multiplayer

[twin juniper]

Three tasks were asked, within two weeks

Ah, the template generated that

[thin stratus]

Well

Tick runs on every player

[twin juniper]

and this is the last task

[thin stratus]

So you are executing the code above on everyone

[twin juniper]

im doomed after coding an AI

no time to solve tihs

[thin stratus]

You need to limit the Axis stuff to the LocallyControlled player.
And then use a non-reliable ServerRPC to tell the Server to move.

If you have the boolean checked for rep movement, it should happen automatically.
But that has no smoothing and no prediction. So higher pings will make this really bad

[twin juniper]

Do you mean the bReplicatedMovement? I've got a squiggle for that, so i used bStaticMeshReplicateMovement

[thin stratus]

void ASpaceMayhemPawn::Tick(float DeltaSeconds)
{
    Super::Tick(DeltaSeconds);

    if (IsLocallyControlled())
    {
        // Find movement direction
        const float ForwardValue = GetInputAxisValue(MoveForwardBinding);
        const float RightValue = GetInputAxisValue(MoveRightBinding);

        // Clamp max size so that (X=1, Y=1) doesn't cause faster movement in diagonal directions
        const FVector MoveDirection = FVector(ForwardValue, RightValue, 0.f).GetClampedToMaxSize(1.0f);

        // Calculate  movement
        const FVector Movement = MoveDirection * MoveSpeed * DeltaSeconds;
        const FRotator NewRotation = Movement.Rotation();
        if (Movement.SizeSquared() > 0.0f)
        {
            ServerMoveActor(GetActorLocation() + Movement, NewRotation);
        }
    }    
}

void ASpaceMayhemPawn::ServerMoveActor_Implementation(const FVector& Location, const FRotator& Rotation)
{
    SetActorLocation(Location);
    SetActorRotation(Rotation);
}
bool ASpaceMayhemPawn::ServerMoveActor_Validate()
{
    return true;
}

Something like that maybe

But that's mainly pseudo code of course

Or send Movement as a vector and use your root stuff

Never used that before though

[twin juniper]

Thank you very much! I will try to modify it to see what happens 🙂

[thin stratus]

The boolean is squiggled cause it's private

read the errors please...

You can use SetReplicatedMovement(true) iirc

[twin juniper]

kk thanks

🙂

[twin juniper]

@thin stratus I'm getting these errors

D:\GAME DEVELOPMENT\PROJECTS\BIG MOXI GAMES - TEST\Task 2\Source\SpaceMayhem\Source\SpaceMayhem\SpaceMayhemPawn.h(53): error C4596: 'ServerMoveActor_Implementation': illegal qualified name in member declaration
1>D:\GAME DEVELOPMENT\PROJECTS\BIG MOXI GAMES - TEST\Task 2\Source\SpaceMayhem\Source\SpaceMayhem\SpaceMayhemPawn.h(55): error C4596: 'ServerMoveActor_Validate': illegal qualified name in member declaration

I tried to remove the _implementation from the .h, but then I've got this

[thin stratus]

Show me the header part where you declare the function

[thin stratus]

You aren't declaring it as a server RPC

UFUNCTION(Server, WithValidation, Unreliable)

put that above it

(above the server function)

[twin juniper]

the ServerMoveActor_Validate must be declared too?

in the .h?

Now im getting 1>D:/GAME DEVELOPMENT/PROJECTS/BIG MOXI GAMES - TEST/Task 2/Source/SpaceMayhem/Source/SpaceMayhem/SpaceMayhemPawn.h(54): error : Bad event definition

when i use the UFUNCTION

[thin stratus]

No you only need to define the name

Without _Validate

And without _Implementation

The UFUNCTION() macro does the rest

When you call the function you use the normal name of it

When implementing it you implement only the _ versions

[twin juniper]

Thanks for your reply! I was reading https://docs.unrealengine.com/4.26/en-US/InteractiveExperiences/Networking/Actors/RPCs/ and tried to modify it

then

I put UFUNCTION(Server, WithValidation, Unreliable) void ASpaceMayhemPawn::ServerRPCMoveActor(const FVector& Location, const FRotator& Rotation); in the .h and

[thin stratus]

_Validate is probably const

And you are missing the _Implementation behind the main part of the function

And your header shouldn't have the ASpace... in front of the function name

[twin juniper]

Wtf i didnt see that

[twin juniper]

I keep getting the same BS., the bad event definition thing. It sucks, because the page tells nothing. Const or not, the result its the same =S

The error is inside the _Validate

But const or not, wtf I don't get and the page says nothing

IF I remove the Validate from the .h, the compiler tells me that the class has no member _Validate

I removed the namespace that I forgot in the validate line

[lost inlet]

what even happened here

the actual UFUNCTION definition needs a function signature that doesn't end in _Implementation, a declaration for the _Implementation function will be created if not defined

[twin juniper]

Thanks for your reply! But If I remove the _Implementation from the RPC signature, I vot this

in the cpp this

[lost inlet]

read the error

[twin juniper]

kk

I dont get it

[lost inlet]

also the tooltip placement doesn't help

well that part is clear, the screenshot I posted is what I would expect from someone who has no idea what is front of them

are you following a tutorial?

also changes not saved

also you wouldn't call Implementation directly unless you know what you're doing

[twin juniper]

I'm following the Epic page https://docs.unrealengine.com/4.26/en-US/InteractiveExperiences/Networking/Actors/RPCs/

[lost inlet]

then you didn't follow it correctly

[twin juniper]

And

[lost inlet]

void SomeRPCFunction( int32 AddHealth );```

this is what an actual RPC declaration looks like, you do not create an implementation for this function yourself

[twin juniper]

I did this

and in the cpp i wrote _Implementation in the end

[lost inlet]

this poorly formatted 5 year old blog is not something I would follow

[chrome bay]

You're calling the _Implementation part

which is wrong first of all

[twin juniper]

IF I not call, the compiler tells me that there is no

I still get an error

[lost inlet]

it doesn't help that the error is not shown in the screenshot

[twin juniper]

I will post it

[lost inlet]

also the Validate function would need the same arguments as the actual RPC

[twin juniper]

Ah, ok this must be the reason then

[thin stratus]

No

[twin juniper]

Well. it compiled, but i had to match the parameter list of the validate with the list of the implementation. the fact that it was empty was causing the error

@thin stratus @chrome bay @lost inlet Thank you very much 🙂

[thin stratus]

Right sorry, I am too used to having Resharper create me this stuff

[twin juniper]

No worries, you three helped me a lot today

thank you

🙂

And now I have a better understanding of RPC in UE4

Now let see if is going to work XD

Loading the editor here

Haha the Pawn movement apparently is sync, but when I change from one viewport/PIE window to another, the controller is not working correctly, lsomething relatd to the GetInputAxisValue i guess after moving from window to another,

[grizzled stirrup]

Almost always I use SetLifespan(2.0f) just in case. In this case it's more that the projectile explodes instantly if firing point blank into a wall, so the explode FX can in theory play before the projectile is inited on the client if bExploded reps before the init repnotify property which is a UDataAsset*. I'll try and delay about 200ms before showing FX if the init property hasn't repped yet, should do the trick. Thanks!

If it didn't explode instantly it would appear to either fly through the wall or would hang in space until the property reps

[shell moth]

Hey, I'm having this issue where client characters are falling through the level because they spawn before the client finishes streaming in the level. The dedicated server places the characters where they need to be. You can see here in one of the clients, we see the other client standing on the landscape, but the other clients show they're falling. I can push the character to send another movement replication update and the client fixes itself

Any tips on how I can force the client to finish streaming the level before enabling physcis/etc? I'm trying the Flush Level Streaming node, but I guess that's not doing the trick

I'm pretty sure this is related to World Partition not forcing the cell from loading before the player starts. I have a non-WP version of this map and it seems to work fine

Thanks!

[meager spade]

@grizzled stirrup issue is easy to kinda solve

if the OnRep is set before the projectile is replicated to client

the bool will be true on the client in BeginPlay

so just do the same path

explode it.

[grizzled stirrup]

@meager spadeDamn true that!

Another example of calling the code twice to make sure it runs

Thanks

Would be great if beginplay was guaranteed to run before OnReps do

on clients

To prevent these messy double calls

[meager spade]

OnRep should fire before begin play

if client side is different to server side

[lost dune]

I need help for an issue with multiplayer in blueprints , free or paid.

okay

i have asked the same question 2 times already

so i prefer ask for personal help

or you will strike me for spam

[short arrow]

Given the names of both GameState And PlayerState I can assume that PlayerState Is player specific and only replicates data from the owning pawn

If that's the case GameState would primarily be used to to replicate information that is non player specific but important such as things like Total Team Scores, Total Game Time, Etc?

The uses for GameState and PlayerState is a little foggy to me

[hollow eagle]

That's generally correct, except that PlayerState is owned by a controller, not a pawn.

[short arrow]

Oh I see, So then Both the server and the owning controller can make changes to it's player state?

However only the Server can Update The GameState?

[hollow eagle]

I suggest reading the network compendium: https://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf
Clients cannot replicate changes to any replicated variables (they can make a change locally, but they won't replicate it to the server). Owning PlayerState just means they can call an RPC on them.

[short arrow]

Thanks

[lost dune]

I'm looking for people who has not already tried to fix my issue:

I call the server who call a multicast using "set master pose" on clients , the operation fails

The same function set the master pose correctly in singleplayer mode.

everything but the set master pose works

These images are inside the character BP

The cast fails , the clients does not know the child actors

Why

[unkempt wing]

Is there a way to use replication conditions to replicate values to specific clients (on a team) and not replicate them elsewhere? It, in theory, could be done with an actor which lives on the server and uses client RPCs to specific clients, but that sounds hard on bandwidth.

[lost dune]

@unkempt wing

do your conditions in function of the id

[unkempt wing]

Which function/ID are you referring to?

[lost dune]

i mean you can test the player id ( is like a client id) to accept the brodcast or not

[unkempt wing]

For which broadcast? I'm not very familiar with property replication conditions.

[lost dune]

Oh you are talking about property replication sorry , ithought you were asking for event replication

[unkempt wing]

No worries! Sorry for the confusion.

[lost dune]

After google searchs , it appears that child actor components are never replicated ,so i'll not use them

[sand iris]

in a first of third person template, when I move the camera with my mouse when the game is running, is the rotation of my camera replicated from the client to the server every frame?

[hardy valve]

Dont think so and that sounds very unnecessary to replicate something only the client needs to know? 🤔

[hollow eagle]

Network data isn't sent out at the client framerate, that'd be incredibly inefficient. Data is bundled up over a short period of time and sent out all at once.
Anyway, I don't believe either of those templates replicate anything about the camera. At most they replicate the horizontal control rotation axis. iirc you need to replicate the vertical axis yourself if you care about that.

[sand iris]

I see, I was asking because in my game I have several features that require the game to know which direction my camera is facing (such as wallrunning) and so far I have been calculating such values in the client and storing them in two variables called CameraRightVector and CameraForwardVector and then calling a server RPC to set those variables on my server too from the MoveForward and MoveRight input-axes-bound functions...

But maybe there's a better way to do this?

[hardy valve]

I would have 2 boleans for "Running on wall left" and "Running on wall right" and just send when the state starts and when it ends

[sand iris]

well the way I've been getting the camera rotation is through the controller like:
const FRotator Rotation = Controller->GetControlRotation();
which is inside my My_Character::MoveForward(float AxisValue) function
so the controller rotation is replicated?

[sand iris]

it's more like I need the direction of the camera to determine which type of wallrunning the character will perform, I have 3 types of wallrunning for the left side and 3 for the right side

[hardy valve]

I would still just do 6 "states" like if the camera is in this angle then its state 3 that started and then just send when its ended or changed state

[sand iris]

I see, is determining things like which wallruning type should be performed only on the client safe? I'm not very familiar with what things are safe to let the client determine yet.

Couldn't someone use a hack to fake a collision with a wall in a client and then the client might say "hey it's time to vertically wallrun" and the server would do it even though there is no wall there?

[hardy valve]

I would run states on the animation and all fancy stuff and then the position is checked by the server,

But im not a pro at this

[sand iris]

right, do you know if collisions are server authoritative? like if the player puts a fake wall introduced by a hack on the client, will the client run through it as if it wasnt there because the server will not see it? or what happens?

[half jewel]

the client will get blocked then glitch inward

i think character movement component will stop there however

[sand iris]

i see but someone should not be able to put a wall in a client through a to wallrun upwards vertically right? the client will glitch but they wont be able to suddenly start floating in the air on the server side since the server will autocorrect teh position?

[half jewel]

try it 😅, setup an input bind that spawns a wall only on that client and have client 2 view what happens

[sand iris]

how would I spawn a cube in C++ for the client only?

[half jewel]

i would make an input bind for the pawn that would just spawn a cube when i hit V or somethinf

input in graph editor not project settings, all input is clientside only

can also make a umg widget that has buttons to spawn diff walls and stuff

[dusk tinsel]

Does anyone know how to make like an account system were you create your account, and when your in-game it shows your name you chose when you signed up, something like battle net or epic games

(Multiplayer) ^

[sand iris]

oh i see, thanks looks like from the 2nd client it my first client jsut goes through the spawned cubes as if they were not there. Is Spawn Actor from Class what you normally use to spawn something like a cube or any other actors? this is what I ended up doing

[sand iris]

I think maybe that's a question for #epic-online-services

[half jewel]

this is exactly it

[lost dune]

Is it normal when i launch the game in multiplayer , there is only 2 players and their Player ID are 478 and 479 ?

[brittle lake]

Hi guys! I have been working on a street fighter like game but even though i made a spawn and possess system in the default game mode, i still cant have my other controller to possess the second character even though my keyboard possesses the first character here is my blueprint for the multiple characters so can anyone tell me how can i fix it so that my second controller would possess the second character and make it playable?

[empty axle]

You can do things like that if you use replication graph. Then you can create team actor that would be only replicated to the team members.

[thin stratus]

Shouldn't it be enough to override IsNetRelevantFor?

ReplicationGraph sounds like overkill for this

[thin stratus]

Well if your started it with 2 players, then yes? Idk what you expected. The PlayerIds are also reassgined when players join. It's not the unique id that they would get if they use steam

[empty axle]

Yes. I also agree that ReplicationGraph might be overkill for this thing alone

[chrome bay]

Yeah unless you're dealing with high numbers of actors or connections rep graph probably is a bit much.

[woeful ferry]

Do you use child actor components?

[rocky night]

HI Guys, i have a npc that loses blood when running.. but i dont see it on clientside. so ho can i replicate this decal?

[winged badger]

replicate the state - bleeding

have clients spawn their own decals

[rocky night]

the state where i call it is flee, and it is replicated.. but just no that dang thing there:D

[winged badger]

turn on the repnotify

and spawn decals from onrep

or start/stop timer that spawns them, i assume they fade out after a bit

[rocky night]

yes i have them with a timer and fade. where can i call the repnotify? it is all called in a npc bp

[winged badger]

just swap from replicated to repnotify

and onrep funvction will appear

note: onrep will also run on server

[rocky night]

the thing is i cant set nowhere in the character bp something on details. xcept i make a custom event out of it

[twin juniper]

Guys i am having slight problem.I have two clients in my game and i also set use mouse for touch controls as true.I am having a left virtual joystick but when i drag that joystick it is controlling other client rather than my client but WASD keys are working fine for my client.Plz help me.Thank you

It is also happening for default third person character as well.Joystick is controlling other client rather than this client

[hushed breach]

anyone any experience with 'allow client side navigation' i'm using it to control 'click to move' player characters in multiplayer, anyone know if it can cause issues with cheating?

[hardy valve]

Now i got an interesting issue, When i spawn an Actor its correct for the server but for the client the spawned actors inherited components are split (like 100-200XYZ transform) from the rest? 🙈 😂

[viscid monolith]

Hi guys, im working on game, where players can switch characters. How would i make possession? I can't get it to work, because in my case only server triggers possession event, client is ignoring

Is it done through RPC? or how?

[ashen bobcat]

I have done multiplayer possession with a multicast RPC

[viscid monolith]

Logically, as i got it, i get GameState and call Server RPC function on it, that checks if everything is okay and then it gets PlayerController and calls Client RPC on it to possess

But something somewhere is not working

Like clients don't even get to Server RPC function

Even though GameState presents on all sides

If I'm right

[ashen bobcat]

Just to make sure we are on the same page:

Yeah GameState is present in all clients;
You need to make a call from Clients with a SERVER RPC;
Then the server RPC should make a call to a MULTICAST RPC;

When you call a Client RPC its supposed to be called from the Server to be executed on the client

Did I understood your implementation?

[viscid monolith]

I call Client RPC method from Server RPC method function, is that right?

I just dont get RPCs

But you got it right

I will get to my code in few minutes

[winged badger]

why in the world would you multicast a possession?

all the code that needs to run to make it happen is server side

[ashen bobcat]

have you done it?

[winged badger]

if you need to notify other clients, there is such a thing as PlayerState and OnRep_Pawn

[ashen bobcat]

in my case the clients dont change possession until they do it locally

[winged badger]

other clients don't even have an instance of the possessing controller

[viscid monolith]

Here's my implementation, i got my code

First of all, there is custom GameState class

There is 2 of them, but i will look at first one

This function is getting called from UMG

UMG gets GameState, casts it and executes this function

[winged badger]

2nd signature is wrong

[ashen bobcat]

Oh ok, two different players swap between two characters

[winged badger]

unless you have split screen

[viscid monolith]

Why is it wrong?

[winged badger]

unless you have 2 players playing on the same machine

[viscid monolith]

Server doesn't know about other player controllers?

[winged badger]

you will never have 2 different valid PlayerController references on a client

[viscid monolith]

ohhh, i got it

So if i call first function from different client, will it pass invalid controller?

[winged badger]

you only have one controller to pass

use PlayerStates

those are replicated, so all clients have them

and server can resolve their controller just by doing Cast<APlayerController>(PlayerState->GetOwner())

[viscid monolith]

It's hard to understand as i only started to work with networking...

Doesn't server replicate all APlayerControllers?

[winged badger]

no

it replicates only 1 controller to each client (their own)

but each controller has a PlayerState

and those are replicated

[viscid monolith]

So i would pass PlayerState instead of APlayerController

and use it to possess

[winged badger]

server has all PCs

so it can grab a PC from the PS reference, as PC is the PS' owner

like PCs, PlayerStates are also 1 per player, 1:1 relationship with the PC

[viscid monolith]

Okay, got it

[winged badger]

https://cedric-neukirchen.net/

some recommended reading

the compendium

[viscid monolith]

but actually, when i call GameState Server RPC method, it doesn't even get called from client

[winged badger]

you can only send server/client RPCs through actors client owns

GameState is not one of them

[viscid monolith]

oh damn! I got it

[winged badger]

PC, PS, Pawn, theiir components, anything owned by them

[viscid monolith]

it's ownership problem

Im just a bit stupid, i got it now, thanks!

[viscid monolith]

Damn, i just got wrong all the concept of RPCs...

[prisma ore]

Is this channel the proper channel for setting up steam for my game ?

[winged badger]

yes

[viscid monolith]

Can i use GameState to possess PC? Possession is not RPC method as i guess, and server knows about all PCs

sorrry for my stupidity again...

I mean i got that clients do not own GameState, so they won't be able to call RPC function to them

But can GameState make SomePlayerController->Possess(SomePawn)

in not RPC function ofc

Actually i can write down what im really planning to do

[brittle lake]

Can someone help me fix a problem with my 2nd controller system in ue4?

Ive already posted my problem here but some help would be appreciated

[viscid monolith]

Like we have 4 characters in game. And some players (1 to 4) can connect to server, so they will be able to switch through these characters, because some of them can do something better. Some characters can die and you can get more characters to your team. I need to somehow make UMG that will have buttons to switch characters, so i need player to press on character button and it's player controller will possess pawn

That's in short

[brittle lake]

.

[viscid monolith]

I just don't understand much, though i watched some YT videos and readed some guides

[brittle lake]

Its not server or internet related but my second controller is not possessing the 2nd character in my project

[twin juniper]

Would I need to port forward or something to setup a dedicated server?

[ancient badge]

Hey, i have a question related to replication.
I have a 2 functions that i use to move around my objects with my mouse.
(see blueprint below)
Do i need to set the 4 variables to "replicated" or "repnotify" so the listen Servers knows this variables?

https://blueprintue.com/blueprint/9gio-f_b/

[bronze arch]

does anyone have idea to controlling projectile in multiplayer with third person shooter?

since players camera rotation doesnt sync with server so..

[bronze arch]

basically i did this as simple but thats exploitable somehow.
guess what valo uses method to send players view angle? anyone knows?

thats so fun lol. if anyone wanna brainstorm with me about that valorant uses method to send server player view rotation(angle), mention me please. Thank you.

[lyric lagoon]

@bronze arch That looks very cool !

[bronze arch]

yeah at the experimental because its wasnt finished and unstable, need some idea for make it well

[tough gyro]

you could just replicate the rotation

[bronze arch]

but how do you think to send to server for player's rotation ? afaik replication is only work on server to all clients, not client to server.

[lyric lagoon]

@ancient badge I'm not sure what you are trying to achieve exactly, isn't setting your object as replicated shares it's location automatically?

[tough gyro]

@bronze arch check how the controller is replicating the client rotation to the server

[bronze arch]

its only replicating X and Y vector, somehow it doesnt send Z rotation

thats why i cant control it up or down

[empty axle]

IIRC Controller->GetControlRotation should work server-side

[bronze arch]

thats what im talking, it doesnt work. its only work on character mesh rotation, not the actual camera, also Z rotation wont change, so i cant go down nor up on server.
well as expected because character wont change Z rotation tho...

with quick settings (nvm the async task its just sample)

its look so different tho

guess the one way is go with rpc

[empty axle]

works great for me in my quick test

[bronze arch]

yes btw you can see the R= is Zero, thats for rotating up down

[empty axle]

it's roll

it's not for rotating up and down

[bronze arch]

[sand iris]

Is there such a thing as an RPC call limit or bandwidth limit for RPC?

I have a Server RPC function which I was calling inside a function that pretty much ran on Tick. Even when I completely comment out the contents of the server RPC function, just the act of calling it seems to create position net corrections when I run:

[sand iris]

this is just running in the editor btw

[bronze arch]

oh damnit me, you right, my rotation wasnt work because of using smoothsync, not the CMC replication

well i tried with CMC its work but im using custom movement replication to avoid high send rate and bandwidth for 10v10 players in match

[empty axle]

for 10vs10 you are most likely fine with the default CMC replication

[bronze arch]

per instance

[empty axle]

and what is that Do Async Task node btw?

[bronze arch]

its something like event tick

similar but asynced ticking for performance gain purpose

[empty axle]

if that is running on a separate thread then it is not safe to use it like that.
You shouldn't read/modify resources from another thread if they are not thread-safe

[bronze arch]

yes if i do use CMC replication it works, but not for custom movement replication

[bronze arch]

its game threaded btw, i also tried just CMC without change

[empty axle]

if those task are running on a game thread then there is no performance gain from that 🤔

[bronze arch]

well thats why its async, not too much performance gain but small.
it just ticks intermittently with the game frame instead of many ticks in one frame

[wheat magnet]

does game instance exist on client?

[bronze arch]

yes but locally.

[wheat magnet]

i mean on dedicated server

i'm running dedicated server on playfab

does game instance on that dedicated server works?

[bronze arch]

everyone has game instance on locally, you just cant RPC'ed or replication something on there

[wheat magnet]

i'm getting a variable from game instance and using inside game mode

but it's value is false

i mean the value looks like false from server

in client side the value is true

[bronze arch]

dude

thats what i mean its LOCAL not in the NETWORK

so you cant read a client variable instance from server

its special for game like

uhhh

[wheat magnet]

@bronze arch

the value is false

for dedicated server, where should i store a variable like persistent variable?

[wheat magnet]

i need a network variable

[bronze arch]

read this : https://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf

[wheat magnet]

thanks, i already have this book, will read for sure, can you please tell me a solution?

[bronze arch]

player controller or state, or pawn

[wheat magnet]

i want to get variable in game mode and store in somewhere

like what i did earlier i saved in game instance, which was incorrect

so where should i store variable?

so it works in dedicated server as well

state means player state or game state?

@bronze arch i think the best solution is to store value in state ( so game state or player state )?

[bronze arch]

Well, If you don't find out yourself, there's nothing I can do. because we don't even share the same project/mind. Also, it won't help you in the future when you alone.
That's why most of the time I research and do it myself.
just saying tips.

[bronze arch]

try player state

[wheat magnet]

does variable needs to be mark as replicated as well?

[bronze arch]

if you set it from server yes, if not you only way to send that variable via RPC to server

[wheat magnet]

i'm just setting like normal method, get player state -> cast to my player state -> set bool to false or true

does it works on dedicated server?

[bronze arch]

if you know of to get playerstate from your locally controlled character, yes. if no, google it. Also add send to server rpc event on playerstate. Hope that's enough tips for you, im gotta go

[wheat magnet]

i need to set variable inside widget

i mean i want to get player state inside widget

does it works?

well, it looks like i can't able to get player state inside widget

what is solution to this?

@bronze arch

i only see game state inside widget

does game state exist on server? so does it works?

[lapis zinc]

does unreal support ipv6? I'm trying to replication right now and its working for local games using ipv4 address, but I can connect with my friend thru ipv6. am i missing something?

[silk abyss]

I don't know for sure with ue4 supports connection using ipv6 or not, but it is needed that your host need to be able to reached via a real IP address.

Ie. when I local host a listen server, I need to setup my port forwarding first so my friend can connect with my public IP address.

So if you are doing some prototyping locally with your own computer, try to make the Nat layers as less as possible.(sometimes need to talk with your ISP)

My setup is modem→router→pc

I just talk with my ISP so the modem is in bridge mode so it doesn't operate it's own Nat layer

[lapis zinc]

so it my code working then?

also when I put in my public ipv6 address it returns me to the default map not the designated map I chose. is this normal?

I assume if there were any problems it'd be here

[languid igloo]

stock AStaticMeshActor is not network replicated right?

so I need to make an empty BP actor with a staticmeshcomponent to be able to set replication on them?

my current issue is using AStaticMeshActor the client doesn't see them, only the server instance can see them

[lapis zinc]

So apparently ipv6 and ipv4 work the same way and doesn’t matter? Hmmm

[lapis zinc]

How we that be done in blue print?

[winged badger]

@languid igloo the component will replicate with the actor, its on CDO

you can just do SetReplicates(true) at runtime

depending on what you're up to

[languid igloo]

on the stock actor? the actor that gets created when you drag a static mesh onto the editor

[winged badger]

non replicated Actors spawned on runtime won't propagate to clients, but you can turn the replication on per instance

then its part of the package

client should see them fine

[languid igloo]

where do you set replication on it?

[winged badger]

bNetLoadOnClient = true

you don't need it

unless you need it to replicate its own members/subobjects

[languid igloo]

no it's just a non movable static mesh actor

weird that it's not showing up in client

[winged badger]

if its saved with the level

[languid igloo]

it does, it's placed in the editor

[winged badger]

and has bNetLoadOnClient checked (default true)

it should not only be visible, it should also be net addressable, meaning pointer to it can be resolved over network

its no different then your floor mesh in that regard

[languid igloo]

weird,

[winged badger]

it definitely doesn't need to be replicated

[languid igloo]

I ended up just created a new actor with a static mesh component with replication checked

and they worked

[winged badger]

you really don't want to be replicating actors that don't need to be replicated

net broadcast tick time is a thing

and its not cheap

[lapis zinc]

whats the best way to do line traces for replication?

[lapis zinc]

i think i got it

[round star]

Anyone get advanced sessions to work in ue5 XD

[prisma ore]

I have not tried with UE5

[round star]

ALS seems to be working well

[distant talon]

just checking, if a server calls a c++ replicated on server event, is ue4 smart enough to bypass the replication? Are there any downsides performance wise? It's easy to do it the other way but it's much cleaner just to have one function that gets called from client or server im thinking

[silent valley]

It's just a function call, not RPC. So yeah you can call it manually without any network involvement.

[distant talon]

i dont mean if you call the _implementation, i mean if you call the base function which acts like an rpc

might be the same answer just trying to clarify

[thin stratus]

You are not replicating it AT ALL

Read the Network Compendium that is pinned to this channel.

Second pin from the top

@twin juniper

[steep terrace]

Hey, I have a problem need someone to help . How can i stop character mesh follow control rotation? It follows contol rotation when my character moving.

[chrome bay]

The mesh doesn't follow control rotation, the character capsule does

The mesh is attached to that capsule and inherits it

The character movement system moves and rotates the mesh independently for smoothing, so you should avoid moving it yourself for anims etc. Use a bone if you want to do that.

[lament sinew]

Hey,
Is steam matchmaker able to launch a dedicated server instance on demand and send ip/data to clients in the queue?

[chrome bay]

no, spooling up server instances is something you have to setup with whatever service is hosting them

Steams matchmaking is just about querying for suitable servers as a group, that's about it.

Process is described here: https://partner.steamgames.com/doc/features/multiplayer/matchmaking#2

[gentle depot]

I have an issue that I haven't figured out what could be a problem.

Basically I have a Inventory System that I create items hidden at the beginning of the game and I call the item information from spawned item (like it's image, transform, uid, variables etc.)

But the problem is, when I create items at the beginning, Server has no issue but when client spawn items, they only valid for client. I saw the spawned items on Server, I check replication status and they are fine, when I try to take items from ground by Server has no issue, but if I spawn 8 items by client sometimes 3 sometimes 4 of them return as Valid for Client. When I check isValid status of item from client-side, i have no issue and it returns true, but when I call isValid status on replicated on server event, they return invalid. (As I said, I also test replication status and has no issue)

https://blueprintue.com/blueprint/fuf5v3po/
This is where I create items (Create Item event is Replicated on Server + Reliable)

https://blueprintue.com/blueprint/984ambfk/
Here is Create Item Event (TempItem is replicated variable)

Honestly I am not looking direct solution my issue, but if you give me some idea about what could be a problem I could work on it.

Thank you! :)

[steep terrace]

The problem solved!!!! Thx so so so so much!!!! 😆 👍 👍

[kindred widget]

@gentle depotWhat exactly is that function intended to do? It's named Sort, but it's creating things?

[gentle depot]

This is just for developer mode, sort is for sorting inventory for players. It's called at construct event of widget. It spawns the items depends on the items he chose before starting game (I haven't sent that part because I only use developer part to make tests) and the sort inventory function spawn items and then sort the inventory by getting information from spawned items.

Basically;

• Player chose the items at the items widget of lobby.
• Then inventory system called at game start.
• Server and Client spawn items invisible at the place they start game.
• Inventory System get the information of items (like Image to Show inventory Block, Amount of the item, Name of the Item etc.)
• Sort the inventory depends on the choice of the Player.

And the result;

But the problem is When I click 1-2-3-4-5-6-7-8 (inventory buttons) for server he has no issue to equip. But when I try it on Client, sometimes 1st 2nd 3rd items works fine but others not, sometimes 1st 3rd 5th works fine, but others not

[kindred widget]

I don't know if this is bad wording, but it's wrong. Clients never spawn anything.
- Server and Client spawn items invisible at the place they start game.

[gentle depot]

I know, client send the item list to server to spawn

[kindred widget]

Ah, noted.

That function you posted, is it ran just on the server, or is it ran on clients too?

[chrome bay]

Problem is your inventory items will be arriving on the Client at all different times. There's no guarantee they will have all arrived when you create the widget. You should use OnRep callbacks to tell the UI to update based on the inventories current state.

[gentle depot]

Yes both run the sort inventory function at the beginning, Create Item event is replicated on server

Yes but if inventory has the issue to collect item information, it doesn't get item image too.

Because item images also variable on item.

[chrome bay]

Yeah exactly

So the UI has to respond to the inventory changing

[gentle depot]

Yes

[chrome bay]

So use OnRep callbacks, and when the inventory changes, broadcast an event that the UI has subscribed to so that it can rebuild itself

You can't ever guarantee that the UI will be created at the perfect time, networking is inherently latent and subject to race conditions.

[gentle depot]

I also check the item information in inventory system and items created and saved greatly on Client-side inventory. This is why I thought it's replication issue but replications seems fine when I test it on server-side

[chrome bay]

If you simulate that with latency, it will probably not work at all

[gentle depot]

Okay I can try replication callbacks too :) Thank you, I can inform again with latest results

[chrome bay]

- Server spawns the inventory
- Client has an 'OnRep', which pushes an event when TArray<MyInventory> changes.
- The UI panel binds to this event, then rebuilds itself based on the current state of the inventory - and also when it's first created.```

[winged badger]

or better yet, a fastarray that can broadcast just per item changes

[chrome bay]

I think this is all BP @winged badger from what I gathered

[winged badger]

slightly more complicated, but not by far

[winged badger]

assumed it was code 😦

[chrome bay]

BP = Multiplayer: hard mode

[winged badger]

its doable as long as you have <= 4 players and a small game

i think, was never actually crazy enough to try networking in BP

[lusty sky]

do you have to keep the array of items synced in order between client and server?

[kindred widget]

@lusty sky Normal Array will do that by default. At least as far as it can. Usually best not to allow clients to mess with the Array and only handle copies if you need sorting or stuff.

[gentle depot]

If you ask me, no, I only sync them when the item equipped or drop the ground, because I need to replicated dropped item to see everyone. Other than that status, they always stay still as Hidden at the place they used last.

[lament sinew]

Hmm If the player moves some items in his inventory and then sends an rpc to stack an item, it will look wierd if you received updated array if its not synced in the same order i guess

[gentle depot]

For sync I have no issue honestly, when the item returns valid, drop and equip works fine, but honestly I don't understand what the issue totally. Because theoretically everything works fine, and doesn't work same time :)) Half of the items works fine, half not. But I guess maybe spawning items quickly causes that issue, maybe I can create custom for which have a delay on every tick if this is the issue :)

[potent cradle]

Hmm, what actually happens to the player's possessed pawn when they exit the game/disconnect from the server. It seems to be removed, is that right?

[lament sinew]

i belive it gets GC'd if its not longer referenced xD

[potent cradle]

https://answers.unrealengine.com/questions/335074/how-to-read-pawn-values-while-player-disconnect.html

AHA!

[lusty sky]

LOL obviously its getting destroyed did you expect something else?

[potent cradle]

Expectations are dangerous 😉

[chrome bay]

You can change that behaviour

But yeah by default, the server kills the players' pawn when they logout

[potent cradle]

Yeah, overriding the function 😄

Curious how the event isn't in blueprint

Gotta expose it

[chrome bay]

Meh see above RE Blueprint and Multiplayer 😄

[potent cradle]

Heh, yes

The further along I get, the closer I get to understanding the whole "multiplayer needs C++ mantra"

[warped berry]

I'm making a lobby and using BeginPlay in PlayerState to notify join or leave for players, but on the host screen player name property for all clients is empty in BeginPlay but on client screen all names are there! why on host it is not ok?

client name on host screen is empty, but all names on client screen are there

[warped berry]

in BeginPlay everything should be replicated, right?

[chrome bay]

No, no garauntee of that at all

[warped berry]

is it a coincidence that it's working correctly on clients?

[short arrow]

It works with 2+ clients?

[warped berry]

yes when a third client joins, the second item gets a name but the third is empty

I guess it's a delayed replication? but why and all clients get the correct data

[chrome bay]

Begin Play is called by the GameState when that replicates, so depending on whichever order things replicate in, BeginPlay may be called at different times

[short arrow]

To see if it's delay with begin play just add like a 5 second delay timer

And then have the server run that

All clients should be loaded in by then

[chrome bay]

can't garauntee it though

and it won't work for join-in-progress

using delays to get around race conditions is a quick way to end up with a very unstable MP game

You just need to make the code more resilient to that kind of thing

[short arrow]

I meant it for test purpose, certainly not a good thing to keep

[chrome bay]

yeah for sure

[warped berry]

yea actually I'm currently trying to get rid of all timers, so I thought begin play is the way to go

[chrome bay]

The way to work around initialisation ordering issues is to use OnRep callbacks mostly

But a lot of actor properties don't have those exposed to Blueprint

In fact I don't think any of them are for base properties

[warped berry]

I'm in C++ so it's fine, but I want to make like a lobbying system so that when a player joins everyone else is notified

and in case I have many properties, I'll have to depend on OnRep for all ?

[warped berry]

this is interesting piece of info that I rely on, it doesnt matter what the order is, I just want to get player state properties in begin play

[chrome bay]

You should be able to get any of the PlayerState's own properties in it's BeginPlay without issue - but only for that actor.

What you can't do is use say, the GameState begin play, and assume that all other player states will have replicated by then.

[warped berry]

ok cool, but I'm using PlayerState's BeginPlay

[chrome bay]

But the order very much matters - because you could receive another players player state before your local UI is even available.

[warped berry]

oh okay, hmmm but my own player state will BeginPlay after my UI is available, right?

and the idea I wanted to implement is to listen to changes in PlayerArray but I cant find a way to!

since it gets filled locally

[chrome bay]

it get filled via AGameState::AddPlayerState

So you could add an event - but you will also need your UI to wait until the GameState is available too, before you can bind to it

[warped berry]

so there is no way to do it without using timer delay ?

you need to replicate it

[chrome bay]

The way I do it is have a global event that the gamestate calls when it's available. I use a subsystem for that, since I know the subsystem will always be initialised before anything else.

[warped berry]

set it to replicate and use RepNotify in BP to update UI , and it will be updated automatically on all clients

[warped berry]

you mean I can just broadcast that event from AGameState::AddPlayerState !

[warped berry]

there the name is still empty

you should change the value on server in order to replicate, you can read more about replication first

[warped berry]

to run that on server you have to make that call from an actor that's owned by the client

[warped berry]

use player controller

[kindred widget]

Character is owned by the controller that possesses it by default and should be fine to make RPCs.

[warped berry]

why is it only for that actor? ,,, because on clients they can get all names without problems!

[neat seal]

Hello everyone! I am curious to know if anyone has found a proper solution for multiplayer observer cameras after dying. (ie to spectate other players once you are dead and out of a match). I have tried several approaches but they have all suffered from jittery movement on the character being observed. So far using SetViewTargetWithBlend and providing a reference to the players private pawn as the target as opposed to the camera or controller is the only solution I've found that follows the camera's pitch as well, without additional networked data retrieval (though it does not include things such as FoV changes on the observed character when aiming and such) but it still suffers from the same jittery movement issue on the player being watched as the others.

If anyone has found a way to do a proper observer camera that views from the target players point of view (ie shows what they are seeing/ sees what they are aiming at etc, not just following their character), and does not suffer jittery movement issues, and would share the solution (I would be willing to pay for the solution too if can show it working properly in an actual networked setting similar to a real game and not just a couple pawns in an empty scene), it would be extremely appreciated! Thanks.

[winged badger]

CMC? SkeletalMesh is interpolated, Capsule is teleported

@neat seal

[neat seal]

cmc = character movement component? if youre asking what the observed characters are / how they move, they are character based actors and yes use character movement component

[meager spade]

ShooterGame/UT4 has observer setup

and that is smooth over networking

[neat seal]

ive tried various targets for the setviewtargetwith blend, ie the characters controller, the pawn etc, so far the private pawn as target gives best results as its the only target object that also lets you see the observed characters camera pitch too

ah does it @meager spade ? ok I will set a proejct up with that and take a look at what they are doing

[meager spade]

problem is the capsule is teleporting

and the camera you are observing is likely attached to the capsule

[neat seal]

ah ok thats a good point

[meager spade]

so your seeing a jump everytime the server sends new capsule location in

camera needs to be on the mesh

[neat seal]

so maybe attaching the camera to the skeletal mesh would fix that

[meager spade]

as that is what is interpolated client side

[neat seal]

ok now i see

I will try that right away

and yes now that you mention it my springarm is attached to the capsule itself, thats probably the culprit!

[meager spade]

100percent the issue

[twin juniper]

Im trying to update the weapon mesh of a component in my actor. I first line trace to find an actor and then get the data from that actor, then set that as a variable which is a struct. That variable is rep notify and in the notify event i call a function called update weapon mesh which just takes the data from earlier and sets the new mesh. However, when the client does this the server does not see the new mesh, but when the server does it the client can see the new weapon. Anyone know what Im doing wrong?

[neat seal]

awesome I will make that change and see how it goes, thanks guys 🙂

are you making sure the repnotify var is being set by a function running as server? I use similar setup for char customization mesh changes and it works well

and the repnotify ensures that even clients out of relevancy range or who join the game after the change still see it correctly

[twin juniper]

ahh no im not setting it on a server let me try that

ty it works 🙂

[neat seal]

awesome

[kindred widget]

Because you're spawning it on beginplay once for each character.

So if you have two players, you'll have four widgets total, two on each player's screen.

That is more of a complicated question than it seems. Realistically this should be called on owning client only through some virtually overridden functions in the possession line. If you're blueprint only, a simple and easy, and fairly performant hack is to just check the local controller's pawn on tick in the HUD class and call functions based on whether that changes.

[lament cloak]

Anyone know why GetNetConnection() is returning Null on the server?

I've tried grabbing one from the PlayerController, Game State, and other replicated actors. What am I missing? Everything seems to be replicating fine so I'm very confused

Testing in editor on 4.25 as a listen server

All I really need is a UPackageMap though

[severe widget]

@lament cloak probably have to interrogate ClientConnections in a different way

I don't know the other way

dig around

[foggy idol]

is there any way to calculate the delay between a client and a server

like say you have a timer

if I can calculate that delay then cant i just offset the local timer by that delay

[eternal canyon]

ping / 2

as ping is both ways

so ping / 2

is one way

[foggy idol]

actually I just solved the issue

I was dividing ping by 1000 instead of 10

so if the delay is 2

then I subtract 0.2 from the length of the timer

and end up with synced timers on the client and server

Thanks tho @eternal canyon

F

it does not work noww

[severe widget]

wait what

[foggy idol]

what is ping measured in ?

[severe widget]

ms

[foggy idol]

I wanna convert it to seconds

so then / 1000 ?

[eternal canyon]

ping is milleseconds but is represented as an Whole number when shown in UI usually

[foggy idol]

this is basically what im trying to do

the function is called On_Rep so I expect delay

[severe widget]

Well what you wanna do is replicate the servers GameTimeSeconds and figure out the delta to get a synced time that is shared.

So each world (clients, server) will have whatever (based on uptime) but they have another one that is synced.

[foggy idol]

but im stuck on trying to compensate for that delay

[severe widget]

Any business logic on clients uses ActualServerGameTimeSeconds

[foggy idol]

oh wait

I can just pass the game time as a client event

[severe widget]

OnRep of that, you need to factor in the ping/2 (at the time the server starts replicating the timestamp)

you do that once on join

then any time value the server sends should be approximately the same on clients

you can resync the time periodically

[foggy idol]

Im gonna need time to comprehend this

[severe widget]

Hrm

I see what you're doing though and that could work to have the timer be close

it's difficult to perfectly sync things

but you could also send down an event to run a function at a particular time

The standard timer stuff can't do that though

RunEventAtGameTime is nice because if a client happens to be ahead it can immediately fire (or ignore it, if too much time has elapsed)

[foggy idol]

Im sorry to ask but would it be possible for you to summarise your solution above ?

[severe widget]

tell clients what time it is for the server when they join. Store the offset or actual time

use that

Timer Manager doesn't use that and can't be made to use that easily

[hybrid zodiac]

Hi everyone, I'm using the Advanced Sessions Plugin in 4.26.2 to get dedicated and listen server functionality working. However, while I have dedicated servers working great, I'm completely stumped as to why my Steam listen servers don't show up in the Steam browser, or when using "Find Advanced Sessions". To test, I have a very simple setup. When I hit comma, it starts a session and listen server:

https://gyazo.com/a4039ba44501957b6b569ca1210810de

It appears to create the session successfully and I travel just fine, but when I then check in the Steam server browser, or run a search for advanced sessions within the game, the server doesn't show up. If I run a dedicated server it works fine and shows up. Am I missing something here? All the tutorials say the above is correct...

I am running from a source build of the engine, and I have added the global definitions to both my Target and ServerTarget build files, as well as added the necessary bits to DefaultEngine.ini. I am testing by simply launching the game from the uproject file

[stone dust]

Hello guys, I just opened a new project and made almost no changes to it, I followed a multiplayer tutorial and here are my multiplayer settings https://gyazo.com/9cd83fe8216a5004fc03f209d412b817

the problem is the movement replicates on the server side but when I move in the client side the pawn does not move in the server screen

[hybrid zodiac]

@stone dust which pawn class are you using?

[foggy idol]

thank you

[foggy idol]

I did it using the game time from game state in the end

its not perfect but stays close even at 200 ms delay

[sinful tree]

Just wanted to let you know, the actual ping is that ping value * 4, and you need to convert it out of the byte value as it can only hold up to 255.

[foggy idol]

that could have saved me a lot of mental damage

oh well

it is what it is

at least it works

[lament cloak]

What I'm trying to do is use a FNetBitWriter to send some data to all clients. But it's from a manager actor. No client actually owns that actor, so I guess that's why GetNetConnection() on it isn't working

I'm ultimately trying to do something like this, except their example works because they're doing the opposite, sending from a client to server
https://forums.unrealengine.com/t/serialize-a-uobject-so-it-can-be-sent-via-an-rpc-over-the-network/86954/9

[foggy idol]

In-Case anyone wants it this was the final solution

the pin above the subtraction is connected to the length the timer is supposed to be

[keen ivy]

so from what I understand, GameInstance is the correct class to use to persist variables across maps
however, I'm having trouble replicating variables from server to client
is it supposed to work?

I'm replicating an array of structs

[sinful tree]

You can't replicate through game instance. Each copy of the game has its own game instance which only the local copy can access.

[keen ivy]

really

so whats the proper way to carry information across maps in a multiplayer game

[sinful tree]

You can still store it in game instance, you just can't replicate from it.

[keen ivy]

for my use case im trying to store a character selection, and in the next map, spawn the actor, but i call the method from the server

which I believe is correct for spawning actors in MP

[sinful tree]

So the server should call to the appropriate player controller when something is needed. The player controller can then read its game instance, then send back the data to the server on the player controller.

[keen ivy]

interesting

the thing is, for my game, the player controller is kind of separate from the actors it controls

its a multi unit game

I was thinking of storing netId on the units

so it determines what you can select and control

so youre saying

on one map, let each player make their character selection, store it in each player's game instance, then load the next map, the server side player controller will attempt to spawn the unit based on the previous selection

so call a server only function that takes an argument for what to spawn

and call it from each client

fetching the data from the local game instance?

so its kind of like how input is handled then

ok that worked lol

[sinful tree]

The player controller should be thought of as strictly the "essence", "brain" or "mind" of the player. Even if the controller is not strictly possessing any specific unit, the "mind" still exists and can exhibit control over what you allow it to.

Ideally you wouldn't allow your player clients to store their selection as that means they can attempt to manipulate the value locally in their memory --- as an example, let's say you had a multiplayer game where each character could only be selected once under normal conditions but someone keen on cheating could manipulate the value they have stored and then allow them to spawn as something they shouldn't be allowed to spawn as since someone else already selected it.

That being said, yes, you can store the value on the game instance and then have the server request from the clients for their selection.

[keen ivy]

yeah, I get that

for my game its probably okay, considering its a co-op game

but I can see how that would be an issue in a competitive mp game

whats the right way to do it?

[sinful tree]

If you're doing a lobby-like game where players can't drop in, then I believe you can use seamless travel which can make the player controllers and player states to persist. So then you have your players connect to the server - make their character selections, then all of them move to the new map. So your server can store it on the server copies of the player states of those players.

[keen ivy]

ah

yeah I remember having some issue with seamless travel

Ill have to look into it

good to know though, thanks

which class is the appropriate class to use as a container for game wide replicated variables?

is it game mode?

not cross map, just in general

[sinful tree]

Game State would be best

[keen ivy]

ok

[sinful tree]

Game Mode is not replicated to clients.

[keen ivy]

only game state?

[sinful tree]

Well I mean... You could use an actor placed into the level and replicate from that, but Game State is already available and meant to be used as a means to replicate stuff that is common to all players.

[keen ivy]

makes sense

[sinful tree]

ie. Team* Scores

[keen ivy]

was mostly curious if that was the only one which was replicated, amongst game mode, game state, and game instance

[sinful tree]

yes out of those, only game state is something that is replicated and can be accessed by all clients.

Game Instance is like the "game" copy itself - accessible only locally, and even clients have it.
Game Mode is only available on server in multiplayer. It doesn't exist at all on clients.
Game State exists on all, and is common between all connected clients.

So anything replicated on Game State will exist on the client versions.

[keen ivy]

gotcha

thanks for the info

[keen ivy]

kind of random but have you ever had issues setting a custom game state?

I set it in my project settings and in my game mode (also a child class)

and its always returning game state base when I call get game state

is it per map or something?

[sinful tree]

If you used game mode base for your game mode, you need to use game state base.

if you used just game mode, then game state should be used as the parent class.

[keen ivy]

got it, thanks

[rocky night]

HI, how can i replicate this?

[short arrow]

Client -> Run on server -> Multicast -> Spawn Decal At Location

I believe this is known as RPC cast

[rocky night]

can i call it in th e npc bp or only in the World bp?'

[short arrow]

You can call it in the AI's blueprint if that's what you mean

That said you can skip the RPC cast and just multicast it if it's called by an AI

[rocky night]

i got what you mean, but this node dont offers to change it to multicast from itself. thats why i struggle here a bit

[lapis zinc]

alr im confused as hell, is unreal "replication" and "listen client servers" only local, like LAN over wifi? How do you make a true online game then without using steam or dedicated servers?

[short arrow]

I'm assuming you're using beginplay or event tick

In which case you'll need to create a new custom event that calls multicast, and then point to it

[short arrow]

listen servers aren't local only

[peak sentinel]

Anyone has any guide or article about how push model works

[twin juniper]

Hello everyone.I have a gun skeletal mesh actor and it is not replicated.the socket transform of that skeletal mesh is not same in both server and client.But the skeletal mesh transform and actor transform is same in both server and client.I am using that socket to attach my camera during scope action.I am problem with it.Thank you

[lapis zinc]

how do i know if they are working online or not?

i have had many successful attempts or wifi but never across multiple network connections

[twin juniper]

Hello guys.I am currently developing a game in ue4 dedicated server method.But I am having some problems with socket positions.Is there any way to visualize the server pawns like how they look and their state.Thank you.

[winged badger]

skeletons are disabled from ticking on dedi by default iirc

[bronze summit]

https://streamable.com/0n5gr2 Is this about the same? I think we have a similar issue. Somehow it only updates after recompile at runtime and after that it keeps running and updating the socket just fine

[bronze summit]

Incase you still need a possible fix like the issue I had above ^ try this under optimization in the skeletalmeshcomponent (I had issues with sockets syncing due to that)

[hybrid zodiac]

@twin juniper you need to make sure the mesh is set to "always tick pose and refresh bones" in the "optimization" section. By default meshes are set to only refresh bones when rendered ("always tick pose") but since dedicated servers have no renderer then the mesh is in a permanent t-pose

You can change it at runtime as well if you want to only enable it for a period of time (e.g. during an attack animation)

Unless you need socket positions to always be updated on the server then enabling/disabling it when needed is a good way to avoid too much overhead on the server

[brittle yew]

right now we do an if iOS{DynamicallyLoadedModuleNames.Add("OnlineSubsystemIOS");} else if android{DynamicallyLoadedModuleNames.Add("OnlineSubsystemGooglePlay");} in the build.cs. on a kindle without the google play framework installed we get a startup error message stating that google play is not supported on the device. is there documentation on where and how to check the available subsystem before the error message pops up to change the subsystem to null to avoid the error message?

It throws an error message so i think there should be an exception that gets handled via showing the error and changing the subsystem or disabling its features. i just dont know how to find the code responsible for that and i hope i dont have to edit engine source.

"[Game Name] won't run without Google Play services, which are not supported by your device"

[dark edge]

What is this for?

Bullet impacts?

[cyan drift]

Hello, i am using the advanced sessions plugin for game sessions on steam, and some players are reporting that after a while they are disconnected from the session.
Does anyone know any possible cause for this?

[south rampart]

Do you use the 'Create Advanced Session' node/method or 'Create Advanced Session Dedicated'?

In our case the Dedicated one works perfect and the other one we haven't got to work (still have to look into that one). So yeah not exactly the same issue as yours but maybe it can help 🙂

[cyan drift]

oh, I use the first one, Create Advanced Session

[south rampart]

I think I found out what is causing me such a huge headache. Inside editor it works, outside it doesn't. What suddenly becomes active outside of editor -> SteamParty.

This could cause 2 OnlineBeaconHost implementations to become active. I don't know this but maybe that is a bad idea 😅

[south rampart]

If I may ask? What settings do you use for Create Advanced Session? It has quite a bit of options

Create Advanced Session Dedicated has a lot less options. So I would definitely try it out for your dedicated servers 🙂

@thin stratus so yeah I'm not there yet. The TestBeacons you found are pretty similar to the PingBeacons I found. But it was while I was looking at the TestBeaconHost I noticed it inherits from OnlineBeaconHostObject.
Talk about being confusing. Then I noticed pretty much nobody inherts OnlineBeaconHost. It's this that got me thinking maybe the problem lies there

But alas not there yet :/. It simply refuses to work outside of editor still.

[ancient badge]

hey, i have this funtion that is hooked up with a event tick.
https://blueprintue.com/blueprint/r_qd_f55/
For some reason the "Last Card location" isn't replicated to the Listen Server. So the Actor i'm moving in my Second Player isn't moving on the fist player( the listen server)

[cyan drift]

I'm using blueprint to do, here is the node

[drifting slate]

Do root motion montages work with "Run on server" type multiplayer? the animations arent playing on the client side.

[round star]

Can someone point me in the right direction for dedicated server hosting that works well with unreal engine games

Nice okay

[south rampart]

I'd try the dedicated node if I was you. Of course only for your dedicated servers :)

[round star]

Is there a discord for advanced sessions plugin

For some rason I thought there was but I cant find it 😛

So using a dedicated server host...isn't each 'game instance' require its very own VM

[regal sand]

I have two players in a local multiplayer game using controllers, and for some reason, the second controller does not get input

When I use a keyboard and a controller, they both work as intended

What could be the cause of this?

This function is how I find out what player answers first

[thin stratus]

Small heads-up for everyone actively reading this channel right now: We are splitting the Online Subsystem, Session and Beacon topics from #multiplayer .
The new place to discuss these will be in #online-subsystems

Please re-direct users if you see them not finding the right channel (: And do so kindly!

Yes

[south rampart]

Yes advanced sessions is built upon online subsystem

[thin stratus]

#multiplayer should now "only" handle general Local and Online Multiplayer. Which mostly boils down to replication and the network gameplay coding.

[wispy path]

I am trying to modify the spine bones to correspond to where the player is looking. I found a tutorial online but it doesn't really work for multiplayer. So I tried making a replicated rotator in the character bp and and tried to reference it in the animation bp but it says its not in scope. Is there a proper way to do this or does somebody know a tutorial that works for multiplayer? I havnt found one.

[thin stratus]

I think if you want to use variables in the AnimBP states, you need to have member variables and fill those from the Character

So you can't use your Character reference and get the rotator inside an anim state

You need to grab it in the EventGraph and save it to a variable in the AnimBP

But either way, the look rotation should be available via GetBaseAimRotation @wispy path

it has replicated pitch

[wispy path]

Ah that was incredibly simple. Thank you

[cloud estuary]

When using either subsystem(right now the default one), and opening two separate instances of the game in any mode (PIE, standalone, packaged, etc...), why can I control the character in only one of the instances, and not both?

My setup goes like this:
A gamemode blueprint, a gamestate blueprint, a gameinstance blueprint, and a player character blueprint. The player character is controlled via the Enhanced Input System and takes the player controller ID from the gamemode, which itself uses OnPostLogin to add the new player to an array and then cast that index to a newly spawned player character. I have player spawns with tags from 0 to 3 and I'm trying to use them via the FindPlayerStart node.
Here's the blueprints:

https://blueprintue.com/blueprint/2qbgox_z/

https://blueprintue.com/blueprint/pf0la61g/

Sorry if the english is a little broken, I'm just very tired.

[thin stratus]

Your PlayerIndex that you feed into the PlayerController and PlayerCharacter nodes is wrong

The Index on those nodes is for Local Games

You should use 0 as index

And that is also kinda wrong

[cloud estuary]

I used 0 as well and it gave the same result

[thin stratus]

If you are inside of a Character, you can use GetController to get the relative controller of that

And that also only works on Server and owning Client, cause GetController returns null on other clients

And then BeginPlay is too early to get the Controller, that's what the Possessed Event (server only) is for

[cloud estuary]

It's triggered by OnPostLogin

[thin stratus]

I would also check if you have the same issue without the ALS system

Well, no you have code in BeginPlay of the Character

[cloud estuary]

Oh, right

the context thingy

[thin stratus]

And why is it even trying to get the PlayerPawn

You are inside of the Character

Like, just use "this"

or "self" in BP

That is as redundant as it can get haha :D

[cloud estuary]

Also, ALS isn't in the project

[cloud estuary]

I honestly tried every combination of nodes and just left it out at this

[thin stratus]

PlayerIndex used wrong. Then getting the ID from the Controller, which is the PlayerIndex, and then getting the Pawn, that you are already in

I suggest stepping back from that BP and using a simple Character that has basic Movement Inputs

[cloud estuary]

The entire thing is a mess but I'm just trying to get all the players moving lol

[thin stratus]

And then getting back to it once that works

[cloud estuary]

I guess

I'll try the thing with a fresh project

[thin stratus]

In addition you should make yourself familiar with the Functions you can override in the GameMode

There are a lot of functions you can use to just spawn a Character

The way you currently spawn it you can just leave the DefaultPawn as that class

And not spawn manually at all

Ah well you have custom spawn points

You can override the FindPlayerStart or ChoosePlayerStart functions for that

[winged badger]

and ShouldSpawnAtStartSpot, or the first 2 won't work 😄

[cloud estuary]

Oh.

Yep, seems like the player controls work just fine in a LAN listen session with two instances open of a default third person project

Thank you guys for helping

I'll get learning :)

[fierce elbow]

I've been having troubles changing a value on a clients PlayerController through BP..

I'm basically spawning a player using a UMG widget based on which team they select. I set the PlayerController's TeamID before I pass it to my spawn function, but once inside the spawn function it's showing TeamID as the default -1 that's set in the constructor and not the value we passed in. It seems to work for the server player but not the client
TeamID is replicated. I've even gone so far as to declare a BlueprintCallable function that sets the TeamID within the PlayerController itself but I still only get -1 when spawning as a client

Am I just approaching this the wrong way?

[kindred widget]

@fierce elbowYou're setting the value from input. Input is on the client. Spawning is done on the server. Server has no idea or care what the client's value is. You have to set the ID on the player controller on the server.

Replication is one way, Server to Client. The one and only way a client can ever talk to anything else is through a ServerRPC through an Actor that the server has set that client's playercontroller as the owner of. Clients cannot do anything else. Anything done on them will be ignored by the server, or overwritten from the server onrep if that value is ever set on the server.

[fierce elbow]

Ahh yea, I'm still pretty new to C++ in general and I just assumed because I was passing the controller to the function afterwards that the changes would be reflected, but I guess it's still going to grab the server's version of that controller and not the clients version.

I added a team parameter to the function and set the teamID on the server in the spawn function and it works now.

Thanks for your help (:

[cyan drift]

Can someone tell me if a player reaches a certain ping limit he is disconnected from the server?

[south rampart]

I did not do it myself but I think we have it set to 300ms. Maybe it is through advanced sessions and the default is even lower?

[cyan drift]

Do you know where I can set this?

[regal sand]

If I am running a function on the client, and I need to send the output to the server, what replication type is that? Client RPC?

[kindred widget]

@regal sand The type is always the destination. So in this case if your client wants to send something to the server, you need a ServerRPC.

[regal sand]

Ok cool. thank you

Can I write that function in the gamemode, can call it from the client, using it in blueprints

[south rampart]

No. It was the lead programmer who told me about the limit. I can ask him on monday ;)

[cyan drift]

I would be very grateful if you could ask him

[warped berry]

on the server all player states have a Net Mode = NM_Client , right?

[meager spade]

no

server will have NM_ListenServer or NM_DedicatedServer

what made you come to that conclusion?

[warped berry]

because there's the HasAuthority() I thought it should be different!

I mean when to use the Role and when to use the net mode, there's no difference then, right?

[meager spade]

there is a lot of difference

an Actor will have ROLE_Authority on whatever spawns it

so a client can have ROLE_Authority actors.

when connected to a multiplayer game, you can always rely on GetNetMode to return NM_Client if its a client, or < NM_Client for any type of server.

but roles are also crucial

ie, if an actor is LocalRole ROLE_Authority and RemoteRole is ROLE_AutonomousProxy, then we know that actor is the server version of a clients locally controlled actor.

if LocalRole is ROLE_Authority and RemoteRole is ROLE_SimulatedProxy, then we know this is the servers version of a replicated actor that simulated proxies see.

[warped berry]

like a player controller yea, but on the server the player states of all other clients would have NM_ListenServer or NM_DedicatedServer!

[hollow eagle]

You can't have different net modes per actor

[meager spade]

that is not possible

[hollow eagle]

netmode represents the local program's mode of operation

it doesn't say anything about the actor

[meager spade]

the server will always have NM_ListenServer or NM_DedicatedServer

GetNetMode is based on the NetDriver

not the actor.

Single player, non network game, will be NM_Standalone

so yes, the server will have NM_ListenServer or NM_DedicatedServer for the playerstates as you said

it will also be ROLE_Authority

on the actor.

[warped berry]

yea okee, so I'm iterating over PlayerArray and I wanted to know which player state is the host's one

[meager spade]

you cant do that 😄

tho granted host is normally the first one

but i would not trust that

[warped berry]

yea because it doesn't replicate same order everytime

[meager spade]

it doesnt replicate at all.

PlayerArray is not replicated

[warped berry]

ah yea it gets filled locally, I meant like when the GS does

[meager spade]

when a playerstate replicates, the PS tells the GS to add it to the PlayerArray

[warped berry]

but why cant I check for the net mode here?

[meager spade]

anyway to find the host, you need to cache who the host is

cause it does not work like that.

btw listenserver is always the host

if your dedicated server, you have no host.

so not sure what the problem is?

[warped berry]

yea I don't have a dedicated server

[meager spade]

you mean you want clients to access the host player?

that sounds like a bad design choice, unless its for a widget

[warped berry]

the thing is: I wanna make a lobby when the host can have a kick button on all other players but not his own item in UI xd

[meager spade]

then like i said, you want to flag the listen servers playerstate with some bool.

We use steam, and i have a function that the UI asks steam who the lobby owner is, and sends in the users steam id, this returns true if that is lobby owner

so i can show the kick buttons, etc

[warped berry]

hmm nice xd, I use steam too, but idk, I didn't want to put subsystem code in UI

[meager spade]

wrapper functions 😄

you could cheat a bit

if GameMode is valid

you are host

if not, you are not host

job done, hacky af, but it will work.

[warped berry]

haha koool

[meager spade]

works ok for listen servers

another thing you can do

use the IsServer bool

if that is true, show kick buttons

else, dont show them

a non-hacky solution

[warped berry]

that bool is in steam right?

[meager spade]

no

right click any BP

and type IsServer

if that is true, show kick buttons, else don't

[warped berry]

in c++ it is in gameplay statics?

[meager spade]

or just do GetNetMode() != NM_Client

in the widget

bool bShowKickButtons = GetNetMode() != NM_Client;

[warped berry]

oh that's why I started to ask here cause I used that but it just hides them all

[meager spade]

that will not hide them for the listen server

listenserver netmode is always < NM_Client

unless you never join into the game

and this is pure lobby

if you are not connected to the host, via open <steamid>

then you need to mark the playerstate of the lobby owner

and check that.

[warped berry]

yea true, though I get the net mode of the player state from PlayerArray

thank youuu, I will try these solutions and see

[merry steppe]

heya, I've been researching this the past couple of weeks and I'm wondering whether there is a best practice for this.

In the multiplayer combat action adventure we are making the attacks move you forward similar to how it is in Dark Souls or Fable. You can chain your attacks, which means you can interrupt your first attack after a point and start a 2nd attack.

The problem I'm having is that if I use animation root motion then there's gonna be a desync as the client interrupts it's own ability, that the server receives later, so root motions do not end at the same time, hence why the desync.

Am I doing something wrong with the animation root motion cancelling or is this a scenario where they are not as useful for network replication?

[twin juniper]

Anyone know why calling "DestroyComponent()" from a server function isnt replicating down to clients? Trying to destroy a sphere collision thats being used to test overlap for picking up items, goal is to prevent equipped items from being picked up. Currently the comp gets destroyed on the server but still exists on the clients allowing other clients to yoink the item from the players hands/body/etc

[peak sentinel]

I'm totally not sure but afaik components are not replicated like actors on spawn/destroy

Actually that makes sense since components are initialized on actor spawn, Epic might never needed to replicate it

So you might need to use a multicast

[twin juniper]

@peak sentinel hmm interesting, I will keep messing around with multicasts and see if I can get that to work. thanks!

[peak sentinel]

Dont forget to check if the component is valid or not on multicast

Only attempt to destroy component is valid

Good luck

[half jewel]

disabling collision via rpc or a bIsEnabled repnotify might be quicker then creating/destroying a component during gameplay

[twin juniper]

@half jewel yeah I think any of these solutions would be fine, just having issues getting anything I do to this component to replicate to clients, whether from server function or net multicast

[cyan drift]

Hello, i am receiving a warning on output log saying that there's no owning connection for actor and a function won't be executed. Anyone know how can I solve this?

[sinful tree]

That message usually has to do with RPCs on actors that are not locally owned. eg. A server spawned copy of an actor that is trying to call to owning client.

[twin juniper]

https://drive.google.com/file/d/1wR-JgeCyb3qaftfpxvXJIqTvkkgtQv9d/view?usp=sharing I have an AI using a standard Behavior Tree node (MoveTo) but it looks like it's rubberbanding, the AI is just inheriting from ACharacter so I don't know why it's behaving like this, first time I have to deal with this

[dark edge]

Just filter the overlap. Put the larger overlap area on the character. I use a different collision profile for equipped and in-world items so they don't even show up

[pearl moon]

So I'm at the point in my game where I'm ready to start setting up a dedicated server to host game sessions for players. I've taken a couple of courses and did some minor research here and there with the overall functionality of unreal's built in multiplayer features. However, I haven't really found any clear examples of how to set up a server / client model that allows multiple connections over internet or just over LAN. Are there any built-in unreal engine functions or BP nodes to allow you to send and receive objects or other data to another separate unreal project? Closest I found was a plugin called Object Deliverer, but haven't been able to get it to work over a LAN connection to my server running the other unreal "game"

[hollow eagle]

If you're just setting up a dedicated server, why are you trying to communicate with a separate project?

[round star]

Let me get this right. A benefit of a dedicated server is that it doesn't have to render the game, only crunch the logic and replicate data to clients. In theory, does this increase performance of the logic then?

[hollow eagle]

It means the process has to do less overall. That may increase performance (if the game is gpu-bound), but it also means the hardware requirements for the server are lower (no GPU required, more servers can fit on a single VM/machine or you need a smaller VM size/lesser hardware).

Anything related to visuals (that doesn't affect gameplay) can also be turned off which means the server has to do even less.

[round star]

I need to hire someone or a team even to do networking ugh

Listen server stuff is simple enough I can do most of it..but when it comes to managing a dedicated server I just ...idek where to begin

Im at a part where I am just seriously overwhelmed. I've done everything myself and now I feel lost and have no idea how I am going to do networking

[edgy valve]

Hi Guys, does anyone have any links where i could learn how to expose some functions from the steam API to blueprints , i have no experience with C++, So far i have learned how to expose a function to blueprints, but to use the steam sdk and expose its functions looks very complicated to me, any help would be much appreciated !

[peak sentinel]

I never developed someting for a dedicated server but it should be simple as

if(GetOwner()->GetNetMode() != NM_DedicatedServer) // if nm is dedicated server dont run
{
  // something related with rendering, particles, decals etc.
}

[peak sentinel]

Check out Advanced Steam Sessions

It should be exposing them to BP

[edgy valve]

Man i was doing that just now haha, I'm overwhelmed with all this information man... I will graduate next year, i've learned java and i thought i would be able to learn the different aspects that C++ has, but honestly man... I feel like i can't call myself a programmer, C++ is SO different from java there is so much stuff that i never heard of, i'm feeling really sad today, this is the first time i feel like i have lost all hope😢

[peak sentinel]

Never worked with Java, but from what I've heard its just very similar to C#, UE's C++ workflow should be easy to understand after a while

Check out Cherno's youtube channel, he explains core structures of C++ very well

[distant talon]

you dont really need to do much special gameplay code wise for a dedi though, is there anything in particular you are stuck on?

[round star]

It's really just trying to find a host and how all that works. I have no idea how to manage running a game on a vm

it feels so daunting

[distant talon]

Ah yeah, that can be annoying. It's often easier to just grab a spare computer and throw your dedi on that especially at first

or running it in the background on your dev machine can work too if you only need the server up now and then

[wanton marlin]

https://tenor.com/view/fortnite-thanos-orange-justice-dancing-dance-gif-16354935

I watched a video on networking

[shy aspen]

@round star don't be discouraged - it's not as difficult as your mind might make it out to be 🙂

[hoary lark]

you don't have to do pre-hosted cloud servers like AAA games do... self-hosted dedicated servers (used to ) exist too FYI 😄

sounds like you're trying to wrap your head around building your dedicated server package and also renting a VPS or something to run it

[thin stratus]

@edgy valve @peak sentinel Try to use and redirect to #online-subsystems for this in the future please (:

[peak sentinel]

Okay eXi, thanks 🙂

[ancient badge]

Hello, can anyone tell me why my "Print String" is giving me the right numbers for the "host" player but only 0 on XYZ for the "Connected" Player?

This is inside of the "Player Controller BP"

Trigger Event is a RPC with "Run on Server"

[twin juniper]

@winged badger @bronze summit @hybrid zodiac Thank you.It worked like a charm.

[sinful tree]

The server wouldn't know about where the mouse position is on a client's screen. You'd have to replicate the position (and direction) through your RPC.

[ancient badge]

@sinful tree So, make them to a Variable and set them to "replicate"?

[sinful tree]

Setting a variable to replicate means that the server when setting a value on a variable will set the same value on the client. You're trying to get a value from a client to the server. Add vector inputs on your "Execute on Server" event node.

Then you can pass the values from the client:

Then you'd have to add those inputs on to your function as well:

[ancient badge]

@sinful tree Thank you very much! i checked all my variables but never even thought about this two.

[hybrid zodiac]

@twin juniper You're welcome! Good luck!

[twin juniper]

Thank you

[digital current]

What is the default region (the one you set in the downloads tab) when you create a session on steam server browser?

and where can I change it

[twin juniper]

is there a special way I should be passing actor references to a net multicast function that gets called from a server function? The server function spawns an actor to the world, and tries to pass a reference to the net multicast function, but the reference is invalid for all clients but is valid for the server

[twin juniper]

^ still not totally sure what the problem here was but I fixed it by calling the server function from the actor itself rather than the character/actor that owned it

[silent valley]

I'd be careful I don't think there's any guarantee the new actor will be replicated before the RPC is sent. It will probably break in weird and wonderful ways.

Better to decouple it. Create the replicated actor on server, and in BeginPlay on clients have it register with some system that needs to know about it.

Or store pointer to the new actor in a replicated var and it will eventually resolve on clients it is relevant for.

[hollow flicker]

Hello, in this current ,,system" my server is able to do everything as planned (dig up a chest), and the client sees everything. My client can dig up that chest aswell, but the server does not see it happening. How could I let the server see the change aswell or just always let the change happen on the server?

[kindred widget]

@hollow flicker You shouldn't be calling server RPCs and then doing the same thing on the client. Not without a thorough understanding of prediction methods. Keep things simple. Handling controls like this in the overlapped actor can work, but you also need to handle how your RPC to server. For instance here, with your exact setup, if your client walks over this actor, even your server can press Y, cause you're enabling it on that client and the player0 on the server.

Also here, if your client overlaps and presses Y. What is happening and why the server doesn't see it, is that you're pressing Y, calling a server RPC, then doing the logic locally. The issue is that the RPC is never going through. That client does not own this actor, and therefore cannot send RPCs through it. So the RPC never actually happens.

@twin juniperPart of your issue is calling RPCs shortly after spawning. RPCs are sent and forgotten. If the RPC arrives on the client before the actor replicates to it, the pointer won't be valid.

[south rampart]

Come to think of it, I suddenly remember he told EasyAntiCheat does this. Do you use an anti cheat system?

[hollow flicker]

I now disconnected the event calls from doing the logic locally, but now the client obviously cant do the logic anymore. How could I make the client do the logic now?

[south rampart]

It would be weird if advanced sessions disconnected players by default for high ping

[kindred widget]

@hollow flickerThe client would need to own the actor to call RPCs from it. You can set this on the server from the overlap, or you can reroute the RPC through some more generalized function in your client's controller or character.

[drifting slate]

I'm having a similar issue to Bruce. My client cant see the server attacking, but everything else seems to work fine. Here is mine to add to the picture. This is all in the Character Blueprint.

[hollow flicker]

How would I set the client as a owner after the overlap?

[thin stratus]

Can more than one Client use that Actor, Bruce?

[kindred widget]

You could make an assumption that if it's overlapping on the client, it'll overlap on the server. Can be safe for handplaced things. You just set the owner as the overlapping character's controller. But this will lead to issues with the last or first character always having control.

[thin stratus]

Like, can 2 stand in the Overlap and interact with it?

Generally, there is little need to set an Owner on overlap, unless it's an Actor that is picked up and only belongs to one player for that duration.

The better idea is to have a place in your Controller, or a Component on that, through which you route RPCs

And to already RPC in the Character when starting your interaction.

E.g. Press E -> RPC -> LineTrace
or Press E -> RPC -> Interact with current overlapped Actor

The RPCs shouldn't need to happen in the Actor you overlap

And it will become problematic if you have an Actor that needs to be interacted with from more than one Client at a time

Because only one can own it at any given time.

It's safer to just not use the SetOwner function then, and RPC in the Character/Component/Controller/whatever fits your system

[hollow flicker]

@thin stratus Two players could stand there and interact with it, yeah. I didnt know there could only be one owner at a time, just setting the owner probably wouldnt be a good solution then. How would I go about routing RPCs through my Character?

[toxic lion]

I'm having some trouble debugging an issue here
I'm working with Logic Pro, and on a state, I am choosing a waypoint to move to, and then traveling towards it

Here is the logic for choosing the waypoint

The problem is, that the point chosen in the Chose Next Patrol Point function, and the returned value in the state are often different

[thin stratus]

As said, when the Player presses the key to interact, you can instantly RPC to the Server in the Character and then do the rest

[leaden atlas]

where in the code does the client send the request to join the server?

i want to change the login URL that the client sends

[thin stratus]

You mean when you call JoinSession?

[leaden atlas]

is that what its called?

[thin stratus]

Idk what you are doing so

[leaden atlas]

i dont know how the client connects to a server

is that in game instance?

[thin stratus]

How are you connecting to a server to begin with

[leaden atlas]

open ip:7777

[thin stratus]

Then you can just pass stuff along there

open ip?Key1=Value1?Key2=Value2

But you need C++ to retrieve that in PreLogin and Login in the GameMode

[leaden atlas]

yeah

i want to change it so that it stops sending the computer name basically

[thin stratus]

There are other ways to do that

You could just override how the PlayerName is returned

[leaden atlas]

i'd prefer not to

[dull lance]

Why is not sending the computer name important?

[hollow flicker]

When I now press the key in the character, it calls the event in the actor blueprint. Is that what you meant?

[leaden atlas]

my playtesters dont like it

[thin stratus]

Well yeah, but instead of calling it directly in the Actor, you RPC in the Character and then call it on the Actor

[dull lance]

Hmm, are you using their computer name as a "player tag/ID" in game?

[leaden atlas]

im using PlayerName from PlayerState

the client seems to send the computer name as part of game mode login

[dull lance]

For test builds that are not implementing a specific / finished subsystem, I usually just assign random names and store them

The online subsystem eventually takes care of that (steam/aws/etc)

[leaden atlas]

i might end up using the null subsystem

or whatever is it whenever you dont use one

and just join by IP

are the unreal docs down?

[dull lance]

their websites have been rocky this past week, a lot of 404's

[leaden atlas]

eugh

[dull lance]

Either way, I'd just assign them a random name on join and use that instead

until you have a production-valid user name assigning method, their names don't matter

[leaden atlas]

im just curious like, where in the code

[thin stratus]

Best thing would be just override the part that forwards the PC name

[leaden atlas]

yes exactly

that's what i want to do

where in the code does it send the computer name as part of the connection URL?

on the client side?

i found where it receives it on the server side but i cant find the code where it sends it on the client side

[thin stratus]

I would check the LocalPlayer class

[dull lance]

That, and/or you might be able to find it by searching the declaration of the open IP command , then follow that line of instructions

[thin stratus]

open ip is a bit overdoing it

Becaues that's really hard to follow

Just check the ClientTravel function and go from there

Sits in the PlayerController

[leaden atlas]

ClientTravel is actually a lot more helpful

i can just breakpoint that and look at the callstack

thanks

[thin stratus]

It's further down the line

There is a function in the LocalPlayer to return options when connecting