multiplayer

[fossil spoke]

Also probably a good idea to reduce the NetUpdateFrequency to a value that you are comfortable with.

The lower the better

[lucid badger]

Yeah this can be super low

[fossil spoke]

Well it cant

[lucid badger]

Even very brief desync wouldn't be a problem I Just don't want items permanently diverging

I get you if it's too low it never fires

I just meant, as low as it can go

[fossil spoke]

You can use things like the significance manager to handle adjusting the update frequency for further away ones

You might want ones really close to the player to have a very high rate so they appear smoother

And ones far away can be a lower rate because you are less likely to notice the hitching

[lucid badger]

Slapping this in broke it now the items are just stuck in the original spawn position on client

Is that the wrong way to disable phys?

[dire cradle]

It's fine, but probably better to keep it disabled by default and activate it if authority instead of vice-versa

[lucid badger]

It seems that with that off, it's no longer syncing position

or rotation

[dire cradle]

is it disabled by default on the mesh?

[lucid badger]

I have it set enabled on the mesh, I can try inverting it, you think that'll fix?

Enable on auth

[dire cradle]

Yes

[lucid badger]

that did fix it

Why ??

[dire cradle]

Because before it wasn't being turned off on clients

You were activating the physics on the server on a mesh that has physics already enabled by default. And not turning it off on clients either

[lucid badger]

What? No look at this again

On false, no authority, it sets it false

Or am I misreading

[dire cradle]

I was refeering to this

Assuming you did it

[lucid badger]

Starting True and Setting False on No Authority seems to me like it should do the same as Starting False and SEtting True on Authority, but it does not

Perhaps just to do with the timing of beginplay I guess

Probably if I did it in constructor then it'd be the same

[dire cradle]

I totally missed the message, just saw the screenshot and the question about if it's correct my bad

Thought it worked

[lucid badger]

All good appreciate the help

[dire cradle]

I did some testing

And simply doing this works, with Actor and Movement replication enabled

[lucid badger]

Yes

I said it works that way I was just curious why it doesn't work the other way around. I.e. on by default and disable when remote. But I'd bet it's just the timing of begin play

[dire cradle]

Oh then it's fine, it's definitely about the timing

[lucid badger]

makes sense

[dire cradle]

That timing issue probably won't happen inside the construction script, might want to use that instead.

[lucid badger]

No need. Makes more sense this way anyways. enable once for auth instead of disable multiple times on remotes

I feel like this is a MP question, since it's a MP reason why I want to do it

Is there a way to crank graphics waaaaaay down for Play in Editor mode, for testing purposes? with 4 players on one PC it gets a little slow

I'm made to understand that Run Under One Process is much faster but when I do that, my shit breaks, and the tooltip suggests it is bug-prone

[sweet sage]

https://github.com/dyanikoglu/ALS-Community/issues/41

I`m having this same issue but if i disable root motion on proxies the animation quality of motion is way lower. What is the best way to fix? is it even fixable?

Do anyone have something like this?

When playing root motion montages and colliding against moving objects, they are on different positions for each machine and replicated proxies sometimes don`t collide, etc

[prime stump]

anyone here familiar with playfab?

[dire cradle]

I used it once

[prime stump]

were having a problem with the server allowing connections... its probably something stupid

like i get the servers up and running and it gives the clients the ip/port to connect to...but its just not listening on those ports so the clients time out

[dire cradle]

Without playfab does the server work correctly?

[prime stump]

yes

[dire cradle]

Are you using the container mode?

[prime stump]

yeah

[dire cradle]

I didn't use the container mode but I think it requires some verification of some sorts if I'm remembering correctly.

Disable the container mode and try that way and see it it works

[prime stump]

ok stdby

yeah...here is the issue...i could never get the process mode to work, servers kept failing to deploy...also with process mode we can only run 1 server per VM which is not ideal...i can try again as a test but we really want containers for scalability.

[dire cradle]

https://learn.microsoft.com/en-us/gaming/playfab/features/multiplayer/servers/locally-debugging-game-servers-and-integration-with-playfab#verifying-containerization
Take a look at this

It's the containerazation thingy, I don't know how it works but it's probably relevant

[spice gorge]

I'm having an issue with properly connecting a client to a server since I added seamless travel over Steam.

In the OnlineSubsytem the listen server player starts a session upon the complete delegate firing it calls

GetWorld()->ServerTravel("/Game/Maps/Home?Listen", true, false);

The client opens up their online menu and sees a broadcast of the server game and can hit join.
Upon the join delegate firing it calls TryTravelToCurrentSession()

PlayerController->ClientTravel(ConnectString, TRAVEL_Absolute);

Here's the weirdness:

• The client goes nowhere. They just sit in their own level and don't travel to the host map
• If the host changes level (via a trigger) which uses the Blueprint OpenLevel function with the map name ?Listen in the options. The client gets pulled into the new level.
• If the client leaves the server and reconnects it all works fine and they automatically travel to the server map
• If the host ends the server and starts a new one the problem begins all over again

The usual stuff for seamless travel is there. The bool is enabled in the GameMode and the transition map is set. Which I guess is a given because once it works it works. It's just that initial map load that's causing the problems.

[dire cradle]

When you start the server use open level instead of server travel

[spice gorge]

I did wonder if that might be the way to go. I'll give it a shot.

[dire cradle]

As far as I know Server Travel is to carry players that are already existing in the scene to the target level.
If they never really joined then there's no one to pull, open level ensures clients will be pulled to the server scene as soon as they join.

[spice gorge]

Well dang, that seems to have done the trick!
Thanks for that. Saved me spending the rest of the night prodding at random settings and packaging builds over and over.

[torpid lantern]

Does multicast only go to relevant actors in replication range, or all connected clients? How careful do I need to be with my multicasts?

[dire cradle]

If the event is ticked reliable then relevancy is is irrelevant, if unreliable it will check for relevancy and decide to update or not.

[hollow eagle]

That's... wrong. RPCs can't be executed on actors that literally do not exist on a client.

If an actor isn't relevant to a client and the client does not know anything about it, any RPC on that actor sent to that client is going to be dropped.

Apparently the engine is/was dumb about this.

And immediately opens a new actor channel for actors that aren't replicating

jfc

[dire cradle]

Yeah relevancy doesn't mean the actor doesn't exist

[hollow eagle]

It does for dynamically spawned actors

(assuming the client is up to date)

but at least in some situations the engine will apparently replicate the actor anyway. And then immediately remove it from relevancy again.

just one more reason reliable multicasts should be avoided in almost all situations

ah, turns out this behavior is actually controlled by a (default-on) cvar and it requires that there already be an actor channel. Still something to be avoided, but not quite as ridiculous behavior as I assumed.

[toxic falcon]

When you make the build and upload, did you configure the right port number for the first Entry?

[lost tinsel]

how unreliable is it when you put "unreliable"? it's like, if the bandwidth is saturated then it won't execute the rpc?

[chrome bay]

and won't be resent if it fails to arrive

[twin juniper]

What does normal video games use? Local Predicted or Server Initiated?

Like Fortnite or sth.

[chrome bay]

Depends

Also if I didn't know that was a very specific setting in an ability, I'd have no idea what you were asking there

[sharp vigil]

How does Iris even work? Do I just enable it and call it a day? lol I'm reading the docs right now on it and that's how it sounds in a nutshell to me?

[meager spade]

Iris is very experimental

Most stuff should work either minimal ini file setup

But not recommended atm

Unless you have a reason for iris, I would ignore it

[lost tinsel]

much like udp and tcp?

[chrome bay]

All net traffic is UDP in Unreal, but essentially yes

it's 'Fire and Forget'

[lost tinsel]

cool, ty 🙂

[crude quail]

Since it seems like subsystems in unreal cannot do server rpcs, how would you typically elevate a subsystem request to the server? It's awkward to create a subsystem and then a client object who's only job is to listen to the SS and simply RPC for it

[chrome bay]

use an actor

SuUbsystem spawns an actor (server side), RPC's go through that

[crude quail]

yeah so the process has to be Initiator->Subsystem->Client Object RPC'

I cannot do better than three steps of indirection to just send a single rpc?

[stoic lake]

Good to hear!

[gloomy tiger]

Hey, a few questions about shooter + multiplayer in a scenario I don't care about cheaters (its coop), am using GAS and it's a third person shooter where the position of the character doesn't necessarily reflect where they're aiming.

1. How would you deal with shooting? Client sends to server an RPC informing it has hit X, Y and Z characters? Or you go full predicted by the server and only informs character X is shooting and each instance simulates it?
2. AI life - do you replicate it to everybody? I believe, in general, it's not a good practice but would like to hear your experiences.
3. When hitting walls, for example, I want to spawn a particle. How to go about it? Client -> Server RPC -> Multicast? (in our context, hitting walls don't break them etc, it does nothing, its pure aesthetics)

[chrome bay]

Well it can't be a Client RPC anyway, unless you're spawning multiple actors (one owned by every player)

Only Actors can send RPCs, so it has to go to an actor eventually

[chrome bay]

Shoot, send the aim direction + origin to Server. Server checks and shoots too, or rejects. Replicate some minimal information about the shot to all clients so they can simulate it locally too. Really depends on the type of game, the weapon, the projectile etc.

There's no catch-all solution

The "modern" way to notify other users is probably via a Gameplay Cue, but I prefer a simple counter. https://jambax.co.uk/better-burst-counters/

[gloomy tiger]

Shoot, send the aim direction + origin to Server. Server checks and shoots too, or rejects. Replicate some minimal information about the shot to all clients so they can simulate it locally too. Really depends on the type of game, the weapon, the projectile etc.

That's good insight. No projectile - raycast only. Weapon: automatic.

[chrome bay]

Hits are similar. Client tells the Server they hit something, server either agrees or disagrees. Or you do full Server-side hit detection.

ShooterGame is old but has a reasonable implementation

Projectiles are SSHD, Raycasts are CSHD

[gloomy tiger]

SSHD and CSHD 🤔

[chrome bay]

Server-SIde Hit Detection vs Client SIde Hit Detection

[gloomy tiger]

Or you do full Server-side hit detection.

This is probably... the smoothest, network-wise? 🤔

[chrome bay]

SSHD means you tell the server you shot, and it does everything else. Players have to account for latency

CSHD means players generally don't have to account for latency but is far more complex to implement

Since ofc, the Server needs to validate everything the client sends, and you're dealing with different frames of reference when validating the shots

[sharp vigil]

Is this kosher? I'm setting a struct of resources for teams on my gamestate but when I'm retrieving the values I don't use an RPC since the gamestate is automatically replicated. Should I be sending requests to the server to retrieve the values from the server gamestate?

Edit:After reading this.. the server should be the source of truth lol

[solar stirrup]

I do wonder if it'd be sane for shots to start off as raycasts, and if they don't hit anything, they get turned into projectiles by the server for them to travel

[chrome bay]

IIRC insurgency does that, raycasts for the first 50M or so then projectiles to make it more 'responsive'

Seem to remember hearing something

[sweet sage]

Are there any events for when dormant actor wakes up and sleep?

[gloomy tiger]

by projectiles you literally mean an AActor?

or particles, etc?

bc I mean, probably it invovles a sh-t ton of techniques to make it performant - I bet it wouldn't be a mere SpawnActorOfClass AProjectile and les go baby

Pooling and all

[ashen scroll]

like a pawn?

[sweet sage]

Yes

[ashen scroll]

OnPossesed?

[sweet sage]

A mob/monster

not player

[ashen scroll]

aa

still

it works for controllers

but i probably dont know what you're talking about

so i wont comment further

[sweet sage]

https://docs.unrealengine.com/5.3/en-US/actor-network-dormancy-in-unreal-engine/

this

[ashen scroll]

oh i see

yeah i have no idea honestly, probably shouldnt have responded lol

[forest bolt]

Has anyone ever experienced crashes with GetPlayerControllerFromNetId ? For some reason my UniqueNetIds are CRASHING when checking the .IsValid().

[tardy fossil]

It’s a little surprising to me UE doesn’t have a in house solution for projectile prediction like they have with character movement. I guess that’s a lot harder to make it flexible enough to work with everything

[forest bolt]

they do have the projectile movement and the other projectile interpolation feature for fake projectiles

[forest bolt]

FUniqueNetIdWrapper::IsValid() Line 592 C++

[flat night]

So I did the whole checking the pawn, but I had the same issue - the pawns get validated very quickly, while the Client viewpoint is still in the middle of the world, until it starts using the proper camera. Do you have one camera and how do you assign it to players?

And this is my questions to others I guess as well, if you have 1 camera in the scene that you want all players to use on joining the game, how do you do that? I currently have one camera in the level and in the gamemode I use GetAllActorsOf and set it to a var that later on I use NewPlayer->SetViewTarget(SharedCameraActor); in HandleStartingNewPlayer_Implementation but that is quite slow apparently. And I have no idea how to make a callback so that I get a notification when the Client has started using the one camera in the level so I can start the game.

[rich dune]

Hey,

Im running into an issue with vehicles and desync. I can attach my player to the vehicle and drive around with no problems. But as soon as a detatch the player from the car and take ofer the character models control again, it's no longer synced and I'm warping and teleporting around. any ideas why?

[mystic estuary]

Do you get any warnings in the log?

Most likely CMC is telling you something

[mystic estuary]

HandleStartingNewPlayer_Implementation but that is quite slow apparently.
What do you mean by that?

[rich dune]

did thest it with a dev build so far

[flat night]

Super::HandleStartingNewPlayer_Implementation(NewPlayer);
    
    PlayersInGame.Add(NewPlayer);
    
    if (SharedCameraActor)
    {
        NewPlayer->SetViewTarget(SharedCameraActor);
       }```

this is what I do to set a new player to the camera I have in the level. And I mean that the process of the player joining and starting to use that camera is quite slow. It's not like the player joins and they immediately start using that camera (which is static by the way)

[mystic estuary]

You can wrap your code using doing it like that instead
```cpp
my awesome code
```
It'll format it in a fancy way

[flat night]

thanks!

[mystic estuary]

Do you mean that you have to wait some time before it happens regardless? After a player joins, how long do you need to wait before it calls the HandleStartingNewPlayer() and before they actually start using the camera?

[mystic estuary]

...and? Does the log contain any warning about character movement component?

[flat night]

My assumption is that the calling happens immediately, cause I have some other code afterwards that fires. But the Client looking for that camera and starting to use it takes time
And if you ask how much time....idk, I have to time it, but I wouldn't know if it's always the same. If it is, then it would be a simple timer to do, but I can't rely on such an arbitrary method

[mystic estuary]

If it calls the HandleStartingNewPlayer() immediately, does it mean that it processes the NewPlayer->SetViewTarget(SharedCameraActor); for long time? You don't have to measure it precisely. Is it 5, 10, 15 seconds? I'm asking just to get an idea

[flat night]

5

just timed it

[mystic estuary]

And for these 5 seconds, what does the new player see?

[rich dune]

Once I build a new version and tested it I can say more. The issue dies not appear while playing in editor all as clients

[flat night]

they are just in the origin. I can see on the Server that the player has been spawned

[mystic estuary]

Can you try to step through the APlayerCameraManager::SetViewTarget()? It looks like that they set some timers internally for blending purposes. It might be something to do with that

step through with debugger upon new player login*

[solar stirrup]

thanks

Insurgency's guns do feel pretty damn good

[flat night]

what am I looking for exactly?

[mystic estuary]

You're looking for the reason it delays the function. As I said, it looks like it's setting some timers inside. Take a look at the timers duration it sets, and compare it to the 5 seconds delay you're getting.

[flat night]

is that it's going to say somewhere in the debugger here that value?

[mystic estuary]

Step into the function, and get to the PlayerCameraManager.cpp line 156, and see whether the delay is anything like 5

[flat night]

adding a breakpoint on line 156 doesn't make it stop so I can see whether it's giving any value

[mystic estuary]

Can you try to put a breakpoint in void APlayerController::ClientSetViewTarget_Implementation( AActor* A, FViewTargetTransitionParams TransitionParams ) to see whether it's called immediately after the HandleStartingNewPlayer(), or perhaps it's called after 5~ seconds after that was the case?

[flat night]

seems to be immediately

I wasn't using that function honestly until now

just added it for testing

[mystic estuary]

You don't have to use it manually, it's called in the SetViewTarget() at some point

Either way, does the ClientSetViewTarget_Implementation() call the inner SetViewTarget()?

[flat night]

seems like it

[mystic estuary]

Does it get a valid NewTarget (the first argument)?

What does it do inside the SetViewTarget() when it's client-side?

Also, a quick tip. In order to know whether you're client-side or server-side you can use the {,,UnrealEditor-Engine.dll}::GPlayInEditorContextString in your debugger. Adding it to watch will tell you that interesting information anytime you open up the debugger

[flat night]

you mean like this?

[mystic estuary]

Yeah, like this. It should've worked 🤔

btw, do you have the debug symbols downloaded? Their absence might be the reason it doesn't find anything

[flat night]

maybe not, I will need to have a look

[mystic estuary]

If you're unsure, you most likely don't. That's fine, but it's heavily encouraged to download them if you're going to work a lot with C++ in UE, as it gives a lot of extra debug information. The only issue is that they are 50GB or something

[flat night]

okay, I will get them

[flat night]

but I am not sure how to check this
maybe I need those symbols you mentioned, I am not sure what do be looking for
I apologize, I am still fairly new to programming, so I have not learnt these ways for pinpointing exact issues

[mystic estuary]

That's fine. To see whether the NewTarget is valid simply look at its value in this tab. When it has a name and properties in 99% of cases it's going to be valid.

To check what it does inside SetViewTarget() you have to step into the function using F11 (or the button above the properties in the aforementioned tab), but I'm unsure whether you need the debug symbols. You actually might need them since that's kind of the point of downloading them. Since I haven't worked without them in a while I cannot be 100% sure about it.

I guess download them, and in mean while perhaps look at how other people switch the camera, if you haven't already. I personally haven't worked with cameras really, so I only have ideas on how things should work. 😄

[chrome bay]

Not neccesarily actor based, just an projectile of some kind. Most large scale games are gonna be using some ECS approach or something similar

[flat night]

there's very little info on it, I tried googling it
And I can see there's a FViewTargetTransitionParams that has a BlendTime that is used for the Timer, but I think that one is set to 0 by default
And even then just doing a TransitionParams.Blendtime = 0.f doesn't really change anything

[mystic estuary]

I see. I guess we can go the other way around: instead of getting to the problem from its origin, we can try to get to it from the very end -- from the function that actually makes the player see using the camera you're setting. The only question is what this function is. After that it's just the matter of going down the call chain, and see what delays a certain function in all that chain. With that knowledge most likely we can find either a workaround or a fix for that.

[flat night]

{
    K2_OnBecomeViewTarget(PC);
}```
this is the end one and I cannot go anywhere else.
I am not sure exactly what's going on, I do not see any real timers, and if the timer is for the blend, I tried setting it to 0 but nothing happened

I mean, worst case scenario, if it's always 5 seconds, which I cannot really pinpoint until I test a bit more with others, I could put a timer to start the game after those 5 seconds and just have a loading screen in place...not a great solution, but I don't mind ultimately if it really is concise

[mystic estuary]

Once you download the debug symbols you can try to go down the call chain in the stack call, and see what's the very first function that's called with some delay. After you find it, you'll know what function makes the delay -- the one that is just before the one that is called after some delay.

Practically you need to put a breakpoint in the BecomeViewTarget(), and look at the bottom left angle, there you'll have all the functions that took place before calling this one. Look for those that are relevant to the camera, and see whether anything is called by a timer manager, i.e. something has asked to delay that function

[flat night]

Thanks Tony, I will have a look later, I downloaded the symbols, but need some break, cause my mind is tired by this point 😆
I will message later with the results

[mystic estuary]

Sure, take a break. Debugging such issues is always a pain as you have to understand a lot of someone else's code 😄

[jade patrol]

how do you pause a multiplayer game in listen server? I want to pause a game and show a popup with some data from the server. But when the game is pause the multicast that tells the clients to open the popup is never triggered because the game is paused :D. So how do you pause the game but still allow clients to receive data and do ui stuff?

[chrome bay]

pausing the game shouldn't stop network traffic. It just stops level ticking essentially

[jade patrol]

oh I see, it needs to replicate with Reliable checkbox on

[dark edge]

Sounds like you're multicasting state to me.

What are you actually trying to do?

[jade patrol]

I stumbled upon another issue, the player state does not replicate properties while game is paused?

Basically what I want to do is to pause the game and show same menu to players where they can choose a random ability from a list (like a vampire survivals but multiplayer) . So I'm generating the abilities on the server for all the players and save it in player state (each player can choose from their own ability list and can see what other players are choosing). This works fine for the server but the clients will not update the list while the game is paused :/

[nocturne quail]

add item to player inventory should ever be called by client?

[solar stirrup]

Probably not

[nocturne quail]

so in this situation can we call server event from UI?
lets take a look at an Accessory item attach to AK47 and i drag it and drop it in my inventory from UI and the UI is not available on server!

[solar stirrup]

I have a component on the player controller that holds the RPCs for inventory actions in my case

You'll need something similar

[nocturne quail]

Ok thanks

[bright summit]

silly question but, how can I check if my footsteps on multiplayer are working? When I focus on another client the previous one is muted

[spiral crystal]

Yeah i'm doing the same. UI is calling something like "Move Item" (Server Reliable) on the player controller, server is executing MoveItem_Implementation and then calling a MoveItemExecuted (Client) on the player controller which will then update the UI.
If it needs to be fast you can already update the UI clientside and then just correct if the server response is received (or don't send a response at all if everything is ok)

[spiral crystal]

for standalone https://forums.unrealengine.com/t/how-can-i-keep-audio-from-losing-focus-when-not-in-editor/287745/6

for editor

[bright summit]

thx

[bright summit]

dosent work

[spiral crystal]

Damn 😄

maybe also try the standalone thing

[bright summit]

need this thing in editor

[spiral crystal]

as a quick hack maybe just add a +1 velocity in the move function so the char is always walking?

[twin juniper]

Or a more simple question is: How do i check in code if the current blueprint in which the code is running is the real player (the player that is controlling the machine) or not?

Maybe, if there is something like get current player's index? Because i know the real player index is always 0 so can check with that?

[dark edge]

is locally controlled

[twin juniper]

Thanks. Very helpful.

[quaint roost]

would anyone be interested in discussing a latency-tolerant hitstop with me? I have some ideas for it but they all have major pros/cons. i'm hoping we can all learn something from the discussion

my defininition of hitstop is just setting montage play rate to X for Y seconds

triggering it would be server-authoritative, but i want all clients (including autonomous proxy) to keep in sync with the server as much as possible

[limber fox]

i need help understanding how to use gamemode and gamestate

do you put the variables in gamemode or gamestate
it seems like everywhere i look has a different answer

[jade patrol]

gamemode is server only and gamestate is replicated and all clients has it

[limber fox]

i know that much
but should the gamemode have the variables and the gamestate takes from that or the other way around

[fathom aspen]

Game mode holds rules, game state holds state. To get a better idea always open them and see what properties and functions they already entail, then u know more or less where yours should be placed

[cobalt pollen]

Oof. Making a game with basic floating movement but I want the player to be able to attach pieces onto their character (spaceship). Looks like networked character movement only uses the capsule, going to just resize the capsule to contain anything as I attached pieces I guess >_>

[dark edge]

is it floating pawn movement or character movement component?

What is actually doing the moving?

If it's a spaceship I'd probably use physics myself but that's up to you

[cobalt pollen]

I tried both

I might try physics but then prediction is up to me right

[dark edge]

Why do you need prediction for a spaceship? There's nothing more smoothly accelerating and slower responding than a spaceship

[cobalt pollen]

For physics collisions was my impression

But yes you'd think it's simple

As far as movement goes at least

[dark edge]

It is that simple, just play with the physics replication settings

If I were doing a spaceship game that's exactly how I'd do it, but it depends on how physics driven you want it to be

[cobalt pollen]

I'll try it out thanks

[gloomy tiger]

Created a blank project -> added some spawns -> packaged -> clients connected to me have ~60 ping with only cmc replicating

ideas?

[fossil spoke]

Where are the Clients located?

[cobalt pollen]

That seems like a normal ping (if it's not a LAN 😅)

[fossil spoke]

Only the Server can replicate changes of variables.

The Server will always be Authority over all Actors

Therefore an Autonomous Proxy cannot change a variable on its own and have that affect other Clients value of that variable.

Thats not how it works.

The architecture of how the networking layer is setup REQUIRES it to be Server Authoritative

There is just no way around it

Unless you want to do massive changes to the engine

Stop trying to take shortcuts

Work how Unreal wants you to work.

Its like that for a reason

[hollow eagle]

the value is set but the server never receives it

clients cannot tell the server to set any variables except through an RPC

there is no Client -> Server replication, period

clients can only set variables for themselves

[fossil spoke]

The only mechanism for Clients to affect change on the Server or other Clients is by routing it through an RPC

[fossil spoke]

There is no difference, other than Autonomous means it is locally controlled by a Player.

[gloomy tiger]

Pretty much across the street? No hyperbole, exaggeration or joke.

And it's a listen server; am hosting here, at home.

[slow wing]

What happens if I create an actor component during runtime only on the server, and set it to replicate, is the construction of that component replicated?
If not, then if the client also locally creates the component at runtime (say via a replicated event), are those 2 components then kept in sync via replication? how does unreal maintain the association between the server and client copy of the runtime spawned actor component?

[forest reef]

My clients seem to get the wrong location of their gun component. This location is used to spawn in the gun's projectile. Using the actor's location everything works correctly. Using standalone or listening the locations are set correctly. The picture shows one debug sphere going to 2 locations. I'm really not sure why this is. Any ideas?

[gloomy tiger]

• I create a session (listen server; Steam; UE 5.3.0; windows 11 etc)
• Friend who literally lives across the street connects to my session
• Each one of us are possessing our own Pawns, who have no components but a SkeletalMesh; NetUpdateFrequency of 25 and no variables replicating whatsoever but the actor itself
• Map we are connected to has nothing but some static meshes to be the ground
  - 60 ping
  I wondered, why?

Then we tried a few things:

1. I asked him to host a session so I could join, same ~60 ping,
2. I asked another friend to join my session, same ~60 ping,
3. Disabling Steam Sockets, same ~60 ping,
4. Tried a different NetDriver (SteamCorePro), same ~60 ping,
5. Tweaked each and every TickRate config on DefaultEngine.ini related to NetDriver (and IpNetDriver), same ~60 ping,
6. Build, re-build, clean build, relaunched Steam, relaunched Editor, and all the standard procedures one might blindly try, same ~60 ping,
7. We launched another co-op, listen server, Steam game we released back in 2020 (UE 4.26) and there we got around 12-17ms regardless of who hosted it
8. Launched another listen server co-op Steam game, same thing; 12-17ms regardless of the host

All the above said as we are running out of ideas... does anybody have any idea of what we could be missing?

(Below I leave a stat net picture of the client; not sure how much it may tell you but perhaps it could lead to something?)

[sharp vigil]

LogNet: Warning: UNetDriver::ProcessRemoteFunction: No owning connection for actor BP_GS_WeatherReport_C_0. Function UpdateTeamResources will not be processed.

I'm getting this when I call an RPC to to update values on my gamestate from my character. Shouldn't I just be able to set it from my player char BP? I thought my client owns this actor?

Nvm figured it out. Gamestate is owned by the server so if I call an RPC on it it wont work.

[finite goblet]

is OnRep Called in case of FFastArraySerializer ?

[fossil spoke]

Generally speaking you wouldnt use an OnRep with a FastArray. That almost defeats most of the point of using one.

As a FastArray exposes functions that express when elements have changed via replication.

    /**
     * Called before removing elements and after the elements themselves are notified.  The indices are valid for this function call only!
     *
     * NOTE: intentionally not virtual; invoked via templated code, @see FExampleItemEntry
     */
    FORCEINLINE void PreReplicatedRemove(const TArrayView<int32>& RemovedIndices, int32 FinalSize) { }

    /**
     * Called after adding all new elements and after the elements themselves are notified.  The indices are valid for this function call only!
     *
     * NOTE: intentionally not virtual; invoked via templated code, @see FExampleItemEntry
     */
    FORCEINLINE void PostReplicatedAdd(const TArrayView<int32>& AddedIndices, int32 FinalSize) { }

    /**
     * Called after updating all existing elements with new data and after the elements themselves are notified. The indices are valid for this function call only!
     *
     * NOTE: intentionally not virtual; invoked via templated code, @see FExampleItemEntry
     */
    FORCEINLINE void PostReplicatedChange(const TArrayView<int32>& ChangedIndices, int32 FinalSize) { }

[chrome bay]

It is, but you don't get a 'previous value' pass in. That's not supported

[sweet sage]

I have this AIs running on my dedicated server. What is the best way to disable the AI for a optimized server when no player can see it?

Think tarisland, where i can have more than 5000 mobs over the open world map. Running all them when players can`t see more than 100 is not worth it

I`m using void AMmorpgCharacter::OnSerializeNewActor(class FOutBunch& OutBunch) to awake AIs but how to detect when it is ready to sleep?

[strong junco]

I have a gameplay ability that should spawn particle effects and sound effects at a location. What would be a proper way to have them replicate to other clients?
I also need to update variables on the particle effects at certain points in the ability

[sweet sage]

Do it runs only 100? do bots count as CMC?

[thin stratus]

CMC is the CharacterMovementComponent. In theory yes

[chrome bay]

Anybody using World Partition in MP currently?

Seeing an issue where the persistent level is being GC'd and the engine is trying to stream it out, curious to know if anybody else has run into this.

[strong junco]

I don't want to replicate the particle system directly because apparently that will be too network intensive, and I don't want to use RPCs
My current idea is to use UAbilityTask_SpawnActor, or maybe even create my own UAbilityTask_SpawnParticleSystem
Then have the ability update those as it goes. But I'm still unsure how to let the owning client do it's own thing based on the locally predicted ability, and have other clients respond to the actual ability run on the server

[thin stratus]

I'm wondering. In a competitive game, where there are teams (let's say 2), if a character could turn invisible to those not in the same area (e.g. a high grass field or brush), what's the sanest way of handling that?

Simple state replication and handling the visuals on each client allows for cheating.
IsNetRelevantFor would be better, but I read that the delay on this actually taking effect is pretty high.

Let alone the fact that I don't know if the project I might use it on is properly perpared and doesn't break on itself if NetRelevancy stops replicating the whole character -.-

[thin stratus]

I did something like this for a "drawing" ability on a MOBA. At least I think it sounds somewhat similar.
I basically spawned the Actor twice, once replicated and once locally.
And made sure the additional actor that would come in from replication is hidden.
One can also probably fiddle around with NetRelevancy for that.
The Ability would modify the individual instance, with the Server one being used to replicate the changes to the SimProxies.

[sweet sage]

Is dormancy bad?

You can hide client side and stop sending updates

But don`t destroy

It will use the last known position, not that bad

[chrome bay]

Dormancy doesn't kill the actor, but also resends everything when the channel reopens so isn't ideal here I don't think

[thin stratus]

Also Dormancy is not per player or?

[chrome bay]

Dormancy itself like relevancy takes a while to kick in too, to avoid channel spamming

Ah yeah that too dormancy is global, not sure they ever did get per-connection dormancy working

[thin stratus]

So it would also break it for teammates and the local player

[strong junco]

How did the server replicate the changes? Using replicated variables or?

[thin stratus]

This is more meant to hide from the other team unless they are in the same area

[chrome bay]

I suppose you could do a mix of both, send properties and use relevancy, so you get the 'immediatte' effect from properties until relevancy actually kills it off

[thin stratus]

So the NetRelevancy condition is something like if (IsOnSameTeam() || IsInSameArea()) return true;

[chrome bay]

The only issue would be if relevancy stops the properties being sent, so you might actually have a case for a reliable netmulticast 😄

[thin stratus]

Right, but I'm more worried about the other way round

If an enemy walks into the area, they need to see the previously not-relevant Character again

Preferably as quick as possible

And NetRelevancy has this strange delay

[sweet sage]

What is the problem with NetRelevancy? popping?

[chrome bay]

yeah, well I guess it has to reopen the channel and that could take a while to spawn the actor etc.

[thin stratus]

Given a freshly spawned actor spawns quicker

I don't think that's all

I feel like it's more a "Let's ensure the Actor is not relevant for at least x seconds before we really kill it off"

[chrome bay]

Oh yeah that's definitely a thing

I think it's like 2-5 seconds

[thin stratus]

Yeah and that's the thing I need to have instant

I wonder if that's a cvar

Well "instant" you know

[chrome bay]

It might be yeah. IIRC it's to avoid spamming close/open channels when you're sort of hovering on the relevancy distance

Otherwise you could get a huge spike of packets due to imprecision or micro movements etc.

[sweet sage]

Do NetUpdateFrequency help?

[chrome bay]

Nah this is a lower-level thing

[burnt coral]

Isn't there something like "Net Cull Distance" or "Network culling" ?? And you can set it per object bases.. Not 100% how to code it or the 100% fundamentals of it.. But, I think it doesn't replicate or run on server unless you're within that region or distance

[sweet sage]

Net culling already works, I`m using replication graph but i want to reduce CPU usage and stop behaviour trees

[chrome bay]

@thin stratus

RelevantTimeout=5.0```

[thin stratus]

Laughable that this exists

Somewhat happy though if that solves stuff

But worried there isa good reason not to put that to 0.0 or close to it

[chrome bay]

Yeah there is, it's to stop spam when hovering on the cull distance

[thin stratus]

We have no cull distance in this game

[chrome bay]

Ah well, you're fine then 😄

[thin stratus]

It's a MOBA with a somewhat small map

The idea is to hide peeps that walk into the brushes

Typical MOBA stuff

[chrome bay]

yeah

wonder how paragon did it

[thin stratus]

But I'm not so insane to just OnRep that and wait for cheaters xD

[chrome bay]

...did they do it?

[thin stratus]

You wouldn't know. You aren't a dirty cheater.

You are the one that rages at why that <insert champ name I forgot> knew you were trying to gank the lane while sitting in that brush for 2 minutes.

[sweet sage]

https://technology.riotgames.com/news/demolishing-wallhacks-valorants-fog-war

[thin stratus]

I know that, but that's sadly not applying here

Valorant is FirstPerson, and the problems they faced are entirely different ones

Still a good read

[chrome bay]

It's a good solution but also one that only works when you can dedicate a very knowledgeable person to one very specific task, and have a highly controlled game environment

Gotta love the comments on that article though "lel this is old tech what"

Idiots everywhere

[latent heart]

Game sense!

[sweet sage]

Do the invisibility has a timer?

Or is it like lol bush

[sweet sage]

    /** Gives the actor a chance to pause replication to a player represented by the passed in actor - only called on server */
    UE_DEPRECATED(5.3, "Replication pausing is deprecated.")
    ENGINE_API virtual bool IsReplicationPausedForConnection(const FNetViewer& ConnectionOwnerNetViewer);

I have found that but is deprecated

[thin stratus]

LoL brush

[sweet sage]

https://www.reddit.com/r/unrealengine/comments/9umjqr/help_how_can_i_hide_everything_that_is_not_in/

Have u seen that?

bool AShooterCharacter::IsReplicationPausedForConnection(const FNetViewer& ConnectionOwnerNetViewer)
{

[sweet sage]

https://github.com/Noesis/UE4-ShooterGame/blob/master/Source/ShooterGame/Private/Player/ShooterCharacter.cpp line 1170

[thin stratus]

Don't think the project is on 5.3 yet, but using something deprecated isn't gonna be it

[sweet sage]

It is here

I`m using 5.3.2

I`m not sure why it is deprecated. Looks useful

[sweet sage]

void UVisibilityBasedReplicationNode::GatherActorListsForConnection(const FConnectionGatherActorListParameters& Params)
{
    Super::GatherActorListsForConnection(Params);

    // Get the current connection
    UNetConnection* Connection = GetConnectionManager().GetActiveConnection();

    // Iterate through actors in the PotentialActors list
    for (AActor* Actor : PotentialActors)
    {
        ACharacter* Character = Cast<ACharacter>(Actor);
        if (Character && !Character->IsVisible())
        {
            // Exclude invisible characters from replication
            ExcludedActors.Add(Actor);
        }
        else
        {
            // Include visible characters for replication
            ReplicationActorLists[Connection].Add(Actor);
        }
    }
}

If you use replication graph you can create a custom replication graph node and override GatherActorListsForConnection.
But you need to trigger it on visibility change

[thin stratus]

I will certainly not use replication graph haha

[chrome bay]

tbh there's little point now anyway, iris is gonna replace it

[hollow swallow]

In an RTS game, where should i be spawning stuff server side, like where to put the events

[sweet sage]

Why is iris experimental if fortnite is using it?

Is fortnite not production?

[chrome bay]

Fortnite is the test bed

Once Epic is happy with how it works in Fortnite it'll be moved out of experimental, of that I have no doubt

[sweet sage]

I see

I will replace now replication graph with iris then

Lost time with replication graph

[chrome bay]

Iris isn't really 'ready' in 5.3 tbh, still some issues

But the filters stuff is basically rep graph IIRC. Doing a deep dive on it soon

[hollow swallow]

Am i doing something wrong here? Client spawns a "building" client side so they can see placement, then when they click it calls place building, then im trying to make it spawn server side and destroy the client side visual one

[thin stratus]

You can't run ServerRPCs in non-Client owned Actors

[hollow swallow]

The client spawns the actor originally though, does that not count as client owned?

[thin stratus]

Your RPC would need to be in something the Client owns and is replicated

No

[hollow swallow]

or should i get the building actor to call to the player controller

rogey

[thin stratus]

Ownership is a network thing

The Actor isn't even replicated

tbh, the Building shouldn't really do anything unless for whatever reason that's how it works for you

You should ahve some Building Manager that does all of that

[hollow swallow]

Yeah it wont really do anything

[rocky kestrel]

How much in meters is NCD?

[solar stirrup]

square root it, divide by 100

[rocky kestrel]

(sqr(10000000000.0NCD)/100) = 1000 meters so if I want one kilometer distance to my open world game I should set NCD to 10000000000.0

Ty!

[fathom aspen]

Wait... so reliable multicasts don't care for relevancy?

[chrome bay]

They do but I'm pretty sure any pending reliables have to be acked before the channel is closed

[fathom aspen]

Ah, so in a situation where it was relevant and becomes unrelevant before it had a chance to repliacte... i see 😄

So that doesn't apply to replicated properties you say... mhm

[chrome bay]

yeah, properties are unreliable so probably no garauntee you get them before channel closes

That's what I'd expect anyway

[hollow swallow]

can server edit a blackboard value?

i have a few npcs that i can select and move, theres 1 thats in my level and i can move that one fine. But when i get the server to spawn in a new unit and i select it, i cant move it for some reason

"accessed none trying to read property CallFunc_GetBlackboard_ReturnValue_1"

[cobalt pollen]

Playerstate updates less frequently, I've never used wait for attribute change before so can't help much there, but maybe use repnotify attributes and respond to that instead of working the other direction?

[final holly]

guyz how can i send RPC with widget

i know widget's are not replicated

but how can i solve this problem

what is the best approach

[cobalt pollen]

Send it with the playercontroller? 🙂

[final holly]

thanks for reply bro

yea i am able to send with player controller

but problem is

i have to write all neccesary functions in player controller

SOLID principles are dead in multiplayer ?

i wan to know this

So i mean for exaple there is door and door have widget

i wan to call open door function

do i have write opendoor rpc in character

and trigger with the widget

i can able to with Interact interface

this works and flex

but interact interface only one have code block i cant every control with the interface funciton

[cobalt pollen]

Logically is the door asking to open itself?

[final holly]

nope

a button on the widget

the button trigger in the opendoort function

[cobalt pollen]

The player is using the button though so I don't think it's unreasonable to involve the PC in the logic/interface

But ultimately it's the way the engine is written and it's easiest to work the way it's intended

[final holly]

So, is it possible if I send an rpc via Pawn and the player obtains this pawn control?

thank for your effort Kelso you are good man

[cobalt pollen]

The actor needs to be owned by the client. I believe possessing a pawn does make you the owner but 🤷‍♂️ https://cedric-neukirchen.net/docs/multiplayer-compendium/remote-procedure-calls

[gloomy tiger]

So, we are continuing our quest from yesterday, but today with a new approach:

1. Created two blank projects in both UE 5.3.0 and 5.3.2
2. The two with same code, pawn and a mesh and nothing else
3. We two join each other and still get ~60 ping (the top-left big white text is the result of GetPingInMilliseconds)
4. Both with 200+ FPS

Even more clueless now. Ideas on what we could be debugging on?

[unkempt tiger]

I know this may not be of help at all but since youre stuck I might as well, these are my in my DefaultEngine.ini and I've never had this ping issue

[/Script/OnlineSubsystemUtils.IpNetDriver]
MaxNetTickRate=60
NetServerMaxTickRate=60
LanServerMaxTickRate=60
NetClientTicksPerSecond=60
MaxClientRate=120000
MaxInternetClientRate=120000```
sorry for the borderline pseudohelp, I don't have any other leads other than vague engine config settings

[lucid badger]

I'm trying to do "As Client" (i.e. 1 player on a dedicated server) and getting a crash that leads to this:

OnViewportResized(GEngine->GameViewport->Viewport, 0);

I'm guessing tha'ts because there's no viewport on the dedicated. Duh. So the correct function to wrap this in is

IsRunningDedicatedServer()

Correct?

Well that worked anyways

[dark edge]

You sure GetPingInMilliseconds is returning good data?

Test the round trip time with rpcs

[lucid badger]

So PIE with listen server + 1 client (separate instance) is very laggy, even though CPU is not going above 35% and GPU 40% and it's literally same computer so why is there so much lag?

This is a barebones project with absolutely nothing going on yet

But like just a sphere with replicates movement is jittery as hell

I think it's throttling the other when either is in focus

This is off

But FPS still goes way down as soon as window loses focus

And client lags when server is out of focus

https://forums.unrealengine.com/t/degraded-standalone-performance-when-testing-a-listen-server-a-client-on-the-same-machine-background-foreground-changes-performance/564876/3 found this but no replies

Engine is optimizing for in/out of focus I think. I bet there's a console command or something...

Okay, yeah, confirmed.

When I put both in standalone it's much more obvious

Focus-based throttling is my number one most hated thing in computers man

I hate when software tries to be "smart" in a way I didn't ask for

Why don't you let me worry about what is in focus

[dire cradle]

Might be Windows changing its priority

[lucid badger]

Windows?

I've never had windows throttle any other software based on focus

[dire cradle]

Since this is off, if it's really doing what it says then what else there is

Or the engine is lying in some way lol

[lucid badger]

Well

This is standalone now

Editor prefs aren't relevant, right?

There must be a console command or some ini setting

[dire cradle]

Oh that's not in the project settings, right

[lucid badger]

For the engine itself ?

Also

When one is on focus

CPU is only 60% and GPU is 10% (tiny windows)

So it's not like we're pushing resources

It's just throttling itself when out of focus

I don't see how windows oculd be responsible for that

I guess this isn't really about multiplayer anymore though so I'll look for a more appropriate channel

[torpid whale]

Hello

My character is a mesh that only the player sees and has another mesh that only the rest of the players can see (the typical Owner not see), I would like that when an item attached to the character spawns, the rest of the characters only see the item that is attached to the mesh they see, and not the item that is attached to the mesh the player sees

It's quite difficult to explain hahaha

[lucid badger]

Reading this:

Client-side prediction with server authority is considered the gold standard, however it comes with downsides; it is vastly more complex to develop, takes considerably more time to develop, and has high processing costs so for larger games such as battle royales or high player-count shooters it can become incredibly prohibitive for a server to process the prediction of so many players.

My game is coop only, so there is no point in any attempts to mitigate cheating. Is it possible to just... not use server authority for movement? Since there would be no benefit for me

[fossil spoke]

The CMC has a setting that allows you to disable authoritative updates, disable it and see how you go.

Though, if your game has low player count (which most Coops do) you probably wont benefit as much from the decrease in overhead as other types of games might

[lucid badger]

I'm not concerned with the overhead as much as the extra dev time

[fossil spoke]

If you are using the CMC, then it costs you nothing in dev time, as its already supported.

By default.

"Prediction" isnt a singular system you just enable or disable for your game.

[lucid badger]

Hmm yeah now that I think about it the stuff I would need to not be server-auth is the stuff GAS is doing

[fossil spoke]

It is a concious choice by a programmer to introduce to a particular feature.

[lucid badger]

GAS is what's setting the movement speed conditionally

[fossil spoke]

Some features, like the CMC, already come with it developed.

[dark edge]

There still would be a benefit, what happens when 2 clients say they're in the same place?

They're both authoritative, they're both right, so who's actually standing in the spot?

[lucid badger]

Why would two people being in the same spot be a problem?

[dark edge]

I mean maybe it is, maybe it's not, IDK if you have collision between players. But there's all sorts of problems you can encounter similar to that. 2 people having different ideas on the game state.

[lucid badger]

Sure. In my game there's collision between players but they nudge each other, so they'd just shove each other mutually until colliders depenetrated

I get what you mean though

THe thing I'm having trouble understanding is how I execute a prediction how do I run code on the client that it normally isn't allowed to run because lack of authority

I'm reading a lot of stuff and just seeing people talk about performing predictions but not how

[dark edge]

The CMC handles a lot of that for you, do you have any weird movement modes or just the basic walkin and jumpin?

[lucid badger]

I have sprinting implemented via GAS movespeed attribute and an ability that applies a modifier to increase it. Also stamina consumption and so on

So prediction needed around when stamina depletes and so on

But I'm stuck on Square 1 because I can't even figure out how to "edit the client-side stamina value"

I just keep reading more and more posts and guides and not a single one has illustrated what it actually looks like to predict something

They just say when/why you want to do it

I'm like a PHD on the theory at this point

[fossil spoke]

A prediction is simply executing an action immediately that you are assuming is going to be accepted by the Server as correct. The Server will execute the same action and send down a result, if the result differed the Client will correct itself to what the Server decided was correct (thus meaning the prediction failed).

If there was no difference then the Client carries on and does no corrective action.

[lucid badger]

Yes that's the part I fully grasp

100% understood

[dark edge]

If done correctly you should just be able to read the stamina and call it a day

that's what GAS gives you

[lucid badger]

So how do I execute an action immediately that I assume will be accepted by the server

[fossil spoke]

Run it on the Client

[dark edge]

execute ability?

[fossil spoke]

Depends on what it is

[lucid badger]

So for example Stamina drain or recharge

GAS only replicates the final value of stamina when it replicates

So it goes up jittery/unsmooth

[dark edge]

That doesn't sound right

[lucid badger]

It is. It doesn't replicate periodic effects, just the outcomes (via replicating the actual attribute)

So when the attribute is updating say 10 times per second on the server

It's not gonna replicate 10 times per second on the client

So it's unsmooth

So I'd like to "simulate" it on the client

Predict it

But I cannot seem to find any way to modify the client's perceived value while waiting for the next replication

[dark edge]

just interpolate in the widget or wherever

itnerpolate / extrapolate

[lucid badger]

Oh the widget could lie... and OnRep_Stamina can just force the widget to the correct position every time Server updates Stamina...

Wait but

Then widget shows 50 stamina, but you cannot use 50-stamina-cost-ability

Surely there is some way to force the client's stamina value to what I predict

Then client predicts it has 50 stamina, allows activation of ability, by time ability activation reaches server client does have 50 stamina so it works

If the widget is faking that won't work

[dark edge]

prediction is hard as fuck

I'd just interpolate towards realvalue at somespeed

it's conservative, it'll never lie to you really

[hasty yoke]

yo i need to connect to this game with a friend and i'm not sure what im supposed to fill in as a host/join because I have weak understanding of ip and ports can someone help me

does anyone have any idea

if i need to write in my public or private ip address, and how i setup my port forwarding rules? i opened a port but im not sure if i got the info right

[lucid badger]

The issue is not what to set the value to! It's HOW to set the value at all!

Changing the widget doesn't allow me to fire an ability with gas that requires the correct amount of mana or stamina

[fossil spoke]

@hasty yoke Are you using Sessions? You should probably do some research on how connecting to other matches is usually managed in Unreal.

[lucid badger]

The stamina regen is per second, so knowing what to set it to is trivial, it's just math. The question is How to actually set it via the client's prediction logic

It predicts a value that the server is probably at--good! Now how do I set that value

[hasty yoke]

no im not 😦 its ggpo but i cant seem to find a channel about general networking questions

[fossil spoke]

@lucid badger Clients can still set a local value of a replicated variable.

When the Server sends a new value down, it will override the Clients

[lucid badger]

I can't directly set the value via GAS, you ahve to use instant effects but those seem to be server-authoritative

[fossil spoke]

This isnt a general networking quesiton, it is highly dependant on how you are deciding to architect your game.

[lucid badger]

I don't seem to have "client side prediction-only effects"

[fossil spoke]

https://github.com/tranek/GASDocumentation?tab=readme-ov-file#concepts-p

Read through this if you are using GAS

[lucid badger]

Yep I'm all over that

It's guilty of the same thing with regards to Prediction. All when/why but zero "how"

[hollow swallow]

Is that the correct way to spawn an actor? This is inside my building component on the player controller

[lucid badger]

kaos is helping me in the #gas channel now, apparently you have to use Wait Net Sync but I don't yet grasp why it worked

[hollow swallow]

It works fine in stand alone, but not in client. Do i need to replicate the "Building To Place" variable?

pretty much at the moment, the client spawns a building locally just to see it and position, then when they place im calling those server functions to spawn the building server side and destroy the local actor

[fossil spoke]

That wont work.

You are passing through an Object (The locally spawned building) to the Server.

You admitted its local only.,

So how would the Server know what that object is

In order to use it to get the class to spawn etc

You would need to pass through the static information you need to the Server instead.

[hollow swallow]

ah right, so would i have to tell the server what the object is the same time i spawn it locally, in a replicated variable, then use that to spawn on server side?

[fossil spoke]

Pass through the Class and the Transform

Instead of the building object itself

[hollow swallow]

rogey got ya

i think... ill find out soon xD

[fossil spoke]

There is no need for a replicated variable

You just need to change the Params on your RPCs

[hollow swallow]

so just pass the class instead of the object

[fossil spoke]

And the Transform

[hollow swallow]

yep

[fossil spoke]

Since the class is an abstract, it has no idea what a Transform is

So you need to pass the Transform as well to be able to place it correctly on the Server

[hollow swallow]

also one other thing, i have a springarm for a topdown camera on my players that they can adjust the length of with scrolling to zoom in and out, yet if i got client i get this error

"Blueprint Runtime Error: "Accessed None". Node: Set TargetArmLength Graph: EventGraph Function: Execute Ubergraph RTS Controller Blueprint: RTS_Controller"

Do i really need that to be replicated to work if its only ment to affect the local client?

[fossil spoke]

Unless you have Server code that relies on the length of the SpringArm (which is doubtful) then no, you dont need the Server to know about it.

[hollow swallow]

Thats all i have and it is only for the client so not sure why i get the error and springarm doesnt work at all

nothing else references to the springarm

[hollow swallow]

Got the building spawning properly now though, thanks for that

[cobalt pollen]

Well is your BP player property set at this stage? Probably not hence the error

[hollow swallow]

Probably not, i thought being client side it should be fine

[cobalt pollen]

You can always just get controlled pawn

[hollow swallow]

Yep that worked, thankyou

Thatll help me fix a heap of other widget visibility stuff too i imagine xD

[cobalt pollen]

If you ask your game to read a property you should think about how that property gets set

[hollow swallow]

ahhh just that one thing fixed soooo much stuff xD

Thanks for the help guys

down to 0 errors now. Time to make some more spaghet to get them numbers back up 😅

[hollow eagle]

launch from the debugger in the first place

[opaque dagger]

-WaitForAttach on the command line

[hollow eagle]

-server YourMap

[opaque dagger]

-WaitForDebugger does the same, if it's easier to remember

[hollow eagle]

it doesn't do the same

oh, as waitforattach

you'd need both

IDE or with -WaitForAttach from the command line. Or neither if you're running single-process PIE

if you're not running a separate process for the server it's entirely unnecessary to do any of this

...no? it changes nothing about how you build

[sweet sage]

Is there any way to benchmark multiplayer games ? (dedicated server)

Can i start a lightweight client

[upbeat basin]

Is it impossible to send UObjects created on client side with server RPCs? I wanted to do a data payload kind of a UObject but even if I make the UObject replicated, server won't get the object that I'm sending, since it doesn't exist on server, right? Only solution comes to my mind is creating a struct and sending that. But that requires to put every parameter in that single struct and I would be happier to be able to create custom classes to separate and group related variables together and create object according to my need

[solar stirrup]

Nope

You'll want it to be a struct

However, you might want to take a look at FInstancedStruct

sounds like it might interest you

It's a wrapper for "any" USTRUCT

So you could make a struct that has your UObject class as a field and then an FInstancedStruct for "any" data that specific UObject needs

[upbeat basin]

Oh that sounds like it could be fitting to my needs. I'll check that, thanks

[torpid whale]

Is it possible to make: me (client 0) see something different from the rest of the clients?

[latent heart]

How different?

[torpid whale]

Yes, because I have a first person project, and being firstperson, the character is 2 meshes, one is the arms that the player sees and the rest is the complete mesh that the rest of the players see

But, by equipping a flashlight in both hands (the one with only the arms and the one seen by the rest of the players) I want only the correct one to be seen for each client

[nova wasp]

"only owner see" or just completely having it only exist for the local player I guess

[torpid whale]

Thanks

[thin stratus]

What ini was that in again?

DefaultEngine?

[oblique arrow]

I want to spawn damage number actor only on my client

UFUNCTION(Client, Reliable)
void SpawnDamageNumbers(float InDamage, bool IsCrit, FVector EnemyLocation);
void SpawnDamageNumbers_Implementation(float InDamage, bool IsCrit, FVector EnemyLocation);

void ASentinelCharacter::SpawnDamageNumbers_Implementation(float InDamage, bool IsCrit, FVector EnemyLocation)
{
    AFloatingDamageActor* DmgActorReference = GetWorld()->SpawnActor<AFloatingDamageActor>(FloatingDamageActorClass, EnemyLocation, FRotator(0, 0, 0));
    DmgActorReference->InitializeTimeline();
    DmgActorReference->CalculateDamage(InDamage, IsCrit);
}

Where im calling this is in GameplayEffectCalculation

void UDamageGameplayEffectCalc::Execute_Implementation(const FGameplayEffectCustomExecutionParameters& ExecutionParams, FGameplayEffectCustomExecutionOutput& OutExecutionOutput) const
{
...
    ASentinelCharacter* Sentinel = Cast<ASentinelCharacter>(SourceASC->GetAvatarActor());

    AEnemyBaseClass* TargetEnemy = Cast<AEnemyBaseClass>(TargetASC->GetAvatarActor());

    if (DamageMulti > 0.0f)
    {
        InDamage *= DamageMulti;
    }

    if (CritMulti > 0.0f)
    {
        UE_LOG(LogTemp, Log, TEXT("Crit Calculation"));
        UE_LOG(LogTemp, Log, TEXT("Random Range %f"), FMath::RandRange(0.01f, 1.0f));
        UE_LOG(LogTemp, Log, TEXT("CritChance Range %f"), CritChance);
        bool IsCrit = FMath::RandRange(0.01f, 1.0f) <= CritChance;
        if (IsCrit)
        {
            InDamage *= CritMulti;
            UE_LOG(LogTemp, Log, TEXT("Crit evaluated"), InDamage);
        }

        Sentinel->SpawnDamageNumbers(InDamage, true, TargetActor->GetActorLocation());
    }
    
    OutExecutionOutput.AddOutputModifier(FGameplayModifierEvaluatedData(DamageStatistics().InDamageProperty, EGameplayModOp::Additive, InDamage));
    UE_LOG(LogTemp, Log, TEXT("Damage - %f"), InDamage);
}

the problem i have is this actor still spawns on server and not on client

[thin stratus]

Is ASentinelCharacter Client Owned?

[oblique arrow]

Yes

[thin stratus]

The only reason this would happen is if it was in fact not

That's an actually possessed Character?

[oblique arrow]

Yes

I will make a screen how it looks in game

[thin stratus]

On another note, you might want to do this in your AttributeSet Post GE bla.
Sometimes Damage is still changed by the Attribute before actually applying

E.g. by a Shield

[oblique arrow]

Problem is

i can of course

but i need to make something that will tell me that is a Critical hit

[thin stratus]

Hm I think there was something you can do via Tags for that reason

Might be worth asking in #gameplay-ability-system

Kaos might have an idea

But either way, the RPC would be the same

Not entirely sure why it's spawning on the Server atm

[oblique arrow]

My theory is Execute_Implementation is server only

and that is causing this

but still

function is called on server

[thin stratus]

Well yeah that is indeed only server side

[oblique arrow]

and executed on client

[thin stratus]

But you need the Server to call the RPC anyway

[thin stratus]

Putting that to 0.0 seems to cause problems :D mäh

[torpid whale]

I can't access the only owner see from the spawn actor

[thin stratus]

Then access it after spawning?

[torpid whale]

How?

[thin stratus]

OwnerOnlySee is a Component Variable

You need to get the Component that you want to make only owner see

[torpid whale]

It is not a component, it is an actor

[thin stratus]

I know, but that boolean is not an Actor variable

It's set per SceneComponent

[torpid whale]

The idea I had was to access the spawned static mesh and mark that boolean as true, but I can't access the static mesh

[nova wasp]

Actors that are visible do so with component primitives

Or just set the value in the asset I guess

[torpid whale]

The problem is that the same flashlight that I spawn for my character, I also have to do it for the rest, I don't know if I'm explaining myself correctly

[nova wasp]

The static mesh is possible to retrieve at runtime by finding the component?

Or exposing a function that does this in the flashlight, or setting things in the flashlight based on local net role etc

Is locally controlled etc

[torpid whale]

😄

That worked, just that node I needed

thank you so much

[nova wasp]

Keep in mind that you might have to change what this means later

If people want to move the flashlight between players etc

[torpid whale]

I don't know any other way to change it, because I can't expose a variable from the actor because I'm spawning the actor through a variable of type actor class reference that I get when I pick the item

I realized that, with the character that I control, for some reason I also see the flashlight in the mesh that shouldn't be there

[nova wasp]

That mesh can be hidden for the local client

Multiplayer code is just a lot of "actually, the client does this"

Or sim proxy (other clients on a client) etc

[torpid whale]

I understand, thank you

[sharp vigil]

Any idea how to send data to a gamestate from a client?

[unkempt tiger]

through the player state

[shut wave]

Anyone Ever seen this? I'm using the EOS subsystem on UE5.0.3 and trying to get the player names. It only returns some 3 digit numbers (e.g 325 and the next player name is 326)

[thin stratus]

Sounds like the PlayerId which is a UE thing

[shut wave]

The blueprint looks like this

[thin stratus]

Replicated PlayerController array

Lovely

[shut wave]

I tried it with the straight set player array, not the replicated one

Whatever I tried it doesnt return anything else than the numbers

[thin stratus]

Yeah then the Subsystem seems to apply the name strangely

Might want to ask in #epic-online-services

[shut wave]

Have u ever seen this tho?

or any idea on how I could force to get the name? Possibly with custom c++ even?

[thin stratus]

I don't use EOS

The ID itself sounds very much like the PlayerId

That youcan get from the PlayerState

[shut wave]

yea, thanks anyways! Why not replicate the array btw?

It's for a replicated player list

[thin stratus]

Because the PlayerController doesn't exist on anyone but the local Client and the Server

A client doesn't have access to other player's playercontrollers

That's why the PlayerArray is having PlayerSTATES

[shut wave]

The script is run by the gamestate*

[thin stratus]

Which are replicated to everyone

Doesn't matter

PlayerControllers don't exist anywhere but owning Client and Server

[shut wave]

Okay interesting, appreciate it!

[sharp vigil]

Is there another way besides that?

[shut wave]

Now btw. If I wasnt using EOS, it should atleast display like "WIn..." or "Pc..." something right?

[thin stratus]

With NULL, yeah

[shut wave]

yep, so its less of an eos problem I would assume

[thin stratus]

Every Subsystem can provide a name for the PlayerName stuff

[shut wave]

yea so its more of a problem of the get player name node isnt it?

[thin stratus]

Yes and no

The name it returns is provided by the Subsystem

E.g. Steam would set it to the Steam Name

idk why you get a number for EOS

[shut wave]

Is there anywhere where I could see whats going on?

Access the get player name node somehow?

[thin stratus]

In C++ you could follow back on the name

FString APlayerState::GetPlayerName() const
{
    return bUseCustomPlayerNames ? GetPlayerNameCustom() : PlayerNamePrivate;
}

bUseCustomPlayerNames is probably false, at least I assume so

[shut wave]

alright, how would I access the C++?

On some nodes I can double click the output and it opens visual studio

Doesnt happen here

[thin stratus]

Just navigate to it via Visual Studio

PlayerState.h and search for it

[shut wave]

Opening which file would I open? 😅 Havent worked much in c++ with the engine yet sry

nvm. I found it

[thin stratus]

I got an answer for you though, at least partially

    // Init player's name
    FString InName = UGameplayStatics::ParseOption(Options, TEXT("Name")).Left(20);
    if (InName.IsEmpty())
    {
        InName = FString::Printf(TEXT("%s%i"), *DefaultPlayerName.ToString(), NewPlayerController->PlayerState->GetPlayerId());
    }

    ChangeName(NewPlayerController, InName, false);

[shut wave]

is that the fix, or what I'm lookin for?

wait lol

thats it

it has no return function in it

should I just add: {
return bUseCustomPlayerNames ? GetPlayerNameCustom() : PlayerNamePrivate;
} to the end?

[thin stratus]

no

If you have no idea what C++ does then you shouldn't touch it :D

[shut wave]

fair enough lol

[shut wave]

what was this referring to btw?

[thin stratus]

What I posted is what UE does:

FString AGameModeBase::InitNewPlayer(APlayerController* NewPlayerController, const FUniqueNetIdRepl& UniqueId, const FString& Options, const FString& Portal)
{

[shut wave]

and there's no name in there right

[thin stratus]

It seems like if no Name is passed by the connection spring

Then it will take the DefualtPlayerName of the GameMode

And add the PlayerId

The PlayerId is what I meant looks familiar to this

[shut wave]

ahhh thats why

[thin stratus]

So I assume your DefaultPlayerName is for one empty

And there is no ?Name being passedb y the connection string

Why there is none passed, that's a different story

[shut wave]

so the problem lies in the game state array of the player states?

[thin stratus]

No

The Problem is the connecting player not passing over a name I would think

When joining, a player does this:

            // Send the player nickname at login
            FString PlayerName = GetNickname();
            if (PlayerName.Len() > 0)
            {
                URL.AddOption(*FString::Printf(TEXT("Name=%s"), *PlayerName));
            }

With GetNickName being

FString ULocalPlayer::GetNickname() const
{
    UWorld* World = GetWorld();
    if (World != NULL)
    {
        // Try to get platform identity first
        FString PlatformNickname;
        if (UOnlineEngineInterface::Get()->GetPlayerPlatformNickname(World, PlatformUserId, PlatformNickname))
        {
            return PlatformNickname;
        }

        FUniqueNetIdRepl UniqueId = GetPreferredUniqueNetId();
        if (UniqueId.IsValid())
        {
            return UOnlineEngineInterface::Get()->GetPlayerNickname(World, UniqueId);
        }
    }

    return TEXT("");
}

[shut wave]

okay maybe that part of my engine is screwed

imma check

[thin stratus]

There you can see the Online stuff coming into play

[shut wave]

yep

[thin stratus]

World is probably valid

Bit strange that both functions would fail

Maybe your EOS setup isn't correct

but that would cause it to send an empty name

You can see that in the Logs too

There should be a BROWSE entry in the logs

with some ID and also the ?name stuff

[shut wave]

lemme check

[tardy fossil]

hey, so I made a custom ASpectatorPawn class and set it to my default spectator pawn, and that ASpectatorPawn class has a CameraComponent as a root component. When the servers makes a player go into spectator mode with ClientGotoState(NAME_Spectating), it doesn't seem to use the camera component.. it seems to be some generic camera.. and this ONLY happens in dedicated servers.. in a listen server it isn't an issue.. which doesn't make a whole lotta sense cause spectators are purely client side arent they?

[midnight torrent]

Hi! Can someone explain to me UObject replication logic(especially in TArray)? I read different documentation about replication, but something I didn't get. Do I need to create instances for server AND client, so they replicate with each other, or just on server only?
Because I already have replicated TArray of UObjects, but it's created in BeginPlay, so they called both on server and client, and they works perfectly. But when I try to create new object realtime on server - client OnRep get information about TArray changes, but all new elements are nullpointers

[shut wave]

There is actually no BROWSE entry in the logs

I searched everything and I can't find anything that ever calls for the players name

[thin stratus]

When joining you should have something in client and or server loh

Log

[shut wave]

yep

PIE: Server logged in

PIE: Play in editor total start time 0,168 seconds.
LogViewport: Scene viewport resized to 1550x861, mode Windowed.
LogEOSSDK: LogEOS: Updating Platform SDK Config, Time: 0.057717
LogPlayerController: Error: InputMode:UIOnly - Attempting to focus Non-Focusable widget SObjectWidget [Widget.cpp(802)]!
LogViewport: Display: Viewport MouseLockMode Changed, LockOnCapture -> DoNotLock
LogViewport: Display: Viewport MouseCaptureMode Changed, CapturePermanently_IncludingInitialMouseDown -> NoCapture
LogBlueprintUserMessages: [BP_GameState_C_0] 346
LogBlueprintUserMessages: [GM_Lobby_C_0] Player Connected

--> the last 2 lines are called by my string trying to read the players name

earlier there is this note: Start Session (User: ...)

[sharp vigil]

Does this sound dumb?
I have a game with multiple clients. 2 clients are on the same team. They have a building that npcs bring resources to which both clients share.
If client ones npc delivers to the building first then I would ignore client 2’s npc contribution? Does that seem like a reliable way to sync things across the network? Fastest client would keep everyone in sync in this case. No one is clicking these npcs. Just assign them a job and they do it

[prisma snow]

Well, the clients should't probably be the ones running that logic, you'd rather have that happen in the server and replicate the resources to the clients.

The second part of the issue is the order in which the resources are collected - I don't see many issues there - you can implement a queue so that there is some kind of order and timing on delivering the resources (for example, vespene gas mining in starcraft), or you can just let them deliver the resources instantly, there is no problem at all with that.

[sharp vigil]

i guess on that part Im confused. How would I have the delivery event be client agnostic* Right now I have my teams and their values on the gamestate (which I know is on the server and repped to clients). Ive done a bit of reading but I feel like Im missing something

[prisma snow]

Have you read the network compendium?

It's the first pinned message on this channel

[sharp vigil]

yes I use it often

[prisma snow]

Well, actors are replicated - basically the server will be running their logic by default (specially for characters etc). Your server usually is the system running the most logic and replicating values to clients, that's the default setup for Unreal (and many games/engines)

You can check for authority/net mode to conditionally execute logic

[sharp vigil]

ahhh right so I check if the npc has authority then that means its running on the server.. trigger delivery event boom

i got you. I think I was just thinking myself into a hole lol

[prisma snow]

Yes, exactly

[sharp vigil]

one server to rule them all… 😄

[quartz iris]

How would I go about making a similar system to Galactic Conquest in the original Battlefront 2?
https://www.youtube.com/watch?v=txCE7kIGQK0
Where you can select your fleet/character and move to the nearest planet

[quasi tide]

Simple idea - That is a map in of itself. Each point has a reference to the map it will go to. Then to move the ship (IE - the player), you just do something like AStar for simplicity.

[quartz iris]

How can I limit where the player will be able to go to?

[quasi tide]

Could probably even cut out the AStar part and have an even more simple approach in that things are referenced to each other and then you just do a simple move to the points

[quasi tide]

With AStar? That'd be just cutting the node out of access really.

[quartz iris]

I've not heard of AStar

[quasi tide]

I'd definitely recommend studying up on it. Pretty foundational algorithm for pathing. Even if you don't end up going with it here.

It's used quite heavily in many areas

[quartz iris]

I just need a basic system where you can only travel 1 location ahead and not just go anywhere on the map

[quasi tide]

Then do the 2nd one I mentioned. Where you hand set things up.

I gave you the simple high level ideas. Now you need to break them down and implement them the way you'd like.

[quartz iris]

I'm not sure how to make the movement system though

Like how to limit the locations you can jump to

[prisma snow]

Hi! I have a question about debugging multiplayer. There seems to be a bug in Niagara, in which running more than one game under the same process will cause some exceptions. Running server and client(s) under different processes fixes the issues. However, this also makes debugging less straightforward, since the client is launched in it's separate process, detached from IDE debugger. I assume I should be attaching the debugger manually to the client and debug in that way, right?

[cobalt pollen]

If I change bAlwaysRelevant for an actor on the server at runtime (on an actor that spawns as only relevant to owner) is that possible and/or do I need to make an additional step to replicate the actor onto the other clients? I've tested setting it on the server and the value changes but the actor doesn't show on the other client/s

I probably just need to have the client-only actors stay that way and use an RPC to spawn new relevant actors and delete the client-side actors, it's not an event that will happen frequently so not a big deal

[forest reef]

I'm trying to spawn a projectile at a components location. it works on the listening server \ client and standalone... but not when I do play as clients. I tried messing with replication and making sure the components replicate but nothing seems to change. The projectile spawns somewhere below the ground. How can I get this projectile to spawn on the component and not someplace else? Debug sphere show the component location in both the wrong spot and the correct spot.

[dire cradle]

How are you spawning the projectile?

[queen escarp]

Hey this works fine, except when i play as client then i get access none :/?

[forest reef]

@dire cradle UFUNCTION(Server, Reliable)
void HandleFire();

void ABaseCharacter::HandleFire_Implementation()
{
    if (GetCharacterMovement()->IsFalling()) return;

    FActorSpawnParameters spawnParameters;
    spawnParameters.Instigator = GetInstigator();
    spawnParameters.Owner = this;

    UObject* GunBarrelTipObject = EquippedWeapon->GetDefaultSubobjectByName(TEXT("Gun Barrel Tip"));
    USceneComponent* GunBarrelTip = Cast<USceneComponent>(GunBarrelTipObject);
    GunBarrelTip->GetComponentLocation();

    UWorld* World = GetWorld();
    if (World && ProjectileBlueprint)
    {
        World->SpawnActor<AEnergyRifleProjectile>(ProjectileBlueprint, GunBarrelTip->GetComponentLocation(), GetActorRotation(), spawnParameters);
    }
}

I have tried a lot of things but I tried this. The component replication is set manually in the blueprint.

[queen escarp]

@dire cradle hey this is related to the stuff u helped me with yesterday any ideas 🙂 ?

[dire cradle]

For multiplayer the widget needs to be created client side

[queen escarp]

oh right

[dire cradle]

It's a bit hard to explain the solution through text

[queen escarp]

hm

@dire cradle got an example or something or should i google +

[dire cradle]

I'll provide an example

[sweet sage]

Can i ClientTravel without a loading screen?

[queen escarp]

nice ty

[dire cradle]

^ Game Mode

v Player Controller

It's probably a good idea to return the controller itself in addition to the character with the delegate as well, didn't do that here

So handling multiple clients at the same time wouldn't be an issue

[sweet sage]

Do ClientTravel maintain state? how?

[queen escarp]

@dire cradle ion the player controller the last node "event dispatchers" it need logic inside it also ?

[dire cradle]

No, just the commented section

[queen escarp]

@dire cradle oh okey,
im unable to find the bind event :/

[dire cradle]

Have you created the delegate?

[dire cradle]

This

[queen escarp]

yeah in player controller

[dire cradle]

compiled?

[queen escarp]

oh wait* mybad

yeah missed that one

[sweet sage]

Guys how do i ClientTravel to another ip/port but don`t show a loading screen / use same world position?

[queen escarp]

@dire cradleok yeah that worked so it creates the widget but dosent asign the widget afterwards

hm

[dire cradle]

Assign the widget? Do you mean it doesn't add to viewport?

[queen escarp]

nah the choose widget spawns correctly for all palyers when i select unit it spawns but the "player hud ui" dont sapawn

[dire cradle]

Have you called the "Start" event you created yesterday in the character?

From the GameMode after you spawned the player

or in controller i dont remember

[queen escarp]

@dire cradlehttps://blueprintue.com/blueprint/qrk9ieni/

https://blueprintue.com/blueprint/onbjskwc/

[dire cradle]

Looks like it's fine

Do pass the controller in the onSelectedCharacter event though like I mentioned

it will be less error prone

No idea why the hud doesnt spawn, it might get fixed if you do this though ^

[queen escarp]

hm okey,

sec

where do you mean :/?

[dire cradle]

here

just add a player controller reference

and pass "self" when calling it

Then use that in the gamemode instead of pulling from the handle new player starting event

dont forget to compile

[queen escarp]

like so ?

[dire cradle]

Yes

no

add to the delegate as well

[queen escarp]

done

testing

oh the UI dident even spawn on standalone,

yeah the client gets the UI created and created the character but unable to move & UI so maybe the controller gets assigned wrong ?

@dire cradle

so if i change this to player character 0 it worked for the standalone (locally)

so the problem must lie here

[dire cradle]

dont use that index in the Get Player Controller

[queen escarp]

yeah i know, it was just test where the issue were

[neat prism]

I have an issue where my game isn't properly replicating the location of my "muzzle" on my weapon actor.

Standalone: the muzzle is properly located and its direction is properly drawn (blue sphere, purple line)

Client: the muzzle is not properly located.

This is frustrating because the muzzle is clearly properly attached to my scene root and moves/rotates with the character.. However there is a vertical offset where the muzzle is just sitting below the barrel. I'm not sure why it does this.

Beyond this issue, when I have a subsequent "look at" command exectue in the animation blueprint, the client+server visually properly update the static mesh and point the gun itself at my crosshair... but the muzzle itself and the debug drawers do not follow

[dire cradle]

does it work now? @queen escarp

[queen escarp]

the start was an "object" i tried passing the player controller so i changed to that

[dire cradle]

Revert the stuff you did in the character and make the "Start" event Run On Owning Client, reliable

@neat prism Can't have an idea without knowing how the muzzle is attached / spawned / its location drawn etc

[neat prism]

As seen here, the weapon mesh, muzzle, and debug drawings properly "Look At" the target in standalone, but when running as a client/server setup, only the mesh properly "looks at" the crosshair while the muzzle+debugs do not

[neat prism]

kk will get my stuff

[queen escarp]

wdym revert the stuff i did in the character :/?

[dire cradle]

The cast

it will always fail

You plugged a player controller reference to a character class cast

[queen escarp]

ah aye

[neat prism]

Muzzle component (USceneComponent) added manually to Gun Blueprint (which derives from C++ Actor class). I do not spawn/instantiate the muzzle component in the constructor of the C++ class. It is created in the blueprint.

Muzzle component itself derive from its own c++ class (perhaps unnecessarily?)

[queen escarp]

@dire cradle ok if iwanna make it reliabe it hjas to be run on server /owning ?

oh owning ofc

[dire cradle]

reliable basically means it wont be ignored, skipped if the server is under heavy load

[queen escarp]

yeah i know that*

ok so now it worked for listen/locall

but client still unable to cotnroll/ui

[neat prism]

Should have also said: the muzzle compnent is attached to a socket that exists on the selected skeletal mesh

[dire cradle]

can you send the gamemode and the character again?

[neat prism]

so it is strange that the static mesh visually replicates to all players and the server but the muzzle itself isn't properly following

[queen escarp]

https://blueprintue.com/blueprint/9ade465r/

charcter*/(player controller) ?

https://blueprintue.com/blueprint/wapsk2i1/

[dire cradle]

is the start event run on owning client now?

[neat prism]

Then the drawing of the muzzle location is simply in the character blueprint behind an IsServer HasAuthority check

[queen escarp]

@dire cradlehm no

[dire cradle]

do it

[queen escarp]

the start evene itself is runn on owning client

but its being called in the bind event

how do i change that on those events ?

[dire cradle]

you cant, i guess you have to do a workaround

it's ugly, but usually it solves the problem

[queen escarp]

hm

now its not possessing the unit , its spawning but not possessing

[dire cradle]

possessing has nothing to do with this change though

this comes after possession

[queen escarp]

oh it broke the link

secv

[neat prism]

Did anythinig I provided help give any ideas about what I should check to fix my issue?

[dire cradle]

Honestly I have no idea, looks like it should work

try putting a static mesh instead of the muzzle and check if it's position reads correctly

[queen escarp]

ok so now its running opn owning it spawns and possessess, but still cant move / ui

[dire cradle]

if it does, it's a problem with the muzzle component's C++ side

[queen escarp]

on client standalone works*

[dire cradle]

the hud doesnt spawn?

[queen escarp]

well i changed the "start event" to also run on owning then it spawned but still cant move

[neat prism]

I see, I'll create fresh assets and disable smoothsync to see if that fixes it

[sinful tree]

This event is in the game mode, so this wouldn't happen on the client that owns the player controller, which is where you need it to happen

[queen escarp]

@sinful tree yeah nmoticed that also

[dire cradle]

Can't move yes, but does the player hud spawn? @queen escarp

it will tell us if the start event is even running correctly

[dire cradle]

do you mean by "move / ui" just can't move? Or does the ui also doesn't spawn?

[queen escarp]

it creates the ui now

but its not hooked up

ill show u

[dire cradle]

then do what Datura said and you'll be able to move

not hooked up?

[queen escarp]

i did and the input works*

@dire cradlehttps://gyazo.com/00375de776985e6908dd09225a034aa0

this is standalone

https://gyazo.com/5dc647b46c81b1296574fea2866a919f

this is client

[dire cradle]

The errors tell you where to look at

why do you need a reference to the parent class of the character?

[queen escarp]

all 4 different player unit chooices derives from the parent class

[dire cradle]

Still doesn't require a reference?

The child classes already have access to any variable or event in the parent class

[queen escarp]

hm

https://blueprintue.com/blueprint/d5x79ai3/

well the player hud is a child of "parent widget class" wich is this one

it basicly just hold referenses

but those fail on client side

[dire cradle]

i see

[queen escarp]

since widgets are always locall not created on server using the "get player character 0" would work right ?

[dire cradle]

yeah it should

[sinful tree]

If the player doesn't have the character to begin with, then the cast would fail, which means none of the other variables would be getting set either.

[dire cradle]

the widget gets created in the character itself

after possession

wait, not necessarily

nope yeah it shouldnt be a problem

[queen escarp]

since the parent wb is created before i select characrt

maybe thats why

maybe i should create the "parent widget" after i create character

[dire cradle]

isn't it created in the "Start" event?

[queen escarp]

no the parent one is never created

so it creates when game begin

[dire cradle]

im confused

[queen escarp]

the parent wd is never created

im onyl creating the child ones

[dire cradle]

are the widgets being created before the character gets spawned and possessed?

I thought you were creating them in the start event, which is done after the possession

[queen escarp]

oh right yeah im creating the player hud widget in the start event

and when the player hud is created then the parent one is also created right ?

[dire cradle]

parent one?

Im just lost

[queen escarp]

ok so this is where im creating the "player_Hud" wb

and the player_hud widget is a child of "Parent_Wb"

[dire cradle]

this shouldn't be causing a problem

[queen escarp]

yeah right

since its creating in owning player player the owner should be fine right

[dire cradle]

yeah it's local

There must be something else in there you're referencing that's causing a problem

[queen escarp]

well in my "player_Hud"

[dire cradle]

check if the casts are failing in the widget

[queen escarp]

im referencing stuff from the "parent_Widget" inside the "player_Hud"

those are the stuff im getting errors from

https://blueprintue.com/blueprint/b0h08y7j/

this is the parent Wb

[dire cradle]

check if those casts fail

[queen escarp]

ohh you know what

https://blueprintue.com/blueprint/asytd0ev/

[dire cradle]

in the beginning of the start event, could you put a short delay like 0.2 seconds?

and see if that changes anything at all

[queen escarp]

hm yeah

then the game mode failed

but game mode cant be accessd from clients should be "authority only right ?"

[dire cradle]

game mode only exists on the server so that's normal

you cant cast to it in the client

it's a timing issue, in the widget do this, hold on

This will make sure to wait until the controller finishes possessing the character

remove the game mode cast, and it will work

[dire cradle]

yes, if you need that reference for the server do that

[queen escarp]

hm yeah so did "if server" removed the game mode fail ofc

[dire cradle]

use has authority switch

[queen escarp]

and tried tdelay on character but its still giving error

there is no node liek that in a widget right

[dire cradle]

that means you're trying to access the variable before it could be set

validate them before using them

[meager spade]

you should neve ruse Get Player Character or Get Player Controller by index in multiplayer games

[meager spade]

never use*