#multiplayer | Unreal Source | Page 580

royal rampart Oct 20, 2020, 8:59 AM

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but AGameState is a serverthing right? that still won't confirm that the player is loaded fully for the clients right?

winged badger Oct 20, 2020, 8:59 AM

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on its BeginPlay it will register with the GameState using those 2 functions

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GS is not a server thing, its replicated

royal rampart Oct 20, 2020, 9:00 AM

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oke oke

winged badger Oct 20, 2020, 9:00 AM

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after the PS actors from other players have replicated, and call BeginPlay

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they add themselves to the GS->PlayerArray

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its the most reliable hook for what you're trying to do

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as long as you're using GameMode/GameState, without the Base part

royal rampart Oct 20, 2020, 9:01 AM

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but my approach was that in the beginplay, the client tells the server in gamemode hey im new, give everyone my name

winged badger Oct 20, 2020, 9:02 AM

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it comes with a guarantee that GameState will have replicated by the time any Actor on client calls BeginPlay

royal rampart Oct 20, 2020, 9:02 AM

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but when the other clients try to set his name, that player isnt in their game fully yet

winged badger Oct 20, 2020, 9:02 AM

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eh

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this will help you find the PS, which has a name

royal rampart Oct 20, 2020, 9:02 AM

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ooooh wait, dude, i think i know why it isnt working haha

winged badger Oct 20, 2020, 9:03 AM

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but when it replicates, the new name typically wouldn't had had a chance to replicate as well

royal rampart Oct 20, 2020, 9:03 AM

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im gonna try something, thanks in advance for your help 🙂

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ill prob be back soon lol

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haha

winged badger Oct 20, 2020, 9:03 AM

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OnRep_PlayerName,

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use it to notify clients that already found the PS that the name changed

royal rampart Oct 20, 2020, 9:04 AM

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okay okay perfect

meager fable Oct 20, 2020, 9:11 AM

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Still couldn't find the anwser to that rotation problem so I made it a question on AnwserHub, if anyone has an idea what happens hit me up

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https://answers.unrealengine.com/questions/990916/netmulticast-function-doesnt-always-execute-when-c.html

twin juniper Oct 20, 2020, 9:56 AM

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In the game world/level what is responsible for spawning the players onto the level/field.

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It's not the players themselves, correct? It's something that belongs to the server ?

bitter oriole Oct 20, 2020, 9:57 AM

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Game mode

twin juniper Oct 20, 2020, 9:57 AM

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Ah okay.

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IS there any tutorial on this for either cpp/blue print?

bitter oriole Oct 20, 2020, 9:59 AM

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Not really, people usually just roll with it using player starts

twin juniper Oct 20, 2020, 9:59 AM

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So every game mode has a default player which it sets onto the field?

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Because what I don't want (dedicated server perspective) is for IsRole Authority to return true on the player.

bitter oriole Oct 20, 2020, 10:00 AM

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That doesn't make a lot of sense

twin juniper Oct 20, 2020, 10:00 AM

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ROLE_AUTHORITY should only return true for the server correct?

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not for the clients?

bitter oriole Oct 20, 2020, 10:01 AM

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Or a single-player game, or a client-only actor on client

twin juniper Oct 20, 2020, 10:01 AM

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Yes but not on a dedicated server with multiple players.

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Or a listen server where the client isn't the host.

bitter oriole Oct 20, 2020, 10:02 AM

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Unless the actor is client-only, spawned on client and not replicated

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In which case it's also authority, obviously

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Still not sure what you're asking

twin juniper Oct 20, 2020, 10:03 AM

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Let's say in the case of a listen server, each player gets their actor spawned into the level.
If some server sided code is called within the actor class, what I would want is ROLE_AUTHORITY to only return true on the listen server actor not the connected client actors.

bitter oriole Oct 20, 2020, 10:03 AM

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That still doesn't make sense

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The server will always have authority

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That's how the engine works

twin juniper Oct 20, 2020, 10:03 AM

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Yes the server will have authority but not the connected clients to the server..

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Because they're not the server

bitter oriole Oct 20, 2020, 10:04 AM

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ROLE_Authority means : this actor is the server version of this actor

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Basically

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It's just an information for your code to use

twin juniper Oct 20, 2020, 10:04 AM

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So if a listen server calls ROLE_Authority in their actor class it should return true yes?

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But if a connected client checks ROLE_Authority in their actor class,

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It should return false

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Or am I misunderstanding?

bitter oriole Oct 20, 2020, 10:05 AM

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All actors on the server will have ROLE_Authority, replicated actors on a client will have another role

twin juniper Oct 20, 2020, 10:06 AM

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Yes I get that part but from the connecting client, if their actor class checks ROLE_Authority it should not return true

bitter oriole Oct 20, 2020, 10:06 AM

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"Replicated actors on a client will have another role"

twin juniper Oct 20, 2020, 10:07 AM

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I'm misunderstanding something. Is the actor's class code running both on the server and the client?

bitter oriole Oct 20, 2020, 10:07 AM

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Of course

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If it's replicated, I mean

twin juniper Oct 20, 2020, 10:07 AM

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So in that case ROLE_Authority checks would always pass

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since an instance of it is running on the server as well

bitter oriole Oct 20, 2020, 10:07 AM

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On the server

twin juniper Oct 20, 2020, 10:07 AM

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Correct

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not on the client

bitter oriole Oct 20, 2020, 10:07 AM

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On the client, it would have another role

twin juniper Oct 20, 2020, 10:08 AM

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Ah okay,

bitter oriole Oct 20, 2020, 10:08 AM

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Like I said

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All actors on the server will have ROLE_Authority, replicated actors on a client will have another role

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GetLocalRole() on the server will always return ROLE_Authority

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On any actor

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AFAIK

twin juniper Oct 20, 2020, 10:08 AM

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I think you are correct

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So what I'm concerned about I Guess is,

bitter oriole Oct 20, 2020, 10:09 AM

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GetLocalRole() on the same actor, on the client, will return ROLE_SimulatedProxy or ROLE_AutonomousProxy, depending on the actor ; if it's replicated

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If it's not replicated it will also return ROLE_Authority

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(But then it's just not the same actor as the server)

twin juniper Oct 20, 2020, 10:09 AM

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But if you want that actor visible across all connected clients.

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Then it should be replciated.

bitter oriole Oct 20, 2020, 10:09 AM

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Yes

twin juniper Oct 20, 2020, 10:10 AM

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Okay that part makes sense so far.

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So is it valid to place ROLE_Authority checks and server sided code in the actor class?

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Or should it be done somewhere else?

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Since the clients are also running the actor class.

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Whether it's a listen server or dedicated server.

bitter oriole Oct 20, 2020, 10:11 AM

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When you want to know whether a replicated actor is running on server, check if GetLocalRole() returns ROLE_Authority

twin juniper Oct 20, 2020, 10:12 AM

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And if it returns true is it okay to insert server sided checks there?

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From a listen server perspective.

bitter oriole Oct 20, 2020, 10:12 AM

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If it returns ROLE_Authority, then you are running on the server

twin juniper Oct 20, 2020, 10:12 AM

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What I mean by server sided checks is,

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Checks dealing with game code,

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Verifiying game code.

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Algorithms, etc.

bitter oriole Oct 20, 2020, 10:13 AM

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I can't tell you how your game code should run, I'm just answering the question

twin juniper Oct 20, 2020, 10:13 AM

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THat's fine.

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I'm just trying to get a better understandin g

bitter oriole Oct 20, 2020, 10:13 AM

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Local role == ROLE_Authority + replicated = running on server

twin juniper Oct 20, 2020, 10:13 AM

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Of how the internal code works.

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Let's say from a dedicated server perspective, GetLocalRole() should not return ROLE_Authority on the client actor class

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Correct?

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Only on the server's actor class

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So there's no real difference,

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Between listen server and dedicaated server

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In terms of role authority checking.

bitter oriole Oct 20, 2020, 10:15 AM

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Listen and dedicated change indeed nothing at all

twin juniper Oct 20, 2020, 10:15 AM

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Ah okay.

bitter oriole Oct 20, 2020, 10:15 AM

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But like I said

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GetLocalRole(), on the server, will always return ROLE_Authority on all actors

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No matter if they're a remote client's pawn or something

twin juniper Oct 20, 2020, 10:16 AM

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So let's say I have this scenario. If you could help me understand it better.

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One player is connected to a dedicated server. The player's actor class calls GetLocalRole() and checks ROLE_Authority, if that check pass an object spawns onto the map.

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In that case only one object should be spawned onto the map.

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Not two.

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Since the connecting client's version failed the check.

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But the one replicated on the server passed the check.

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Correct?

bitter oriole Oct 20, 2020, 10:17 AM

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The client version is the replicated one. The authoritative version is on the server.

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But yeah

twin juniper Oct 20, 2020, 10:18 AM

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Okay so if no check is being done and the actor spawns an object. Does that mean the client is now seeing two objects? One they spawned and one the server spawned?

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Even though only one is being replicated?

bitter oriole Oct 20, 2020, 10:18 AM

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Depends if the object spawned is replicated

twin juniper Oct 20, 2020, 10:18 AM

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Assuming that object is replicated.

bitter oriole Oct 20, 2020, 10:19 AM

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Then the client would see two

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The server one

twin juniper Oct 20, 2020, 10:19 AM

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Ah yes okay, I'm understanding it now.

rich ridge Oct 20, 2020, 10:19 AM

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Depends if the object spawned is replicated
@bitter oriole even though actor is not set to replicate, if client is spawning it he will see it for sure.

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And rest of the clients won't see client spawned actors

twin juniper Oct 20, 2020, 10:20 AM

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Thank you that helped me understand a lot

bitter oriole Oct 20, 2020, 10:20 AM

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He asked if the player would see two objects

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The answer is,

Depends if the object spawned is replicated

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🤷

rich ridge Oct 20, 2020, 10:21 AM

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Client will be able to see object regardless of replication if he spawn the object

bitter oriole Oct 20, 2020, 10:21 AM

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That's not the question

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He asked if he would see TWO objects

twin juniper Oct 20, 2020, 10:21 AM

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Now another question I have I suppose is, shoud game rules be handled in the level/instance/game mode or can game rules also be dealt with

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In the replciated actor class?

rich ridge Oct 20, 2020, 10:21 AM

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Ohk

bitter oriole Oct 20, 2020, 10:22 AM

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Depends what kind of game rules.

twin juniper Oct 20, 2020, 10:22 AM

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Like let's say a player's health reaches 0

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Who decides

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that player dies

rich ridge Oct 20, 2020, 10:22 AM

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GameMode

bitter oriole Oct 20, 2020, 10:22 AM

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Depends on the game. The server does, but maybe the client does too.

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It's not a binary question

twin juniper Oct 20, 2020, 10:22 AM

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I know the server does,

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I just mean,

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Which part of the server and LAST_DEVIL said gamemode

bitter oriole Oct 20, 2020, 10:23 AM

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Do you want players to die 200ms after you fired a headshot ?

twin juniper Oct 20, 2020, 10:23 AM

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No

bitter oriole Oct 20, 2020, 10:23 AM

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Then it's clearly not the game mode alone.

twin juniper Oct 20, 2020, 10:23 AM

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So the actor should also kill the player locally on the client

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But then the gamemode

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should do the final

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actual kill?

bitter oriole Oct 20, 2020, 10:23 AM

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It depends on the game and you will have to make such calls

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No matter what happens, other players will see what the server tells them

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GameMode or not

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But the firing player may want to see something before the server tells him

twin juniper Oct 20, 2020, 10:25 AM

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So let's say, the player's health hits zero and I do this inside the actor class

if(GetLocalRole()==Role_AUTHORITY){
 PlayDeathAnimation();
 Die();
}

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Very simply.

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Is that valid?

bitter oriole Oct 20, 2020, 10:25 AM

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It is, and it will also fail to play any animation on clients

twin juniper Oct 20, 2020, 10:26 AM

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So maynbe I can change it to this.

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if(GetLocalRole()==Role_AUTHORITY){
 if(health==0){
  isdead = true;
  die();
}
}

if(isdead){
 PlayDeathAnimation();
}

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Something like that

bitter oriole Oct 20, 2020, 10:27 AM

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Provided IsDead is replicated, then it will work

twin juniper Oct 20, 2020, 10:27 AM

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Yes

bitter oriole Oct 20, 2020, 10:27 AM

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of course it will also happen 200ms too late

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For the shooter

twin juniper Oct 20, 2020, 10:27 AM

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Ah.

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Okay.

bitter oriole Oct 20, 2020, 10:28 AM

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(Probably more like 50ms in this day and age, but still)

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The point I'm making is, it depends on your game

twin juniper Oct 20, 2020, 10:28 AM

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Got it!

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If my game isn't time sensitive,

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Then that code is fine.

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If it is time sensitive.

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Then it needs adjustments.

bitter oriole Oct 20, 2020, 10:29 AM

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It's probably fine most of the time really, you probably don't want a bad replication timing to trigger a death animation when the player isn't actually dead

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Same way Valorant plays firing effects instantly, but only shows damage effects when the server confirms hits

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What I'm saying is, you need to decide how lag works in your game

twin juniper Oct 20, 2020, 10:30 AM

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I think I understand.

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Thank you!

rich ridge Oct 20, 2020, 10:32 AM

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@twin juniper if you aren't using GAS, what you can do , do RPC from server to client.. that player is supposed to die
And when player receive that RPC...
It plays dead animation..

twin juniper Oct 20, 2020, 10:33 AM

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That's also doable yes.

rich ridge Oct 20, 2020, 10:33 AM

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And bind a notify event on last frame of dead animation to actually destroy the actor

twin juniper Oct 20, 2020, 10:34 AM

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If the RPC is being called from client to be executed on the server, the client must own the Actor that the RPC is being called on.```

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Doesn't that mean that only the one client will see the death animation.

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And not the other clients?

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Or should the rpc be done to every client with the actor id.

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To display the death animation.

meager fable Oct 20, 2020, 10:35 AM

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    void GetLifetimeReplicatedProps( TArray< FLifetimeProperty > & OutLifetimeProps ) const;
    UPROPERTY(Replicated)
    bool bIsAttacking = false;

void ABaseCharacter::GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const
{
    DOREPLIFETIME(ABaseCharacter, bIsAttacking);
}

When i set my variable to be replicated like this it disables my pawns movement, is that the correct way to set replication?

empty axle Oct 20, 2020, 10:35 AM

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You would need to call rpc for every player. I think it is better to go with bool approach though

twin juniper Oct 20, 2020, 10:35 AM

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Okay, thank you.

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I'll experiment with both

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and see which give sbetter results.

empty axle Oct 20, 2020, 10:36 AM

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Sure, just keep in mind that someone might join after the death. If that is possible in your game at all

twin juniper Oct 20, 2020, 10:37 AM

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Ah okay, I'll definitely keep that in mind.

rich ridge Oct 20, 2020, 10:37 AM

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Have you tried GAS?

twin juniper Oct 20, 2020, 10:38 AM

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I haven't.

rich ridge Oct 20, 2020, 10:38 AM

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Please have a look, fortnite uses GAS.

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All the actors which is damage able is coupled to gas in fortnite

twin juniper Oct 20, 2020, 10:39 AM

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https://docs.unrealengine.com/en-US/Gameplay/GameplayAbilitySystem/index.html this?

Gameplay Ability System

High-level view of the Gameplay Ability System

rich ridge Oct 20, 2020, 10:39 AM

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Yes correct

twin juniper Oct 20, 2020, 10:39 AM

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Okay I"ll take a look at it.

rich ridge Oct 20, 2020, 10:40 AM

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Detailed break down can be found here

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https://github.com/tranek/GASDocumentation

GitHub

tranek/GASDocumentation

My understanding of Unreal Engine 4's GameplayAbilitySystem plugin with a simple multiplayer sample project. - tranek/GASDocumentation

twin juniper Oct 20, 2020, 10:40 AM

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Oh thank you

rich ridge Oct 20, 2020, 10:40 AM

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There is a dedicated channel for GAS on discord

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You can also ask there

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#gameplay-ability-system

twin juniper Oct 20, 2020, 10:41 AM

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Cool!

quasi kite Oct 20, 2020, 11:45 AM

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Does OnRep only work for certain types?
I have two OnReps, one for a USkeletalMesh* and another for FTransform that gets changed after each other in the same function.
The USkeletalMesh replicates for both server and client, but the FTransform doesn't replicate for either despite getting assigned a new value.

daring igloo Oct 20, 2020, 11:48 AM

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Is it possible to call RPC on the server and pass APawn* as parameter and hope that it will be same Pawn on server?

empty axle Oct 20, 2020, 12:01 PM

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@daring igloo you can pass actors as a parameters in RPCs as long as the actor is replicating

daring igloo Oct 20, 2020, 12:22 PM

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@empty axle thanks

rose egret Oct 20, 2020, 12:27 PM

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how you guys simulate weapon fire in remote clients in A FPS game. I have both short and long range weapons.
do you replicate the trace direction or you just use the location and direction of muzzle ?

empty axle Oct 20, 2020, 12:34 PM

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@rose egret I would say timestamp would also be pretty useful and personally I would go with current location and direction of muzzle.

gloomy tiger Oct 20, 2020, 12:57 PM

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how you guys simulate weapon fire in remote clients in A FPS game. I have both short and long range weapons.
do you replicate the trace direction or you just use the location and direction of muzzle ?
@rose egret Watch out. Here you have to be cautious with what you transport over the network to avoid unnecessary lags. I wouldn't replicate both.

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Perhaps I misunderstood what the second option was, but as long as you have the location and direction of the muzzle in all your clients, all I'd do would be broadcasting a Fire message to all your other clients, alongside the Player's (the one who shot) ID. When this information arrive at client-level, then I'd use it to perform the actual Fire action on each/every client.

solar ivy Oct 20, 2020, 1:30 PM

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I'm building some functionality based on server time. But I noticed when my server runs for quite some time I'm starting to get issues with syncing time. To test this I'm sending RPC with local GameState->GetServerWorldTimeSeconds then checking the difference between this value and the result of the same function call on the server and sending back the result. So if at the beginning the difference is around 120ms and stable but after my server is up for around 12 hours the result becomes very unstable and can vary from 200ms to 1000ms. What can cause this?

marble gazelle Oct 20, 2020, 1:37 PM

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check the source code, the default impl interplolates the time

royal rampart Oct 20, 2020, 1:50 PM

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small question, all my characters have a nameplate (widgetcomponent) attached to their root, but how do I get that widget to change the text from another character?

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or does it have to be replicated automatically or something, I have been searching for 2 days now 😦

chrome bay Oct 20, 2020, 1:52 PM

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get the player state of the character, get the name from there

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ez

solar ivy Oct 20, 2020, 1:54 PM

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as I understand the interpolation is needed to avoid spikes when replicating time to client. It doesn't explain why the desync grows with time though. am I missing something?@marble gazelle

marble gazelle Oct 20, 2020, 1:55 PM

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\o/ actually I don't know, I removed it since I didn't want it to behave like that you could try to increase the update time and see what happens

twin juniper Oct 20, 2020, 1:55 PM

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Hello , I'm trying to make a voice chat system , but voices can't be heard , I already have this in the DefaultGame file :

[/Script/Engine.GameSession]
bRequiresPushToTalk=true
``` ant this in the DefaultEngine file :

```ini
[Voice] 
bEnabled=true

[OnlineSubsystem] 
bHasVoiceEnabled=true

and there is my player controller code and the sessions system :

📎 unknown.png

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📎 unknown.png

gloomy tiger Oct 20, 2020, 1:57 PM

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as I understand the interpolation is needed to avoid spikes when replicating time to client. It doesn't explain why the desync grows with time though. am I missing something?@marble gazelle
@solar ivy If your response time is scaling, then:

The packet being transmitted has grown;
The operation (on the server-side) to prepare the data that will be sent to the client requires more time to process.

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This is probably not the specific answer to your question, but I'd start from there.

chrome bay Oct 20, 2020, 1:57 PM

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floating point precision breaks down over time

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The longer the server is running, the less accurate it'll be

gloomy tiger Oct 20, 2020, 1:58 PM

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The longer the server is running, the less accurate it'll be
@chrome bay That, too.

chrome bay Oct 20, 2020, 1:58 PM

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2-4 hours is usually beyond the point of acceptable IMO

gloomy tiger Oct 20, 2020, 1:59 PM

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I'm building some functionality based on server time. But I noticed when my server runs for quite some time I'm starting to get issues with syncing time. To test this I'm sending RPC with local GameState->GetServerWorldTimeSeconds then checking the difference between this value and the result of the same function call on the server and sending back the result. So if at the beginning the difference is around 120ms and stable but after my server is up for around 12 hours the result becomes very unstable and can vary from 200ms to 1000ms. What can cause this?
@solar ivy

One other thing. Garbage collection.

chrome bay Oct 20, 2020, 1:59 PM

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After 12 hours that won't be the only thing that breaks down, character movements timestamping starts to break down not long after that

gloomy tiger Oct 20, 2020, 1:59 PM

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Pretty much, your server might be exhausted.

chrome bay Oct 20, 2020, 2:00 PM

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We reset our world timers during seamless travel which maintains the accuracy, but our matches only last up to 2 hours maximum anyway before the map changes.

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Much more difficult problem to solve if you have servers up for longer than 4-6 hours without any map change

solar ivy Oct 20, 2020, 2:17 PM

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@gloomy tiger the time to receive reply from the server is not the issue. i'm checking that as well and it's around 120 ms which should be just ping related.
@chrome bay the precision might be the issue yeah. however in my case the inconsistency should be some milliseconds not the whole second. unless there are more operations with timestamp that increase it, maybe the mentioned interpolation does.

I'd prefer to keep servers running as long as possible until restart. is it even possible to make servers running for 5-8-10 hours or even more without major changes to the engine source code? or will there be other issues besides time?

gloomy tiger Oct 20, 2020, 2:31 PM

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Is your server a monolith?

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I mean, b/c sometimes you can orchestrate other instances to lift up. I've done that in the past, but my game was based off sessions and not a persistent world.

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But you can pretty much achieve the same results in a persistent world.

chrome bay Oct 20, 2020, 3:04 PM

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GetServerWorldTimeSeconds() is really inconsistent anyway, it's not really useful for accurate timekeeping

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the implementation is far from ideal

marble gazelle Oct 20, 2020, 3:30 PM

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Since we are at this topic, any hints how to properly sync time between server and clients? (I was thinking about syncing a datetime, since int64 my be a bit mor pricise than float) but There still will be some delay due to ping so I'm not quite sure how to sync time properly

kindred widget Oct 20, 2020, 4:06 PM

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@chrome bay Congrats on third place in the steam top seller list by the way!

rose egret Oct 20, 2020, 4:23 PM

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@solar ivy GetServerWorldTimeSeconds() sucks, search UE4 synced clock I guess there was a good medium article about it

solar ivy Oct 20, 2020, 4:34 PM

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I've seen that article yeah. I guess the main issue of Unreal's implementation is that they sync time with a replicated property. I'm guessing this is what's causing my issue as well. The time to replicate that property can be quite long and vary over time especially if number goes higher.

lime raptor Oct 20, 2020, 5:00 PM

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this may be the wrong channel but how can i set up a simple multiplayer system i mean just one server and no more than 10 people

meager fable Oct 20, 2020, 5:41 PM

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@lime raptor
https://www.youtube.com/watch?v=abmzWUWxy1U&list=PLZlv_N0_O1gYqSlbGQVKsRg6fpxWndZqZ
and
https://www.youtube.com/c/brynertoma/videos

YouTube

Unreal Engine

Blueprint Multiplayer: Project Overview | 01 | v4.11 Tutorial Serie...

In this video we take a look at the finished project and step through each of the features that will be covered in this series. We show our functional Main Menu and its options, a lobby where players can chat with one another and select their characters for the game, some serv...

▶ Play video

YouTube

BRY

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might be good places to start

lyric mural Oct 20, 2020, 7:07 PM

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How would I replicate this trace event properly? I've tried a few things but I cant get it to properly get the right actor

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📎 unknown.png

kindred widget Oct 20, 2020, 7:12 PM

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@lyric mural What is the function call for? Usually you don't replicate ui stuff, but replicate variables that can drive ui on other machines. And generally you wouldn't replicate the trace, but trace on that client, use a client owned actor to call a server rpc based on the trace.

lyric mural Oct 20, 2020, 7:19 PM

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The trace has to get the clicked actors ID and then it pulls up their profile. I tried it with nothing, run on client, and server, but every time its returning on the server hosts profile

kindred widget Oct 20, 2020, 7:35 PM

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Not sure what exactly you mean by profile, but if you're using IDs for it, it sounds like something that you'd either have replicated to a client, constructed on the client to begin with and then use the ID to get it locally with no RPCs or server coding at all. Or if it's some form of protected data, rpc to the server, and have the server rpc the owning client's player controller and have that controller open/set the UI data.

golden plinth Oct 20, 2020, 8:02 PM

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Currently trying to display a ui on all players screens, but with my current code, it only does so if the function is called by the player in the main viewport/editor and ran on another player. Any ideas? Here is the code:

📎 unknown.png

gloomy tiger Oct 20, 2020, 8:21 PM

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UMG is client-side only. That means every client have their own instance of a given screen. What you share among players is the data a screen contains. cc @golden plinth

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Also, this is quite wrong IIRC:

📎 unknown.png

empty axle Oct 20, 2020, 8:23 PM

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Yep, on client side you should always get Pc from index 0

gloomy tiger Oct 20, 2020, 8:24 PM

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Player Index IIRC stands only for local players, and not network players.

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In other words...

golden plinth Oct 20, 2020, 8:24 PM

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Got it, thanks for clearing that up for me

gloomy tiger Oct 20, 2020, 8:25 PM

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You'd have to control what players are connected through other way. I usually use GameSession to control which players are connected, and to manage their controllers.

empty axle Oct 20, 2020, 8:25 PM

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@golden plinth make sure you are calling that multicast from the server also.

gloomy tiger Oct 20, 2020, 8:27 PM

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Just for your information on what's going on in your situation: Body Reported is being executed On All. That means even the server executes that piece of code. I'm assuming one of your players is hosting the game (meaning it is the server), and this is the player that sees the screen you reported. The others aren't displaying the given screen because of your GetPlayerController.

golden plinth Oct 20, 2020, 10:39 PM

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@gloomy tiger When I open my GameSession, it takes me to c++ code. Where would I manage what players are connected in blueprints?

harsh lintel Oct 20, 2020, 10:55 PM

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is it possible to get the PlayerState of an AI through the game mode on a client? if so any suggestions as to how to get the right one?

graceful cave Oct 20, 2020, 11:12 PM

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anyone know about a NetChecksumMismatch when connecting to a linux server but not windows?

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the classes in question are cpp classes

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i tried repackaging the client and the server and it still happens

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maybe its time to delete intermediate again

graceful cave Oct 20, 2020, 11:58 PM

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ok for the record the issue was that i still had another terminal open running the previous version of the server

swift kelp Oct 21, 2020, 3:48 AM

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any of you have an issue where you use PIE and you spawn an object client side and nothing will spawn (except for the last client)
so if you have 3 players the 3rd player can spawn but player 1 & 2 can't.
If you launch 4 clients in PIE, only the 4th client can spawn

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if you run standalone game, everyone can spawn a local instance (instead of one for all like in PIE)

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any way around this?

meager fable Oct 21, 2020, 4:17 AM

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do you have net load on client option checked on your actor?

kindred widget Oct 21, 2020, 4:28 AM

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@harsh lintel The only way to do that.. would be to have a chain of functions through different classes. Why does it have to go through GameMode if it's for a client?

harsh lintel Oct 21, 2020, 4:29 AM

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I meant GameState, I think I solved my issue tho

kindred widget Oct 21, 2020, 4:30 AM

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Both Pawn and Controller have a PlayerState values, does AI not populate this like Player pawns?

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If they do, you don't even need the GameState, just the pointer to that AI.

meager fable Oct 21, 2020, 4:40 AM

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is there a way to get the name of the client the function was called on, eg if called on the server that would return "Server" if called on client 1 it would return "Client 1" etc

kindred widget Oct 21, 2020, 4:43 AM

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@meager fable UKismetSystemLibrary's PrintString function shows how to do that. At least as long as it's not a Shipping build.

meager fable Oct 21, 2020, 4:44 AM

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So just use print string instead of log and it will add the name?

kindred widget Oct 21, 2020, 4:45 AM

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Yep. That's one reason I still use that function in C++. Convenient for that.

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Looks like this mostly.

#

📎 unknown.png

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Creates a Prefix string based on the NetMode and adds it to your desired print string.

meager fable Oct 21, 2020, 4:46 AM

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nice, thanks

meager fable Oct 21, 2020, 5:01 AM

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Okay, so I have this function hierarchy:

void ABaseCharacter::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
 {
     Super::SetupPlayerInputComponent(PlayerInputComponent);
     PlayerInputComponent->BindAction(TEXT("Attack"), IE_Pressed, this, &ABaseCharacter::ServerAttack);
 }
 
 void ABaseCharacter::ServerAttack_Implementation()
 {
     MulticastRotateToControllerYaw();
 }
 
 void ABaseCharacter::MulticastRotateToControllerYaw_Implementation()
 {
FRotator PlayerRotation = GetActorRotation();
    FRotator ControllerRotation = GetControlRotation();
    PlayerRotation.Yaw = ControllerRotation.Yaw;
    FString DebugText = TEXT("Called Rotate, control rotation is") + ControllerRotation.ToString();
    UKismetSystemLibrary::PrintString(this, DebugText, false, true,  FLinearColor::Red); 
    SetActorRotation(PlayerRotation);
 }

that produces this output when attacking:

#

📎 unknown.png

#

Attack is called on client 1

#

and from what it looks like it should rotate correctly on client 1 and the server and fail on client 2

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but it rotates correctly on client 2 and the server

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and on client 1 it sometimes rotates and sometimes just stays in place

#

looks totally random

#

anyone has any idea what is happening here?

meager fable Oct 21, 2020, 5:32 AM

#

when i run RotateToControllerYaw on the server instead of multicast it rotates correctly everywhere but never on the client that attacked

lone ice Oct 21, 2020, 5:37 AM

#

Does anyone know if RPC and rep events still work in singleplayer. I don't wanna make different classes for a multiplayer character and singeplayer one. Any insight on this would be appreciated.

meager fable Oct 21, 2020, 5:44 AM

#

@lone ice UE4 docs says that If there is a possibility that your project might need multiplayer features at any time, you should build all of your gameplay with multiplayer in mind from the start of the project. If your team consistently implements the extra steps for creating multiplayer, the process of building gameplay will not be much more time-consuming compared with a single-player game. In the long run, your project will be easier for your team as a whole to debug and service. Meanwhile, any gameplay programmed for multiplayer in Unreal Engine will still work in single-player.

#

so I guess it should work

lone ice Oct 21, 2020, 5:46 AM

#

Thank you very much.

kindred widget Oct 21, 2020, 5:54 AM

#

@lone ice I'm pretty sure it all works exactly the same. Basically you would need to program your game as if you were doing multiplayer to begin with and your singleplayer stuff would literally be a multiplayer game with no connected clients. I'm fairly certain that OnRep functions in blueprint are called when done like this and you have to call them manually on the server in C++ anyhow. And RPCs meant for the server that get called on the server will just run anyhow with no network necessity.

lone ice Oct 21, 2020, 5:56 AM

#

Alright, that's good to hear.

meager fable Oct 21, 2020, 7:01 AM

#

How to correctly specify the map in serverTravel? I have tried serverTravel Game/Maps/Arena01, serverTravel Content/Maps/Arena01, serverTravel Arena01 and copying the path via right clicking on the map and Copy file path

bitter oriole Oct 21, 2020, 7:01 AM

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"Arena01" should be enough

meager fable Oct 21, 2020, 7:02 AM

#

I'm talking about this blueprint node

#

📎 unknown.png

#

or maybe the casing is wrong or something

#

just Arena01 does nothing. Is calling serverTravel enough to bring everyone to a new map or do I need to specify something more?

bitter oriole Oct 21, 2020, 7:05 AM

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Provided it's called on the server, of course, yes

meager fable Oct 21, 2020, 7:05 AM

#

It's in game mode so I think that means there is no way for the client to call it

bitter oriole Oct 21, 2020, 7:06 AM

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Yeah, that's correct

meager fable Oct 21, 2020, 7:08 AM

#

ohh okay it's not supported in PIE

#

should check the output log more often

chrome bay Oct 21, 2020, 8:06 AM

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@kindred widget that's news to me 😄

thin stratus Oct 21, 2020, 8:25 AM

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@meager fable ServerTravel is supported, but not Seamless ServerTravel. Doesn't change your situation, but just making sure you have all info :P

meager fable Oct 21, 2020, 8:32 AM

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@thin stratus Well I didn't even know I`m using Seemless ServetTravel XD Thanks, guess I'll have to go and educate on that lol

thin stratus Oct 21, 2020, 8:32 AM

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That's setup in your GameMode properties. A little boolean basically.

#

It's more or less advised to utilize this for all your ServerTravels. Also a requirement for Steam iirc.

meager fable Oct 21, 2020, 8:34 AM

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Yeah I`m using steam services for now so that needs to stay

jagged flax Oct 21, 2020, 9:11 AM

#

Have any solution for this problem?
https://www.youtube.com/watch?v=Ggcbgp2A9O4

YouTube

Gelani Paragulgov

Client replication vehicle movement lag

4.9.2 Realese

Create BP project Vehicle

in Sedan blueprint SpringArm set EnableCameraLag = true

Package game (Widows 64)

Lanch listen server

Lanch client (in some machine)

On client vehicle is lagging when speed is high ( 100 km/h )

▶ Play video

meager fable Oct 21, 2020, 10:36 AM

#

is there a way to give my game a name while running on steam online services? Right now when I run it steam shows I'm playing spacewar

ruby rock Oct 21, 2020, 10:53 AM

#

I think that's tied in with your SteamAppId (480)?

thin stratus Oct 21, 2020, 11:21 AM

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You need your own SteamAppId, correct. So you basically have to properly register your game with Steam. Pay the fee (if that's still a thing) etc.

meager fable Oct 21, 2020, 11:30 AM

#

crap, guess me and all my friends beta testing it will look like pirates lol

kindred widget Oct 21, 2020, 12:31 PM

#

@chrome bay I might have been mistaken. I remembered reading somewhere that you were on the team that is working on a particular WW2 shooter mass battle game. Noticed it was third in my top seller list yesterday.

chrome bay Oct 21, 2020, 12:37 PM

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Oh no that's right I just read it as "global" haha

kindred widget Oct 21, 2020, 12:44 PM

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To be fair, it's still like 49th on my global top sellers. Still damn good.

meager fable Oct 21, 2020, 2:19 PM

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I have made this 2 functions inside my Game mode, when I load my map and run the game in editor everything works fine, default pawn gets replaced but when I serverTravel to the map that uses that game mode I still get spawned as default pawn

#

📎 unknown.png

#

Anyone has an idea what goes wrong here

#

Or maybe how to debug it. Seemless travel doesnt work in PIE so can't place any breakpoint or print strings

kindred widget Oct 21, 2020, 2:35 PM

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@meager fable Two notes. You're telling it to destroy your Game Mode on the Valid side of the Isvalid before spawning a new pawn. Secondly, you're in your GameMode, which means it doesn't need to be an RPC from OnPostLogin to the RespawnPlayer.

#

The second I can see if you're calling it from somewhere else for some reason, I think. Still not sure if it'd need to be an RPC though since you should call it from the server version of other actors anyhow. But definitely don't destroy your GameMode.

meager fable Oct 21, 2020, 2:38 PM

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"Instructions unclear, destroyed GameMode"

#

thanks for noticing that

#

but that still didn't fix the issue, I'm spawning as a default pawn 😦

kindred widget Oct 21, 2020, 2:40 PM

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Don't have much experience with server travelling yet. Does PostLogin actually get called after a travel?

meager fable Oct 21, 2020, 2:40 PM

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That's the biggest issue \

#

Seemless travel doesn't work in PIE

#

so no debugger

kindred widget Oct 21, 2020, 2:41 PM

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Prints should still show up.

meager fable Oct 21, 2020, 2:42 PM

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oh It doesnt get called

#

funny thing because i added a print string in OnPostLogin before and just assumed it doesn't work in standalone

kindred widget Oct 21, 2020, 2:45 PM

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Only place Prints won't work is a Shipping build, or whatever "Test" build is. Even cooked development builds still have access to the debug stuff like prints and debug drawing on traces.

meager fable Oct 21, 2020, 2:46 PM

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Moved the code to begin play and everything works fine, guess when using serverTravel everyone just stays logged in so OnPostLogin is never called

#

thanks for your help

kindred widget Oct 21, 2020, 2:47 PM

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Will keep that in mind for myself. I kind of assumed that's what PostLogin was for was just when a player was joining the session, but didn't know if it was called once for each map or specifically only when a player 'logs in'.

meager fable Oct 21, 2020, 2:48 PM

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Yeah thought that since I destroy the previous player controller when changing the game mode the new controllers have to relog

lost fulcrum Oct 21, 2020, 4:55 PM

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are structs replicated as whole even if one of their property change ?

tranquil yoke Oct 21, 2020, 5:28 PM

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Guys, My server keeps Kicking all the clients again and again , for some reason.

#

It does not happen always, but it happens some times.
Server log seems , but i can see clients disconnecting.

charred condor Oct 21, 2020, 5:38 PM

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How you setup different multiplayer game types in unreal I looked at game mode and that seemed like too much like switching between FPS and top down what I looking for is more switching between free for all or team death match

halcyon totem Oct 21, 2020, 5:41 PM

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im trying to make a simple code but its not working in multiplayer

📎 unknown.png

#

anyone know why it wouldnt work? do I need some multiplayer code to do a simple jump?

empty axle Oct 21, 2020, 5:43 PM

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@halcyon totem yes you need

#

@lost fulcrum iirc that was a thing in ue3, but now it replicates just the properties that changed

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@charred condor it is up to you. It sounds reasonable to split it into two game modes which would probably share common parent class. You could have one, but I am afraid that class would have a lot of places like:

if (mode == EFreeForAll)
{
...
}

charred condor Oct 21, 2020, 6:03 PM

#

Ok so switching game modes it is

#

Is there any easy way to switch between game modes when player selects it in UI

empty axle Oct 21, 2020, 6:09 PM

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@charred condor I don't think it is possible to change gamemode on current level without reloading it. But if you want to open certain level with game mode overriden then that is possible

charred condor Oct 21, 2020, 6:11 PM

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Basically trying to figure out this basic flow which is standard in most game

#

Player picks death match in UI and then it is death match rules of player picks CTF and plays those rules

#

If you can’t switch game modes how is something like this setup

empty axle Oct 21, 2020, 6:14 PM

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I believe that player would pick for example death match rule in the menu right?

charred condor Oct 21, 2020, 6:15 PM

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Yup

empty axle Oct 21, 2020, 6:16 PM

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then you go with a command like "open LEVELNAME?game=GameModeAlias"

#

and game mode aliases can be set up in project settings

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Under Maps & Modes advanced section iirc

charred condor Oct 21, 2020, 6:35 PM

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Is the ? Part of syntax or placeholder for level name

bitter oriole Oct 21, 2020, 6:45 PM

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No

#

Part of syntax

analog rover Oct 21, 2020, 6:54 PM

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What's the correct way to test if the current code (in a PlayerController) is running on a listen server? I saw that there is IsNetMode, but it seems to not function as expected based on what I could find when searching

kindred widget Oct 21, 2020, 6:58 PM

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@analog rover You could always GetNetMode() from your UWorld. if == NM_ListenServer

analog rover Oct 21, 2020, 7:04 PM

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Does that work correctly? I'm kind of basing my concerns on this old AnswerHub thread: https://answers.unrealengine.com/questions/902324/view.html

#

I mean, I'll give it a shot, haha

tranquil yoke Oct 21, 2020, 7:29 PM

#

Hey guys I am using If !WITH_SERVER_CODE which i think should Compile code for client.

But i am doing a local test yet, and do you think this will work, when Iam doing a server and client using commandlines

sick totem Oct 21, 2020, 7:31 PM

#

Does anyone know how to resolve issues with replicating client actions to the server via blueprint?
I checked run on server for the custom event which calls the multicast custom event which updates a counter on button click but it doesn't work. Why?

kindred widget Oct 21, 2020, 8:21 PM

#

@analog rover To be fair, that post doesn't show how or where that person got their player controller ref. If they somehow made the mistake of rpcing or anything before somehow, or they might have checked all of the player controllers on the server, which would return that they're NM_Listenserver, because those controllers all exist on the listenserver's world and they might not have specifically called it from the client version of their controller. So who knows. I've never been led wrong with World->GetNetMode()

analog rover Oct 21, 2020, 8:23 PM

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Yeah, it was very vague, but it did make me want to be a bit more cautious

kindred widget Oct 21, 2020, 8:25 PM

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@sick totem Please show what you're trying to do. WindowsKey+Shift+S takes easy screenshots for blueprint.

sleek elk Oct 21, 2020, 8:35 PM

#

HI, someone knows how to make a listen server (mapname?listen) not listen for new player anymore without map change? I changed my multiplayer to seamless travel. But today I found out that after servertravel from "lobby map" to "game map" the server is still to find per "find Session". I look for a way to make a running server which begins its game after seamless server travel to make him not being able to find the server anymore for "find session". And also not connectable for new player.
Is there any way to make a runnig listen mulitplayer server not able to find for "find session" anymore?

#

Blueprint level would be good. Currently for create, find sessions I use BP.

#

Found a old question, same content, perhaps better explained.
I post my question as comment now: https://answers.unrealengine.com/questions/498953/how-can-i-hide-my-session-from-search-once-in-the.html
If someone have a solution and want to answer on UE4 Answers I give my kudos of course.

floral crow Oct 21, 2020, 8:57 PM

#

So, I have a Lobby map where the player chooses some data. After the seamless Travel to game, I need that data to be available on clients from the very start

#

What's a clean way yo achieve this?

foggy idol Oct 21, 2020, 8:58 PM

#

Does anyone know the C++ include for the smoothsync plugin

sleek elk Oct 21, 2020, 9:03 PM

#

What's a clean way yo achieve this?
@floral crow
You could replicate the data in lobby from server to all clients and on clients save it in game instance. game instance survive all server travel and open level in every case and you have your data after server travel in each game instance directly availabe

#

Because you use seamless travel, there could be a better way, but I am self stuck at this point and google search point me ti game instance. I had questiosn by myself, nobody answered till now.
https://forums.unrealengine.com/development-discussion/blueprint-visual-scripting/102335-gamemode-variable-empty-after-seamless-travel

Unreal Engine Forums

Build powerful visual scripts without code.

#

Bt as long as you have no better solution, game instance will work in everycase. You can't replicate from/in game instance directly. But you can use your player controller or anything else which replicate to all clienst and when having data at clients, simply store in game instance. And read again later

floral crow Oct 21, 2020, 9:06 PM

#

Hm, I know about GameInstance. But that feels like a hack. I would have loved to store it on PlayerState and do the transfer, But that only guarantees the server will know about that data from the start, not clients

sleek elk Oct 21, 2020, 9:06 PM

#

Did you test already if server knows playerstate values out of lobby after server travel?

#

If so, I do not understand your problem. Then replicate it again from server to Clients at begin play

#

If you you do not want to replicate at start after server travel, game instance is the way for a solution

#

also other often point to game instance for this, also here: https://forums.unrealengine.com/development-discussion/blueprint-visual-scripting/101839-persistant-actors-after-seamless-travel "For persistent data look at Game Instance. "

Unreal Engine Forums

Build powerful visual scripts without code.

sleek elk Oct 21, 2020, 9:27 PM

#

And now you have a workaround for my question? 🙂

sick totem Oct 21, 2020, 10:12 PM

#

@kindred widget So I'm making a multiplayer app with markers in unreal. Right now when two players are in the session and try to change the brush size for the same marker, it only increments from the server side and updates it in the client . But when the client does it, the server's game brush size does not change at all. How do I replicate properly?

The second image is a quick screenshot I just grabbed right now. I know it's client to client here but still, the replication doesn't work here either.

📎 MarkerBrushIncrementMultiplayer.png

#

📎 WhiteboardMpIssue1.png

floral crow Oct 21, 2020, 11:00 PM

#

And now you have a workaround for my question? 🙂
I'm assuming it is this one:
HI, someone knows how to make a listen server (mapname?listen) not listen for new player anymore without map change? I changed my multiplayer to seamless travel. But today I found out that after servertravel from "lobby map" to "game map" the server is still to find per "find Session". I look for a way to make a running server which begins its game after seamless server travel to make him not being able to find the server anymore for "find session". And also not connectable for new player.
Is there any way to make a runnig listen mulitplayer server not able to find for "find session" anymore?
@sleek elk Unfortunately, I've no idea 😕

sleek elk Oct 22, 2020, 12:24 AM

#

I think I found a way using Advanced Sessions plugin

peak sentinel Oct 22, 2020, 2:29 AM

#

I have an OnRep for my health variable that calls Anim Montage event

📎 unknown.png

#

📎 unknown.png

#

I want to play an anim montage on the death of my AI, and when BlendOut, enable ragdoll

#

But in client montage event never executes, in server montage event executes but montage never plays

#

Where am I doing wrong?

peak sentinel Oct 22, 2020, 3:36 AM

#

Seems like this problem mentioned before 🤔 but couldnt find how to solve

📎 unknown.png

kindred widget Oct 22, 2020, 3:37 AM

#

@peak sentinel Not sure about the montage playing but why are you using OnRep and then multicasting? You're already repping the variable to all clients and you're in blueprint so that also runs on the server automatically, so it's already running everywhere, you shouldn't need to multicast at all.

peak sentinel Oct 22, 2020, 3:37 AM

#

I read in forums montages should've multicasted, so if I delete RPC and make it a regular custom-event should it work?

#

Nope didnt worked

#

Or should I carry to logic into OnRep?

kindred widget Oct 22, 2020, 3:43 AM

#

Okay. So to try to explain it easily. There's two ways that a server communicates with a client. The first and most common is replication. This is normally just a replicated variable that gets changed on the server and the server then 'replicates' it to clients. You can add a function to that variable that gets ran on the clients and server whenever that variable is replicated which is OnRep. The other way is RPCs, usually either Multicasting or RunOnOwningClient. These are usually used as one off functions for some reasons. They're avoided for a lot of gameplay logic because they don't keep state updated. For example, if you RPC a health change to all clients via multicast and a new client logs in, they will still see the default health value for that actor where as the other clients would see what was multicast. This is why you use Replication, because it easily keeps all clients up to date on replicated variables.

#

So, when you replicate your health change and run a function... you're running that OnRep on all clients and the server. Then all clients and the server will try to multicast, clients shouldn't do anything but the server will multicast to tell the montage to play. Which is pointless because all clients already have all the data they need to tell that montage to play from the OnRep.

#

What you likely read is that most montages are 'costmetic'. Think.. Players playing emotes like pointing, or waving. You don't need to replicate that state, it's easier to just have the server do a one off multicast. In your case it's a little different since this is tied to gameplay state.

peak sentinel Oct 22, 2020, 3:47 AM

#

👀

#

First of all thanks for the great explanation

#

clients shouldn't do anything but the server will multicast to tell the montage to play.
all clients already have all the data they need to tell that montage to play from the OnRep.
it's easier to just have the server do a one off multicast. In your case it's a little different since this is tied to gameplay state.

So as far as I can understand from these three rules, when death detected from server, I should call montage event without any function/variable related to OnRep, and ask server to play Anim Montage

#

But.. even on the singleplayer Montage is not playing.. I suspect this is not related to networking right now

kindred widget Oct 22, 2020, 3:54 AM

#

With the first one, I meant that for the mutlticast. I don't think clients will run that function at all, I think it gets dropped so only the server runs it.

#

Clients still run it, but only because the server multicasts. It was just a point that you're already replicating the state you need for this to happen, so the multicast is useless in this scenario. You can turn it into a normal function and just let each machine call it on their own.

peak sentinel Oct 22, 2020, 3:56 AM

#

Understood very well. Thanks a lot for the explanation

kindred widget Oct 22, 2020, 3:56 AM

#

As for the montage. Do you have your animbp set up to play montages?

peak sentinel Oct 22, 2020, 3:57 AM

#

I didnt do anything specific related to anim montages but I have anim bp and assigned to Skeletal Mesh

#

Just created a montage and created some notifies (not using notifs. yet) and tried to PlayMontage on pawn class

kindred widget Oct 22, 2020, 3:58 AM

#

Check out the bottom part of this. You have to do some stuff in the AnimBP to use the blueprint PlayMontage node like that. I'll find the other more comprehensive guide, just a sec.

#

https://docs.unrealengine.com/en-US/Engine/Animation/AnimMontage/UserGuide/index.html

#

Oh, it's in a link at the bottom of that page. The Note, See Using Layered Animations.

peak sentinel Oct 22, 2020, 4:00 AM

#

Yep, I saw that

#

It works now

#

Thanks a lot 😄 Cant believe I tried to search 4 hours of Google pages about montage-replication and missed basic engine feature like that 😄

kindred widget Oct 22, 2020, 4:01 AM

#

It happens. I thought montages played by default for a long while.

swift kelp Oct 22, 2020, 4:08 AM

#

@winged badger @dull lance I found out what my spawning issue was. It wasn't an issue due to replication and it also wasn't an issue due to the TSubclass. It was because I was needing to spawn outside the world scope. I needed to do this because I needed an alpha channel for my cards. To do that, I needed to spawn outside the sky sphere. That puts me at a massive 1639385 in an up/down direction minimum. Now normally this is not an issue unless you are playing in multiplayer (which I was). If I spawn where the player is, the issue goes away, if I spawn while in a standalone game (opposed to PIE) the issue goes away.

#

So the issue remains if both criteria are met at the same time

spawn at a 1639385 or greater distance (outside the sky sphere)
I am in PIE (with at least 2 players)

I think the real issue is 1 here.
I will need to figure a way to get an alpha channel behind my cards without going outside the sky sphere

vivid seal Oct 22, 2020, 4:50 AM

#

i'm having issues with my buff system where when a buff is removed, the removal event is only triggered on the server and one client, but no more. this event is triggered by an OnRep of a RemovalEvent struct within the buff itself.

Server determines buff should be removed
Server removes buff from active buffs array, sets the buff's RemoveEvent struct to reflect the fact that it is removed, at what time, reason for removal etc.
Server calls its version of "OnRemove"
Clients receive an OnRep RemoveEvent function, that should trigger any "OnRemove" functionality client side, like UI cleanup or removal of particle effects

the OnRemove functionality is only running on the server (where it is explicitly called when the buff is removed from the active buffs array) and one client (via OnRep), but not other clients

random nymph Oct 22, 2020, 5:04 AM

#

Does client have autonomous proxy role on player state?

fossil spoke Oct 22, 2020, 5:13 AM

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No a PlayerState is either Authority (On the Server) or SimulatedProxy (Clients)

random nymph Oct 22, 2020, 5:17 AM

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Okay. Found out InfoPlayerState->GetNetOwner()->GetLocalRole() == ROLE_AutonomousProxy works

tranquil yoke Oct 22, 2020, 5:30 AM

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Hey guys, we have a project going on oculus quest for server, but client seems to be disconnecting from the server in some time always.
we are using null subsystem right now and basically, just connecting to the ip address of the server directly, with no subsystem or something like that.

Is this happening to anyone else where client keeps disconnecting from the server and it happens for all the clients which are present in the server.

How can i get more logs on this, because on logs, i just have connection Time Out error there.
How would i make this more stable ?

faint imp Oct 22, 2020, 6:35 AM

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When using SetViewTarget, the spectating player sees the characters left and right movement (yaw) but the pitch is not replicated. Does anyone know the fix for this issue?

bitter oriole Oct 22, 2020, 6:41 AM

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You would need to have the player controller replicate the pitch through playerstate or the pawn

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With some interpolation

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Basically RPC from each player, setting the current pitch on a new property of either class, replicated, interpolated on clients

twin juniper Oct 22, 2020, 9:29 AM

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Also if I host my game through steam and players want to act as a listen server, do they have to port forward?

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Or does steam handle some sort of hole punching?

bitter oriole Oct 22, 2020, 9:42 AM

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Using the Steam OSS enables Steam's nat punch library, so no ports are required to be opened manually

twin juniper Oct 22, 2020, 9:53 AM

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ahhh

soft relic Oct 22, 2020, 10:17 AM

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@tranquil yoke Is this also happening with a local server?

twin sable Oct 22, 2020, 10:41 AM

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My clients are no longer spawning at my networkplayerstart actors and instead spawn at (0,0,0). My host/listen server player spawns at them fine though. does anyone know what might cause this?

plucky sigil Oct 22, 2020, 11:45 AM

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Does Server Travel need to be called on the server ?

twin juniper Oct 22, 2020, 11:57 AM

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Design question: If a player is killed, how should I increment the team score when the score is held in the gamestate? Should I call a method in the gamemode base and the gamemode base will update the score in the game state?

bitter oriole Oct 22, 2020, 11:59 AM

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@plucky sigil Yes

plucky sigil Oct 22, 2020, 11:59 AM

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So ill have to make a server rpc ?

bitter oriole Oct 22, 2020, 11:59 AM

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If you want a player to be able to force the server to travel with all clients, yes

ruby rock Oct 22, 2020, 12:13 PM

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After a Pawn is possessed, when is the right time to begin using that Pawn. I'm using delays at the moment, but it strikes me there is a "final" point that the Pawn has caught up with replications, loading etc. What is that point?

soft relic Oct 22, 2020, 1:22 PM

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Does this still work when called on a dedicated server? Can't seem to find my server.

📎 unknown.png

twin juniper Oct 22, 2020, 1:27 PM

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@ruby rock On clients, you always rely on when it is replicated. On the server who spawns the object, it depends on what 'using' means.

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For example, a player state might be spawned on the server and all, but the moment it exits on a client is on OnRep

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OnRep is a C++ thing

ruby rock Oct 22, 2020, 1:31 PM

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@twin juniper thanks - I'm mainly thinking about Clients (I think!). Want to be sure the system has caught up before allowing input by the player.

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So OnRep - is that shorthand for

📎 unknown.png

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If so - what would I be waiting for ? If a pawn is possessed and the associated replications, animations, etc all need to load dont they?

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Or maybe I need to put the question another way - when you use a DefaultPawn the engine seems to give the player access with everything caught up, but when I do it via using Possess - there seems to be a magical delay required.

bitter oriole Oct 22, 2020, 1:42 PM

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Well, why do you think a delay is required ?

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If you have been able to possess the pawn on client - everything is ready

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Not all replicated variables may have replicated, but that's impossible to check

ruby rock Oct 22, 2020, 1:44 PM

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Ah

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That's probably what I'm hunting for - I had expected that there was a point at which the engine would say "good to go".

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Though I'm possessing the pawn in the GameMode, not the client (GameMode being Server). Or is there another aspect?

bitter oriole Oct 22, 2020, 1:47 PM

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You are possessing in the game mode, server side

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Once the client side player controller is possessing that pawn, everything is ready

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Except of course replicated variables, since that is constant and always-ongoing, and there is no final state

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For example, I stop displaying the load screen in my game once the local player controller is controlling a valid pawn

ruby rock Oct 22, 2020, 1:49 PM

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ok - this is good.

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Do you loop and wait?

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Or are you listening for something?

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Eg OnPossess

bitter oriole Oct 22, 2020, 1:52 PM

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I usually avoid events and check on tick instead

sweet robin Oct 22, 2020, 1:53 PM

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Could anyone shed some light on how they are handling doing sounds/one off animations (anim montages) for all clients? If I'm on the server it's easy enough to call a NetMulticast, but if I'm doing something locally for the client, I have to go to the local PlayerController and call a Server RPC THEN call the NetMulticast. I know a Server RPC invoked by the client has to be called on a locally owned actor. For me that is only the local PlayerController. Is there a better solution?

ruby rock Oct 22, 2020, 1:54 PM

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Thanks @bitter oriole

twin juniper Oct 22, 2020, 2:12 PM

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@ruby rock With replicated pawns, clients do not participate in possession events. The client never possesses anything. If your clientside controller needs to know when the server has - set it's 'Pawn' property - , override AController::OnRep_Pawn(). Don't use tick or or loops.

AController::Pawn is set on the server when the controller starts possessing. That property is marked to be replicated to clients. The engine covers what you need.

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I felt like I needed to write this down

bitter oriole Oct 22, 2020, 2:13 PM

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It's perfectly fine to use tick to check for a possessed pawn

twin juniper Oct 22, 2020, 2:14 PM

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It's something that happens not too often. Why not just utilize what the engine already has, and lean towards event-driven approaches?

bitter oriole Oct 22, 2020, 2:15 PM

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Because events can be difficult to work with and unreliable. You may have received the event before the current process has started, for example.

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Use whatever works best for you

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There is no reason to tell people not to use tick instead

twin juniper Oct 22, 2020, 2:17 PM

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I heavily disagree running unnecessary conditional logic every frame when you can establish reliability with events.
Using Tick for this suggests there is no understanding of when things occur, just like Delay.

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It is reliable

bitter oriole Oct 22, 2020, 2:18 PM

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You are free to disagree

twin juniper Oct 22, 2020, 2:18 PM

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But if it works and you're happy, then it's fine of course

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I'm open to talk about the advantages

bitter oriole Oct 22, 2020, 2:20 PM

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To share a trivial example - if you have a respawn event, fade the player view to black and fade back in using OnRep_Pawn - then in that case, you need to ensure at the respawn event that the current pawn is not already the respawned one, because it might already be, if the latency was high and OnRep_Pawn fired before the respawn event had a chance to get to you. In that case, you would be waiting for OnRep_Pawn forever.

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Until you can prove that the performance of your code is bad (say, slower than the render thread), you should put reliability and ease of reading above performance

kindred widget Oct 22, 2020, 2:23 PM

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Sometimes that 0.001 ms lost is worth it for simplicity. And by sometimes, I mean all the time.

bitter oriole Oct 22, 2020, 2:23 PM

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It's probably more than 0.001ms, really

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I'm sure it can be twice that easily

twin juniper Oct 22, 2020, 2:25 PM

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I have an actor which is a visual representation of a variable. The actor has a text render which displays the variable's value. Both the variable and the actor are being replicated but for some reason the actor's text is only being updated on the server and not on the clients.

    TotalHits = 0;
    bReplicates = true;
}
void AMyProjectGameStateBase::GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const {
    Super::GetLifetimeReplicatedProps(OutLifetimeProps);
    DOREPLIFETIME(AMyProjectGameStateBase, TotalHits);
    DOREPLIFETIME(AMyProjectGameStateBase, myscore);
}
void AMyProjectGameStateBase::Hit(){
    ++TotalHits;
    myscore->DisplayScore(TotalHits);
}```
```    UPROPERTY(replicated)
    int32 TotalHits;
    
    UPROPERTY(replicated)
    AMyScore* myscore;```
Where myscore is the actor which holds the text render displayed in the game world

bitter oriole Oct 22, 2020, 2:26 PM

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Yeah, that's not how this works.

twin juniper Oct 22, 2020, 2:26 PM

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Oh?

bitter oriole Oct 22, 2020, 2:27 PM

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Your TotalHits variable needs to be changed only on the server ; it will then replicate to clients ; and you can use a ReplicatedUsing event to update your score actor

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The score actor should not be replicated

twin juniper Oct 22, 2020, 2:27 PM

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I'm not sure I understand the example properly, but whatever.

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Your TotalHits variable needs to be changed only on the server ; it will then replicate to clients ; and you can use a ReplicatedUsing event to update your score actor
@bitter oriole The hit method is called from the actor class only inside if(HasAuthority())

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        AMyProjectGameMode* MyGameMode = GetWorld()->GetAuthGameMode<AMyProjectGameMode>();
        
        if(MyGameMode){
            MyGameMode->Hit();
        }
    }``` 
GamemodeHit then calls gamestate hit

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    if(GameState){
        GameState->Hit();
    }```

bitter oriole Oct 22, 2020, 2:29 PM

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The hit method should not be calling DisplayScore, that should be called in the replication event for TotalHits, or using tick.

twin juniper Oct 22, 2020, 2:29 PM

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Ooh

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So

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There should be a replication callback method?

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And then update it in there?

bitter oriole Oct 22, 2020, 2:30 PM

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(Actually it should be calling it on DisplayScore too if it's a listen server, rather than a dedicated server)

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But yeah

twin juniper Oct 22, 2020, 2:30 PM

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Yes

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It's a listen server

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Essentially displayscore doesn't really display the score, it's already being displayed.

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IT's basiaclly updating the value

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To be displayed.

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OOoh I think I see th e issue

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hmm nevermind I don't

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Yes it's my variables, they aren't being replicated.

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Since my callback isn't being called.

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    UFUNCTION()
    void OnRepTotalHits();
    
    UFUNCTION()
    void OnRepUpdateDisplay();
    
private:
    UPROPERTY(ReplicatedUsing = OnRepTotalHits)
    int32 TotalHits;
    
    UPROPERTY(ReplicatedUsing = OnRepUpdateDisplay)
    AMyScore* myscore;```

bitter oriole Oct 22, 2020, 2:40 PM

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myscore should not be replicated.

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At least not for that purpose here

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If it's a visual effects widget it doesn't need to be replicated at all

twin juniper Oct 22, 2020, 2:41 PM

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Yes it's a visual widget

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spawned in the game world.

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I guess I don't need to replicate it.

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But now I'm just wondering why total hits isn't being replicated..

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I have bReplicates = true; in the constructor and void AMyProjectGameStateBase::GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const { Super::GetLifetimeReplicatedProps(OutLifetimeProps); DOREPLIFETIME(AMyProjectGameStateBase, TotalHits); }

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Oh now it's replicating.

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That's weird..

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Didn't change anything.

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except the display isn't being updated. So I think that actor display has to be repliacted as well..

bitter oriole Oct 22, 2020, 2:47 PM

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No, it does not

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OnRepTotalHits should be updating the display

kindred widget Oct 22, 2020, 2:47 PM

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The actor only needs to replicate if you want it's properties to replicate. You're not replicating properties in the actor. You're affecting the actor on each client.

twin juniper Oct 22, 2020, 2:48 PM

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hmm then I must be doing something else wrong.

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OnRepTotalHits should be updating the display
@bitter oriole okay let me try that

kindred widget Oct 22, 2020, 2:48 PM

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IE, Replicate in your Gamestate, then in your gamestate get a local machine pointer to that actor and set it's value.

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Alternatively! Do it the UI way.

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Replicate the value and just make the machine's actor get game state and get the value on tick or something.

bitter oriole Oct 22, 2020, 2:49 PM

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More accurately, the widget should simply fetch the game state, which is unique, and read TotalHits on tick

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lmao, ninja'd

rich ridge Oct 22, 2020, 2:50 PM

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The good way is to do reactive approach.

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listen for replication change and then do Broadcast

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and your UI is listening to broadcast.

bitter oriole Oct 22, 2020, 2:51 PM

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It's one way

twin juniper Oct 22, 2020, 2:51 PM

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More accurately, the widget should simply fetch the game state, which is unique, and read TotalHits on tick
@bitter oriole This might be the best way to do it tbh

bitter oriole Oct 22, 2020, 2:51 PM

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It's also still a lot simpler to read the game state on tick

kindred widget Oct 22, 2020, 2:51 PM

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Eh. I'd rather just have UI get it's data straight from the GameState. No extra hookups and it simply doesn't happen when you put the UI away.

bitter oriole Oct 22, 2020, 2:51 PM

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GameState*

kindred widget Oct 22, 2020, 2:51 PM

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Yeah that.

rich ridge Oct 22, 2020, 2:52 PM

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hmm its totally individuals choice.

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personally I don't spam my tick functions.

bitter oriole Oct 22, 2020, 2:52 PM

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You should

twin juniper Oct 22, 2020, 2:53 PM

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If you enjoy technical debt

bitter oriole Oct 22, 2020, 2:53 PM

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This is the very opposite of technical debt

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It's really simple code that is easy to improve or remove

rich ridge Oct 22, 2020, 2:53 PM

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any wrong code in tick function may cause janks and it is very difficult to find which Tick function is causing jank

bitter oriole Oct 22, 2020, 2:53 PM

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"jank" ?

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"wrong code" ?

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Tick is just a function, it doesn't have magical superpowers

kindred widget Oct 22, 2020, 2:54 PM

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Saying not to use tick because you might mess it up is like saying not to eat food because you might retardedly choke on it.

rich ridge Oct 22, 2020, 2:54 PM

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jank (this is Android term)-> framee freezing

bitter oriole Oct 22, 2020, 2:54 PM

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If you have low performance because of game thread usage with UE4, you have been doing some wild stuff

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It takes a lot

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But it doesn't matter - you can trivially identify which actor uses too much time and optimize it

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You can do that when the game is close to shipping, and you know features are final

rich ridge Oct 22, 2020, 2:55 PM

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Saying not to use tick because you might mess it up is like saying not to eat food because you might retardedly choke on it.
@kindred widget there are many things that should not happen on tick functions.

bitter oriole Oct 22, 2020, 2:56 PM

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That's bullshit.

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The entire engine literally runs on tick

rich ridge Oct 22, 2020, 2:56 PM

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when I know the value of x is 10 for 10 minutes, why to read and update UI every frame?

bitter oriole Oct 22, 2020, 2:57 PM

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Because you have an animation on that UI that needs ticking anyway
Because the value will change more often than that anyway
Because it's much simpler, and thus better, until you know the performance is subpar

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And I would add - because that feature has a high chance of being cut during production

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Optimize when you know it's making shipping

twin juniper Oct 22, 2020, 2:58 PM

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Or establish a scalable solution right away, which isn't that complicated as you describe it as.

bitter oriole Oct 22, 2020, 2:58 PM

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Or lose production time for every single prototype

twin juniper Oct 22, 2020, 2:58 PM

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Tick is easier for sure

rich ridge Oct 22, 2020, 2:58 PM

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Or lose production time for every single prototype
@bitter oriole this is good point.

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and i agree

bitter oriole Oct 22, 2020, 2:58 PM

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For the record, I optimize C++ code for a living

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Don't optimize your code until you know for a fact that it needs to

twin juniper Oct 22, 2020, 2:59 PM

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I agree with you on lots of parts about fast prototyping, it's often not worth premature optimizing

bitter oriole Oct 22, 2020, 3:00 PM

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So don't waltz in telling people not to use tick on what's a complete beginner discussion on how to update UI

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Do that when people have a profiler log with high tick time

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If you don't have profiler record, you don't have a performance problem

rich ridge Oct 22, 2020, 3:01 PM

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ok

twin juniper Oct 22, 2020, 3:01 PM

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ok

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I'm not the one telling you to not use Tick, Epic Games is

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Hey, so I'm working on a combat system for my game and I've found that only TArrays can be replicated. Does the FFastArraySerializer happen by default?

bitter oriole Oct 22, 2020, 3:05 PM

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@twin juniper Feel free to provide a quote from Epic telling you not to use Tick in C++

twin juniper Oct 22, 2020, 3:06 PM

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Or do I need to call it somehow myself?

bitter oriole Oct 22, 2020, 3:06 PM

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What do you mean "only TArray" ?

twin juniper Oct 22, 2020, 3:06 PM

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@bitter oriole https://youtu.be/2edoacF53F0?t=1854

YouTube

Unreal Engine

Overcoming Common Early Challenges in Unreal Engine | Dev Days 2018...

This practical discussion led by Senior Dev Rel Tech Artist Zak Parrish presents an overview of common issues that arise during a studio’s first six months on a UE4 project, focusing on solutions. Topics include general best practices, optimization guidelines, and how to avoid...

▶ Play video

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in terms of containers I mean

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TMap, TSet can't be replicated UProps, is that right?

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"Just don't look at it, don't touch it..."

bitter oriole Oct 22, 2020, 3:07 PM

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The slide is about Blueprint

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Not C++

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So I'm asking again

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@twin juniper Feel free to provide a quote from Epic telling you not to use Tick in C++

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📎 unknown.png

kindred widget Oct 22, 2020, 3:08 PM

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They also say that because designers try to calculate the meaning of life on tick sometimes. You can feel free to use it in blueprint too if you use it carefully.

twin juniper Oct 22, 2020, 3:08 PM

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It's not me who is endorsing this because of 'ego'. I like to use what's considered good practice. Not if it takes too much prototyping time.

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@twin juniper I do think BP makes a big difference, in my own testing I found C++ to be 62.9 times faster at doing a simple loop so, there is some overhead there

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There's nothing wrong in advising people not to use tick

bitter oriole Oct 22, 2020, 3:08 PM

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There's plenty wrong

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And you're making false claims now

twin juniper Oct 22, 2020, 3:09 PM

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Easy

bitter oriole Oct 22, 2020, 3:09 PM

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I'm not the one telling you to not use Tick, Epic Games is

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This is a false claim, as far as C++ is concerned

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And it's not even completely true for Blueprint, other than yes, you should think twice about it

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So now I'll just block you, feel free to keep posting bullshit advice to beginners who check notes are learning how to update a text block

twin juniper Oct 22, 2020, 3:11 PM

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C++ ticking goes unnoticeable often times

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What?

bitter oriole Oct 22, 2020, 3:11 PM

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@twin juniper Yes, the overhead of Blueprint is significant

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Of course a loop is measuring only the overhead, so "XXX faster" is a bit inaccurate

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But loops in Blueprints are pretty much a bad idea

twin juniper Oct 22, 2020, 3:12 PM

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Strangely enough..now the variable is being updated for every client EXCEPT the listen server 😂

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I'm so confused

bitter oriole Oct 22, 2020, 3:12 PM

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Alright, so

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Are you updating the UI when you set the value on server ?

twin juniper Oct 22, 2020, 3:12 PM

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In a tick yes

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In the event tick

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I'm grabbing the value

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From the game state

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And displaying it.

bitter oriole Oct 22, 2020, 3:13 PM

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Well, in that case there isn't much that can go wrong

twin juniper Oct 22, 2020, 3:14 PM

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@twin juniper Perhaps you have an old function or something that is inside a HasAuthority() block that you have missed or forgotten about while refactoring?

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I mean that is overwriting the value on the listen server

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Hmm.

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You could be right..

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But not anywhere that I can see, no.

bitter oriole Oct 22, 2020, 3:15 PM

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What does the UI code look like ?

twin juniper Oct 22, 2020, 3:16 PM

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📎 Screenshot_2020-10-22_at_11.14.41_AM.png

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And this is my code

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I'm replicating the variables like so

void AMyProjectGameStateBase::GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const {
    Super::GetLifetimeReplicatedProps(OutLifetimeProps);
    DOREPLIFETIME(AMyProjectGameStateBase, TotalHits);
    DOREPLIFETIME(AMyProjectGameStateBase, TotalHitsRead);
}

Then in my hit which gets called from the actor under HasAuthority I do

       ++TotalHits;
       UE_LOG(LogTemp,Warning,TEXT("Player was hit"));
   }
   ```
Then in my callback for the hit event, I have
```void AMyProjectGameStateBase::OnRepTotalHits(){
   UE_LOG(LogTemp,Warning,TEXT("Hits replicated event"));
   //myscore->UpdateScoreDisplay(TotalHits);
   TotalHitsRead = TotalHits;
}```
Where totalhitsread is the variable accessible to blueprints. 
```    UPROPERTY(BluePrintReadOnly,replicated)
   int32 TotalHitsRead;```

bitter oriole Oct 22, 2020, 3:17 PM

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You don't need any of that if you use Tick.

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Remove TotalHitsRead and read TotalHits directly

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Also remove OnRepTotalHits

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The reason it doesn't update on server is that OnRepTotalHits can never be called on server

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It's called when the client gets new data from the server

twin juniper Oct 22, 2020, 3:17 PM

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Ahhhhhh

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MAKES SO MUCH SENSE!

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You genius

bitter oriole Oct 22, 2020, 3:18 PM

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So just write TotalHits on server, replicate it, read it

twin juniper Oct 22, 2020, 3:18 PM

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I feel so dumb with Unreal Engine.

bitter oriole Oct 22, 2020, 3:18 PM

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It's just that simple if you use Tick

twin juniper Oct 22, 2020, 3:18 PM

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Hold on let me change something.

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And check if it works after

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BAsed on what you said.

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That works!

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Okay so it was because of the OnRepTotalHits

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like you said

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But

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I'll take your advice and remove it all

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And use just the blueprint

bitter oriole Oct 22, 2020, 3:20 PM

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Now when / if you decide not to use tick, and use ReplicatedUsing instead - wouldn't update the UI in tick at all, and use the event on the replicated variable, AND the setting function on the server (no rep event on server, remember ?) to find the UI widget and update it

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As people mentioned here, that's more efficient performance-wise

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You can also keep the tick as I suggested, I trust that both points were made thoroughly

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Just wanted you to have something working first

twin juniper Oct 22, 2020, 3:21 PM

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So going back to what you said, I don't even need to replicate TotalHits and TotalHitsRead, if I'm using the tick to read the variables from the gamestate?

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Please tell him that we're here to have a civil chat. There's no need to get heated on it.

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Or do they still need to be replicated?

bitter oriole Oct 22, 2020, 3:21 PM

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Yes you do need to rep TotalHits

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Or the client never gets any update at all

twin juniper Oct 22, 2020, 3:21 PM

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Got it.

bitter oriole Oct 22, 2020, 3:22 PM

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You do not need TotalHitsRead at all, though, not replication events on TotalHits, since you just read and update every frame no matter what.

twin juniper Oct 22, 2020, 3:22 PM

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Okay let me make the adjustments you gave me.

rich ridge Oct 22, 2020, 3:22 PM

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Please tell him that we're here to have a civil chat. There's no need to get heated on it.
@twin juniper are you refering to me?

twin juniper Oct 22, 2020, 3:22 PM

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No

rich ridge Oct 22, 2020, 3:22 PM

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I was calm

twin juniper Oct 22, 2020, 3:23 PM

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I was talking about Stranger.

rich ridge Oct 22, 2020, 3:23 PM

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ok

twin juniper Oct 22, 2020, 3:23 PM

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I didn't expect his heated response

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I didn't see him give a heated response to anyone. He certainly didn't give one to me. He's been nothing but kind and helpful.

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"So now I'll just block you, feel free to keep posting bullshit advice to beginners who check notes are learning how to update a text block"

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Totally unnecessary. I wasn't being hostile at all or endorsing bad ideas

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Oh.

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I Apologise for that.

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No problem!

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@bitter oriole I foudn the issue that was happening last time. Before I was updating the text in HasAuthority only but I changed the code to update the text in both HasAuthority and OnRepTotalHits so once for the server to see it and the other for the clients to see it.

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And that does work!

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So I removed the OnTick code,a nd went back to my previous.

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But I figured the update needed to occur on botht he clients and the server.

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ANd before I was updating it only on the server because of HasAuthority.

kindred widget Oct 22, 2020, 3:46 PM

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You shouldn't have had to update the text in the HasAuthority, or OnRep really. What we were talking about before was simply replicating the property on the GameState, and then telling the clients to have their TextRender actor's tick get the client's gamestate and get the replicated value to display.

tranquil yoke Oct 22, 2020, 3:58 PM

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@soft relic yes

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But it is very less locally

soft relic Oct 22, 2020, 4:02 PM

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I got it to work after a lot of researching, it's actually not local if you forward the port

twin juniper Oct 22, 2020, 4:04 PM

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You shouldn't have had to update the text in the HasAuthority, or OnRep really. What we were talking about before was simply replicating the property on the GameState, and then telling the clients to have their TextRender actor's tick get the client's gamestate and get the replicated value to display.
@kindred widget Yes I did manage to get it working with tick event.

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I went back to doing it the previous way because i was curious why I couldn't get it working.

#

But it worked fine with the tickbased system.

soft girder Oct 22, 2020, 4:04 PM

#

anybody ever had a variable like pitch for example not replicate even on On rep notify?

winged badger Oct 22, 2020, 4:05 PM

#

there is a tiny bug in the engine there
if you have only one replicated variable in a custom class, and its ReplicatedUsing, it won't be replicated

soft girder Oct 22, 2020, 4:10 PM

#

might not be my issue. i moved to on tick animation started working right

#

but weapons are still broken but its prob because i split the struct pin on camera to feed in that new pitch thats incorrect because its a delta. i need to get the delta in the anim blueprint only]

#

i was just setting actor to use control rot pitch before becuz no anims

#

but now i think i got it

#

ok im on to something

#

one weapon is working now

kindred widget Oct 22, 2020, 4:20 PM

#

@winged badger Does that still apply for child classes? Or has it been fixed? I don't have that issue in places like a class inheriting from ACharacter

winged badger Oct 22, 2020, 4:21 PM

#

not sure, last time we ran into it was someone else on the team, and i don't remember which class was it on

soft girder Oct 22, 2020, 4:21 PM

#

i kinda wanna reproduce it tbh. just to show the guys and girls an example

winged badger Oct 22, 2020, 4:21 PM

#

think it was AActor derived

#

4.22 or 4.24

soft girder Oct 22, 2020, 4:21 PM

#

AActor makes sense

#

i was RepNotify and setting off input axis which was wrong

#

lol

winged badger Oct 22, 2020, 4:22 PM

#

if just one weapon is working now, thats a little bit scary

soft girder Oct 22, 2020, 4:22 PM

#

i got them all now

winged badger Oct 22, 2020, 4:22 PM

#

if all my weapons explode, fine that could happen if someone fucks up

soft girder Oct 22, 2020, 4:23 PM

#

i hate rep'ing pitch on tick like that

winged badger Oct 22, 2020, 4:23 PM

#

just one tho... that would be real scary

soft girder Oct 22, 2020, 4:23 PM

#

now my only bug left is clients not destroying old actor when swapping

#

all else see correct

#

but the client for what ever reason keeps it in his hand and just spawns the next gun

#

i will def have to redo all this later. im swimming in a mess trying to get anims on point. i should have attached camera to head bone and not worried about it

#

we use cam pos and rot to calc alot of shots

winged badger Oct 22, 2020, 4:25 PM

#

you do know that we have absolutely no context on what you're talking about, yes? 😄

#

which is fine

#

🦆

soft girder Oct 22, 2020, 4:26 PM

#

:}

#

i have to do a custom disarm to swap from certain guns in order for each weapon to show the correct predictive targeting material billboard position

twin juniper Oct 22, 2020, 4:28 PM

#

Do I need to be partnered with steam to use the steam only subsystem?

soft girder Oct 22, 2020, 4:29 PM

#

if a weapon lets say is not hitscan it will move this billboard factoring your speed and theirs with the speed of projectile so each shot in the box is going to hit unless they dodge. for what ever reason this is not working now after using the new mesh and animations.

#

@twin juniper idk but i didnt think so.

#

you can use the test app id to get everything working and then replace it with the correct app id once you pay the fee

twin juniper Oct 22, 2020, 4:29 PM

#

Ooh okay

kindred widget Oct 22, 2020, 4:37 PM

#

Just quadruple checking. There's nothing special you have to do to a struct except specify which properties in it replicate, and set the struct to replicate in your class? It'll replicate just the specific replicated properties when they change and not the whole struct each time one single property is changed?

winged badger Oct 22, 2020, 4:46 PM

#

any UPROPERTY that doesn't have NotReplicated specifier change will cause entire struct to replicate

#

struct UPROPERTIES don't need Replicated, you need to explicitly add NotReplicated if you don't want a UPROP to replicate

toxic schooner Oct 22, 2020, 4:56 PM

#

has anyone found a way to do reliable cooldowns in multiplayer with gameplay ability system?

tranquil yoke Oct 22, 2020, 5:02 PM

#

Guys, Can you check this log and tell me , what is happening there

📎 LogFromServer.txt

sleek elk Oct 22, 2020, 5:15 PM

#

Somebody knows how and why it can happen that after server travel client players do not have a valid player state?
I will write also a question on answerhub and add some screenshot. At the moment the page has a problem. But it is really simple explained, after servertravel sometimes player have not valid player states when access "player state" in player controller.

sleek elk Oct 22, 2020, 5:33 PM

#

If someone is here who have good knowledge on UE4 networking, help help would be great.
Answerhub is online again and I put a question there.
https://answers.unrealengine.com/questions/991441/player-state-not-valid-after-servertravel.html

summer jolt Oct 22, 2020, 5:37 PM

#

Hey guys I was wondering can I do replication in actor component or actor that will attach to the character ?

meager fable Oct 22, 2020, 5:45 PM

#

@sleek elk I get Access Denied after clicking on the link

sleek elk Oct 22, 2020, 5:55 PM

#

@meager fable ue4 website was down some hours ago, perhaps in some countries it is still offline

#

perhaps now it is working? https://answers.unrealengine.com/questions/991441/player-state-not-valid-after-servertravel.html

solemn ledge Oct 22, 2020, 6:26 PM

#

Still says access denied

#

Can you screenshot your question or something @sleek elk ?

sleek elk Oct 22, 2020, 6:34 PM

#

A bit large text for simple problem. But I explained also what i tried and what I found in forumsthreas and answerhubs:

📎 unknown.png

kindred widget Oct 22, 2020, 7:14 PM

#

@summer jolt https://docs.unrealengine.com/en-US/Gameplay/Networking/Actors/Components/index.html

sleek elk Oct 22, 2020, 8:07 PM

#

@solemn ledge : Could you get a look on my screenshot. At the moment I try to get more in detail and test more to get rid of the "random" buggy behaivor. I try to use different game modes for Lobby and game now.

meager spade Oct 22, 2020, 8:12 PM

#

@soft girder why are you replicating pitch

#

i don't understand?

solemn ledge Oct 22, 2020, 8:27 PM

#

@sleek elk That screenshot is pretty much unreadable lol

grand lily Oct 22, 2020, 8:31 PM

#

I've got a strange issue I wonder if anyone could help me with.

During PIE with 2 players and net mode as Listen Server if I call this code on the server it loads the specified map for the server, but the client automatically also switches map, but goes to the Game Default Map instead.

Expected behavior is that only the server loads the map (allowing the client to join later).

📎 unknown.png

#

what makes this stranger is that it works fine in an earlier version of my project, running also on UE4.26

#

and I have not changed anything in this part of the code

#

any clues where I should start looking?

sleek elk Oct 22, 2020, 8:35 PM

#

@solemn ledge: When I click it in discord, under the screenhot is a node, show in orignal and then it is bigger. But perhaps the button is only on my side because I sent it 🙂

#

And still down non your end? https://answers.unrealengine.com/questions/991441/player-state-not-valid-after-servertravel.html

solemn ledge Oct 22, 2020, 8:37 PM

#

@sleek elk Still down

tranquil yoke Oct 22, 2020, 8:37 PM

#

Hey guys, do you know what are the best way to debug, network profiler, what should be the optimal values for the game, i understand all the values, though .
can some one help , is there any doc on this

solemn ledge Oct 22, 2020, 8:37 PM

#

@sleek elk Ah okay didn't know about that button haha

sleek elk Oct 22, 2020, 8:38 PM

#

@grand lily: I think there is something wrong, I do not know why it should work before, but you have to start listen server, then open a map and have player joined., When when they are youned you can "ServerTravel" with them

#

But i think you can not "open level with them in pack

solemn ledge Oct 22, 2020, 8:39 PM

#

@sleek elk So like basically you're doing a server travel and then the variable isn't valid anymore?

sleek elk Oct 22, 2020, 8:39 PM

#

right, that the basic one sentence version

solemn ledge Oct 22, 2020, 8:39 PM

#

okay!

#

Weird

sleek elk Oct 22, 2020, 8:40 PM

#

Important... only sometimes, its player state ... i don't get the random behaivor 😦

#

yes, wired also for me.

grand lily Oct 22, 2020, 8:40 PM

#

@sleek elk: Yes, that is how it worked before. I do not want the client to automatically open a map (and the wrong one at that) when the server opens it. No idea why it happens

sleek elk Oct 22, 2020, 8:42 PM

#

You start PIE I think in listen server mode. Then you start the BP nodes you show me. Then Server opens map, clients get back to default map.

#

So, as designed I think

solemn ledge Oct 22, 2020, 8:43 PM

#

@sleek elk First of all i think you need to set the playerstate to your one for both maps.

grand lily Oct 22, 2020, 8:44 PM

#

really? Whenever you call OpenMap on the server the client is supposed to be sent to whatever is set as DefaultMap in the project settings?

sleek elk Oct 22, 2020, 8:44 PM

#

@solemn ledge: ehat was my setup for the last two days having this strange behavor. A few hours ago I started to change my setup to two different game modes with different Mode, Playerstate, Gamestare. one for lobby, one for Game player. At the momentan it seems then this "player state" not valid is not happen on server travel to game play map

#

But I do not really understand it, because I think the way you suggest should work

#

having same playerstate and then server travel

solemn ledge Oct 22, 2020, 8:45 PM

#

It shouldn't work if you use two different playerstates

#

That should absolutely not work

sleek elk Oct 22, 2020, 8:45 PM

#

I use "seamless travel " in all GM aI use, just as sidenote

solemn ledge Oct 22, 2020, 8:46 PM

#

Hmm idk honestly. I have to go to sleep now sorry.

#

I can help tomorrow though!

sleek elk Oct 22, 2020, 8:46 PM

#

But it work, I can show you 🙂

#

ok.

#

would be nice. Have no one to ask 😉

solemn ledge Oct 22, 2020, 8:46 PM

#

Lol np

sleek elk Oct 22, 2020, 8:46 PM

#

Good night and sleep well

solemn ledge Oct 22, 2020, 8:46 PM

#

Thanks!

sleek elk Oct 22, 2020, 8:46 PM

#

Monokkelheute um 22:44 Uhr
really? Whenever you call OpenMap on the server the client is supposed to be sent to whatever is set as DefaultMap in the project settings?

#

yes

grand lily Oct 22, 2020, 8:46 PM

#

hey, I think you're right, @sleek elk. Seems like that is what I missed .)

#

thanks!

sleek elk Oct 22, 2020, 8:47 PM

#

Definetly, when I am in multiplayer and My Server goes back to Main menu, then my clients drop all to default ap

#

map

#

your welcome, happy to help 🙂

#

If you want to see my strange problem, have a look :-)
https://answers.unrealengine.com/questions/991441/player-state-not-valid-after-servertravel.html

grand lily Oct 22, 2020, 8:48 PM

#

I'm getting access denied for that link

sleek elk Oct 22, 2020, 8:49 PM

#

setve had this also, I do not now way

grand lily Oct 22, 2020, 8:49 PM

#

odd

sick totem Oct 22, 2020, 8:53 PM

#

how do you replicate variables properly?
What i have set up is a text box and when the user hits a key it increments or decrements the number in the textbox.
From server to client it replicates properly but not client to server. What am i missing?

sleek elk Oct 22, 2020, 8:54 PM

#

only owner of an actor can replicate to server
for replicate to server use "Run on server" for the event
just try to check "reliable" in the event settings under "replicates"

#

That's with RPC

#

when you mean replicating variales per autpo replciate on change

#

then you are right, that just work from server to client and NOT from Client to server

#

make calciulations on server and then replicate on clients, that the way to go

#

If you need to Inform the server about values from client side, you can only use RPC (thats the way I described first, use a event and set replicates "on server")

#

@sick totem

#

So I think you just missed that "replicate variables" on change per variable set to "replciated" is a one way ticket from Server to ALL clients. But never from Client to server

grand lily Oct 22, 2020, 9:03 PM

#

hmm, so I've got another problem. Joining the correct map now works fine, but the client possessed the default pawn instead of the one I have set in the game mode of the map

#

is there another obvious step I'm missing here?

sleek elk Oct 22, 2020, 9:08 PM

#

2 things.... check the world settings of the map/level, if also in the worl settings of the map Gamemode and assign pawn is the way you expect.
make sure your in the map/level has no pawns placed which are player pawns and the player will get controll over

#

beside this, i have no isea. My player get the pawns I have assigned in the map/gamemode

grand lily Oct 22, 2020, 9:09 PM

#

checked both of those. must be something different

#

but thanks for the ideas

sick totem Oct 22, 2020, 9:15 PM

#

I'll look into this some more but thank you!

lucid vault Oct 22, 2020, 11:21 PM

#

Is there any way to tell if an actor has an owner from clients?

#

GetOwner returns null on clients when it is set to a PC on the server

#

PC doesn't replicate, so that probably causes issues

#

Do I need to just create a separate replicated variable for clients to determine if an actor has an owner? Sounds like a gross solution

twin juniper Oct 22, 2020, 11:56 PM

#

My game client is crashing when attempting to call CreateSession from OnlineSubSystem.

#

This is the code.

#

    IOnlineSubsystem* Subsystem = IOnlineSubsystem::Get();
    
    if(Subsystem){
        Session = Subsystem->GetSessionInterface();
        if(Session.IsValid()){
            //bind delegates here
            Session->OnCreateSessionCompleteDelegates.AddUObject(this,&ULobbySessionGameInstance::OnCreateSessionComplete);
            
        }
    }
}

void ULobbySessionGameInstance::OnCreateSessionComplete(FName ServerName,bool Succeeded){
    UE_LOG(LogTemp, Warning, TEXT("Succeeded %d"),Succeeded);
}
void ULobbySessionGameInstance::CreateServer(){
    UE_LOG(LogTemp, Warning, TEXT("Creating Server"));
    FOnlineSessionSettings SessionSettings;
    SessionSettings.bAllowJoinInProgress = false;
    SessionSettings.bIsDedicated = false;
    SessionSettings.bIsLANMatch = true;
    SessionSettings.bShouldAdvertise = true;
    SessionSettings.bUsesPresence = true;
    SessionSettings.NumPublicConnections = 5;
    
    if(Session.IsValid()){
        UE_LOG(LogTemp, Warning, TEXT("Session was valid"));
        Session->CreateSession(0,TEXT("My Session"),SessionSettings);
    }else{
        UE_LOG(LogTemp, Warning, TEXT("Session not valid"));
    }
    ```

#

Session pointer is valid,

#

But calling Session->CreateSession just crashes.

#

📎 Screenshot_2020-10-22_at_7.58.30_PM.png

soft girder Oct 23, 2020, 12:39 AM

#

@soft girder why are you replicating pitch
@meager spade it's a long story

soft girder Oct 23, 2020, 1:12 AM

#

Is there a better way?

#

Plus after spawning weapon to hand on animations has done some funky stuff

meager spade Oct 23, 2020, 1:22 AM

#

i have never needed to replicate pich

#

i just get it 🤷

soft girder Oct 23, 2020, 1:26 AM

#

My playercharcater is no longer use control rotation

#

Is there a way around this?

#

Replicating pitch messed all my guns up. Really threw a wrench in my shit last night

#

In order for the dude to look up and down in aimoffset I thought pawn couldn't use the control rotation

#

Any guidance is appreciated

meager spade Oct 23, 2020, 1:36 AM

#

oh i use control rotation

#

{
    float ClampedPitch = (RemoteViewPitch * 360.f / 255.f);
    ClampedPitch = ClampedPitch > 90.f ? ClampedPitch - 360.f : ClampedPitch;
    return FMath::Clamp<float>(ClampedPitch, -89.f, 89.f);
}

float AKaosPawn::GetViewPitch() const
{
    if (!IsLocallyControlled())
    {
        return GetRemoteViewPitch();
    }

    return GetBaseAimRotation().Pitch;
}``` i have this

meager spade Oct 23, 2020, 1:59 AM

#

that RemoveViewPitch is inside Pawn.h /** Replicated so we can see where remote clients are looking. */ UPROPERTY(replicated) uint8 RemoteViewPitch;

#

like i said i never manually replicate pitch

soft girder Oct 23, 2020, 2:05 AM

#

I knew it was crazy :)

#

Thank you

#

Is that get base aim rotation exposed to bp?

kindred widget Oct 23, 2020, 2:23 AM

#

It is, I've at least used it for animation stuff.

tranquil yoke Oct 23, 2020, 2:42 AM

#

Hey , how often we can use RPC on tick for reliable

#

?

kindred widget Oct 23, 2020, 2:50 AM

#

You need a lot more context for that question. Not even sure if you mean reliable RPCs or RPC often for reliability.

peak sentinel Oct 23, 2020, 2:52 AM

#

Afaik you should never use reliable RPC on tick if thats the question

tranquil yoke Oct 23, 2020, 2:58 AM

#

yes that is what i meant, should we use reliable rpc calls on tick

#

to replicate movement, is to okay to use replicate movement, does that do justice to your movement ?

peak sentinel Oct 23, 2020, 3:02 AM

#

to replicate movement, is to okay to use replicate movement, does that do justice to your movement ?
didnt understand what you meant lol but its an engine feature yeah its only replicating movement

kindred widget Oct 23, 2020, 3:10 AM

#

You probably should not use Reliable RPCs on tick. As far as I understand it, Reliable should be reserved for state changing calls. For example, a client telling the server that it wants to pull or release the trigger of a weapon. You might make these reliable so that pressing and releasing the mouse button always updates state and doesn't drop packets and leave a character running around shooting a wall even though they released the mouse button. Where as RPCs on tick are generally unreliable. They're just a constant stream of desired input from a client. They don't need to be reliable because you're sending them so often, it shouldn't matter if some of them get dropped.

peak sentinel Oct 23, 2020, 3:19 AM

#

I need to ask a question too: Should I code my key binding in pawn or controller? I've tried controller before, had issues with server-side nodes/functions, but if I need to use pawn where should I use controller?

#

My main code flow goes around pawn-playerstate-gamestate-hud

kindred widget Oct 23, 2020, 3:27 AM

#

You should put it in the place that it's used. Don't put a key binding that moves the character in the controller. Put it in the character.

wanton tulip Oct 23, 2020, 4:36 AM

#

Hello, I have a question about the PartyInterface. I have put on my online beacons and am now asking myself whether it is possible to connect to the host beacon using the party interface. The FURL that I need for this only supports SessionSearchResult and IP. does anyone here have an idea?

quartz smelt Oct 23, 2020, 5:28 AM

#

Is there a reason why the host is invisible to the client? I made sure no weird settings got changed. This ONLY happens when I change the skeleton

#

And when I recode it in the EXACT same way, it works

soft girder Oct 23, 2020, 5:52 AM

#

Owner only see?

#

Only owner see

quartz smelt Oct 23, 2020, 6:15 AM

#

Nah didn't change anything:(

barren warren Oct 23, 2020, 7:11 AM

#

Has anyone come across an issue where CharacterMovement is doing network smoothing before an openlevel has finished connecting to a new level? We're seeing an occasional (Maybe 30-40% of the time) crash with the following [2020.10.23-06.49.28:993][712]LogWindows: Error: Assertion failed: GetNetMode() != NM_Standalone [File:D:/unreal_versions/UnrealEngine-4.24/Engine/Source/Runtime/Engine/Private/Components/CharacterMovementComponent.cpp] [Line: 7261] which is happening in ```void UCharacterMovementComponent::SmoothClientPosition(float DeltaSeconds)
{
if (!HasValidData() || NetworkSmoothingMode == ENetworkSmoothingMode::Disabled)
{
return;
}

// We shouldn't be running this on a server that is not a listen server.
checkSlow(GetNetMode() != NM_DedicatedServer);
checkSlow(GetNetMode() != NM_Standalone);``` Seems like to me it's trying to run netcode around movement before it should? Any thoughts on how to fix?

winged badger Oct 23, 2020, 7:54 AM

#

@barren warren why do they have pawns before they finished connecting? whats the connection method?

barren warren Oct 23, 2020, 8:01 AM

#

@winged badger just using a normal 'Open Level' node with ip:port,

winged badger Oct 23, 2020, 8:02 AM

#

they can't have anything moving around or replicating before they are fully loaded

#

got any pre-placed or client spawned ACharacters?

thin stratus Oct 23, 2020, 8:07 AM

#

Weren't non-possessed Characters stopped from updating CMC?

#

Valorant found that out the hard way :D

#

One of the characters they have can throw a Camera which is in itself just a hero (ACharacter) (it was even able to get a weapon if you drop it on it, which was a bug of course).
Another character can spawn an Ice-like wall. If the Camera guy was standing on that and went into the camera (which changed possessed pawn), and the ice-like wall breaks down, the camera guy was standing in air :D

winged badger Oct 23, 2020, 8:11 AM

#

what is this when that breakpoint hits @barren warren ?

sharp plover Oct 23, 2020, 8:57 AM

#

Are there any examples or documentation on handling animation reconciliation with replication? Say I have variables set to be replicated for the owner but I only want to correct if the state is invalid for that given tick

#

Seems to cause a lot of jitter

empty axle Oct 23, 2020, 9:25 AM

#

Is replicated TArray order guaranteed to be the same on the server and client?

bitter oriole Oct 23, 2020, 9:26 AM

#

It would be surprising if not

#

The order of an array is clearly vital

twin juniper Oct 23, 2020, 9:32 AM

#

If I were to use an FName in an RPC, what format would it be replicated as? The same hash type used in the engine, or a string type of some kind?

#

Also, would the hashing be stable on both machines?

chrome bay Oct 23, 2020, 9:47 AM

#

@empty axle yes

winged badger Oct 23, 2020, 10:05 AM

#

@twin juniper as string and no i don't think so

#

one way to get around that is to use a FGameplayTag instead

#

those are replicated as integers

#

but you can't invent new gameplay tags at runtime

#

i mean hashing should be stable, but there is no way to reconstruct the name from a hash

lost fulcrum Oct 23, 2020, 10:37 AM

#

How should I implement replication for variables that are predicted on clientside?

For example I have a variable for ammo in my weapon class. This variable is replicated because server should tell how much bullets player has. However when player is shooting, firing state machine (e.g. delay, trace line, bullet consumption) happens on both server and client sides. This is needed to make game more responsive for client. But replicating ammo variable from server to client while firing breaks this sequence on client side because of outdated values from server.

twin juniper Oct 23, 2020, 10:40 AM

#

@winged badger Thanks, good to know.

humble comet Oct 23, 2020, 10:50 AM

#

Hey guys, Apple review team cannot connect to server, after getting logs from device we can see that handshake timeouts, and error is as following :

LogSockets: Warning: Could not serialize ///.compute.amazonaws.com, got error code SE_EINVAL [5]```

#

has anyone had the same issue, and what to do in that situation

#

Also seems like even on successful connections we're having this warning, what does that mean?:
LogSockets: Warning: Could not serialize ////.eu-central-1.compute.amazonaws.com, got error code SE_NO_ERROR [0]

lost fulcrum Oct 23, 2020, 11:21 AM

#

is there a network counter structure that can be increased in both server or client predicted events and simply checked during manual replication ?

chrome bay Oct 23, 2020, 11:33 AM

#

there is not no

#

prediction is complicated, usually you have to do something bespoke for whatever you're predicting

lost fulcrum Oct 23, 2020, 11:44 AM

#

thanks

cloud widget Oct 23, 2020, 12:17 PM

#

Hi guys! I'm pretty new to replication and I'm trying to create a multiplayer game with a dedicated server (source build). I'm having trouble spawning my pawns though, with only clients 2, 3 and 4 actually possessing, while client 1 is in limbo. There are 4 player starts tagged 0, 1, 2, 3:
https://i.gyazo.com/9cc6163284b6b98eac8ee927932a0075.jpg

This is my gamemode blueprint, pretty simple stuff so far:
https://gyazo.com/42874f9ae99de0e6e322e0073f0b2a60

Gyazo

#

(Player_Controller is derived from PlayerController, because I decided to be confusing...)

soft girder Oct 23, 2020, 12:19 PM

#

i managed to mess every gun i had up

#

somehow spawning the weapon and attaching to mesh socket has fucked my shit up real bad

#

guns refuse to fire. children not calling multicast

#

server can see the shot now after a rearrange of some nodes

#

why these children acting up tho?

#

weld simulated bodies shouldnt have been that big of a change

vivid prawn Oct 23, 2020, 12:26 PM

#

Can anyone explain to me why am I getting jitter when i scale up the character in multiplayer?

📎 2020-10-23_20-21-12.mkv

soft girder Oct 23, 2020, 12:31 PM

#

is this because i made an edit to the parent class?

#

i dont understand why this isnt working cant reproduce on a copy

vivid prawn Oct 23, 2020, 12:33 PM

#

from where you did spawn the gun?

#

if you spawn the gun in the client side, server doesn't know it existence, so it wont show up.

soft girder Oct 23, 2020, 12:35 PM

#

it spawns on all

#

it worked right before i made an edit to the parent

#

now none of the multicast functions work

#

im gonna try and reproduce the issue again real quick just to make sure

vivid prawn Oct 23, 2020, 12:58 PM

#

Anyone can explain why this happening? or is this a bug?

📎 Character_Jitter.mp4

cloud widget Oct 23, 2020, 1:03 PM

#

Are you referring to the jerky run?

#

This guy covers that issue in detail: https://www.youtube.com/watch?v=whow14uFWtw

YouTube

BRY

🎮 UE4 Replication - Part 2: Game Instances - Unreal Engine

🎮 Unreal Engine Replication Series - Part 2: Game Instances

In part 2 of our replication tutorial series, we are introduced to the idea of game instances - not to be confused with the "Game Instance" class that's built in Unreal but the idea of multiple instances of the game ...

▶ Play video

soft girder Oct 23, 2020, 1:04 PM

#

hes the same speed right?

#

wait replicate movement ticked?

vivid prawn Oct 23, 2020, 1:09 PM

#

it's default character i don't need to replicate it

#

it is already replicated in the background

#

I made new project and scale the character in the Character Blueprint, it start to jitter

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if i scale it back to 1, it is perfectly fine

soft girder Oct 23, 2020, 1:11 PM

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?

sleek elk Oct 23, 2020, 1:12 PM

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My Answerhub question is still awaiting mod approval. But like yesterday, if someone here who a a really, really good understanding of networking and have idea what makes a "playerstate" not available after ServerTravel, would be really nice to get some help. I am stuck at the moment.

Problem again... sometimes, more often playing on real steam env after publish, the client after "ServerTravel" have no valid PlayerState. I can check it "valid" and it is not valid. I also see that begin play of playerstate is not executed (of course because client has not playerstate).
facts: Happens after servertravel, using seamless travel on. Happens sometimes, not every time. Happens not or seldom on "local stand alone games", but much more frequent in real steam enviroment.
PlayerState valid checks shows that it is still not valid after some time. So it's not a problem that to need some frames or some seconds after servertravel is finished.

chrome bay Oct 23, 2020, 1:15 PM

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Even after Seamless Travel you get a new player state actor, the actor itself is not preserved, only certain properties.

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So the old one will be deleted and become invalid, and the new one will take some time to replicate.

sleek elk Oct 23, 2020, 1:18 PM

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thanks @chrome bay, that's also the thing I now and that's situation my BP is expacting it.
As I said.... problem is, sometime the playerstate is not there. Even after 15 Seconds waiting after begin play, a "valid" check on player state message "not valid". And I do not get the point.
But yes, all what you said is right and when it would work like this, then I had to have a valid playerstate at least after some frame (or at least after some seconds).

chrome bay Oct 23, 2020, 1:18 PM

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Where are you trying to access it from?

sleek elk Oct 23, 2020, 1:19 PM

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PlayerController

chrome bay Oct 23, 2020, 1:19 PM

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And you are testing outside of editor yes? Seamless travel doesn't work in editor

sleek elk Oct 23, 2020, 1:19 PM

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Of course...

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facts again .... Happens sometimes, not every time. Happens not or seldom on "local stand alone games", but much more frequent in real steam enviroment.

chrome bay Oct 23, 2020, 1:20 PM

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Shouldn't be any issue then, the PS should be received within the first few seconds usually

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There's no guarantee it'll arrive before BeginPlay etc. though

soft girder Oct 23, 2020, 1:21 PM

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can he do it on arrival?

chrome bay Oct 23, 2020, 1:21 PM

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nope

rich ridge Oct 23, 2020, 1:21 PM

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And you are testing outside of editor yes? Seamless travel doesn't work in editor
@chrome bay if I run the editor as client and dedicated server in different process.. then seamless travel works.

chrome bay Oct 23, 2020, 1:22 PM

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Yeah that's true, non-single process should work

soft girder Oct 23, 2020, 1:22 PM

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does anyone know why a parent bp's multi cast function would stop being multicast in child? i used a print string and it doesnt have the server or client tag

sleek elk Oct 23, 2020, 1:22 PM

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I know, that's because I check frequently for player state. If you want to have, I can send you a screenshot of my answerhub entry per message. To have all informations. Also with links to discussions which are similar.

chrome bay Oct 23, 2020, 1:23 PM

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Don't forget the PlayerController actor will also be a new actor

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I.e, not the same actor from the previous level

sleek elk Oct 23, 2020, 1:24 PM

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yes, I know also that. But I simply check at begin play of new playercontroller after srvertravel, and start checking playerstates there. Most time it works, epsecially on stand alone games on my local machine. So it can't be general wronng, then it would not work.
Also it only happens on clients sside

chrome bay Oct 23, 2020, 1:24 PM

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Yeah that's the problem - you're checking on BeginPlay

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There's no guarantee the player state will be valid on BeginPlay

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Sometimes it might arrive after, sometimes before

sleek elk Oct 23, 2020, 1:25 PM

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I quote my self again... "As I said.... problem is, sometime the playerstate is not there. Even** after 15 Seconds waiting after begin play**, a "valid" check on player state message "not valid". And I do not get the point."

chrome bay Oct 23, 2020, 1:25 PM

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Controllers have OnRep_PlayerState you can override in C++ which will be called when the player state is replicated

sleek elk Oct 23, 2020, 1:29 PM

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It's not about, that I do not get the point that it is replicated, because acces it too early. It's defininetly about "it's not replicated" at all. As I said, when problem occur I can wait 15 seconds, still not valid. It's clearly shown in log. Also "begin play" of my playerstate has some debug log, also this is not firing on clients when the problem occur. So the player state seems to be simply not generates/replicated on client.

chrome bay Oct 23, 2020, 1:30 PM

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Are you actually sure it's not being replicated though?

rich ridge Oct 23, 2020, 1:30 PM

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Not true..
If server spawning a player it is bound to have a player state

chrome bay Oct 23, 2020, 1:30 PM

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Replicated actor spawning should be "reliable", so you will receive it eventually. If not, the client will get kicked IIRC.

rich ridge Oct 23, 2020, 1:30 PM

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The default PlayerState or your defined one

sleek elk Oct 23, 2020, 1:31 PM

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Are you actually sure it's not being replicated though?
@chrome bay At least that's why I am here. It very seems for me, it'S "sometimes" not replicated at all.

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The default PlayerState or your defined one
@rich ridge self defined one

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Also with some debug log at begin play to see if it is spawned

rich ridge Oct 23, 2020, 1:32 PM

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Override InitPlayer function of GameMode where player State is created and assigned to player controller

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And put log and see if it's fine or not

sleek elk Oct 23, 2020, 1:33 PM

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oh, that sounds good, do I have to dig deep to C++ for it?

chrome bay Oct 23, 2020, 1:33 PM

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Interesringly it looks like there are some known issues on UDN regarding actor replication after seamless travel

rich ridge Oct 23, 2020, 1:33 PM

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If things not working I override the default implementation and see things what went wrong

chrome bay Oct 23, 2020, 1:34 PM

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What engine version are you on btw?

sleek elk Oct 23, 2020, 1:34 PM

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4.25.1

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Interesringly it looks like there are some known issues on UDN regarding actor replication after seamless travel
@chrome bay Do you have a link to it or where I can find something about it?

chrome bay Oct 23, 2020, 1:36 PM

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I can only link you to UDN if you have access to it. However I would start by checking the client/server logs to see if there are any issues reported there when it occurs.

sleek elk Oct 23, 2020, 1:36 PM

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If things not working I override the default implementation and see things what went wrong
@rich ridge Yes, that's really sound like a good idea. But I am very limited at C++ and I think I have to overwrite it in c++ in game mode right

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However I would start by checking the client/server logs to see if there are any issues reported there when it occurs.
@chrome bay Of course, I study logs for hours... better saying for days now. Trying different things. Different gamde modes. Same Gamemoes... still hapens time to time

rich ridge Oct 23, 2020, 1:37 PM

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Or else you can debug your server process directly in visual studio

chrome bay Oct 23, 2020, 1:37 PM

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Look for stuff like this in the log: LogNetTraffic: Error: UActorChannel::ProcessBunch: New actor channel received non-open packet

rich ridge Oct 23, 2020, 1:37 PM

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No need to put custom logs..

chrome bay Oct 23, 2020, 1:38 PM

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Or UActorChannel::ReceivedBunch: Received a MustBeMappedGUID that is not registered.

sleek elk Oct 23, 2020, 1:38 PM

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ok, one moment, I search

chrome bay Oct 23, 2020, 1:38 PM

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You need to at least look through the server and client logs, but i would first be absolutely sure the player state isn't spawning

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Also try setting LogNetPackageMap to VeryVerbose

rich ridge Oct 23, 2020, 1:39 PM

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How can that be possible.

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Player state is must?

chrome bay Oct 23, 2020, 1:39 PM

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Unless there's a general bug for sure, judging by some reports it looks like this isn't the first case of this happening

rich ridge Oct 23, 2020, 1:40 PM

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@sleek elk Is your player AI controlled?

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By default ai controlled don't have player state

sleek elk Oct 23, 2020, 1:40 PM

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Or else you can debug your server process directly in visual studio
@rich ridge Yes, also a very good Idea. But I have to some no knowledge here. Also problem is it happens most of the time after steam publish in real steam env. Even if the cooked/build sourcs playing with 2 PCs its most of the time not happnning But yes, if I would know what to to, debug server side would be a good idea. Perhaps I have to dig into it to get the problem.

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of course not, it's a player 😉

vivid prawn Oct 23, 2020, 1:41 PM

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@chrome bay can you take a look at this.

Anyone can explain why this happening? or is this a bug?
@vivid prawn

chrome bay Oct 23, 2020, 1:42 PM

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no idea @vivid prawn

vivid prawn Oct 23, 2020, 1:42 PM

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oh well

chrome bay Oct 23, 2020, 1:42 PM

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If you want to change the characters' size it's better to change the actual capsule size I suspect

vivid prawn Oct 23, 2020, 1:43 PM

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yeah, that's what i did

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it's so strange

sleek elk Oct 23, 2020, 1:43 PM

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You need to at least look through the server and client logs, but i would first be absolutely sure the player state isn't spawning
@chrome bay Talking to you guys here I notice I need to learn much more. Do you have any link how to "Also try setting LogNetPackageMap to VeryVerbos" is done

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or momemnt, I will start google

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is that what i have to do?
https://answers.unrealengine.com/questions/50582/how-do-i-show-log-entries-with-log-verbosity.html
[Core.Log]
LogActor=VeryVerbose
LogNetPackageMap=VeryVerbose
put into DefaultEngine.ini
right?

chrome bay Oct 23, 2020, 1:49 PM

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yeah that's it

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The logging might be insane, but it will contain more detail

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@vivid prawn you changed the scale but not the capsule radius/height

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CMC probably doesn't deal with scale changes very well

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not sure though

sleek elk Oct 23, 2020, 1:51 PM

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ok... I make the change to ini, package, upload to steam, do a check again, check my playerstate begin play debug log again if occurs on client when bug occur, and then come back to you ...
And of coruse i search the log for...
log: LogNetTraffic: Error: UActorChannel::ProcessBunch: New actor channel received non-open packet
UActorChannel::ReceivedBunch: Received a MustBeMappedGUID that is not registered.

vivid prawn Oct 23, 2020, 1:53 PM

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hmm... but then i do need to scale everything up, isn't the whole point of scale?

chrome bay Oct 23, 2020, 1:54 PM

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@sleek elk Yeah I would have a flick through the log looking for general errors first. I would also add some debug messaging to your player state, so that you know for certain whether it is/isn't replicated

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If in doubt, add shitloads of logging.

vivid prawn Oct 23, 2020, 1:57 PM

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the thing is the capsule and all other components are perfectly fine, except the Skeleton Mesh

chrome bay Oct 23, 2020, 1:58 PM

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could be the network smoothing doesn't work with scale

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You could try disabling smoothing on the CMC and see if it goes away

sleek elk Oct 23, 2020, 2:00 PM

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@sleek elk I would also add some debug messaging to your player state, so that you know for certain whether it is/isn't replicated
@chrome bay I have already, I simply make logging at begin play in player state. I see it this is working because on server side the log appears fine. It prints 3 times some text. Beside this, Playercontroller checks 3 times for valid playertimes also on begin play, everytime with 2 seconds dealy. As I see all logs appear on server side, I can be sure there is no error in looging iteself

vivid prawn Oct 23, 2020, 2:00 PM

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NICE, that works perfectly

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probably if i want it to be smooth I've to adjust the smooth distance

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but Thanks a lot 🙏 , I have been pulling my hair for past few days!