thinking about making the call multicast, but im not sure how that will affect newly connected players?

#

i just realize this explains a ton of dumb workaround stuff i had to do involving making items not interact with players oh my god

rapid crane Mar 9, 2019, 5:59 AM

#

Hello, suppose I initiated a connection to a server using the open level command, all is fine and I get a message back saying:

LogNet: UPendingNetGame::SendInitialJoin: Sending hello. [UNetConnection] RemoteAddr: X.X.X.X:7777, Name: IpConnection_0, Driver: PendingNetDriver IpNetDriver_0, IsServer: NO, PC: NULL, Owner: NULL, UniqueId: INVALID

How do I later retrieve the RemoteAddr: X.X.X.X:7777 in say my playercontroller?

#

If I try this in the player controller:

return NetDriver->ServerConnection->LowLevelGetRemoteAddress(true);

I still get "127.0.0.1" back as host address which is clearly wrong. I can verify I am connected to actual remote host.

cerulean acorn Mar 9, 2019, 7:54 AM

#

Hi. A question on OpenLevel with a dedicated server. I've set a maximum number of clients that I check in my GameMode's PreLogin(), returning a non-empty error string if I reached the maximum number of players. So the client connects to the server on BeginPlay() , but if it fails because of Max Players, it spams the server continuously which returns the same error over and over. I can trap OnNetworkFailure() on my GameInstance, but doesn't do anything unless I explicitly call RequestExit() or exit(0) to make it quit. Any way of stopping it to loop this way ?

lost inlet Mar 9, 2019, 12:41 PM

#

yes as that's the default behaviour

pallid mesa Mar 9, 2019, 12:46 PM

#

well, these five lines don't say so ```
[2019.03.09-12.46.28:280][ 0]LogOnline: STEAM: [AppId: 0] Game Server API initialized 0
[2019.03.09-12.46.28:280][ 0]LogOnline: Warning: STEAM: Failed to initialize Steam, this could be due to a Steam server and client running on the same machine. Try running with -NOSTEAM on the cmdline to disable.
[2019.03.09-12.46.28:281][ 0]LogOnline: Display: STEAM: OnlineSubsystemSteam::Shutdown()
[2019.03.09-12.46.28:281][ 0]LogOnline: Warning: STEAM: Steam API failed to initialize!
[2019.03.09-12.46.28:282][ 0]LogOnline: Display: STEAM: OnlineSubsystemSteam::Shutdown()

#

I might be missing a dll or a step

#

because it only works when steam is running on the background (even unlogged)

#

I've tried to place the steam_appid.txt on the binaries folder, but it erases it when steam is not running

meager spade Mar 9, 2019, 12:59 PM

#

error C2275: 'UAresPlayerAnimationController': illegal use of this type as an expression

#

DOREPLIFETIME_CONDITION(UAresPlayerAnimationController, MovementInput, COND_SkipOwner);

#

oh nbm

#

missing UnrealNetwork.h

solar stirrup Mar 9, 2019, 1:24 PM

#

Hey everyone

#

What would be the best way to synchronize a player's inventory client and server side?

cerulean acorn Mar 9, 2019, 1:44 PM

#

@solar stirrup I guess you are talking about replication. Your character has variables that can be modified on the server-side which is then "replicated" back to the client.

solar stirrup Mar 9, 2019, 1:44 PM

#

I meant synchronize, aka make sure both have the same inventory

#

I mean my plan rn is to have RPCs for adding and removing an item from the inventory

#

but then i'd also have to serialize the state of the item (health, ammo left in weapon for example)

meager spade Mar 9, 2019, 1:46 PM

#

use some sort of Attribute Struct

#

which contains the item status

#

and replicate that

solar stirrup Mar 9, 2019, 1:46 PM

#

kk

#

isn't that a bit expensive bandwidth wise?

meager spade Mar 9, 2019, 1:47 PM

#

depends, use an FastArraySerializer

#

and replicate only what changes

solar stirrup Mar 9, 2019, 1:47 PM

#

👌

cerulean acorn Mar 9, 2019, 2:26 PM

#

Hmmm. I'll answer the question I asked earlier this morning: Don`t put OpenLevel() on BeginPLay() or else, a PreLogin() failure will cause you client to re-connect endlessly.

#

Deferring my connection request with some action prevented that.

ruby furnace Mar 9, 2019, 3:13 PM

#

Anyone here got dedicated servers on linux running for a steam project?

hoary spear Mar 9, 2019, 3:19 PM

#

To keep inventory integrity in multiplayer, shouldnt the server hold the inventories?

ruby furnace Mar 9, 2019, 3:20 PM

#

yes, otherwise the players can cheat and add things to the inventory?

hoary spear Mar 9, 2019, 3:21 PM

#

its just a regular game at the end of the day tho,

#

in this specific instance your playing together up to 4 ppl,

#

and im not sure if its worth the effort to care if some of them would cheat or not

#

no competitive play or anything. just a 4 player rpg 😛

ruby furnace Mar 9, 2019, 3:21 PM

#

not sure what a regular game is

#

but if you don't think it's worth it, don't do it

hoary spear Mar 9, 2019, 3:22 PM

#

makes sense 😛

tribal solstice Mar 9, 2019, 9:29 PM

#

hey ya'll. I'm sending a server RPC from my PlayerController, which then activates a multicast RPC but for some reason it's only triggering on the server

#

📎 pc1.JPG

#

that should work yeah?

jolly siren Mar 9, 2019, 9:47 PM

#

Are you expecting it to execute on all clients or only the owning client?

#

@tribal solstice

tribal solstice Mar 9, 2019, 10:00 PM

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@jolly siren All clients

rotund sapphire Mar 9, 2019, 10:03 PM

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PC exists on server, and owning client only, so this wont execute on all clients ever.

meager spade Mar 9, 2019, 10:04 PM

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you want to use GameState or some other actor that is readily available on all clients

tribal solstice Mar 9, 2019, 10:07 PM

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Ah of course. Sorry guys, still wrapping my head around replication.

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So cast to GameState and have that execute a multicast to PCs?

rotund sapphire Mar 9, 2019, 10:10 PM

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Calling RPCs are very expensive networking operation, if you can design your idea around replicated variables you're better to use them as much as possible. Depending on the purpose of this RPC call of course.

meager spade Mar 9, 2019, 10:11 PM

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well RPC's are used where replicated variables cant be used

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i re-wrote most of my systems to use OnRep's as much as possible

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where previously i was using RPC's but you still need to rpc the server from client if you want a property replicated to all

rotund sapphire Mar 9, 2019, 10:12 PM

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Yes. OnRep Notify is one example that can be used to fire events, but doesnt suffer the overhead of RPCs.

tribal solstice Mar 9, 2019, 10:13 PM

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I'll look into OnRep Notify

meager spade Mar 9, 2019, 10:13 PM

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this is what i had before void UAresPawnControllerComponent::MulticastSetAiming_Implementation(bool bInAiming) { if (!IsLocallyControlled()) { bAiming = bInAiming; OnAimingChanged(); } }