multiplayer

[worthy wasp]

are you CONNECTED to this session your trying to get the name of?

if thats the case - save the struct out of the session your joined to - and you can access its members at any time.

if your looking for OTHER sessions - you'll have to do a ForEach loop - and break the struct

i forget the members that are in this struct - but i'm certain that an ID or a HOSTNAME is one of htem

https://docs.unrealengine.com/latest/INT/Engine/Blueprints/UserGuide/OnlineNodes/

[wary wyvern]

In blueprints I'm trying to get session name like this:
https://yadi.sk/i/5RpuQQ5l3PMj9U

[worthy wasp]

is SESSION stored appropriately?

or is it nulled?

SESSION should be set AFTER joining the server

or....

it will need to be populated as an array from FindSessions() which returns an array

[wary wyvern]

It outputs something like
ServerPC_32345gb34tc345t36345

[thin stratus]

@wary wyvern Cpp is the way to go

And it's not that much work to simply write yourself a proxy node

[worthy wasp]

curious - is that the MAC address of the PC you're connected to?

[thin stratus]

Then you can just call thaz inside of your widget

Similar to how you do it with the default nodes

Check ue4 Youtube channel for steam friends stufd

There i explain the proxy nodes

You can then look up the default create node and apply that to your own node

[wary wyvern]

Well, I can use CPP, no problem, but lack of docs 😦

[thin stratus]

Just gave you docs

[wary wyvern]

No, I mean setting and getting server name

[thin stratus]

Well that's actually kinda findable via google

I have a whole wiki page about the session stuff

Tiny bit outdated but the idea is the same

[worthy wasp]

https://wiki.unrealengine.com/How_To_Use_Sessions_In_C%2B%2B

[maiden atlas]

error C2511: 'void UVitalixComponent::VitalixDamage(float,const UDamageType *,AController *,AActor *)': overloaded member function not found in 'UVitalixComponent'

UFUNCTION(BlueprintCallable, Server, Reliable, WithValidation, Category = "Vitalix_Damage")
virtual void VitalixDamage(float Damage, UDamageType* DamageType, AController* InstigatedBy, AActor* DamageCauser);

bool UVitalixComponent::VitalixDamage_Validate(float Damage, UDamageType * DamageType, AController * InstigatedBy, AActor * DamageCauser)
{
return true;
}

void UVitalixComponent::VitalixDamage_Implementation(float Damage, UDamageType * DamageType, AController * InstigatedBy, AActor * DamageCauser)
{}

Any ideas why this isn't compiling?

[brittle sinew]

How are you trying to call this function?

It looks like you're trying to pass a const pointer as your second parameter when the function doesn't take one

[maiden atlas]

I'm not calling any of these functions yet.

I didn't declare the parameter type as const either

In short, no idea why the compiler is saying const in that error

[vital steeple]

is there a way in BP to get the player controller from the player state? or do i need to place a reference to the controller in the player state?

[jolly siren]

@vital steeple GetOwner and cast it

[stark dome]

I wish the pawn was the owner of the playerstate

Then referencing it on other clients would be simpler

[fossil spoke]

An Pawn is not an persistent object so it wouldnt make much sense.

[stark dome]

That's a good point

[wet lion]

hi, quick question: I have some code that I originally meant for a listen server scenario, where I have a check for GetWorld()->GetNetMode() and if it is NM_Client I do not allow the code to execute. This was meant to prevent clients from invoking it and cheating. Thing is, I only have experience with the listen server approach and this code is controller / pawn related. I am now wondering if instead I should use HasAuthority to account for a dedicated server scenario? I basically don't know if there is a difference in terms of who has who's controller and pawn when there is a dedicated server.

[zenith yarrow]

Hello, I am new to unreal and multiplayer programming in general, I have followed eXi's guide on the wiki to create a session, but when I try to spawn a pawn in the world using StartMach() in gameMode HandleMatchIsWaitingToStart(), I suppose I am not able to posses the pawn as it does not respond to input.

I have used the default PawnWithCamera -> https://docs.unrealengine.com/latest/INT/Programming/Tutorials/PlayerCamera/3/, that I converted to BP and am using it as default pawn in game-mode.

Also, I am goning through the, https://wiki.unrealengine.com/Spawn_Different_Pawns_For_Players_in_Multiplayer, but I fail to understand why he used txt file to choose pawns, and why the shooterExample used ShooterPersistentUser ?

So my question would be, if I am using the correct approach to spawn players here ? And, is there a guide or resource that explains the Shooter Example from unreal ?, it looks like a pretty solid implementation for multiplayer but I can't wrap my head around it completly.

[void canopy]

Guys I wanted to get the instance of UNetDriver. I tried getting its instance in playercontroller class from GetNetDriver() method, but it failed, can anyone tell me why ?

[warm pagoda]

Not off the top of my head, but you can, if you use the debugger. 😃

[void canopy]

@twin juniper Can you help ? I want to know how I can access UNetDriver instance

[warm pagoda]

Uh... the script that runs Unrealbot is certainly not going to parse your natural language question and give you an answer based on knowledge of an API....

Seriously though. Debug your code.

If GetNetDriver is returning nullptr, then step in and find out what it's doing.

[void canopy]

@warm pagoda well that's a good point.

[zenith yarrow]

@thin stratus How much time, would a dude who has shifted from unity to unreal, and is learning unreal while doing Network Programming in unreal using c++, would take to master it at intermidiate level ?

[thin stratus]

Hm

How good are you in Unity

aka c#

Generally, the programming itself is easy. There isn't that much to know, despite the 3 RPCs, variable replication and the conditions on them

The harder part is understanding what classes are available in UE4 that you need to utilize

And on which Actors you are allowed to actually call teh RPCs

if you are used to UNity, then you should know what RPCs are

Grab my compendium and read it.
I would say a skilled unity dev needs 1-3 months maybe. Really depends on you

Might be that you are so good in understanding code structure, that you need a week

• learning c++ if that's not yet done

[zenith yarrow]

Yup have to get my handle on c++ from c#, also woked with UNET and made a multiplayer game with horrible multiplayer code in unity. Because the I made the single player game in one month, and spent another 3 months making it multiplayer. Learned my lesson then that multiplayer games need to be designed ground up with multiplayer in mind.

[thin stratus]

Yus, never start a MP game as singleplayer

But yeah, grab my compendium, it will help you with the framework of ue4

and give you some examples

Rest is up to your skills

[zenith yarrow]

Already downloaded it a while ago, and have been coming across your posts and answers on ue4 answers, they have been quite helpful to be honest. Because the official docs for multiplayer in UE4 is pretty much useless for a beginner.

[void canopy]

@thin stratus I have a client which I want to use in single player mode, if I do not connect this client to any server, it keeps on shooting UnetDriver:Timeout error and it restarts the map, how can I by pass it ?

@thin stratus my situation is to use the same client which I use to connect to game server in single player mode, but after 60 sec it keeps on restarting the map and TimeOut log message comes, how can I stop this if I'm using same client for single player mode, so that I need not to create 2 separate exe for single player and multiplayer.

[thin stratus]

That shouldn't happen to begin with

There is not reason for a client to do that

You must have coded that somewhere

If you start a game, for example in PIE, with 1 Player

and not Dedicated Server ticked

it should just work

It's handled as Authority then

Singleplayer is basically a ListenServer that doesn't listen/accept connections

[void canopy]

@thin stratus ok. Looking into it

@thin stratus these are the parameters with which I start the game . -log -game -ResX=640 -ResY=480 -WINDOWED

[full axle]

I was wondering how can I 'stream' from the audio captured by Media Player to other clients in the same server?

I tried replicating the audio directly but it gave me an error in the logs
FNetGUIDCache::SupportsObject: AudioComponent... NOT Supported

[sturdy surge]

Guys good morning. I'm having a small technical question.
Lets say that we have a open world multiplayer game. To keep performance up we would use a culling distance for relevancy. Lets say its skyrim, people pickup items and equip weapons.
When one player comes into range of another I would like to run a setup and synch the weapons and armor that he is using.
Is there any method that is called when he is relevant?
I thought of using a bool with RepNotify to set to false when the actor is away and then switch it to true when he comes into range. Doing that the repnotify will ask everything he needs to know. Isn't this cheesy?
Is there a better way?

[cold sparrow]

you should use RepNotify - it will be called if your actor is relevant

does any one know how to get a player controller or pawn being inside PlayerState on a server side? I have a function in PlayerState that I call on a server, BUT to get access to my player I have to pass it. I was wandering if there is another way.

if I call GetPlayerController(0) on a server, it gives me 1st player in the list, obviously

[jolly siren]

@cold sparrow GetOwner() and cast it

[cold sparrow]

ok, let me confirm it

awesome! GetOwner -> cast to my controller -> get controlled pawn

[jolly siren]

yep, looks good

[vital steeple]

@jolly siren oh the playerstate is owned by the controller?

[jolly siren]

yeah, i answered you yesterday on that

[vital steeple]

yeah i was just clarifying, i didnt know thats how the heirarchy works

thank you very much!

[jolly siren]

np

[vital steeple]

for some reason i thoguth it was the other way in MP

kewl

[twin juniper]

Hi!

Event begin play is being called for all clients

so i have GUI pop up on clients that are not supposed to have them

how do i solve this problem?

[jolly siren]

check if it's locally controlled

IsLocallyControlled

[twin juniper]

gr8

ill check

worked, cheers mate

[jolly siren]

no problem

[twin juniper]

When I package project with steam integration in defaultengine in config, I have a warning that says it can't find path to steam Api and retries every 10 seconds until it finally fails

[jolly siren]

windows or linux?

did you copy over the dll / so files?

https://allarsblog.com/2016/02/25/basicsteamintegration/

[twin juniper]

Windows

[twin juniper]

Thanks will try tomorrow

[jolly siren]

np

[twin juniper]

Gtg to bed

Gn

[ripe cypress]

anyone know right off what changed with online subsystem or steam form 4.16 to 4.17 cant see hosted game now ?

[heady epoch]

What is cheaper, to replicate a transform across or to replicate both a vector and rotation

[thin stratus]

Transform also has scale

And there are network friendly vector typs afaik

[heady epoch]

So would be cheaper to only rep across two seperate vectors (loc and rot)?

In addition

I am working on client side projectiles. I essentially spawn on the client and server

I have this macro in the projectile. I am not using epics movement replication. I am doing it myself on tick. My issue is that the object that is client controlled and has authority can not access anything from the server. Even a replicated variable such as transform.

The reason I need it accessed is so when the server destroys I can destroy the Client Controlled and Authority projectile but can not access it (I do it this way so projectile spawning is smooth as butter for client regardless of ping).

I will then do some lerping and/or update speed of projectile to match between the two, but the problem is that I can not even access the replicated transform of the server projectile

This is the tick of the projectile. I update manually the transform on the clients of what the server's is instead of using epics replicate movement. This way I can then in theory update the client controlled and authority projectile (The FireItem_Client from a screenshot above) to after being fired incremently slow it down to match where the server is so the laggy user doesn't have delay when firing for good visual feedback, but tweak them slightly to get back in line with the server

[faint fable]

Is the BP set to replicate? not the movement replication option. @Osok#1354

but replicating a transform varible is as expensive as replicate movement ?

[heady epoch]

Yes the bp is set to replicate, but not the movement. In my case the client who fires does not see a replicated projectile since he will only see his on screen (I can destroy the actor on spawn effectively replacing it with their client executed projectile). In theory that should reduce the bandwidth for replication by one object.

The thing is that the CCA pin coming off that macro will return authority because the client controls it and there is no remote object of it. It is authority outside of the server which means it is only seen on the client. Gotta find a workaround to get it seen somehow so I can adjust its movement based on the server.

@faint fable

[dry cloud]

Heya guys, I'm looking for a good game host service, do you guys know of some companies that provide good/cheap solutions for small/mid scale hosting (looking to compare with the big guys like AWS)

[brittle sinew]

I've had luck with both Linode and DigitalOcean personally

Linode's prices are better, but they don't have quite the same ecosystem as DO (the same could be said about either vs AWS as well though)

I can't quite comment on the game host side of it though—I've never really used VPSs for CPU-intensive tasks

I know DO has their high CPU plans if you end up needing that (not sure of the CPU footprint of UE4 servers in comparison to RAM), so that might be worth checking out

[next falcon]

Guys I need your help
i created a project and made it for multiplayer and start it in editor and it works. it creates a session and i can join it too
But if i package it and start it there it failed to create a session...
(I am useing advanced sessions plugin) and sorry for my bad english i hope u understand everything..

[brittle sinew]

Have you checked your logs to see if anything obvious pops out?

[next falcon]

no it said just that createion failed

[next falcon]

should i send u the log file for more infos ?

[thin stratus]

Would help, yes

[next falcon]

Is this the right one ?

[stark dome]

Looks like your game instance is null inside of your main menu widget

@next falcon

[next falcon]

what does that mean ?
and why it works than in editor ?

[dark kernel]

I think I'm missing a piece of a puzzle here. I have this function on an actor:

{

    TArray<UStaticMeshComponent*> Components;
    this->GetComponents<UStaticMeshComponent>(Components);

    pPieceMaterial = Cast<UMaterialInstanceDynamic>(Components[0]->GetMaterial(0));
    pPieceMaterial->SetVectorParameterValue("Tint", R_PieceColor);

    UE_LOG(LogTemp, Warning, TEXT("Hit OnRep_ChangePieceColor."));
}```

I know that pPieceMaterial is set, but for some reason when I use this code in the OnRep function, it's being set to null and I'm not sure why.  If i throw the same code into tick, it works fine

[stark dome]

@next falcon hard to say without seeing you code

@dark kernel when are you setting the piece variable on the server. Its possible that it's being replicated to the client before the components are setup properly

[next falcon]

ill have to go but if i am back i send u some screenshots that will maybe help you to help me

[dark kernel]

I do all that in the BeginPlay function. is there a better way?

[stark dome]

@dark kernel you could run your on rep code from begin play on the client. Check if the color is valid then

[dark kernel]

hmm i'll try that thanks

[quasi matrix]

Player's cant spawn while the host can spawn fine with this BP. Any ideas why they cant spawn? https://imgur.com/a/xf2aY

[severe badger]

your picture is too compressed, I can't read anything 😕

[quasi matrix]

Open the imgur link and zoom in

If you still cant see it i'll cop it and resend

I think its something to do with the index

The pawn target is set to getplayer controller

And that has a index

Im trying to do get netplayer index

Not sure if it will work tho

[severe badger]

I think it's your "getplayercontroller [0]". Try with "getowningplayer"

[quasi matrix]

Anything gotta come of that "getowningplayer"?

[severe badger]

nop

it just gives you the player controller associated with the UI he can see

[thin stratus]

I answer him in BP

It's basically wrong what he does, to put it together

Well yes
you are throwing all multiplayer rules aboard
Read my compendium (pinned to the multiplayer channel)(edited)
Things you do wrong:

- Spawning a replicated Actor on the Client (needs to be on the Server)
- Calling possess on the Client (needs to be on the Server - icon tells it)
- Using "GetPlayerController0", which (on the Server) will always get the Server Controller

Move the code into the PlayerController and put a "SERVER RPC" in front of it.
Call the ServerRPC from the UI. Since you are in the PlayerController of the specific client (whoever on server side) you don't have to use GetPlayerController anymore.

Quote from #blueprint

[quasi matrix]

How do i spawn the actor on the server? Im new to UE4 so excuse my noobiness 😛

[thin stratus]

I wrote that too

Last paragraph

If that's too much for you, stop creating Multiplayer Games and focus on Singleplayer first until you understood the engine.
In the meantime, read my compendium

It answers most beginner questions for multiplayer (however expects you to understand how to use the engine)

It's pinned to this channel

[next falcon]

okay Back to my problem:
: Guys I need your help
i created a project and made it for multiplayer and start it in editor and it works. it creates a session and i can join it too
But if i package it and start it there it failed to create a session...
(I am useing advanced sessions plugin) and sorry for my bad english i hope u understand everything..

what do you need to know to help me ?

[quasi matrix]

@thin stratus So by code you mean blueprints? Im so confused. Atm i've opened player controller and added the server custom event and from there casted to sandbox ui?

[quasi matrix]

think i found a way

Just added a custom event which runs on server infront of the spawn actor

And when the buttons clicked it calls that event

[thin stratus]

That's what I meant

given the event is inside of the playercontroller

cause the widget itself has no Server version connected where the rpc can go to

@next falcon Are you using any Subsystem?

Are you packaging for Dev or Shipping?

[next falcon]

yes i quess the steam subsystem
and where i can see Dev or shipping?

[thin stratus]

Well, in the Packaging Settings in the editor

Are you using AppID 480?

[next falcon]

yes

[thin stratus]

Steam is not active in the Editor

You are basically hosting with Subsystem NULL in the Editor

You probably run into the same issue without packaging if you just run standalone

[next falcon]

and its Dev

[thin stratus]

Are you sure that steam is correctly setup?

When starting as standalone, are you seeing the SteamOverlay?

[next falcon]

how can i fix this ?
Yes it is correct
yes i can open it

and i can create a session in standalone game and its perfectly working

[thin stratus]

Okay, gimme a sec

[next falcon]

thx 😄

[thin stratus]

You have a few access none errors

[2017.11.04-13.54.12:011][536]LogScript: Warning: Accessed None
    MainMenu_C /Engine/Transient.GameEngine_0:MyGameInstance_C_0.MainMenu_C_0
    Function /Game/MyContent/Widgets/MainMenu.MainMenu_C:ExecuteUbergraph_MainMenu:0710
[2017.11.04-13.54.12:011][536]LogScript: Warning: Script call stack:
    Function /Game/MyContent/Widgets/MainMenu.MainMenu_C:BndEvt__Button_111_K2Node_ComponentBoundEvent_113_OnButtonClickedEvent__DelegateSignature
    Function /Game/MyContent/Widgets/MainMenu.MainMenu_C:ExecuteUbergraph_MainMenu

[2017.11.04-13.54.12:011][536]LogScript: Warning: Accessed None
    MainMenu_C /Engine/Transient.GameEngine_0:MyGameInstance_C_0.MainMenu_C_0
    Function /Game/MyContent/Widgets/MainMenu.MainMenu_C:ExecuteUbergraph_MainMenu:0794

You are accessing the MainMenu variable

which seems to be null

In addition:

[2017.11.04-13.54.03:132][  0]LogStreaming: Error: Couldn't find file for package /Script/AdvancedSessions requested by async loading code. NameToLoad: /Script/AdvancedSessions
[2017.11.04-13.54.03:132][  0]LogStreaming: Error: Found 1 dependent packages...
[2017.11.04-13.54.03:132][  0]LogStreaming: Error:   /Game/MyContent/Widgets/MainMenu

And LogModuleManager: Warning: ModuleManager: Module 'OnlineSubsystemSteam' not found - its StaticallyLinkedModuleInitializers function is null.

BP only or C++ project?

[next falcon]

BP only

[thin stratus]

You might want to check back on the creator of the plugin and ask him

Or check his thread for other people that encounter this

I don't use the plugin, so I don't know why it doesn't load

Steam Overlay, does that show up in packaged?

[next falcon]

wait ill look

oh no

it doesn't

[thin stratus]

Yeah then steam already doesn't load

Your config files are properly setup for steam?`

Followed any tutorial?

[next falcon]

yes i did
he just said copy this and put it in there

[thin stratus]

Okay, if it shows the overlay in standalone then it's fine i guess

yeah you might want to check back on the plugin creator

Don't really have an answer for that atm sorry

[next falcon]

hmm okay thanks for help 😄

do you see anything there?
https://forums.unrealengine.com/community/community-content-tools-and-tutorials/41043-advanced-sessions-plugin

sry i am not very good in english

[thin stratus]

Where is the plugin located for you?

In the project folder/plugins or engine?

[next falcon]

both, in the engine it doesn't work

[thin stratus]

You might want to try the project/plugins folder

and then follow his steps

If installed at the project level you need to Create a C++ blank file in the editor to allow it to package out the plugin

[next falcon]

okay ill try this

öhm
my visualstudio licence has ended.. some ideas ? xD

[quasi matrix]

@thin stratus Im so sorry to keep bugging you 😛 must be annoying so sorry, but I've done the event run on server in the UI? so i've done it on button click run event and that just runs it on server within the UI? how'd i do it in the game controller? Do i just put a on click cast run event then cast to game controller?

Lemme post a pic

1 sec

https://imgur.com/a/VTAT1

[thin stratus]

Not in the ui

In your own playercontroller class

Then on butto click you get the playercontroller 0, cast it to your custom class and call the rpc

[next falcon]

@thin stratus I put the folder inside the engine but it will not be shown in the plugins build-in tab..

[quasi matrix]

Das

Your trying to add a external plugin am i right?

[next falcon]

yes

[quasi matrix]

Alright

Go to where your projects files are

[next falcon]

okay

did

[quasi matrix]

It should have binares,content and all that crap in there

[next falcon]

yes

[quasi matrix]

Make a new folder

Called

Plugins

[next falcon]

already done

[quasi matrix]

Inside there

Past the file for your Plugin

Mine being Advanced Sessions

*paste

[next falcon]

but i try to implement the plugin inside the engine

[quasi matrix]

OOOH

You want it so all your projects have that plugin via default?

[next falcon]

yes

[quasi matrix]

I've tried it before, idk how to do it. Sorry ;/

Thought you meant just for 1 project

[next falcon]

for one project is easy but my problem is that it won't work in standalone if only in project..

[quasi matrix]

@thin stratus Should i set the server event to Reliable?

[next falcon]

@thin stratus Can u tell me how i can write this into C++ ?
If installed at the project level you need to Create a C++ blank file in the editor to allow it to package out the plugin

[quasi matrix]

Can't call the function to make the server spawn the actor. tried making it so when event is called it will print a string just to test to see if it was the actor breaking it but nope. Anyone got any ideas whats wrong?
I think it might be the on clicked isnt actually reaching the event? Thanks https://imgur.com/a/ZsTqq https://imgur.com/a/m8aiC https://imgur.com/a/2C1zs https://imgur.com/a/0gWK3

[heady epoch]

If I spawn a bullet on the server but also spawn it on the client to mitigate latency issues, how do I get it to destroy when the server bullet destroys?

How can I link the two

[fossil spoke]

RPC from the Server to the Client that owns that bullet to tell it to be destroyed?

[heady epoch]

I have two players with a dedicated server. When I spawn a projectile on the server and on the client firing there are actually 4 versions of that projectile.

So I fire the item on the server. immeadiately fire it on the client afterwards.

This results in the macro above that i wrote to find all versions. From top to bottom:

There is the client fired item as shown. There is the server fired item. The next one is the replicated server item that shows on the firing client. And the last one is the server replicated item that shows on the other client.

What the letters mean in above screenshot

The server doesn't know the CCA projectile even exists. So if I run an RPC on the owning client from the server it will return the CCNA projectile not the CCA projectile

[thin stratus]

There is a process of linking them afterwards but I'm quite sure that needs cpp

You would probably not load the client verisons of the server one and then link the spawned ones to the server

Then it gets destroyed when server calls it

Since i don't like battling with that, i simply spawn it on the server alone

And let replication do the rest

[heady epoch]

Thanks for the info, how do you mitigate the latency issues then when firing a weapon for example? @thin stratus

[thin stratus]

Well, everything despite the bullet can be emulated on the client

The lag when spawning the bullet can't be fixed like that

But then again, you are not building the game for people that lag

If your game is optimized enough to not cause any lags, it's basically the user's fault and I stopped caring about people that start a game with 200+ pings.

If you still want to fight that, you would need to go the way of spawning the bullet locally

that won't fix the other clients though

only the local one that shot

And if you don't want to or can't implement that "after spawning sync" for replication, then just don't replicate the bullet at all and let the client deal with its destruction

Simply filter in the hit/overlap event if it's the server or not

Let the clietn only do effects while the server deals damage

They don#t have to know about each other for that

[quasi matrix]

So i've been experimenting and when button clicked casting to the player controller wont work? anyone got any ideas? Player controller is where it spawns all my classes with Server custom events

[heady epoch]

I plan on trying to get the after spawning sync to happen because then all that is left is to to some interpolating to match it back up in sync with the server projectile.

Even with 50ms lag you don't really notice the input lag from that when firing for example?

Maybe I am being too critical or extra sensitive

[thin stratus]

@quasi matrix Casting the PlayerController0 to your own class works 100% if you actually set your own PlayerController Child Class inside of your GameMode class to be the default PlayerControllerClass

You should really step back from Multiplayer games for now. You seem to have trouble with the basics of coding and UE4.
Multiplayer adds a huge layer to it that even people with experience in UE4 have trouble with

Once you are more comfortable with coding and UE4, you can get back to it, but if you struggle to call a simple event in your PlayerController, then you aren't ready for Multiplayer yet

It's just a kindly meant advice. You will run into one wall after another like this otherwise

@heady epoch Didn't feel any lag, but then again, I haven't actually tested with 50ms.
Either my 20-40 or 200

@rough iron might know a bit about the syncing of spawned actors, but it's sunday, so might want to wait till tomorrow

[heady epoch]

Thanks, I will ping him a bit later

[quasi matrix]

@thin stratus Just got it to work lol. I forgot to assign the selected character...In too much of a rush xd! thanks for the help.

[heady epoch]

I saved the reference of the projectile into the pawn firing it which allows me to access it. Seems to be working now. A bit of a workaround, but it'll do.

[late sundial]

hey, is there a one good way to begin do nat punch for unreal. this is a question wheres lot of info around net, some say RakNet plugin could do it, someone used gamesparks sfk stuff (i dont know any of c++ so..)

gamesparks sdk

im using steam systems atm it works only on lan, im looking for internet stuff would be cool to get it work

(advanced sessions used) so i need all server info because of serverlist

downloading gamesparks now.. if it has something what i need

[thin stratus]

You are throwing a few things together

Steam should do the nat punch for you afaik

GameSparks is a data backend service for PlayerData and matchmaking (no serverhosting) where you COULD abuse it for ServerLists.

But if you use Steam already you should have online sessions

If it only works on lan then you are missing something/doing something wrong

RakNet is, iirc, a server backend system that would replace ue4s system. For someone who doesn't use c++, you should just stick to AdvancedSession plugin + Steam

[late sundial]

aah

just cant get it work with steamsystem, ive been messaging with zyxel support about the router and lot of people around network about doing right settings in router

[thin stratus]

ListenServer don't need to do any port settings

and if at all, then 7777

But usually only dedicated server need that

• query port

[late sundial]

hmm ok, server are listen atm

https://pastebin.com/XLennnuK

heres setting in engine.ini

2 folders about advanced sessions in "plugins" folder

and basic nodes with the sessions

[thin stratus]

Never used that plugin myself

[late sundial]

ok, i think its same as the default ue version but you can add own settings there

everything should be ok, works like charm in lan play but over internet there is just no servers and connecting by ip on console doesnt work

closes console and nothing

with "open 36.8.528.754" example

tried also with port after ip like 673.623.6.3:7777

[thin stratus]

You need to use 480 app id and that can cause no server to show up

as there are a few thousand by all kinds of devs

[late sundial]

480 is on right now on the ini file

[thin stratus]

Yeah it's the test id

until you get your own

[late sundial]

theres actually a number how many servers it may find on the "find sessions" node, should i pump that up?

its now 1000

[thin stratus]

You can try

:P but usually 480 brings trouble in finding sessions

[late sundial]

default i think its 50 or 100

[thin stratus]

until you have your own

But it def works

Well given you launch the game standalone or packaged

As steam only starts outside of the editor

[late sundial]

aah ok ok sounds good

yea steam gives own, i just havent wanted to release anything before i see it work 😄

but this explains now i understand more

[thin stratus]

No need to release

You can use your own aquired ID without releasing

however you need to pay the fee

[late sundial]

oh

[thin stratus]

I mean, steam is not free :P

Neither is gamesparks

[late sundial]

oh yeah i know the fee, but i thought they give id = you must put game instantly on steam

[thin stratus]

No

[late sundial]

alright cool

maybe the game sees daylight soon! 😄 thanks alot

[twin juniper]

Is there a reason

why charactermovement component's MaxWalkSpeed variable

is static

[brittle sinew]

...it's not?

/** The maximum ground speed when walking. Also determines maximum lateral speed when falling. */
UPROPERTY(Category="Character Movement: Walking", EditAnywhere, BlueprintReadWrite, meta=(ClampMin="0", UIMin="0"))
float MaxWalkSpeed;```

Not sure what you're referring to

[unborn nimbus]

I have a random function that executes on the client and the server but I need the same output on both. Best way to implement this?

[brittle sinew]

Use the same seed in both settings

Depending on what you're doing though, that might be somewhat of a risk, so you might also want to simply pass the output from the server

[unborn nimbus]

That's what I thought but maybe I did someone wrong because it's still not matching

I can't wait for the server because of the delay

Ah, it looks like it was a replication error.

[tulip flax]

I'm trying to build an arcadey vehicle game, which renders the built-in vehicle implementation unusable. I've been warned that I'd have to implement my own network code. Does anyone have a good resource to check out so I can understand just how complex that would be?

I'm assuming the complexity comes from implementing rollback

But I can't find any resources covering the topic

[agile crane]

Hey guys, can someone help me i got a package error unknown on my multiplayer game. This is the error, UATHelper: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.AutomationException: Command failed (Result:10001): C:\Program Files (x86)\Xoreax\IncrediBuild\xgConsole.exe "C:\Users\PC\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+(x86)+Epic+Games+UE_4.17\UAT_XGE.xml" /Rebuild /MaxCP
US=200 /no_watchdog_thread. See logfile for details: 'xgConsole-2017.11.05-22.52.45.txt'

If anyone can help me, thank you.

[next falcon]

Can someone explain to me how replication works?
i told the server with a custom event to remove a actor and than the custom event goes to a multicast event and than in destroy actor
but only the server can see if something is removed..

[thin stratus]

Actor needs to be set to replicate

And destroy only needs to happen on the server

Multicast isn't needed for that event

@next falcon

[next falcon]

ouh okay i forgot that Thanks a lot man

[viral mason]

thanks nintendo

https://i.latouth.com/2017/vTACF6QK.png

That would explain my networking issues

[brittle sinew]

U wot

"Literally forward every single port to one IP, that will probably fix your network issues"

[viral mason]

That's Nintendo for you

Wasn't me that forwarded every port to one ip

but hey

I got ue4 dedicated server working now

[brittle sinew]

No I get it haha, was just commenting on their advice 😄

I just find that pretty ridiculous coming from an official source

"Cant't figure out which ports you need to forward? Just do them all"

[viral mason]

http://en-americas-support.nintendo.com/app/answers/detail/a_id/651/~/how-to-set-up-port-forwarding

If you were wondering the link 😛

i mean really

who plays nintendo & is good at networking

Kids would be the only thing

[agile lotus]

Is it true that if I have things attached to my capsulecomponent they wont be smoothed over the network?

I'm having jittery movement coming from client while on the listen server but clientside everything looks great

[stark dome]

@agile lotus I think the mesh is smoothed

Not the capsule

[agile lotus]

I'm using a papercharacterthough

[stark dome]

Hmm not familiar with how that works. Maybe the sprite component is smoothed instead

@agile lotus

[vital steeple]

can playerstates not run RPCs or am i just doing something wrong?

i have a server RPC in my playerstate but it says it has no owning connection

i swear ive done RPCs in the playerstate before

[fossil spoke]

@vital steeple PlayerStates on the client side have no Owner, they are only replicated via the GameState. For RPCs to be called there needs to be an NetOwningConnection. If you want an PlayerState to RPC from the Client to Server you need to use an Proxy that has an NetOwningConnection.

[tawny parcel]

I have some code that is pretty straight forward - pick a character template (click the UI option) and spawn that character and possess it. It replicates with no issues and works perfectly.

I have it setup so when ServerTravel runs it saves the character option locally and re-runs the spawn character and possess sequence - the same sequence that works perfectly. For some reason it feels like if it is activated off of PostLogin or EventHandleStartingNewPlayer it does not posses the character. The correct character spawns but controls are frozen - I can't move or do anything.

Any thoughts?

[void canopy]

@vital steeple you can make RPC in player controller and get the reference in player state and then can call those funtions which you are calling from playerstate. But its advised to change the values of playerstate on server calls only, not on clients.

[tawny parcel]

Figured out my issues - although an odd one - a disable input in the construction script of the character was getting fired on the saved spawn but not at the character select.

[dense citrus]

i got an issue , when i´m plying multiplayer clients are laggy after couple minutes they cant even play anymore.

any idea i have only characters and a door replicated

😄

[past bear]

erk, ChoosePlayerStart apparently happens before OnPostLogin - is there an event earlier than OnPostLogin I can use to set a var inside the player controller?

[thin stratus]

Login

C++

PreLogin - No PC - Allows Deny of login (kick)
Login - New PC - Allows Deny of login (kick)
PostLogin - New PC - When succesfully logged in

[past bear]

...and in blueprint I'm screwed, then I guess?

[thin stratus]

Of course

I mean, why would you expose Login and PreLogin when PostLogin exists.
That would give users control over their game, how barbaric

Na but for real, Login is probably the earliest event you can grab

[past bear]

yeah, I don't have access to that -_-

need to allocate a var when the player connects and pick an appropriate spawn point :/

[thin stratus]

BP only projects are really a plague

Well, you have Choose and FindPlayerSpawn

[past bear]

tbh, choose player start should happen after login

[thin stratus]

It does, if you delay the game

GameMode settings "Delayed Start"

Override "ReadyToStartMatch"

[past bear]

yeah, it's not delayed, that isn't up to me

[thin stratus]

Well then tell whoever hired you that you need more freedom

:P No one gains something from limiting the programmer

[past bear]

we're entering match state via a custom matchmaking system, so I have no control over it

[thin stratus]

So the game starts before everyone is connected?

[past bear]

(it isn't even in the engine, it's an external service)

yes

[thin stratus]

Good service

11/10

[past bear]

it's intentional because of how the game works

[thin stratus]

Well, then you access c++

[past bear]

it isn't strictly 'round based' like UT

[thin stratus]

Do people really deny you access to c++?

[past bear]

yep

[thin stratus]

It's just one event that you would put into the c++ baseclass

jesus

You wouldn't even put logic into that, just write your own exposed login function

[past bear]

I have visual studio, but I cannot access the internal system for making code submissions, it's driving me nuts

I keep asking for it, but don't get it

[thin stratus]

How do they expect you to finish your task?

That's just plain stupid

[past bear]

they expect me to work around the problem

[thin stratus]

80% of the engine is hidden in c++

Blueprint only in Multiplayer games is not a solution

.>

You can't work around that

Only by creating your own spawning logic

Remove the DefaultPawn Class from the GameMode

[past bear]

well, I might be able to allocate said var inside 'ChoosePlayerStart', but honestly that's just a bandaid

[thin stratus]

and onPostLogin you spawn it yourself

Then you can set a variable in the playercontroller before spawning

What is that var anyway?

brb coffee

[past bear]

it's a struct that ties the player to a specific group of other players and a specific objective

[thin stratus]

Why does that need to happen pre postlogin?

You could try to use the BeginPlay of the PlayerController

[past bear]

needs to happen before choosing player start, so I can allocate the start correctly

[thin stratus]

That might call before PostLogin but not sure

[past bear]

but the game mode controls allocating these roles, not the PC

[thin stratus]

Yeah and? Get the gameMode in the PC

Just to set the vars

Working around the problem...

Or as said, spawn the pawn yourself

[past bear]

it's a generic PC though

used across multiple game modes :/

ergh

[thin stratus]

Ah

Well, generic GameMode can have a function to "retrieve" the information

which the child gamemodes override

Then you generic PC just calls the generic function

¯_(ツ)_/¯

However, spawning the Pawn yourself is cleaner

OnPostLogin -> Allocate Var -> Choose spawn -> Spawn

[past bear]

I can't do that because the actual spawn is native

(relies on callbacks to services)

[thin stratus]

I really doubt that you will find an event earlier to the native GameMode spawn

Despite Login

Or ChoosePlayerStart

But you said that's already not working

[past bear]

I'll try allocating inside ChoosePlayerStart, it seems cleaner than having logic going around in a circle from PC to GM to PC

[thin stratus]

True, not ideal but yeah

FindPlayerStart is also a thing

Can'T remember which is called when

[past bear]

argh, doing it in ChoosePlayerstart would of course fuck up if it's later modified to allow respawning

head-desk

Lord I want to scrap this awful game mode, it doesn't stick to any of the conventions of the other four, meaning that all the generic / preexisting mode logic has to be rewritten / fudged around -_-

yep, looks like I can allocate that data when choosing player start

thanks ^^

[rough iron]

@heady epoch @thin stratus there is no magic syncing code, networking is slow, so if you need more precision you have to optimize and simulate in client-side.

[thin stratus]

You can't tell UE4 to link 2 non replicated objects to each other?

Spawning one on Server and one on Client and then linking them?

@rough iron

So basically generated the replicate state after they were spawned?

[jade patrol]

guys, does steam subonline system still works for 4.18 ?

[rough iron]

sep, because the one you spawn in the clinet and in the server will have different ids

so it's better to simulate it

that's how Epic simulates projectiles in UT

you can then even have a pool of reusebale client-side projectiles

[thin stratus]

So you basically say, shoot one on server and one on client (as well as non local clients) and only perform damage on the server one?

And if they, for what ever reason, behave differently, you just live with it?

Let's check out UT code i guess

/** enables UT optimized movement replication; USE THIS INSTEAD OF bReplicateMovement */
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Replication)
    bool bReplicateUTMovement;

sigh

[sterile pebble]

lol

I wish to have this check box in my game :d

[thin stratus]

void AUTProjectile::BeginPlay()
{
    if (IsPendingKillPending())
    {
        // engine bug that we need to do this
        return;
    }
[...]
}

lol

Hmm

// Move projectile to match where it is on server now (to make up for replication time)
float CatchupTickDelta = MyPlayer->GetPredictionTime();
if (CatchupTickDelta > 0.f)
{
    CatchupTick(CatchupTickDelta);
}

@rough iron So they are just syncing it

Ah wait lol

They really have a fake projectile

They really iterate over all fake projectiles and find the one closest and matching

[rough iron]

Yep

[thin stratus]

They are syncing them, does the client see two projectiles then or is the server projectile invisible for the client?

[rough iron]

the client only sees the fake one

[thin stratus]

Is that simply done with OwnerOnlySee/OwnerNoSee?

[rough iron]

I think yes

[thin stratus]

Alright, hm

[rough iron]

might need some work to work properly for listen server though

UT is notmally designed for dedicated servers

[thin stratus]

Yeah, might need to add a similar system then

Wondering if it needs all of their code or if that can be shrunk a bit

Doesn't that only make up for the few ms that the client wouldn't see the projectile?

Well will just try it i guess

AUTProjectile* NewProjectile = 
        ((Role == ROLE_Authority) || (CatchupTickDelta > 0.f))
        ? GetWorld()->SpawnActor<AUTProjectile>(ProjectileClass, SpawnLocation, SpawnRotation, Params)
        : NULL;

So either server or "CatchupTickDelta" on client spawns a projectile

float CatchupTickDelta = 
        ((GetNetMode() != NM_Standalone) && OwningPlayer)
        ? OwningPlayer->GetPredictionTime()
        : 0.f;

float AUTPlayerController::GetPredictionTime()
{
    // exact ping is in msec, divide by 1000 to get time in seconds
    return (PlayerState && (GetNetMode() != NM_Standalone)) ? (0.0005f*FMath::Clamp(PlayerState->ExactPing - PredictionFudgeFactor, 0.f, MaxPredictionPing)) : 0.f;
}

Is there any documentation on what they base these numers?

They take the ping in ms and subtrack like 20 from it

And then divide it by 2000

:/

[next falcon]

I made a box which is a Item with ItemID an ItemAmount
if i pick it up with a client it will add to my inventory the Item with the right ItemID and the right Amount (i get the itemid and itemamount with Widget interface)
But if i do the same thing as Server it won't give me the id and amount..
what went wrong ??

[lean river]

Im not sure but maybe exact ping is answer-respond latency so you need predict movement ping / 2

Dont know what fudgefactor does :D

[next falcon]

wait what.. can u explain it for a noob ?

oh wait

[lean river]

Sry its not for you ^^

[next falcon]

not for me sry

xD

[thin stratus]

@Amph#1230 It's like set to 20 (the factor) and yeah, could be? idk

[rough iron]

@thin stratus the local client who fired the projectile get's it insantly, while the other will have an initial lag. It is also cheaper to reuse those projectiles and not to require to send spawned actors over the net.

the number are magic xD there was an artilcle some time ago (10 years) about those magic numbers taken from Halo xD

many use those xD

[thin stratus]

Good to know. Yeah, the other clients just get the main, replicated projectile, or?

Only the local client spawns a fake one

[next falcon]

guys i need you help..
in my editor i can create sessions with a name and max players and in my server list everything will show like name ping player etc.

but if i package it and create a session with name and max players and search for it than it show me a server with no name and 0/0 players..
what went wrong ?

and yes my steam overlay is active

[jolly siren]

@next falcon the 0/0 players thing is a known bug https://issues.unrealengine.com/issue/UE-45381

Feel free to add your vote. Currently it is targeted to be fixed in 4.19

[next falcon]

thanks buddy

[jolly siren]

sure, no problem

[agile lotus]

Does anyone know what would cause jittery movement from clients on server side

[acoustic yew]

Do you use Character ?

[agile lotus]

PaperCharacter

[acoustic yew]

do you do some high speed movement ?

[agile lotus]

Nope

its slow movement

[acoustic yew]

There is know issue with high speed Movement

and are you useing 4.17 or 4.18 ?

[agile lotus]

4.15.2

[acoustic yew]

oh

hmm

thiss issue kinda didnt affected that version

On no im sorry it affects 4.15 too

https://issues.unrealengine.com/issue/UE-45034

here is the issue

how ever its told its only on high speeds

[agile lotus]

I don't use dedicated servers

Only listen

And this is on a packaged build running through steam

[thin stratus]

Are you modifying MovementSpeed?

[agile lotus]

I do I switch between 2 speeds

Do you think that could have something to do with it? Maybe I'm not setting the speeds properly

[thin stratus]

Yeah, are you setting them on everyone?

Cause MaxWalkSpeed doesn't replicate

If you only set it on the Server, client and server will constantly fight over the position of the client

[next falcon]

I made a box which is a Item with ItemID an ItemAmount
if i pick it up with a client it will add to my inventory the Item with the right ItemID and the right Amount (i get the itemid and itemamount with Widget interface)
But if i do the same thing as Server it won't give me the id and amount..
what went wrong ??

[acoustic yew]

Cedric Im interested how you would approuch seeting maxwalkspeed if netculldistance is taken in account or new joining player? Is propper way would be to do some RepNotify Veriable and set it in it ? Becaue MultiCast would probobly dont work in this case ?

[thin stratus]

Yeah, repnotify

If it's only about Sprint/NotSprint, you can use a boolean

otherwise use a float and set it to what ever the speed is

[acoustic yew]

Yes its something like Sprint

[thin stratus]

and in the onrep you use that to set it

well then you use the boolean with onrep

@next falcon Buddy, no idea what went wrong. You have to post your code.
Otherwise we can only guess that you do something wrong.

[acoustic yew]

Ok grate thanks

[next falcon]

this code?

Better quallity (i hope)

[agile lotus]

@thin stratus You were right I was only changing MaxWalkSpeed on server

[agile crane]

Can anyone help me? i'm getting a package error when i turn on advanced sessions or online subsystem plugins on my multiplayer game. Here's the error, UATHelper: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.AutomationException: Command failed (Result:10001): C:\Program Files (x86)\Xoreax\IncrediBuild\xgConsole.exe "C:\Users\PC\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+(x86)+Epic+Games+UE_4.17\UAT_XGE.xml" /Rebuild /MaxCP
US=200 /no_watchdog_thread. See logfile for details: 'xgConsole-2017.11.07-00.58.31.txt'

If anyone can help me thanks so much, i really need to fix that error 😦

[vital steeple]

@fossil spoke thank you! by proxy do you just mean i need to pass it through some actor or controller that DOES have an owning connection? ie playercontroller or possessed pawn?

@void canopy thank you 😃

[fossil spoke]

Yes.

Or the GameState

[vital steeple]

got it

just working on a chat system and trying to wrap my brain around a kill reporting system

[fossil spoke]

Id implement the killfeed callbacks on the GameState.

[vital steeple]

yeah i currently have an actor report its death to the gamestate before it destroys itself

i was trying to update replicated variables int eh playerstaet (one held all the chat notifications) using RPCs, which wasnt working

i can just use the controller instead

i think i can just as easily store that data in the controller and run everything from there

[fossil spoke]

Sure. Just dont forget that an Client only has their own Controller and not everyone elses.

[vital steeple]

yup, i was going to get the player list from the gamestate, then get the owner (to get the controller) then populate that data

the player controller persists throughout the entire multiplayer session, correct?

[nocturne copper]

Anyone have any luck with useing differnt game modes for the same map?
I am still in the process of fully testing the restructure I did on my game mode parent that
I changed to use some C++ to change the game mode for the map that is being traveled to via. Seemless travel

I have also been reading around a bit with people mentioning trying to use multiple game modes for a single map so as not to waste resources on cloneing the same map for just a few changes

[stark dome]

@nocturne copper yup you can set the game mode when you load the map

@vital steeple are you running that code on the server? The only player controller that exists on clients is the local players controller.

On the server each player should have a player controller

[fossil spoke]

@vital steeple The PlayerController persists through that level. Once an new level is loaded an new PC is created for that Player when that Player finishes joining the new Level.

[thin stratus]

https://www.unrealengine.com/en-US/blog/finding-network-based-exploits

[thin stratus]

https://puu.sh/ygJ76/9cc9ca7286.png

Anyone having information about these settings

Despite cull distance

Like what numbers affect it how

@chrome bay Maybe?

[chrome bay]

oh hey wut

Ah yes

[thin stratus]

Want to give our pawn higher settings, but don't want to overshoot it

[chrome bay]

From my findings:
Net Priority = in times of low bandwidth, how are we prioritised for replication over other objects
Update Frequency = how many times per second object is considered for replication
Min New Update Frequency = When Adaptive Replication is active what's the min frequency to check for updates

Take all that with a pinch of salt though...

[thin stratus]

Last one says it's a throttle

when things replicate infrequently

I'm a bit interested in what numbers I can enter

Like UpdateFrequency

Is 200 too much arleady or can you go to 500

etc

(throwing in random numbers)

[void canopy]

Hi everyone. I'm trying to build my dedicated server using this link. https://wiki.unrealengine.com/Standalone_Dedicated_Server . After finishing the compilation, when I tried running binaries of the game I saw this

[thin stratus]

How do I show netcorrections on clients again

[void canopy]

This is the error I got after building server with the configuration settings provided in this link. https://wiki.unrealengine.com/Standalone_Dedicated_Server

[thin stratus]

Ah. p.netshowcorrections

I guess?

[sterile pebble]

@thin stratus

[void canopy]

Hence I'm not able to build a exe of my dedicated server. Any helps UE4 Devs

[thin stratus]

Where do you enable the adaptive one?

Or is taht on by default

@void canopy You build via VS?

The Server?

Mäh, netcorrections only work for CharacterMovementComp

-.-

[void canopy]

@thin stratus Yes VS 2015

[sterile pebble]

weell, looks like its net frequency are measured in 1/sec ; so its how much you replicate data in seconds; and I suppose it wont get higher than you fps

[thin stratus]

I just deactivated ReplicateMovement on my pawn

Since I'm setting it by hand anyway

Everythings smooth with 150+ ping

-.-

@void canopy Have you then packacked your game?

And moved the exe into the packaged binaries folder next to the game exe?

[void canopy]

I checked my server.exe in binaries folder

And that's the error it gave me when I opened the exe in the binaries

@thin stratus

[chrome bay]

Folks where you do add options to the clients 'options' string again when they join a match

it's escaping me

[thin stratus]

@chrome bay on the client travel function

Playercontroller

Iirc

@void canopy so you did package your game?

Cause you didn't really answer my questions

[void canopy]

@thin stratus I built the game in VS by changing the configuration to development server 64bit from the UBT. After this now I will package the server from Unreal Editor as you have asked me to package the game

[thin stratus]

Yus and then you copy paste the server.exe INTO the binaries folder of your package game

PackagedGame/GameName/Binaries/Win64/ or so

@void canopy

[thin stratus]

When sending text via a multicast, what's the best type to use for that?

Thinking my Name variable isn't really optimimum

[thin stratus]

Hm nvm, name is the best thing to send actually

[jolly siren]

Yeah FName is the smallest, 8 bytes

[thin stratus]

Also, what do you peeps do for timer replication?

Currently trying to multicast the start and starting a fake timer by passing UTCNOW so I can sync it

However I can't really offset the timer easily

[stark dome]

I remember reading somewhere that FNames aren't compressed so there could be some overhead there

https://docs.unrealengine.com/latest/INT/Gameplay/Networking/Actors/ReplicationPerformance/index.html

[thin stratus]

Well what is better than?

I only sent it once per ability used (which usually has ~10 seconds cooldown)

[lean river]

As i remember fnames converted to strings when replicated

[thin stratus]

Also, got a Struct that is replicated.
That struct has a datetime variable. Clients print something else than the server in its onrep

Guess DateTime can't be replicated?

Wäh, known bug

Whyyy

So I need to split it

¯_(ツ)_/¯

[merry hemlock]

I have a simple demo with no gameplay to worry about, I just need to be able to have 1 spectator click buttons but until there is a native spectator interaction, multiplayer is probably the best option

My question is, what is the general process for a local multiplayer (non split screen) either both players VR or one is just using a mouse/screen

[thin stratus]

When using ReplicateMovement, the rotation is also replicated, right?
Is there a way to interpolate that number without replicating it myself?

[lean river]

in tick maybe if you save old rotation and if you got new ?

then just delete old one and set new as old one or something like that

[thin stratus]

Tick might call way more often though?

Looking at how often replicate movement calls in the net profiler, i doubt that replicating it myself is a good thing

Currently looking through the codebase to see if i can do something in c++

[lean river]

well tick is close enough for interpolate. running fast but you can controll interpolation time actually
so lets say if XX sec or ms or whatever needed between two replication you can calculate interpolation speed from that maybe

[thin stratus]

/** Update location and rotation from ReplicatedMovement. Not called for simulated physics! */
virtual void PostNetReceiveLocationAndRotation();

Wonder if that still sets it even if SimulatePhysics is true

Probably not

Only place where ReplicatedMovement.Rotation is used though

@chrome bay Did you perform any rotation interpolation with Pawns?

[heady epoch]

I have a team color assigned on spawn in the game mode. The player color changes. I also have a hud with a minimap showing player location. How can I assign the minimap icon color to be the same as the character's team? In the HUD blueprint I can not access server values. So I have no idea of how to get the team of the other connected clients

in the pawn onrepnot

Now on the remotw if the player is locally controlled i also assign the color in the client side of my pawn so I can access it in my HUD

[heady epoch]

fixed

repnotify with an extra variable

[dark kernel]

Does anyone know what this warning is saying? I'm having no luck with google finding a solution. pretty sure it's replication-related though:

LogNetPackageMap: Warning: FNetGUIDCache::SupportsObject: MaterialInstanceDynamic /Game/Levels/UEDPIE_1_DemoLevel.DemoLevel:PersistentLevel.BlackPieceBishop2.MaterialInstanceDynamic_1 NOT Supported.

[next falcon]

This is the Server side Destroy actor

And this is the item pickup which include the destroy actor for all
if a client does it, it works Perfectly
but if the server does it, it destroys actor just for the server and not or all clients and give not the right item
also it destroys all actor not only items
the client can only destroy Items nothing else..

[chrome bay]

@thin stratus I think I do.. lemme check

Oh no i don't, I just set it

In this game anyway

[thin stratus]

Hm, having a higher ping makes the rotation snap on non-local clients

Don't want to set it via tick

.>

And I can't intercept rotation when bReplicateMovement is on

[chrome bay]

Yeh I hard-set it, and visual items (mesh etc.) intepolates over a few frames via smoothing

same way as CMC

I set rotation cus otherwise aiming starts getting really out of sync

[thin stratus]

I guess I can interp the weapon

However I set actorrotation

Well, I'll see what I do

It's just for visuals I guess

Just don't want it to snap

[merry elk]

Hi guys! I am trying to find a C++ code that will run a player drops out or logs out of the current session (Kinda similar to PostLogin but for Logout). Would someone be able to point me in the right direction? I have had trouble finding it 😐

[twin juniper]

hello, does anyone know why am i getting this message?

LogNetPackageMap: Warning: FNetGUIDCache::SupportsObject: Texture2D /Engine/Transient.Texture2D_4 NOT Supported.

lemme rephrase

if i do a RPC from client to server, and pass a texture2d as an argument

this texture won't show up on server, right?

how do i solve this problem

[timid pendant]

hello does anybody know why my server would bind to 0.0.0.0:7777 and not my ipv4:7777

I already port forwarded and checked firewall rules

[wild prawn]

0.0.0.0 means 'default adapter' on Windows and 'all adapters' on Linux and BSD systems

should be fine

[viral mason]

God I haven't been able to get this multiplayer inventory system working

Mainly a weapons holding system

So every other player knows what weapons/stuff you have

[stark dome]

@viral mason what issues are you having

[viral mason]

Well in each player's ZombiePlayerState

they have an Weapon Base Array

Trying to figure out how to put inherited classes into it

(Bit more background info---

AssaultRifleBase is a child (inherit) of WeaponBase, while Ak47 is a child of AssaultRifleBase

[stark dome]

So are you asking how to add instantiated weapons to that array?

[viral mason]

yes

[stark dome]

Just call Add on the base array and pass in your created weapon actor

[viral mason]

How would i create the weapon actor

Oh wow, i think i did it

What server area has access over player state

[stark dome]

@viral mason do you mean what classes have access to it?

[viral mason]

Like where would an ideal place to put server logic to manage a users weapon array

[stark dome]

Depends on your inventory. Character makes sense

But if you want it to persist through death it doesn't

In that case a PlayerState or playercontroller

[viral mason]

the weapons array is in playerstate

and it will persist through death

[stark dome]

@viral mason so the server has a copy of it just run the logic in there

[twin juniper]

hi, i want to send a texture2d (image) from client to a dedicated server, via a RPC... is this possible and how would i do that?

[shy nymph]

Anyone any experience with Advanced sessions plugin and dedicated servers?

[lean river]

@twin juniper if texture is in your content just pass as pointer

[twin juniper]

it is not, it's received from steam

it's actually on client

steam image

i wan't to apss it to server somehow

@lean river

so to be more precise, client connects to steam, obtains steam avatar, and now i want to send this avatar to server so the server can save it

and i'm using dedicated server

[jolly siren]

https://forums.unrealengine.com/development-discussion/c-gameplay-programming/25519-sharing-pictures-between-clients-at-runtime?54775-sharing-pictures-between-clients-at-runtime=

@twin juniper good place to start^

[twin juniper]

@jolly siren i saw that thread but couldn't understand it... i tought that it shouldn't be so hard...

is this achievable if i have a blueprint project

[jolly siren]

If you use something like VaRest then yes it should be

https://www.unrealengine.com/marketplace/varest-plugin

[twin juniper]

ok, i understand, but i'm going to be bitchy and whiny nevertheless... this looks like a task that should have been possible out of the box 😄

[lean river]

Maybe this helps..
https://answers.unrealengine.com/questions/437212/steam-profile-image.html

As mentioned by erebel55
You can grab any image through backend, http request and im sure steam api maybe also provide solution ^^
But im sure no one click solution exist :)

[shy nymph]

Hey guys i'm trying to get a 6Degrees of freedom movement multi player going for my studies but been strugeling to get a smooth replicated motion going for two weeks... Anyone any experience who might be able to help? :(

[lean river]

Smoothing movement over the wire is not an easy task.

You need smooth client side prediction to achieve and compensate network latency

There is lot of good article to learn this:
http://www.gabrielgambetta.com/client-side-prediction-live-demo.html

Or this:
http://www.kinematicsoup.com/news/2017/5/30/multiplayerprediction

This articles explain problems, solutions.. once you got it you will know what you need do ;)

Epics character movement comp also can help if you need code example, but i suggest to read articles before code

[shy nymph]

thanks i will check thoose links out, the epic char movement comp doesn't work for physics based movement right? so its out of the question

[lean river]

Well from point of networked movement and client side prediction no matter we talking about physics movement or simulated movement

I mean its matter but the core of prediction techniques will be same like smoothing, entity interpolation, server reconciliation etc

Just you need work more data when you try predict physic based movement for example angular forces, linear forces maybe :)

Instead of single velocity / location / rotation

Of course easier when you dont need to deal with physcs, but actually one of the article is about physcs based movement, other one just input and simulated movement based

[shy nymph]

sounds good, hopefully this can help me, thanks very much

[thin stratus]

"ChoosePlayerStart" calls before PostLogin calls?

o.o

@past bear That's something you said last time or?

[past bear]

yep

[thin stratus]

Alrighty, guess who will expose login and pre login to blueprints

[past bear]

haha

[thin stratus]

Same problem as you had

Assigning team in PostLogin is too late for spawn selection

gg

[past bear]

yep - seems like the default event ordering is wrong

makes no sense to allocate a player start to a player who hasn't logged in yet

[thin stratus]

Na, I assume LOGIN is what calls before spawn

PostLogin is only the notification that he logged in already

So basically "valid" to spawn

[past bear]

yeah, PostLogin says he's successfully logged in, ergo now he should be good to spawn

[thin stratus]

Yeah you would think

Probably Login->Spawn->PostLogin

[past bear]

seems likely

but no Login in BP xD

[thin stratus]

Will post here if I find the order

[past bear]

cheers!

[thin stratus]

In UWorld
Calls AGameModeBase::PreLogin(..) when a new players tries to join/login via a ControlMessage "NTM_Login".

In AGameModeBase
PreLogin is not implemented and would need to be overridden.

In UWorld
Calls SpawnPlayActor(..) when the ControlMessage is "NMT_Join".
SpawnPlayActor(..) calls AGameModeBase::Login(..).

In AGameModeBase
Login(..) calls InitNewPlayer(..).
InitNewPlayer(..) calls FindPlayerStart(..).
FindPlayerStart(..) calls ChoosePlayerStart(..) if player doesn't have a spawn already assigned.
ChoosePlayerStart as well as FindPlayerStart are BlueprintNativeEvents, so they can be overridden in Blueprints (as known).

In UWorld
SpawnPlayActor(..) then calls AGameModeBase::PostLogin(..)

@past bear

That's also the order top to bottom

So PostLogin gets called after the spawn point got found

The first SpawnPoint for the internal system gets searched inside of "Login"

PostLogin is labeled as "From here on it's save to call RPCs on the PlayerController."

Which is fair I guess. It's just sh*t that they don't expose Login and PreLogin.

[past bear]

aye

thanks for that

[thin stratus]

I do think they don't expose that cause they still think BP users are a bit.. less good in programming

So they can't call an rpc on that playercontroller by mistake

...

[past bear]

tbh, I've seen the shit I do in BP and I wouldn't trust me with it either, haha

[thin stratus]

:D Yeah I just exposed it and left nearly all parameters out so I don't accidentally crash something

F*ck it. I can't add the K2 event atm, Super::Login is called too early in my older GameLift stuff.
Guess ChoosePlayerStart it is for assigning the Team -_-

[jolly siren]

I assign my teams in PostLogin before the super call

(and in InitSeamlessTravelPlayer but that is just for travel stuff)

nvm didn't read all that bp talk

[pallid mesa]

hi there! Local player dependent information: https://cdn.discordapp.com/attachments/371769980796141570/377604468146962453/a03078c484122271efc95b0c1e87a638.png VS GetAllactorsOfClass Instead of postlogin actors In one side i have the information straight away in the client, and in the other side i have to mantain an array locally to keep track of connected actors, also have in mind that player array here is forbidden since its located in the gamestate on the server and i would get tons of nullptr errors! I would like to know if get all actors from class is a reliable way, i know in first hand this is not very friendly efficient but this function won't be runned too much, also it will be client side only (local player)

[thin stratus]

forbidden since its located in the gamestate on the server and i would get tons of nullptr errors!

Wat

PlayerArray IS the proper way to access PlayerReferences on the Clients

GetAllActorsOfClass is def not the proper way, even if it's reliable

It's not located on the Server alone. PlayerArray is available on Server AND Client

it's not replicated cause PlayerStates on Client side add themselves to it

@vorixo#7101

Aaand I can't add. Ty discord -.-

[brittle sinew]

@pallid mesa

Hehe

It works if you manually tag them by ID ¯_(ツ)_/¯

[pallid mesa]

It returned nullptr and didnt work @thin stratus

Only returned OK on local player

[thin stratus]

Then you simply call that too early

[pallid mesa]

Well after 20 seconds delay on begin play

On pawn

With 4 clients

All of them being spawned

[thin stratus]

Then something else is broken.
The PlayerState 100% contains all Clients/ListenServer PlayerStates on each entity

And is the proper way to access these

eh

[pallid mesa]

Dc server

[thin stratus]

PlayerArray

Doesn't matter

I included ListenServer

Cause it's also a client

GetGameState->PlayerArray->ForEachLoop gives you all you need

[pallid mesa]

It didnt work i mean size in length was correct

But it failed checking the content of the object

[thin stratus]

The PlayerState in it?

Or the GameState itself

[pallid mesa]

Yep player state to owner as controller

And from owner as controller to controlled pawn as my pawn

Chain is

PS -> owner -> cast to my controller -> get controlled pawn -> cast to my pawn -> execute arbitrary logic on my pawn

Which is said text

[thin stratus]

That doesn't work obviously

GetOwner is not valid on Clients for other clients

[pallid mesa]

Yeah xD

Thats what i mean

[thin stratus]

Your screenshot doesn't show any Character

It only shows the PlayerState

[pallid mesa]

PostLoginActors is supposed to be pawn array

Sorry that didnt came explained

:(

My bad

[thin stratus]

Your screenshot still only shows accessing the PlayerState

Which is possible with the PlayerArray

if you want the PlayerCharacter

then you just need to save a reference of it in the PlayerState

"Possessed" event

Gives you PlayerController

Get PlayerState -> Save Character ref to replicated var

Then you can access it via PlayerArray

[pallid mesa]

Well, the array is a char array so the image shows characters xD So... each PS should have a var of the controlled pawn refoed

I cant use get owner, makes sense

[thin stratus]

Yeah

But you should also check if that's even needed

Why does the Client need to call stuff on other clients Character?

Maybe the code should be inside the Character

as that has a PlayerState pointer too

[pallid mesa]

Its on tje characyer

[thin stratus]

And could access it and change based on PlayerState stuff

[pallid mesa]

Cached player state is a character cached player state variable

The associated PS

[thin stratus]

Character HAS a playerState variable by default

I just wonder why you need this long way to tell the Character something

[pallid mesa]

It is not my type, i need team num

I need to access a lot of times this player state variable

[thin stratus]

Doesn't matter that much as you can cast it

[pallid mesa]

So i cached it

[thin stratus]

Yeah ok

Maybe you should work with delegates

aka EventDispatchers

[pallid mesa]

Just for the sake of optimisation

[thin stratus]

So the Character just listens to them

[pallid mesa]

Mh hold on im on phone

[thin stratus]

dinner now anyway. brb

[pallid mesa]

Yeah oki we'll talk afterwards if you can

Have a good one!

Well, I'll keep posting

This code is basically to modify a text component on Characters according to the local player team (got from cached (*PS).TeamNum)

So all the allies of the local player will have a text saying "Ally"

While all the enemies of local player will have a text saying "Enemy"

The code is located on character

And im looking for a reliable way to implement this without doing any crazy logic implying loops

A delegate is a good point i also though about but i didnt know where i could locate it since the team of a pawn can change in runtime and its something the local player has to get track of it

[hasty adder]

Who knows if this is the rigt channel for it but, anyone ever look into making dedicated servers have the ability to download and update itself?

I mean I guess easiest night just be a separate utility to include with the package to check a text for version and goto a Ftp to download an update if it exists or something. Like server launcher program

[twin juniper]

idk if i should post this in blueprints or multiplayer, but how do i make like a lobby system (player makes a session, everyone joins and when he presses start, everyone opens a same level in same session)

well, i think i could just say how to make all players in session join into other session from host

[acoustic yew]

This might Help you https://www.youtube.com/watch?v=abmzWUWxy1U

He goes over how to make Seesion and how to Join to them

[twin juniper]

well, that i know

but how to transfer players

oh i just realized something

i can give info to all players from host of new session hes joining

and then all other players just join that session by a session info variable

[acoustic yew]

I think that tutorial coverst that you make lobby where players Join and then you all join the Map

[next falcon]

Why does my Multicast only Cast to the server ?

[acoustic yew]

you must Do the multi cast on sever.

Add item to Server must be exacuted on Server .. so first you make Custom event and run on server and then add your Multicast

Clients cant Multicast as mutch as i know

[next falcon]

Like this?

the Clients still do it just for themself

Server do it also just for the server

[brittle sinew]

Widgets aren't replicated.

You can't have replicated variables or RPCs in a widget (well, I guess you can, but they have no effect)—you need to do this replication on a replicated actor or component

[next falcon]

so i need to cast this maybe to Character and do it there ?

[brittle sinew]

If that's where your inventory lives, sure, that sounds like a good idea.

Could you also drive this event on each client when the inventory changes, though?

You'll want to cut down on networked function calls as much as you can, especially if one function call can directly lead to another

[quasi quartz]

Since the PlayerControllers exist on both the server and the owning client, is it possible to call a multicast rpc in a playercontroller? When I try it tells me that Function_Implementation is not a member of Class, but it will work fine if it's not an RPC

[quasi quartz]

I worked it out, it seems you can use server or client RPCs, but not multicast, which is fine for what I am doing

[jolly siren]

That's because PlayerControllers only exist on the server and the owning client as you said

so multicast doesn't make sense

[twin juniper]

i asked before, but i'll ask again since maybe someone knows an answer. Is it possible to pass an image from client to dedicated server without using some 3rd party tool?

[fossil spoke]

You would have to code that yourself in C++

@twin juniper

[twin juniper]

Meh... kinda sad... but thanks for the answer

[thin stratus]

If the image is already in the project, then you can just reference it, but if it's a runtime created one, then not.
@twin juniper You might want to check if you can't just give server instructions how to recreate the image if it's runtime generated.
If it's however loaded by the client, then C++ is probably the way to go

[quasi quartz]

@jolly siren it makes sense in retrospect lol

[thin stratus]

Blueprint "allows" multicasts

However if you tick reliable you crash :D

[quasi quartz]

interesting lol

[thin stratus]

I had the problem when creating an inventory system.
The update UI function on the component needed to multicast due to also being placed on chests that multiple people can access.
Engine didn't really like my multicast on the component of the PC :D

[quasi quartz]

that sounds like a pain to work around :/

after you figure it out lol

[thin stratus]

Na, inheritance :D

Simply made a child class for the player or chest

In one I us a Client call, in the other the multicast

[quasi quartz]

the advantages of experience, I guess

[thin stratus]

Is there a way of disabling steam for a DedicatedServer?

Tried -nosteam but doesn't have any effect

Event changing the serverTarget to bUseSteam=false; makes the server load the files.
is that only affective if I build via Frontend?

[worn nymph]

You tried removing it from the module dependency in the build file . Also disable the plug in inside the editor before packaging maybe ?

[thin stratus]

I want it to be active on the client

Just not on the Server

I once got a message from the SErver itself to use -nosteam

but that doesn't do anything

[thin stratus]

https://puu.sh/yi9uL/cc7ea8a9e0.png

Anyone care to explain me that one?

Just generally curious

[wintry cove]

Why is actors begin play calling when waiting to start is the one that's active?

I am 100% sure it's not going to InProgress

was this a bug in 4.15?

I know for a fact this works in 4.17

[thin stratus]

void AGameMode::HandleMatchIsWaitingToStart()
{
    if (GameSession != nullptr)
    {
        GameSession->HandleMatchIsWaitingToStart();
    }

    // Calls begin play on actors, unless we're about to transition to match start

    if (!ReadyToStartMatch())
    {
        GetWorldSettings()->NotifyBeginPlay();
    }
}

[warped hull]

Is unreal server any good for large scale games?