multiplayer

[drifting plank]

This will work !

I did the server call on the player and not on the actor itself ... Sorry

It was that

You are forced to have an owner to call a server event so. You need to call the server event on your player before to do anything else.
And not directly on the interacted actor.

[winged badger]

@steady briar Input action -> ServerRPC to let the server know about it -> Handle interaction on server side -> replicate results back to clients

[steady briar]

ok what is "ServerRPC" i know it as a term just not as what to do with nodes

[drifting plank]

It's what I called a server event 😉

[winged badger]

Custom event replicated to server, reliable is good for this

[steady briar]

which is.... a custom event that is run on server?

[winged badger]

also, read Cedric's compendium

[drifting plank]

yes

[steady briar]

i have read it

[drifting plank]

Sorry I miss that part...

[steady briar]

and trying to figure out the docs

its easy to say things like "server needs to do this" but actually doing it isnt easy for me

and im not just trying to hack something in to work, im trying to understand it. the compendium is good and all but i still get lost by it

[winged badger]

as long as you can track your execution, its almost straightforward

[steady briar]

well i thought it was straightforward except it absolutely didnt work T_T

[winged badger]

so, server and client have the "same" actor

[steady briar]

now i have a spider web of functions that i cut out but didnt want to delete incase i go back to trying that. might just delete and start over again

[winged badger]

say its your PlayerPawn, and its replicating

each of those actors is largely independent

[steady briar]

the entire thing worked if i changed 1 part to an overlap event instead of a custom event. thats what confuses me

[winged badger]

meaning aside from server being able to replicate the variables set to replicate and both being able to send to exec to the other one via network events

they are independent

[drifting plank]

Event 1 : Input (Calls event2) --> Event2 ServerRPC (Calls event3) (On player pawn)
Event 3 : Custom event (Do some logic and call event4) -> event4 Call MulticastRPC to feedback all clients (On your interactable actor)
Event 4 : Do some feedback
That's the right workflow

[winged badger]

sometimes 😄

i prefer to take it easy on Multicasts if i can avoid it

[drifting plank]

@steady briar The overlap is called both on client and server

[steady briar]

ya i know that part. cedric explained that to me a while ago.

[drifting plank]

So the server calls correctly your logic on your rock

[steady briar]

ok so this is in the character now

[drifting plank]

So what is wrong ?

[winged badger]

the reference is null

in server

right?

[drifting plank]

If the actor is not replicated

[winged badger]

you can

[winged badger]

@steady briar

[steady briar]

i dont get the print so it is not even getting that far

i dont know what u mean by reference is null

[winged badger]

you can't juggle references like that

[steady briar]

what reference?

[drifting plank]

From where come the blue pin in your first image ?

[winged badger]

the one plugged into the Cast object pin

[steady briar]

blue pin is for a function that isnt being used

[winged badger]

that one is invalid

[steady briar]

the cast to object is so that it casts to the correct object

[drifting plank]

Your object you cast

[winged badger]

you need to add an input of type Actor i'm guessing

to your server event

connect the pin going to the cast node into the node that calls the server event

and connect the cast to the pin coming out of it

[steady briar]

brainsplosion right there....... wut

[winged badger]

the only way to send information to the server

like an actor reference

is to push it as an input on the Server Replicated Event

anything else will fail

[steady briar]

so the cast to pin isnt actually used?

[winged badger]

what comes into it is atm NULL

[steady briar]

it works fine when using overlap, it handles everything that differently?

comes from this

[drifting plank]

Overlap is called on client AND Server !

[steady briar]

yes i know its called on both

[winged badger]

because with overlap client and server independently of each other use a reference to whatever is on the other side of that blue wire

[steady briar]

but that wouldnt change how i get that blue pin

[winged badger]

how you get it is irrelevant

[steady briar]

right it just needs to be passed through

[winged badger]

step 1 - click on your red node SRV_InteractionStart

[steady briar]

to the server event directly, the cast to doesnt do it, right?

[winged badger]

step 2 - in details panel add an input of type actor

step 3 - connect that blue wire coming into the cast node into the blue SRC_InteractionStart node instead

and then step 4 will become obvious

[steady briar]

ud think obvious...

do i remove it from the cast?

[winged badger]

yes

[drifting plank]

If it's an input you reference on client will be set but not on server

[winged badger]

you connect the cast to the new pin on red SRV_InteractionStart you'll get

what happens then is Client calls SRV_InteractionStart

[steady briar]

ok i think its working... but... so................................ was 99% of my problem that i plugged into the cast and not the server node?

[winged badger]

and tells the server "I want to interact with this actor (valid NetGUID provided)

[drifting plank]

You set the object only on client

[steady briar]

i was really unable to test why things went wrong. did a lot of prints (between almost every node) and never figured out why it wasnt still going through

[drifting plank]

So the server doesn't know him

[steady briar]

well i thought if i had the server run the function it would have the info

[drifting plank]

You had just to get your object and check if it's valid

On the server

[steady briar]

ya my biggest mistake was thinking the cast would carry that into the server node

[drifting plank]

Zlo So it's basicaly a passing of a memory address through the network, right ?

[winged badger]

server will try to run whatever is connected to the cast input

[drifting plank]

Or it's abstracted to an ue4 reference to a similar object ?

[winged badger]

but if its an exec chain it will return null

RPCs pass NetGUIDs to reference objects

[steady briar]

so i wouldnt need any switch has authority in this would i?

[winged badger]

as memory address would be more then a little useless

any input whatsoever

happens only on the machine your player is playing from

server can't magically know you hit your E key unless you tell it "hey i pressed E (Standard binding for interaction), now interact!"

[drifting plank]

Of course, thanks for the explanation 😃

But in c++, does it do the same ?

[winged badger]

anything replicated or loaded from a package

can be referenced over network

you can pass a reference to a non-replicated actor as long as it was part of the level

and not spawned during play

so anything connected to an InputAction happens client only @steady briar

(unless you happen to be listen server host, in which case its server only)

[steady briar]

hmm.... well it hurts my brain and im still figuring some stuff out but thanks for the help ppl~ much appreciated.

[winged badger]

at one point, it will just click in place

[drifting plank]

While you are here Zlo, I have an issue with relevancy 😦

I have a map generated procedurally and in my hierarchy I have some objects which are parented.

All these actors are replicated to be relevant only when the players is near.

The first time, all works. But when I move to an another location and back to the first place, some objects are detached on the client. But the server doesn't have the issue.

have i missed something with the relevancy ? Is that work for children actors ?

[winged badger]

those objects are set to replicate, yes?

[drifting plank]

Yes all objects

They dissapear when I'm too far and reappear when I'm near

[winged badger]

how do you know they are detached?

[drifting plank]

I see them on the client hierarchy

[winged badger]

check their NetOwner

from the start, they might had never been attached in the first place

you can try force the issue with bUseNetOwnerRelevancy, if the NetOwner's good

[drifting plank]

In the c++ the attach function is called. But i will check that

[steady briar]

ok so can i post what i have now (i think its working properly) and see if im doing something wrong?

[drifting plank]

Of course

[steady briar]

ok so this is my char (not showing how i get the object from the array its huge and posted earlier)

the animation stuff is placeholder til i set up an anim blueprint

this is the rock

definitely more organized than my usual splattering of nodes

well everything is placeholder but its about the flow that matters. i can do visual stuff later

[drifting plank]

How and when is called interaction complete ?

It seems fine !

[steady briar]

at the bottom of character

[drifting plank]

Oh yes I did'nt see that

[steady briar]

this is the basic overview of how mining interaction will go, so ya unfortunately a bit of back and forth. as long as all interactable objects have a start and finish, i can fill in the middle with other nodes

so if i go up to a tree that is choppable, InteractionStart will be there. it can bring the rest of the functionality specific to the tree

[drifting plank]

So you just need a stop interaction to cancel the rock destroying

[steady briar]

ya im going to work on that when i figure out the animation thing

because movement/getting hit will interrupt the gathering and the animation is actually the entire length of the interaction

i have a crappy "play animation" spliced in there but its not what i want. i think ill need to make something in the anim blueprint to cycle an animation X amount of times

and adjust the play rate of the anim

thats where Number Of Hits comes from, it gets that variable from the rock so it eventually will know how many cycles to do. couldnt get a loop to work but i feel like setting anims like that isnt the right way anyway

[drifting plank]

But I think you need to put the delay before destroying on the server.

Rock need to call the startMining.
Rock know his state along the time.
if time is reached rock call stopMining to the client and explodes

[steady briar]

also going to have to set a lot of bools in places

well mining speed will be variable based on the player and number of hits, so theres no exact amount of time the rock will know. i figured i would just tell the rock to "Complete" when the animation is completed without interruption

[drifting plank]

I correct !

Client needs to start to mine.
The rock start to be mining. A timer is start with a specific time. And rock call startMining to the player.
If client decide to stop to mine. All is canceled. And rock call stopMining.
If delay is reached. rock call stopMining and feedback that it is destroyed.

You just have your mining delay at the wrong place.

[steady briar]

i cant just set a delay in the rock though, it wont know how long it needs to be mined

[drifting plank]

Hum it's the player which know that ? It's strange 🤔

[steady briar]

the players mining speed can change, or something like critical hits might count as 2 hits. hard to predict all that

[drifting plank]

It's more the rock which have a specific value

[steady briar]

the amount of hits needed will be in the rock. how fast the player can swing the mining pick is in the player. change for double hit etc...

[drifting plank]

Oh so you need to pass some informations to your rock like

miningSpeed and miningDamage

[steady briar]

i was just going to use it like a simple health system.

[drifting plank]

And in your rock, you called a timer which loop and handle each hit.

yes so your rock just have to know his durability or life if you prefer.

But in your example you have set the delay at the wrong place ^^

[steady briar]

either way, complexity can come later. im happy with a simple replicated explosion for now 😃

the whole animation thing is placeholder. ive been struggling with this for quite some time... it doesnt always occur to me to make a function that pretty much just switches whos running it

[drifting plank]

For the moment put your delay on the rock and replace it later by a timer function which loop 😉

[steady briar]

ok i need a break <_< got a headache from this. i can play a game all day no problem, but the text and the flat screen kills my brain

[drifting plank]

Ah ah I do c++ me Do the same 😛

[steady briar]

ya i will tinker with it. its a good template. thanks ppl who helped~

[spare lynx]

I basically built my client .exe now but how can I connect the client to the server?

[drifting plank]

You can create a shortcut with some option to put the ip of the server 😉

If you haven't a menu or a session system implemented

[spare lynx]

ye need the shortcut

[drifting plank]

You can also type command line to connect to the server

[spare lynx]

I am searching for the start parameters at the moment

[drifting plank]

https://wiki.unrealengine.com/How_To_Test_Dedicated_Server_Games_Via_Commandline

[spare lynx]

ty

[drifting plank]

Hum maybe not

Wait

It's for a UE4Editor exe you have a build

Do you have a dedicated or a hosted server ?

[spare lynx]

dedicated

[drifting plank]

<yourgame.exe> <ip address> -game

Logically

https://docs.unrealengine.com/en-us/Programming/Basics/CommandLineArguments#overview

[icy nacelle]

I'm still having problems replicating an item being equipped when the bot is spawned in the server - This does work in singleplayer.
I've made sure that everything is ticked to replicate.

[drifting plank]

the actor which have this begin play is a player actor or a server actor ?

AiParent hum what is this class ?

Is the ServerSpawnWeapon function called or not ? If not, check if you are the server or if the caller is an owning actor.

[icy nacelle]

Its the parent class of all my AI characters

It is being called yes

[drifting plank]

Ok so logically there are bots spawned on server and owned by an ai controller

[icy nacelle]

Yeah

These bots are already dropped in via the level editor

[drifting plank]

The weapon are spawned correctly ?

They just are not attached or something else ?

You maybe need to call attach on server and multicast that they are also attach on client ?

Hum logically, the parenting on server works on client too. What's the problem ?

[icy nacelle]

In singleplayer its spawned just fine

Ah, you think maybe it spawned at the location of the transform I inputted?

hmm nah its not that

[drifting plank]

I didn't understand the problem

[icy nacelle]

?

[drifting plank]

They are not spawned ? bad located ? anything else ?

[icy nacelle]

The problem is, when this runs, it doesnt spawn the actor in the world

Not about its location - It literally does not appear when I'm playing as a client

[drifting plank]

You have check if it appears on the server side?

[icy nacelle]

Yes, it does appear on the server side

Just not on the clients

[drifting plank]

you have said that the Weapon is set replicated so it's very strange

[icy nacelle]

Its marked as replicated

but its not actually replicating - this is the problem

[drifting plank]

Weapon is a variable or the actor is set to replicated ?

The actor needs to be set replicated
Not the variable of the class

[icy nacelle]

Yes, you can see it is because it has the two balls

The actor is also set as replicated

[drifting plank]

This variable doesn't need to be replicated. Only the server need to know the class reference

But it's strange that it appears on server and not on clients if the weapon actor is set to replicated ... 🤔

[icy nacelle]

Whats weird is if I put a print after the spawn and find out the current weapon display name, it'll be the weapon from that class

So its literally being set, its just not appearing on the server

[drifting plank]

So weapon need to be set to : not replicated (Just for initial spawn)
Equipped weapon can be replicated if you want that the client know him.
Check that your weapon blueprint (Not the variable in your aiParent is set to replicated

[icy nacelle]

hm?

Why would I set the weapon to not replicated? surely thats the opposite of what I need?

[drifting plank]

weapon is a variable of AIParent right ?

not your blueprint so you didn't need to replicates it

[icy nacelle]

Ah, you mean the weapon variable?

[drifting plank]

yep

i said that ^^

[icy nacelle]

Yeah, thats not replicated anymore

[drifting plank]

equippedWeapon variable, you can if you need 😉

but the problem is surely always here

😦

Why your weapon doesn't spawn on clients 🤔

[unborn nimbus]

Any idea what would cause a c++ rep notify to not get called on the client? I'm using them in a ton of different places in the project and they all work fine but this one just doesn't want to work.

[icy nacelle]

This print string always prints the weapon that I'm trying to equip

also AI is functioning as if it has that weapon equipped

[drifting plank]

@unborn nimbus Repnotify is not called automatically when the variable changes. You need to call OnRepYourFunction() manually when you change the variable.

Or you have maybe missed the DoRepLifetime ?

[unborn nimbus]

Since when? All the other rep notifies are called automatically

[drifting plank]

In blueprint yes

Never in c++

[unborn nimbus]

no, in c++

[drifting plank]

Never 😮

I see that on the official documentation and in the network compendium of Cedric

[unborn nimbus]

Would you mind linking? I'm looking at Cedric's compendium and I don't see it

[drifting plank]

Hum where have I see that ...

I'm sure that I need OnRep after a change. In my code it was the issue

[unborn nimbus]

I know you have to call it manually on the server but not on the clients

otherwise, that defeats the whole purpose of the rep notify

[drifting plank]

Oh you change the variable on the client 😮 ?

[unborn nimbus]

no

I change the variable on the server, I need the OnRep on the client

[drifting plank]

yeah

Oh so the OnRep is not called ok

Hum so check your replicates, doreplifetime

[icy nacelle]

barely changed anything and now I'm getting this error

[unborn nimbus]

Correct. I'm loading the engine again to check for sure but it works in editor but not once packaged. The other rep notifies work in the packaged version

[drifting plank]

Oh 😮

Strange

@icy nacelle weapon variable is maybe invalid because you change it to unreplicated ?

[icy nacelle]

no its not that

[drifting plank]

So always check if you have spawn something

yes I see this is a problem with the spawnActor function but I didn't understand what is the issue :/

Type that on google ?

[icy nacelle]

Ah, changing variables had screwed up something elsewhere

thats why I had the issue

[drifting plank]

Always the same problem with the spawn on clients :/ ?

[icy nacelle]

Yeah

doesnt spawn, but AI acts like it has a gun

ah fuck it - i'll try and do it on a repnotify

actually no that wont work

because if a player joins later, it wont run for him

[drifting plank]

That's very strange 😦

Yeah you can call Repnotify for the weapon ^^

But it doesn't change the weapon spawn :/

[icy nacelle]

Well this is bloody strange - I've got it to work

instead of casting it to server then multicasting, I just directly multicasted and it worked

Although thats stupid as it should have worked even if it was run on server whilst already running on server.

[unborn nimbus]

@drifting plank I just confirmed it is working correctly in editor.

[drifting plank]

You have multicast the spawn so It creates different instances of the weapon on each clients. 😉

But if you want to have the same actor linked to all clients* you need to spawn it on the server

It's strange that it doesn't work for you

@unborn nimbus So the build don't work :/

[unborn nimbus]

Correct

[drifting plank]

I didn't used many OnRep on my code for the moment. But all of them works on build...
i'm sorry to not help =/

Try to debug with visual studio attached ?

I didn't know if we can't do that with a server build

[unborn nimbus]

Yea I've done that. It's called on the server for sure

[drifting plank]

and on client ?

[unborn nimbus]

no the client doesn't receive the replication

[drifting plank]

wow 😦

maybe you have an old compilation ?

You just did'nt realize ?

[unborn nimbus]

I've packaged like 10 times in the past 24 hours haha

[drifting plank]

outch 😦

[unborn nimbus]

probably more haha

Packaging now

[drifting plank]

🤞

It's midnight here ! i hope you will find the solution !
Tomorrow is the playtest time ! 😃

8 bugs to solve before 😅

[winged badger]

@unborn nimbus by packaged version you mean shipping binaries?

[unborn nimbus]

No Development and DebugGame

[winged badger]

there is Debug info at least then

try entering log lognet veryverbose

into your console

and then read a massive amount of logs?

[unborn nimbus]

I'll see if it adds anything. It's about finished packaging

[winged badger]

i take it there is no chance your DebugGame and Development binaries were compiled before you added ReplicatedUsing specifier in the editor version?

[unborn nimbus]

you are correct

[winged badger]

and the offending actor, does it just not call OnRep or does it not replicate the variable at all?

[unborn nimbus]

Doesn't replicate

[winged badger]

is there a variable with the same name in one of the base classes?

there should be at least a compiler warning about hiding an inherited member if there is

[unborn nimbus]

No there isn't

[winged badger]

i'm out of ideas, sorry, hopefully the LogNet provides a clue

its really a lot of spam tho

[unborn nimbus]

Thanks for the ideas. I hope it does too haha

[winged badger]

oh, the usual?

deleted the Intermediate?

[unborn nimbus]

Yea it's worth a shot. If this doesn't add anything. I'll clear everything again and repackage

[winged badger]

90% of impossible errors are solved by deleting Intermediate

[unborn nimbus]

agreed haha

[graceful cave]

is there something specific that needs to be done to replicate player states to newly joining clients? not all replicated variables are being replicated and instead its showing their own

like showing your own name on the scoreboard for everyone who joined before you

this wasnt an issue with my last project and im pretty sure i did everything the same

[winged badger]

sounds like you are pulling the name locally from the client

and assigning it locally for everyone

that, or just have the wrong bindings / playerstate context

[graceful cave]

well other things like kills/deaths/total damage are shown properly because theyre updated by the server after the client joins

so they then receive the new one

[winged badger]

you are using PlayerStates?

[graceful cave]

yeah

[polar portal]

Okay, okay, so I changed the movement, it's better now. BUT! there's still a spawning and controlling problem.

This is my paddle controller: https://imgur.com/a/5Jw0JHk

My multiplayer game mode: https://imgur.com/a/vjtFQD8

[winged badger]

so you either overwrite the names when you join

[polar portal]

and the result...

https://imgur.com/a/6ewPcBT

[winged badger]

server doesn't check if your information is correct, it just replicates anything that changes, and name doesn't

or your binding for the textblock showing the name is wrong

[graceful cave]

right, and im trying to figure out how it worked in my last project even though i dont think anything was done differently

everything shows properly for people who joined after you

but i know its the variable because its used in more than one widget and its wrong in all of them except ones that have text sent by the server

like dying/killing

[winged badger]

well, hunt down anything that references the Name

check every setter

[graceful cave]

thats it

[winged badger]

what does that macro do?

[graceful cave]

displays a chat message

[winged badger]

well, i see one fluke in this

altho i am not sure it can cause quite the effect you described

you need SwitchHasAuthority > Remote on BeginPlay

or it will run on both client and server

and it will also pull and broadcast the name from servers GI

well, not even that

[graceful cave]

oh man i completely let that slip by

[winged badger]

since that will break the listen server host

[graceful cave]

yeah thats definitely it

its dedicated server

so no host

[winged badger]

ok, otherwise you'd need to call the InitPlayerState from the Controller or Pawn where you can filter exec with IsLocallyControlled / IsLocalController

[graceful cave]

yeah the client is just running begin play on everyone's state when he joins

didnt even realize i left that out there, every other actor has that lol

[winged badger]

oh

you still need to filter, even with dedicated

[winged badger]

because just the dedi not running BeginPlay won't cut it

[graceful cave]

that seems to work properly

[unborn nimbus]

@winged badger maybe I'm doing something wrong but adding lognet and veryverbose didn't seem to add anything to the log

[graceful cave]

everyone only runs it on their own

[winged badger]

its a console command log lognet veryverbose

[graceful cave]

i cant know for sure until i package and test again but this makes each client only print once

[winged badger]

the output should respond immediately

[unborn nimbus]

ah ok

now it's going

Should be able to search for my OnRep function yes?

[winged badger]

i don't remember how verbose LogNet entries look like off the top of my head

but certainly worth a shot

[unborn nimbus]

yea it doesn't exist in the log

[graceful cave]

ok yeah mine definitely works now, names go from default blank string to default name in the settings

over the course of a few seconds

[winged badger]

i think deleting Intermediate is by far less painful choice then sifting through LogNet btw

[unborn nimbus]

ctrl+f

[winged badger]

searching for a replicated variable by name in the same actor that replicates at the same time

should provide something close to the target

[unborn nimbus]

The variable and OnRep don't show up on the client

[winged badger]

it should be in the same bunch

[unborn nimbus]

Yea, I'm repackaging fresh

[glacial lotus]

Is a Hit Struct too much for being sent during replication in a 4 player cooperative shooter? using listen server

[glacial lotus]

ok, I workarounded that but now back to my recurring problem. How the hell does the Server custom event know which player has invoked it? Using the player controller?

[polar portal]

Could someone help me with my issue here please?

https://imgur.com/a/18sMdVM

Currently I'm running a dedicated server with 2 clients connecting, but both are outputting the server string, I can move each one individually but their movement isn't replicated to the other:

https://imgur.com/a/ttFM1G5

anyone?

[glacial lotus]

@polar portal Newbie, but I think the issue is because that is being executed in clients and the server "copies" of the players. I guess you want to encapsulate all the event into a Owning Client custom event and call that one from the input event

So Input Axis Move connected to the new custom event. And that custom event is a "Owning client" one with all the stuff that you had previously connected to Move

[polar portal]

https://imgur.com/a/j6D9fKw

Like this? (It doesn't work :/ )

[glacial lotus]

too compressed , I can not see the text

Anyway I would put the condition within the new custom event GODDAMIT, not there.

When a SERVER custom event is called from an owning client, does the Server knows automatically the player controller of the owning client or does that need to be passed as a variable somehow?

@polar portal the latest qustion is not for you, I'm just asking in general

[strong abyss]

Does anyone know how to get a steam avatar?

[worn nymph]

yes 2 options as far as i know. use advanced sessions plugin or do it yourself via c++. i have made a bp function that can get the avatar. i can show you the code later if you remind me as im afk right now

@strong abyss

[native axle]

@worn nymph Can u call get avatar from the clientside? I was using adv session and couldn't get it to work. Was going to try to replicate it from the server.

[worn nymph]

@native axle not sure i dont use the plugin. i did it myself with c++ and exposed it to BP and made my own BP nodes. yeah i do it client side after the player has authenticated with steam doesnt make any sense really for the server to be doing it

[native axle]

@worn nymph I think there was a problem with replicating one of the structs adv session used to ID players. Will shoot you a message about ur code later 😀

[worn nymph]

ok np i should be home at around 3:30pm GMT time

[tawny parcel]

What is the proper way to replicate construction script variables? The actor spawns just not with any exposed variables set properly.

[twin juniper]

@tawny parcel Mark your Vars with UPROPERTY(Replicated) or ReplicatedUsing=OnRep_Function.
If you want to expose the properties to the editor add the macro EditAnwyhere or VisibleAnywhere in your UPROPERTY().

Example,
UPROPERTY(Replicated, EditAnywhere, Category = "Player")
int MyVar;

[tawny parcel]

Sorry - blueprint coder here 😛

I know onrep functions but that would be an additonal call on the network, I'd rather it be in the initial actor replication

And all of those exposed variables are set to replicate

[twin juniper]

Oh I see now. So they are replicated, there just not initiallzing correctly? Try setting the variables defaults on BeginPlay function.

[tawny parcel]

Yea the actor itself spawns and is replicated. Can be hit and everything. But the expose on spawn variables dont take effect. Such as monster type / size / color ect

[twin juniper]

I see, make sure you have Switch Is Authoriy and set these vars on BeginPlay. Im not 100% why they wouldnt replicate on construction, I mainly work in C++ for the networking.

@tawny parcel yeah cant you set them as default vars or on beginplay if construct doesnt work?

[tawny parcel]

Yea very strange, I did a print string on all the exposed variables - the print shows them as all correct. So I just ran the construction script locally on begin play as well and it seems to be good

[twin juniper]

😃 nice!

[wintry ruin]

I'm facing a problem with my melee weapon where I want to check the overlap with enemy during the attack animation, but my weapon is never generating collision events. If I place the same static mesh on the ground it has collision and blocks my character, I cannot walk through it. The weapon is attached to a socket with "Create static Mesh"

I tried to add every possible bind event:

still its not generting any event when I play my animation or when I just walk near to a wall and my weapon collides with it

or character

[glacial lotus]

When a SERVER custom event is called from an owning client, does the Server knows automatically the player controller of the owning client or does that need to be passed as a variable somehow?

[bitter oriole]

The event will be called on the replicated instance of the class it was called upon on the client

If you call event DoStuff on your local PlayerController, then yeah, it will trigger DoStuff for the matching PC on the server

[glacial lotus]

@bitter oriole So if my player 3 triggers an input event ("shooting" let's say) and that event has a SERVERDoShooting custom event, when that SERVERDoShooting event is executed on the server does a "player controller" node match the original player 3 player controller?

[bitter oriole]

If you called SERVERDoShooting on the local PC, it will be executed on the server for the remote PC matching that player

[glacial lotus]

@bitter oriole Great thanks. That solves a doubt that I was dragging since I started with all the network stuff

[drifting plank]

Question I didn't find the answer : The net cull distance is based on the actor root location or the actor camera location ?

I've very strange behaviour with a unzoomed camera and I change the net cull distance to higher and higher value and the actors still doesn't appear when I have near them

Target arm length : 900 -> All is fine !

1200 -> It begins to be strange (Pawn appears when we are very near)

1500 -> Pawns are totally invisible but present

[twin juniper]

@drifting plank Did you maybe check

?

[drifting plank]

Oh I will check that

Where is it ?

[twin juniper]

Details > Render > Bounds Scale

On your mesh

Could also be camera near clipping setting.. maybe.

Anything close will be clipped, culled.

[drifting plank]

I have tried to change the near clip to some values. Nothing changed

[twin juniper]

Did adjusting Bounds Scale do anything for you?

[drifting plank]

Nothing too 😦

It's just a relevancy issue. I have unzoomed very high and my ground disappear too

[twin juniper]

So playing single player works ?

[drifting plank]

But changing the cull distance doesn't change anything. It's understandable

[twin juniper]

No culling when your just playing as Server?

[drifting plank]

Yep

[twin juniper]

Okay well atleast we know where to look! 😃 Im thinking I know what it is.

Sec have to find the check box!

[drifting plank]

Ok I need a good explanation about relevancy. I didn't find a good documentation about it

[twin juniper]

@drifting plank Theres this brief summary on Relevancy from the docs. https://docs.unrealengine.com/en-US/Gameplay/Networking/Actors/Relevancy

[drifting plank]

Yeah but it say nothing about origin of the relevancy

And why the camera has this behaviour 😦

[twin juniper]

Heres another breakdown on relvancy and replication, its also breif.
https://wiki.unrealengine.com/Network_Replication_Events_And_Relevance_Table

So the issue is, the clients will dissapear and reappear when you zoom in and out?

@drifting plank Maybe take a look through this as well, see if it could help you diagnose your issue. http://timhobsonue4.snappages.com/culling-visibilityculling.htm

If its a clipping / culling issue, it will be in here somwehere.

[drifting plank]

But it's only an issue in network

With a huge distance on single player all works fine

But thanks for the link 😉

i will try to implement manually IsNetRelevantFor

Ow just found the solution ... it was a old variable which override the net cull distance 😦

[twin juniper]

Ah, its always some odd checkbox or variable! Glad you got it solved!

for multiplayer game need I a server?

I want to make a survival multiplayer game with chat an at least 2 people to play together-is this a hard to make?

[drifting plank]

You need a hosted server or a dedicated server

[twin juniper]

I know from Microsoft there are free servers but I don't know they do work or not?

this is useful or not for multiplayer game?

@twin juniper try t2.micro . free for a year

[fluid adder]

anyone know why my OnPostLogin event isnt firing?

i have a print string right after it and its not printing

ok never mind i found my problem

[twin juniper]

can you send me a link to it @twin juniper

[fluid adder]

https://i.imgur.com/PzO98Dd.png

[twin juniper]

@twin juniper here's my pipeline for it. you just have to spin up the instance. it's free for a year if you do it right. make sure to get free tier server.

[fluid adder]

it seems even though it compiles properly it still has issues with removing a <controller> from a <playerController> array
https://i.imgur.com/ftDa9Wn.png

[twin juniper]

@twin juniper YOINK! Thank you sir...

haha

welcome

Going to using that as refrence for sure. Thank you!

@twin juniper this that you send from which site is-can you send me a link to it please??

i was just updating my ded server to 4.20 😃 getting some logging issues but ram appears okay serverside

Noob lmk if you have any questions or concerns along the way, i'm usually here 24/7, just ping me

I just did my first local multiplayer test today, went very well. Do I have to build from source to have a dedicated server in the end? Binary wont cut it?

pic of my dedicated server remote dekstop. fun stuff

yep i source build to have development editor / development server builds

then you use project launcher to build out the Server in stagedbuilds

after that, the ram is optimzed

KK so to test a dedicated server I have to build from srouce?

yes, as far as i am aware - haven't tried it without.

you can possibly try to avoid source building if you use the project launcher

Yeah thats what most of what I read pointed too, is that binary wont cut it. Thank you ! 😃

in windows -> project launcher. look at allars post on dedicated servers on his blog

Yah I have, hes great.

dedicated servers unreal allar

yeah

I basically just suck down every resource I can about UE4.

Allar, Orfeaus, Tom Looman , Ray wanderliech, Rama, these guys have some really helpful content.

I plan on making some tuts at some point too. Just to give back to the community.

yeah the udemy cpp ones that ben tristem did is pretty good

guy used to be a fireman lol. 🚒

smart cookie

There are alot of "Gotchas" in the engine, a simple hidden checkbox can send you in a demotivating spiral because you had no idea of its existence! 😃

@twin juniper I wrote you in DM

Yah I plan on buying his course next, I bought the Tom Looman Multiplayer, cant recommend it enough!

@twin juniper just tested it on 4.20. works good 😃

only problem is now i have minor net lag in my ded server. gotta literally go thru and optimize all RPCs

less reliable calls / try to reduce all replicated vars

i can safely say though that t2.micro is a great option, especially if you are based in the u.s. since you can easily find a location close to you

And get rid of all visual fxs too, Ded server doesnt care about those things! :0

yep its basically a build of the game in server mode, and you connect using exec console command open x.x.x.x - thats what i do

I was wondering about horizontal scaling, since EC2 all have instances, is this handled all through amazon or node.js ? I have a ways before I get to these questions really, but I have so many! 😃

lol

very direct, no custom RPCs like in gamesparks

oh, i only have one test instance

and direct ip connection, i dont even use the API to get IP

not sure on multiple instances or scaling

you might need to look into if its still free as well

Oh Im sure it wont be! 😃

i know its free for one year if you're ram use is low

Yah I set up EC2 and S3 Buckets all the time 😃 I love amazon!

one thing i can say that helpe dme is this - might help you too if you get to that point

my ram was thru the roof for a while

when i used project launcher, it optimized it a lot

i went from 1 gb ram to 150 MB

I see good to know wow.

yeah

so follow allar's post on ded servers to the letter.

he goes thru the project launcher in there

do NOT use vs 2017 -> development server -> take exe and put on aws

build it out once in vs 2017 for a ded server local binary, and let the project launcher do the optim for you

then take it from staged builds

Yah so far, Im using this guys method i found on the forum. Perfect for me to test locally atm.

Build project, litterally type in console "Open MapName?listen"

The client just types in Open LocalIP

https://forums.unrealengine.com/development-discussion/blueprint-visual-scripting/13218-network-testing-across-multiple-computers

Fastest way I have found without doing any batch files or making the clients do anything crazy. Just type open and my ip! 😃

they just open the cooked build and so do I 😃 either one of us can act as listen server

Ofcourse doesnt help me testing ded tho...so thatll come later, im wayyy too lazy to do all that stuff atm lol.

i use a static IP that amazon provides once the instance is spun up, it's always the same for me

but thats good for local testing

cool

😃

if you can get it working in 2x pie windows you're pretty much good.. as far as testing goes

that worked for me more or less

then of course i had to get steam working

Yah I just kept searching a way to test locally until I found the fastest simple way, lol

so i had to test on two machines for that

Had to go through tons of posts about making batch files or doing this or that, ehh.. nah. lol Glad I found this post!

Part of the reason I want to make tuts, just encompass all this information in one place.

i literally only use batch files for steam builds, and drm wrapping

Yah there nice when you wanna get to real testing.

i need to make a batch file for UAT / unreal building too

Batch files I mean.

i havent looked into batch uat yet or any kinda building templates

would save me a ton of tiem tho

Yah it all addds up!

What type of game you working on?

a 6dof game

its on steam now

pre early access

degrees of freedom?

Or..

yeah like descent

from the 90s

or descent underground, or forsaken, or overload

Ohh cool, id love to check it out, whats the name?

ill dm u holdon

[twin juniper]

okay
thank you(редактирано)
but I want to make my game with Blueprint not C++ is this problem for the server? @twin juniper

[twin juniper]

@twin juniper you can make the game in BP and still build out the server using development server option in vs 2017. once you do that, use the project launcher like allar says in his dedicated server guide on the blog. it still works. just make sure to use execute console command open x.x.x.x from the client, and the server must have a static IP. that's how i do it. easiest if you always know the IP And if you have a dediacted instance it automatically generates it. stays the same. just follow the guide I DMed you and it should work. it might take you a few weeks to figure everything out. good luck to you.

thank you

if I need help can you help me?

yep but only when i am on here. i am usually developing my game and need to focus on that. if i don't answer right away i'll get back to you in a few days maybe, unless you ask on here or on the unreal answerhub.

[twin juniper]

okay

Can you show me your game in DM when we talk??

[strong abyss]

@worn nymph Sorry I was sleeping. I would love to see how you did it if that is alright. 😛

[glacial lotus]

Offtopic: In english if I want to say that the internet speed is slow as the ones from 20 years ago, Is this right "20-years-ago internet speed"? "20-years-old"?

[twin juniper]

I'm using a timeline/curve to change the values of acceleration and ground friction over time. This desyncs very easily and at relatively low latencies, and the client gets constantly corrected because the timeline starts later in the server. What do?

@glacial lotus "20 year old" probably works better

[glacial lotus]

@twin juniper Thanks

[worn nymph]

@native axle @strong abyss @thin stratus
sorry was busy here you go.
cedric tagged you because i used a small portion of your code as mentioned in the pastebin comments

https://pastebin.com/zkCXLeHS

[strong abyss]

@worn nymph Thank you! That is very clean and easy to read. You're awesome!

[potent raven]

Anyone else having issues connecting to dedicated server on 4.20? https://answers.unrealengine.com/questions/810378/420-dedicated-server-login-failure.html

[halcyon cradle]

hello how can i spawn an object in the server and avoid its replication?

[halcyon cradle]

i use a custom event with no replication and the spawned actor is also not using replication

[tawny parcel]

I'm having issues getting the correct branch statement for showing/hiding nameplates in a multiplayer settings. I use a collision sphere overlap event to generate the show/hide on the nameplate - this part works fine. However all collision sphere's in game are triggering the show/hide and not just the owning players sphere. This is only a locally run event and not replicated however

[twin juniper]

@tawny parcel I would usually check if owner is = for such things

[tawny parcel]

Yeap, trying that but for some reason it is still triggering. My example would be three players in the game. One is outside range of the other two for the nameplate to not show. However as the other two get in range of each other the nameplates hide/show for everyone, not just those two players.

[tawny parcel]

I even have the sphere as only owner see, which i guess is purely a visibility statement?

[ripe stratus]

Ok - been a bit over a week since my last question and I've been continously banging my head on yet another replication question.

Chess game - game pieces created by server. So therefore they are "owned" by the server. Playercontrollers interact with them and can select them, move them.

In their Tick methods they slowly Lerp their way to to their destination. If they collide with another piece ( PieceMesh->OnComponentHit.AddDynamic(this, &AGamePiece_Base::OnCompHit); ) they call my own function SendEventToPlayer(EPieceEventType::VE_Killed);

void AGamePiece_Base::SendEventToPlayer(EPieceEventType EventType)
{
ASC_PlayerController* PlayerController = Cast<ASC_PlayerController>(UGameplayStatics::GetPlayerController(GetWorld(), 0));
PlayerController->GamePieceEvent(this, EventType, GetActorLocation());
}

on my player controller
UFUNCTION(BlueprintImplementableEvent)
void GamePieceEvent(AGamePiece_Base* GamePiece, EPieceEventType EventType, FVector Location);

This event only happens on server and I've tried every which way I can think of to make it transfer ownership to owning playercontroler on client

[winged badger]

there is no networking code there

at all

you just sent the event to your PC blueprint

on server

[ripe stratus]

My question is at that point is what is the best way to send the message to the client - I'd happily do it in code or blueprint if I could figure out which one would get it to work. I'll get a screenshot of the blueprint in a second

( I hit enter before intended - was still trying to type )

[winged badger]

// ASC_PlayerController.h
UFUNCTION(Client, Reliable)
void GamePieceEvent(AGamePiece_Base* sender, EpieceEventType eventType);

// ASC_PlayerController.cpp
void ASC_PlayerController::GamePieceEvent_Implementation(AGamePiece_Base* sender, EpieceEventType eventType)
{
    ...
}

also, if you are using listen server

that SendEventToPlayer function will only send it to itself

[ripe stratus]

I've tried with listen server and with dedicated server

I'll give your suggestion a shot - I apparently am in a noncompilable state right now - can't get the blueprint screenshot at this moment

[winged badger]

it won't work as intended with dedicated either

but at least one client would get all the notifications

[ripe stratus]

hah that is true so far

[winged badger]

i strongly suggest looking at pinned resources on this channel and reading thru Cedric's compendium first

[ripe stratus]

I've been looking it over but feel like I must be misunderstanding some vital piece. I have made it past more than a few hurdles with that priceless resource.

[winged badger]

i'd never go for collisions to signify "kills" in chess either

[ripe stratus]

I'll look it over again. Been looking at that and Tom Loomans udemy course.

[winged badger]

you have A-H, 1-8

and pieces moving is just an eye candy, for the game to function they might as well teleport

the collision event will also fire on both client and server

[ripe stratus]

It isn't exactly a standard style of chess. There is no concept of turns and all pieces could be moving at once. Perhaps not the best idea to go with on the first networked game

there is a large amount of logic that I was dropping out here - I understand that for a standard game of chess your comment there is completely valid

not all collisions result in a death - some result in a deflection. All the game logic works out fine - I'm just trying to get the nice pretty fx and sounds to work at this point

[winged badger]

you can stick your sound and fx asset references into your piece actors themselves

have them play when they detect a collision

[tawny parcel]

This is the issue - far left player is out of range yet still receiving hide/show when other players get close to each other. I have a sphere collision executing hide/show of the nameplate.

[winged badger]

it will work without network

that would be UMG displayed on some collision trigger @tawny parcel ?

[ripe stratus]

thank you Zio - I will give that a shot later tonight - sadly I don't have time to give it a spin just now.

[tawny parcel]

Yes, yet for some reason I can't turn off other players sphere collision or get the right branch to only execute on your own collision's

[winged badger]

for every player (and +1 for dedicated server) there is an instance of your Character

each has one

each reacts to collisions

and each executes the code to show the widget

you need to filter it with IsLocallyControlled (for Pawn) or IsLocalController (for PC reference)

if you are making your trigger call whatever is displaying the widget, and are using OnBeginOverlap, you will have to Cast OtherActor reference to Pawn first

or to Character, or your specific Character class doesn't matter, as long as its derived from APawn

[tawny parcel]

I have this right now, I see the islocallycontrolled node trying that out !

@winged badger worked like a charm man - thanks a ton. I was trying to find that type of node forever!

Result:

[winged badger]

that is inside your ThirdPersonCharacter blueprint?

if so you can lose the GetOwner and the Cast node, it will work just as well without them

[tawny parcel]

Tried - it wont connect!

[winged badger]

you don't need to connect anything into the IsLocallyControlled

it will default to self

and that self is same as the Component's Owner

just the exec into the Branch

again, only if that is inside your ThirdPersonCharacter BP

[tawny parcel]

@winged badger Sweet deal, all setup!

[autumn dawn]

Anyone recommend a video for learning how to add multiplayer?

[twin juniper]

@autumn dawn If you are using C++ I would buy Tom Loomans course for Mutliplayer on Udemy. Very informative. You should have a bit of experience using C++ and UE4 tho.

@autumn dawn If you are looking for something free, he also has free resources on his site. http://www.tomlooman.com/survival-sample-game-for-ue4/

It is multiplayer.

[autumn dawn]

How about using Blueprints?

[crude lion]

https://www.youtube.com/playlist?list=PLZlv_N0_O1gYqSlbGQVKsRg6fpxWndZqZ
https://www.youtube.com/watch?v=uCjXJD9AhqY

[rose egret]

hi. can someone send fake or corrupt UDP packets to UE4 dedicated server? I heard it crashes the server ! does UE4 authenticate packets?

[wet oriole]

Hello guys, I've a problem with creating onlinesessions using steam, when i use the default 480 app id i can create a session but when i use my app id i can't create a session and i've this error : Warning: Async task 'FOnlineAsyncTaskSteamCreateLobby bWasSuccessful: 0 LobbyId: 0 LobbyType: 2 Result: '15' k_EResultAccessDenied (access denied)' failed in 0.405532 seconds

I didn't add any exe to steam partner page and i'm running as standalone version not packaged project

[charred crane]

I've been digging trying to find a way for my client to destroy session so he can join a new lobby but I can't figure anything out. On my main menu begin play I call Destroy Session but I never get a successful destruction. I did manage to get the player to leave a game in progress with a successful DestroySession call, but he's still unable to re-find and join that session. I've searched back through this chat to december of last year and tried all of it. Can anyone help?

[charred crane]

I didn't see that it was fixed in the 4.20 notes either 😦

I also removed the destroy session call when leaving the game and still can't find any sessions.

[arctic willow]

Why does the steam overlay pop up when testing within the editor and not show up when i start in shipped version? I use the Steam sdk version 142 and think that i followed the Unreal Documention correctly

[mild geyser]

I'm trying to call server function with uobject parameter but it's never called. Instead, I get this:
Warning: UPackageMapClient::InternalLoadObject: Unable to resolve default guid from client

Has anyone experienced the same? If so, what seems to be the issue here?

[native axle]

@charred crane There maybe a better way but what I found was the easiest way for the client to disconnect is to move to another map. So I have a MainMenuMap -> LobbyMap -> GameMap. And if the client ever wants to disconnect, just open the menu map. Inside the menu map GameMode you can call destroy session.

[winged badger]

@mild geyser i'm gussing the class the function is a member of is not set to replicate, or you have an actor the client spawned itself, and there is no corresponding version on the server

@wet oriole iirc steam lobby system will check for game ownership before letting you join

so the steam client account your machine is running must have the game in the library

[keen halo]

What would be a good way of setting up character sounds in multiplayer?
Like for example the sound of casting a spell.
Having a audio component would be one way and multicast ”spawn sound on location” would be another.
Any pro / cons or other suggestions?

[twin juniper]

@keen halo I would use Audio Component for ambient sounds that need to loop. Like a camp fire crackling. You can also just use Anim Notifys which I found to be super easy to implement. Probally the best way to get sounds implemented fast.

Another method is to add a SoundBase* SoundEffect; to your .H file. Then in the editor you are able to choose the SoundEffect. Ofcourse you have to code where to use it, like when the player shoots, or casts a fireball.

I would personally avoid having AudioComp on your player, weapons, for multiplayer, every Component adds more overhead.

[keen halo]

@twin juniper Thanks! Yeah I would not consider an audio component for sounds that only play occasionally.
But since sounds that are used when doing attacks play very frequently I thought it might be worth it.
But I might be wrong 😃

[twin juniper]

Try Anim Notifys, very very intuitve. Especially for stuff like Foot Steps or mutliple sound FX in a combo. Like a charging sound then an actual fireball sound could happen right in your animation, so you can time it really well visually. Makes having multiple sounds for a single action easy to implement.

[keen halo]

@twin juniper I will try that! Thanks!

@twin juniper Just one concern... by using anim notify to play sounds.
Can I have different sounds playing with the same animation? That is if I am reusing the same animation for multiple spells.

[twin juniper]

@keen halo You can call an event (function), instead of a sound, and then choose what sound to play in the function instead.

https://docs.unrealengine.com/en-us/Engine/Animation/Sequences/Notifies

[finite bison]

where do i have to look to get the server or client name (as shown in the pie windows when running multiple pie's)?

[compact gulch]

is FloatingPawnMovement suitable for network game?

does anyone know if they're usable?

it seems that this movement component will jitter a lot

[slim holly]

iirc floating pawn movement does not have networking

^ not a multiplayer issue, and you probably ran out of ram

yea filling 16GB is no problem with big projects

[crude lion]

Hey TheCruSheR, please don't post your problem in so many threads here on this discord. Find the one that relates to your issue and use that

I don't mind, but other people might consider it spam 😉

https://www.twitch.tv/videos/122529021?t=18m00s
https://conanexiles.gamepedia.com/Modding
Maybe you can find what you need here

Sorry I haven't had experience with the Conan Dev Kit, but I'm not sure if you can just look at the files that THEY made. I think it's only for creating new stuff.
What is your actual goal? Do you want to make a game that is like Conan?

I would recommend that you look at tutorials, and not a finished AAA project.

Tutorials will give you a better way of understanding the engine.
If you look at their code you will just see a lot of things that are too complicated and that you don't need at all.

Try something like this: https://www.youtube.com/playlist?list=PLgyA4MNDbNLlXTBpZAx0GlWCzQbIQ9EaA

We should also stop posting here, because this is the "multiplayer" thread

I don't know much about Conan Exiles Mod Kit, but in my experience it's easier to start making a veeeeery basic game first to learn your way around the Engine.
Try making a very simple Pong or Asteroid game, then package that game and try to run it.
You will learn so much. I tried making a multiplayer shooter game as my first project, and after 2 weeks of struggling, I found out that I had 1001 things I still needed to learn.

I get that you want to make an awesome game, but you need to learn how to make a simple game first if you want to not have simple issues while you are developing 😛

Ok, you can DM me the link and I will give you feedback! 😃

[hybrid cypress]

Ahoy! I'm trying to update my capsule size for different sized player races on login, and am using SetRelativeLocation on the player mesh to adjust it to fit in the newly sized capsule. This is working locally but when viewing another client the mesh offset is not being applied. Turning off Network Smoothing Mode in my CharacterMovement component fixes this and properly replicated the mesh on other clients, however this makes client movement way too choppy. Does anyone have any ideas on achieving this without disabling network smoothing mode?

[wet oriole]

@winged badger Of course the ownership is important and I've it

[severe berry]

Movement replication replicates the movement to everyone except itself.

It used to be different, is this normal?

[charred crane]

@native axle that’s exactly what I do. I send them back to the main menu with OpenLevel and then when they get to it, on the level bps begin play I call destroy session but it says there are no sessions. That client is never able to find/rejoin the existing session. I haven’t tried it in game mode but I can’t see why that would make a difference.

[unique thunder]

If I have these two scenarios:

1. Event Beginplay > Spawn Actor
2. Event Beginplay > Switch has authority > Spawn Actor

Will the actor spawn in both cases but in case #2, it just prevents cheating? Or does case #2 somehow tell the server to spawn it whereas in #1 it doesn't spawn (on the server, client-side only) because it didn't have the switch?

[thin stratus]

The Switch only filters the call

It also depends on how teh Actor is setup

[winged badger]

scenario 1 will spawn actor on both client and server

the one that client spawned will not match the server actor's NetGUID

[unique thunder]

So as long as the action is replicated, it'll spawn regardless but the switch ensures the client isn't the one doing it

[winged badger]

so replication and RPCs will not be possible

[thin stratus]

1.1. (Actor non-replicated) - Actor Spawns on Everyone
1.2. (Actor replicated) - Actor Spawns on Everyone and a second Copy gets created from the Replication

2.1. (Actor non-replicated) - Actor only spawns on Server
2.2. (Actor replicated) - Actor spawns for everyone

And well, non-replicated doesn't allow RPCs etc. as Zlo says

If you don't use the Switch and the Actor is replicated, you'll end up with 2 Actors on the Clients

The Replicated one, connected to the one the Server spawned

And a Client one

So you want to always only spawn Replicated Actors on the Server

[winged badger]

the important thing to understand, that aside from a replicated Actor having a matching NetGUID on client and server (which allows server to "overwrite" client Actors variables, and for RPCs to be sent)

the server's and client's versions of the Actor are independent

each will fire its own BeginPlay, its own Tick, its own OnBegin/EndOverlap

[unique thunder]

So if the server spawns it on authority, I get one spawn but on each client including mine which is what i want

[thin stratus]

If you spawn a Replicated Actor on the Server, you end up with a copy of it on the Server and each Client, while these "copies" are connected via the NetGUID (allowing RPCs etc.).

The SwitchHasAuthority is really just limiting the call

Your BeginPlay calls on Clients and Server (IF the Actor exists on everyone)

So you need to filter the clients

They shouldn't spawn the Actor themselves

[winged badger]

alternate way of filtering (which comes to play when you only want something done on a local machine, like show a widget when a player enters overlap) is to filter the action by IsLocallyControlled (from Pawn/PlayerCharacter reference) or IsLocalController (from a PlayerController ref)

[severe berry]

https://answers.unrealengine.com/questions/810707/replicationmovement-bug-ue-420.html

[thin stratus]

Mark the Cube Component as Replicating

[severe berry]

I tried, it works but it's very bad, it jerks

[thin stratus]

Well yeah, you aren't doin any form of Interpolation etc.

All that UE4 does for you when you use something else than a character is setting the location

Server says: "Here is new location." And Client applies it

Even if that's 10 minutes ago and you suddenly teleport to the new location

[severe berry]

yes I know that

in 4.18.3 everything worked fine, with no cube component replication enabled

[thin stratus]

Well it works if you replicate the component

The rest is up to you to implement

[severe berry]

and here at 4.20 it just stopped replicating on the client who owns the pawn

[thin stratus]

But you just said it works if you mark it as ReplicateComponent

And I'm kinda sure that it always required that, even pre 4.20

[severe berry]

https://youtu.be/sOHCI-NYRno

[unique thunder]

any of you guys using 4.18+? I can't get number of players to be 2 or higher whilst seeing all of my windows at the same time, they overlap in the center. And because I'm doing VR, I don't have my cursor, it takes a while to tab in and out to align them and their positions reset after each play

[severe berry]

@thin stratus no, it was not required before

[elder crypt]

Does anyone know of any multiplayer scoreboard tutorial?

One kind of like CSGO, Overwatch, and all that?

Thanks!

[severe berry]

@elder crypt https://www.google.com.ua/search?q=ue4+scoreboard&rlz=1C1SQJL_ruUA779UA779&oq=ue4+score&aqs=chrome.1.69i57j0l5.3543j0j7&sourceid=chrome&ie=UTF-8

[elder crypt]

I've google searched that but most aren't for multiplayer or aren't updated properly :P

[wide parcel]

Do you want a step-by-step walkthrough or just a general idea? Cause I can do the latter. 😛

[elder crypt]

A general idea would be good, yeah :) @wide parcel

[wide parcel]

So it depends on whether you're interested in team scores or indivduals. Team Scores can be kept in GameState and just queried anytime. For individual players you're going to use a thing called PlayerState to keep track of their scores. When the level ends look through all your ACharacter classes and check their player state and pipe it through UMG or slate depending on your preference.

And actually GameState has a member PlayerArray which holds all PlayerState

*s

So you would just loop through PlayerArray for individual scores.

[elder crypt]

Okay :) I sorta want a tab menu that constantly updates all of the players' scores. What I've done is have the scores inside of the playerstate

How would I show all the player's scores on a UMG?

That's kinda where I'm stuck on

[wide parcel]

Are you using blueprints or c++?

[elder crypt]

blueprints

[wide parcel]

Hm alright, lemme think for a sec.

[elder crypt]

Okay :)

[wide parcel]

I think you would just cast your character reference to a PlayerState: CastToPlayerState->Get Score, send it to the server and have the server collect all the scores and names, send that data back to the client and have bindings in the UI for that data.

And for the constant effect have it on eventtick (both the client and server) with maybe a small delay so you're not going crazy with all the back and forth.

[elder crypt]

Where should I store all of the scores?

Which blueprint should I store it in, rather*

[wide parcel]

Really up to you honestly as long as you know it's accessible during the match. Could put it in the level blueprint.

[elder crypt]

Alright :) I can get it so the server can see all the scores for each player

But the other clients can't

[wide parcel]

Well half the battle. I've not done multiplayer code before so I'm shooting blind here. 😛 You've collected all the data on the server and it looks good. Is anything showing up on the UI?

[elder crypt]

Yeah 😂 The clients can only see their own score

[sharp pagoda]

A trap store scores In the player state

[elder crypt]

I'm doing that :)

[wide parcel]

Sounds like something isn't working in the UI EventGraph.

[sharp pagoda]

The player state is replicated to all clients, so if you setup your netcode correctly it will work

[wide parcel]

Oh hey, that would make life easier. ^

[sharp pagoda]

Lane never ever do what you just said

The level bp is literally the last place to put it

[wide parcel]

I was just thinking it was no good. You'd probably want it to persist after. 😛

[elder crypt]

@sharp pagoda The score variable is replicating between the players (inside the playerstate)

I just don't really know how to gather all of the scores and list them on a UMG

[sharp pagoda]

Iterate through the player states and read the values of the scores?

[wide parcel]

ForEach loop inside the UI blueprint. Make a function that draws a row, and yeah just grab the scores out of PlayerState.

[elder crypt]

it's not really letting me do that

Since I created my own playerstate blueprint

[sharp pagoda]

Cast it

Do you have an understanding of oop?

[elder crypt]

I don't know what that stands for :(

[sharp pagoda]

Object oriented programming. UE is impossible to use without having a good understanding of it

You should reaf up on the subject before you go any further

[elder crypt]

Okay

Thank you :)

[hybrid cypress]

Anyone else ever have an issue with adjusting capsule half-height and then trying to set relative location on the mesh not replicating for multiplayer? Clients see themselves fine, but see other players' meshes not correctly adjusted within their capsules. Turning off network smoothing in the movement mode fixes it but then makes movement sucky. 😦

[winged badger]

then push it another way

if you're adjusting capsule at runtime

you can put a FTransform CapsuleOffset variable

replicate it

and then have the clients locally adjust theirs OnRep

but why are you adjusting it at runtime? can you switch race mid-play?

because if one client knows how to adjust the capsule, everyone does

@hybrid cypress

[tranquil flint]

Ello ello! Does anyone know how long it might take to set up a very simple multiplayer movement + chat session? Like a blank default area, with only two people playing(hosted on one machine), with simply the ability to see eachother move around and employs the most basic of chat messages. I'd take two answers if needed, based on:

1. How long to set up for you or an experienced-ish Unreal-er-maker-doer-crafter.
2. A newcomer, perhaps via some tutorial(s) (you can use the video-length of the tutorials total, here).

[severe widget]

1. < 1hr
2. ??? (depends massively on the person)

[hybrid cypress]

Thanks for the idea Zlo, I'll try that! Well I have some illusions and animal form abilities that should really have unique capsule sizes, apart from those right now I'm simply trying to initialize the capsule sizes based on race when players log in.

[tranquil flint]

Thaank youuuu @severe widget the < 1hr is massively useful to know. I'll just round up to 6 hr then xP but I won't be surprised by 10+!

[toxic seal]

Is it possible to create and join LAN session with the running steam?

[twin juniper]

anyone know why the log in my dedicated server is empty? everything works (clients can connect), i just get no log. i enabled -log in the dedicated server binary shortcut.

[thin stratus]

Hm, Shipping or Dev?

[twin juniper]

sorry for delay - i am using shipping. i am using a shipping build, and i built out the dedicated server using the unreal project launcher (as how allar stated in his dedicated server blog)

these are my settings

get a decent sized ram footprint too, everything works as in 4.19.2R (ram footprint is similar in this build too, maybe a bit less with their 4.20 optimizations) i just get no log :X

[thin stratus]

I think Shipping doesn't produce any sort of log

Dev would give you one

[rose egret]

how to I connect to dedicated server with specified port
this one dosen't work
UE4Editor.exe "C:\Unreal Projects\TPBP\TPBP.uproject" "127.0.0.1:3434" -game -log

I also tried adding -port=3434

the server is listening on 3434

[glacial lotus]

When I spawn an actor from the server it should be spawned in all the clients too and also with the same transform, right? Because it's appearing at random places...

my actors are not characters, just in case

https://imgur.com/a/hUbKVy2

The left picture is the listen server, the other 2 clients 1 and 2. I noticed that the listen server has correct locations, since the rewards(crates) appear where the enemies died (the spheres). The clients have incorrect locations for the rewards however they are consistent. If you take a look you can see the rewards have been spawned in the same positions (incorrect, but consistent between remote clients)

well, turns out the locations in the clients are not consistant. I just got a few impressive coincidences... I should play lotery today 😃

[icy nacelle]

I've got a quite large problem here that I cannot figure out.
(This is all on a dedicated server with two clients)
When client 1 shoots client 2, the player controllers inputted into the functions (circled) come out as the same player controller.
When client 2 shoots client 1, the player controllers inputted into the functions are different (as they should be)

Any idea why this is happening? This is definitely running on a dedicated server.

[unique thunder]

@icy nacelle Are you testing in the editor or packaged build? I could be wrong but running with 2 players locally only gives you one client and one server, not two clients. That might be why you see those results.

Anyone know why this causes me to hear the sound effect (inside the function) play twice?

Is it because I have server and client open at the same time in preview?

[icy nacelle]

I am playing in editor, but I dont think its this problem as I'm grabbing multiple controllers

And yeah as for your problem, it probably is.

[wispy silo]

anyone here familiar with Advanced Sessions? I am trying to create a session and each time it gets executed it first fails then succeeds

and im not sure why it does both rather than one or the other

actually, it isn't the plugin. The vanilla node Create Session does it too

the node is Latent so i guess this is intentional?

nvm im dumb, found a bug on my end

[winged badger]

@icy nacelle what do you suppose GetPlayerController[0] does on dedicated server?

[chrome bay]

Anybody else run into the issue with listen servers not being found through Steam in 4.20?

Code worked prior to 4.20, doesn't anymore. I know they added Steam Auth, trying to work out what's actually changed.

[icy nacelle]

I'm trying to get the controller of the player - I know that the Event AnyDamage runs on the server but I figured this will get the controller anyway.

[winged badger]

yes, and it will always get the same controller

dedicated server won't reshuffle its list of playercontrollers based on your context

[icy nacelle]

I see

So what do you recommend I do?

[winged badger]

use GetController instead

i assume that is inside the PlayerCharacter

with current solution the player that logged in first would be the victim every single time that runs

no matter who shot whom

[icy nacelle]

Yeah

So essentially I shouldnt use get controller for stuff like this?

[winged badger]

GetPlayerController[0] gets the local controller, except on dedicated server - where there is none

GetController gets the Controller possessing the Pawn

[icy nacelle]

ahhh

[chrome bay]

Dedicated Server's have Player Controllers, just not one for themselves (since there's no 'local' player)

Just the PC's of the clients

[icy nacelle]

So when doing anything on a server event that requires getting the controller, I should use 'getController' and not 'getPlayerController'?

yeah @chrome bay that much is obvious enough 😛

[winged badger]

GetController requires a Pawn reference

from inside your ThirdPersonCharacterBP that should be "self"

[icy nacelle]

I see

Perfect, that has solved my problems.

Thank you Zlo ❤

[winged badger]

@chrome bay what are you using to connect?

[chrome bay]

How you mean?

[winged badger]

the built in engine code, or some plugin?

[chrome bay]

Engine OSS

C++ though, not BP

[winged badger]

is your server on the same machine as the client?

and do both steam clients own the game?

[chrome bay]

It's a listen server in this case

In 4.19/below - I could use another machine with another steam account and find that session

but now, nothing shows up

Seems the session is created properly though

[winged badger]

but both machines have the game in library?

both steam accounts, that is

[chrome bay]

yeah

[winged badger]

no idea then, i'm still at 4.18

[chrome bay]

they're both running the game, one is searching in-game at the time

They must have changed something for 4.20

Gonna dig through shootergame to see if anything has changed in regards to creating/finding a session but doubt it'll have been updated properly if that is the case

[winged badger]

maybe check advanced sessions if 4.20 version is already out as well

not a lot of code to go through there

[chrome bay]

I'll have a look, someone else was having the same issue in both Adv Sessions and default OSS. No replies to their post yet though 😦

Sigh

Multiplayer

the joys

[winged badger]

i am waiting for UWorks to catch up to 4,20 before upgrade

[chrome bay]

Have they finished their OSS replacement yet? Trouble I've got it that plugin is great if you're only shipping to steam

If you're multiplatform it's a bit of a pain

[winged badger]

when i was first wiring it up

i had troubles with NAT punchtrhouugh

so i wired 2 OSS in it

just needed to change few lines in DefaultEngine.ini to swap

[chrome bay]

yeah

I grabbed it when it came out because I was so sick of the native OSS having so many issues and being old.

But without all the code being behind the OSS wrapper it means I've got to do all the online stuff twice over for the other platforms

[severe berry]

https://answers.unrealengine.com/questions/810707/replicationmovement-bug-ue-420.html

[winged badger]

Vlad did alot of improvements, but i haven't kept up to date

[glacial lotus]

I need an example of how to span an actor (not character) in the same location for all the clients

[winged badger]

if you spawn it on server and its replicated, and relevant it should just work

[deft plaza]

When I spawn an actor from the client replicated to the server it crashes my game, anyone experience that? But it works fine when I spawn on the dedicated server

[chrome bay]

Aha. This looks interesting.

+Components=OnlineSubsystemSteam.SteamAuthComponentModuleInterface```

[winged badger]

you can't repllicate anything from client to server

[glacial lotus]

@winged badger Hmm, I'm going to delete all the extra stuff I have and try just the spawning

[deft plaza]

then do i have to do something like server->multicast?

[winged badger]

you can send a ServerRPC which spawns a replicated actor

if the object you are sending the RPC from has the PlayerController as the NetOwner

[deft plaza]

I think thats what I am doing, the client is calling a server rcp to spawn an actor

[winged badger]

there are also likely LogSpawn entries in your OutputLog

and if you only think that's what you're doing, paste the code

[winged badger]

and the crash report/log?

[glacial lotus]

Found my issue! the spawned actor has physics enabled and that seems to be a problem. If I disable the physics it works but the actor is floating in the air... I just need to make it fall... somehow

[winged badger]

popular methods are linetrace in 0,0,-1 direction until you hit the floot

or ProjectPointToNavigation

you might have to offset the location by half Extent.Z in positive direction after, too

[deft plaza]

the log is empty

[winged badger]

if you crashed there is a log in Saved/Logs

[deft plaza]

oh wow theres different logs, unreal kept opening the console logs. I'm reading through it now. Thanks for the help.

[marsh gate]

Would it make sense to seamless travel players from the multiplayer match back to the pre-game lobby after it has finished? Or should it be a non-seamless travel?

[twin juniper]

Can anyone help me with something related to advanced sessions?

[winged badger]

non-seamless will disconnect and then reconnect them

[twin juniper]

does anybody know how to call an event on a character bp when the character connects / spawns in, for advanced sessions?

[winged badger]

and the actors attached to PC won't persist iirc

GameMode::PostLogin

[glacial lotus]

@winged badger Thanks. I'll try that

[winged badger]

you have a valid PlayerController there, but nothing else

OnPossessed in the Character, but works only on server side

overriding AGameMode::HandleStartingNewPlayer also works, but you will have to Spawn the Character Pawn manually if you do that, or call a Parent function first

AdvancedSessions don't have anything to do with it tho, @twin juniper

the plugin's work is done before the Character is created

note that both the GameMode options are also server-side only, as there is no GameMode on clients

[twin juniper]

well im currently working with a survival game kit

and they said they don't have much experience with it but they believe I should replace the event begin play in the character with some kind of event that works like that

to fix my problems

[winged badger]

what are you trying to accomplish?

[twin juniper]

I have a multiplayer system with a survival game kit

and there is parts not working

[winged badger]

let me rephrase: what do you want to run from the Event when CharacterBP is spawned?

[twin juniper]

I just want to be able to replace this event begin play with this

https://gyazo.com/d8db3f2a998c0741ff455a4f7c22a2c3

[winged badger]

that doesn't tell me anything

[twin juniper]

I just want to know how to do that

[winged badger]

why is it not working? what reference is invalid? client or server?

[twin juniper]

I don't know i've tried to find it

[winged badger]

and you can't, not without editing and recompiling the engine

[twin juniper]

all I can find is I am pretty sure most likely server

I just need to run that begin play

[winged badger]

that BeginPlay in BP is actually AActor::ReceiveBeginPlay which is called from AActor::BeginPlay

[twin juniper]

or just print string

[winged badger]

in c++

[twin juniper]

sorry I am new to ue4

[winged badger]

i can see that

[twin juniper]

I just was trying to get support from the survival game kit and they sent me this

https://gyazo.com/5ab142693bad14c08cf766643b6823c9

[winged badger]

yeah. that guy has little to no idea what's he talking about

if that collapsed graph on BeginPlay depends on PlayerController reference being Valid tho

[twin juniper]

one second

[winged badger]

it won't be

[twin juniper]

can I give you my old error

[winged badger]

not safe to access Pawn/Character from PlayerController or vice versa on BeginPlay

try EventOnPossessed

[twin juniper]

Blueprint Runtime Error: Accessed None trying to read property Player Building Component from function: 'ExecuteUbergraph_BP_Blueprint' from node: Client Toggle Build Menu in graph: EventGraph in object: BP_Blueprint with description: Accessed None trying to read property Player Building Component

I keep getting this

basically I have a item and I press a button to open a ui

[winged badger]

hah, there could be literally a hundred reasons for that

[twin juniper]

great

wait

one second I have a idea

[winged badger]

is your PlayerBuildingComponent replicated?

does it exist on CharacterBP when you view the client's world in the outliner?

also, strongly suggesting you go to the pinned resources on this channel and read Cedric's Compendium a couple of times if you're going to do any networking

[twin juniper]

okay what?

um

im pretty sure yeah let me check

yes it is

[glacial lotus]

Newbie here but @twin juniper maybe you can do whatever you want to do from GameMode overriding "Ready to Start Match", perhaps?

[twin juniper]

I might try to fix it myself one second

I have a idea

[winged badger]

ReadyToStartMatch will call BeginPlay on clients, indirecly

if it doesn't work on BeginPlay, that won't help him

[twin juniper]

wait how do you make it so you can put a target on a get

so it looks something like this

[deft plaza]

How do I replicate subobjects on an actro

actor

[umbral terrace]

Im very new to multiplayer and just wondering how it all works

Is there any good links to learn how it works?

[rocky badger]

@umbral terrace I suggest one of the Udemy courses. There are two really good ones; one from Tom Looman and another from Sam Pattuzzi or GameDev.tv

[umbral terrace]

ah okay thanks

[rocky badger]

In a multiplayer setting, do all players share ONE game instance? Or is it that each player gets their own?

[sharp pagoda]

@rocky badger The game instance is not replicated, so every physical client gets their own.

[rocky badger]

@sharp pagoda Gotcha. Thanks!

[charred crane]

does seamless travel do something to a session? I servertravel from a lobby into a game, then back to the lobby, and that lobby session doesn't seem to exist.

[umbral terrace]

Can anyone just look at this quickly and see if im doing this correctly it works for the clients and everything but i just want to make sure that im doing it correctly, and this wouldnt let any cheat without memory injection.

[winged badger]

it lets only server set MaxHealth

but if the idea was to only increase Health by 5% each level, it won't work

[umbral terrace]

just wondering why wouldnt it work?

it seemed to when i ran it

[winged badger]

lets say your MaxHealth is 100 on level 1, this would put it to 210 at level 2, 315 at level 3 and so on

actually even worse, and you would have a large difference in health if you skipped a level, like went from 1 to 3 directly

for example, if you started with 100 HP at level 1 and went level by level till level 8 you would end up with 5857100 HP

[umbral terrace]

well than

i think ill think about that when i get to it since it doesnt even work rn

[winged badger]

you need a HealthBase variable, which doesn't have to be replicated

and use that in that multiply node instead of CurrentMax

[umbral terrace]

ah okay