multiplayer

[ashen stone]

Nice 🙂

https://www.youtube.com/watch?v=tS9P_PqHCwM&t=389s

If you want, you can play my mmo on unity

it is online right now

https://www.talesofshadowland.com/

anyway, thank you for your response

https://www.youtube.com/watch?v=rYFXzNh2nwk this is online too and made by me in unity

[timber anchor]

Hey guys, i'm currently testing with steam and andvanced session, but the client has this stuttering movements, anyone knows why? ^^ Ping was 9999 tho, makes a bit of no sense

[twin juniper]

Hi guys, any tips for replicating physical objects that get thrown around? what would be the best approach

[dark edge]

Define thrown around? Do you need any sort of prediction or is server authoritative movement fine?

You can just replicate the physics movement, tune it in project settings under "Physic Replication Settings" yes it's a typo but that's what it is.

[twin juniper]

@dark edge I would say something like in the game portal where u pick up an object and launch it

Not sure about prediction but I want clients to see the same thing

I guess I could replicate the movement but would it be too heavy if there are like 20 physic objects in the map?

[dark edge]

Nah that's nothing.

[twin juniper]

K what about 60 👀

Don't they get track every tick?

[dark edge]

Idk, go test it. You can set the replication rate yourself.

[twin juniper]

Which setting would that be? Sry first day doing multiplayer

[dark edge]

If it's your first day doing multiplayer I 100% cannot recommend trying to do multiplayer with physics.

[twin juniper]

Also the server side sees jitter, I change some setting and make it better but still not smooth as client to client. I suppose this are common problem?

[dark edge]

I'm assuming you are using a character that uses the character movement controller? So you have kinematic movement but also physics involved? That sounds like a nightmare

[twin juniper]

I'm using Advanced locomotion system 3

Most of the stuff r replicated already

[dark edge]

That's prolly kinematic. I'd reconsider using physics unless your game is centered on physics and just treat things as projectiles instead.

[twin juniper]

Yup that's what I want, a projectile

Prefer if it behaves like a physict object tho

The ghost would be throwing things around the map

[dark edge]

This sounds like a absolute pain in the ass to get working smoothly in a multiplayer setting, good luck

[twin juniper]

Kay, thx for the answers

Oh btw do u know what I can tap to fix the jitter issue on server side?

Client to client sees everything fine

[dark edge]

Not without knowing how you are picking up the objects.

[twin juniper]

Not the objects it's the player movement

https://forums.unrealengine.com/t/clients-jitter-on-listen-server/343826

[dark edge]

Oh no clue, I'd ask in the ALS forums. You're saying everybody sees everybody else butter smooth except for the host?

You aren't replicating input, correct? You are just applying it to the movement system locally and letting it handle the replication?

[twin juniper]

The problem isn't limited to ALS, even the default TPS suffer the same issue

[dark edge]

I've never noticed it, does it happen in a bone stock template project?

[twin juniper]

I will check now

it has something to do with FPS too

https://www.reddit.com/r/unrealengine/comments/3ag9bt/jittery_interpolation_on_the_listen_server/

Yup it's the same thing

U can just start from Third person template. Launch as listen server with 3 players. Then watch movement on every window. Clearly client to client side is smooth while listen server sees jittering

this has been a common problem in multiplayer for soo many years without a lot of people addressing it. Kinda what dissuade me to work on MP before, but i just hope dedicated server fix this issue (maybe that way the player 0 doesn;'t have to play as listen server)

[dark edge]

We've never noticed it but we also only ever test by launching. Might be a pie thing

[twin juniper]

👀 so u test the game with package or launch everytime?

doesn't that take ages

[thin stratus]

Launching is just right clicking the uproject file and clicking launch. Or even faster making a bat file and using that.

Packaging, based on your team and project might be done over night by a build machine (:

The ListenServwr jitter issue is annoying. I looked at it in the past but couldn't figure it out either. Only thing I always change is the ticking of the pose through net updates. Idk what solution I did in the end...

[pallid mesa]

I gathered some notes here in the past from an analysis a slackers user did

ofc I couldn't verify this myself, but maybe this enlightens the situation

#gameplay-ability-system message

[royal vault]

Hi Adding Statitc Mesh Instances with an rpc seems to be working fine on both client and*server

However

Removing instances

with onrep or multicast

isnt being shown on clients

only the server can see the changes

those onreps and multicasts are all being fired on server btw

Any ideas on how I can get the client to see the changes?

\

If i print out the changed values from the client

they are all seemingly correct

its just the client cant see the physical changes

[slate basin]

Hey, does anyone know what's the best way to have a spectator pawn that you can fly around with?

Do I have to use the floating pawn? Since the spectator pawn doesn't seem to only let your focus on other players

[low helm]

You can just make your own

Set actor location on tick, location+momentum*worlddelta

But floating pawn should be fine too

Just remember that all non characters don’t come with proper server correspondence, so the server won’t know where you are by default, which means other actors won’t properly net distance cull

Without a solution

[low helm]

What object is this on

There are lots of little problems with your setup, removal of indeces can cause 1000 problems in multiplayer

Also, the multicast is sending clients a reference to the ISM that I suspect is not valid because instanced static mesh probably isn’t replicated

I have a lot of experience with replicated ISM crap, it requires some unusual approaches

Like setting scale to 0 instead of deleting

PM me for more follow up

[peak star]

What's in your opinions the best way to manage a project so you can build it for Steam on PC and for non-steam on Android (since having Steam online subsystem makes it unable to build for Android)?

[ashen stone]

Is it possible to make PreLogin async to check for credentials on database first?

[ashen stone]

Is setting the player pawn to spectator until auth accept him the right way on unreal?

[sinful tree]

Don't have to give them any pawn unless you want to. You can set in the game mode none for default pawn, and then spawn in the appropriate pawn and have the controller possess it when you want.

[peak star]

Would I need to split it into two different projects? Is there a way to tell the build process to include or exclude Steam OSS when i build? Or do I have to have that in place or not when compiling the project rather than building the app it makes?

[ashen stone]

You can use #ifdef in c++

Search for conditional compilation

[blissful totem]

When doing multiplayer tests in the editor, the state of the game seems to shift when I enter simulation mode. Why is that exactly? Is the simulation acting as a client or something?

[neon ether]

Question: if you call a function from within a server rpc, does the function called also only get ran on the server? If the method is being called by using a passed in actor reference and that reference is being used to call the function does the role of that actor matter, and if so what ways does it matter?

[kindred widget]

The actor pointer you pass gets compressed into a NetID and uncompressed on the other side of the RPC before the function call. This only works for replicated actors. Once you are in the body of the ServerRPC, you're on the server machine.

Generally passing a pointer that gets resolved into a NetID and back into a pointer is safe for client to server. You have to be careful with this for server to client though as the RPC can reach the client before the object has a chance to replicate there, leaving your pointer null on the client.

As for the role of the actor mattering. Not really. You sent an actor pointer from client to server. It's role on the client is irrelevant as long as it is a replicated actor.

[knotty mason]

hey everybody!

i want to set gravity off (extremely preferably only in c++) for only one client, but PlayerHost->GetMovementComponent()->GravityScale = 0 works only on server (and afaik it turns gravity off not only for PlayerHost, but also for all clients) -- how can i turn gravity off only for 1 client and not for anybody else?

[neon ether]

Thank you so much! Perfect answer!

[gritty pulsar]

Hey, has anyone used Keycloak or something similar for login? I was planning to use Amazon Cognito but not being able to export users gonna be a problem in the future.

[peak sentinel]

Do you want to desync server and client position?

[knotty mason]

i want client be able to walk on the air while server will still walk on the ground -- they will both see each other the way they actually exist in world -- client in the air, server on the ground

[peak sentinel]

CMC does not allow that type of movement

[kindred widget]

It does.

[knotty mason]

not really walk, but i just want to disable gravity (i'm implementing wallriding and when you are attached to the wall you don't wanna fall but you kinda stick to it and your Velocity.Z = 0)

[kindred widget]

Movement Mode flying.

[peak sentinel]

I didnt understand if client wants to be somewhere else while server seeing it in somewhere at first reading, sorry

I hit the language barrier on the last sentence

[knotty mason]

thanks, but it still only sets server flying, client is still affected by gravity

[peak sentinel]

Try sending a server RPC

if (!HasAuthority())
{
Server_SetFlying());
}

and let server_setflying call that setmovementmode

[graceful flame]

If a game running on a dedicated server has to send half the players of a session to a new level and the other half back to the main menu how can the session remain for the half still playing if the main menu calls Destroy session during event beginplay? Is that possible?

or will the entire session end for all players?

Use case is winning team moves on to a new level and losing team gets booted back out to main menu.

[knotty mason]

im sorry maybe its dumb question but:

i couldnt find server_movementmode in https://docs.unrealengine.com/4.27/en-US/API/Runtime/Engine/GameFramework/UCharacterMovementComponent/ and in rider (because they are the same obviously)

[peak sentinel]

You need to declare that yourself

Tbh I didn't dive into movement modes too much, maybe CMC has its own function to call some RPCs for you but if it it doesnt, you just need to create a Server function and call it if you are client

UFUNCTION(Server, Reliable)
void Server_SetZeroGravity();

[knotty mason]

thank you very much!!!
it worked 🍺

[glacial shuttle]

The players that you, destroy session on, are ending their session. So the session will continue for the others still connected to session.

[ionic coral]

im trying to do name tags but it is just not working
The host can see the names but every name is the same and the people that join cant see the names

(for the ui)

[twin juniper]

Hey, is there a way to make sure SET w/ Notify's callbacks get called like a reliable multicast event?
Or should I just convert it to a reliable multicast event? seems kinda unnecessary because it's doing all the calculations needed for setting that variable, however I need to make sure all the OnSet callbacks get called, (So I won't miss one if it's quickly Set to something else before it replicates...)

[ashen stone]

#if UE_SERVER

[kindred widget]

You're using GetPlayerCharacter0 here.

[ionic coral]

whaa

there is a get player controller

[kindred widget]

In beginplay. Which is ran on both server and client, and setting a replicated property.

Same difference. Different actor.

[ionic coral]

i dont understand

[kindred widget]

GetPlayerController returns the local controller on a client. On a server it returns the first player that joined the server.

[ionic coral]

ohh

its fine now anyway i just removed it, it got too distracting well playing because the names are pretty big

so i just added a death thingy in the corner that show when a person is killed

[kindred widget]

Also, how come you're not using Playerstate's name?

[ionic coral]

who killed them and what gun

[ionic coral]

i like to make it easy for me to understand so i just use player name variable that is just a string that is set to the persons steam username

[kindred widget]

That's all the player state's is. Pawns and controllers have access to their relative playerstate as well.

[ionic coral]

ahh

eh if it works there aint no need fixing

[kindred widget]

Fair enough. 😄

[mortal kernel]

What role have AI controlled entities? I'm unsure rn... is it authority? or...

[kindred widget]

AI controllers don't exist on clients.

Oh, controlled. As in the pawn itself?

For the pawn, same as any other actor. Server has authority, as that's the machine that "spawned" it. Clients version would be a simulated proxy.

Unless you're spawning it on the client specifically for some reason, then it'd have authority on the client and no other role anywhere else.

[mortal kernel]

o-o Alrighty

So I'm currently trying to replicate pawn movement it's working in bp but not in cpp

// Called every frame
void AAmbienceCorePawn::Tick(float DeltaTime)
{
    ActorDeltaTime = DeltaTime;
    Super::Tick(DeltaTime);
    
    if(!HasAuthority())
    {
        Server_SetLocation(GetActorLocation());
    }
}

void AAmbienceCorePawn::Server_SetLocation_Implementation(FVector NewServerLocation)
{
    if(UKismetMathLibrary::Vector_Distance(NewServerLocation, GetActorLocation()) > 15)
    {
        Client_SetLocation(GetActorLocation());
    }
    else
    {
        Location = NewServerLocation;
    }
    
}

void AAmbienceCorePawn::OnRep_Location()
{
    SetActorLocation(UKismetMathLibrary::VInterpTo(GetActorLocation(), Location, ActorDeltaTime, 15));
}

void AAmbienceCorePawn::Client_SetLocation_Implementation(FVector NewClientLocation)
{
    SetActorLocation(NewClientLocation);
}

Any guesses?

[kindred widget]

Not sure. Don't see anything actually moving it on the server. If it is moving on the server from something else, then I'd assume that it's not replicated somehow. Also worth noting that your current setup can be achieved with just checking the replicates movement checkbox.

[mortal kernel]

but it's a pawn and clients can't move by default

it even says here :o

But you're right I got confused a little I'm only setting the location OnRep which would mean on clients

[half umbra]

can i use stream level bounds volume only for map visibility?
I'm creating a multiplayer game
I would prefer the map to be always loaded
and only visible when a player enters a field
won't such a practice hurt in multiplayer?
?

and can anyone tell me what to look for when using streaming level in a multiplayer game?

[rocky night]

🍑 Got a Problem. In Multiplayer i have items liek a Teddy- if in a 2 Playermatch a Player takes it sometimes it goes to another player and not to the Player who picked it up. Is there a way to get just the Plaayer who is picking it up and avoid teleoprting items to other players simple?

i check the Parentplayer from the 4 players who are childs if he owns alreaddy the item or is holding one too

[fathom aspen]

I don't get why you're using two events to implement this functionality. Event Interact should be enough with the Instigator as the player who did pickup the thing.

[rocky night]

Yes i hooked after the delay it also i. The cast to assault… but happens too

The overlap is for open the Gate to pick it up

This cracks my game totally

I call this code in the item… btw

And it’s replicated

[sinful tree]

You really shouldn't need an overlap check.
You're probably doing a line trace as it is to determine the actor to perform the interact on - you should be able to calculate the distance of that line trace, and if the player is close enough, then you should allow the interact interface to proceed.

[rocky night]

I have the collision also for a fresnel so it glows when the player is closer

But also when i hooke the fresnel and gate logic out it happens

[sinful tree]

Well, as it stands, you can't do this. Any time another person overlaps, it breaks who the interact is really from so your cast is only ever fed the last person that overlaps.

[rocky night]

Oh?

[sinful tree]

Also, you need to separate logic from clients and server on overlap events. When a player overlaps, that event is triggered on the clients and the server. You can use a "Has authority" switch to determine if you're running on the server or on a client machine.

[rocky night]

Does has authority work to with 4 players?

So 1 Server 3 clients

The event interact repliates aswell unfortunately

[sinful tree]

Sure but you need to understand that "has authority -> server" means it'll trigger on the host of the game. "has authority -> remote" will trigger on the clients that also detect the overlap.

[fathom aspen]

Are you using a dedicated server or a listen-server?

[rocky night]

Listen Server

[fathom aspen]

Yeah you need to make sure you run a has authority check as Datura told you.

And use the Remote pin

[rocky night]

the remote pin?so if i trz it it doen picks up on server or client... and i need to sedn to the player who picks it up sever things, like show the item in hand, set bollean to true if he owns now the item ect

[rocky night]

ok i understadn but if they are 4 players will the remote pind wont cont for the 3 of them?

[fathom aspen]

Switch has authority has to be on the overlap event

[rocky night]

@fathom aspen

@sinful tree i also changed the pin from cast to to the INSTIGATOR of the Event Ineract

it goes now trough also as server maybe thats the sulotion? cant always replicate the teleporting error but this time it dint happen

[sinful tree]

Interaction should follow along something like:
Player presses "Interact" button > sphere or line trace from player's location to (camera's forward vector * interact max distance) > If there is a hit actor call a "Run On Server" interact event that passes the actor from the hit event of the line trace > Server verifies passed in actor is within interact range > Calls Interact Interface on the Actor
Actor with Interface > Does whatever it needs to do as it's running on the server.

Overlap Event (if it's something visual for the player overlapping) should not have anything to do with the interact interface. Doing something visual with the overlap is getting a bit more complicated as you would also want your host (the authority) to see the visuals as well I imagine, but you only want the visuals to appear on the machine that is currently overlapping. To do this, I think you could cast the "Other Actor" to Pawn (or whatever character if you intend on doing something with it) and do "is locally controlled" and if true, change the visuals. Same with the OnOverlapEnd event - you'd want to check only if it's the local player that's ended the overlap.

[rocky night]

ok i seperated nw the interatlogic with the Sphere collision seems to work?

[slow wing]

What is the console command for adding latency? Google lead me to "net PktLag" but this option doesn't come up in my list of console commands (nvm found it, it's NetEmulation.PktLag)

[graceful flame]

I have two parent characters in my multiplayer game. Is it normal for the character blueprints to have hard references to the PlayerController, the PlayerState, and GameState? Am I doing this right or am I creating too many references? I can't seem to figure out how else to get all that data to reach them. I'm mostly calling the state I need and then firing off a custom event, I'm using some event dispatchers as well.

Should I be refactoring into using more interfaces?

I'm using each reference more than once to get and/or set data according to some condition.

Is it best practice when developing a multiplayer game to NEVER use casting to make references between the GameMode, GameState, PlayerState, PlayerController and Characters?

[fathom aspen]

There is nothing like that to "NEVER" use casting to get all these game framework classes.
If you feel like you're having too many casts going around then you should consider using interfaces instead.

[graceful flame]

Well I'm always storing whatever I casted to as a variable and use it more than once.

[fathom aspen]

That's ok. You're using the same variable.

[graceful flame]

Like does it make sense to make an interface between the playerstate and gamestate that only gets called twice per session?

[fathom aspen]

It's more like a preference question. But my answer would be no.

[graceful flame]

ahh okay

It's been working alright so far, but I think it would be better for performance to refactor away all these references into interfaces whenever possible.

But that would mean creating lots of interfaces, which I guess is okay...?

[fathom aspen]

You don't gain any performance doing this refactoring or at least it's not a significant factor as you think it is

It's more of a design issue

[graceful flame]

I think I understand it a bit better now, its only "bad" if a reference is made but never called. Then I'm wasting memory, is that correct?

[fathom aspen]

ye

[graceful flame]

For example, something is casting to something else then sorted as a object reference variable but never gets used once during the session because of the current GameMode.

[fathom aspen]

Yes sure

[graceful flame]

Thanks for verifying this for me

[ashen stone]

How do i replicate an array (List of Items) only when player open stash or talk to vendor?

Do i need replication graph for it?

[hollow eagle]

No. You can either use custom conditional replication, or the simpler solution - just use an RPC to send the data over when it's needed if it isn't being constantly updated.

[ashen stone]

i`m doing this

i have an ItemContainerComponent, it is on character (inventory) and on stash (StashItems)

But on vendor it is possible for many players open the same vendor at same time (and they need to see the items sold in realtime)

Is it a good idea to have a list of interest actors inside the component?

[meager spade]

i would use a FastArraySerializer

[hollow eagle]

you can use network relevancy https://docs.unrealengine.com/4.26/en-US/InteractiveExperiences/Networking/Actors/Relevancy/

(if the whole component is only relevant at specific times to specific people)

[meager spade]

much simpler than handling this stuff all through rpc's (and RPC's won't work on NPC's).

[ashen stone]

i need to use maps because i need to maintain itemId (or for arrays, array index if you remove from center)

[meager spade]

{
    return WorldInventory.ReplicatedEntries.ContainsByPredicate([Guid](const FKaosItemEntry& Other) { return Other.ItemGuid == Guid; });
}```

you don't need maps

[ashen stone]

If you remove the first item of array it will change the index of all

[meager spade]

right but item should not care where it is

item location is only determined locally

even if the item does know where it is, having a int32 on the item for its location works.

I personally would not use map cause map's can't replicate.

in my game, item's have no idea where they are in the inventory, that is maintained by the say the QuickBar component (game specific).

[ashen stone]

Do you have item drag & drop from different containers?

how do u know what u are dragging on

[meager spade]

yes

cause the widget holds the info about the item

struct FKaosSlotEntry
{
    GENERATED_BODY()

public:
    UPROPERTY(BlueprintReadOnly)
    FGuid Item;
    
    UPROPERTY()
    bool bEnabled = true;
};```

[ashen stone]

and i need to maintain itemId on the EquipmentsContainer

0 = weapon
1 = shield
2 = pants
etc

cant have holes

[meager spade]

what i am saying is

split the sutff

[ashen stone]

cant move pants to 1 if i remove shield

[meager spade]

stufF*

ffs, keyboard lol

[ashen stone]

I see

[peak sentinel]

Hey Kaos, is there any possibility you know about this? If yes, can you share your thoughts after your conversation ends?
<#multiplayer message>

[meager spade]

oh i dont fire bullets on the authority, so never encountered that

[peak sentinel]

Did you go full client authoritative? 🤔

[meager spade]

yes

with server side checks on the shot data

one thing is, you need to keep the timers in sync with framerates

i assume you set a new timer for each shot?

[peak sentinel]

Yes

But ShooterGame had some logic to keep it synced, they are just not getting executed (breakpoint never hits those lines)

[meager spade]

i use interval adjustments

i assume your doing the same?

[peak sentinel]

yes

  const float SlackTimeThisFrame = FMath::Max(0.0f, (World->TimeSeconds - LastFireTime) - WeaponData.TimeBetweenShots);
    if (bAllowAutomaticWeaponCatchup)
    {
        TimerIntervalAdjustment -= SlackTimeThisFrame;
    }

Yeah pretty much same, but this does not prevent it either. So probably I should seek solution in another logic. Thanks for the inputs ❤️

[meager spade]

like i said, mine is all client side

not tested with server running the same code

what is liekly happening

is client has finished firing, but the RPC to server has not arrived yet

[peak sentinel]

Yeah, exactly

[meager spade]

so server fires an extra shot, cause its not been told to stop

as the rpc takes a while to arrive

[peak sentinel]

I thought ShooterGame was preventing this somehow (as I wrote above) but I realized even ShooterGame's implementation is not able to prevent this

So maybe this can be even unavoidable

[meager spade]

ShooterGame is client side only?

it doesnt run fire timing on the server

[peak sentinel]

Ah, you're right. I confused with my altered implementation. I also fire from server. So probably I shouldn't then

I wrote that logic in my very early days

[meager spade]

yeah, if you do server doing the stuff

you kinda don't want to run it on client

though for responsiveness, just let the client handle timings

server can still do the traces (if you want)

just the client signals to do that

[peak sentinel]

Server fires literal actor projectiles so my past self though I need to avoid RPCs because it can cause serious delays and desyncs. Now I'm realizing I need to rethink about the whole system

[meager spade]

i have anti-cheat measures, like i check the firerate between shots to make sure its consistent on the server, angle to the shot, simple line trace to ensure the shot could hit not what was hit, etc

and a few more secret ones 😛

[peak sentinel]

Secret Kaos tech ™️

Alright, thanks a lot Kaos

[stray badger]

Is there a way to get all current actors in the owing frustrum?

[fathom aspen]

You mean actors in the camera view?

[stray badger]

Yes. I know of one way by converting the actor’s location to screen space but it’s expensive. I was wondering if there was a lower level abstraction already built in.

[meager spade]

not really no

[stray badger]

What about this?

https://gist.github.com/whoo24/c8da40cda78f8cada5e144e3164f3262

[meager spade]

that's still doing calcs under the hood

[stray badger]

Idk why I’m in multiplayer btw

But alright

[fathom aspen]

There this answer by Rama but it iterates over all actors. Don't think that's ideal

answers.unrealengine.com/questions/21801/check-if-an-object-is-visible-by-a-camera.html#post-21947-score

Hyperlink intensifies

https://forums.unrealengine.com/t/how-can-i-check-if-an-object-is-visible-by-a-camera/279066#post-21947-score

[stray badger]

Yeah I saw this post

Thank you

[meager spade]

becareful with that though

i had bad results (might be ok in FPS games, but breaks in top down games, etc)

also it works from bounds, so if an actors bounds is huge, it could be rendered, but not actually in the viewport

[fathom aspen]

Cool edge case right there

[somber glade]

Widgets in multiplayer are only locally relevant right? I'm working on setting up video chat on a quest and running into a small issue. The user is joining the channel (audio works both directions so we know it's connected) but the video image isn't being delivered to the widget. In agora this is done by binding an image to a delegate and then setting the image brush with the delivered texture each time it's updated. This works in single player, so I know the setup itself functions. There must be something off in the way I have the function filtered.

We have an actor in the level that functions as a 'video booth'. When the user steps into that booth, the user is connected to the video chat channel and a widget is display that has the remote (desktop user) video displayed. Logic works like this:

When the player character (default motioncontrollerpawn from the epic template) overlaps the video booth we check for the following:

1. it's a motioncontrollerpawn
2. and the pawn is locally controlled

This should (unless I'm mistaken) mean that any code that executes after this is being run on the client who stepped into the video booth.

At this point we tell the pawn to request an open video channel name from the server, set the widget visible, and then we tell the widget to activate. Activate means going to the local users game instance, getting the reference to the local agora object, and binding that texture. We know agora is working because the audio works, and I know this works in theory because this works in a non-multiplayer environment.

All I'm seeing though is a white box where the video image should be when connected to our dedicated server. The widget, nor the video booth actor are replicated. it's not necessary here. So I'm not sure why I'm getting a white box.

[crude quail]

I'm using GAS abilities to play an animation montage, it seems to only be replicated from Client->Server. The default mannequin movement animations seem to replicate fine. Here's a vid example

Any ideas what I might of missed?

for a bit more context, everything else about the ability is replicated fine

[nova wasp]

are you using the task playmontageandwait?

that's the main way to replicate montages with GAS abilities

you can extend it if you want

[meager spade]

#gameplay-ability-system @crude quail

[green garden]

hi
so i made multiplayer, but when i shoot only i can see the projectile and the other cant see it

[twin juniper]

@green garden gotta replicate it to clients I guess

I'm trying to setup steam multiplayer connection, but my steam overlay doesn't switch on when running the game? How do I fix this. I already changed the defaultengine

[twin juniper]

omg.... turns out I disabled steam overlay to reduce lag in Elden ring

[half umbra]

I renew the question

[nova wasp]

You can do this per-game is steam fyi

[thorny saddle]

how can figure out the server func done it's job ?
i write Server func on cpp and on bp call it. in bp flow don't wait for server func to finish his job and go to next step.
i want to wait for server to finish his job
how can i do it?

[bitter oriole]

You have to have the server fire a reliable Client RPC to confirm to the client

And then (which may be one second later) resume your logic

[thorny saddle]

it is reliable

i sync my player info like lvl on server

in replicate var

then

i wanna show it

but in client

don't wait for server done its job

and show older info

[thorny saddle]

my eng not good if u not understand me sry

[bitter oriole]

i want to wait for server to finish his job
You need the server to send a replicated event to the client to tell it that the server is done.

Simple stuff

[thorny saddle]

i know but we havn't any other way ?

i see steam do a nice job

[bitter oriole]

There is no other way, no

[thorny saddle]

for example when u want get steam id from bp,
in steam plugin have 2 exec
one of them have delay on complete

how they do that?

[bitter oriole]

Look at the source code for it

[thorny saddle]

do u know what is this ?
https://docs.unrealengine.com/4.27/en-US/BlueprintAPI/Ability/Tasks/WaitNetSync/

[bitter oriole]

I've given you a simple solution, this might be the basis for another

Same thing essentially anyway

[cosmic badge]

So.. I discovered over the weekend that netpriority does more then just effect bandwidth of actors, it also seems to change the initialization order of actors that are sent in one go.. It seems very consistent even over the internet, and simulations to drop packets but I cant find anywhere this is documented, only things I've found about netpriority just talk about 'bandwidth' and nothing about the order. Anyone know of any reference about this? otherwise I'm going to have to dig over the source code to just be 100% sure this is safe.

[chrome bay]

Any code that depends on actors being initialized in a certain order will inherently be prone to error. All I would say is don't rely on NetPriority to enforce that.

I imagine that Epic would consider this something of an implementation detail and nothing you should rely on, same thing with property replication order.

E.g, properties will replicate in the order you define them in GetLifetimeReplicatedProps - but you shouldn't actually write code dependant on that.

[peak sentinel]

Is there any difference between replicating a tsubclassof and default object?

[brave wagon]

Hi, when I "play in viewport" with 2 players, everything works fine but when I play with 3 players, my UE 4.26 crashes and shows this error :

Fatal error: [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/CoreUObject/Private/Templates/Casts.cpp] [Line: 10] Cast of IpConnection /Engine/Transient.IpConnection_6 to LocalPlayer failed

Do you know why this is doing that ? thanks

[hallow acorn]

hey guys, hope everyone's day is going great 💙 I wanted to ask if there is a way to prevent the Controller's Pawn from being destroyed on Logout? Thanks!

[kindred widget]

If I'm not mistaken, you can override PlayerController's PawnLeavingGame.

[hallow acorn]

😮 awesome! thanks dude 💙

[fluid summit]

Hi! does anyone know if there's a way to know when an actor has finished spawning?
I have one method where i spawn a few actors and i don't want it to continue until those are fully spawned

[kindred widget]

What does fully spawning entail?

[dark edge]

When a mommy actor and daddy actor love each other VERY much....

[fluid summit]

Hair on the bottom, according to law

I'm getting some times the following error "actor xxx is not fully spawned" so i guess that there's some notion of fully spawned for UE4

[chrome bay]

It probably means you used deferred spawning and didn't call "FinishSpawning"

[sinful tree]

Wait I thought that's how you get Child Classes

[blazing spruce]

Hi all, sooo multiplayer's a cunt lol ive been learning more about replication and the server-client relationship and all that good stuff and from what I can gather I've pretty much wrote everything in the 'wrong' way, although I'm still getting the desired behaviour I think I'm over complicating things for no reason, in the below example ive got code for a door, old way on the left, new way on the right, (ignoring the has authority check for now but I do wanna touch on that) am I now writing this in the best way or can i even improve it further? Would really appreciate the feedback so i can start getting this right lol

[dark edge]

@blazing sprucev3 will be using OnRep

If someone's out of replication range or late joins, they might see the door closed when it should be open as they missed the event

use state whenever possible instead of events

your v2 is close, you don't need the open and close events to be replicated

also you can use 1 timeline and just play it forward or backwards

CLIENTSIDE
Interact -> Run on Server Event Interact

SERVERSIDE
RoS Interact -> Set w/ notify DoorBoolean

EVERYWHERE
DoorBoolean Onrep -> call UpdateDoor
UpdateDoor -> branch on DoorBoolean -> Play or Reverse the timeline -> Set Door Angle.

[blazing spruce]

Thanks for this its actually really helpful, so firstly the interact i have on there is through an interface, are you saying I should remove that and set up an RPC for interaction instead or is that where the HasAuthority check comes in... or should i be doing this where the line trace is called for the actual input for interacting?

Thats how ive got it set up atm

[dark edge]

The fact that you're trying to interact needs to make it to the server somehow. In our project it goes
Input -> RPC -> Interact Interface

all in the pawn. So the client -> server communication happens between input and the interaction interface call

[thorny saddle]

can call game state server func from widget?

[dark edge]

Have you tried?

[thorny saddle]

yes but it didn't work

am i do it right?

[fathom aspen]

Simple function called GetGameState

In BP

[dark edge]

How would I know, you haven't shown your code.

[spark owl]

Are map variable used in blueprints replicated? If I had 1 on the game state class would clients be able to find values? I ask because there is no option for setting a map variable to replicate

[fathom aspen]

Maps can't replicate out of the box

There is a workaround though and it's to use structs

[spark owl]

hmm ok ty for the info

[latent sky]

Hello, anyone know how to get a response from two clients separately via UMG ?

[fathom aspen]

What do you mean by "seperately"?

UMG is local to each client. It can respond to the client and stuff

[latent sky]

@fathom aspen It's like this, I play a cutscene and it stops mid way and asks for each clients input. After getting the inputs of each client I resumes the cutscene. But the cutscene should resume at the same time for each client. Until that the cutscene is being paused

[dark edge]

Widget talks to PlayerController or Pawn or PlayerState which talks to server

[hard hinge]

I was reading through a lot of the source code for the online subsystem steam module and noticed there seems to be no way of using SteamAuth with dedicated servers. What happens is if you have steam auth enabled, you have to also use SteamNetworking() (p2p). The problem with this is that I am unable to connect to my dedicated server when using p2p connectivity. It just connects, and keeps trying and then fails. If I disable SteamAuth then I'm able to connect to the server. However, this obviously has it's own problems. It looks like Epic only implemented steam auth with listen servers lol...

[fathom aspen]

Ok what I would do is notify the PlayerController of the input on widget. Then make the PlayerController send a server rpc to the game state increasing an integer Count property and checking if the count equals the size of PlayerArray

[fathom aspen]

Seems like an #online-subsystems question

[hard hinge]

Epic's implementation of Steam is wrong.

[fathom aspen]

That could be a thing too

[thorny saddle]

hey folks

i wanna call server func

in game state

from widget

UFUNCTION(BlueprintCallable)
void TestClient();

void UPCSClanWidget::TestClient()
{
    Cast<APCSGameState>(GetWorld()->GetGameState())->TestServer();
}

this is in my widget header and cpp

UFUNCTION(Server, Reliable)
void TestServer();

void APCSGameState::TestServer_Implementation()
{
    UE_LOG(LogTemp, Warning, TEXT("test server"));
}

and this is in my gamestate

this don't print anything on server

what is wrong?

[lyric skiff]

My projectile spell doesn't perform any of its logic when fired from the client side. Its supposed to explode on impact which works when used from server, but from the client's pawn it just hits someone and stops moving. The server doesn't even see the projectile. The event to fire it is a multicast function from the pawn. The pawn is "owned" by the clients player controller

its logic includes playing an explosion particle effect and calling functions on nearby pawns to deal damage

this is all done inside the projectile blueprint

the event for that is "run on server" which is triggered by onComponentHit

[marble gazelle]

You can't send Server RPCs to an actor you don't "own", this only works for example on actors like the player controller or player character

[lyric skiff]

so should i set the owner of the projectile?

[marble gazelle]

Wasn't an answer to your question. I have no idea what you are doing wrong as I don't know your code^^

[lyric skiff]

lol

my bad

[marble gazelle]

But I think I get your issue. You can send multicast events only from the authoritive actor(I think, but possible you only can send multicast from the server), which usually is on the Server, so what you need to to is: Request to shoot on the server (you may do local prediction) and then the server needs to send the multicast.

[lyric skiff]

yeah i have the "shoot" event as a multicast

[marble gazelle]

So the client sends a request to the server and the server then sends the multicast?

[lyric skiff]

first picture is the character pawn, second is in the controller

so i guess yes, its an input action that calls the "run on server" event in the controller which then calls a multicast event on the pawn

[marble gazelle]

What does "IsProcessing" do, who sets this and where

and if you "guess" why not log it?

[lyric skiff]

isPossessing is set by the controller, it probably doesn't need to be replicated

log it how?

well apparently if i don't have it replicated the client can no longer even cast spells

[marble gazelle]

Why do you need isPossessing? what does it do?

Log: PrintString

[lyric skiff]

my game is similar to chess (eg you have a certain amount of units) and you can possess your units and move them. IsPossessing makes sure you don't use the spell controls and stuff while on the rts style camera

[marble gazelle]

so you have multiple actors?

[lyric skiff]

yeah

[marble gazelle]

and you are sure these are setup correctly?

I have the feeling they are not ^^'

[lyric skiff]

i am not sure

[marble gazelle]

could you try using the PlayerState to send the Multicast with the actor you want to call it on as reference?

[lyric skiff]

i haven't been using playerstate.... lemme see

[marble gazelle]

I basically just want to figure out if the issue is on your actor or a different one^^'

[lyric skiff]

i'll have to set up playerstate

i've basically just been using my controller to do anything I thought a playerstate would do

so make an event on the playerstate that the controller calls which then calls the multicast on the pawn right?

[marble gazelle]

no^^

So the PlayerController is only on the server and the client it belongs to. the player state is on each client. So I'd first of all just test if you receive a multicast event on the player state on each client.

Afterwards you can either check whats wrong with your actors or use the player state to distribute the multicast and then on client side just start the logic on the actor

[lyric skiff]

so make a multicast event on the player state and call it from the controller just to see if it works/

[marble gazelle]

yep

[lyric skiff]

what is supposed to happen? i have just a print string there and on the listenserver it says "server: example string" "client1: example string" and on the client it just does "client1: example string"

i just have it hooked up to a keyboard input on the controller

[marble gazelle]

guess that's fine, seems unreal replicated the print also to the server

[lyric skiff]

yeah i'm not sure

[thick scroll]

I am currently implementing a stance system(standing, crouching, prone), using the CharacterMovementComponent. Currently I am implementing my prone the same way crouch is implemented, meaning I extend SavedMove to accept a flag called bWantsToProne. However, considering the stances really are a state machine of sorts, having both bWantsToProne as well as bWantsToCrouch, feels like a bit of an anti pattern since conceivably we could be in a state that would not be handled by the movement component. I would much rather be able to pass in an Enum, lets say DesiredStance into my SavedMove, read that on the server and then update the new stance on the proxies.

Is there any detriment to passing something into the SavedMove which is not handled by the compressed flags (Like my Enum in this case)? I would much rather use the compressed flags for other things, like Sprinting, Sneaking etc. than wasting 3 of the bits on the stance.

Also, which is the best method to override in the CharacterMovementComponent to intercept the new move on the server?

Grateful for any answers!

[sweet pilot]

Hi guys! Is it possible to convert a FVector to FVector_NetQuantizeNormal, I want to know the compressed value before send it through RPCs!

[blazing spruce]

Thanks, thats how ive got it set up but do you use the HasAuthority node anywhere? when ive been looking at the network features content example project, as well as the project for one of the inside unreal livestreams they did a while back they are using them almost everywhere but im still not entirely sure what exactly they're doing since most of the code works without them being there and it works for both client and server regardless

[stiff fractal]

Hey guys. I think this is the right channel. I've got some local non-replicated widgets that the players drag onto the screen which then activates some replicated visuals to all players. It used to work fine but then at some point it broke for clients. Every time I try to interact with the drag widgets in a client I get this warning and nothing happens. It's not even an error. It still works fine on the server. My very limited research findings says it's something about network serialization, which makes no sense because the widgets are not replicated. It's driving me crazy. Has anyone had a similar issue?

[chrome bay]

Presumably you're trying to reference them within a network function or replicated property

[stiff fractal]

Is there any way to tell where? This warning is next to useless. I've followed the trail everywhere and it all looks correct.

[sinful tree]

Somewhere in your game instance, or at least, it's referencing variables from your game instance.

[inland pond]

Hi, I would like to show the name and a healthbar above other players in my game. I came up with this solution you can see in the screenshots. I curious if I can simplify this to a somewhat cleaner approach. The main problem is that the player state is not immediately available because of replication. For that I have created the OnRep_PlayerState dispatcher. But this only works for the client (remote authorities) because the playerstate is only available in the server after the character is possessed on the server.
Inside the BPW_PlayerInfo I am listening to the OnRep_PlayerState event but it can also happen that the event is called before the the listener is setuped so this is why I also needed the extra check for isValid on playerState.
This feels like lots of checks in different places just for that "simple" thing. The healthbar with replicated health was much simpler to setup. Is there a more intelligent way of handling this kind of waiting for the playerState?

[bitter oriole]

Usually you'd attach the nameplate to the Pawn, and in Tick you'd fetch the name in Playerstate and set it to the plate

[dark edge]

The capsule pretty much has to be vertically aligned. Anything beyond that will involve a lot of modifying the CMC

[inland pond]

Ah yes my playerinfo widget is attached to the player character. So it would be totally fine to poll for the playerstate inside the tick function of the umg widget (or using property binding)? I was always somehow afraid to use the tick function 🙂

[bitter oriole]

If this is purely Blueprint, being afraid of Tick is somewhat legitimate

There's indeed a cost attached

[kindred widget]

If you have C++ access, you can easily override Playerstate's SetName and add a delegate. Otherwise your only choice is tick.

[bitter oriole]

There's indeed no real alternative here

As I usually say - if you need Tick you should not be afraid of it

[kindred widget]

Also random fun note. Even that function breaks on a Listenserver. Requires a next frame delay to set correctly after the delegate broadcast in some cases, but only on the listenserver itself.

[inland pond]

Alright thank you both for your answers! Yes it is Blueprint but I have exposed OnRep_PlayerState from c++ so I might also try your advice @kindred widget. Does this also solves the replication issue so does SetName gets called even if I don't call it by my self and instead constructed from replication?

[inland pond]

What do you mean by that?

[kindred widget]

When I was making my player name widget, I had a delegate in PlayerState. Ran from SetPlayerName and OnRep_PlayerName. For some reason specifically on Listenserver Machines at the time despite the broadcast being at the end of those functions, the widget didn't update name correctly on the listenserver. Not really sure why considering that PlayerNamePrivate should have been set at that point. Ended up with blank names on the server and correct names on clients. Was easily fixed with a 0.0f next frame delay, but weird.

[inland pond]

Oh okay thanks for that hint. Maybe I will also come across this weird behavior now I am warned

[inland pond]

@kindred widget Sorry one more question regarding the delegate in your playerstate. How have you assigned a listener to that delegate dispatcher when the playerstate is not yet ready?

[kindred widget]

GameState delegate. Uh..

AddPlayerState runs when a playerstate replicates and adds itself to the GameState's PlayerArray

[inland pond]

Alright thank you!

[kindred widget]

If you initialize your UI with AHUD's Beginplay, you can always count on GameState being ready at that point since it is what causes that to run.

Good place for root delegates for that sort of thing.

[inland pond]

Okay nice thanks, I will try that

[thorny saddle]

hey guys

i wanna run server with cmd

and join it by cmd

anybody know what should i do ?

[plush wave]

Do player states stick around even when a player is disconnected?

I see there is InactivePlayerStateLifeSpan and I can set that to 0 to have it stick around, but isn't it still a "copy?"

[winged badger]

it sticks around for 5 minutes

it takes a little work to get working, depending on the game

and there is one Duplicate() call involved

[edgy flower]

guys im having this issue where https://gyazo.com/fe01bb7558c162e4dd527d0a85c7badd
my second and extra players dont get spawned at all and the only one that spawns is invisble to other players

i dont even know what im looking for to hopefully find the fix for this

im not even sure what term i should be googling :<

[fathom aspen]

Here you can find examples: https://docs.unrealengine.com/4.27/en-US/ProductionPipelines/CommandLineArguments/

[plush wave]

So pointers to old player states won't work when a player disconnects?

[winged badger]

not sure without checking the engine code, but pretty sure Duplicate happens if the player reconnects

[plush wave]

Right so pointers would not work

Thanks

[lyric skiff]

I need some help with projectiles that do stuff upon impact. Essentially I have it so that the player controller owns a bunch of pawns, these pawns can shoot projectiles which are then owned by that pawn (and therefore owned ultimately by the controller).
The projectile is fired via a multicast from the pawn, but since the owner is the client player controller, i guess this does not work? what is the proper way to deal with this, just have a multicast AFTER a run on server with an authority check to make sure the server does not run twice?

and then how should the logic within the projectile be run, same? on server with a multicast after and authority check to make sure server does not run twice?

any help would be appreciated 😅

[dark edge]

Show your gamemode

[edgy flower]

oki

https://gyazo.com/75588873b309ffc4022847348ac1be93

[dark edge]

Your handle starting new player is doing nothing

not sure if that'll break it, but seems like it

@lyric skiffDo you need prediction?

what's the game style

cuz if it's at all close to RTS, this sounds like you should just be doing everything on the server and replicating it

[lyric skiff]

Its kind of a weird game mode i'm designing. Its somewhat RTS but I have possession of your units in thirdperson

[dark edge]

Do your units fire predicted or serverside?

the non-possessed ones

[oblique inlet]

I'm trying to make the first person template multiplayer. Usually I just call the fire function on the server but since the weapon is a separate actor in UE5 that no longer works. What can I do now?

[lyric skiff]

i'll need to research what predicted means but right now I have the actual spawning of the projectile as a multicast function from the pawn that is owned by the client so i'm pretty sure that is wrong

[fathom aspen]

You probably need a server rpc with the projectile actor replicated

[dark edge]

Yeah that is the easiest, and can work for some games

hell even New World doesn't predict projectiles

[lyric skiff]

I don't think prediction matters as it is a turn based game

[dark edge]

oh lmao

[lyric skiff]

maybe i'm wrong about this

[dark edge]

if it's turn based then yes server does everything

what the client passes to the server is "Hey I wanna shoot my gun now"

[edgy flower]

ok ill make some adjustments

thx

[dark edge]

Try deleting that event and seeing what happens

[edgy flower]

thats the goal xD

[lyric skiff]

i get confused cause my brain is pretty smooth so lemme try to understand though. It should all be done on the server but then what is the multicast vs run on server? do i just have to chain those together to make sure everyone sees it?

[fathom aspen]

If you wanna know more about prediction and see live examples, you can check ShooterGame code

[fathom aspen]

If you still need it, you can try calling parent function

[dark edge]

Client -> Run on server -> Do thing

no multicast

multicast means "everyone do this"

only server can call it

[fathom aspen]

Multicast is called from server and executes on all clients. Where Server rpc called from client and executes on server

[dark edge]

What does a "turn" look like in your design, sorta like Divinity Original Sin?

[lyric skiff]

Yeah sort of, set amount of AP for moving and abilities

[dark edge]

yeah, that's super simple to make multiplayer. Much simpler then live action real time stuff

So what you want to be passing to the server is your moves. Move here, use this ability here, etc

[fathom aspen]

Multicast I would probably use it for non gameplay events. For example spawning an effect or something

[dark edge]

Yeah maybe but I like to keep stuff state as much as possible.

[lyric skiff]

when I change the event that actually spawns the projectile/ability to "run on server" it doesn't let the client call it at all

[dark edge]

Client probably doesn't own what's trying to do the calling

[lyric skiff]

it does own the pawn i think... hold on

imma check

[dark edge]

You can set up this whole system in your playercontroller, no need for pawn stuff really. Don't use possession for turn based stuff

The playercontroller just has to have run on server events like MoveCharacter or MoveCurrentCharacter or CurrentCharacterPerformAbility etc

you don't need to do any RPCs inside of characters.

[lyric skiff]

uh huh that kinda makes sense

[dark edge]

I wish I had a good turn based idea, it's actually really feasible as a small indie vs trying to make a twitch shooter.

Basically think about how you'd play the game by mail. That's what you should be sending to server.

[lyric skiff]

you can work with me 🙂

[dark edge]

like corrospondance chess

[lyric skiff]

lol

[quasi tide]

Can make a TBS game online with friggin standard HTTP requests, lol

[quasi tide]

Shit, I have an idea, but I also have like 3 games in front of it 😭

[dark edge]

@lyric skiffI would start with a PerformAction struct. The struct would contain a character ref or ID, a ref or ID of the move to perform, and the target tile or cell or location.

Just pass that in a TryPerformMove run on server event

("Bigass McGee", ChargeAttack, (12,3))

That'd be your big boi charging at tile 12,3

[lyric skiff]

I ideally wanted movement in 3D as the character.... i'm really not sure yet if that adds anything to the experience but that was my ideal

full 3D movement like as in the thirdpersoncharacter example project

[dark edge]

ok
("Bigass McGee", ChargeAttack, (1231.231, 3021.55, -200.37))

[lyric skiff]

i see

[quasi tide]

And please, make sure their name is in fact, "Bigass McGee". Or at the very least, be a hidden character.

[lyric skiff]

lemme think about what you've said for a bit

[lyric skiff]

absolutely

[dark edge]

That's what all my muscley guys are in games lol. Shirtless and with a big bonk stick.

[lyric skiff]

i mean i think i can still refactor my stuff to be what you're saying

[dark edge]

If you're talking about live action movement etc, that would get trickier and probably imply possession unless you like lag.

[lyric skiff]

i just have to move the spellcasting logic from the pawn to the controller

[dark edge]

no spellcasting is on pawn still

controller is just passing over orders

[lyric skiff]

yeah that is currently how i have it

let me screenshot some stuff real quick

[dark edge]

You're talking like XCOM right?

[lyric skiff]

top image is from the pawn while bottom is from controller

[pseudo merlin]

is there anything that would make an actor not set to replicate replicate? like being attached to a repped actor or something?

trying to track down an actor appearing on client that shouldnt

[dark edge]

How is it being spawned?

[pseudo merlin]

nothing fancy MySquad = GetWorld()->SpawnActor<ASquad>(UGLGameInstance::GetGLGI(this)->SquadClass);

behind a check

    if (GetLocalRole() == ENetRole::ROLE_Authority)
    { ```

[dark edge]

@lyric skiffYou should be able to do the Server -> client stuff just by replication

Repnotify is your friend

[lyric skiff]

are you saying something specific in the example should be set to repnotify?

[dark edge]

Casting a spell should look like replicating some data and spawning some replicated actors

[lyric skiff]

health on all pawns is replicated and the projectile actor is replicated\

i'll just be more specific here

the issue right now is that clients cannot use that spellcast event when its run on server

and i'm not sure why

or rather not sure how to fix it

[dark edge]

Unless your abilities get too fancy, you can probably just have a multicast PlayAnimation node and do the rest with regular replication

but I like just haveing a replicated variable AnimationToPlay and using RepNotify on it to drive it

[lyric skiff]

i need further info on how exactly repnotify would drive it

[dark edge]

So for example, casting a fireball would look like
AnimationToPlay = SingleCastRighthand
Spawn Actor Fireball

You'd probably want to roll all this up into a PerformAction struct tho I'd guess

Depends on how you define your abilities

[lyric skiff]

i have an ability struct

but lets forget animations and stuff for right now

i just want the logic to work correctly

I don't understand why a "run on server" event on a pawn, called from the owning player controller would not work

it spawns a replicated actor so all seems to me like it should be fine, and it does actually work when used on the listen server

however the clients are unable to run this event

[dark edge]

Is the pawn actually replicated?

[lyric skiff]

yes

[dark edge]

Show the entire execution path

from input

[lyric skiff]

i think i already did lol with those screenshots

inputaction --> spellcast (player controller run on server) --> spellcast (pawn run on server)

[dark edge]

First of all you don't need all that get controlled pawn stuff

you're in the controlled pawn

but anyway, you don't need to do it like this

do all run on server events in playercontroller or some floaty vision pawn

[lyric skiff]

ok i'll try moving the actual spellcast logic to the controller

[dark edge]

Don't move the spell logic to the controller

just move the Client -> Server RPC there

[pseudo merlin]

replying to myself for future searchers. APawn has a some methods that override replication (Search SetReplication in APawn to see what needs overriding)

[dark edge]

in a generic way. That's how you're passing orders from your computer to the server

Input/UMG -> Run On Server Event -> Pass order to character

[lyric skiff]

okay i'll give it a try

i mean is what you're defining not exactly what i have here?

input action -> spellcast (run on server) -> pawn

[dark edge]

Is that in playercontroller?

[lyric skiff]

yes

[dark edge]

That's close, just include more info in the RPC and change it to PerformAction or whatever and instead of calling it on controlled pawn, pass over the pawn you wish to command or a reference to CurrentPawnWhosTurnItIs or whatever

I would pass over in the RPC

1. Who you want to do the thing
2. What thing you want them to do
3. Other info (Target location, options, etc)

[inland pond]

@kindred widget I am lost. I have created a dynamic multicast delegate and broadcast it on AddPlayerState this adds lots of more questions. The code for the PlayerInfoWidget creation is inside my player character. I wanted to call it inside the AHUD (BP_InGameHUD) but via the log I can see that the delegation registration is too slow. BeginPlay on AHUD is to slow. In the LOG.png the Begin Play on AHUD misses the first added player state. This was not the hint you gave me right?
And I also can not get the pawn from the player state. So I can not call the function for creating the PlayerInfoWidget there. The OnPlayerNameChanged delegate how I implemented it is also not working. I don't know what I am doing wrong.
Maybe you or somebody else can see where the problem is :S
Otherwise I will use the bind function method for now.

[dark edge]

BigDude, HulkSmash, Over Here
MasterBlaster, Fireball, Over There
WimpyMan, Move, Way Over There

[lyric skiff]

I'm so confused what the difference between "calling it on the controlled pawn" and "passing it to the pawn you wish to command" is

both of those seem like the same thing to me pretty much

what does "passing" mean in terms of the unreal editor?

I don't think it really affects the issue at hand but I also do have logic set up in the pawn for showing the projectiles path and picking the spell to be cast so all that is already chosen within the pawn

[sinful tree]

A controlled pawn would be one that is possessed, so a pawn that you would end up directly controlling so any inputs that you define within the pawn can be used to control it. However, you can still get reference to another pawn that isn't possessed and send commands to it - like if you had a "Selected Pawn" variable in your controller that gets set when you click on one of your pieces, and then you can call functions on the "Selected Pawn" by using the "Selected Pawn" variable as the target to receive the commands.

[hard hinge]

Can RPC's be called in PostLogin()? Seems like I can't?

[sinful tree]

GameMode isn't replicated.

[hard hinge]

I guess I can't call RPC's on the PlayerController as well then?

[sinful tree]

You can.

[hard hinge]

I'm calling my RPC from the game mode, but on the PC

[sinful tree]

But it can't communicate back to the Game Mode.

[hard hinge]

void AShooterGameMode::PostLogin(APlayerController* NewPlayer)
{
    Super::PostLogin(NewPlayer);

    // Do Steam Auth
    AShooterPlayerController* PC = Cast<AShooterPlayerController>(NewPlayer);
    PC->ClientRequestSteamAuth();
}

this client rpc isnt being called

I checked all of the log files

[sinful tree]

I've been able to call RPCs on the controller as soon as HandleStartingNewPlayer, in blueprint at least. Mebbe there's something up with how you defined the RPC on ClientRequestSteamAuth()?

[dark edge]

Having the order depend on state is just more fragile

What if you had a bug where ControlledPawn was lagging or whatever. It's better to be more specific.

[hard hinge]

Shouldn't be. At the very least, I should be seeing this log:

if (SteamUser())
{
    // HIDDEN
}
else
{
  UE_LOG(LogOnline, Warning, TEXT("SteamUser() is not initialized!"));
}```

But the UE_LOG is not in the log file

I have a few other logs as well which are just scattered around that aren't in any if/else blocks

Did you ever figure out the cause of this issue?

[lyric skiff]

so i've narrowed it down to this branch that doesn't return true even though i've checked in the editor and that value is set to true for that pawn during gameplay. More issues though because even after that it doesn't actually spawn the projectile actor anyway when I bypass the branch completely

[olive marsh]

Hi!
The question is about replicating classes.
I have my UTeam class

class UTeam : public UObject```
which contains
```UPROPERTY(Replicated)
int players_count;```
In my GameState I have
```UPROPERTY(Replicated)
UTeam* blue_team;```
GameState and UTeam have `GetLifetimeReplicatedProps()` overridden

Then I have a widget, that tries to access `GameState->blue_team->players_count`
```MyGameState* GameState = GetWorld()->GetGameState<MyGameState>();
int count = GameState->blue_team->players_count;```
It works perfectly fine for server, but when the client is using the widget, a crash occurs with this message:
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000038

What am I doing wrong?

[winged badger]

your UObject is not replicated

you are just replicating a reference to it, which client can't resolve

takes extra bit of work to replicate a UObject that is not an ActorComponent

also, you're not nullchecking your pointers

[olive marsh]

makes sense, what should I do to replicate a UObject?

[winged badger]

override ReplicateSubobjects() in the Actor that owns it, and IsSupportedForNetworking on the UObject itself

[lost inlet]

or just use an actor component where that's mostly handled

[winged badger]

better learning experience if he doesn't 😄

[olive marsh]

thank you a lot!

[lyric skiff]

If you set a replicated variable in a "run on owning client" event does it still update the server?

[dark edge]

No

[lyric skiff]

i see

[dark edge]

It'll update the value locally on the client and then it'll be set back to the replicated value next time the value is replicated out.

Why would you do that anyway?

[lyric skiff]

it wasn't intentional

just issue of not knowing what i'm doing well enough

[dark edge]

For your design you shouldn't need much for replicated events. I'd start by just haveing your Client -> Server RPCs and that's it. Rely on replicated state for the rest

[spark owl]

i have a custom struct variable in my gamestate class. Inside this struct are 3 map variables. I'm trying to get it so on a widget it gets the struct variable that's replicated from the game state class, and then do something with the variables, the problem is whenever I change the struct on the game state, it doesn't seem to replicate the map variables. It just has the default map values. Any clues on how to get the maps replicated?

[lyric skiff]

so try to use gamestate for everything?

controller just for inputs

[dark edge]

No. Replicated actors and variables.

Spell out a situation and I'll suggest how to implement it

[lyric skiff]

currently I have a "ghost" projectile that does a linetrace and shows where the projectile will hit

[dark edge]

Local only, nothing to do with the network.

[lyric skiff]

i had it running on client only casue no need for the other person to be able to see that

yeah i just happened to be setting a variable "is aiming" in that though

so i'll just have to change where that variable is set

[dark edge]

is aiming a state? Like does aiming happen during a turn or is it like a stance?

[lyric skiff]

"aiming" happens when you press an ability button while possessing a pawn

[dark edge]

I thought you were doing turn based

[lyric skiff]

its during your turn

[dark edge]

ah ok so it's aim -> fire

[lyric skiff]

yeah

[dark edge]

that'd be local unless other people have to see it

don't possess tho, that's a trap

[lyric skiff]

they don't

yeah possessing seems annoying but making the whole movement scheme without it seems really complicated

replicated movement without possessing

[dark edge]

No different from AI

[lyric skiff]

you have a good resource for this?

[dark edge]

You'll have AI controllers running on all these dudes anyway probably

[lyric skiff]

i'm unfamiliar with ai controllers

[dark edge]

I'd do this with the players pawn being an invisible floating camera

Do you intend for movement to be manually driven or click and pathfind?

[lyric skiff]

manual

[dark edge]

If it's manual then possessing might be fine, that's a weird hybrid but could work.

[lyric skiff]

yeah its a pretty unique idea and i'm not sure it will even pay off

like be fun

but its my first project so just trying to have fun myself

I have all the possession stuff working already anyway

at least the basics

if you'd like to see it i'd like to show you to see if you have tips haha

but no pressure

[spark owl]

does anyone know about having maps inside of structs being replicated? it seems like in a custom struct I made that's replicated on the gamestate class isn't replicating map variables, it's just returning the default map values

[sinful tree]

Yeah Maps aren't set up to replicate.
Best you can do is make a struct that has the key and value types as variables and make an array of this new structure and replicate that array instead.

[spark owl]

ok thanks for this. I think I can make that work

[dark edge]

@lyric skiffSo how do turns work, just time?

[lyric skiff]

action points for movement, spells, etc

each turn get a set amount plus whatever you had left over last time up to a max

like divinity

[dark edge]

So if it's my turn and i strafe left and right real fast I'll just drain it all and stand there?

[lyric skiff]

yep

i've got that worked out too already although it needs work

like action point movement is working

[dark edge]

You could add in a little bit of slop, like the character is dragging a thing 50cm behind them and that's the thing who's movement burns AP

[lyric skiff]

that would be smart

not my top priority but definitely something to add later

[dark edge]

Yeah if you need to manually drive the dudes around then possession makes sense. I thought you were talking about something like Divinity or XCOM

We're making something like a live-action XCOM roguelike

[lyric skiff]

when you say "we" you mean me here? or you're also doing something similar?

[dark edge]

nah me and my buddy

[lyric skiff]

oh dank

[dark edge]

Sorta like a coop XCOM roguelike with the combat and pacing of the old school Rainbow Six games

slow and methodical

[lyric skiff]

click to move?

or wasd

[dark edge]

nah twin stick / top down wasd

[lyric skiff]

nice nice

i'm trying to do super methodical too. projectiles in my game will be turn based in movement as well

its actually already implemented as well

[dark edge]

So when do they move? Or is it like a SuperHot type thing

[lyric skiff]

move a certain amount on player who fired its turn

[dark edge]

I'd consider maybe making it a time system

[lyric skiff]

based on real time?

[dark edge]

Sorta like how Pillars of Eternity does things

[lyric skiff]

or you mean super hot

like if the enemy is moving my projectile will slowly move

i haven't played pillars

[dark edge]

Yeah basically a real time game but any time nobody is doing an input the time stops

doing input or doing a thing that takes time.

[lyric skiff]

that would be pretty cool

this is how its implemented rn

pretty rudimentary

[dark edge]

Would make for some cool interactions too like trying to intercept a projectile about to kill your homie etc

[lyric skiff]

yeah there are definitely lots of things that would be cool to try

i'll consider that for sure

so it seems like another issue is that the client pawn "spawn actor" for firing the projectile doesn't work

even though its being run on server

[wary sigil]

When using SessionInterface->FindSessions( with the Steam subsystem and the test SteamApp ID of 480 - why doesn't it return the sessions of ever other Dev using the same app ID? What/how is it filtering sessions so it only returns my own?

[lyric skiff]

nvm it was because it was using more variables that were set on owning client only

[edgy flower]

@dark edge so you were right

deleting that fixed my non existing meshes

but the movement isnt replicated however

on the second screen

[foggy idol]

is set movement mode replicated by default ?

and do saved moves essentially take client data and use that to update the cmc on the server ?

[eternal canyon]

no

[eternal canyon]

https://docs.unrealengine.com/4.27/en-US/InteractiveExperiences/Networking/CharacterMovementComponent/

[kind ember]

Alright, how can I delete asset in PIE?
FAssetRegistryModule::AssetDeleted( AssetData.GetAsset() ) ; This doesn't seems to work.
Or
ObjectTools::DeleteAssets(AssetsToDelete); This compile error

[dark edge]

Not sure but you probably don't.

[kind ember]

Ok

Thought this was cpp section lol

[lyric skiff]

adriel i'm already having problems with some sort of lag maybe you could help sort it out

in order to rectify the last issue (variables were not being set replicated because they were in an event that only had to run on client) at the end of it I made a new event to set all those variables which are used when actually casting the spell (selected spell, isAiming). Now I have significant lag from when I press the select spell button (ie Q or E) and when I can click to cast that spell

I think it's lag only cause the client has the issue and not the server

but i'm kinda unsure what to do about it lol

possibly will have to somehow pass that info into the "cast" event as input instead of just retrieving the replicated variables

but the chain of events that leads to the "cast" event starts at player controller so its kinda sketchy

[eternal canyon]

//    Network Prediction Plugin
// --------------------------------------------------------------------------------------------------------------------
After a long road and many attempts, we are dropping support for the async version of Network Prediction. We felt the 
complications it introduced into the physics system were too much to maintain and performance was still too poor in
the worst/degenerate cases that it wasn't going to be a viable system for enough games to warrant the complexities.
The original single threaded version of Network Prediction is preserved and unchanged. We still hope to use it to 
build a new character moverment system with it. Physics support could come back into this version but it would be
strictly opt in and only applicable to games with small number of objects and players.```

rip

[dark edge]

If you mean for the game to control like a 3rd person action game just with your turn ending when you run out of SP/Stamina/whatever, just make it work well without the SP restriction then add the restriction in

You gotta choose whether the players interface with the game is by issuing commands or driving the characters around. If it's driving the characters around then just do it the way all the other 3rd person action games do it

That's a much harder approach though as you'll probably want some sort of prediction, but maybe you can just do clientside stuff with no worries as only one player is moving at a time.

[lyric skiff]

so just have the pawn take input?

[dark edge]

If that's the way you wanna do it. Whether the pawn or the playercontroller handles the input doesn't matter really. Depends on what works best for your design

[lyric skiff]

yeah i'll have to play with it

thanks

would checking replicated variables cause it to slow down though? basically what i'm looking at is pressing Q sets these variables (spell to cast) and click to cast it but they're replicated so idk

[dark edge]

Going fully turn based Divinity style will be 10x easier tho. Lag doesn't matter in a design like that where it definitly does for live action

[kind ember]

Wow, what a disappointment,

[lyric skiff]

yeah i'm just gonna keep going this way cause i might wanna adapt it to a less turn based style game mode at some point

[dark edge]

What does that imply, physics support is dead or just some async stuff is dead?

[dark edge]

I'd start with not worrying about the turn based bit for now and make a super simple setup work smoothly

Then later you just stop them when they run out of SP

[lyric skiff]

the turn based stuff is already implemented

i'm just talking about lag while using the interface is happening right now

[eternal canyon]

from my understanding mostly

but they may add it back later

[dark edge]

uh which one?

[eternal canyon]

just performance wont be very good

physics stuff

im pretty sure

[dark edge]

@eternal canyonWhere'd you see that?

[eternal canyon]

Actually might only be async stuff

I wonder if that means ur gonna have to have the frame cap now for physics stuff like usual

But the last part made me think it’s physics stuff

[dark edge]

Where did you see that? Can't find it anywhere

[eternal canyon]

If u go on the ue5 main GitHub

Go to the network prediction plugin

Should be there

[hollow eagle]

that comment has been there for a month or two now. And yeah, it's specifically talking about async mode.

Unfortunately NPP is still up in the air since the primary author left Epic and we don't know if anyone/who is taking it over.

[dark edge]

I still can't find that comment but anyway

Prediction has always been a rat's nest, too many linked systems. You'd think it'd be ripe for some sort of generalized Value / Boundary Condition / Dependency type treatment, maybe that's what NPP is trying to be.

[kind ember]

Is Dave Ratie the author?

[hollow eagle]

I honestly don't remember

[round kernel]

Multiplayer Movement Jitter

Hey all. I am having an issue with client movement jitter when using P2P. Using a standard set of movement inputs and the character, and components, are replicating; Replicate Movement, Replicates, Component Replicates. and Net Load on Client is ticked.

Is there something I am possibly missing with what I have mentioned? Or could the issue be else where?

[dark edge]

Yeah Dave Ratti i think

[hollow eagle]

ah yeah, his name is on the commits

[dark edge]

Do you mean listen server?

[hollow eagle]

https://github.com/EpicGames/UnrealEngine/blob/ue5-main/Engine/Plugins/Runtime/NetworkPrediction/readme.txt#L5

[round kernel]

Yeah. Pardon me. 🤣

[kind ember]

Oh shit, my bad, spelled his name wrong lol,
Wow, he left, that sucks.

[dark edge]

@round kernelDoes it happen everywhere or just on the host?

[round kernel]

The host doesn't see or feel any jitter.

sorry I shouldn't say that. Most times it doesnt see it. But any "client" that joins will feel jitter on input movement. Something like gravity doesn't look like it's jittering from the servers perspective.

[dark edge]

@round kernelThat setup looks fine, compare your CharacterMovementComponent settings with a default character's and see what differs

[round kernel]

That is indeed a great starting point. -- I have added a few extra components to my current character setup. I'm not sure if that's going to effect much outside of replicating all of them or not.

[nova wasp]

well, at least we might see a new cmc

bummer though...

[eternal canyon]

Pretty sure he was

[nova wasp]

yeah, it was Dave Ratti

https://youtu.be/3HLvNu-j6eg

he made some videos about it over the last 2 years

[eternal canyon]

Yea

[kind ember]

Well where is Dave Ratti working now?

[round kernel]

Are the default projects setup for multiplayer? All the components are not set to replication which makes me think it isn't. Other than that everything is similar on my project settings.

[lyric skiff]

If i do this is the set bool at the end going to run on server?

[fathom aspen]

No

[lyric skiff]

thanks

[digital wigeon]

When testing PIE as clients, is there a way to leave/rejoin or add a new client?

[fathom aspen]

Yes

There's a setting for that in the editor preferences

I guess it's called AddClient

Oh yeah I was right: https://twitter.com/ozmant/status/1400055536784220170

Oz (@ozmant)

A handy feature in #UE4 that I keep forgetting about: You can add PIE clients at any time to test what happens with late-joiners in a multiplayer game. Super useful. #gamedev https://t.co/6zdM9G3S1b

Likes

141

Twitter · Jun 2, 2021, 11:43 AM

[digital wigeon]

Thanks!

[dark edge]

The default third person template movement component should work perfectly

[lyric skiff]

Anyone have any ideas why an input action wouldn't work on the pawn when it works on my controller?

[dark edge]

Is the pawn possessed?

[lyric skiff]

yeah

and other inputs work

including other customer input actions

[fathom aspen]

Yes

[lyric skiff]

only thing is that it is left click so maybe its overridden somewhere

[fathom aspen]

Your input is being uhhh

Forgot the word

There is a bool you need to turn off on your player controller

[lyric skiff]

hmm a bool?

[fathom aspen]

Yes

Press on the input event

[lyric skiff]

like a default bool?

[fathom aspen]

It's like a check box

And look on the details panel

[lyric skiff]

is this for all input or just specific ones cause other input actions are working

but i'll check

[fathom aspen]

Your input is being consumed

https://unrealistic.dev/posts/binding-input-in-c

[fathom aspen]

Not here

[fathom aspen]

For example here, press on the node that has input F

[lyric skiff]

F is working properly

[fathom aspen]

So the input you're talking about

[lyric skiff]

my input action "cast" which is above that

is a custom input action bound to left mouse click

i put F there to test

my bad that was a terrible screenshot lol

[fathom aspen]

Yeah it's an input action

Press on that action event node

And you'll see what I mean in details panel

[lyric skiff]

ahhhh

i see

[fathom aspen]

Cool

[lyric skiff]

uncheck "consume input"

?

[fathom aspen]

Read this so you know the science behind this

[fathom aspen]

Yep

[lyric skiff]

still not working but i'll look at that article

[fathom aspen]

Where did you turn it off?

Pawn or PC?

[lyric skiff]

i see

lol

i did pawn

that was dumb

[fathom aspen]

That's how you learn

[lyric skiff]

lol after unchecking in controller it still doesn't work

[fathom aspen]

Make sure it's checked in Pawn

[lyric skiff]

still not working

i think it might be getting consumed elsewhere in pawn

[fathom aspen]

In PC

Not pawn

PC consumes input and it doesn't get to pawn

So you have to make sure all the action events that sit in both have ConsumeInput off in PC

[lyric skiff]

ah

ok i see

got it

thank you wizard

[fathom aspen]

Also if you're not into C++ yet then you can ignore that parts and focus on the other stuff

[lyric skiff]

lmk if you want another spaghetti code challenge i'm facing right now

[fathom aspen]

Well I hate spaghetti, but yeah send away

[lyric skiff]

this is for when I level up a unit, the end part highlights a box on a widget

like so

for some reason the client skips highlighting lvl 2 when it should

server works fine

and heres the spaghetti

so on lvl 2 for any client unit, it doesn't highlight 2, but then on lvl 3 it highlights lvl 2 and so on

on the server it works perfectly

[fathom aspen]

Hell no

[lyric skiff]

lol

[fathom aspen]

On level 3 it highlights level 2 and 3? Or only 2?

[lyric skiff]

only 2

its one behind each time

only on the client

[fathom aspen]

Yeah seems like an increment issue

[lyric skiff]

everything else works like the skills you can pick are correct

and the number of skills you can pick are correct

but just the highlighting is off by one ONLY on the client though

idk where it could be going wrong since the level that I am passing is correct on their overhead status bar

and correct when i click on them in the editor

i guess i'll see what number its passing

[fathom aspen]

Yeah debugging can help you a lot in these cases

[lyric skiff]

so it actually is a multiplayer issue though but Idk where it is incrementing differently on the server vs client

[crude quail]

Anyone able to shed some light on this, been debugging this for a comically long time and I just can't figure out what's wrong. Super simple, I have a box with a static mesh set to replicate here, and this code here

But for some reason... only the server ever succeeds in replicating changes

I'm super stumped.

[hollow eagle]

you want multicast, not client

client RPCs only execute on the owning client. I'm guessing you don't have an owning client for that box.

[crude quail]

You talkin on the Client change Material call?

[hollow eagle]

yes

[crude quail]

It's set to multicast yeah

i can see how that name could be confusing 🤣

[hollow eagle]

ah I missed the executes on all

generally you name those multicast, not client. Because client has a specific meaning.

[crude quail]

yeah lol, that does make sense

[hollow eagle]

the issue is still similar though

server RPCs can only be executed from the owning client

[fathom aspen]

Now you have trust issues with namings

[hollow eagle]

Oh I already had those

I'm just tired and forgot to distrust things 😦

Anyway, in this case you'd generally want your interact interface to execute on the server.

I'm assuming this is triggered via some sort of input on your player, so you'd have the input call a server rpc on the player pawn or player controller and the server would decide what to interact with

[lyric skiff]

Nvm I got it Wizard, just passed the level into that event

I guess it hadn't updated on the client yet when the client drew that widget

[quasi tide]

I always pass the object that I'm trying to interact with to the server rpc personally. Then call the interact stuff from there.

[hollow eagle]

Certainly an option, but I'd do extra validation on the server in that case.

You don't want a client cheating and passing an object 10 miles away from them.

[quasi tide]

Yeah, you do, but I omitted that part for brevity

[fathom aspen]

Replicating takes time, so yeah that's pretty much it

[crude quail]

Trying to get this straight mentally, so you're saying a network agent can only fire a server RPC if it has authority over the given object

[hollow eagle]

correct

(server excepted - it can do what it wants)

[quasi tide]

Because server is the one true version of the game.

Generally, you'll find that you'll be doing all kinds of server RPCs through your PC or Character.

[hollow eagle]

The general pattern for something like this is you RPC what you want to do via the player pawn or controller (or whatever other client-owned object makes sense) and let the server do the same thing you were going to do with the client.

[crude quail]

Gotcha, I think this straightened everything out. I'll have to rethink how I'm doing interaction then, glad I prototyped it early 🤣. Cheers ❤️

[kindred widget]

This is fine. You just need to also call those functions at binding time. You can't assume that your initialization function will run before or after the onreps. For UI, you'll be doing a lot of bind and calling update functions to keep things correct.

[jagged aurora]

Hello, I am calling a function on my pawn that calls a function on server, however when I try calling the function from an actor component attached to the pawn the replicated function does not reach the server, however when the function call originates from the pawn itself (on remote client) it reaches the server, but not when it originates from the actor component attached to the pawn.

Is there something I am missing here ? (component replicates is set to true)

Nevermind, figured it out. Network replication priority was too low

[inland pond]

alright, ok thanks again^^

[solar stirrup]

Hey! Quick question, do blueprint replicated variables use the push model?

Would kinda make sense since the engine would be able to know when you call Set on them, but we wanna make sure before we think about porting them to C++

[bitter oriole]

Pretty sure they do not

[solar stirrup]

Porting time it is then, wew

[peak sentinel]

I remember there was a console command to enable them though

[jade fractal]

what am I doing wrong? why is current weapon stay empty on the client?

Client:
Server: Weapon

[solar stirrup]

I guess that works for props defined in C++

[peak sentinel]

Should not matter since all UPROPERTY but I never used yet

So if its not working its because of something else

[jade fractal]

Also, the weapon itself spawns on the client

but the variable still stays empty on the client

[twin juniper]

I am having some problems with replicating sound effects for every client. Does some1 know how that works and might give me a solution for it?

This sfx works fine for every client. Its called in Character BP

Every sound that comes from this bp can only be heard by server

This events are in the gamemode bp

[quasi tide]

Gamemode only exists on the server.

[twin juniper]

So how does the multicast events work in gamemode then?

It doesnt calls on every client in gamemode?

[quasi tide]

They don't. Because the object literally doesn't exist on clients.

[twin juniper]

Oh

Does that count for the other bps also, i mean every bp exept of character

[quasi tide]

No. I'd recommend reading the Networking Bible that is pinned in the channel.

Reading through it a couple times even.

[twin juniper]

Okay ill spend some time with it, thanks XD

When i find it.

[quasi tide]

It's the 3rd one from the top...

[twin juniper]

compendium?

[quasi tide]

yeah

[twin juniper]

Ok! Ty

[graceful flame]

I'm just starting out using Bitwise operations to help reduce network traffic size but I'm not 100% sure on how to refactor existing code. For example I have a bunch of replicated booleans, floats, and ints that should be optimized into a better structure.

Is it just a matter of creating various ENUM structs with strings in CPP and then set their values using a bitwise operator during a multicast? Then on the client side I can just use something like tick to constantly listen for a change in the ENUM to then trigger my bools, floats, and ints to change as normal? Is that correct?

This second screenshot is at the end of the multicast and the first screenshot is an event that fires during tick. Is that right?

[winged badger]

generally

you'd have a replication callback when your bitpacked integer changes

then you can compare the per/post replication bits and trigger per state callbacks from there

there is no point in plugging it on Tick, and some of those callbacks can grow not to be cheap

void ADoorBase::OnRep_DoorState(uint8 OldState)
{
    const uint8 ChangedStates = DoorState ^ OldState;
    for (uint8 i = 0; i <= 5; i++)
    {
        const uint8 TestedBit = 1 << i;
        if ((TestedBit & ChangedStates) != 0)
        {
            if ((TestedBit & DoorState) != 0)
            {
                AddDoorFlag(TestedBit);
            }
            else
            {
                RemoveDoorFlag(TestedBit);
            }
        }
    }
}``` example of testing difference for 6 different states packed into one byte

[graceful flame]

Ahh so I should be using repnotify on the "test network enum" to compare before and after bits (using bitwise operations) then trigger the stuff I've already setup from there. @winged badger Is that correct?

[winged badger]

pretty much, and also do your networking in c++

BP is pretty horrid

it has 10% of the tools, and half of those are hacks

[graceful flame]

I've setup the enum in c++ by following a guide, so its already using power of 2. Just the testing and setting in BP. Is that still not recommended?

[winged badger]

i generally find it awkward, if you have a mind to use c++

you should do your networking there

[graceful flame]

I'm a total c++ newbie... LOL

[winged badger]

so was every one here at one time

[graceful flame]

I'm using the network profiler a lot and I'm trying my best to reduce waste.

[winged badger]

bandwidth is generally not a problem

unreal is designed to work with ADSL connection, or worse

the chokepoint is usually the time it takes the CPU on server to evaluate actors for replication

[graceful flame]

I'm more concerned about the AWS outbound traffic bill

ahhh okay that makes sense

And for measuring that I should be using the Unreal Insights tool, correct?

[winged badger]

that is pretty decent, yes

but also, and i can't stress that enough

optimizing before you have a game that is somewhat working is usually a suicidal move

[graceful flame]

I'm at a point where my game is working and I'm teaching myself about optimization techniques and taking lots of notes along the way.

[winged badger]

nods