multiplayer

[hexed rose]

need the "or's" to distinguish between the mouse and the move

[thin stratus]

Not the OR at the bottom left

Only the one at the top right

Sorry if I wasn't clear enough about that

@hexed rose

[hexed rose]

same issue

it initially works... then just stops working after i use the middle click :/

thats the bugg 😐

middle click continues to work after <.<

ok <.< i think i fixed it 😐

disabled the Curson in the Controls and it works <.<

[thin stratus]

Yeah it sounds like an Input problem

Do you set the InputMode to GameOnly somewhere?

If not, might be worth doing in your game levels @hexed rose

[hexed rose]

no <.< it was the "Show Mouse Cursor" in the Player Controller causing the issue :/

[bold cedar]

I have several dedicated servers setup, and I need players to be able to message each other regardless of the server that they are connected to. When player A sends player B a message, I need to notify player B's server of the message. I could make an http request every few seconds from each server to my database, and check if any messages are new, but that doesn't seem too efficient. What is usually done in this instance?

[brittle sinew]

Usually, if you have a persistent connection and message alerts like that, you would use something like a protobuf implementation like gRPC or a websocket connection

Discord runs their events on a websocket :)

[twin juniper]

Oo

[thin stratus]

Actually, things like these are handled outside of the Servers

It's a second service the Player connects to for the chat

[brittle sinew]

Yeah, that's what I meant

I don't believe either are available in UE4 OOTB (I know gRPC isn't; not sure about websockets)

[thin stratus]

Ue4 use it for fortnite i think

To connect it to the launcher chat too

Guess it's somewhere, like all things :P

[tawny parcel]

Has anyone found a class to expose HTTP downloads in blueprints?

[thin stratus]

What do you want to download?

General http stuff is already exposed in some plugins

[cloud ore]

what kind of info should I search for Z axis calculations for isometric style mmo game?

[tawny parcel]

@thin stratus Will be a pak file more than likely, could be a mixture of game files

I found this so far, but it doesnt seem to be exposed in blueprints, or perhaps for a blueprint based project? https://answers.unrealengine.com/questions/352833/download-a-file-to-hard-drive-blueprints-or-c.html

[cloud ore]

something like alibon online's level designs where you can see character interactions happening in stairs ( Z axis )

sorry I'm having language barrier 😃 I cant explain any different

for example one player casting spell to another player who is standing downstairs or down the hill,

should one think about multiplayer side of those systems, is it possible via blueprint?

are there any specific kind of approaches for designing levels for that matter?

[thin stratus]

@tawny parcel generally everything more complex is not bp exposed

@cloud ore images would help? I mean technically that sounds like a math issue?

[tawny parcel]

@thin stratus You mentioned some plugins, can you name a few I can look in to?

[twin juniper]

I want to have a test server, or test map to interact with other pc's in a basic multiplayer match. is it possible to make one of these so steam users can join?

[thin stratus]

@tawny parcel for http requests you might just want to check the marketplace

But i don't know if they allow downloading a pak file

You might really need cpp? Not sure

[rare cloud]

client side inside the tick function of an actor I execute this code :

APlayerController* PlayerController = UGameplayStatics::GetPlayerController(GetWorld(), 0);
APlayerState* PlayerState = PlayerController ? PlayerController->PlayerState : nullptr;

And PlayerState is always nullptr 😢

maybe a PIE issue

[rare cloud]

ok it works now 🤔

[grand kestrel]

Haven't built an inventory before, not expecting any troubles, but since I want something well optimized for a large multiplayer game, if anyone has any resources I should read it would be greatly appreciated

[thin stratus]

@grand kestrel Generally advising to use Components for the Inventory and making sure to think about specific inventory cases upfront

Such as Chests or Hotbar

So you can properly plan the base class and create children for the other actors (chests, workbench, etc.)

[grand kestrel]

Sounds good 😃

I guess there's nothing fancy required with storing it, just a struct array containing each item and the data they use

[thin stratus]

Then your Inventory Component should also handle its Widget

Fancy part about storing is that the Struct should only contain data that changes

Everything that never changes, (name, description, level requirement etc.) should stay in a DataTable

Only things that might change (stack size, damage to the item aka can break, if items can waste how far the process is etc)

And then have the DataTable row as a variable

Then local Clients can pull the data for displaying the item (image, name, level, descirption etc) from the datatable

Second thing is maybe having a second struct that is only for the visual aspect, so only the data the player really needs for displaying the item in it's UI

[stark dome]

You also may need different structs for different types of items

Can make replicating the info messy

You'll need multiple arrays in that case

[grand kestrel]

@thin stratus Thanks so much! That info will save a ton of time

Yeah, there are certainly different types of items

[thin stratus]

For different type of items you would want to maybe use cpp for the structs

That way you can inherit from a base struct

[grand kestrel]

I shall

I normally use CPP, didn't even realize BP can't subclass a struct

[stark dome]

Still are issues with replicating an array with struct inheritance though

You can't have an array of the base struct type because struct pointers can't be replicated

[grand kestrel]

Ah.. does it not replicate properties from the derived struct?

Should I use a UObject in lieu of a struct then?

[stark dome]

I personally use multiple arrays but a uobject sounds cleaner

I wonder what the overhead is like

[grand kestrel]

That was my next question

I know the difference between a C++ class and struct is very minimal

Almost un-noteworthy

But of course there is a lot more to a UObject

[stark dome]

Yeah big difference

But if you have lots of different properties required by different items you'll need a new array for each with structs

[grand kestrel]

Which is a likely case tbh

[stark dome]

Not sure if there is an alternative to the two methods

[grand kestrel]

@thin stratus Can I impose on you for your thoughts regarding using a UObject in lieu of a struct for replication reasons?

[thin stratus]

UObjects don't replicate

So a struct should be totally fine

[stark dome]

I thought you could override some methods to implement replication

https://wiki.unrealengine.com/Replication#Replication_of_Actor_Components_and_Subobjects

[thin stratus]

Yeah but that's more like subobject replication

Generally, UObjects aren't meant for replication

The Actor is taking care of replicating it

So he can stick to the Struct i guess

[rare cloud]

you can replicate an UObject but you always need an actor to replicate it

[twin juniper]

i'm still having an issue where i'm possesing my charcater with an ai controller, and after that i no longer can call a rpc from client. anyone here has expirience with that? maybe someone who is making a dota like game

this is my possesion script

from the post login event

[twin juniper]

the problem i'm having in this setup is that a RPC from client to character BP is not working

while for example a RPC from client to controller BP is working

and my complete game logic is in the character BP

[thin stratus]

Characters can only receive RPCs if possessed/owned

If you have logic that should work even if the AI is possessing the Character, you'll want to move that into the PlayerController

[twin juniper]

so they must be both possessed and owned, ownership is not eniugh?

cry

[thin stratus]

Ownership would be enough I guess

But not sure if that's working with an AI Controller possessing the Pawn

Also, why are you getting the AI Controller from the Spawned Pawn an possess him again?

[twin juniper]

what would be an alternative?

btw, this is a player character

[thin stratus]

Characters have default values for AI Controller and if they should be possessed when Spawned, Placed or both

[twin juniper]

ah, ok, so you're saying that what i'm doing is redundant

[thin stratus]

Correct

If setup correctly, the newly spawned Character should be auto possessed by the AI

[twin juniper]

ok, but that doesn't slve my problem 😦

[thin stratus]

Well, as said, technically you should be able to perform an RPC to a Client Owned Actor

If you have a reference

How are you accessing the Character after the AI posessed it?

"MyOwnedCharacter" I assume?

[twin juniper]

yea

it's a valid variable on client

properly replicated

i don't get any null references, it just silently fails

[thin stratus]

Sounds like it gets dropped

(the RPC)

Well, the clean solution would be doing the RPC in the Controller

[twin juniper]

if i don't give ownership back to player controller with "set owner"

than it complains that the client has no owner over the character

which is expected

but otherwise i get a silent drop... it does seem as a bug

but anyways, it seems i'll have to move all my logic to controller

like you said

thanks for the assisstance

if you by any chance think of some workaround, please do share

[thin stratus]

Are you 100% sure the RPC drops?

No breakpoint called?

[twin juniper]

100% sure, i've tried mutiple times

with different tracing

err, what do you mean by breakpoint?

[thin stratus]

@twin juniper Simple break point or Print String to comfirm

Can always be that the code that you call inside of the RPC is not working

[twin juniper]

nah, checked that multiple times with a printout

this really sucks

i'd have to completely rewrite my game in order to place logic in the controller

[twin juniper]

and all i want is to use AI move to, instead of simple move to, to control my character

that's basically it

epic screwup

[shy nymph]

Does someone know if i have my game compiled as a dedicated server and running steam substeam do i have to have steam open for the dedicated server to host in the steam subsystem. And if yes, do i need to create a "steam server account" thats just there to host dedicated servers?

[thin stratus]

You don't

You only need to copy the steam binaries from the engine third party folder over to the servers binary directory

[next falcon]

Is there any Pro with sessions who can help me with my sessions problems ?

[twin juniper]

this is the link to my code https://pastebin.com/uwFG7Q3V
https://pastebin.com/H7x4dGZ6
https://pastebin.com/Rzc04XFC
https://pastebin.com/BLgiw2Br

i using gamesparks i only can make work using bp

and i want to make in c++

[tawny parcel]

Is anyone able to try and build the class listed by RVillani in this post? https://answers.unrealengine.com/questions/352833/download-a-file-to-hard-drive-blueprints-or-c.html

I'm using 4.17.2 built from source, blueprint project with C++ classes and I can't get it to work even after following his intructions. Curious if I am doing something wrong...

[thin stratus]

@twin juniper And the problem is?

THe code looks like it would work

@next falcon Posting your actual issue would help instead of asking for someone

[tropic moat]

works for me @tawny parcel

[thin stratus]

@tawny parcel Can you tell us what your issue with that is?

Ah, nvm, @tropic moat your turn

[next falcon]

if i create a session in editor it works fine but if i package in every way it keeps crashing.. any help ?

[thin stratus]

Post information about your crash

[tawny parcel]

@tropic moat Hrm... I wonder what I am doing wrong

[thin stratus]

In general, PLEASE post all the information you can get @next falcon

There are logs that you can view

Build for Developer not Shipping and check those

[twin juniper]

when i try start the game from standlone the game crash

[tropic moat]

any compilation errors ? @tawny parcel i had to add few includes

[thin stratus]

@twin juniper What's the call stack. Same goes for you

We can't debug your issues if you don't give us information.
That's like asking "Why is my oven not working?"

You would have 0 idea

[tawny parcel]

@tropic moat I'm getting a bunch, which includes did you do? I had added #include PlatformFileManager but thats it

[next falcon]

]LogWindows: Error: Assertion failed: NewWorld [File:D:\Build++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Engine\Private\UnrealEngine.cpp] [Line: 10494]

[thin stratus]

@next falcon Can you maybe post the whole crash log into http://hastebin.com ?

[tropic moat]

#include "Misc/Paths.h"
#include "HAL/PlatformFilemanager.h"

@tawny parcel

you can see what you are missing by reading compiler errors

#include "HAL/PlatformFile.h"
may also be required

[twin juniper]

this is error https://pastebin.com/uvKdqFh3

[next falcon]

https://hastebin.com/hujeropema.md

[thin stratus]

@twin juniper Hm, that's a weird empty log. You don't have editor symbols installed, do you?

(have to select that when installing an engine through the launcher)

@next falcon This looks like a problem with your map names

You have one and the same map name in 2 different locations

Maybe a redirector?

LogPackageName: Warning: Found ambiguous long package name for 'TestMap.umap'. Returning '/Game/MyContent/Maps/TestMap', but could also be '/Game/ThirdPersonBP/Maps/TestMap'.

If you actively moved it (or in general move files) make sure to rightclick the content folter (top most one) and click "Fix up redirectors"

Because UE4 is not direclty applying changes, but saves them as redirectors as a linker between old and new file

[twin juniper]

nop my engine is compiled by the source

[next falcon]

ill try that thanks

Another problem with my sessions:
If i package everything and try to start a session and enable lan it creates a session but my other PC can't join because the ping is over 9999 but its Lan ? Whats the problem here ?

and if i don't use lan and use Steam instead i can't find it with my other PC.. How to fix that?

[twin juniper]

the only error i have its game crash

i think i doing something wrong

i try pass i have in bluprints to c++

my gamespark connection works in blueprints when i try in c++ my game crash

i using gamespark Ubject

and the ducomentation is litly confuse

[next falcon]

@thin stratus doesn't help 😦

[twin juniper]

can someone help-me

the link for documentation https://docs.gamesparks.com/tutorials/game-engine-integrations/unreal-cpp-quick-start.html

i want use the GameSparks Object

[cerulean rapids]

Hey guys n galls, just a quick question: What would be the best way to save numbers in players on a multiplayer sever that will persist through levels. example: I have players join a multiplayer lobby, they are given a number based on their slot, i then want to use that number when the game starts on the new level to spawn and possess these players into their correct characters using post-login. I cant just store it in their player controllers because as you know controllers are changes cross level. :p cheers in advance.

[twin juniper]

can someone help-me

@thin stratus can see my code to try find what i doing wrong

@thin stratus the problem the game crash

in stanlone

[twin juniper]

how do i attach a camera to a spawnd pawn?

a newly spawned pawn, and gain control over that camera

this is the error

great error

did anyone manage to figure out why does the camera stop following the character when it is possessed by an AI Controller?

or stops reacting to input

the bp works great but in c++ the game crash

no logs only this error

[twin juniper]

does anyone know what this error means?

EnableInput can only be specified on a Pawn for its Controller

@cerulean rapids OnPostLogin is not called after a seamless server travel

[cerulean rapids]

Yeh i just solved it using some event i cant remember its name, like, controller swap

Im in bed on my ipad now :p

[twin juniper]

In blueprints the way to "hack" it is to have an event on the players HUD blueprint that calls a "FakeLogin" event and you should do all your logic thete

[cerulean rapids]

The event i used referenced the the controller he switched from when joining the new level, so then i just cast to it and boom

[twin juniper]

The player Controller Array within your game mode doesn't change after a travel, so you can use the pcs index in that array as your "ID"

[cerulean rapids]

On the next level. Command, i set each controllers id variable from the controller index in the gm array, yeh

[nova thistle]

I'm struggling with replication. I'm using the 'owner no see' and 'owner only see' flags to have a different component shown for the player's local weapon vs. remote players' weapons

but for some reason, the client can still see his own 'remote' weapon

I think I'm not setting the owner correctly when I spawn it on the server, but I'm not sure what to set it to

[twin juniper]

heyo, is there any resources out there that explain how to impliment a dedicated server multiplayer gamemode. Thanks!

[thin stratus]

@twin juniper What would that be?

There are resources about gamemode and dedicated server

[twin juniper]

Im sorry I should have been more clear. Resources about how dedicated servers are used in unreal engine. I have been doing a tutorial series about replication and multiplayer via server hosting by a player but I cant find anything about how dedicated servers work

[rancid current]

ey all got a problem o.O I'm trying to trigger an event as a client, and Im replicating it with Run On Server but the server ignores all clients, if the server triggers the events it works and clients can see it, but clients are totally ignored when going though Run On Server event

https://gyazo.com/3c7bec76527318300eaa102e85c16427

@thin stratus ideas? thx

and if I run it on multicast , the event trigger just for the owning client not for others too lel

[dusty sleet]

@rancid current maybe try adding a multicast event and have the mc event do the logic.. but keep your server event and have IT run the mc event

[rancid current]

tried it

it goes through the mc and stops when going though server

[dusty sleet]

you tried E press > Server event > MC event

[lean river]

@rancid current is this some kind of actor?

[rancid current]

that is a door BP actor yes

[lean river]

Actors cant send rpcs unless he have valid owner with netchannel

[rancid current]

oh now that u mention earlier i tried to print out its owner and it came out null

[lean river]

Yeah you need valid owner which exist on server and client too like player

Or gamestate

[rancid current]

and how would I go about fixing that then? The Door actor is simple, and when the player actor overlaps with it, it gives it the input to use when input is pressed a timeline fires off and updates the rotation of the door

how to give it owner? o.O

[thin stratus]

@twin juniper You simply build one with the source version of your engine version

@rancid current You don't do the E press in the door

You do it in the controller or character

And then directly rpc

[rancid current]

so i need to run the E input from the player and run a function on the door then?

[thin stratus]

And then you are on the server and you can interact with the door

Yus

[rancid current]

okii got it

[thin stratus]

You can also set the owner on overlap of the door (server only with authority switch) but that only allows one user at a time

[twin juniper]

Thanks ❤

[rancid current]

I tried on event beingplay but guess not?

[thin stratus]

Na players probably aren't connected then anyway

[lean river]

Yup and really bad design. Most case really unsecure to allow rpcs to any actor.
So just do interaction in pc or char like Exi mentioned

[thin stratus]

And owner can only be one at a time

[rancid current]

true that okii thx guys got enough info will see what i can do 😃 thx lots!

[thin stratus]

We have them enabled in the ball the player can shoot. But that can only be carried by one person at a time

[rancid current]

worked nicely 😄 thanks all 😃

Also if someone knows since im here, i deleted some of my blendspaces by accident while mass deleting xd anybody knows how to restore them ?

[thin stratus]

Use source control in the future? :P

[shy nymph]

@thin stratus on topic for dedicated servers and steam subsystem you told my couple of days ago to just copy the binaries from engine to the server, but im not sure i'm quite doing this right, still getting onlinesubsystemshutdown

is this even the correct location?

[thin stratus]

I meant the STEAM binaries

That are somewhere in Steamworks in the ThirdParty folder of the engine

@shy nymph

Not the game libs from the editor

[shy nymph]

oh okay that makes sense, but the location is correct?

yea okay that worked xD

but im still getting this weird " Server Setting ,SESSIONFLAGS:683 overflows steam SetGameTags call" warning im sure has nothing really todo with that but don't quite know what to make of it either

[twin juniper]

is someone uses gamespark api in c++

with gameskark object

[twin juniper]

@thin stratus can we like...

pin that?

^That

lmao

[cerulean rapids]

Any1 have an idea why this is causing all players to bug out and unpossess everything, (and just float in the middle of the map) instead of taking controll of their characters when some1 joins and is told to possess their character? The variables being set from the OnSwapPlayerControllers event and its cast are all working. 2nd player logs in and it prints Slot 2 ArcheryController1 and then breaks every1.

the host logs in and controlls his character fine, but as soon as another player connects, it breaks.

https://i.imgur.com/hSgnTSC.png imgur link if image is too small

Mainly i just don't understand why the last section isnt working. I Have a working reference to player 2's slot. his controller, and the pawn that he should possess. but when it gets triggered, everything breaks.

[thin stratus]

Few things I don#t get

ServerRPC in the GameMode?

GameMode has only a Server Version

No RPC required (wouldn't work anyway)

Then why are you doing it so complicated to spawn two players?

Add the new Controller to a PlayerController Array on SwapPlayerController

And iterate over this once everyone has joined to spawn their characters

Also, instad of Branch on Branch, simply use "SwitchOnInt" on the Index of the for each loop for that array

or "Select" with the integer as variable

Then you only need one possess node

[cerulean rapids]

some interesting points thankyou, i am doing it this way because i needed to remember the character slots from the previous level, assign the player who was in slot 3 to character 3, not just assign the third person to connect to the level to character 3

[thin stratus]

Well then make a TMap

Or just an array actually again

And insert the New Controller into the index that you saved in the old one

[twin juniper]

ssup

@thin stratus

😛

[thin stratus]

So you got an SkyDome Actor that has a float which is set to Replicate + Actor being replicated?

And it's placed in the level?

[twin juniper]

so this is strange

I changed it to RepNotify just now

and its working?

the repnmotify function... all its doing is print string

Is that... normal? lol

now its working right

[thin stratus]

It should work without repnotify too

[twin juniper]

I think so too

im going to change it back and try again

@thin stratus ok thats weird

its almost as if doing that

like got rid of whatever was there

lol

just switching to rep notif, aand back again

just fixed it

[thin stratus]

Engine bug maybe

[twin juniper]

yeah idk

[cerulean rapids]

@thin stratus im just playing around to figure things out 1 at a time and i am truly perplexed by this...

what should be happening is: Player1 aka Char1 being spammed in chat every 0.2 for 0.1 seconds, which works

but

[thin stratus]

two different exec lines

[cerulean rapids]

the green text should only happen once

[thin stratus]

What ever you call there

[cerulean rapids]

and also why is Player1 missing from it

[thin stratus]

Is calling before the Char is spawned

Yeah the Char is not spawned yet

It's null and so the name is empty

[cerulean rapids]

but characters are set to spawn on begin play, that happens before login - no?

[thin stratus]

Not before SwapPlayerControllers

That's why I told you to save the controllers

And spawn their chars later

[cerulean rapids]

hmm ok, however post login happens just after a player joins right

[worthy wasp]

hey guys - happy monday!

I have an ATTACHED UParticleSystemComponent on my character class. I am having the HARDEST TIME getting it to play on networked clients (Dedicated Server) ....

I'm turning it on locally, and then a server RPC to Component->Activate()

It plays locally no problems - i cant see it on clients.

I have the Component itself set to replicate
I'm replicating the Beam start/end points on tick when this component is activated with Replicated FVectors - thats not an issue.

I've troubleshot the locations that they SHOULD be at - and they spawn on networked clients with DebugSpheres at the replicated locations i'm setting....

I cant get this beam to activate 😦

[thin stratus]

Usually you don't need to have the comp to replicate

As you already say, two FVectors with RepNotify to set the start and end (maybe a struct to only have one variable) is enough

And activating should happen through repnotify or RPC

[worthy wasp]

i would have though i would need tha treplicated - as i'm changing the TEMPLATE out with a few different "weapons" that are the particle system itself

[thin stratus]

If you change the template you need to replicate the change

[worthy wasp]

ok let me try repnotify

i'm NOT doing that

[thin stratus]

Not the component

Particles are FX

FX is client side

[worthy wasp]

i'm ALSO not replicating the change

i'll do that

[thin stratus]

So if you do anything to it, just keep in mind you have to replicate changes as well as values and activation

By hand

[worthy wasp]

understood

thanks cedric

[thin stratus]

So Start/End, Activate/Deactivate, Changing Template

Same goes for Meshes for example

No biggie

[worthy wasp]

@thin stratus - i was using a SWITCH statement in my funciton that changes the template - based on an array in the Character class that houses the different particles to use for the component.

I've replicated this array - and the uint8 that is switching it is passed through as arg.... but i still have no particle showing up 😦

i'm going to debug string the template that SHOULD be playing - see if its actually setting - but does this switch statement work in ar eplicated funciton with the arg passed through?

maybe i have to switch locally - and pass in the actual particle system as an arg - to correctly set it on server

[twin juniper]

@thin stratus cedric... maybe you might know why this does this or maybe how i could cover it up? Is there some sort of delegate function for when its loading those tiles? https://drive.google.com/file/d/18vq0PhyZxIYbSYC-S864tGjopNU7F3y1/view?usp=drivesdk

Also

maybe somoene lese knows

tried to google it lol

[worthy wasp]

@thin stratus - i switched this up so it doesnt use a switch statement anymore..... but it has 0 effect.

EVery RPC is a passed arg setting the settings on the ParticleSystemComponent..... eveyrthing plays fine locallly but not on the other clients - they have 0 display of the particle beam.

can you take a look at this code that sets up the beam's settings and see if something is out of whack? My DebugSpheres are showing up perfect on the network clients - the beam doesnt display.

{
    UKismetSystemLibrary::DrawDebugSphere(GetWorld(), StartPoint, 32.f, 8, FColor::Green, 2.f, 1.33f);
    UKismetSystemLibrary::DrawDebugSphere(GetWorld(), ImpactPoint, 32.f, 8, FColor::Blue, 2.f, 1.33f);

    QBeamComponent->SetVectorParameter("beamEnd", TargetPoint);
    TArray<FParticleEmitterInstance*> QBeamEmitters = QBeamComponent->EmitterInstances;
    for (int32 i = 0; i < QBeamEmitters.Num(); i++)
    {
        if (QBeamComponent->IsActive() && QBeamEmitters[i])
        {
            if (QBeamEmitters[i]->bIsBeam)
            {
                SetBeamPoints(i, SourcePoint, TargetPoint);
            }
        }
    }
}

void ACharacterBase::SetBeamPoints(int32 Index, FVector SourcePoint, FVector TargetPoint)
{
    QBeamComponent->SetBeamSourcePoint(Index, SourcePoint, 0);
    QBeamComponent->SetBeamTargetPoint(Index, TargetPoint, 0);
}

Update beam is done both locally as well from server - from my FVector's onRep function

i think ij ust found it

my debugstirng is saying CLIENT inside of the for loop (i added it after posting this code)

which tells me my server isnt either seeing if QBeam is Active, or cant recognize the QBeamEmitters array there

[twin juniper]

LolL

[tacit hazel]

does UE4 only transmit data for Replicated objects when they are changed? I am wondering for performance reasons

[fossil spoke]

@tacit hazel Yes the engine optimises it for you in that way. Only when an Replicated variable is changed does it get replicated.

[tacit hazel]

awesome

thanks for the info

[unborn nimbus]

If you change a replicated variable on the client, I know it does not update to the server and other clients but does it stay on that client?

[tacit hazel]

I beleive it stays until overwritten by the server, but someoe feel free to correct me if im wrong

@unborn nimbus

[unborn nimbus]

That's what I thought

[twin juniper]

is it possible to get a reference to a controller of the character that represents a remote player

i can get a reference to a character, but all the important i need to access is in his controller

and "GetOwner" returns null

[fossil spoke]

The Server has access to all Controllers.

If you want Clients to be able to share information about eachother, use the PlayerState instead.

You may need to rethink your design. Utilise the classes for their intended purposes.

[twin juniper]

so remote controller is not possible to reference, but i would be able to refence remote player state

[fossil spoke]

All Players have access to every other Players PlayerState

PlayerControllers only exist on the Server and the Player that owns that Controller

[twin juniper]

ok, i understand... thanks for the explaination

could i share this info through game state?

[fossil spoke]

Yes, GameState functions similar to PlayerState.

It is replicated to all Clients

[twin juniper]

like if i kept a list of players

ok, i'0ll go that way, thanks

[fossil spoke]

The GameState holds an list of all PlayerStates connected to the Server

PlayerArray

[twin juniper]

heh, yeah, i didn't know about the player state, so i made a sperate list....but it's ok...will do

😃

[fossil spoke]

Good luck 😃

[shy nymph]

hey everyone, i feel like what i am trying to do is like crazy complicated cause i can't find any good materials on how to do it online 😦

i created a dedicated server running in the steam subsystem, but i have the problem of after acutally joining the session my server created to travel to the correct map

since i can't have the map "listen" it does not autmaically travel to the correct map

and all tutorials speak of "open level" with the IP Adress of the server as level name, but since i'm trying to join the blueprint session result of an remote server i don't know the ip of i don't know how to correctly travel to the servers map

[thin stratus]

It should travel to the Server with the JoinSession node

If you use c++, then you need to call ClientTravel on the URL that you can get from the SessionResult

In both cases, you would connect to the server and travel to the map

@shy nymph

[shy nymph]

hm well at the moment it doesn't, it behaves like creating a session open level without "listen", on the "Join session" it connects successfully but then does nothing , and if i open level just the same map the client is there alone (was sure about that not working anyway but though i give it a try) :(

i'll get back to you on that, right now i can't even connect to my own dedicated server with steam integrated, starting a dedicated server project from scratch now since it worked at somepoint but steam integration seemed to make it stop working

i guess steam dedicated server and client on one machine isn't that test friendly

[shy nymph]

Yeaa.... so following this tutorial

https://wiki.unrealengine.com/Dedicated_Server_Guide_(Windows_%26_Linux)

i created a dedicated server, starting the server on the same machine as the client works fine, clients can connect. I Put the dedicated server on another machine in my local network changed the ip to connect and it works as well

as soon as activating the steam subsystem i can't connect anymore either way u.u

rebuilded everything, no steam on the second pc but steam dlls copied in the binaries folder, either server nor client throw any warnings nor errors -.-

[shy nymph]

This is the log on client side

this the log on server side

[cerulean rapids]

Hey guys, quickly; PlayerState's exist through levels right? so if i cast to each playerstate and give them all a number in one level, when i try to retrieve those numbers in another level it would work? 😃

[thin stratus]

No

In an normal environment, only the GameInstance survives Level Changes

You can however perform SeamlessTravel and use the PlayerController to save that number

The PlayerController will be valid in the GameMode for "OnSwapPlayerController"

and that gives you new and old one

[cerulean rapids]

ah yes, i had that working last night, although i cocked some things up, thought id have another look at playerstate's Thanks friend.

Also, the host never triggers eventlog in correct? only his friends travelling.

[shy nymph]

i mean... common... am i the first person to want a dedicated server over the steam subsystem? 😦 why is there like no information out there about that u.u

[bitter oriole]

I think some people here have done it

Though dedicated servers indeed are something many games don't bother doing anymore

You should try setting up a real Steam account on both machines

[shy nymph]

yea and scking cause of it, peer to peer when you want a competetive game is garbage

hmm maybe... i dunno, that doenst seem to be the error, no message about this

[bitter oriole]

Might as well get that out of the way

I'm not sure how Steam can even handle matchmaking with a non-user

[shy nymph]

well im not using the steam matchmaking, im connecting right through ip atm

[bitter oriole]

Just doing "open ip" in console ?

[jolly siren]

most people use sessions with steam dedicated server

[shy nymph]

@jolly siren i tried to as well but then got stuck with the fact that after joining the session im not been taking to the server map and how to solve that again like no information out there -.-

@bitter oriole yes for now, just to see if i can get any connection

[jolly siren]

plenty of info out there. Look at ShooterGame

[shy nymph]

shootergame is no dedicated server project is it?`

[jolly siren]

void AShooterGameSession::RegisterServer()
{
    IOnlineSubsystem* OnlineSub = IOnlineSubsystem::Get();
    if (OnlineSub)
    {
        IOnlineSessionPtr SessionInt = Online::GetSessionInterface();
        if (SessionInt.IsValid())
        {
            TSharedPtr<class FShooterOnlineSessionSettings> ShooterHostSettings = MakeShareable(new FShooterOnlineSessionSettings(false, false, 16));
            ShooterHostSettings->Set(SETTING_MATCHING_HOPPER, FString("TeamDeathmatch"), EOnlineDataAdvertisementType::DontAdvertise);
            ShooterHostSettings->Set(SETTING_MATCHING_TIMEOUT, 120.0f, EOnlineDataAdvertisementType::ViaOnlineService);
            ShooterHostSettings->Set(SETTING_SESSION_TEMPLATE_NAME, FString("GameSession"), EOnlineDataAdvertisementType::DontAdvertise);
            ShooterHostSettings->Set(SETTING_MAPNAME, GetWorld()->GetMapName(), EOnlineDataAdvertisementType::ViaOnlineService);
            ShooterHostSettings->bAllowInvites = true;
            ShooterHostSettings->bIsDedicated = true;
            HostSettings = ShooterHostSettings;
            OnCreateSessionCompleteDelegateHandle = SessionInt->AddOnCreateSessionCompleteDelegate_Handle(OnCreateSessionCompleteDelegate);
            SessionInt->CreateSession(0, NAME_GameSession, *HostSettings);
        }
    }
}```

straight from shootergame

[shy nymph]

kk maybe i should check that out

is this subsystem independent or is this already steam subsystem?

[thin stratus]

Not 100% independent, but it's very similar in all cases as the Subsystems all use the same interface

[shy nymph]

So i opened the "shootergame" sample project, when a player in the menu hosts a game, thoose are dedicated servers? nah @jolly siren

[jolly siren]

obviously not

you have to build the dedicated server

[shy nymph]

yea but wheres the information now? if i have to add dedicated to this and steam then im adding exactly the two parts that are not working for me right now

[thin stratus]

Well, Steam in general doesn't work straight forward with dedicated servers

Mainly due to Epic not properly setting things up

The warning about overflowing settings seems to not matter i think (at least we host even with it)

But for example authentication doesn't work

And direct connection via IP also not

As the Server only works over the steam sockets

[twin juniper]

@thin stratus steam works but the authentication doesnt

@thin stratus also i think all u have to do is include steam/steam_api.h or whatever the header is

and you can request a session ticket directly in that header

and submit it to the server

to do authentication

i did it once lol

[shy nymph]

what exactly you mean by authentication? and so created sessions should be joinable with join session the ya? and it should travel me automatically to the server map? cause thats what is was strugeling with
it worked to join sessions but i couldnt get to the server map and the i tried ip direct connect to see if i can get at all on the server

*then ya?

[jolly siren]

You had it setup incorrectly then. Which is why I suggested looking at shootergame. It has all of the session stuff setup correctly.

Steam authentication is for ensuring that only steam users can get on the game.

[twin juniper]

@thin stratus hey cedric i got a question

I've been wondering how to handle this:
Player A connects, chips down a tree (Its an ISM)
PLayer B connects later, he still sees the tree (Client sided, but when he walks into it theres no collision because collision is 100% server sided)

SO the question is:
How does Player B login and get the changes?

Same thing with things like character customization... If player A created a blue character with blue skin, but the default is just plain white, when player b connects he will see white skin

So the question is how do we take into account late blooming players...?

[jolly siren]

replicate the skin color

[twin juniper]

@jolly siren yeah you could replicate it but it still would need to be set or bound

like the FLinearColor would need to be bound to that materials parameter

[shy nymph]

@jolly siren yea i will try to figure it out then, joining worked but i wasn't been transportet to the server on join, any idea why that could be?

[jolly siren]

because you didn't set it up correctly

check the URL your ClientTravel is traveling to

[shy nymph]

well i did it completly in blueprint so there was no clienttravel

[jolly siren]

yeah I don't really use bp for anything of importance. Especially not the foundation of my multiplayer

Regardless, there is still a travel happening under the covers. If not then you are doing it wrong

@twin juniper so do that in OnRep

[shy nymph]

@jolly siren well probably xD yea ill check out the shootergame

[twin juniper]

@jolly siren i thougt onrep is only calledf when that variable is set

on the server

if its just being replicated from server to client

is that still the same thing?

would it still call OnRep

[jolly siren]

OnRep is called when the replicated variable arrives to the client

[twin juniper]

hmm

okk

So essentially if i become net relavant to your character

it will call that ONRep

and there i could set the material info

on the client

right?

[jolly siren]

yes, on the client

[twin juniper]

ok

So heres a question tho

ACharacter => Player A and Player B both have a replicated FLinearColor called "SkinColor"
Player A logs in later, walks over to Player B, and OnRep is called... Is this being called on Player A's character? Or on Player B's character? And If we call from OnRep, SetSkinColor(SkinColor); would it be setting it on Player A or Player B

[jolly siren]

Client A and B's version of Player B's character

assuming you replicate the property to all clients

[twin juniper]

oh

okay

makes sense

just wanted to validate lol

[jolly siren]

np

[solemn holly]

hi. when i try to launch my project having the steam plugin enabled i get an Unknown Error. Does someone know how to fix it? Thank you a lot!

[pallid mesa]

Unknown error.

Nice

Give logs

[solemn holly]

LogPlayLevel:   Total build time: 2,20 seconds (Local executor: 0,00 seconds)
LogPlayLevel: Took 2,3322047s to run UnrealBuildTool.exe, ExitCode=5
LogPlayLevel: ERROR: Command failed (Result:5): E:\Archivos de programa\Unreal Engine\UE_4.18\Engine\Binaries\DotNET\UnrealBuildTool.exe SteamMPTutorial Win64 Development -Project="E:\Programación\Unreal Projects\SteamMPTutorial\SteamMPTutorial.uproject"  "E:\Programación\Unreal Projects\SteamMPTutorial\SteamMPTutorial.uproject" -NoUBTMakefiles  -remoteini="
E:\Programación\Unreal Projects\SteamMPTutorial" -skipdeploy -ini:Game:[/Script/UnrealEd.ProjectPackagingSettings]:BlueprintNativizationMethod=Disabled -noxge -NoHotReload -ignorejunk. See logfile for details: 'UnrealBuildTool-2017.11.28-20.14.46.txt'
LogPlayLevel:        (see C:\Users\PcCom\AppData\Roaming\Unreal Engine\AutomationTool\Logs\E+Archivos+de+programa+Unreal+Engine+UE_4.18\UAT_Log.txt for full exception trace)
LogPlayLevel: AutomationTool exiting with ExitCode=5 (5)
LogPlayLevel: Completed Launch On Stage: Build Task, Time: 2.501648
LogPlayLevel: BUILD FAILED
PackagingResults: Error: Launch failed! Unknown Error```

[twin juniper]

uh

did someone ping me?

=.=

Anyone know if htere is a event which is called while tiles are loading? For world composition

[cerulean rapids]

hey guys, is there an event that calls when all the clients have loaded in from seamless travel are are ready to recieve replication? if not, what's the best way to check?

[twin juniper]

does anyone know if move to location can be called from client?

or it is server only

simple move to location can be called from client

Uhm

but it seems when i try to get a reference of the ai controller on client. it returns null

If you are moving it from the AI behavior tree

the behavior tree is what u should be using

because its all server authoritative

i'm using an ai controller on a player character

for point and click movement

[brittle sinew]

AIControllers only exist on the server.

[twin juniper]

christ

this is impossible

not really lol

i setup an entire AI system on my own, then scrapped it because i realized i dont have the networking skills to replicate as many actors as i wanted with AI on them

all u need is these 3 things

AI Controller, Behavior Tree, and a Blackboard

i just want to use "move to location" on a player character

Blackboard is essentially a TMap it seems like

i'm not even doing ai

dont use that

its really really bad habit imo

what is?

everyone says "use move to" or "Simple move to location"

but i honestly think u should be using the 3 things i listed

because those other functions... in my opinion... should be depcrecated

they are very misleading

the move to location is all i need honestly

but now i find out that it can only be called server side, which is kinda disturbing

why should aclient be able

to move a replicated actor

?

it shouldnt

that would be incredibly broken

and overpowered

imagine if u could go into cs go and just move other playuers

as a client

then they should have made "move to location" available to player control,ler

why?

it's a shitty thing that it doesn't exist

Player controller

is only on a local client and the server

it is not shared between other clients

honestly its a good way to hide ur data

imo

if u dont want other players to know certain things

because you have "simple move to" and all i need is a "simple move to" which gives a feedback if it succeeded or not

in what world would u only need to just move to a location though

i mean unless ur doing #aec-visualization

[bitter oriole]

@twin juniper Multiplayer development is very hard, as most people will usually tell you. If you're unfamiliar with UE4 it's better to start with something simpler to learn the concepts first.

[twin juniper]

i'm very familiar with all the concepts

tell me what you're interested in?

[bitter oriole]

An important concept is that "player controller" represents the player itself (typically, its inputs) while the character represents the moving object

[twin juniper]

ok stop here

there "simple move to location"

and there is "move to location"

simple move can be called ona player controller

move can be called ona ai controller

simple move doesn't give feedback if the path to destination exist

move does give feedback if the path to destination exist

Can we please

conclusion: i want to use move instead of simple move on a player controller, why can't i iuse that?

deprecate those nodes

lel

those things are like... so misleading for AI

Ok @twin juniper lets talk about

what ur actually trying to do

and then find ount the correct way of doing it

You aren't JUST trying to move something

because if u were

i need help to convert a bp to c++

u would just use SetActorLocation()

its gamespark object

https://youtu.be/8cLk79Up32I

i only can make work with b+

bp

okay yeah i see

I guess that is literally the only time you would ever need to use SimpleMove or MoveTo location

point and click

is in a RTS style top down click to move game

yeah

Then all u need to do is call that function on an RPC

i need to know if i can reach some part of the map

thats a pathfinding issue

that's why i need move to location, not simple move

i think there is a method for it in UNavigationSystem

i think u can pass a FVector into it

and it returns whether or not its navigable

i forgot the function name though

that prolly wouldn't work

even if it existed

how would it know the setting on my movement component?

like max walkable slope

ah nevermind

it does exist

also i gtg

food

dinner

lel

[cerulean rapids]

what's a quick way of taking info from client side to server, just want send a ready check to the gamemode from client after its repnotify triggers.

[fossil spoke]

RPC?

[cerulean rapids]

so if a client runs a -run on server event, it will simply work?

if it helps, what i am trying to do is detect when all players have loaded in after a seamless travel and are ready to replicate/do work.

[fossil spoke]

Yes Run On Server events are an RPC from Client to Server. So long as they are called from an Actor that has an NetOwningConnection (the clients locally owned PlayerController for example) it will work fine.

[junior tree]

any talk on fortnite and how to build/manage large scale dynamic environments+netcode for 100 players and stuff?

[wary willow]

@junior tree There will be plenty of that when 4.19 comes out

[junior tree]

great! Thanks

[long wharf]

Hey guys quick quistion is the server target the same in 4.18 as in 4.17, Cannot find a updated posts

[twin juniper]

How do people deal with the fact that reverb gets applied to VOIP chat by default and no way to change it since the class isn't exposed to BP

Anything solid on making VOIP an actual sound component in the world would be great

[tawny parcel]

Anyone know how to run frontend profiles with different folder excludes?

[worn nymph]

@long wharf yes it is

[twin juniper]

when i try launch my game spark api by the code i have this error Dump File: UE4Minidump.dmp : F:\Unreal Projects\TheLegendsOfArthur\Saved\Crashes\UE4CC-Windows-5A4E0BCB48E722F301143A97F6441855_0000\UE4Minidump.dmp
Last Write Time: 29/11/2017 12:30:21
Process Name: UE4Editor.exe : F:\UnrealEngine-4.18.1-release\Engine\Binaries\Win64\UE4Editor.exe
Process Architecture: x64
Exception Code: 0xC0000005
Exception Information: The thread tried to read from or write to a virtual address for which it does not have the appropriate access.
Heap Information: Not Present

my code https://pastebin.com/uwFG7Q3V
https://pastebin.com/H7x4dGZ6
https://pastebin.com/Rzc04XFC
https://pastebin.com/BLgiw2Br

[bitter oriole]

Have you tried debugging ?

[twin juniper]

yes and i can´t find the problem

only crash when i use the standlone

[bitter oriole]

What's the call stack ? You have a UE4Minidump.dmp file ready to go

[twin juniper]

yes a have the UE4Minidump.dmp

[bitter oriole]

So have you tried debugging it ?

[thin stratus]

dmp file + pdb file gives you the stack etc

If you didn't know that yet

[twin juniper]

this is the log when i run the dump file in visual studio

https://pastebin.com/Hrae8EZt

UE4Editor-TheLegendsOfArthur-1331.dll!TArray<TScriptDelegate<FWeakObjectPtr>,FDefaultAllocator>::RemoveAllSwap<<lambda_91e272c2e6003ae2685cd0d06095ff3e> >(const TMulticastScriptDelegate<FWeakObjectPtr>::CompactInvocationList::l2::<lambda_91e272c2e6003ae2685cd0d06095ff3e> & Predicate, bool bAllowShrinking) Line 1983 C++
UE4Editor-TheLegendsOfArthur-1331.dll!TBaseDynamicMulticastDelegate<FWeakObjectPtr,void,bool>::Internal_AddDynamic<ATheLegendsOfArthurGameMode>(ATheLegendsOfArthurGameMode * InUserObject, void(ATheLegendsOfArthurGameMode::*)(bool) InMethodPtr, FName InFunctionName) Line 1140 C++
UE4Editor-TheLegendsOfArthur-1331.dll!ATheLegendsOfArthurGameMode::BeginPlay() Line 30 C++
UE4Editor-Engine.dll!AActor::DispatchBeginPlay() Line 3160 C++
UE4Editor-Engine.dll!AWorldSettings::NotifyBeginPlay() Line 187 C++
UE4Editor-Engine.dll!AGameStateBase::HandleBeginPlay() Line 177 C++
UE4Editor-Engine.dll!UWorld::BeginPlay() Line 3505 C++
UE4Editor-Engine.dll!UEngine::LoadMap(FWorldContext & WorldContext, FURL URL, UPendingNetGame * Pending, FString & Error) Line 10679 C++
UE4Editor-Engine.dll!UEngine::Browse(FWorldContext & WorldContext, FURL URL, FString & Error) Line 9948 C++
UE4Editor-Engine.dll!UGameInstance::StartGameInstance() Line 438 C++
UE4Editor.exe!FEngineLoop::Init() Line 2726 C++
UE4Editor.exe!GuardedMain(const wchar_t * CmdLine, HINSTANCE * hInInstance, HINSTANCE * hPrevInstance, int nCmdShow) Line 153 C++
UE4Editor.exe!GuardedMainWrapper(const wchar_t * CmdLine, HINSTANCE__ * hInInstance, HINSTANCE__ * hPrevInstance, int nCmdShow) Line 134 C++
UE4Editor.exe!WinMain(HINSTANCE__ * hInInstance, HINSTANCE__ * hPrevInstance, char * __formal, int nCmdShow) Line 210 C++
UE4Editor.exe!__scrt_common_main_seh() Line 253 C++
kernel32.dll!00007ff841471fe4() Unknown
ntdll.dll!00007ff843eaef91() Unknown

this is in stack of my visual studio

[bitter oriole]

So what are you doing in ATheLegendsOfArthurGameMode::BeginPlay line 30 ? That line crashes the game

Well that line or the few lines around it

[grand kestrel]

Please apologize to your game mode for giving it that prefix 😐

[twin juniper]

i can´t find why is crashing

[thin stratus]

@twin juniper Answer the question :D

Show what you do in line 30 of your gamemode

[twin juniper]

ok

void ATheLegendsOfArthurGameMode::BeginPlay()
{
UTheLegendsOfArthurInstance* GSI = Cast<UTheLegendsOfArthurInstance>(GetGameInstance());
if (!ensure(GSI != nullptr)) return;
//Set the OnAvailable delegate
if (!UGameSparksModule::GetModulePtr()->IsInitialized()) {
GSI->GSObj->OnGameSparksAvailableDelegate.AddDynamic(this, &ATheLegendsOfArthurGameMode::OnGameSparksAvailable);
//Disconnected the module just incase it's connected (Refresh)
GSI->GSObj->Disconnect();
//Connect module
GSI->GSObj->Connect("","");

    /*gameSparks = NewObject<UGameSparksComponent>(this, FName("GameSparksComponent"));
    if (!UGameSparksModule::GetModulePtr()->IsInitialized()) {
        gameSparks->OnGameSparksAvailableDelegate.AddDynamic(this, &ATheLegendsOfArthurGameMode::OnGameSparksAvailable);
        gameSparks->Disconnect();
        gameSparks->Connect();
    }
*/

}

}

this i do in line 30 GSI->GSObj->Connect("","");

[thin stratus]

Well easy

You are binding the delegate too late

When you call connect, it's async. IT probably calls back before you bound the delegate

Resulting in a crash

Sadly GameSparks only recently fixed the crash

Actually, why are you doing it again

I only now see that you do it twice

You should do the Disconnect/Connect stuff ONCE in your GameInstance

Instead of getting the GI inside the GameMode

That's kinda weird

        GSI->GSObj->OnGameSparksAvailableDelegate.AddDynamic(this, &ATheLegendsOfArthurGameMode::OnGameSparksAvailable);
        //Disconnected the module just incase it's connected (Refresh)
        GSI->GSObj->Disconnect();
        //Connect module
        GSI->GSObj->Connect("","");

Move that stuff to your gameinstance

[twin juniper]

i can call in player controller

classs

[thin stratus]

Na, GameInstance :P

You have the object there

so handle it there

[twin juniper]

thanks don´t crash

now don´t crash

[twin juniper]

@thin stratus thanks bro

[unborn nimbus]

Can you not call RPC's from an interface?

[thin stratus]

Could be a bug?

[unborn nimbus]

that's what I'm thinking. I cannot get this object to call a server function

[thin stratus]

Call a custom event first

to try

[unborn nimbus]

That works

but if it's set to execute on server, it will not call

[thin stratus]

Are you sure you own the Actor that you call the RPC on?

:D

[unborn nimbus]

nope 😄

It's a world actor. How would I go about that?

[thin stratus]

Only by manually setting the owner from Server side

So what ever Interface you call there

Make sure to call it on teh server already

Then you don't need the RPC on the actor

Usually, if you do it via Linetrace or what ever setup you have there, you would make sure that you already call the rpc on input in the controller/character

[unborn nimbus]

ah ok

[distant wave]

Hello!

Can u help me do something? @thin stratus

I can pay you if you want to

[worthy wasp]

@distant wave - what sort of issues you having?

[distant wave]

doesnt matter

I asked somebody else to help me

sorry

[worthy wasp]

forget i asked

good luck 😃

[distant wave]

thx

😉

[thin stratus]

Is that somebody else still me?

[junior tree]

would anyone know how big is Fortnite's map in kilometers?

[haughty star]

What would be the new improvements in UE 4.19

[junior tree]

I home something to handle a massive landscape

[stark dome]

They already have that with world composition

But there are further networking improvements coming

And updates to world composition I believe

[distant wave]

@worthy wasp @thin stratus It sounded a little weird when I said "I asked somebody else to help me". I am sorry for that. I meant I already talked to someone about this issue in private. Again, sorry for the misunderstanding. 😃

[worthy wasp]

ah gotchya - i thought like - you didnt want my help and only cedrics lol ❤

all good - hopefully you got it figured out!

[manic pine]

anyone know when initial actor replication occurs for something spawned on server?

[vital steeple]

anyone know why sequence may cause problems with RPCs?

sequence node*

respawn timer client RPC fails

https://i.imgur.com/cce8Y78.png

but works if i snip second exec line

seems liek if i connect a server RPC to that sequence, it forces everything connected to it to run as Server RPC

[obsidian kelp]

So I've got a bug
On dedicated servers when a foliage is fully harvested instead of destroying itself it stays there. You can hit it but you also pass through it
This affects every type of foliage in my devkit, on every level I place the foliage, and persists even if I reinstall the devkit
What do?

[fossil spoke]

Sounds like the Client isnt being told to destroy their version of the foliage. Is the foliage an Actor or is it part of an ISMC or something?

[obsidian kelp]

It's a custom foliage thing in the ark devkit

The best and brightest couldn't figure this at the ark modding discord so I had to go here

[fossil spoke]

Check that whatever call is being made to "destroy" that instance or whatever it is, is actually being replicated to the Client.

To me it sounds like the Client isnt being told to destroy it

Or remove it. Whatever.

If its an custom object then there is little we can do to help other than simple debugging tips since there would be limited knowledge of it here.

[obsidian kelp]

Yep very custom

It's a Mishmash of different unreal 4 versions

[fossil spoke]

Create an topic in the ARK Subforum

[obsidian kelp]

I mean I've already PMed the people that would reply there

[wary willow]

@thin stratus Yo, when you do updated versions of your Network Comp, any chance you could add a section at the end of any changes? (changelist)

[thin stratus]

Yeah however i currently didn't add anything new

The base stuff is kinda the same

Despite the conditions that were exposed to BPs

Maybe i missed something?

@wary willow

[wary willow]

@thin stratus Oh, no idea. I just noticed it was updated for 4.17

But there was no changelog, so didn't know if you added/changed anything

[thin stratus]

It wasn't updated directly. Just marked as compatible

[wary willow]

ah

[thin stratus]

So people that open it don't think it's outdated

:P

Luis also wanted the file again as he wants to print it

[wary willow]

makes sense then, but for those of us that use it as a reference it would have looked otherwise

[thin stratus]

Will add the changelist next time with "No changes - all uptodate"

[wary willow]

I won't ever remember version numbers

[thin stratus]

So no one wonders

[wary willow]

😉

But, I expect that to be expanded upon and really updated in 4.19

[thin stratus]

I wish I would've more time to actually do something on it

Yeah, IF I have time ffs... so annoying atm

[wary willow]

With all the goodies for MP

[thin stratus]

2018 will be better

[wary willow]

haha

[thin stratus]

Currently work + thesis

Is a bit too much

[wary willow]

What's your thesis on?

[thin stratus]

Strategy for the Game Halma

[wary willow]

?

[thin stratus]

Halma is a board game, a bit smaller than GO

I needed to create an AI for it

[wary willow]

Looking it up now

[thin stratus]

in a 1vs1 situation

You probably know it. It was always in the boxes with all the other board games

[wary willow]

Ah

It's Chinese Checkers

[thin stratus]

Ah yeah, that's its other name

The AI still has small minor flaws

But the overall algorithm is in place

NEed to write everything down (which I already did in once, but usually refactoring text 10 times before happy)

[wary willow]

That's cool. I am assuming this is all in UE4?

[thin stratus]

Yes

[wary willow]

And multiplayer?

Networked*

[thin stratus]

Not networked

[wary willow]

Ah

[thin stratus]

My thesis is about 3 month of time

And I need to concentrate on the actual topic

Which was the AI

[wary willow]

Ah

[thin stratus]

You can play it locally with 6 players though :D

But yeah, actual thesis is just about 1vs1

So the AI Algorithm is also only for 1vs1

[wary willow]

Easily expandable up to 5AI or no?

[thin stratus]

Na, if you play halma with 2 people you got a null-sum game

Means either player wins or draw

The algorithm takes that into account and allows the AI to calculate future moves

To make sure they pick the best move considering the enemy (you) also pick the best move

If you increase that to 2+ players, you run into the problem of not having that null-sum scenario anymore

You would need to see it as 1 vs 5, which is not true

[wary willow]

Ah, makes sense

[thin stratus]

If you are interested in that stuff, check out "Minimax with Alpha Beta Pruning"

Basically builds a tree of future game states (here boards) and evaluates them based on a value you define, for me it's distance of your pins to their home fields

Then you can run the minimax algorithm and get the best board, so also the best next move

Alpha Beta Pruning is optimization where it doesn't look into all paths of the tree if a branch is not relevant

[wary willow]

http://www.geeksforgeeks.org/minimax-algorithm-in-game-theory-set-4-alpha-beta-pruning/

Hmm, looks pretty interesting

[thin stratus]

Yeah the algorithm is super simple

Good test would be tic tac toe

[wary willow]

We learned about zero-sum games in school

[thin stratus]

there you can build the whole tree

[wary willow]

But nothing about using algorithms sadly

[thin stratus]

Ah that's sad. I enjoy this actually cause it gets me into actually optimizing something that ue4 doesn'T do oob

[wary willow]

Exactly

[thin stratus]

Like, the first tree for Halma (first move) with depth 3, so AI move -> Player move -> AI move is about ~43.000 boards

[wary willow]

This is the kind of stuff that interests me greatly actually

[thin stratus]

Now imaging if they actually meet in the middle and jumps come in

That number skyrockets

I was building the tree fully first and then analyzing it. Took ~7 seconds at some point. Way too long

[wary willow]

Are you using blackboard for this?

[thin stratus]

No

[wary willow]

Behavior Tree

Just some singleton?

[thin stratus]

The algorithm is a static function

The AI Controller executes it

[wary willow]

ah

[thin stratus]

And then tells the board it wants to move

I actually asynced all of that

Cause even with only depth 3 and building only the part of the tree that is currently checked by the algorithm (so alpha beta pruning also removes the need to build the whole tree), it still took ~1-2 seconds somethimes for the AI

And that froze the gamethread

[wary willow]

heh

[manic pine]

anyone know when exactly first time replication occurs for newly spawned stuff? is it part of World->SpawnActor ?

[cursive shard]

Can I ask how to handle client end rotation smoothing in UE4?

[slim holly]

using control rotation?

or just some replicated variable

[lean river]

@manic pine
After actor fully spawned initial replication happens almost "immediatly" in next networking update cycle i guess

But why you need that time?

[manic pine]

well not 'time' but more like sequence... i.e. i would like to set some information on that actor that's carried with the initial replication

[lean river]

Deferred spawn is your friend then :

[manic pine]

so deferred spawn delays replication too?

[lean river]

Nop

[manic pine]

until finish spawn i mean

[lean river]

With deferred spawn you can setup and modify variables

Before spawn finish

Yep :D

[manic pine]

thanks, just what im looking for; i was doing World->Spawn then setting a field on the object, but it was never set in client's spawn of the replicated object

in client's beginplay*

[lean river]

Yeah thats why deferred is good. Actor lifecycle will be started if you finish spawn, but same time you have valid object to edit default things

[manic pine]

right, though it seems a bit weird given that client runs the other stages too, which is why i thought that couldnt work

[raven viper]

Anyone has proper writeups on Net Update Frequency, actor reliability, etc? ( @thin stratus maybe?)

[worthy wasp]

I have an AActor based class that has bReplicates turned on. I need to run server side RPC's to pull off some functionality against UHierarchicalInstancedStaticMeshComponent in the world (Procedural foliage tool instances). When i setup this RPC chain - i'm getting this in the OutputLog - my RPC never runs:

LogNet:Warning: UIpNetDriver::ProcesRemoteFunction: No owning connection for actor BP_LeyLine_110. Function SRV_SpawnTree will not be processed.

How is this happpening and why? its a statically placed item in the world.... it should be its own owner no?

[brittle sinew]

What do you mean 'it should be its own owner'?

Actors don't need owners, and even if it were its own owner, so what?

The requirement to run a server RPC is an owning connection—an object owned by your PlayerController

(directly or indirectly)

[worthy wasp]

see that part i didnt know - and now understand

so with that said.... how can i manage UHierarchicalInstancedStaticMeshComponent of the foliage actor in the scene when i'm not a server auth?

i do it fine in my character class (harvesting these nodes) but i have to use a server RPC to pull this off

[brittle sinew]

Unless you dynamically change the owner, you don't.

[worthy wasp]

is there a way to have the SERVER own this actor?

[brittle sinew]

You would call up to the server on an object which you own, then do what you need to from that context

[worthy wasp]

a player should NEVER own it

this is dedicated server config btw

all players = clients

otherwise durp i'm sorry.....

i can makge a GameMode function

call up to the GM

and have hte GM process this event

[brittle sinew]

Well, no, not really

[worthy wasp]

why not?

[brittle sinew]

The GameMode doesn't exist on clients

[worthy wasp]

this is a static placed actor

has 0 interraction with clients

i need it to process events in the map

so eithe rthe LevelBlueprint does this

or the GMode

?

[brittle sinew]

At this point, I'm kinda confused as to why you need an RPC then

[severe widget]

OR I dunno maybe the pawn tells the server its trying to do the thing and the logic runs serverside?

I mean, there's always that

[worthy wasp]

thats my ultimate question to be honest....

[brittle sinew]

If it's only happening on the server, you wouldn't need an RPC...or are you trying to call things on it from the clients?

[severe widget]

Or maybe both autonomous and authority do it

[brittle sinew]

(given you said there's 0 interaction with clients)

[worthy wasp]

@severe widget - i've tried HasAuthority()

it wont edit the instances of the UHierarchicalInstancedStaticMeshComponent

[severe widget]

and besides if you want the change to be visible on clients you gotta have them know the change occured.

[worthy wasp]

UHierarchicalInstancedStaticMeshComponent->RemoveInstance(InstanceIndex); ultimately is what i'm t rying to do

i'm pulling this off no problem when i harvest these trees at runtime with clients

now....

i have an actor that is trying to change the mesh of these trees (a seperate event)

i need this actor to be able to do the above code

it can only be run FROM SERVER

if(HasAuthority()) will not pull this off

the instances still stay around

and i fully understand the need for a NetMulticast function to do this for each connected client

its the way i'm doing it for the harvesting action

@brittle sinew - this is the overflow of this design:

1: Actor is statically placed into the world
2: SphereComponent->GetOverlappingActors() returns all actors in overlap that have component: UHierarchicalInstancedStaticMeshComponent
3: Each actor is then iterated, and ran (Server->NetMulticastRPC) UHierarchicalInstancedStaticMeshComponent->RemoveInstance(iteratorIndex)

the problem is - i have no way to pull this off server side on this actor. YES i can do this @ begin play on my actor with HasAuthority() check..... but it wont for the life of me remove the instances

[manic pine]

so client performs action, sends rpc to server, server sends rpc to all clients to remove static mesh instance?

[worthy wasp]

i cant do an RPC for the above reason - "No Owning Connection"

no playercontroller owns this

as it rightfully shouldnt....

if i think about this logically - the SERVER should own this object. perhaps instead of statically placing this - i should do an event @ Server-BeginPlay - to spawn this object and apply owneership to the server (somehow?)

[severe widget]

Presumably your actor is spawned on the server when placed (assuming by a player) right?

[worthy wasp]

to kick the dead horse - no player owns this - and NEVER SHOULD

[severe widget]

bruh

nvm

[manic pine]

huh the server needs owning connection for sending client rpcs?

[brittle sinew]

HasAuthority doesn't return true on non-replicated objects.

[worthy wasp]

bReplicates = true;

[brittle sinew]

Is that possibly where the misunderstanding is occurring?

[worthy wasp]

i think it smy lack of ownership that is killing my funcitonality

i think i need to spawn this from the server (how though?) to pull off correct ownership

[manic pine]

can you be more specific about the steps taken on the client?

[worthy wasp]

ok @ raap -

the client - has 0 to do with this

this is a game event

never spawned by client

never interracted with by client

never anything - client

[brittle sinew]

You don't need ownership if you're only worrying about it on the server...?

The server doesn't need ownership to call things on the server :p

[manic pine]

okay so some event happens on the server... and when it does, you want to send a multicast?

[worthy wasp]

correct @manic pine

[manic pine]

right, and which class has your multicast function

[worthy wasp]

the actor i'm trying to run this on (it is a staticly placed actor atm in the level)

FUNCTIONALLY - this will move around - when it moves i need to run this code to alter TREES around its vacinity (SphereCOmponent->GetOverlappingActors())

if i run this with HasAuthority() from BeginPlay - you can see here that the tree spawns (grey tree) but the tree it should be removing is never removed..... the removal is done NetMulticast RPC

http://puu.sh/ywFLY/c3efa961e6.jpg

[manic pine]

according to the documentation, all netmulticast functions called from server should run on clients and server, regardless of ownership

[worthy wasp]

if i try this as a local version RPC chain - start off @BeginPlay with !HasAuthority()..... the tree never spawns and I have a "No Owning Connection" error on the actor

now.... in my CharacterClass when i'm HARVESTING theese same trees...... I have an RPC chain that goes from Client -> Server (Spawn new tree in place) -> NetMulticast (RemoveInstance(Index) )

the characte rclass pulls htis off just fine

no problems like this guy has....

sorry if this is confusing - i'm not understanding it myself

i'm still trying to make a full wrap understanding of Replication

i feel like i'm 3/4 of hte way there on some days

and other days - MEH lol

[manic pine]

yeah, it's a bit confusing, and im not entirely sure how replication works for stuff that's loaded with the actual map

[worthy wasp]

so a long time ago - someone here (cant remember who it was) itnroduced me to LOGGING a NETMODE_WORLD funcitnality ... where i can see the AUTHORITY role in my debug strings i print out with C++

when i do this... the NetMulticast string is coming in as DEDICATED SERVER

i would expect it to be CLIENT

which tells me - the NMC function isnt runnign on the client?

[manic pine]

netmulticast is executed on both server and clients

[worthy wasp]

i understand that

wait

wait wait wait

[manic pine]

but yes, if its not also showing client, then its not running on client

[worthy wasp]

i'm retarded

hold on

i shuold PROBABLY have a local fucnntion in the character class

that removes this instance of the tree

[manic pine]

well yes

you have to remove it locally

[worthy wasp]

god damnit

i dont knwo why ididnt think of that

i was trying to - but was doing from WITHIN THIS ACTOR

not the character class

which is whats viewing everything

see - talk my way through this I will (Yoda)

[opal thorn]

Nice

[worthy wasp]

hopefully - bout to test out now

[distant wave]

Hey guys

I have a oroblem with replication

basically, I need to replicate a player destruction and possession of other player, but it is mesed up. the client sees when the server does that, but the client cannot do that. when the client tries to do that, the server is doing that

I can show a vid if u want

Ok

here is the video

Hopefully someone here can help me

https://youtu.be/NGI_6-GPDvM

[worthy wasp]

beautiful - this did work @manic pine @brittle sinew - thanks for helping my mind think 😃

[twin juniper]

@worthy wasp lol are u making a similiar game ot mine

xD

[severe widget]

literally wtf - minim

also
literally wtf - me

I found his problem, it's called the whole damn project. - Also Minim

[heady delta]

horsecomponent

what's been replicated every tick

must be important 🤔

[severe widget]

@distant wave why are you using the first player controller as the controller to posses the horse? You should use the controller that is actually trying to possess it.

GetPlayerController returns the PC at a index, you are getting the PC at index 0, meaning no matter who you try to mount the horse with, only the player with PC 0 will mount.

https://gyazo.com/b49b3de57c8e46f78e1effbd20764a1c

My roommate also wants me to tell you, that he's been to nuclear power plants and never got cancer. But this, this gave him cancer

[heady delta]

to be honest

you're being a massive tool

[severe widget]

👌🏻

[heady delta]

using a guy who is asking for help as a chance to stroke your own ego is pathetic

just my 2 bob

[severe widget]

that's a cool story man

[heady delta]

yerp

[severe widget]

Sorry to rain on your helping parade.

[heady delta]

np

[severe widget]

You know cause I saw you helping him

💯

gives the guy the answer to the problem
gets called a massive tool
slackers in a nut shell

[heady delta]

I don't have time, but I'm not just gonna sit here and talk about how me and my roomie are shitting on him

[severe widget]

you've spent more time already than just closing the channel and being productive

¯_(ツ)_/¯

[heady delta]

so

[severe widget]

also not interested in your op. of me, you've called me a tool for having an opinion I explained fairly politely

[heady delta]

dude was asking to be helped, not to be shat on by some tool

but you can't always get what ye want

[severe widget]

I did help him

[heady delta]

yerp I feel you man

[severe widget]

Sweet, so we're on the same page. If you want, there is a spot with me on the tool train if you wanna hop on. Some people on the train are offering free fucks to give, but I'm out.

[heady delta]

lol

some people belong on the bed sheets

[worthy wasp]

My Playerstates (when game launches) shows the correct teams... but my players are spawning in the same location.... this code seems sound/logic but its not happening for some reason. Any thoughts?

{
    ATeamStart* TeamStartSelected = NULL;
    if (Player)
    {
        AAvantGardePlayerState* PState = Cast<AAvantGardePlayerState>(Player->PlayerState);
        if (PState)
        {
            TArray<ATeamStart*> TeamStartsA, TeamStartsB;
            for (TActorIterator<ATeamStart> StartItr(GetWorld()); StartItr; ++StartItr)
            {
                if (StartItr->TeamB == PState->TeamB)
                    TeamStartsB.Add(*StartItr);
                else
                    TeamStartsA.Add(*StartItr);
            }

            if(PState->GetTeamB())
                TeamStartSelected = TeamStartsB[FMath::RandRange(0, TeamStartsB.Num() - 1)];
            else 
                TeamStartSelected = TeamStartsA[FMath::RandRange(0, TeamStartsA.Num() - 1)];
        }
    }

    return TeamStartSelected;
}```

this is called form PlayerController after PostLogin(From GMode)

    APawn* NewPawn = GameMode->SpawnDefaultPawnFor(this, GameMode->ChoosePlayerStart(this));
    Possess(NewPawn);

[fossil spoke]

When you say same location does that mean they spawn at World Origin?

If so then i would dare say that the PlayerState isnt valid when your calling this.

@worthy wasp

[worthy wasp]

no Devils - theyre spawning at the TeamStartB @fossil spoke

sorry - was making some food

it has to be valid (playerstate) cuz otherwise this funciton wouldnt even run

and debug breaking it - it breaks inside the for loop

at the if/else statement

[fossil spoke]

Is that spawnpoint the only one being put into the array?

[worthy wasp]

each array is filled with 1

i'm gonna check the bool for each array member

[fossil spoke]

Well then thats your problem isnt it?