multiplayer

[twin juniper]

Yes that's what was causing the cross over

Which is why I asked if it was only executed on the server.

Good call though,

I'll remove that code

From the player character

And place it in the hud tick

Thank you.

[supple mural]

Hey guys, question: Is Set Actor Rotation not supposed to replicate?

[winged badger]

its fine with IsLocallyControlled() check

its not

[supple mural]

so how can I replicate it? If I do the switch has authority and do a "replicate to server" it still doesn't rotate the client

[winged badger]

then the server would have to replicate desired rotation it got from client

and clients other then owner would set it onrep, or interp towards desired rotatiton on tick

[supple mural]

server would have to replicate desired rotation it got from client
How do I tell the server the rotation and the player I want it to rotate?

[winged badger]

do not replicate that back to owner

or it will jitter, badly

you send an RPC from the pawn you want to rotate

[supple mural]

oh. Then that explains one of the glitches I have in another part.

Right, that's a RPC to server ain't it?

so, my rotation as of right now replicates to everyone but the client

[twin juniper]

@winged badger i just realise,d wouldn't everyone else's hud tick be executing on the listen server as well?

Or does each player's hud only tick for them?

[winged badger]

each machine only has its own HUD

unless its dedi

[twin juniper]

ahh

okay

[winged badger]

then it doesn't have any HUD

[twin juniper]

Got it thank you.

[tranquil yoke]

@winged badger hey do you think we can replicate skeletal mesh ?

i mean the actual mesh ?

[winged badger]

to change it at runtime?

[tranquil yoke]

no, I will construct a skeletal mesh at one client, then i want everyone to have that mesh for that user.
Either i can construct the skeletal mesh for everyone, or construct for one and replicate then use it for everyone else.

[winged badger]

you can't replicate a client created asset

or a server created asset at runtime, because clients won't have it in the package

so your pretty much only option is to replicate the parameters used for creating it

and have everyone construct its own

[tranquil yoke]

we can not replicate asset data as well ?

yeah , that is what i am doing, actually if users are increasing , like if there are 15 users, then last user has to create 15 meshes at once. i am little worried it might be too much, considering it is running on android.\

any way arounds ?

[winged badger]

stagger it so it doens't choke your game thread

other then that, no

[tranquil yoke]

what do you mean stagger ?

[winged badger]

if you need to create more then one at the same time

queue them

and create one by one

[tranquil yoke]

okay understood

thanks

that make sense

[crystal umbra]

@winged badger i still cant figure this out. I have even went into my C++ spawning actor and did the following

    if(SpawnedActor)
        UE_LOG(LogTemp, Error, TEXT("ActorSpawned"));
    FString pos = position.ToString();
    UE_LOG(LogTemp, Warning, TEXT("%s"), *pos);
    GetWorld()->SpawnActor<class AActor>(SpawnedActor, position, rotator, spawnParams);```

[supple mural]

this is how I ended up replicating SetActorRotation future Unreal Slackers people

[crystal umbra]

@winged badger and the function is called every time but no actor is spawning unless i set it to do so on begin play

its crazy that this will not work. The anim notify is executing every print string but the actor is just not spawning

[quick flint]

anyone know what p.NetEnableMoveCombining does

It says "Whether to enable move comining on the client to reduce bandwidth by combining similar moves"

[vocal cargo]

anyone knows how to replicate montages from anim instance?

I can do it from my character, but in anim instance, if I:

1. TryGetOwningPawn
2. Cast that to MyCharacter
3. Multicast() { MyCharacter->PlayAnimMontage }, doesn't work

I guess my question is, how to get my ACharacter from UAnimInstance

[open jacinth]

@vocal cargo if the multicast is call from the server, it will replicate to all instance, if multicast is call from client, i will happen in that client only

[vocal cargo]

it is called from the server @open jacinth

My player calls ServerPlayAnim which calls MulticastPlayAnim which runs MyCharacter->PlayAnimMontage

I think the problem is that MyCharacter doesnt exist?

[vocal cargo]

I get it like I specified here

[austere needle]

So it sounds like the "addforce" is being triggered multiple times on the client. My knee-jerk thought is that the client is applying the force locally, then telling the server it applied the force, then the server is applying the force to the client again, and because of the replication the client then does what the server does and applies the force to itself a second time.

[open jacinth]

@austere needle but i tried using switch authority node before the add force, so client pawn can't trigger it locally

[strong vapor]

[Help] anyone know what settings to adjust and where to throttle networking bandwidth? i've tried putting things in defaultgame.ini and defaultengine.ini but i have no idea if its working.. nothing in my stat net is changing

[austere needle]

I'm not sure then. most of my work in replication is done in c++. If I was in c++ then I would check to see what the local role is and decide what to do off that

so if my local role is auto proxy, then I wouldn't apply the force on replication

but I think checking for authority would get the same result

so I'm unsure

[supple mural]

How do you guys get the player controller/pawn for replication?

[strong vapor]

the player controller doesnt replicate

but the pawn can

and you can get it all off the player state

[supple mural]

how?

[strong vapor]

which is a class that you can find on the gamestate

its an array of player states

what are you trying to do?

[supple mural]

trying to disable/enable input

for some god forsaken reason it's not working in this area of my code but works elsewhere

[strong vapor]

so you're trying to use some functionality on the pawn or player controller..

make sure you're doing it on the server i guess?

and.. you can't call server events on scripts that arent owned by that client

so.. on YOUR pawn. as a player.. you can call a server event on yourself... but if a player presses an input and it tries to get some other script and fire a server event it will fail i believe

you would want to hook up a server event on the pawn first that you got the input from.. be on the server.. then do all your stuff

[Help] trying to figure out how to manipulate network bandwidth settings if anyone can help me

[supple mural]

I see, thanks a lot

[quasi tide]

Here is a simple BP setup to see the roles of my actors. I am only using this on my server and client (listen server). I would assume that the strings only get printed once. However, when I run the game, they get printed twice. Any idea on why?

[open jacinth]

@quasi tide because the world has 2 pawns, so the begin play will fire twice for each pawns, if your world has 3 pawns, it will fire three times

[quasi tide]

But shouldn't the bottom one ONLY print to the screen of the remote pawn, and the top ONLY print to the screen of the server?

[thin stratus]

Yes but you are in the editor as a single process

If you start them as two standlaone games you would have them split

[quasi tide]

Ahhhh

[open jacinth]

@thin stratus i have a question but no one seem to be solve, can you take a look please?

[thin stratus]

Post it again. I just woke up. Will see if i find time

[open jacinth]

im having a problem when replicating movement. I have 2 pawns, 1 client, 1 listen server. In the pawn it has event tick like this. In the Listen-server pawn, it works perfectly ( when it jumps, it will slowly fall down as the result of both addforce up and gravity down). But in client pawn, the addforce up looks like it has double the effect, so that it will "fly to the moon" because the gravity not big enough to pull it down. I tried using switch has authority before the add force node, but result is the same. I tried unchecking the replicate movement of the pawn, and the client works fine, but of course, without the replicate movement, the multiplayer game won't work as expected

[thin stratus]

You need to utilize DeltaSeconds in that screen

But even then, this is not synced behavior. If you do it like that you might get corrections on the client

[open jacinth]

this still make the client fly away, while server while go back to the ground

how should i do it

[thin stratus]

Hm

What are you trying to achieve then?

Slower falling?

[open jacinth]

im creating a grapling hook using same behaviour of this ( add force in event tick), i just want to understand how the add force works, so i can do the rest by myself.

[random nymph]

Does anyone here have experience about launching unreal dedicated server on gamelift with steam enabled and using multiple launch configurations?

[thin stratus]

I'm not sure why it would cause the effect you see. You can try the LaunchCharacter node instead and see if that gives you a better result.

[random nymph]

I have everything working fine if I only use 1 configuration with the initialia aws fleet startup and I can add more configurations fine after the fleet is up. But if I try to use multiple configurations by default the steam fails to initialise

LogOnline: Error: STEAM: Failed to create file: C:/game/Kingshunt/Binaries/Win64/steam_appid.txt
LogOnline: Warning: STEAM: Could not create/update the steam_appid.txt file! Make sure the directory is writable and there isn't another instance using this file
LogOnline: Warning: STEAM: Could not set up the steam environment! Falling back to another OSS.
LogOnline: Warning: STEAM: Steam API failed to initialize!
LogOnline: Display: STEAM: OnlineSubsystemSteam::Shutdown()```

[thin stratus]

No idea what multiple configurations are, but the server shouldn't need to create/update the app id text file

You'd create DevEditor builds of your Server

And make sure to have the Steam binaries with it

[random nymph]

Basically multiple configurations is just how many unreal instances I'm running on one virtual server instance

And the server build configuration is Development

[thin stratus]

Yeah it's trying to create/update the steam_appid.txt which is already in use by the other process

Did you add the steam dlls to the packaged server?

[open jacinth]

@thin stratus i changed to AddImpulse and now it works as expected, thank you.

[thin stratus]

That's something else though

AddImpulse is a one time shock

Like a shockwave from an explosion

Try the LaunchCharacter node

[random nymph]

Yeah I have the dlls. And everything is working if not starting multiple unreal instances by default

[thin stratus]

:/

Does the sme happen on your local machine?

[random nymph]

I have not tried

[thin stratus]

Make sure that steam is off

[open jacinth]

if i use LaunchCharacter node, multi the force with delta time, then the client hook have smaller force than the server, opposite to the AddForce ( which client force is bigger than server)

but with impulse, both client and server has the same force

[thin stratus]

Yeah, use what works for you. It's honestly all 3 not good :P

You are not making sure that the forces are synced between Server and Clients.

Which you also can't without C++

So you will always have some problems anyway.

[peak sentinel]

Sometimes collision fails on client, especially on "PktLag 200", is there anything I can improve the current setup?

[dark edge]

@open jacinth if you're using the character movement component, you should try to do all your movement within the context of the character movement component. for something like a grapple hook, you would have to make a custom movement mode. Using forces is going to be janky as f***, probably usable in a single player game, but for multiplayer, you need to learn that movement component in and out.

[thin stratus]

You should not deal damage on Clients to begin with

Yeah it's new, Adriel

Also your Actor, the one that this code is in, has its own HasAuthority node

No need to query the Instigator

And is that actor owned by the client? Otherwise your OnHit isn't reaching the server anyway

Also don't see why I needs to

Hit should already execute on teh Server

The only thing the client should do is show some hit effects

And if they are dopped in a 200ms situation

Then you shouldn't care

Only thing you can improve is to not destroy the actor instantly on the server

But give it 3s delay or so

And use an OnRep "Disabled" boolean to hide the actor

Because you might destroy the actor before the client can play out effects

[dark edge]

@open jacinth a grappling hook is fundamentally a constraint, so you'll want to make a swinging movement mode, just like how there's a walking and flying movement mode already in the movement component

[peak sentinel]

Okay eXi, thank you, especially that 3ms delay trick was an awesome info to know

[dark edge]

You could hack it together with forces assuming forces work well on a character, but in multiplayer it would be a nightmare

[open jacinth]

@dark edge okay i will notice that, im just learnt for a few weeks, need more knowledge to solve this

[winged badger]

@crystal umbra now when you actor fails to spawn

open your output log, and filter it by LogSpawn

[meager fable]

Anyone tried replicating motion controllers in blueprints? Here's how i'm doing it right now to no result

the code on the bottom is in tick

all of the rep notify functions are the same

without the code only the position of the server hands would get replicated correctly

but right now the server has some jumpy movement in hands and the clients still dont replicate correctly

[kindred widget]

You need to RPC. You're asking if it's locally controlled and then inputting the values into a local function. Your ServerUpdateVRTransform thing isn't an RPC.

Make sure your transforms are set to skip owner, and change that Event to a ServerRPC. I think it'll work then.

[meager fable]

wow I forgot to mark that as an RPC XD

[kindred widget]

Don't forget the skip owner part too! Otherwise the server will overwrite the owning client and it'll probably feel weird.

[meager fable]

Thanks, never knew that was an option

[peak sentinel]

Could this be the reason why server overrides my clients roll direction? I am getting input data and calculating vectors from mouse input

[kindred widget]

Possibly. If you're doing something from a client and you just want to reflect that on other clients via a replicated property, usually you'll just skip owner because you don't want the server to overwrite what the owner is doing.

[peak sentinel]

Its weird server can override the root motion movement tho 😄

[rose egret]

what's the easiest way to sort replicating actors of a connection? I want the close characters to be replicated with higher priority

huum I guess I found it. GetNetPriority

[winged badger]

yeah, no

easiest way is deep engine override

[thin stratus]

Sounds like ReplicationGraph to me :D

[winged badger]

but gathering relevant actors with normal relevancy outside of ServerREplicateActors

sounds crazy

then sort by distance, then interp NetPriority

it would take more CPU then evaluating Actors for replication does

[sacred spire]

does "For Each Loop" node behavior always won't update the last character? I noticed my mesh's character colour won't be given if it is the last client to connect.

For example, if it 3 players total, the 3rd client will get the default UE character mesh white colour. Similarly to the 4th client if the total players in game is 4 players.

it is always the last client won't be getting the colour update.

[winged badger]

doesn't have to do anything with for each

your order of execution is faulty somewhere

[sacred spire]

alright thanks, i go check again

[kindred widget]

Might be worth posting the loop here. Otherwise we're only able to guess at the problem.

[sacred spire]

sure, hold on

https://imgur.com/a/O9iusds

^ the game mode body

https://imgur.com/a/5VMfrqW

the character class ^

https://imgur.com/a/vA6NfQx

color array

[chrome bay]

Delay

There's ya problem

That's never really going to work reliably

[gritty pelican]

can i use Steam Stats for save player Rank?

[kindred widget]

@sacred spire Honestly. Ditch the multicast. You're already setting the integer which is replicated. Just set that in the characters on the server. Make the integer a repnotify. In the repnotify function, let each client set the colors themselves based on the replicated integer.

[winged badger]

multicast from GameMode doesn't strike me as particularly effective either

even if it uses 3rd person character

this is clear OnRep wins vs. multicast situation

[sacred spire]

delay doesn't solve it

my multicast is from ThirdPersonCharacter class, not GameMode

[winged badger]

you put a replicated color variable in the Character

you set color OnRep

and you assign the color as soon as the character is spawned (read: HandleStartingNewPlayer override, after calling Parent)

[sacred spire]

I set replicated on the "color variable" in the character. As for the "OnRep", is it the "All Colors" variable in GameMode?

[winged badger]

multicast here leaves every late joiner, and everyone out of relevancy permanently in invalid state

[twin juniper]

Hey, concerning TArray replication, there is surely more overhead when replicating single members of larger structs than simpler items in the array, correct?

i.e. a struct with two or three member variables compared with a single variable

[sacred spire]

@kindred widget which integer? the one called "Set" in Game Mode?

@winged badger noted, thanks

[kindred widget]

You have a Number integer in the character already that is set to replicate. You're setting it right after the multicast call.

[sacred spire]

Oh okay, i set that to RepNotify now

[kindred widget]

Put the array of colors in the character, or somewhere else easily reachable that exists on all machines like GameState.

Non replicated, the array can be not replicated.

In the OnRep_Numbers function that should have been made when you set that integer to repnotify, get the Number, pick a color from the array where ever you put it, and set the vector parameter.

[sacred spire]

okay noted, gonna slowly digest all these. I am quite slow. Thanks

[hidden thorn]

Just wondering if I am missing something here, is HUD class independent for each client meaning that each client has its own HUD class spawned. The reason why I am asking is because I am Creating a Widget in the HUD class via BP at BeginPlay but it seems that only the server actually has it created.

[supple mural]

@hidden thorn you need to do this

[hidden thorn]

Are you calling that from the Character or from the HUD Blueprint ??

I can only get GetController in my Character

[kindred widget]

@hidden thorn By HUD class, I assume you mean a blueprint child class of the actual AHUD class? And that's on it's beginplay?

[supple mural]

This is from the character

[hidden thorn]

That's correct, I just was unsure how to explain it better.

[kindred widget]

AHUD is spawned once on each machine(Not sure about dedicated servers but I doubt it). Even on the ListenServer. It has no network relevancy and should work as if coded for single player. So what you have there should work fine on any machine. Also, don't bother giving widget owners unless you're making a split screen game.

[hidden thorn]

It just seems wrong doing it in the Character BP

[kindred widget]

I do all of my widget related stuff from the HUD class as well.

[supple mural]

Oh, that's interesting. So you add your widget to the viewport in the widget editor?

[hidden thorn]

I assumed so much but was unsure :D, About not assigning an owner good to know I always do it :D. Regarding the fact that's not showing u[, still not sure why I guess I will have to keep trying and see why its not working.

[kindred widget]

Nothing in that HUD affects it's own visibility?

[hidden thorn]

So if you creating a PB that inherits from the HUD class, it just makes sense that you create the HUD Widget from there, this also gives you ability to have different HUD Widgets for different gamemodes.

[kindred widget]

HUD meaning the widget, not the AHUD class.

[rose egret]

I seriously don't understand why the hell they make useful properties in Actor and other components private, whyyy, I need to edit PreReplication but AttachmentReplication, ReplicatedMovement , are private, :((((((

[hidden thorn]

@kindred widget Not its all empty, if I call it in the LevelBlueprint Beginplay it works though. But let me just try again.

[supple mural]

Oh that's interesting. I didn't know that before

[kindred widget]

@hidden thorn You said it was only spawning that widget on the server?

[hidden thorn]

Yeah

[kindred widget]

And that's in a child of the HUD actor class. You've set that HUD class in the game mode that's being used in that map?

[hidden thorn]

Whether that was the case exactly or not I am unsure, but I can say for sure that only the server had it visible in the viewport.

[hidden thorn]

Correct

As I said, I am trying it again just to be 100% certain as I might've messed something up

[supple mural]

Hey guys, is there a way to 100% disable/enable input for a client?

The way I'm doing it doesn't seem to work reliably. At the start of this function, I call a disable input but it doesn't do anything.

[hidden thorn]

Finally managed to get the HUD Widget showing up, so all the other ones for the MainMenu/Lobby were working fine it was just the one in-game that wasn't. I am not certain what was causing it to not show but I removed any references to it from other BPs and now it works. Luckily it was fresh so wasn't used in only 1 place but even then it was just calling methods from it.

[hidden thorn]

Have you tried GetPlayerController->EnableInput ?? (I assume this is what you tried)

[supple mural]

yup

I'm doing this in blueprints. But I'm willing to do this in C++ if it'll magically start working

[hidden thorn]

I doubt it will 😄

[supple mural]

Yeah, same here

[hidden thorn]

Are you sure you're not enabling it back somewhere else?

[kindred widget]

What do you mean by for a client? What is the use case for disabling the client?

[hidden thorn]

Also what exactly is your scenario, maybe if we get what you are trying to do it will help find a solution.

[kindred widget]

Like for their own UI, or for keeping them from interacting with the server in their owned actors?

[supple mural]

Alright, So I'm doing a grapple system. On Grapple Init (when they press a key) we disable input. Then do our movements and then when we finish grapple we're supposed to enable movement

I'm pretty sure somethings either not getting replicated properly OR I'm not giving it the right inputs

I don't think I can use GetPlayerController because it uses player index and that's no good for replication I think

[kindred widget]

You shouldn't use different input paths for client and server. Just make the listenserver call the same RPC, it works the same way.

And if it's a dedicated server, it won't have input.

As for the input. Target should be Self, PlayerController should be the GetController.

[supple mural]

Just make the listenserver call the same RPC, it works the same way.
what do you mean by this?

instead of using switch has authority, I should run the grapple client?

[loud onyx]

Question about replication! Does anybody know where to find information on this option here, Replication Condition? Context clues give me a little bit, but I'd like to see a breakdown of how each option is handled. Couldn't find in docs.

[quasi tide]

https://docs.unrealengine.com/en-US/Gameplay/Networking/Actors/Properties/Conditions/index.html

[loud onyx]

AH ok. Thanks!!

[vivid seal]

How would you guys do something like Lucio’s knockback from Overwatch? Just have the server do it? Or is there a decent way to do client prediction of AddImpulse or LaunchCharacter? Similarly, something like a Fear effect that forces a character to run in a direction for some time. I would need to check these things on the server and also be able to reject client movement input for a time while this is active.

[supple mural]

don't use LaunchCharacter

My GOD don't use it

play around with the velocity instead, that replicates 100%

[wind oasis]

I'm making multiplayer game and the speed of the characters different but they has the same speed value. how can I fix that ?

[eternal canyon]

if u use launch character

do it twice

once on the server

once on the client

and it should be smoother

[hidden thorn]

Is there like a diagram or something that shows what Classes are Shared between The client/server, only server and only client side. I remember I found one but it wasn't very detailed.

[still path]

If I have a variable in the GameMode set to replicate (say a score), will every player be able to cast to and see that variable or will I have to jump through some more hoops for all players to see the variable as the same?

[thin stratus]

GameMode is not replicated. So no.

You can place it into the GameState though

[hidden thorn]

On a similar note to @still path 's, I inherited from GameState and added some extra variables and set the UPROPERTY to Replicated do I need to set bReplicated and use GetLifetimeReplicatedProps ???

[thin stratus]

GameState should already set to replicate

But you need the GetLifetimeRepl. Function for your own variables

[hidden thorn]

Ah ok, thanks

[still path]

thank you @thin stratus

[limber gyro]

i am calling a custom blueprintimplementableevent function inside my gamemode that comes from the game instance but it only executes on the server

do i need to multicast it?

so that it executes on the players?

since game instances exist on the players aswell i was under the impression that the function would also be called in the clients

[hidden thorn]

@thin stratus If I have a variable like bIsAlive which needs to be replicated I feel that should be on PlayerState, question I had further up apply to this as well? Also is PlayerState the right place to have that sort of info about the character on?

[kindred widget]

@limber gyro Instance exists on all clients. Game Mode does not.

[limber gyro]

oh ok so thats where i am confused so i do have to multicast

@hidden thorn it should be depending on what you want to achieve

keep in mind that playerstates disapear when players disconect

[thin stratus]

Well, info about the Character should probably be in the Character. But depening on your game it could make sense to put it into the PlayerState

[hidden thorn]

I am just trying to keep information's about the player in the current session.

[kindred widget]

Depends on your use case. What are you trying to make happen? GameMode is the inner brain of the server. The decision making place to put stuff that only the server will ever know or see. If it's dealing with all clients and it's game wide, consider the GameState in the GameMode's stead.

[hidden thorn]

@thin stratus Hmm, so what I want to do more specifically is set the character type at the beginning of the game. What I had in mind is get all the connected players using GameState->PlayerArray and then assign it to them, the problem is that that's the PlayerState and unsure how I can get the Character from there

[thin stratus]

Well you can get the PlayerState from the Character

And I think the PlayerState also has a pawn ref by now

Not sure if in BPs

[hidden thorn]

Well, I am doing everything in BP and once its complete and I know exactly how I want it to work I move it to C++

[hidden thorn]

I will take a look at this, thanks

[lucid vault]

Is it better to A) Send variables to animBP from character, when those variables change B) Have animBP grab variables from character every frame in update?

I am currently using method A. But, I'm starting to notice some desync in some circumstances, so I'm debating switching to B

I don't think there are any downsides to B

With method A, if a player joins the game late, the variables won't get set in the animBP, for instance

[kindred widget]

Method B is more common and considered better practice. In fact I believe there are some changes in 4.26 that are even more in that direction.

[limber gyro]

i am calling the following function:

FUNCTION(Client, Reliable)
void ClientWriteMatch(const FString& matchInfo);

and then that function is wraping a blueprintnativeevent

but in the logs it still says the server is calling it

[kindred widget]

What actor is this RPC on?

[limber gyro]

its in the game instance

[kindred widget]

Game Instance is not replicated, it cannot RPC.

[limber gyro]

ummm

ok

i assume the game mode isnt either?

[lucid vault]

Use game state

I figured B was better. The net code for ALS is really not that great :p

[kindred widget]

Clients don't even have a GameMode, so no, it isn't replicated either. It's ServerOnly for security.

I've heard that from a few people about ALS.

[sage creek]

is this a good time to ask for help about a specific issue i'm having?

[kindred widget]

Any time is a good time. Feel free to pose problems or issues whenever if it's in the appropriate channel. People will usually try to help if they're around and have time.

[sage creek]

i'm pretty new to networking so just bear with me on this

[limber gyro]

why the heck cant i get my game instance inside the gamestate

unreal is not helping out today

[sage creek]

this is how damage and launching are SUPPOSED to work

and this is how it meshes with multiplayer

(the guy who successfully launched was the host. no one launches on dedicated servers and are doomed to the pain and eternal boredom of immortality.)

[limber gyro]

ur only launching in the client

[sage creek]

huh?

[limber gyro]

the server doesnt know that you are launching characters so they are being rubber banded back

[sage creek]

oh

so what's the fix?

[limber gyro]

u gotta rpc that

[sage creek]

what does that mean?

[limber gyro]

well the correct fix would be to override the movement component

and make your custom replicated movement

[sage creek]

oh?

how's that done?

[limber gyro]

but if you want the second best option you gotta rpc and launch both in the server and client at the same time

you basicly make a rpc that is going to call a function that will launch your character in the server

google, UE4 rpc's

[sage creek]

i'm so confused what is an rpc

oh

ok cool

[limber gyro]

remote procedure call

beware tho

[sage creek]

oh

[limber gyro]

launch character doesnt work that great over netowrking i think

but u can give it a shot

might still jitter tho

[sage creek]

oh

uhhh

[lucid vault]

You probably want to enable IgnoreClientMovementErrorChecksAndCorrection

[sage creek]

where is that?

[lucid vault]

And allow for the server to accept client authoritative position

In your CMC

[sage creek]

my what?

[limber gyro]

theres a bunch of variables that you might wanna disable for smoother movement

[lucid vault]

Go into your character BP, and drag out the Character Movement Component

[sage creek]

wait, but would that not also allow for cheating using an external program or modified game since it's client authoritative?

[sage creek]

ohhhh

[lucid vault]

You could validate the movement on the server to help guard against cheating

[limber gyro]

ive found that even with that set to false the server still checks for movement inconistencies

[sage creek]

how so?

[kindred widget]

@limber gyro What are you trying to do exactly between game instance and the clients? And which game instance? The one on the server?

[limber gyro]

i mean true

[lucid vault]

IgnoreClientMovementErrorChecksAndCorrection and ServerAcceptClientAuthoritativePosition perhaps?

[sage creek]

wait but where is "IgnoreClientMovementErrorChecksAndCorrection"

[limber gyro]

@kindred widget i am trying to send a string to my clients so i can save it in the save game

[sage creek]

nvm

[limber gyro]

which is in the game instance

so i am thinkin of calling the RPC in the game state and then getting my game instance with the BP event and calling it

the thing is GetGameInstance doesnt exist in the game state for some reason

[sage creek]

i turned on IgnoreClientMovementErrorChecksAndCorrection

the man now still only launches clientside

nvm

ServerAcceptClientAuthoritativePosition is on now

is this even really a good way to be doing this?

[limber gyro]

getworld has getgameinstance

ima try that

[sage creek]

or am i making modern source spaghetti

||well, not source but yknow||

[kindred widget]

@limber gyro All you should need to do, is either set a string variable as repnotify in the GameState, or make a Multicast RPC in the Gamestate when the string changes and use the string as a parameter.

[limber gyro]

@kindred widget

{
    UProjectArenaGameInstance* gameinstance = GetWorld()->GetGameInstance<UProjectArenaGameInstance>();
    
    gameinstance->WriteMatch(matchInfo);
}```

isnt this suposed to work

?

[sage creek]

i just feel like i might be making things hard for myself later on

[limber gyro]

declared as such

    void ClientWriteMatch(const FString&  matchInfo);```

[empty axle]

game instance is not replicated

you can't do RPCs there

[limber gyro]

i am not doing the rpc in the game instance its in the game state

[empty axle]

oh sorry

[limber gyro]

i just get the game instance inside the rpc

[meager spade]

still cant do in the gamestate

[kindred widget]

You need to Multicast. Right now you're telling the owning client to run that code. Server owns the GameState actor. Clients only own Controllers and their controlled pawns.

[limber gyro]

you cant do it in the game state either? xD

[meager spade]

only Multicast RPC's

Client and Server RPC's require an owning connection

GameState is owned by server.

[limber gyro]

ohhhhh

ok so in theory if i change it to multicast it should work

[meager spade]

PlayerController or some Actor whos owner, ultimately goes back to PlayerController

to run Server/Client RPC's

[kindred widget]

Multicasting that should work I believe, yes. It would tell each client to run that on their local gamestate and get their local gameinstance to call that function.

[limber gyro]

if i used the PC i would need to call the function in all PC's no?

[meager spade]

that is how you decide to set it up

but yeah

[limber gyro]

so ye multicast is way less messy

[meager spade]

then your basically doing a multicast 😄

[limber gyro]

indeed

[kindred widget]

Only reason to do it in the controller might be if different clients need different strings for some reason.

[limber gyro]

nah they dont

its for a local match history

o ye its working

thanks guys

i didnt know that the game mode and th game instance werent replicated

i was under the impression that the game mode was at least

[empty axle]

@limber gyro if you care about late-joiners and relevance then you should consider replicating that as a property instead of a multicast though

actually in that case the gamestate is always relevant so that is not a problem for you

but late-joiners are still

[kindred widget]

@limber gyro Nah, the only two strange native actors(note that GameInstance isn't an actor) Are the GameMode and the PlayerController. At least when it comes to networking. GameMode only exists on server, no clients have one. The Controller on the other hand only exists on the owning client and the server. PlayerControllers of other players do not exist on each other's clients. That's one reason why GetPlayerController0 always returns the correct controller for that machine and is generally safe to use either before a serverRPC from input on actors or from UI.

Then again if you're using it for input, usually that's on itself or the character, which can just GetController().

[torpid girder]

Is the concept of a server browser out of date?

[kindred widget]

Like letting people browse for servers to join and play on?

[rotund topaz]

That depends on what you want to do

[limber gyro]

i would say it is a bit outdated

most modern games have match making

at least most AAA ones

[meager spade]

Not all lol

Browsers are common still for custom games etc. But matchmaking is the norm. Both is very common. Again its game dependant. So yeah..

[kindred widget]

Actually it's not really that outdated. Sure, a lot of modern games use matchmaking, but just as many and a lot of them that use matchmaking also allow custom lobbies for players to do their own custom matches, or even for specialized community driven tournaments. And that's just for shooters. Games like Eco, or Ark, that have persistent servers don't usually do matchmaking. RTS games often mix them for the same reasons that shooters do. Custom games and tournaments.

[wide stream]

Hi everyone. Could anyone point me to some examples when UOnlineSession is used? I understand how the various multiplayer classes interact with each other, but I can't seem to find anything reasonable on UOnlineSession. The only thing I've managed to find out is that it's supposed to be a class is intended to encapsulate anything clients (including a listen client) would care about when talking to an online platform (invites, joins, presence, matchmaking).

[hidden thorn]

How can I get the PlayerState from the CharacterClass ??

[quick flint]

Is it just good habit to replicate a uint8 with multiple bitflags than to replicate multiple bools?

A single bool is 1 byte, but a single byte could store 8 bitflags

would love to hear thoughts of others

[kindred widget]

@hidden thorn Which playerstate? the one attached to the controller controlling the character?

[hidden thorn]

I got it, nvm 😄 and yes

Quick question, if I update a variable that's marked as Replicated on the PlayerState will it automatically be updated on all the clients or do I still need to Multicastit?

[kindred widget]

If it's replicated, it should replicate based on it's condition settings normally by just setting it.

[hidden thorn]

I think I messed something up 😄 need to check it

[lucid vault]

I'm having problems spawning an actor and attaching it to a player directly after spawn. It doesn't replicate the attachment

If I put a delay after spawning the actor (before attachment) it fixes the problem

However, a delay seems like a bad solution

Anyone know why this happens?

(I spawn and attach only on authority)

Might actually be because I do the attachment in the Possessed Event

[kindred widget]

I find that Possessed has issues with it's pointer sometimes for some reason. It's often null when I tried using it without even a 0.1 delay in single player.

[winged badger]

which version @kindred widget ?

@lucid vault HandleStartingNewPlayer override in GameMode is the most convenient place to assemble your object graph

[lucid vault]

Well, certain characters start with an item in hand

I figure the best place to have that is in the specific player

[winged badger]

its not, as evidence of you asking the question about it in the first place

when that event (in BP) fires, you have a valid fresh PC and PS

and Parent (unless you want to manually spawn the Pawn) will spawn the Pawn

its a single no-reentry point in the GameMode, that the executon goes through after both PostLogin and HandleSeamlessTravelPlayer

[lucid vault]

Does it run after GetDefaultPawnClassForController?

As I would need to know the character type to determine if the character should hold an item

[winged badger]

default behavior (parent) will call that function

so it gets called by Parent event / Super

by default

so you can put your code before or after the GetDefaultPawnClass, really

HandleStartingNewPlayer_Implementation (native implementation for BP native event) calls RestartPlayer, which calls GetDefaultPawnClass

[lucid vault]

Although, my characters are defined in Blueprints with a common c++ parent. I'm wondering how I can differentiate them from c++ in HandleStartingNewPlayer_Implementation. Would the ideal solution be to create an enum for all character types and assign them to each character?

[winged badger]

well, you can not call parent if you wish

and spawn the pawn by hand

calling GetDefaultPawnClass yourself

you can use TSubclassOf<AMyPawnBase> for the class

but you can't push that into the HandleStartingNewPlayer as an Artument directly

but yeah, easiest way is to just implement GetDefaultPawnClassForController in BP and just call it from c++

(note you can use the blueprint override for HandleStartingNewPlayer, it will work fine)

i did that when i prototyped the current system - PlayerController, PlayerState, AIController, Character, Pawn and one Actor

all linked up and given all the references they need

[lucid vault]

I see. Thanks for the info

[sand iris]

I'm running an automated test in "Play as Client" mode and trying to spawn an actor with a static mesh component but the static mesh is invisible, however, the mesh shows in offline mode fine.

this is the BP code I'm using to spawn the static mesh actor but I think it's only getting spawned on the client and not the server

Ok I figured the issue with the static mesh not showing on the client. The problem was that the mesh was not being spawned on the server.

however, now my problem is that the collider is only on the client but not on the server

so I can go through the mesh on play as client mode (but not on offline mode)

[ocean geyser]

ill try to break this up, im having an issue with replication. at the bottom in the OnRep im having the issue of only the owning client being able to call TeamSet() for themselves and not other clients eventhough the OnRep is running. im changing the color of a mesh on the character based on the team, blue team has the color being blue and red is red, this is handled in blueprint. TeamSet is a BlueprintImplementableEvent. this works as intended, but as stated TeamSet only runs on the owning client so only the mesh on the owning client gets changed (so client 1 can see their own mesh color change, but not client 2)

void AAirsoftPlayerState::BeginPlay()
{
    Super::BeginPlay();

    if (HasAuthority())
    {
        uint8 RedTeamCount = 0;
        uint8 BlueTeamCount = 0;

        if (AGameStateBase* GS = GetWorld()->GetGameState<AGameStateBase>())
        {
            for (APlayerState* PS : GS->PlayerArray)
            {
                if (AAirsoftPlayerState* TDMPS = Cast<AAirsoftPlayerState>(PS))
                {
                    if (TDMPS->GetTeam() == ETeam::Red)
                        ++RedTeamCount;
                    else if (TDMPS->GetTeam() == ETeam::Blue)
                        ++BlueTeamCount;
                }
            }
        }

        UE_LOG(LogTemp, Warning, TEXT("Red: %d        Blue: %d"), RedTeamCount, BlueTeamCount);

        if (RedTeamCount > BlueTeamCount)
        {
            Team = ETeam::Blue;
            UE_LOG(LogTemp, Warning, TEXT("SETTING TEAM TO BRAVO"));
        }
        else
        {
            Team = ETeam::Red;
            UE_LOG(LogTemp, Warning, TEXT("SETTING TEAM TO ALPHA"));
        }
        OnRep_Team();
    }
}

void AAirsoftPlayerState::OnRep_Team()
{
    if (APlayerController* PC = Cast<APlayerController>(GetOwner()))
    {
        if (ACharacterBase* Character = Cast<ACharacterBase>(PC->GetPawn()))
        {
            Character->TeamSet(Team);
        }
    }
}

[winged badger]

yeah, you don't have other player's PCs

so that first if will fail for anything but the owner

if you're past 4.22 i think PlayerState should have a valid pointer to Pawn

@ocean geyser

[lucid vault]

HandleStartingNewPlayer_Implementation won't work for me, because the player starts as a spectator, and is assigned a character after x time. I guess RestartPlayer is probably the best place to attach actors for my case?

[ocean geyser]

son of a gun GetPawn -_-

[winged badger]

if that is what you do to turn the spectator into non-spectator, yes

[ocean geyser]

@winged badger no luck with GetPawn(), now it currently only sets it on the server for the servers character

void AAirsoftPlayerState::OnRep_Team()
{
    if (ACharacterBase* Character = Cast<ACharacterBase>(GetPawn()))
    {
        Character->TeamSet(Team);
        UE_LOG(LogTemp, Warning, TEXT("TEAM SET"));
    }
}

[winged badger]

its PawnPrivate

i assume GetPawn is the function

but

1 - PlayerState and Pawn Actors replicate separately

Pawn will generally replicate first due to higher NetPriority, but that can go to shit with packet loss

2 - PawnPrivate in PlayerState is not replicated, but injected

[ocean geyser]

so should i run a timer until the pawn gets valid for the client?

[sand iris]

how can I get an actor to have collision in multiplayer? any tutorials on it?
I'm spawning an actor with a box collider but I can walk through it when playing in Play as Client mode.

[quick flint]

I want to also know how to do collision in multiplayer

[winged badger]

void APawn::SetPlayerState(APlayerState* NewPlayerState)
{
    if (PlayerState && PlayerState->GetPawn() == this)
    {
        FSetPlayerStatePawn(PlayerState, nullptr);
    }
    PlayerState = NewPlayerState;
    if (PlayerState)
    {
        FSetPlayerStatePawn(PlayerState, this);
    }
}

you should probably use this for the hook

when this happens (the second if)

PlayerState Actor replicated, it has also replicated its initial variables

and only after this line FSetPlayerStatePawn(PlayerState, this);

does the GetPawn() in PS start working

ofc, its not wvirtual, so gg epic 😦

[ocean geyser]

or be lazy XD

void AAirsoftPlayerState::OnRep_Team()
{
    if (ACharacterBase* Character = Cast<ACharacterBase>(GetPawn()))
    {
        Character->TeamSet(Team);
        UE_LOG(LogTemp, Warning, TEXT("TEAM SET"));
        if (GetWorldTimerManager().TimerExists(TempHandle))
            GetWorldTimerManager().ClearTimer(TempHandle);
    }
    else
    {
        if (GetWorldTimerManager().TimerExists(TempHandle))
            GetWorldTimerManager().ClearTimer(TempHandle);
        
        GetWorldTimerManager().SetTimer(TempHandle, this, &AAirsoftPlayerState::OnRep_Team, 1.0f, false);
    }
}

[winged badger]

void APawn::OnRep_PlayerState()
{
    SetPlayerState(PlayerState);
}

can definitely do this

if PlayerState is valid, grab the team ID from it and set color thingy

after Super

timer is just sloppy

you basically just added a Delay 😛

[ocean geyser]

yep lol

ill implement your method, thank you!

[lucid vault]

RestartPlayer won't work for me because I also call RestartPlayerAtLocation. So I overrode FinishRestartPlayer instead.
However, overriding FinishRestartPlayer, calling super, no other code, causes player spawns to break 🤔

There should literally be no difference overriding the function if I call super. I don't understand 😐

ig I will just override both restart functions and call a function from each that handles pickup actors. Kind annoying that there isn't a single function that would be suitable (that I can tell)

[lucid vault]

Damn, the attach method is still not replicating to clients when called from the server inside of the RestartPlayer methods 🤔

[summer tide]

Trying to assign some skeleton meshes to my player in char selection. In the widget I have male and female buttons. The buttons are connected to a player controller which has a rep/notify that assigns the meshes to the character.

[winged badger]

@indigo reef you're not allowed to post discord links here, #old-rules

also, there are job post boards for this

[lucid vault]

It looks like AttachTo is multicasting, so clients that join late don't get the attachment up to date

[quick flint]

How do I setup networked collision

[winged badger]

@lucid vault scene components replicate attachements

but only if they themselves are replicated

so what are you attaching to what?

@quick flint you'll need to elaborate what you mean by "network collision"

[quick flint]

@winged badger if I spawn an actor and setup a static mesh and a box collider the collision isn’t being registered and I can walk though the cube

[winged badger]

all collisions are local

so they work separately on each machine

as if it was a single player

[quick flint]

@winged badger so how do I make it so a player can’t walk through a cube I spawn

[winged badger]

have it block its capsule

and vice versa

[quick flint]

@winged badger yea but it’s set to block all

But it’s still letting me walk through

[lucid vault]

@winged badger The actor that I'm attaching has a static mesh as the root component

I'm attaching it to my characters skeletal mesh on his hand socket

I'm guessing that I will need to use a replicated variable with on rep so the clients also attach

[winged badger]

that is probably preferable to replicating the static mesh component in the said actor

[peak sentinel]

Is replicated variables being networked each frame?

[winged badger]

no

[peak sentinel]

So its not harmful to use for selecting random materials on construction script? (I have 50+ characters)

[winged badger]

what does construction script have to do with net update frequency?

[peak sentinel]

Its not, what I am trying to say I have a variable that I am going to use it on one place but I have too many actors carrying that variable, I wonder if this is going to eat too much bandwith or not

[winged badger]

is that the only thing that replicates on those actors?

[peak sentinel]

No, they have 5 or 6 other replicated variables too

[winged badger]

then it won't make any difference

there is a common misconception that bandwidth is the main problem too, its not

its the CPU time server spends evaluating Actors for replication

you're much more likely to choke your network there then on bandwidth

[peak sentinel]

Understood, good to know. Thank you

[winged badger]

if that was the only replicated variable in an Actor, thats say, pre-placed on the level

then it would be a good idea to have a single Actor replicate that variable for all 50 of them

while keeping the 50 non-replicated

as they wouldn't need to be evaluated that way

it would consume the same bandwidth

[peak sentinel]

What if I have an actor for selecting materials, that when I spawn AI it just selects one material from array/index, and sends it via parameter, since I only have one variable, would that be more optimized?

[winged badger]

and btw, your Actor wants to be checked for replication on its NetUpdateFrequency, which is 100 times a second by default, and imo, way too high

it still won't ever get sent that often, even if you change its replicated variable on Tick

as server won't send everything, but just as much as it can, sorted by NetPriority

not if the AI needs to replicate for other reasons

[peak sentinel]

I am just going to send them one time, when they spawned, if I mark function as reliable, wouldnt it send?

[winged badger]

this would work if you wanted to randomly color cubes on the level and keep it in sync, for example

this is clear OnRep is better then RPC situation

and you can set the replication to InitialOnly

for that variable

[peak sentinel]

Understood, thanks so much for guidance

[kindred widget]

@winged badger Just tested it again, I can't get it to do it in this version at least. When I was having that issue I'm pretty sure I was in 4.24. Sometime early this year. Was a single player project though and I was trying to use the controller's OnPossess, and the pawn kept coming up null without a 0.1 second delay.

To be fair. I could also be remembering wrong as well. I was a couple of months into starting to learn UE4 and was overwhelmed at the time. I don't think 4.25 was out quite yet.

[silent valley]

So I have a very simple Steam test application (using AdvancedSessionPlugin) which worked fine on the official Epic prebuilt engine. After switching to the my source build engine I am getting this error and no lobbies found:

LogOnlineSession: STEAM: Found 1 lobbies, finalizing the search
LogOnlineSession: STEAM: Search result 0: LobbyId=Lobby[0x1860000010BA8F9], LobbyId.IsValid()=true, CSteamID(LobbyId).IsLobby()=true
LogOnlineSession: Warning: STEAM: Removed incompatible build: ServerBuildUniqueId = 0x00c89141, GetBuildUniqueId() = 0x00000000
LogOnlineSession: Warning: STEAM: Unable to parse search result for lobby 'Lobby[0x1860000010BA8F9]'

it's not obvious how I set this up...

there's BuildIdOverride and bUseBuildIdOverride config vars, but how is it supposed to work without the BuildIdOverride?

[silent valley]

ok so it seems if I run a packaged version it has a BuildID, and if I launch from VisualStudio it has BuildID==0 🤷
I can work with this.

[silent valley]

actually, scratch that I'm an idiot I was using an old build 🙈

[hidden thorn]

Are GameStates shared between levels?? So after starting a session, I move to another level the GameState will remain the same (I just want to confirm as that's what I am expecting)

[winged badger]

they are not

they can survive seamless travel if setup right though

[hidden thorn]

Hmm, ok thanks

What would be the best thing to do in the following scenario, I have some replicated variables in the PlayerState the GameState has a PlayerArray which I am using to set the variables on the PlayerState, but if the GameState is removed between travels and so is the PlayerState then what I am trying to do is not going to work unless I make them non-destructible between levels.

[kindred widget]

What is the game type?

[hidden thorn]

Game type?

[kindred widget]

What kind of game is it? Why do you change levels?

[hidden thorn]

Oh I see

So when you initially create the session you are dropped in a waiting level until everyone joins and then you travel to the level where magic happens, I guess you could do it all in one level but this is the approach I initially took 😄

The initial level is sort of a lobby, But you can walk around and what not.

[kindred widget]

Someone might know a different way. Initially I'd assume that you'd save them in a savegame or on the server's gameinstance mapped via the player's ID. Then just have the server reinitialize the states in the new map.

[hidden thorn]

So then is the GameInstance not getting destroyed between travels?

[kindred widget]

By ID, I mean their unique net ID, not player controller iterator number.

And no. GameInstance survives the lifetime of the application.

[quick flint]

remember

by default, the unique id is your computer name + a series of random characters

on steam, its your steam username

[fiery badge]

Hey!
i am trying to creating a Dedicated Server from : https://docs.unrealengine.com/en-US/Gameplay/Networking/HowTo/DedicatedServers/index.html
i am at Step 2:6 -> when i try to generate project it's throwing this Error, can anyone please Help me out

Running C:/Program Files/Epic Games/UE_4.25/Engine/Binaries/DotNET/UnrealBuildTool.exe -projectfiles -project="D:/Sagar/Unreal_Engine/Project/S_ThirdPersonMP/S_ThirdPersonMP.uproject" -game -rocket -progress -log="D:\Sagar\Unreal_Engine\Project\S_ThirdPersonMP/Saved/Logs/UnrealVersionSelector-2020.11.24-18.13.26.log"
Discovering modules, targets and source code for project...
While compiling D:\Sagar\Unreal_Engine\Project\S_ThirdPersonMP\Intermediate\Build\BuildRules\S_ThirdPersonMPModuleRules.dll:
d:\Sagar\Unreal_Engine\Project\S_ThirdPersonMP\Source\S_ThirdPersonMPServer.Target.cs(6,14) : error CS0101: The namespace '<global namespace>' already contains a definition for 'S_ThirdPersonMPTarget'
ERROR: Unable to compile source files.

i did ever things as it is in documents

i checked like ten times

try to google it but no luck

[meager fable]

Is SimulatePhysics replicated? I mean is it enough to call set simulate physics on the server only or do I have to multicast it

[hidden thorn]

Is there anything other than the GameState that holds a reference to how many players there are currently connected, something that might know even between server travel!! 😄

[fiery badge]

#multiplayer message

[hidden thorn]

I think its the class name you are using inside ....Server.Target.cs

The namespace '<global namespace>' already contains a definition for 'S_ThirdPersonMPTarget'

[fiery badge]

okay ?????

so how to solve it

[hidden thorn]

Change the class name to the file name (assuming that's the issue)

[silent valley]

contents of your S_ThirdPersonMPServer.Target.cs file would help

[hidden thorn]

The image above is the content of his S_ThirdPersonMPServer.Target.cs

[fiery badge]

yes

[silent valley]

oh, so it is, then yeah change the name to match the file. As @hidden thorn said the error is because there are 2 class definitions in the assembly with the same name

class should be calld S_ThirdPersonMPServer (and change the constructor name too)

[fiery badge]

i change class name from S_ThirdPersonMPTarget to S_ThirdPersonMPServer but it's not working

// Copyright Epic Games, Inc. All Rights Reserved.

using UnrealBuildTool;
using System.Collections.Generic;

public class S_ThirdPersonMPServer : TargetRules
{
public S_ThirdPersonMPServer(TargetInfo Target) : base(Target)
{
Type = TargetType.Server;
DefaultBuildSettings = BuildSettingsVersion.V2;
ExtraModuleNames.Add("S_ThirdPersonMP");
}
}

[silent valley]

looks ok to me

[fiery badge]

but it's not working

i mean it's throwing error

[hidden thorn]

What error are you getting now?

[nocturne iron]

Is the HasAuthority() check necessary? If i call Server_Attack(), on the client (and vice-versa) wont it just do the check inside the engine anyways?

[hidden thorn]

If I am not wrong, HasAuthority simply checks if the client that just called the Method ... HasAuthority over the current Actor to be able to send the request, so I would that you want it, I think the Multicast_Attack should only be called by the server to update all the other clients, so you don't need the else.

[meager fable]

Is SimulatePhysics replicated? I mean is it enough to call SetSimulatePhysics on the server only or do I have to multicast it

[meager spade]

@nocturne iron don't post in multiple channels.

[sleek current]

are there any resources regarding best practices/optimizations for ue4 multiplayer?

[chrome bay]

It's a pretty huge subject so nothing specific AFAIK

[silent valley]

Any reason why my Windows dedicated server is not connectable via Steam?

LogOnlineSession: Warning: STEAM: Failed to respond IP:82.8.239.49

I have opened the App via the firewall

My linux server is working ok now I have opened all the ports I needed

[quick flint]

Is UCharacterMovementComponent::DoJump called on the server or the client?

[kindred widget]

@nocturne iron If that is from player input?

[thin stratus]

Are you trying to connect via IP?

[silent valley]

sorry I don't mean connect, I am currently just calling FindSessions

trying to enumerate Sessions via Steam

Dedicated Server Linux works ok, Listen Server Windows works ok, but Dedicated Windows is just not searchable...

[winged badger]

is it running on same machine youre searching from?

[silent valley]

I had same warning STEAM: Failed to respond for Linux server until I opened all the ports (27015, 3478, 4379, 4380)

no difference machine

I have tried different machine same network, and different network too

[winged badger]

the only steam API limitation is the server on same machine won't be visible

[silent valley]

hmm I just thought - what if the machines are behind NAT?

does Dedicated work behind NAT?

[royal rampart]

what do these numbers mean (log output from dedicated server)

[lucid vault]

@winged badger I didn't think about replication taking up CPU performance. I have 2,000 replicated actors simulating physics and I am getting bad latency spikes and general network lag. All of the actors are stationary, and the only replication on the actors is the default ReplicateMovement.

Correct me if I am wrong, but from my understanding, my issue is NOT a bandwidth problem, because the actors are not moving, therefore, they are not sending any updated transforms / velocity. It must be a CPU problem then

In which case, I wonder if a dedicated server would solve this problem

[chrome bay]

The trouble with physics actors is they usually are always moving

So they can have a major impact on bandwidth

Even tiny adjustments from the physics engine applying gravity etc.

x2,000 actors - it adds up to a lot

[lucid vault]

What would be a general solution then? You can imagine my level is a warehouse, with lots of boxes on the shelves. 99% of the time the boxes will not be moving

[chrome bay]

Make sure they are sleeping would be the first thing

Network dormancy perhaps

Hard to say

[lucid vault]

Assuming that they are sleeping and not sending transforms, does that mean my CPU is the next culprit?

[chrome bay]

x2,000 actors all with continuously updating transforms is not so simple to do

If they're sleeping they aren't moving in the physics engine, so no updating transforms

but yes, the CPU side is still checking for changes

edit typo

[lucid vault]

I figured :p

Essentially I need to make sure all of my actors are not updating transforms when not moving. Then, if I have CPU problems, I would need a dedicated server probably

[chrome bay]

dedi server will still chug a bit I suspect, it'd be worth considering things like replication graph, possibly network dormancy etc.

lots of work to get 2k actors working reliably

need to profile it to get any real info

[nocturne iron]

i removed it from cpp

[nocturne iron]

yeah, indirectly

[sweet atlas]

learning how to make multiplayer games. basing it on the first person template, the camera rotation is replicated to the server by default, but the other client doesnt see it. (it sees the rotation of the other player's character, but not the camera pitch (meaning the gun is alwazs horizontal)). anyone know how to replicate that from the server to the other client?

[winged badger]

you do have a current pitch on server for every client

send by ServerUpdateCamera RPC under the hood

its accessible (as location and direction of camera) via PlayerController::GetPlayerViewPoint (c++ only)

[sweet atlas]

ah thanks. been able to stick with just BPs so far 😦

[winged badger]

you can manually replicate the ptich

whenever it changes owning client RPCs the new Pitch to server

server Replicates that to allother clients (RepNotify, SkipOwner)

and other clients adjust whatever they need OnRep

[sweet atlas]

seems i can access it in BP using getbaseaimrotation of pawn

[quick flint]

Anyone here have experience creating custom bit flags for the character movement component?

I was curious if anyone knew where I should set it, I found a tutorial which shows setting it on TickComponent but this causes some problems for me

[gritty pelican]

who can help with playfab?

i can't create matchmaking ticket with Region rules

[dark edge]

@sweet atlas use control rotation to drive pitch and yaw

[sweet atlas]

that's done by default in the FPS template, but its not replicated to other client, @dark edge . the controllering client and the server would see the up/down looking, but the other player would not. yaw worke,d becasue its on the whole actor and that was replicated

[dark edge]

@sweet atlas are you sure the control rotation isn't replicated everywhere? It's been so long since I've messed with it I don't remember. I thought it replicated everywhere

[sweet atlas]

all i know is that it wasnt working, even though use control rotation was on by default and that causes it to work on the owning client + server, not on the other client. maybe there was some other issue

[dark edge]

It actually might not since on clients, only the local controller exists.

[languid whale]

I have a issue, I have this third person weapon mesh that needs to disapear when the player is killed but it will only disapear on the host side the client will still see the weapon floating after it has been destroyed. Does anyone know how I could handle this?

This is how it is now set up, the target is the pawn itself

[kindred widget]

@languid whale The weapon itself, not just the pointer, should be set to replicate. Then all you need to do is destroy it on the server.

[languid whale]

This is the Third Person weapon's replication setup. idk if it is good tho, how should I destroy something on the server? Would destroy actor not suffice?

[kindred widget]

Destroy actor is fine, as long as it's called on the server. You should also be certain that you're not spawning a second one on the client that is in the exact same placement, which would make it look like it only works on the server.

[meager spade]

@sweet atlas pitch is replicated..

you are using the wrong function to get your values in the animgraph

everyone always does it when they follow bad tutorials

GetBaseAimRotation() is what you want to pull your yaw and pitch from

[sand iris]

how can I get an actor to have collision in multiplayer? any tutorials on it?
I'm spawning an actor with a box collider but I can walk through it when in "Play as Client" mode.
In offline mode I can't walk through the box collider.

[meager spade]

collisions dont care for networking.

your issue is something else

ie spawning it on server and setting the collision, and not telling the client.

(if you manually set it at runtime)

[sand iris]

All I have is this on Begin Play to spawn BP_SingleMesh (which is just a cube with a box collider)

[meager spade]

ok?

[meager spade]

like i said collisions don't care for networking, the fact you can walk through is something not right with your collisions or what you are doing

is it replicated?

[sand iris]

Yeah, we have the actor set to replicate

[meager spade]

so

why is client also spawning one?

gate your spawnactor behind HasAuthority

[sand iris]

I think begin play is called on the client and the server right? I guess that's why the cube is getting spawned on the client?

[winged badger]

yes

clients instance of the game, aside from replication updates

runs exactly like the server's one

meaning BeginPlay, Tick, Collisions

all is local

[languid whale]

@kindred widget Sorry to bother you again. But I am not sure what you mean with that the client also spawn the 3rd person weapon. How would I check that? And also how would I make sure the destroy actor happen on the server

Also I made this but this also does not work 😦

[sand iris]

@meager spade @winged badger im not following. I check for HasAuthority now before spawning and now the cube doesn't spawn at all in the Play as Client mode.

[meager spade]

but its replicated

[winged badger]

then its not replicated

[meager spade]

client should not run it

[sand iris]

so it should only spawn on the server and then appear on the client through replication? (as opposed to spawning it in both client and server)

[meager spade]

i mean client will get the actor when it gets sent through the bunch

from the server

you cant spawn actors at runtime replicated on client and server, if they are spawned on each. (i mean you can but you have to make sure names match client and server, etc).

so either you spawn it locally and not replicate it

or you replicate it and spawn it on server only.

[sand iris]

I see, I guess that somehow it's failing to replicate to the client then because when playing in "Play as Listen Server" mode it spawns the cube. But "Play as Client" doesn't spawn it.

could it have something to do with this error?
Blueprint Runtime Error: "Accessed None trying to read property Character". Blueprint: BP_HVS_InGame_HUD Function: Execute Ubergraph BP HVS in Game HUD Graph: Setup Listeners for Attributes Node: Listen for Attributes Change

[meager spade]

accessing stuff to quickly

[meager spade]

beginplay != order guarentee

you cant access local player char

and expect it to be valid

welcome to the world of networking.

@sand iris small hack for testing only, put a 1 second delay

before spawning the cube.

and hopefully you can see the issue

[quick flint]

Is there something like this but in Unreal Engine?

[sand iris]

oh wow, that fixed it, thanks! if the 1 second thing is a hack, what would be the proper way of doing something like this?

[meager spade]

ofc there is

always a better way to do things

[languid whale]

So I have figured out that the third person weapon is destroyed on the server but not the client how do I fix that? Does anyone have any ideas?

[quick flint]

@meager spade do you think it could be a good idea to simply create one actor that has BeginPlay and then design my 'execution order' based on that and create a custom "Initialize" function on all my other actors?

It doesn't seem like there is any way to control which actors get initialized first in Unreal

There is no "Script Execution order"

[meager spade]

All actors will call begin play

[quick flint]

Yeah but in different order sadly

[meager spade]

You no guarantee

We managed just fine without hacks

[quick flint]

hmm

how big is ur game

[tranquil yoke]

hey guys, i have this on my server logs

[2020.11.24-20.08.50:405][741]LogNet: Client netspeed is 100000
[2020.11.24-20.08.50:712][763]LogNet: Join request: /Game/360Project/Maps/WorldLevel?Name=localhost-00056D9108D8784C0DE9C46C826677A7?SplitscreenCount=1
[2020.11.24-20.08.50:712][763]LogOnlineSession: Warning: OSS: No game present to join for session (GameSession)
[2020.11.24-20.08.50:713][763]LogNet: Join succeeded: localhost-00056D9108

Does this mean. server is trying to join server ?

[empty axle]

@quick flint your proposition seems okay. You could call some method from that one actor that will define initialization order. Probably some common interface could fit there nicely. I think there is nothing built in.

[quick flint]

Yeah I was thinking the same

[empty axle]

We actually had a little bit different approach. We had component that would check if everything is "synchronized" and then if it is we would fire event to which a lot of components and actors were binded. In our case it was enough

[quick flint]

Do you have an understanding of the character movement component compreessed flags

[empty axle]

Which one

[quick flint]

UCharacterMovementComponent

[empty axle]

I mean which flags. I didn't worked a lot in CMC but I might remember something

[quick flint]

Me and my partner made a custom char move component which inherits from this and we are having some troubles with getting "stuck" in a movement mode, because of how we setup the bit flags

Uhm so

https://discordapp.com/channels/187217643009212416/221799439008923648/600004858698792961

this guy mentioned it

The compressed flags are basically used by the CMC pretty extensively lol

[empty axle]

Hmm no idea about that sorry

[quick flint]

aha

they are very bizarre and hidden d_d

[quaint laurel]

Making a multiplayer platforming game -- Playing as a client feels really terrible and the physics are janky, but the host has no problem. Does anyone have any advice for me?

[quick flint]

its not physics being messed up

its probably server correctoin

open the console and type p.NetShowServerCorrections 1

[hidden thorn]

How can I update a Gamemode that's used on another level before traveling to it?

[quaint laurel]

@quick flint It looks like you're right. And turning on ignore movement correction seems to fix the jankiness, but then the positions between the client and host are desynced

[quick flint]

@quaint laurel you should make a custom character movement component

[meager spade]

@hidden thorn you cant

store stuff in like GameInstance or a GI Subsystem you need to pesist

persist*

and have the gamemode pull that.

[hidden thorn]

I see, just thought there would've been a way, thanks for the answer.

[winged badger]

how can there be a way, as that GameMode instance doesn't exist yet?

[summer tide]

How to get Steam game name for the friend's list/

[twin juniper]

Is it possible for a server to host multiple levels simultaneously? And redirect players to different levels?

[sand iris]

Does anyone know why is this Tick only running on the server but not the client?

[twin juniper]

Is it inside your character BP?

[steel vault]

@sand iris where is the code that appends "Server" to the beginning?

[sand iris]

there is none, when you run the game in Play as Client mode, it automatically adds "Server:" to the beginning of strings printed by the server

[sand iris]

The Tick is inside my test BP. It's just a BP that runs an automated test by simulating player input (like running forward and jumping)

[twin juniper]

and test bp is spawned on both the server and the client?

And its replicated?

[sand iris]

Test bp is part of the world outliner so it's in the map before the game starts.
The BP's parent class is FunctionalTest.

maybe the problem is that the server becomes the owner of the test BP when teh game starts?

[sand iris]

Ok so it seems like the issue is specific to the BP that inherits from the FunctionalTest class.
Tick gets called on server and client for other BPs but for the FunctionalTest BP's Tick only gets called on the server.

However, FunctionalTest's BeginPlay gets called on both server & client.

[steel fractal]

quick question, I cant find defaultengine.ini?
its not in my config fold

nvm lol

[harsh lintel]

I have an AI that is owned by the server, I have a Server RPC in BeginPlay but I get "No owning connection for Actor" error, it's the first time it happens to me but I think I haven't done this through BP with AI

[strong vapor]

yea i dont think you can fire client to server functions on something thats owned by the server

im not sure

on begin play maybe you should just do a switch has authority and only do stuff on the servers end.. and then replicate anything that needs to get out to clients

[meager spade]

nope you cant

only multicasts from server owned actor.

[strong vapor]

@meager spade do you know anything about adjusting network bandwidth settings?

[meager spade]

i just tweaked a few settings but not a lot

[strong vapor]

are these the settings?

This in my Game.ini:

[/Script/Engine.GameNetworkManager]
TotalNetBandwidth=20000
MaxDynamicBandwidth=7000
MinDynamicBandwidth=4000

And this in my Engine.ini:

[/ Script / Engine.Player]
ConfiguredInternetSpeed = 24000
ConfiguredLanSpeed = 24000

[meager spade]

hope you dont have spaces in your ini

[/ Script / Engine.Player] wont parse

[strong vapor]

huhhhhhh???

lolol

ok well lets try this again

also

how can i tell if these settings are working?

im assuming a statnet line

and also if i do a profile... i should see a difference in how high the peaks get

right?

[meager spade]

possibly, i use insights in 4.25

really helpful to see the size of packets also being sent

btw TotalNetBandwidth=200000 MaxDynamicBandwidth=40000 MinDynamicBandwidth=20000 ClientAuthorativePosition=false ClientErrorUpdateRateLimit=0.015f ClientNetCamUpdateDeltaTime=0.066 MaxMoveDeltaTime=0.125f ClientNetSendMoveDeltaTime=0.05

settings i use

[strong vapor]

damn

thats why higher than i thought i could set things

im guessing your game is on a real dedicated server? that has a huge upload speed?

[meager spade]

my home server atm

but i saw these settings somewhere

[strong vapor]

oh right on

[meager spade]

and they work nice

one of the epic team posted them

[rotund sapphire]

you can probably bypass the limits simply by sending rpcs via reliable

[strong vapor]

and those settings go in game.ini

correct?

[meager spade]

yeah under networkmanager

[strong vapor]

gamenetworkmanager got it

[twin juniper]

Perhaps a stupid question?

Is it possible to replicate an event from a scene actor to the server, then multicast to all clients?

I read somewhere that it isn't..

I can't seem to get it working though, although the same setup works just fine when called from a player

[open jacinth]

if that scene actor isn't owned by invoking client, then that event will be dropped

[twin juniper]

Ahh, thank you so much, I wasn't really sure if what I read was correct, and couldn't find anything on the documentation, so honestly, 10 hours thinking I had done something wrong somehow ha, thanks.

[rare oak]

hey all, should GetLifeSpan() return a replicated value to clients without authority on an actor? I always seem to get 0 back

https://github.com/EpicGames/UnrealTournament/blob/3bf4b43c329ce041b4e33c9deb2ca66d78518b29/UnrealTournament/Source/UnrealTournament/Private/UTProjectile.cpp#L409

I see them use it like this in the UT projectile code, but it doesn't wanna work for me 🤔

[quasi tide]

I've been running into an issue with listen servers. It seems like my AI position is getting out of sync on the client side. At least this is what I'm guessing based on my tests. I am working on an FPS and I am doing a line trace when I shoot. When the line trace hits something with my interface, it will do damage to it. My AI has a stagger montage that gets played when it gets hit.

On the server, I can hit the AI anywhere and it works as expected. On a client however, sometimes the line trace doesn't seem to register, even though it appears that it should on the client side. An example would be that the server can hit the AI's hand and it will stagger, but the client side, sometimes they can, sometimes they can't.

I don't do anything with movement in the BP as of yet, I just made sure that they are replicating. I am only using root motion from the anim montage as well. Any common pitfalls that I'm missing?

[kindred widget]

@quasi tide Well, it's safe to say that the server and client will be out of sync with animations. That's one major reason you shouldn't do server authority only hit detection in shooters based on the mesh. It's often semi fine on capsules, but the mesh location cannot be exactly promised due to the way that the time difference from server to client movement and animations work.

[toxic lion]

Hello. moving question here. I'm having an issue I haven't gotten around yet.
When spawning item in third person arms, the owning player still sees the item that is spawned, even though the item's skeleton is set to 'Owner no see' via blueprints

The server sees everything as it should, however the clients are all having this issue

[kindred widget]

@toxic lion Third person arms? O.o

[kindred widget]

How is that spawned/created?

[toxic lion]

one sec, trying to grab the bp screenie

[quasi tide]

Then how is the common way to handle this? If I use the capsule based approach, I can shoot over the shoulder of the AI and it be registered as a hit. Am I missing something?

[toxic lion]

1 https://blueprintue.com/blueprint/6eto9_n5/

https://blueprintue.com/blueprint/tsytdzvz/

I'm trying to avoid having to create a TP_Item version of the FP item for each item that can be picked up

[kindred widget]

Really depends on your intended experience. But in short, basically you want to find a way to allow a client to shoot and hit on their own machine, and tell the server what it's done. Then the server can run a multitude of checks to prevent cheating as much as it can.

[toxic lion]

here's a pic of the BP_Player Equip since it actually shows the events that are ran on the server

[quasi tide]

Alright - it's probably the checks that I'm failing on, because the client does do the line trace on their machine as well. It's a co-op game, so I don't care too much about cheating honestly.

[kindred widget]

@toxic lion And you just have OwnerNoSee set to true in the blueprint itself?

Can I ask where this execution line starts from? What is calling it?

Because right now you're only telling it to do something if it's on a non locally controlled version.

[toxic lion]

@kindred widget I don't have it set in the BP itself. If I set that, then the items can't be seen in the world

the very base of it is the item getting picked up

[kindred widget]

Okay. That's likely why you're seeing what you are. See, if the client picks something up right now. You're making a server RPC to tell the server to spawn and attach this item. When this hits EventAddItem, this will run for any client, but not a listenserver. Because the Listenserver's character is locally controlled, and you're doing nothing on IsLocallyControlled right now. Where as when a client runs this from their server rpc, their character is not locally controlled on the Server.

So. In relation to your first issue, this isn't actually the server seeing things right, this is the server not spawning the item for themselves.

[toxic lion]

yes! I think some debugging showed that IsLocallyControlled wasn't running at all. you're right

not quite sure how to continue from here, but i do believe you hit the nail on the head there

[thin stratus]

Your Branch is flipped, isn't it?

If it's locally Controlled

Then you can perform ServerRPCs

If not, then you are either on the Server that looks at someone elses pawn, or on a simulating client

Although the HasAuth might want to go in front of it

[kindred widget]

His problem is that he already did a server RPC long before calling that. So he was on the server before that interface was called, which means that the IsLocallyControlled would only ever return true on the listenserver character. And he was only doing logic on the false side of the branch. The True event wasn't hooked up.

[thin stratus]

Yeah that sounds correct then

The branch is still flipped, either way

[twin juniper]

Hello,

I was told that a scene actor can't replicate to the server.

As a workaround, I tried using an event dispatcher, to call an event from the Level Blueprint, which still failed to replicate to server and then to all clients.

Does event dispatchers not work to the level blueprint from a scene actor either, or am I doing something else wrong? :)

[thin stratus]

I was told that a scene actor can't replicate to the server.
What does that mean?

Do you mean that you can't run a Server RPC on an Actor that is placed into the Scene?

[twin juniper]

I basically have a light switch, telling the server to turn off all the lights, and then telling the players :)

But it wouldn't work

[thin stratus]

Yeah okay, an EventDispatcher is not gonna solve that for you

[twin juniper]

Ah ok

[thin stratus]

You have to first ServerRPC in your Character/PlayerController

And then perform the logic to Interact with the LightSwitch

So that the Server knows "Player wants to interact." and then performs the interaction for them

You can always, in addition, interact on the client for instant feedback

[toxic lion]

hmm, im still a bit confused about the RPC calling the pickup action. once the item is picked up, I'd like for it to be equipped, so I assumed I could just keep running a series of events down the line

[thin stratus]

So basically -> Input -> ServerRPC -> Interact

[toxic lion]

i will swap the branches however

[thin stratus]

And NOT Input -> Interact -> ServerRPC

[twin juniper]

Thank you for the reply,
I will give it a try! :)

and when i read that, i realise that im being an idiot. :P

[thin stratus]

If you are already on the Server with your code, why do you need to communicate with the Client? Can't you just continue without RPCs, perform your equip and then let replication handle the equipping for the Client in form of an OnRep variable?

[twin juniper]

Would it be feasible to create a blueprint which handles all the server events, and just dispatch to that blueprint?
If so, is there a specific blueprint type I would need to use, thanks in advance everyone.

[toxic lion]

great question. Besides incompetence I don't have a good reason. I'm trying to figure out the correct work flow, but unfortunately I'm not quite there yet with understanding how to handle networking
On a side note its you! I'm about 1/2 way through reading your compendium. fantastic stuff btw

[twin juniper]

^just to keep everything together, I'm getting so lost as I develop this lol

[kindred widget]

@toxic lion Basically, ditch everything between EventItemAdd and SpawnItemInSocket. And connect them directly.

[toxic lion]

unfortunately it's about putting it into practice after reading the material and trying to understand how/why it works

[thin stratus]

Hm, not really. You can add an ActorComponent to your Character or Controller and tell that to do your stuff.
But in the end you are just moving code around. The important thing is that your Client can only perform ServerRPCs on Actors that are owned by him (the Light Switch is not)

On a side note its you! I'm about 1/2 way through reading your compendium. fantastic stuff btw
Glad it helps (: and yes, putting it into practice is a different story

[twin juniper]

Got it, and Amaze has sent me your guide, thanks to him, and I will give it a read too!
Looks detailed, awesome resource.

[kindred widget]

Make ItemInMainHand a replicated pointer with RepNotify. Presumably the item you're spawning is already replicated. When ItemInMainHand replicates, set your visibility or whatever based on whether it's locally controlled.

[thin stratus]

Yeah that's what I also do in some simpler inventories

[toxic lion]

thank you. let me give that a shot. may take a few to decouple

[twin juniper]

I have set the light switch as an actor, and set the events like this.
Everything is set to replicate (the actor and light), but still doesn't seem to work.

Doesn't print either Server or Client either.

Please forgive me if I'm misunderstanding.

I genuinely appreciate your time to help me.

[thin stratus]

But

[twin juniper]

Side note, "ToAll" doesn't print either actually

[thin stratus]

I already told you you can't perform ServerRPCs in that actor

You have to do that before you do your Interaction stuff

The Actor can replifcate variables and Multicasts

But not Server and Client RPC

Unless you change the owner to the client, which can only be done on the Server (so same problem) and would only work for one client at a time

So perform the RPC before you interact

In addition, you should not handle STATES via Multicasts

STATES should be OnRep variables

The Multicast fires for everyone in range

What if someone joins? They will never get that event

But they will get the OnRep call of your varaible

So if you change somethings state, e.g. Light on/off, then you have to use Varaibles set to OnRep and not Multicasts

Multicasts can be used for things that need to happen NOW and aren't interesting anymore afterwards

[twin juniper]

Oh, gosh I'm so confused haha.

How would I perform the RPC before the interaction.
and okay, I will make sure to use a repnotify instead. I hadn't considered someone joining after, doh! :P

[thin stratus]

Like the click sound of the lightswitch

[twin juniper]

Okay, multicasts for in the moment, forgotten after sorta things

[thin stratus]

How would I perform the RPC before the interaction.
Somewhere you have a Key Press

And that is followed by some line trace or so I assume

And that calls the Interface function

The ServerRPC needs to be between Key Press and LineTrace

So that the Server executes the LineTrace

And then calls the Interact Interface

[twin juniper]

Ohh okay

[kindred widget]

@twin juniper This is what you're trying to do. This needs to be in your character where you're line tracing to hit the light on the client.

And that event needs to be a serverRPC.

[thin stratus]

I would argue that you want to do the ServerRPC before the trace

But that's just cheat vs no-cheat

[kindred widget]

Probably. I'm just so used to allowing client input and on the server double checking via distance, a trace or two and such.

[toxic lion]

alright so i've rerouted, and I can spawn in the item in first person and see it all well and good.
Third person still issues however.
I do have other RPCs in between. sounds to me like I then also need to remove those as well right?

when I attempt to pickup an item

it eventually runs this RPC

[kindred widget]

Unless there is another RPC in between, this RPC is unnecessary. You're already on the server from the RPC after the client's interaction input. It won't hurt anything, but it doesn't actually do anything either.

[toxic lion]

okay, for the time just turned off replication on that event as well

So I'm at this point here, where third person isn't firing

though, I now think that is to be expected

[kindred widget]

Unfortunately this isn't where you want to split the islocally controlled. You're still on the server. So when this is ran, this will only ever go to the true branch when it's the ListenServer's character.

[twin juniper]

Okay, I got it working, thank you both very much! :)

[toxic lion]

hmm okay, so it sounds like I need to somehow leave the server?

[kindred widget]

Sort of. If you want to simplify it, the easiest way is to use a replicated pointer to the spawned and attached item and let the client handle it's visibility.

[thin stratus]

The Struct can be a replicated variable at this point

And then in the OnRep you can do that IsLocallyControlled stuff

[toxic lion]

alright alright. thank you both again. let me see if I can work that out

[kindred widget]

@toxic lion To clarify for the IsLocallyControlled, that is just a simple check to ask if the local machine owns the pawn that the code is running in. By default, clients own their own controllers and their controlled characters. So this boolean would only ever be true if it's running in the version owned by the local machine. Therefore if client 2 ran this in client 3's character, it would be false, if the server ran this in client3's character, it'd be false. If client 3 runs this in client 3's character it'll be true.

Normally you use this on events that get ran in every machine like beginplay or OnReps to differentiate behavior for just the owning client vs the players that aren't controlling the character.

[toxic lion]

okay that is starting to make some sense

the is FP boolean dictates who the item is visible to

at the moment the Spawn Item In Socket leads to a function that calls this non replicated event on the server

and this is the last stop

the material is for debugging purposes. for some reason the material isn't actually being applied in game, odd, but besides the point

at the moment the third person item isn't spawning though we are going into that branch

[thin stratus]

If you just need to toggle visiblity based on ownership, you can use two meshes and set them to OwnerNoSee and OwnerOnlySee

These are booleans on the Component

[toxic lion]

I'm trying to do so with the following:

one gets correctly assigned to 'Only Owner See' however the second one doesn't get assigned to 'OwnerOnlySee'

[thin stratus]

You usually set that on teh component before runtime

[toxic lion]

ah so if I'm not able to change it at runtime?
Otherwise, I don't see a way of hiding the item's visibility to the user

[thin stratus]

This is more something like an overall setting

If you want to change visibility runtime, you would change just that, visibility

[toxic lion]

that won't work though because no one will be able to see the item

maybe my logic is flawed here but here's the rundown

player picks up object
The owning player then spawns 2 instances. one that only he can see (in his FPS arms)
and one that everyone else can see (in his TPS arms)

if i just toggle the visibility to them, then no one will be able to see them afaik

[tawny mason]

Hi guys! Has anyone had to fight the replication of movement for AI ? i'm having a bunch of trouble moving 9-18 AI characters in a replicated scenario, just the movement replication is pushing the server hard.

[thin stratus]

Welcome to UE4 and CharacterMovementComponent based Movement Replicatin.

I haven't had the joy of optimizing it yet, but it's def known to be a problem

[twin juniper]

Not sure how / if you can with UE4, but set a perception cone on the player, and degrade the network rate when the AI agent is out of view.

and range

[tawny mason]

I don't think that would work, since they are mostly all in-sight of at least 1 player

There aren't any params i could tweak or some way of optimizing this ? Seems rather odd to have this much trouble just moving AI around.

[twin juniper]

I just realised you said about server performance, and not client..

Sorry

[tawny mason]

No problem 😄

[empty axle]

Did you already profiled the server?

[tawny mason]

yes i did

[empty axle]

can you share the results as a screenshot?

[tawny mason]

Those are the values on a given frame for the AI character

[empty axle]

I mean the cpu profiling

[tawny mason]

CPU side they are fine, it's the networking that is not

i'm aware 4KB/s is a lot, i just want to get that down, but as you can see it's just 8 calls.

[empty axle]

4 KB for all the AI movement?

[tawny mason]

yes, but they are just 8 characters

is it not a lot ?