multiplayer

[thin stratus]

And NAME_GameSession is "Game" ?

[ripe raptor]

i.e. this issue: https://answers.unrealengine.com/questions/713191/fonlinesessionnullregisterplayers-fails-to-update.html

[thin stratus]

Well mine is steam though

Not null :/

[ripe raptor]

Same

And that was the fix that did it for me

I'm not sure if it's "Game", if I go to the variable definition in VAX it doesn't lead me anywhere sensible

UnrealNames.h

Oh wait, that leads to UnrealNames.inl

Which defines the NAME_GameSession as 287

Well, the FName index 287

I doubt hard-coding "Game" would result in that same FName index

So you probably ought to try with NAME_GameSession

[thin stratus]

Well

Usually you use "GameSessionName"

Steam only works with two different ones

Game and Party

You can't put anything else in there

[ripe raptor]

Well yeah, but whatever the case might be, I tried "Game" and I tried GameSessionName, neither worked

NAME_GameSession worked for me

[thin stratus]

So I'm searching for a way to bypass the Server for a local client

Currently my customization data is set and replicated on Possessed

But the local client already knows its customization, however I'm missing an entry point to set that

BeginPlay can't be used, as the Pawn isn't possessed yet at that point

Like, a ClientRPC on Possessed is not what I want

I want the Client to know when he has the pawn

And instantly grab his local customization info

I COULD poll the stuff via Tick and check once the controller is valid

Buuuut, that's ugly

[ripe raptor]

Well

you could stuff the customization data in your game instance temporarily

[thin stratus]

That's already the case

[ripe raptor]

and have the local pawn grab it from there once it starts

[thin stratus]

But WHEN is the local pawn ready

BeginPlay, local, calls on everyone

I can't be sure that's the local players pawn

Only if I can compare it with controller or PlayerPawn, but BeginPlay is too early for that

[ripe raptor]

Do local controllers call Posses()?

or just server ones?

[thin stratus]

Server only

I simply want to bypass the replication lag

[ripe raptor]

Well actually

[thin stratus]

Someone points this out

https://docs.unrealengine.com/latest/INT/API/Runtime/Engine/GameFramework/APawn/Restart/index.html

[ripe raptor]

I was gonna suggest your controller's BeginPlay bu that won't work either...

If not Restart, then I'm sure the game state has some sort of callback when all players have pawns assigned.

[thin stratus]

Hm, only need the local one to have that

I guess "Pawn" in the PlayerController might have an OnRep

But hm

Question is, how much faster is that than doing a ClientRPC

[ripe raptor]

Do both and check logs

a few dozen times 😛

A small digression but, how does a client leave a Steam session?

Caling DestroySession has Steam bitch at me that I'm trying to destroy a null session

[thin stratus]

Usually exactly that, destroy session

I have that in my MainMenu LevelBlueprint

As I know that there, no session should be available

At least no game session

[ripe raptor]

I'm trying to debug to see why it's not finding a session on the client but I have no idea how to attach my debugger to my build and actually have the necesary debug symbols load to break in OnlineSEssionInterfaceSteam.cpp

[thin stratus]

ListenServer?

[ripe raptor]

Because I get a warning that a session couldn't be found, and nothing happens

yea

[thin stratus]

Well, as said, you need to use GameSessionName

[ripe raptor]

well, I have the listen server make the game and I'm trying to leave from a client

[thin stratus]

If you use anything else than Party or Game, you won't be able to host

Or leave

[ripe raptor]

Hosting works, the client connects fine, it's just leaving that's the issue

[thin stratus]

Well, if the session never properly registered

Idk

[ripe raptor]

hm, the IOnlineSessionPtr doesn't seem to have a way to iterate over all sessions

Alright, last question from me... if I dump session info I get this:

[2018.01.31-13.32.49:973][ 26]LogOnline: Verbose: STEAM: Member of 1 lobbies
[2018.01.31-13.32.49:973][ 26]LogOnline: Verbose: dumping NamedSession:
[2018.01.31-13.32.49:973][ 26]LogOnline: Verbose: SessionName: anDRey
[2018.01.31-13.32.49:973][ 26]LogOnline: Verbose: HostingPlayerNum: 0
[2018.01.31-13.32.49:973][ 26]LogOnline: Verbose: SessionState: Pending
[2018.01.31-13.32.49:974][ 26]LogOnline: Verbose: RegisteredPlayers:
[2018.01.31-13.32.49:974][ 26]LogOnline: Verbose: 0 registered players

Are the registered players significant and do I have to manually transition the SessionState once the game starts?

also @thin stratus - GameSessionName is literally just #define GameSessionName NAME_GameSession

[thin stratus]

Then it's "Game"

[mild zodiac]

Is it possible to destroy actor only on client that was on map from the beginning?

[thin stratus]

Yeah, let the client call destroy

[mild zodiac]

Should this work?
https://i.imgur.com/P1wZsSd.png

[ripe raptor]

I'm surprised that my session dump shows the session name as anDRey then, since I used GameSessionName for CreateSession...

[ripe raptor]

Hey cedric, have you ever used SteamNetworking()->SendP2PPacket and ReadP2PPacket?

[thin stratus]

Nope

[mild zodiac]

If I am reading source code correctly, it's impossible to locally destroy actor that was in the world since level creation.

// Can't kill if wrong role.
if( ThisActor->Role!=ROLE_Authority && !bNetForce && !ThisActor->bNetTemporary )
{
    return false;
}

such actors are most likely under server's authority

[verbal wave]

Can confirm. In blueprint I couldn't destroy level stuff from a client even they were not replicated

some guy told me it used to work in 4.8 (BP)

[twin juniper]

yep

u can only destroy it on the client

if it was spawned on the client

its very strange tbh

[verbal wave]

how difficult is it to implement an 'official' dedicated server that host multiple session instances, with steam OSS?

I'm using steam oss listen server right now, which is pretty straight forward

Unreal provides a very user friendly framework I can understand. That is, after I learn A, B and C I'll be able to create the design I planned.

But I can't really estimate the compexity for game server backend. Is two weeks enough to setup a very basic dedicated multi-session server on something like amazon gamelift? I have sufficient skills for web hosting and stuff.

It's adding to my anxiety pool :x

[pastel elm]

Hey there. I'm about to work on a Network system that need to be online so i would guess using the steam server would be simpler. Do i need to go through this ? (Using the Steam Work)
https://docs.unrealengine.com/latest/INT/Programming/Online/Steam/

Is there any documentation that could help me to go through this process ? It would be the first time i'll work on Networking on C++, not on BP.

[full scaffold]

Hey how can i resolve this error?

Error    C2084    function 'UMyCharacterMovementComponent::UMyCharacterMovementComponent(const FObjectInitializer &)' already has a body   

It says it "already has a body" but this function isn't duplicated anywhere, been trying to fix this for a while

https://pastebin.com/QRJk0crK

here is a paste of the file

[winged badger]

did you put {} at the end of the declaration in the header?

[twin juniper]

can´t make work when i pickup a item the item its destroy only the server

how i put work the item its destroy when i use the cliente and server

[fierce oriole]

Anyone familiar with Multiplayer in Blueprints? I'm trying to make a Item Pickup Actor but I dont know how to give the Actor Remote Authority. I tried copying the functionality from a working Weapon pickup. I manually dragged in my new Item pickup into the Level but I am stuck because I dont know how to give it Remote Authority

[twin juniper]

Anyone had tutorials for Gamesparks?

[soft hamlet]

@worthy wasp hey man just getting back to this after winter break. So you mentioned you resolved it by not using AGameMode, what does your solution look like? what other way could I manage player controllers and pawns with a dedicated server?

[thin stratus]

What got resolved?

@Slayder#0513 There isn't much to tell about UE4 and GameSparks. Check the GameSparks docs.
Their UE4 plugin comes with the same functions/nodes.

@fierce oriole You need to call "SetOwner" on the ServerSide and pass it the specifics client PlayerController/Character

@full scaffold How does the Header file look like?

[full scaffold]

@thin stratus I think I got it fixed!

It had to do with constructors, had to create my own constructor for a class

I'm about to do some more tests, if it still is giving me trouble I'll post back here. Big thanks to #cpp for helping me out!

[fierce oriole]

@thin stratus Thank you. I would declare that inside the pickup actor correct? Oddly the other existing and working pickups (from Generic Shooter) arent doing SetOwner that I can see.

[thin stratus]

Well, why do you need the Client being the owner?

You usually only need that to call RPCs on that from Client to Server or Server to specific (owning) Client

And that's usually not what you do. When you create a pickup system, you want to make sure that you call a ServerRPC in your Character/Controller, right after pressing the PickUp key

and then from within the serverRPC you perform your pickup code

[fierce oriole]

Tbh Im trying to replicate the existing Weapon pickup behavior to my new Items, so I'm not sure why lol becuase Im barely learning Network stuff. This is the part in question, which fires when trying to pickup a focused item, which works on the existing weapon pickups

[soft hamlet]

@thin stratus it's regarding game mode and client pawn possesion in dedicated servers. my clients can't process input when running a dedicated server to host them. a listen server will allow input to clients just fine. very weird. I asked walldiv a while ago but he said he moved on from this problem.

[thin stratus]

@soft hamlet That is indeed weird. There shouldn't be a difference in DedicatedServer or ListenServer

[soft hamlet]

@thin stratus yeah i tried many combination, packaged games, editor games, listen and dedicated servers for both of those. same outcome apparently, but my game was using the generic gamemode class with super::postlogin, i also changed it and added my own client restart RPCS there, nothing seems to enable input to get through to the pawns. they're static if dedicated server is hosting. tried looking player controller uniqueIDs on console and they keep changing all the time on both dedicated and listen server so that didn't tell me anything.

[wide chasm]

Can someone help me with making a multiplayer resource gathering system?

[unborn nimbus]

Anyone dealt with old rep notifies being called when an actor gets loaded on a client when you move close enough to it?

[unborn nimbus]

Or even happening if you disconnect and reconnect. the rep notifies that were being sent as you disconnected all fire when you reconnect

[opaque tinsel]

does anyone know how to display players name that they saved to show on widget?

[worn nymph]

@unborn nimbus that is how repnotifies are supposed to work or im misunderstanding your problem lol

calibur . you need to save the name into the player state or another class . then set the variable on the server . make it repnotify and have each client set the playername

@opaque tinsel

im afk but if you're still stuck tonight i can send you screenshots

[small temple]

hey i shouldn't have to define _Validate and _Implementation versions of replicated ufunctions in my header files, should i?

because the compiler thinks i should

but then when i add it, it complains about that too

[bitter oriole]

No, you don't need to have them

And the compiler shouldn't say anything

What's the error log from the compiler output ?

[small temple]

@bitter oriole if i don't include them, i get a whole bunch of errors about the Validate and Implementation functions not being a member of my class

that's if i don't include them anywhere, even in the cpp file (which is wrong, yeah)

but i still get them even if i do include them, and more (along the same lines)

and by "include" i mean define or declare in this case, just to be clear

because i also #include net/unrealnetwork.h

i'm guessing i'm either doing something really dumb, or it's because i'm doing it on an ActorComponent

[bitter oriole]

@small temple Can you quote the compiler output ?

To be clear, you need to declare the method in the header (without _Validate/ _Implementation)

And you need to implement both _Validate and _Implementation variants in cpp

[twin juniper]

i can´t make it work this is my bp

can someone help-me

[bitter oriole]

@small temple Intellisense is likely to complain that the methods are undefined, too, so do compile to check

[small temple]

@bitter oriole https://hastebin.com/raw/asahitagix

[bitter oriole]

Move the body of both methods to the cpp

[small temple]

they are

can i actually quote/format code on discord btw?

[bitter oriole]

Yes, with "```" around it

[twin juniper]

what i doing wrong

[small temple]

'''like this?'''

nooooo

[bitter oriole]

Three ` symbols

[small temple]

dun dun dun

[bitter oriole]

BTW, just copy what's at the very bottom here : https://docs.unrealengine.com/latest/INT/Gameplay/Networking/Actors/RPCs/

[small temple]

ahh

[bitter oriole]

The two last code blocks are what you need to have

[small temple]

so i've got this in my header: UFUNCTION(Reliable, Server, WithValidation) void SetServerPosition(FVector Location, FRotator Rotation);

and this in my cpp: ```void UPhysicsReplicationComponent::SetServerPosition(FVector Location, FRotator Rotation)
{
GEngine->AddOnScreenDebugMessage(0, RepToServerRate, FColor::Green, TEXT("Server position updated"));
GEngine->AddOnScreenDebugMessage(1, RepToServerRate, FColor::Yellow, Location.ToString());
GEngine->AddOnScreenDebugMessage(2, RepToServerRate, FColor::Blue, Rotation.ToString());
}

bool UPhysicsReplicationComponent::SetServerPosition_Validate(FVector Location, FRotator Rotation)
{
return true;
}

void UPhysicsReplicationComponent::SetServerPosition_Implementation(FVector Location, FRotator Rotation)
{

}```

[bitter oriole]

Not sure Reliable is needed here but okay for the header

The cpp is wrong

[small temple]

ah?

[bitter oriole]

UPhysicsReplicationComponent::SetServerPosition shouldn't exist

Move its content to SetServerPosition_Implementation

[small temple]

hmmm

[bitter oriole]

SetServerPosition_Implementation is the method itself

SetServerPosition_Validate is the checker

SetServerPosition itself is not really defined

Well, really, it's defined as "if validate() then implementation()"

[small temple]

right, right, still doesn't compile though

same errors

[bitter oriole]

So you did remove ```void UPhysicsReplicationComponent::SetServerPosition(FVector Location, FRotator Rotation)
{
GEngine->AddOnScreenDebugMessage(0, RepToServerRate, FColor::Green, TEXT("Server position updated"));
GEngine->AddOnScreenDebugMessage(1, RepToServerRate, FColor::Yellow, Location.ToString());
GEngine->AddOnScreenDebugMessage(2, RepToServerRate, FColor::Blue, Rotation.ToString());
}

[small temple]

yeah

do i need to leave out the namespace? is that it?

[bitter oriole]

The rest of the code is fine

What's line 14 of your header ?

[small temple]

GENERATED_BODY()

[bitter oriole]

Did you drop the "reliable" switch too ?

But that should work

[small temple]

i'll try

without Reliable i get an error saying i need to have Reliable or Unreliable so i'll try that now

[bitter oriole]

Yeah I was confused because I write Server, Reliable, WithValidation but that's exactly the same, sorry

[small temple]

yeah then we're back to the other errors

lol

[bitter oriole]

You do include the .generated.h file too I guess

[small temple]

in the header, yep

[bitter oriole]

Can you share the header ?

[small temple]

https://hastebin.com/pixenileru.h

[bitter oriole]

Looks fine ¯_(ツ)_/¯

[small temple]

yeah

so does my cpp

[bitter oriole]

And the error is still on the GENERATED_BODY ?

At that point I'd remove the intermediate folder, the .sln, re-generate project files and do a clean rebuild. Kind of nuclear solution but it looks like you have a problem with the generated code

[small temple]

k

wait because that is pretty nuclear, lol

but yeah i'll give it a try

meanwhile, are you sure it has nothing to do with this being an ActorComponent? @bitter oriole

[bitter oriole]

I am, since I have basically exactly what you're doing myself

[small temple]

ah

[bitter oriole]

Network physics component

[small temple]

nifty

[bitter oriole]

Well, fake physics, anyway

[small temple]

yeah i did it in blueprint before so it's a silly question actually

[bitter oriole]

One thing I don't have is a server method with two parameters but surely UE4 isn't that broken

[small temple]

i guess i should build my project without the server function first yeah?

actually, no

never mind that

the point is, it fails to compile

[bitter oriole]

Again ? Same issue ?

[small temple]

seems like it

it's hard to tell because c++ error logs are fucking incomprehensible but the first error in the output log is this so... PhysicsReplicationComponent.h(14): error C2039: 'SetServerPosition_Validate': is not a member of 'UPhysicsReplicationComponent'

[bitter oriole]

Try with one parameter ?

[small temple]

alright

should work with 2 though, since it works in bp

but maybe some other magic is required

[bitter oriole]

Dunno, I usually pass structs myself

[small temple]

doesn't work with one parameter

[bitter oriole]

Yeah, I figured... Can you share the cpp too ?

Sounds like you did it well but I don't know anymore 😛

[small temple]

https://hastebin.com/avefamiqut.cpp

[bitter oriole]

You'll want SetIsReplicated(true); in the constructor I guess

[small temple]

i'll be damned if that's it

[bitter oriole]

I wouldn't expect it

[small temple]

nope, that's not it

[regal hazel]

Why does the header require two params but the validate and impl only have one?

(sorry coming in late)

[small temple]

the header is old

[bitter oriole]

He tried changing to one since that yeah

[small temple]

i removed the second param since then

[regal hazel]

Ah, I see!

[bitter oriole]

I'm super confused here, it all looks correct

[small temple]

yeah 🤷

[regal hazel]

Maybe???? it wants a const ref? (doubtful, but at this stage)

¯_(ツ)_/¯

[bitter oriole]

That's super maybe territory

[regal hazel]

haha absolutely

[small temple]

doesn't look like it matters in other examples

[regal hazel]

But, alas i've seen stranger things

[bitter oriole]

I'd just comment out all the code and paste the doc example

[regal hazel]

(good show)

[bitter oriole]

void SomeRPCFunction( int32 AddHealth );```

[small temple]

i'll try that

[bitter oriole]

{
    if ( AddHealth > MAX_ADD_HEALTH )
    {
        return false;                       // This will disconnect the caller
    }
    return true;                              // This will allow the RPC to be called
}

void SomeRPCFunction_Implementation( int32 AddHealth )
{
    Health += AddHealth;
}```

Well, you're going to need Reliable, so even that doc is out of date

[small temple]

i'll build first, might take a minute

oh it was fast actually

it's weird how it doesn't define (?) the namespace

[bitter oriole]

... Yeah, the class is absolutely required too

sigh

[small temple]

oh, this succeeds though

???

if i add the namespace

[bitter oriole]

So move back to your code bit by bit ? Start with one int32 parameter , etc

[small temple]

will do

i bet that'll be it

nope

oh hold on, made a mistake

mmmm, interesting

so i kinda messed up in my test here but i changed the parameter to an int32 and also commented out one of the prints in the implementation function

then i compiled, and it worked

now the weird thing is, i reverted those changes and it still works

so it was either the print function that was causing a problem, or the parameter type

i guess they were somehow stopping the compiler from generating the generated.h

and declaring the Validated and Implementation functions

and now that they're generated, it doesn't matter anymore

[bitter oriole]

Strange

[small temple]

very

someone ought to file a bug report

someone who knows more about this stuff than me 😏

[wary wyvern]

Hey guys. Is it possible to destroy actor on server, but keep it in the world on clientside?

Trying to make this, but Actor still destroys on client.

[small temple]

try disabling replication on the client as well? @wary wyvern

btw @bitter oriole do i call this function with SetServerPosition() or SetServerPosition_Implementation() now?

[bitter oriole]

SetServerPosition()

[small temple]

great, thanks

[wary wyvern]

@small temple It is a server function. It wont execute, i guess

[small temple]

oh yeah, good point

in that case, maybe try a custom event that runs on the server

[wary wyvern]

What do u mean?

[small temple]

right-click > custom event > set it to Run on server

in that event, disable replication and destroy the actor

then call it after your delay

also tick the Reliable box

[wary wyvern]

And why do I need to send it to server?

I already do it on server

[small temple]

the authority check can be a bit finicky iirc @wary wyvern

i'm not sure though

it shouldn't really matter because SetReplicates executes on the server anyway, but you never know

[grand kestrel]

The authority check isn't finicky in the slightest

[small temple]

@grand kestrel you're not finicky in the slightest ❤

[ripe raptor]

Anyone know of a good resource for inviting friends and / or joining a friend via Steam without them having invited me?

[thin stratus]

Hm, given you have the Friendlist ingame

You should be able to do "JoinSessionViaFriendID" or so

[ripe raptor]

So when I am in my game, and I turn on the steam overlay, right click on a friend and do "invite", their game gets a delegate fired for that?

[thin stratus]

Yeah

I bound that in my GameInstance

Let me check

[ripe raptor]

Does that delegate get fired even if their game was turned off at the time of accepting the invite (i.e. after Steam automatically launches the game?)

[thin stratus]

That I don't know

Just be aware, that these don't fire on the gamethread afaik

[ripe raptor]

right-o

[thin stratus]

Ehm

I should be things like these

SessionInterface->AddOnSessionUserInviteAcceptedDelegate_Handle

SessionInterface->SendSessionInviteToFriend

Not 100% sure anymore what is all involved

But as seen above, the SessionInterface has delegates and functions for that

They all work similar to the normal Create/JoinSession stuff

[ripe raptor]

The first step is getting the friend list in-game, after that I'll poke around and see what's there. I doubt there are many pitfalls in there.

[thin stratus]

There I have a tutorial for

Check UE4s official Streams

I was hosted once for that

[ripe raptor]

oh neat

https://www.youtube.com/watch?v=oDSJ7vixpCE

That one?

[thin stratus]

Yus

[ripe raptor]

Thanks

[thin stratus]

Friendlist stuff starts around 16Min I think

Or 14

[ripe raptor]

The best advice I ever got regarding any sort of video tutorial is to watch it at 1.5x speed

or 2x

[thin stratus]

Yeah, what ever feels good for you though

I rather watch them a bit slower

[ripe raptor]

Yeah, I'm generally not a fan of video tutorials 😛

[small temple]

yikes

i'm trying to replicate a property and i'm getting this error: error C2065: 'OutLifetimeProps': undeclared identifier

along with more errors after that as usual

i've got #include "Net/UnrealNetwork.h" in my header as well as this UPROPERTY(Replicated) int32 Doinks;

and this in my cpp ```void UPhysicsReplicationComponent::GetLifetimeReplicatedProps(TArray<FLifetimeProperty> &OutLifeTimeProps) const
{
Super::GetLifetimeReplicatedProps(OutLifeTimeProps);

DOREPLIFETIME(UPhysicsReplicationComponent, Doinks);

}```

anyone got any idea why?

[ripe raptor]

OutLifeTime

[small temple]

oh, GetLifeTimeReplicatedProps is also declared in my header of course

[ripe raptor]

capital T

[small temple]

oh, i'll be damned

yeah that's it, thanks @ripe raptor

now this is coding!

[thin stratus]

I still struggle on finding a proper way to setup data before a player joins

[ripe raptor]

The stuff from yesterday?

[thin stratus]

On GameMode::Login I get a PlayerID. I used that instantly to retrieve customization data on the Server for that Player.
In the Character Possessed, I used that Data, stored in the PC, and set that on an RepNotify

But race condition between Possessed nad the data retrieve event

I hope possessed would be later, but it seems it calls in between

-.-

Now I moved all the "get customization" stuff to each instance

[ripe raptor]

damn

[thin stratus]

And replicate the ID to the players instead of hte customizations

I don't know what class I can use to properly set this up

I grab the ID as soon as the player logs in and gets a PlayerController

So that's already the soonest

[ripe raptor]

Well, the way I do it, and the way it works for me, is that I have my loadout and customization inside my player state. In my Pawn's OnPossessed I fetch that from my playerstate and send it across with a multicast to everyone. Each client then just instantiates all the cosmetic items, abilities etc.

[thin stratus]

I need OnRep as clients join late

But that didn't work for me either

[ripe raptor]

oh

[thin stratus]

Cause sometimes the PlayerState didn't get the stuff before Possessed called

[ripe raptor]

Well in that case

I suppose your OnPossessed needs to poll for the data retrieval

[next falcon]

How do i remove instanced static meshes for all players ?

[thin stratus]

@ripe raptor But that isn't optimal either

As I don't want to do that every time the drone gets respawned/possessed

I might just offsync the possess

And let it wait till gamesparks returns data?

[ripe raptor]

Well, it is optimal if it's the only option 😛

That being said, and this is a silly suggestion probably, but what's stopping you from doing this:

[thin stratus]

Wiating with the possess?

So far nothing

[ripe raptor]

Your game mode gets the ID, fetches the customisation, assigns it to your player state. Your Possessed event reads the player state, gets the customization from the player state and stores it in a class variable of its own which is then replicated and should be usable in OnRep on all clients?

[thin stratus]

I can already store it in the PlayerController

Since I replicated on the drone, I don't need the PlayerState

But yeah

I currently use the native ue4 spawn system

That's why I didn't want to do that yet

[ripe raptor]

Well, can't you do a combination of RPC-ing the customisation in OnPossessed with late-joining clients using BeginPlay and reading the data from there (It seems that all replicated data is available at this stage in pawns)

[thin stratus]

Why would I. OnRep is totally fine for that

It's more about the time between GameSparks callback and possession

Server asks GameSparks for data but the Client already gets his drone before he gets the customization data

[ripe raptor]

Ooooh, now I get it, sorry, all this time I've been wondering where the delay comes from

[next falcon]

How do i remove instanced static meshes for all players ?

[worn nymph]

@thin stratus I had this problem so I set a timer by event on my event OnPostlogin with a branch . It grabs the joining controller casts to playerstate and just checks if the data is valid yet if so it breaks out of the loop. Clears the timer and carries on as normal . During this time I just show loading screen .

[thin stratus]

Yeah I do it with a boolean and a dispatcher

[worn nymph]

What about overriding prelogin?

[thin stratus]

Yeah that too

Will show the system once working

Idea is basically this

With this in the Controller for loading the data

[worn nymph]

The thing I find hardest is knowing when to use what. I swear nearly everything is an interface/dispatcher or repnotify but I fear I'm overusing stuff maybe or doing things wrong . But as long as it all works for now I'm happy lol

[thin stratus]

So if the boolean isn't true yet, I just subscribe to the Dispatcher

And wait with the spawning

Also enabled "spawn Player as spectator" in the defaults of the GameMode

Let's see if that works

[unborn nimbus]

@worn nymph I think you misunderstand what's happening. The player stands in a group of enemies and takes enough damage to be killed. OnDeathEvent gets called and replicates to all clients through the rep notify. Player clicks respawn and respawns at the respawn point. Player moves back to the enemies that landed the killing blow causing the OnDeathEvent to be called. When that actor the landed the killing blow loads on the player's client, the rep notify gets called again.

[thin stratus]

Whats the proper way of turning a specator into a normal player?

Cause Spawning an pawn and possessing it doesn't work

@unborn nimbus OnReps always fire if you get into the distance

That's what OnReps are for

C++ has an "OldValue" to compare to

In case you re facing double OnRep

BP though not

[unborn nimbus]

Yes I understand that, but there should be no old value

everything should fire and succeed and be done when the player dies

there shouldn't be waiting rep notifies when the player returns

[manic pine]

i think changing from spectator to normal player is just ChangeState(NAME_Playing), then spawn and possess as usual

it calls EndSpectatingState, which destroys spectator pawn, sets bIsWaiting to false and bisspectator on playerstate to false

[thin stratus]

Yeah, currently BP only GameMode :/

Guess I could expose that

It will spawn the default pawn then?

[manic pine]

dont think it will spawn anything, just set player state to playing

after which you can spawn/possess like normal

[thin stratus]

Hm will test! Thanks!

[manic pine]

yeah ive been struggling with the whole spectator/inactive stuff myself

it seems very messy

trying to replace it with my own spectator system where gamemode handles it instead

more convenient with collections of activeplayers and spectators

[thin stratus]

Everything works so far with specatating

Just going to playing again didn#t out of the box

Will expose the Change event to BPs

And test

[manic pine]

aplyercontroller's BeginPlayingState is empty

[thin stratus]

Yeah it's okay, will just call RespawnPlayer

[manic pine]

ye, should do it

there's also the pc's inactive state, which starts a timer that calls UnFreeze after minrespawndelay

kind of a hassle reworking all of this into a round-based system

[thin stratus]

For now it would be enough to revoke the spectating

I only need that whole thing to delay spawning

Shouldn't last longer than a few ms anyway

But cleaner to handle longer outage

[ripe raptor]

Is there a pre-processor macro to know if Steam is actually enabled in a project?

[twin juniper]

hello

how i put when i pickup a item the item its remove from level

i only can put work if its the server

and not the client

this channel here is so bizarr ._.

[thin stratus]

@manic pine Any idea what "Name_Playing" is actually?

Na, will just make two functions /shrug

Still can't spawn. My goodness

"Start Player As Spectator" and "MustSpectate" setup.
Then, when it's time to spawn, MustSpectate is false, State is schanged to Playing. Still not possessing

Let's delay a frame

Well, Spectator Pawn gets properly despawned. My possess stuff doesn't work though. Hmpf

[ripe raptor]

I can't believe there is no paltform independent system for getting friend avatars, meh.

@thin stratus - Hey, I know you're busy with your customization thing, but I have just one small question regarding the stuff from your video

[thin stratus]

yo

[ripe raptor]

Just the #include <steam/steam_api.h> bit

I suppose I need to use the same steam SDK that my UE4 installation is using?

and I suppoes I need to add that sdk folder to my VC include directories?

[thin stratus]

All steps for making steam work are in the video though

[ripe raptor]

oh yeah at the start of the video

Forgot about that

[thin stratus]

Okay, so one thing I noticed is, that "NumPlayers" and "NumSpectators" never got reduced/incremented

So I did that now and it properly starts the match

But I still can't possess the damn pawn

[raven holly]

you asking to posses on the client or server?

[thin stratus]

All Server

[raven holly]

put a onpossed on the pawn and see if its ever triggered

maybe its being kicked out straight away

[thin stratus]

Already have a print for Possessed and Unpossessed

Both not happening

The Pawn itself spawns though

[raven holly]

is the actor replicating ?

[thin stratus]

Yeah yeah, it's all working if I don't let the client spawn as a spectator first

[raven holly]

It must be some kind of protection

[raven holly]

is there a bool on state or something that specifies if its a spectator

maybe you need to turn that off first

or the player controller

there you go

you probably want to set this to false before trying to posses a player pawn

[thin stratus]

Already doing that

void AHLPlayerController::K2_ChangeStateToPlaying()
{
    if (GetStateName() == NAME_Spectating)
    {
        AGameMode* GameMode = Cast<AGameMode>(UGameplayStatics::GetGameMode(this));
        GameMode->NumSpectators--;
        GameMode->NumPlayers++;
        ChangeState(NAME_Playing);
    }
}

void APlayerController::ChangeState(FName NewState)
{
    if(NewState != StateName)
    {
        // end current state
        if(StateName == NAME_Spectating)
        {
            EndSpectatingState();
        }
        else if(StateName == NAME_Playing)
        {
            EndPlayingState();
        }

        Super::ChangeState(NewState); // Will set StateName, also handles EndInactiveState/BeginInactiveState

        // start new state
        if(StateName == NAME_Playing)
        {
            BeginPlayingState();
        }
        else if (StateName == NAME_Spectating)
        {
            BeginSpectatingState();
        }

        UpdateStateInputComponents();
    }
}

void APlayerController::EndSpectatingState()
{
    if ( PlayerState != NULL )
    {
        if ( PlayerState->bOnlySpectator )
        {
            UE_LOG(LogPlayerController, Warning, TEXT("Spectator only UPlayer* leaving spectating state"));
        }
        PlayerState->bIsSpectator = false;
    }

    bPlayerIsWaiting = false;

    DestroySpectatorPawn();
}

BeginPlayingState does nothing

[raven holly]

strange

i do believe it will be some sort of protection though

[thin stratus]

Yeah well

I don't know what that should be :/

PlayerState->bOnlySpectator = false;
bPlayerIsWaiting = true;

Guess there were more booleans epic didn't reset

...

[arctic hazel]

bit of question, im trying to get my gun module to replicate the data table of sounds/names etc across all clients, i've got a custom event for the "fire" in the componment thats on the MasterCharacter leading into https://gyazo.com/2f9c2e8afa78fa1f474d091148470f9a

yet when gun fires client returns the printstring empty.

nvm im a dummy,

needed to pass Weapon data thru the multi cast 😄

[manic pine]

@thin stratus hmm, looking at playerController::possess, it actually does a ChangeState( NAME_Playing ) itself

the checks i can see that can fail a possess are: !HasAuthority() or !( PawnToPossess != NULL && (PlayerState == NULL || !PlayerState->bOnlySpectator) )

so not authority, null pawn, or a playerstate with bonlyspectator true are the three conditions that can fail a possess call

[thin stratus]

Yea the "bOnlySpectator" solved it in the end

Had to manually reset that

[manic pine]

i think bonlyspectator is only meant to be used for players joining purely as spectators

e.g. spectators at pro matches, who can never actually join the active game

[thin stratus]

Well that's the thing though. It only works if I set "MustSpawnAsSpectator"

Setting the boolean for "Spawn is spectator first", it doesn't actually do that

Only with the MustSpawn it properly not spawns the Player

And then it flags him as "Only Spectator"

[manic pine]

ah yes, the silly default implementation of HandleMatchStarted asks CanRestartPlayer on every player controller in the world(including spectators)

which in turn asks PC if he can restart, which says yes unless bOnlySpectator is set

if you were to override APlayerController::CanRestartPlayer with a condition that checked spectator state instead of bonlyspectator, that should do the trick

[raven holly]

@thin stratus so you sorted it?

[thin stratus]

It's in testing now

[raven holly]

ok

i am currently figuring out why UE adds like 30ms to my dedicated servers ping, testing different net tick configs atm 😐

Didnt get a reply from epic about it https://forums.unrealengine.com/unreal-engine/feedback-for-epic/1414496-example-networking-config-from-epic-games

"NetClientTicksPerSecond is used to throttle how many clients are updated each frame, hoping to avoid saturating the server's upstream bandwidth, although"

Documentation in source isn't really detailed

it's used here though: float ClientUpdatesThisFrame = GEngine->NetClientTicksPerSecond * ( DeltaSeconds + DeltaTimeOverflow ) * ( LanPlay ? 2.f : 1.f );

Ok seems like NetServerMaxTickRate clamps the servers tick rate on everything

Ok then it's used 'ActorInfo->NextUpdateTime = World->TimeSeconds + FMath::SRand() * ServerTickTime + NextUpdateDelta;'

ServerTickTime is NetClientTicksPerSecond

"This also means all other connections will force an update (even if they just updated, we should look into this"

[manic pine]

adds 30ms? that seems excessive

whats the server fps?

[raven holly]

It is at 30 tickrate, when i ping the server directly with cmd i get like 50ms, ingame i get 85-90ms

it's not saturated in any way

ive done netprofiles etc

just seems like UE adds ~30ms onto the actual ping, i am wondering if i should just offset peoples pings to show a more realistic number

[manic pine]

well 40ms would be worst case if running at 25 fps ye

in addition to travel distance ping

so if you up server tick rate(and it can actually manage higher fps), you'd lower added ping

[raven holly]

yep trying at 40 tick now

doing a build

[manic pine]

im doing mine at 100, but im building a fast paced mp fps

which just feels much much better with high server fps

[raven holly]

im doing open world 50 player server

[manic pine]

yeah, wouldnt go too high with that amount of players

fortnite is at 30fps i think

maybe even lower

[raven holly]

yeah i hit some issues with CPU at ~40 players, so i have been rewriting a lot of my code

as there's AI in the world too

And i have like 3000 replicated actors spawning / despawning constantly

[manic pine]

that does sound heavy

[raven holly]

yeah haha

[manic pine]

its possible youre simply cpu limited and not actually reaching the 30 tick rate

[raven holly]

i've done profiles, but you know what they're like.. cpu stalls throw it all off

[manic pine]

guess you could do a print from the server to tell you the deltatime

[raven holly]

Yeah that could work

if i turn AI, and item spawning off, the ping is usually lower

[manic pine]

yeah, the ping should really just be regular network ping + whatever deltatime is

[raven holly]

ahh ok

so i should minus that from what i show the players?

[manic pine]

no, cuz players are interested in the effective ping ye

[raven holly]

hmm

[manic pine]

doesnt matter if you have 10 ping but the server uses 100 ms to respond to commands

thats the same as 110 effective ping

[raven holly]

ah ok

i guess

[manic pine]

youre using the regular playerstate ping ye

[raven holly]

yeah

thats an averaged ping

it stores last 4 pings and averages it i believe

[manic pine]

yeah, it can lag behind for a few seconds if ping changes abruptly

5 seconds to catch up entirely

it messes up my lag compensation ;|

oh well, player's fault if they have unstable connection

[raven holly]

lol :p

I tried in blank project and i still get like 20ms added

i guess default server tick is 20

[manic pine]

hmm that seems excessive though... are you doing pie?

[raven holly]

nope built

i built the server, put it on a VPS

blank third person project

all default

i ping with cmd, get 50, net stat get 70-80

[manic pine]

could the vps be adding too?

[raven holly]

i have a local linux box which i want to try

[manic pine]

yeah, i think trying different hosting would be a good idea, just to rule it out if nothing else

[raven holly]

actually no i tried amazon ec2 and it was the same ping

ooh

increasing tick to 45 reduced it

its spiking around a lot though

but overall is lower

[manic pine]

hmm maybe the ai calculations

uneven server load isnt great

[raven holly]

yeah working on stabilising it

[manic pine]

ideally it would be able to keep the same fps constantly

better with stable ping than lower ping

so if it cant run 45fps smoothly, 30fps would be preferrable despite the higher ping i'd say

[raven holly]

oh wait i made it 40 tick

i also reduced netclienttick to 100

[manic pine]

reduced? you mean it was higher?

[raven holly]

yes lol 200 default in UE

NetClientTicksPerSecond=100

[manic pine]

ah yeah but its limited by fps

so it chooses whichever is lower, ye

[raven holly]

ill turn off AI and see

but it was interesting when i was doing stress tests, the more players the higher the ping got. But I assume that would be because of the CPU bottleneck

[manic pine]

yeah, lower fps for every player it has to service

[raven holly]

Seems like AI wasnt the cause of the spiking of ping

so ill turn AI and item spawning off

see if it becomes stable

[manic pine]

items are spawning just like that? e.g. no detecting player presence or stuff?

[raven holly]

the AI have radius checks, but items no

it constantly keeps 3000 items around the world

[manic pine]

ah right, but it doesnt keep spawning after 3000 has been reached

so there should just be an initial spike

[raven holly]

yeah and my math for spawning is pretty optmised atm

alright so i turned item spawning off and no major spikes

sitting around 68 ping

64-68

[manic pine]

so thats 18 ms~

[raven holly]

servers at 40tick

going to turn graphics up and see ping impact now..

ok 30 fps on client = 80-84 ping

[manic pine]

yeah but thats to be expected

keep in mind most games will just show you the network ping

[raven holly]

yeah but im not sure showing them actual ping is a good idea, because you know what people are like lol

[manic pine]

haha true

you could use a bar ^____^

[raven holly]

bar?

[manic pine]

like call of duty did

[raven holly]

oh true

[manic pine]

like those cell phone bars ye

[raven holly]

yeah lol signal

[pallid mesa]

just define a playable ping by yourself testing with someone

who knows, maybe in your game 95 ms is 4 bars 🤷

[manic pine]

ye, depends very much on the game and lag compensation etc.

[raven holly]

yeah well i have my net code pretty good, like i do stuff on client for reponsiveness etc

so player doesnt feel the ping

i can play with 300ms and still play alright

apart from some very little rubberbanding due to movementcomp speed changes

[pallid mesa]

If you have time or want to expand your netcode of this project on a future

I would suggest double approach for certain ping thresolds

server side/client side as BF1 did

[raven holly]

yeah

it moves to server side bullets at high ping no?

[manic pine]

you mean like both delay and compensation?

ive seen some games if ping > X, delay shot by 100ms then do regular compensation

[pallid mesa]

yes, at high ping, I believe it was around 110 or 120

[raven holly]

ah really

that would make it worse i think

[manic pine]

yeah for the client

but makes the compensation more accurate

[pallid mesa]

why do it that way if you can do it in the server straight away 😄

[raven holly]

i still verify bullet traces on the server

but i use the clients trace if the server completes the verification

[manic pine]

so much can happen if the shoot command is still in transit to server

anyway, at a certain ping point it becomes impossible to make it good for all clients

[pallid mesa]

thats the thing, If you have high ping, you should deal with it, not others.

[manic pine]

best to punish the high pingers

[pallid mesa]

thats the premise I always leave

yes definitively

[manic pine]

yeah, i know this other game which has some kind of...weird compensation ping

if a single bad ping guy joins the game, everyone has to deal with absurd lag compensation

[raven holly]

lmao

[pallid mesa]

thats the thing

xDDDD

[manic pine]

as a result, brazilians and north americans are hated in the entire player base

[raven holly]

you can always ping lock, but me being in new zealand, i know what it's like being locked out from playing with international friends

and actually games like PUBG, most of their playerbase are chinese

[manic pine]

ye, better to just delay the shots from the highest ping players

[raven holly]

but a lof of their chinese playerbase play on US and UE servers

[pallid mesa]

and indeed, this is a problem

https://clips.twitch.tv/SnappyMiniatureGuanacoKlappa

[manic pine]

or you'll have good-ping players running behind a wall and getting shot a full second later

[raven holly]

So i changed the config on the server to 20 tickrate, getting 84 ping now

[manic pine]

anyway you'll have to experiment to find a solution that makes good sense

[raven holly]

was 68 ping on 40

interesting..

[pallid mesa]

30 is a good number

and it's the default one

[raven holly]

i want to try 120 and see what happens lol

even on 30 i get higher than usual

[pallid mesa]

UT is at 60

[manic pine]

30 should be fine unless youre doing high paced fps

[pallid mesa]

yes

[manic pine]

more important is that its stable

so server doesnt constantly go from 5fps to 30fps

[raven holly]

yeah true

[manic pine]

that will mess up your lag compensation

[raven holly]

all my players are like "where are you servers, i get such high ping"

and im like.. well uhh UE adds it's share + network time

i think it might be better to just show them the net ping

[manic pine]

in your umg widget, do ping - 50

he he he

[raven holly]

LOL

[pallid mesa]

thats why I wouldn't manual compensation for high pingers

[raven holly]

i was thinking that, putting offset of like -20

because that's what it seems like

[pallid mesa]

tsk tsk I'll screenshot 😂

[raven holly]

LOL

ok 120 tick lets see

60 ping

solid

LOL

[manic pine]

thats a 10ms add ye?

[pallid mesa]

thing is that you are alone in the server

[raven holly]

true

[manic pine]

very nice

[pallid mesa]

the more peeps you get into it, the more you will notice how 120 will ☠

[raven holly]

but these investigations will help others too

[pallid mesa]

yes for sure!

[manic pine]

at least now you know everything is working correctly

[pallid mesa]

as I say always, write about it!

[raven holly]

lmao

[pallid mesa]

write your findings somewhere and documment them

[manic pine]

you'll need to figure out why your spawning system is killing fps though

on server

[raven holly]

yeah ill run some more profiles

it's physx syncing i believe

[pallid mesa]

are you using assets for things like decals and footsteps?

[raven holly]

huh?

[pallid mesa]

do you async load things?

or just... PLOP spawn and there you go

[raven holly]

async load what sorry

i spread my loot spawns over multiple ticks

[manic pine]

hes just spawning player items i think

[raven holly]

every 0.25 seconds an item spawns

[pallid mesa]

oh ITEMS!

[raven holly]

up to 3000

[pallid mesa]

i though players haha

[raven holly]

yeah lol

[manic pine]

huh that shouldnt cause an issue

should be able to do a dozen spawns every tick without much fps impact on server

[pallid mesa]

well that depends what is the item doing

[manic pine]

maybe youre spawning 3,000 items every 0.25 sec

^_____^

[raven holly]

yeah it's a weird physx issue i believe, it calls 'update scene'

lol i doubt it

[pallid mesa]

the world items should have no logic at all

or if they do, it should be light

[raven holly]

well items have a mesh

[manic pine]

yeah, if it has to load assets and stuff as well i guess it could hurt a bit

[pallid mesa]

nah for an item is fine since it just holds some materials

in the case of a character with footsteps and everything going on is a bit more harshing

[raven holly]

footsteps are easy

[pallid mesa]

items have a mesh, but do they have any code?

[raven holly]

yes items do

[manic pine]

is there any reason not to just spawn them all immediately though?

[pallid mesa]

separate the "usable item" from the "world item"

[manic pine]

at a rate of 1 per 0.25, players can search through an area, not find anything, then have it spawn as they leave

[raven holly]

well it's constantly despawning and respawning

it's a living ecosystem

[manic pine]

oh

[pallid mesa]

can't you pool it somehow?

[raven holly]

not a BR game where u can just spawn and be done with it

[pallid mesa]

instead of destroy it and spawn it?

[raven holly]

has to rotate around the world randomly etc

yes i could pool it

[pallid mesa]

pool it then

[raven holly]

on construct of the items they create a shape based off the meshes bounds

[manic pine]

hmm this is still not sounding very intensive though, unless that item logic is insanely complex

[raven holly]

so they can use unreal's 'try adjust location if overlapping'

[pallid mesa]

construction and destruction are expensive operations, if you spam the hell out of them of several Actors (idk which is the rate @raven holly 's working but have that in mind)

[manic pine]

yeah but one item per 0.25 seconds

[raven holly]

yeah i've been profiling etc, all that is causing hitches now is some physx sync

[pallid mesa]

0.25 only?

I though 0.025

[raven holly]

yes 0.25

nope

so 4 per second

[manic pine]

4 a second shouldnt be noticeable

[pallid mesa]

ok, now I understand more

[raven holly]

ill turn item spawning on with 120 tick

lets see

[pallid mesa]

do you rely a lot of physics on your game?

[raven holly]

the items simulate physics

but only on the clients

they used to simulate on the server, but yeah it caused server crashes

[pallid mesa]

that could give you offset problems

[manic pine]

hmm then why is item spawning causing physx problems on server?

[pallid mesa]

client one sees the item on (22,22,0)

client two sees it on (23,22,0)

[raven holly]

it's called 'sync' hold on ill find it

[pallid mesa]

that could happen

[raven holly]

yeah it's an .. what do you call

[pallid mesa]

I call it a bug

[raven holly]

compromise

[pallid mesa]

hehehe

[raven holly]

whats the word

[manic pine]

haha

[raven holly]

lol

[manic pine]

compromise is good ye

[pallid mesa]

ayee I guess it is

[raven holly]

like if it's in 2 different places but not by much its ok

[manic pine]

i dont know, it could get annoying in some cases, but for 99% of cases the items will be almost at the same place

the fringe cases will be weird though

one client sees the item at the base of the cliff, the other sees it at the top

[raven holly]

yeah has happend on top of buildings

[pallid mesa]

it could go even worse, if the item has bounciness each client will simulate their bounciness version

projectile + physics

[manic pine]

hahaha

yeah bounciness would make it hilarious

[raven holly]

so 120 tick, with item spawning 60-80 ping

[manic pine]

so thats up to a 200% increase in ping

meaning half fps ye

sounds nasty still

[pallid mesa]

I had to totally disable physics on a multiplayer project I'm on, people were like "BUT WHYY" - I reprogrammed a light version of faked physics under the premise that clients cannot kick an ammo pack 🃏

[manic pine]

poor ammo packs

[pallid mesa]

POOR?

they were bullying them?

[manic pine]

ye

[pallid mesa]

I gave them an oportunity

[manic pine]

automatic ban on kicking an ammo pack

[pallid mesa]

but it's sad anyways, they live only for 30 seconds

[manic pine]

a short life ye

[raven holly]

when you forget item code for water and you need to try survive when testing

[manic pine]

having to actually play your own game

horrible

[pallid mesa]

ayyyyy

[raven holly]

ok doing some profiling

[manic pine]

i rarely understand this profiler

sometimes its obvious, but more often than not it just tells me "something is wrong"

which i already knew

what did you call this physics thing it was doing again?

[raven holly]

it's syncing with the world

i think

when an item spawns it has to sync

[manic pine]

but you didnt have physics on the items on the dedi ye?

[raven holly]

nope

https://cdn.discordapp.com/attachments/221799426820276226/405526691612721153/unknown.png

there it goes

[manic pine]

thats a large amount of physx going on

[manic pine]

this is an average frame?

[raven holly]

i think its a single frame

but its a hitch

[manic pine]

yeah but i mean a random frame

oh, its a hitch frame

[raven holly]

im doing a few profiles to see

im pretty sure it did this even without anything running

like no ai or items spawning

[manic pine]

hmm youre sure the items youre spawning have SimulatePhysics turned off?

[raven holly]

yep

[manic pine]

how are you turning it on on clients?

[raven holly]

beginplay

after a couple ticks

[manic pine]

with autothority ye

[raven holly]

ofc 😛

[manic pine]

without**

[raven holly]

?

yeah remote node

[manic pine]

if!hasauthority -> turn on

right

could it be affecting path finding

e.g. you spawn object, it recrates nav map or some such

caneveraffectnavigation i think its called

[raven holly]

pretty sure i disabled that

i do use realtime nav

Thats basically all the logic it has

ok thats with no items or AI

average

with items

but its not simulating 🤔

[manic pine]

and thats after what, 1 minute run time?

so 240 items spawned?

[raven holly]

about 160 seconds

there is this setting in the editor i wonder if itll help

[manic pine]

i havent tried it myself, but isnt that something you additionally have to activate per actor

[raven holly]

i think so

i did have some primitives which did affect nav inside the item

[valid python]

I've got a simple setup where I shoot a projectile and then have the ability to pick it up. It works great about 60% of the time. The remainings times the projectile either stops too early or goes too far on the client resulting in the object not actually being where its supposed to be. I have bReplicates and bRepilccateMoevemtn set to true but I think i'm missing something more or do I need to aggressively combat desync in some way? I'll need the position to be as accurate as possible later on in order to dodge the projectiles

[fossil spoke]

Are you using Physics?

Physics is terribly difficult to replicate.

[valid python]

I believe I am

from what i can see it looks like the client is incorreclty assuming physics

[fossil spoke]

Try using the ProjectileMovementComponent instead

[valid python]

nvm yeah I am using the ProjectileMovementComponent

not pyshics

[twin juniper]

what do you need to do when making a online game?

what are the steps

first, make.....?

hiiiii

is that a question?

[oblique mountain]

jep

@twin juniper https://docs.unrealengine.com/latest/INT/Engine/Blueprints/UserGuide/OnlineNodes/ maybe that will help you?

[twin juniper]

correct the "hi I....." sentence. letters missing

[oblique mountain]

Problem solved 😄

[valid python]

For testing purposes can I disable client prediction for the projectile movement component?

Or any thoughts on making it more accurate in general

it seems to be predicitng stuff that isn't accurate, when my projectile hits a wall sometimes the client think it bounces further than it actually does

[worn nymph]

dang the amount of times friggen begin play trips me up on a replication issue. i always forget it gets called for both server and client lol

[icy nacelle]

This is my functionality for dropping an item in my game (Dedicated server)
The system works perfectly fine when the delay is removed, when playing as server.

The system does not work without the delay when playing as a client as the items only refresh after an item is dropped (So effectively you can spawn two items before the node is removed from the inventory)
If the player drops the item, then closes and opens the inventory, the inventory will show that item has been removed.

I've added the delay and its fixed the problem - Its hacky, but its a temporary solution.
Does anyone know why this error is persisting? I spent about an hour today with my lecturer and he couldn't figure it out either.

[fossil spoke]

@icy nacelle You need the Client to remove the item from the inventory locally before you send the RPC to the server

[icy nacelle]

I've tried to cast it to the client on the second sequence pin, and it still doesn't work.

[fossil spoke]

The RPC should also return to the client an verification step that lets the client know that the operationwas successful

[icy nacelle]

Also tried to cast it straight after the 'Remove from Inventory'

[fossil spoke]

Huh?

Cast

?

[icy nacelle]

RPC it to the client***

[fossil spoke]

Your client needs to "assume" that the Server will eventually remove the Item

So the Client does it in advance

Locally

This removes the perceived effect of lag

[mild hull]

why is your create inventory a rpc to server?

[icy nacelle]

@mild hull I just noticed that, probably did that a couple months ago when I first created the inventory, and didn't know as much about RPC...

Okay @fossil spoke, so
pin 0 - server rpc for dropping item + remove from inventory
pin 1 - Remove from inventory
pin 2 - refresh inventory panel
???

[fossil spoke]

Sure sounds right, you will need the Server to RPC back to the Client to tell it whether or not the Item was dropped, because if it wasnt then you need to readd that item back to the inventory.

You dont want players to lose items 😃

[icy nacelle]

Okay, but if I'm removing the item from inventory twice, doesn't this mean the second time its just removing it from an empty array?

[fossil spoke]

So your Inventory is completely Server side?

[icy nacelle]

Nope, inventory is client side

[fossil spoke]

Then how/why are you removing items from your inventory on the Server then?

[icy nacelle]

I think I sometimes confuse myself with RPC. God knows why I'm making a multiplayer game aha.

I thought that when you remove the item while RPC server, it removes it from the player, but does this with the server's knowledge to prevent any cheating?

[fossil spoke]

Not exactly lol

So the idea of an Server Authoritative architecture is that there is an single governing body (the Server, can be another Player which is an Listen Server or it can be an Machine which is an Dedicated Server it has no GUI at all) and then other bodies connect to it and attempt to "Simulate" whats happening on the Server as best they can.

Each Player in an Dedicated Server is Simulating what the Server is doing, this is what Replication is.

The Server is telling each Client, "Hey something changed, this is what it is, update this on your end please"

This means that the Clients have an copy of everything (almost) that is on the Server

[icy nacelle]

Yep, I understand that part

[fossil spoke]

Clients can modify their version of the Simulation as much as they like, but the Server has Authority over them if something changes on the Server.

This is how Clients cant cheat an effect the gameplay experience for other users.

Because they can only modify their own Simulation

They need to ask special permission of the Server in order to change something (Client to Server RPC)

This is also why variable replication is an waterfall, only the Server can cause an variable to replicate down to clients, clients CANNOT replicate up to the Server.

So if Clients are simulating whats on the Server then that means they have an copy of whats on the Server.

If you have an Inventory for each Player on the Server Side version of the Player, then the Client should also have that same Inventory locally.

Because they need to Simulate it themselves in order to see whats going on.

If an Client wants to drop an Item

He needs to do the Drop locally and then tell the Server "Hey i just attempted to Drop this Item out of my Inventory, can you please do that for me and send me back the result" (Client to Server RPC, then an Server to Client RPC reply with verification)

If the Server sends back an negative result, as in the Drop operation was denied by the Server, then the Client can safely go ahead and update their Simulation again by adding the Item back to their local inventory.

If the Server accepted the operation, then all is good as the Client had already removed it locally and the Server has updated its Inventory.

Does that make sense?

[icy nacelle]

crystal clear.

[fossil spoke]

The hardest thing for most people to grasp is the concept that both the Server and the Client have the same "version" of the game running. As in that both the Server and the Client has the same version of each Actor etc etc

[icy nacelle]

I am with them on that one 😃

[fossil spoke]

Good. Its tough if your new to this type of concept as it can be pretty abstract

[icy nacelle]

Thanks for the help, I've saved everything you said so I can re-read it until I fully understand!

[fossil spoke]

Another bit of advice. If i was you, i would build your Inventory as an Actor Component.

And attach it to your Player Controller

[icy nacelle]

Yeah, I think I stumble a lot on replication. Cedriks compendium is good, but its sometimes difficult to get specific things right.

Yeah, I have been thinking about moving the inventory system somewhere that isnt the character.

[fossil spoke]

Modular code is much much easier to maintain

Seperating specific functionality out into an Component is an ideal solution

[opaque tinsel]

how would i add a kill score?

[fossil spoke]

Probably add an Integer to the PlayerState would be the most ideal solution.

Kills

Deaths

Points

PlayerState already has an inbuilt Score variable

[raven holly]

@fossil spoke you really do that with replicated vars?

i just tell the server to remove the index and wait for replication to update the inv

[fossil spoke]

Huh?

[severe widget]

like removing on clientside

and yeah

[raven holly]

lol the inv stuff

[severe widget]

that's a common thing

[raven holly]

really? strange

[severe widget]

yeah.

I mean or you could just have the UI look like its removed.

[raven holly]

i thought if you modify it on the client its overwritten by the server anyway

[opaque tinsel]

I currently have it as what you said. When the actor dies, i cast it to the PlayerState, get the kill variable and + 1 to it. However its saying both players got the kill.

[severe widget]

Same thing. You gotta clean up if it doesn't get removed either way, or have a laggy update on your UI

[fossil spoke]

The Client always bases its assumption on the fact that the Server will return with an correct result for that operation.

9 times out of 10 it will be correct

Its all about maintaining the illusion 😃

Or you can just deal with having an laggy UI

[severe widget]

you wouldn't do that for everything

[fossil spoke]

No of course not

[raven holly]

i never change any replicated vars on the client

[fossil spoke]

But you get what i mean

lol

[manic pine]

with some things its worth the effort

[severe widget]

but doing stuff clientside and letting the server correct it if need be is definitely a thing

[manic pine]

or you end up with lots of laggy actions in a game that will annoy players

[raven holly]

hm maybe

[fierce oriole]

Anyone know why I cannot change this Array Element? Is it the Constructor?

I call AddItem from the pickup actor after the Player does the Interact event

If I run AddItem on the Pickup Actor it works but then I have to bypass functionality:

[dull stream]

anyone have a clue why local multiplayer might not work properly in standalone

but be fine in editor >_>

[opaque seal]

When sessions just stop working after working for ages, for no reason, both LAN and Steam, yet "open 127.0.0.1" works fine.

3 weeks chasing this down, literally killing the enjoyment of all the work prior.

Read at least 30-40 google page results that all my links are purple, many of those threads never being solved either. Why are sessions so damn fickle? Why after 3 years of random issues people have, are they still this fickle? #funkiller

When logging, I see the broadcast happen, and I see the 16 bytes both sent and read, but after that, nothing happens anymore. What's crap is, all of this worked and one day just stopped working but nothing in relation to sessions has been changed or edited in that epriod of time. Literally had the rug pulled out, and others have had the same problem, made threads, not had it solved and given up on their project. I don't really want to dot hat.

This was copying the MP Shooter tutorial. I also see many complains focus on the same tutorial. Is that tutorial inherently bad these days and should be avoided?

[twin juniper]

@dull stream You need to be more specific "works" and "doesn't work" is too vague

what is not working

hosting sessions, joining sessions

It's generally better to play by right clicking the .uproject and do "launch game", it's required for steam services to work

[dull stream]

its fine, I fixed it for now.

but while i have your attention

when you set up local multiplayer, aka CreatePlayer, spawn a controller and pawn... you typically do that in gamemode? or do you create a playerManager class of sorts

whats the "best" way to handle this sort of thing

from like a design perspective

[twin juniper]

in the game mode or server side player controller

but usually game mode since it can be different

[dull stream]

alright, yeah i was doing it in gamemode

thanks I think Im good now for the most part

[twin juniper]

I decide which pawn to spawn in player controller, but I tell game mode to do the actual spawn (find player starts, spawn and possess)

[dull stream]

ahh right

yeah i think thats what i did

do you typically use playerStart actor for spawning?

In my particular situation I threw my pawns in the map rather than using playerStart. I guess it just depends on the game eh?

[twin juniper]

for multiplayer I would always use player starts

[cobalt whale]

When I use net PktLag=200 there is high chance of stucking in aimed state after aim button is released. Why is this happens and how to fix it?

[twin juniper]

@cobalt whale Show us what's going on in there