multiplayer

[brittle karma]

im worried about one thing with that tutorial, the car doesnt move like a car at all, its floating in the air

[coral girder]

You will get differences in clients because of those two reasons.

They just give you the basics.

[bitter oriole]

If you want a racing game on flat surfaces without wheel simulation or drift or..., go for that tutorial. If you want to do an actual racing game, use client auth with real physics

Like you said yourself

Server auth in UE4 = need your own physics code everywhere

[coral girder]

I'm actually wanting to write plugins to help here.

A lockstep AABB physics engine would be ungoldy nice.

fps games often don't need good solutions for prototyping, or arena styled games at that.

That's what was expected of most people that work in indie, the good genres like rts, racing, open world, sandboxy to a degree, mmo's all require extensive work and either engine hacks, workarounds, or custom engines in some cases.

Eeeeespecially mmo's >.< Even without the networking issues you have to figure out ways to dynamically add mechanics for abilities/buffs, dynamic inventory systems that have very little band width that can reliably and easily replicate across the network (usually using id's and such that map to other things), it's a big mess. And the questing... Sorry I don't mean to discourage. Got off track. But i'd suggest doing what he mentioned and living with the limitations. Maybe doing a side project trying to get it done in different ways, in small doses to learn. This field is a really in depth one.

And it's all a tradeoff.

Here's an example, resident evil 4 while not a favorite game of mine, got around the limitation they had (probably intentional) where characters couldn't move and shoot at the same time, by tweaking the feel and messing with the animations of the zeds so that the experience was still interesting.

Maybe that same principle can be applied to networking designs.

[unreal pine]

Can't remember the command to show the server corrections on a client. Anyone know off the top of your head?

thought it was netstat something or other 😬

[coral girder]

https://answers.unrealengine.com/questions/857198/get-ping.html

There's that at least.

Or maybe there's a command to use in the shell to directly check between your ip and the target.

[unreal pine]

it's a viewport visualization or something

shows a capsule when the server corrects the client's location

or maybe 2 capsules

(from->to)

[coral girder]

Oh cool i'd like to know to.

[unreal pine]

p.netshowcorrections 1

[coral girder]

Thaaank you!

[twin juniper]

Need help with the dedicated profile: ERROR: Server target not found. Server target is required with -server and -cook or -cookonthefly

[humble comet]

Guys correct me if Im wrong. Afaik, replication of variable happens when it changes, but it still uses cpu cycles,but what happens when i use COND_Custom and switch off when dont need rep, will it stop wasting cpu cycles then?

[eternal briar]

[Question] Does Begin Play on PlayerController happen after the logic in OnPostLogin is executed?

[grizzled stirrup]

Having many crashes regarding UI widgets in the PlayerController after seamless travel, am I correct in saying that the HUD class will be completely fresh after seamless travel (No old widget pointers being brought across from the previous level), therefore minimizing potential stale UI problems?

[brittle karma]

guys im using this code to see if my player has fell off the map

    if (GetActorLocation().Z < -500) {
        Respawn();
    }
``` player is on map but sometimes the condition of that if statement returns true and Respawn gets called

this is happening since i unchecked Replicate Physics to Autonomous Proxy

and this only happens for client. server is fine totally

[high current]

you wouldnt run that function on client anyway

[brittle karma]

that Respawn calles RPC

void ARacingPawn::Respawn()
{
    Server_ARacingPawn:();
}

[twin juniper]

@rare gyro Thanks alot, I've added a server.target file already, But not build with Development server, Shall i do it from my project file or from the source file, Or is it no matter?

[rare gyro]

@twin juniper project

[twin juniper]

Ok, Thanks alot

[coral girder]

Persistance... Reminds me of login systems for websites.

I don't know how it's done properly.

But I'd often attach a key/password along with the id like your thinking. And so that no one else can pretend to be them... Unless they find a way to crack it.

Or packet sniff >.>

I suck at encryption so there's probably a better way >.<

[brittle karma]

i may find my problem with falling off from the map, when i depossess the vehicle i saw it felt through the floor

but why client itself can see that too? from client view its not falling and player moves around, but when i eject from client its obvious and recognizable

i checked floors collisions

its ok, but still it falls

[red musk]

Hello everyone! I have a question about How to make AI movement smooth over the network

For a regular player, movement is done on the client through the MovementComponent which is replicated, so it effectively is doing client side prediction and looks great.

For an NPC though, the AIController lives on the server, moves the enemy, which appears choppy over the network on the client due to no prediction; anyone know how to smooth this out?

[high current]

🤔

movement usually appears choppy when your client is trying to do something else than what the server is doing and end up getting corrected

but for AI, that should not be the case, server issues the command and the AI has replicated movement, so the client will just receive the movement and that is it, there shouldn't be any choppiness, are you sure that you are not doing anything on the client?

[twin juniper]

@rare gyro Still same error 😦

[rare gyro]

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

[twin juniper]

When i build it as server, Is say's i selected win 64, When it selected 64, And saying invalid platform :/

@rare gyro

[twin juniper]

Would need help with this, Just posted it but is contains more information there, Than I can post here: https://answers.unrealengine.com/questions/916606/invalid-win32.html

[shut gyro]

When I choose to do a seamless level transition with an actor that is kept across multiple levels, it doesn't choose my player starts even though I override the ChoosePlayerStart method, which worked for a OpenLevel transition method call, and ends up choosing something near the origin I believe

Also, persisting my vehicular actor throughout the levels' collisions becomes disabled all of a sudden and falls through the floor. Why would this be happening?

[high current]

it not so much that the collision of the vehicle is disabled, but more so that the colliders of the world actors have yet to be initialized

[shut gyro]

Ok, that makes more sense. Is there an event I can call that waits till the world is fully initialized or something like that?

@high current

[high current]

Hmm, not exactly sure as I havent done server travel myself

I would hazard a guess and say that HandleStartingNewPlayer

would be a good place do callback on the GM

https://docs.unrealengine.com/en-US/Gameplay/Networking/Travelling/index.html

[brittle karma]

im trying to tell the client update yr location based on what server is telling u.
i used this code in Tick function of Player.

    //[Server]
    if (Role == ROLE_Authority)
    {
        //Get Server side Location for Client 
        ReplicatedLocation = GetActorLocation();
        ReplicatedRotation = GetActorRotation();
    }
    //[Client]
    else
    {
        //Set Server side Location for Client
        SetActorLocation(ReplicatedLocation);
        SetActorRotation(ReplicatedRotation);
        UE_LOG(LogTemp, Warning, TEXT("Client Location : %s"), *ReplicatedLocation.ToString())
    }

it doesnt work

still its not synchronized.

any idea?

[shut gyro]

@high current I already call it from there and it still passes through.

However, I moved the entire level down, and you were right about collisions not generating fast enough. It was able to generate. Seems like I need a bigger delay which I can just hardcode, but I am scared in levels that take longer to load and more collisions, I need longer waits and shouldn't hardcode it so I really need an event for stream level loaded

[viscid veldt]

Anyone know a way of doing multiplayer 100% in UE4 without LAN, VPN, Steam, or server? There's got to be a way to just have the players host and find players online without doing outside of the game client.

[high current]

yeah, the default ue4 subsystem

and listen servers

the host needs to have 7777 port opened

and configured NAT

Altho, I wouldn't recommend it, multiplayer subsystems exist for a reason...

[viscid veldt]

yeah thats what i mean, there's not a way for a regular player to just host and play games using just ue4 on any random pc

[high current]

well there is, I just described it

[viscid veldt]

can a player open their port through ue4 alone

[high current]

no

[grizzled stirrup]

I moved all of my Widget references and logic from the player controller to a HUD class but it seems even so, after seamless traveling, the old UI is still on the screen in a stale inactive state and new UI of the same type gets added on top of it

Is it best practice to remove any widgets from viewport and set any widget references to nullptr before seamless traveling to avoid this?

Or even better, can a fresh HUD be created on each map that is loaded after seamless travel?

[ember slate]

So how good is the built in unreal networking

Is it good enough or do I have to use third party?

[worthy perch]

When I travel, I clear all the widgets.

[tardy ivy]

Question for all Back End Devs... What is the best way too store large item inventories on a cloud server? Or how do large Teams like Bungee store Destinies Player Inventories?

[worthy perch]

How different is running listen server + client in PIE vs the actual environment?
i.e. Is the listen server set up in PIE (Multiplayer Options: Number of Players 2+) fairly accurate?

[twin juniper]

https://issues.unrealengine.com/issue/UE-27444 this is joke? no fix?

[twin juniper]

??

[twin juniper]

@twin juniper you trying build dev server?

@twin juniper I'm trying build a dedicated server, I've runned development, And development editor, And those have worked out fine, But then I tryed launch my game profile on UnrealFrontend, And it give me error that it need to be -server or such, So when i tryed run it, It won't work

give me your sln file, i know how fix that

i had this too

From project?

yes

I've tryed build my project for 2 days, 14 hours in total, Cus my CPU, And when I'm soon on the end, Everything going down

@twin juniper

replace

Ok, Let me try, I'm very thankfull for you trying to help me

Should i generate, Then build development server, Or?

no, just replace sln and open it

Ok, I'll try

I still can't build development server or launch the profile :/

https://cdn.discordapp.com/attachments/221799385611239424/612201747422773248/Outpoy.PNG

same thing?

Yes, I select all the stuff, Right clicking on Fusecry, Clicking build, And still saying invalid 32

try last time

[worthy perch]

You have the Server and Client target.cs's?

[twin juniper]

I have the server targetr

target

@twin juniper working now?

Trying, Will try let everything load

Is saying this

1>------ Build started: Project: Fusecry, Configuration: TVOS_Development Win32 ------
1>UnrealBuildTool : error : Remote compiling requires a server name. Use the editor (Project Settings > IOS) to set up your remote compilation settings.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.MakeFile.Targets(44,5): error MSB3075: The command "C:\Users\jesper\Downloads\UnrealEngine-4.22\Engine\Build\BatchFiles\Build.bat Fusecry TVOS Development -Project="C:\Users\jesper\Desktop\Fusecry\Fusecry.uproject" -WaitMutex -FromMsBuild" exited with code 5. Please verify that you have sufficient rights to run this command.
1>Done building project "Fusecry.vcxproj" -- FAILED.
========== Build: 0 succeeded, 1 failed, 2 up-to-date, 0 skipped ==========

I don't know why is saying TVOS and IOS :/

Let me try

Also wana say, That I'm very thackfull that you trying help me

Hmm is saying it can't open cus of some installation of VS, Let me check

I'm running a setup, I'll tell how it goed when is done

@twin juniper

weird, i had vs2017

@twin juniper

Ye, I'm running VS2017 too, But not latest update

@twin juniper I'm running it now, is coming far than is gone before, But is not in the game folder, But that should not matter`?

I mean in the solution, Not folder

it should be game folder, no idea why not working

sometimes i had invalid 32, sometimes not

Is building right now, but normaly is say's game in the VS2017 Games-Fusecry. But now it was outside that folder

maybe it will not work, but at least it compiles something

problem is you have bad cpu

I've setup dedicated one time before, On another game, So it weird is sometimes not working

I remember my engine compiled in 20 minutes, and the server in 6-7

For be to compile the development to my engine, Took me 9 hours, Then development editor took 5 hours, And is not even finished with the dedicated server

[grizzled stirrup]

@worthy perch Regarding your reply about clearing the widgets before you travel: do you simply remove from viewport and set any UWidget pointers to nullptr?

It does work but I was still getting a few crashes when the game was trying to access a pointer from before

Even when I did set it to null before traveling

[worthy perch]

I do not manually set them to nullptr, but I just keep as TWeakObjectPtr.

So they would either be valid or nullptr, anyway. But my UI master object (that holds all references to widgets) is destroyed on travel.

[grizzled stirrup]

Really interesting thanks!

By your UI master object, could you also destroy the HUD class as that's the class I'm storing widgets in at the moment?

[worthy perch]

Though, TWeakObjectPtr and widgets are kind of weird with removing them from parent and GC.

I currently don't use the AHUD class. My UI Master is actually a widget created from the PlayerController and I just add widgets on to that.

[grizzled stirrup]

Yeah I was getting crashes like this on spawning in after a seamless travel even after explicitly clearing UI references before travel and creating new ones on spawn

if (MyWidgetRef)
{
    WidgetRef->DoSomething(); // crashes here
}

Oh cool so you have one UUserWidget that has all necessary widgets contained within it?

So it's only one widget that you have to RemoveFromViewport before traveling?

[worthy perch]

UWidgetLayoutLibrary::RemoveAllWidgets()

That's really all you have to do.

[grizzled stirrup]

Oh cool I never knew about that

Thank you

[worthy perch]

I don't know why you would crash from that, though. Maybe IsValid()?

[grizzled stirrup]

I've had a few crashes like that in the past where it's been cleaned up but still technically exists, the only fix I've found is to explicitly set it to nullptr

I'll probably also set any widget references to nullptr after calling that RemoveAllWidgets() function

[worthy perch]

Why not just use TWeakObjectPtr?

[grizzled stirrup]

As my create new widget function checks if the reference is already valid before creating the widget, then sets it

Can you give an example of how that'd look in the header?

TWeakObjectPtr<UUserWidget> MyWidgetRef

?

[worthy perch]

Yeah.

[grizzled stirrup]

Ok thanks I'll try using those instead

Hopefully they won't persist across via seamless travel- seems to be the main issue

Old stale references persisting that aren't active anymore

[rose egret]

how custom UStructs are serialized and replicated?
if one of its member changs will all the members get replicated?

[thin stratus]

Any idea why APlayerState::BeginPlay isn't calling if "ReadyToStartMatch" returns too fast?

I think it's only PIE though >.>

[rose egret]

btw, I don't want to write CustomNetSerilize

[thin stratus]

okay, fixed it

.>

[grizzled stirrup]

@thin stratus Was it returning too fast or something else?

[thin stratus]

Yop

[grizzled stirrup]

I've noticed that a few delays seem necessary in a few cases

Like the listen server host / client 1 initializing their UI just fine

But Client 2 has blank UI

Because the GameState didn't replicate its properties to it yet

I need to delay usually a full second for it to consistently work

[twin juniper]

@twin juniper Is fusecry propery is only showing Development, And development, And more, But not development server, i think that is the problem

When i will build it

@grizzled stirrup for widgets that have valid pointer but are waiting to get GC, you can do !widget->IsInViewport()

[grizzled stirrup]

@twin juniper Thank you very much! That'll be very useful

In the case where you check like so

 if (MyWidget)
{
    // The widget still exists from the previous level and is here via seamless travel in an inactive stale state
    if (!MyWidget->IsInViewport)
    {
        // We want a fresh new widget to be created
        MyWidget = CreateWidget().... 
    }
}
else
{    
    // It doesn't already exist in any capacity, create a fresh widget as usual
    MyWidget = CreateWidget().... 
}

For example after seamless travel you might run this code over all widgets that have to be spawned when starting a match

In the case where MyWidget is still valid but waiting to get GC'd, what happens to it when MyWidget is assigned a new fresh widget of the same type as in that example?

Will the old MyWidget that was waiting to get GC'd get GC'd automatically in the background or something?

[thin stratus]

@grizzled stirrup Oooor, you use "PreClientTravel" to clean up the UI :P

Freaking wrong person tagged, sorry!

[twin juniper]

xD

[thin stratus]

@grizzled stirrup

[twin juniper]

No worries

[grizzled stirrup]

@thin stratus Thank you very much! I'll remove all UI from viewport and set any widget references to null there

Would you also recommend using TWeakObjectPtr<UUserWidget> MyWidget for widget references as Floss suggested?

[thin stratus]

Technically yes, at least if you reference them outside of the main class the live in

[grizzled stirrup]

They are only referenced in the HUD class I believe

[thin stratus]

WeakObjPtr should make sure that the UserWidget doesn't survive cause of them

[grizzled stirrup]

Ok great

[thin stratus]

Our UI sits all in the LocalPlayer iirc

[grizzled stirrup]

As I was manually calling a cleanup function on the PC before traveling but there were still some crashes after if checks on Seamless travel, might be fixed now with these tweaks

[thin stratus]

We have one Menu per GameMode Class and then a combination of Dialogs and Toasts

[grizzled stirrup]

Interesting! Do you split your gameplay UI up or have a master widget that contains multiple sub widgets?

Like time / score / killfeed / health etc.

At the moment I have separate widget refs for crosshair, in game menu, settings menu and gameplay state menu

the gameplay state menu holding healthbars and weapon info as well as time / match info

[thin stratus]

We have
Menu

• Dialog
  -- Dialog
  --- Dialog (Top most is active)
  Toast (Queue)

And for Gameplay with have one W_HUD widget that creates the other elements on the fly

W_HUD has a CanvasPanel and our HUD Widgets basically have the CanvasPanel settings

And when they get created the HUD takes these to position them

Settings of e.g. the Health Bar at the bottom left

That way we can adjust this pretty quickly

And even expose these to a config file

To define what should be visible and what not

[grizzled stirrup]

That's really cool! And if you have to communicate events (such as notifying a player he was hit or that he hit something else), would you communicate that via the owning PlayerController?

// In the PC
if (W_HUD)
{
    if (W_HUD->W_KillerInfo)
    {
        W_HUD->W_KillerInfo->PlayKillerInfoAnim();
    }
}

[thin stratus]

Yeah, we keep track of a few of these classes by casting them

So it basically runs a generic event for spawning them and then we catch the ones we need, e.g. the crosshair

And the PC then gets the hud and the crosshair to notify it

Most of this is done with delegates though

[grizzled stirrup]

That's a really cool setup

Very modular

I find I'm doing stuff like this constantly in my PC but it feels a bit obtuse

// Called when this player does damage to another player on the server
void AMyPlayerController::ClientPlayHitmarker_Implementation()
{
    PlayHitmarker();
}

void AMyPlayerController::PlayHitmarker()
{
    AMyHUD* MyCustomHUD = Cast<AMyHUD>(GetHUD());
    if (MyCustomHUD)
    {
        MyCustomHUD->HitmarkerEvent();
    }
}

So then in the actual HUD class it access the widget itself and does whatever it needs to

But I guess it keeps things clean and clientside with the PC being the messenger

[thin stratus]

Yeah that is okayish

You can also just make a delegate in the PC

[grizzled stirrup]

What would the delegate subscribe to though since it could hit any number of things that'd trigger a hitmarker?

It's simplified for example but different things would trigger different types of hitmarkers depending on context

So the only way I was able to get it working for me was via direct client RPCs when whatever particular actor confirms damage dealt from the owning player

Glad to hear it's not terrible though, but having the widgets directly in the PC did eliminate that HUD step

Probably better to separate them like this in the long run though

[thin stratus]

@grizzled stirrup Well you usually design this less direct

As in, you make a "OnHit" event

With some data being passed

And that does some stuff in the PC and otherwise calls a Delegate

And whatever needs to know about this (your hitmarker) can bind to it

[grizzled stirrup]

Thanks that's a fair point!

I do have delegates for almost everything on the UI (Time / score ) etc

Will try and move the hitmarker to a delegate instead, it'd still have to call a client RPC though right? So it'd instead be something like:

void AMyPlayerController::ClientPlayHitmarker_Implementation()
{
    OnHitEnemy().Broadcast(EnemyType, DamageDone);
}

[thin stratus]

Yop

Kinda need to pass EnemyType and DamageDone via the RPC though

@grizzled stirrup

[solar stirrup]

If I want gameplay abilities to be predictable and reconcilable (e.g. teleportation, projectile throw etc) should I set them up to be an input move in the character movement controller?

[thin stratus]

If you really need that you should check #gameplay-ability-system

Cause that does replication

@solar stirrup

[solar stirrup]

oh, it already does replication correctly?

[thin stratus]

It should afaik

[solar stirrup]

that's nice

[thin stratus]

With prediction and all that crap

It's pretty complex though

But still the go to thing if you need complex replicated ability systems

[solar stirrup]

I was wondering because another article about the cmc said otherwise

[thin stratus]

The CMC is movement related

[solar stirrup]

It talked about a "teleportation" ability

using the gameplay abilities plugin

The Teleport ability itself will be added in a similar way to the Jump ability in CharacterMovementComponent. We need to indicate when this ability has been triggered, and process it correctly on the server. We will still execute it locally so that the game feels responsive. Sending and receiving the data between client and server is automatically done as part of the existing networking, we just need to pack and unpack the data. Once we have made our child class from UCharacterMovementComponent, we can override AllocateNewMove to create our own version of FSavedMove_Character, which is what we'll store in the pending move list. Our version of FSavedMove_Character will have a few overridden methods. GetCompressedFlags will be overridden with a new flag to indicate triggering of the Teleport ability. UpdateFromCompressedFlags will also be updated to unpack our new Teleport flag and trigger the ability on the server side. This method will allow for robust movement abilities to be created in networked games. 

[thin stratus]

Right, it would basically go hand in hand with the CMC

Cause the GAP should help with prediction

And the rollback stuff should work via CMC

Might be that you need to include that flag into the CMC

[solar stirrup]

alrighty, but I don't have to do it right? Just makes it a bit more robust that way?

ah yeah

[thin stratus]

You can also not use the GAP

And just do everything by hand (we did this)

But it's also a lot more work to get this properly synced

The Movement stuff stays teh same

If you need a new sort of movement

similar to jumping

Like speedboosting, dodging etc.

you will have to extend it

[solar stirrup]

So basically make my own ability system, and the replication for it?

[thin stratus]

The SaveMove stuff is for input related abilities

Jumping is an input

it's process on the client and then send to the server

In a flag

And saved in the move (like you quoted)

If you use an ability, it's not directly through the input anymore

[solar stirrup]

Wouldn't all abilities be input related unless "passive"?

[thin stratus]

It goes through the GAP

[solar stirrup]

ah yeah that I understand

[thin stratus]

So you should read up on the GAP

If it helps with that

Epic has this RPG game

where they showcase it a bit

I haven't used it, but a co-worker uses it for one of our clients

And it does a lot

[solar stirrup]

If I decide not to use the GAP, I could use the save move stuff to predict on the client, execute on the server and have it reconcile automatically right?

[thin stratus]

If the Ability is executed through a client input and you have nothing between the CMC and the player

then yes

You'd setup the flags and the savedmove

(i can't 100% say that the GAP removes that step though)

(so you should read about it and ask in that channel before jumping onto the task :P)

[solar stirrup]

will do, thanks ^^

[twin juniper]

When I launch the server exe, Start the builded game, Write in my ip and even have made a string, So when i press a button is should open. But it won't join the map, Just be stuck at entry, And show nothing in the logs

And I've tryed without the port too

Wait, is connection with the defauly 127.0.0.1, But not with my public IP, Why?

[bold latch]

for projectiles, i am trying to use one time replication with bNetTemporary.

when the server's projectile impacts something and is destroyed, what is the right way to destroy the simulated proxies on clients? or do the clients have to rely on their own impacts (client impact could be incorrect though)?

basically i am looking to multicast one last time for destruction. is that possible?

[twin juniper]

i have no clue why but the hud from my server is showing up on the clients and vice versa

i thought widget were only on owning client

nvm now clients can only see theirs but server can see all

[jolly siren]

The 1.5 second timeout is there because there is no point in flooding a client while it is too busy.

Epic says they may remove the LastReceiveTime < 1.5 check in the future, but no timeline

Some more public info on the topic can be found here https://answers.unrealengine.com/questions/97569/view.html

I'm assuming it gets set again once the saturation is resolved

Within ServerReplicateActors_PrepConnections

But Epic states that the LastReceiveTime < 1.5 is of questionable usefulness now. I would test without it and see if you run into any issues

yeah you will. And you don't necessarily have to use the source build for development. You can just build against it for something like this that would only affect packaged games.

np, good luck

[worthy perch]

Is there a good way to get the PlayerController associated with the PlayerState? I don't think my way is right.

[winged badger]

@worthy perch GetOwner()

[worthy perch]

Hmm, did not consider that. Thanks.

[twin juniper]

As I can't use my public Ip to connect to the dedicated server, And so far only the 127.0.0.1 port worked, What IP and port (Probaly 777) should i port forward?

[west mason]

7777, 7778 for base TCP

27015 for steam subsystem @twin juniper

UDP ports should punch without forwarding rules

[twin juniper]

Let's say I want people to be able to join worl wide, And my server only connecting with the IP 127.0.0.1, Then i would not be able to port forward`?

Because the IP is local, And when i enter my public in command, It won't connect

[west mason]

do you have a public ip?

[twin juniper]

How you mean?

[west mason]

localhost (127.0.0.1) or local-lan IPs (192.168..) clearly won't ever be available to anyone

https://www.whatsmyip.org/

[twin juniper]

Yes, That's why i wana be able for people to enter my local IP.7777, And connect to my server

[west mason]

Not local, public ip

[twin juniper]

But instead, Myself can only connect to 127.0.0.1

[west mason]

Yup

that is normal

[twin juniper]

So how will i be able to get player from diffrent places to join?

[west mason]

From your own server's perspective, your IP is 127.0.0.1
From your LAN, it is 192.168.1.1 (or similar)
From everyone else, it's another one

But all three, while writing different IPs, will still connect to the same server

would anyone know if i can put replication conditions on replicatedmovement?

[twin juniper]

But, If i want another player to join from another place, What IP would i give_

[west mason]

https://www.whatsmyip.org/

the one you read here.

Proven the IP is public, that depends on your ISP, and that you've properly forwarded ports on your router

[twin juniper]

Was to no help, Cus that IP don't work

[west mason]

did you forward the ports on your router?

there's also the chance your IP just isn't public.

[twin juniper]

I haven't forwarded anything, Because i don't know what for forward

[west mason]

Port 7777 and 7778

[twin juniper]

TCP or ?

[west mason]

TCP, yep

may also need UDP

[twin juniper]

Wait, I'll send screenshot of the place to port forward, THen you can maybe point me to the right formats

Is it port mapping?

[west mason]

Yep

[twin juniper]

So, What should i enter :/

[west mason]

7777 in all the four fields

[twin juniper]

Should i put nothing special in those?

@west mason ?

[west mason]

no, no need

[twin juniper]

Ok, Done, Shall i now add 7778?

[west mason]

Yep

7777 is dedicated servers, 7778 is listen servers

[twin juniper]

Ok, Done added, So now what will this do?

I know it will allowed people join through my wifi, But how to make them join the dedicated, And I don't got server list

[west mason]

server list?

[twin juniper]

Waitttttttt, is it my router IP i should enter?

I mean, People to enter

[west mason]

From the external world, your router IP is the same as your pc IP.

[twin juniper]

CUs i can acces with 127.0.0.1, But people would probaly not be able to?

My router don't got a 1 at the end :/

[west mason]

you should probably read up on some networking

start trawling wikipedia

https://en.wikipedia.org/wiki/Port_forwarding
https://en.wikipedia.org/wiki/Network_address_translation

[twin juniper]

Yes, But my only question is, If a player start a game, And i got my server running, How would he be able to join

[west mason]

By entering your public ip that you port forwarded from your router to your pc

The issue is that without knowing what is a NAT, and the difference between private, lan and public IPs, you're getting confused

[twin juniper]

So public ip+the port that i just port forwarded

[west mason]

Ye

but there's a billion things that can go wrong in those things

[twin juniper]

Ye, It took me 17 hours in total to even build a dedicated server, And 3 days, So that why I am soon gived up multiplayer

Why is it refering to a black screen when enter the ip with port 😭

[west mason]

connection issue.

it may be really anything, if you want to actually develop this, you should pick up a networking book

[twin juniper]

@wide spindle I got it working to connect to the server with my public IP, But i didn't had to enter port

[high current]

I'm at devcom, improbable is here showcasing spatialos

I have some questions, but I thought I would check in here, in case any of you guys have any questions about Spatial

[west mason]

It does really look interesting!
Does spatialos offer a plugin for easy UE4 plug-in?
Does it support UE4 replication or all network code has to be custom-written?

[high current]

Yes to both

It is a GDK for Unreal

[high current]

So mostly basic stuff, but I asked around how much native support are they going for

And they pretty much want to require no extra knowledge from the developer on the front end, when dealing with single server instances

They have multi server and database structure, which they are rolling out soon, but that would require custom rpc logic n so on

They plan full native support of the cmc soon

But are not doing anything to help prediction or vehicle replication or physics for that matter anytime soo

Tho they are aware of it's issues

Oh and they provide matchmaking

That's all I gathered

Their stuff is open source under MIT

[hollow arrow]

I have Spawned A replicated character And passed my player controller as owner, now the client RPCs on this character doesn't wanna call server RPCs at all though I'm the owner .. Note that i'm not possessing this character

[narrow prairie]

so ur not actually controlling the character?

when u try possess it can u do rpcs like intended?

[opaque flicker]

@narrow prairie I'm Mostafa1928 >> I don't want to possess the character cuz i'm already possessing another pawn, I just wanna be able call RPC events on this character here's the sequence

My possessed Pawn Does Input >> calls Client RPC on another character which I own too >> then This client RPC should call RPC to server on the same character
Last step doesn't work, Means client RPC doesnt wanna call Server RPC on the same character though I'm the owner of it !

Did i miss rules about ownership ? lol

[pearl pollen]

Can AnimNotifyStates have server-only functions?

[opaque flicker]

@pearl pollen If the animation that has the notify runs on the server then yes, you can branch with (Is server)

[pearl pollen]

The animations are not replicated on the server but I heard anim notifies can fire anyways

The animation does nothing but the server still runs through the animation to fire any notifies that are there. Is that a false information?

What I'm having problems with is creating a function with UPROPERTY(Sever,WithValidation,Reliable)

It just doesn't compile at all

Inside the AnimNotifyState class

[narrow prairie]

@pearl pollen when there is a mc animation

server does the animation aswell

with a event notify

u can make a run on server event to handle the stuff u want

for example a line trace

[pearl pollen]

What is mc?

[narrow prairie]

mc= multicast btw

not e=mc2

[pearl pollen]

Oh

Ok

What if I just called play montage on the server when animations are not replicated?

Will it still fire?

[narrow prairie]

should only be ran on server

u need a multicast for everyone to see the animation

[pearl pollen]

It will be called from within GameplayAbility

So it should be ok

[narrow prairie]

that shoudnt matter

[opaque flicker]

@pearl pollen Look, if the animation runs only on the owning client then yes you can call the server via the notify (Just put the server function in the character and call it from the notify event in the animation blueprint)

is this clear ?

[narrow prairie]

isnt multiplayer about to see both animations?

[pearl pollen]

Yeah it's clear, I know that

[narrow prairie]

im a bit lost why would u run on owning client

[pearl pollen]

I'm working on a system that would take the load off of the server when it comes to playing animations but would still enable responsive collision tracking

[narrow prairie]

that goes beyond my knowledge.

[pearl pollen]

So I don't want for the server to actually play any animations on it but still fire anim notifies

[narrow prairie]

im srry

[pearl pollen]

@opaque flicker The animations would be launched from the server, just not played on it

[opaque flicker]

it @pearl pollen It can't trigger notifies if it doesn't run animation >> so to bypass this since no animnation running on the server you will need this animation to run on the owning client and when the notify triggers on the owning client you will then call a server RPC in your character.

[pearl pollen]

Okay thank you for explaining

[opaque flicker]

@pearl pollen did this solve this issue or u meant another purpose ?

[pearl pollen]

In the meantime I managed to write a function that compiles. It all works but I don't know whether it works the way I need or not

I mean

For my game to work I need to have Run Dedicated Server checked

Otherwise it just crashes, that's just the way my server base is made

And I'm not sure how can I test what I just made

Because I get all of the apropriate messages and all seems to be working

But I don't know whether it's from the server or just the client

Wait, I have an idea

[opaque flicker]

@pearl pollen if you using C++ you can access the print string function through UKismetSystemLibrary ?

this will print and show weither it's called from server or client

[pearl pollen]

That's even better .-. Thank you

[opaque flicker]

yw bud

[pearl pollen]

Hmm... What I do runs only on the client when I multicast but it runs on server when I state for it to run only on server

On multicast it should basically run on both, right?

[opaque flicker]

@pearl pollen Multicast will run on both server and client if called from SERVER

and multicast will run only on client when called from owning client !

[pearl pollen]

Okay found it right at the moment you responded 😄

I've tested everything

I might have not been clear enough by what I mean not playing animations on the server. I meant not updating bone locations

It all works just fine 😄

Right now only my validation method is messed up because I only have return true;

xD

So yes, the anim notifies fire on the server even tho bones don't move at all 😄

[twin juniper]

What should i enter in Private IP address for my dedicated server, I know that the port should be 7777, But not what to put in the middle

[narrow prairie]

that removal of the last digit on local ip is strong though

[twin juniper]

😂

Is not my local, Cus that one have 2 more numbers on the end, And when i was gonna map forward it, It was there by itself

[narrow prairie]

but without joking, we have no clue how u configured ur network/server. and or router setup

i would suggest run a cmd prompt

ipconfig /all

[twin juniper]

Well what kind of IP should i use?

[narrow prairie]

to find the correct adress the dedicated server is using

i have no glass ball m8

[twin juniper]

Public, Local, Private ?

[narrow prairie]

is it local dedicated server?

public

we have no clue man

did u rent a server?

do u have it at home

[twin juniper]

No, dedicated

Main PC

[narrow prairie]

so whats the ip adress of ur computer?

its prolly the 10.0.1.X adress

[twin juniper]

Well IP of what?

Local, Public or what

IPv4 ?

Ill just hirer someone to help

[sharp zealot]

Dose anyone know how to create a camera system for two charater?

like this https://wiki.unrealengine.com/Creating_a_shared_camera_for_multiplayer_games

[brittle karma]

i have spawning issue, sometimes two players die at the same time and they have the same checkpoints to respawn to the map, so one can spawn but the other fails, is there any efficient way to handle the situation?

[royal isle]

@brittle karma you can add these spawn parameters so that the engine will try to adjust the spawn location if the specified one is occupied.

FActorSpawnParameters SpawnInfo;
SpawnInfo.bNoFail = true;
SpawnInfo.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AdjustIfPossibleButDontSpawnIfColliding;

If this doesn't work then you can write your own collision test and adjustment logic before spawning the player.
You can also set the override to always spawn even if colliding but that might cause some weird bugs.

[worthy perch]

Hmm, didn't notice bNoFail, that's a pretty weird one.

[brittle karma]

@royal isle thanks

[brittle karma]

@royal isle one question, im using RestartPlayerAtTransform() in game mode, not SpawnActor<>() , can i still use that SpawnInfo?

[gleaming vector]

argh

[royal isle]

No, not with this method

[gleaming vector]

why is the PlayerStart code so butts

[royal isle]

RestartPlayerAtTransform() calls the default spawn logic of the gamemode whereas SpawnActor<>() is more of a manual way of spawning

[gleaming vector]

dear epic: why doesnt the spawn point have a method for filtering spawns

[royal isle]

Ye spawning is nasty, I had a lot of cryptic collision errors when I made a spawn volume, they should do a navmesh styled spawn area thing imo

[brittle karma]

how can i handle this tho?

i was thinking of disable collision for some seconds, then enable again, but what if players collide together when enabling the collision, it will be messy i assume

but its like the same way cars respawn to map in most of the car racing games

[last depot]

Hey guys

i am having an huge issue when trying to run a developer dedicated server

so i keep getting this error even when running test server or the shipping server

Warning: Unable to load package (E:/UnrealEngine/Engine/Content/Animation/DefaultAnimCurveCompressionSettings.uasset). Package contains EditorOnly data which is not supported by the current build.

I have the exe in with the cooked content and packaged game

but it still fails to load

even with shipping content

Any ideas

[teal sphinx]

cant wait to get into ue4 multiplayer blueprints

[meager spade]

..

[lucid plinth]

Does anyone implemented "quality-of-service (QoS) beacons to measure player latency to Azure" in playfab multiplayer servers ?

[spiral saffron]

Is there a way to handle a situation when you need to call RPC on owning client from server, but your client instance is not setup yet and the RPC runs on server locally?

[brittle karma]

im using GM's RestartPlayerAtTransform() function to re spawn the player into its latest checkpoint, sometimes there is a condition which two or more players want to spawn in that specific spot at the same time. only one of them spawn successfully. any idea how can i manage this situation? fyi. im using wheeled vehicle

i found this function findplayerstart is this gonna be useful in this case?

[upbeat hound]

Has anyone faced the issue where visibility function binding (for a widget inside the HUD widget) works on clients, but not on the listen-server?

[brittle karma]

HUD is only available in local, nothing to do with server or client

check if u set the values on server and they should be replicated

[upbeat hound]

Yeah, in "owning client" I set a bool variable in this sub-widget that I check in the visibility binding

When I print the value, in the client, it's true, and the widget is correctly visible

When I use the client on the listen-server, it prints Server: true, but the widget is not visible

I tried printing this bool inside the binding function, I got something strange-ish, I got 3 Server prints in the log, two of them is true, the third is false

for every tick

[twin sable]

does anyone know if array replication is efficient. will unreal send the whole array every time a change is made?

[brittle karma]

@twin sable i guess array is fully replicated, TMap is not

[twin sable]

what do you mean fully replicated? like only the changes are sent or the whole array is always sent?

[worthy perch]

I think general consensus is that only the change in the array is sent. i.e. not the whole array.

But you really should test and report your findings.

[bitter oriole]

I looked at the code in detail once and I'm pretty sure TArrays are replicated in an efficient manner

[twin juniper]

any idea why I am having difficulty changing material ?

events are on gamestate btw

it works fine on the server but clients cant see it

I also tried multicasting as well to execute it locally but still a no

[narrow prairie]

try change material with a repnotify

seems that works for me

[twin juniper]

well I tried going for it as well

no change

I executed the function via input as well

it doesnt change anything

[narrow prairie]

make the change be ran on server

and repnotify

change material what u want

isnide the notify

that should work man

i got it running here

[twin juniper]

nope I couldnt get it to work

ugh Im confused

I made the change in repnotify as well and yet It doesnt change the material on the clients

I change material on the Server side

should I try do it locally for everyone or smth

[narrow prairie]

hmm

same here...

wtf

letmme check

[twin juniper]

yeah I tried exploring on the net and its strange

I tried calling jump function, where the material change happens and everyone sees it just fine

but its not acting as expected when changing materials

ughh

[narrow prairie]

i have the same issue

event beeing called fine

texture not beeing changed

strange :S

1st i thought it had to do with material ids

[twin juniper]

yeah

I will try to make it all locally but executed from server

couldnt find anything useful online

[narrow prairie]

ok

got it

this input is beeing called from player controller

now i have to check notify btw

because that should work

ye

dont even need the multicast

just make the set material on rep notify

and then the change texture on mesh there

make sure u have the correct material id's

i just had this btw :S

same code

now it works

with the rep notify

rlly strange though. it was the same code i had earlier and it didnt work.. and then suddenly it works

[twin juniper]

yeah sometimes it does that

I will try that

thanks for your time 🙂

[solar stirrup]

How bad of an idea would it be to put the shooting actions inside the movement component as a move?

[narrow prairie]

sounds quite bad

na i dunno man.

[graceful cave]

i think UT does something like that to keep the clientside firing timer synced with the serverside timer

but it wouldnt store the actual fire event

[meager spade]

@brittle karma http://www.interkaos.com/grabs/Discord_ni7OQPbYe0.png TMap's are not replicated at all.

he was asking if TArray was efficient 😄

[solar stirrup]

What about fully putting the shooting inside it? Since it's got prediction and replay, why shouldn't I just use the movement component's queue instead of making my own? @graceful cave

[meager spade]

@solar stirrup i think @chrome bay did that

or someone did, and said it worked well

[brittle karma]

@meager spade i know but once i was trying to use TMap and after like 3 hours i noticed its not replicated so basically it was a warning 😄

[meager spade]

if you want tmap like function

we handled it via a Struct of Arrays

[solar stirrup]

Aight I'll try it out and see

It's simple fps shooting anyway

[brittle karma]

yeah i saw that, pretty wise

[meager spade]

two arrays in a struct, and use that as a TMap replacement

[graceful cave]

id think it would be a good idea just to reset the fire timer for clients but not for resending the input

[solar stirrup]

If I use the movement component for shooting, technically the client and the server will both get the same conditions when they start shooting

so it should be pretty good, coupled with rewinding for shots

Although I do have a question, how does one rewind for non-raycast shots, things like weighed projectiles, you can't really rewind can you? you just sync it with when the client shot right?

[meager spade]

you dont need to rewind projectiles

projectile collisions only happen on server

if the server says they missed, they missed

its one of those things

i see it in overwatch a lot when i lag and throw a mcree stun grenade

my screen i hit the guy but it never registered at all

yet hitscan shots seem to hit sometimes when i was sure i missed

[chrome bay]

Shooting in the move comp is a pain, I never did it personally as it can't work for my project

UT's setup is very specific to UT

[meager spade]

someone here did it

[solar stirrup]

Why is it a pain?

[chrome bay]

Because it's a terrible system for flexibility

It only works in UT because they specify per-weapon where the shots come from in relation to the character

It also needs certain things to happen in the right order like equipping, the weapon firing state machine etc.

[solar stirrup]

yeah

[chrome bay]

It's horrendously convoluted so unless you need it don't bother IMO

I.e, if you're making a 120Hz twitch shooter that will be a garaunteed esport in 2 years

For projectile "prediction" you wind them forward in time

[solar stirrup]

forward to match the client's latency right?

well at least, when the client "thinks" he shot

on their view of things

[chrome bay]

On the client you fire a fake one immediately. When the server receives it they wind it forward because that's when the client fired

[solar stirrup]

yeah

logic

[chrome bay]

When the client gets the server-auth version, they wind it forward 2x that because that's roughly when the client fired

Also means you can't really use replicated movement

Hence UT also has it's own projectile movement replication

All of it's authoritive projectiles are net temporary

[solar stirrup]

So how would you do replicated shooting without using the movement component?

[chrome bay]

You can use a movement component

Just not the default actor movement replication

Because as soon as the client gets an update it'll override whatever it's simulated locally

I dunno, I rolled my own system for projectiles which is better IMO

[meager spade]

fire a shot, on the client, tell the server who you think you hit, server runs the same trace, checks if you have a hit client sent into the server, server then checks to see if you would have hit that client by re-winding its position, and having a bit of a extra box around the supposed hit

[chrome bay]

Yeah hitscan is much easier for sure

[meager spade]

if server agrees, tell the client the hit was success

client then shows hitmarker 😄

[chrome bay]

And awards MLG points

[solar stirrup]

Wait wait so I technically could put a second movement component on my character and use it for shooting?

[meager spade]

no

[solar stirrup]

oh guess I misunderstood

[meager spade]

you save the positions on the pawn

in an array

these are your "rewind" positions

then you need to get the rewind time, then you can get the position at that time

[solar stirrup]

how do I sync shooting on the client and server?

[meager spade]

client fires, server fires

[solar stirrup]

as in, how does the server know exactly when I start shooting, and exactly when I stop

[chrome bay]

it doesn't

[solar stirrup]

RPC?

[meager spade]

mine is controlled via states

[chrome bay]

Oh nvm

I thought you meant as in timing

[meager spade]

so i tell the server i started firing, i tell the server i stop firing

thats all

[chrome bay]

Yeah mines the same

[meager spade]

i have states, and firing modes

state is just a enum of weapon state (Inactive, Equipping, Active, Unequipping, Reloading, Firing)

then FireMode is a UObject, which handles the actual weapon fire

weapon class actually has no firing implementation, apart from Start and Stop Fire

and that just forwards off to the FireMode

[chrome bay]

You're using GAS for that too right? Like the base weapon system?

[meager spade]

not really, per say, i use GAS to start/stop the weapon fire

[chrome bay]

Ah roger

[meager spade]

weapons are handled themselves

then i activate a ability on client when client thinks he hit something

[chrome bay]

I'd love to see what UT would do now they have GAS and all the fortnite stuff to lean back on

[meager spade]

which then tells the server i think i hit so and so, and i apply effects, if server disagrees, i roll back

[chrome bay]

Which direction they'd go with it

Ah roger

[meager spade]

actual hit marker is not predicted

and only shows if server sends a clientrpc back

the hitmarker is true validation of a hit

[solar stirrup]

So the GAS is a good thing to use for shooting too? Is there anything it cannot do lol

[meager spade]

can't cook a decent meal

but its pretty powerful

if used properly

look at Fortnite

everything in PVP is using GAS

[solar stirrup]

Damn

Time to work some more on using GAS

[meager spade]

from the mechs, to hoverboards, to ballons, to weapons. Anything destructable or buildable like walls/buildings etc

[solar stirrup]

Although I wonder why you'd use it for destructables

at least, how you'd use it

[meager spade]

🤷

walls can be healed

and destroyed

they might not have a ASC

but they respond to effects

[chrome bay]

You can apply GE's to stuff without an ASC?

[meager spade]

no you cant

my bad

the asc's are probably lazy loaded

as in they are only loaded when they need to be

[chrome bay]

I think that's what they do in fortnite yeah, create them on demand

god it sounds horrible though

[meager spade]

so if a wall never gets shot, it never has an asc

[chrome bay]

I mean it works for them so yolo.. but still

[meager spade]

tbh

there could be a lightweight ASC

ASC should be split

a basic ASC, and a heavier ASC

depending on what its being used for

[chrome bay]

The thing I don't like about GAS is the attribute stuff, but that's kind of essential to how it works so bleh

[meager spade]

attributes are pretty powerful

only downside is they are floats

so you have to do everything based on floats

[chrome bay]

yeah

[meager spade]

and "Effects" feels like a pretty bad name tbh

makes people think of Visual Effects

when its not really, thats what Cues are for

[chrome bay]

Yeah definitely

[brittle karma]

anything wrong here ? i have used this before and it worked fine, now editor crashes after compiling this

    FTimerDelegate CollisionDelay;
    CollisionDelay.BindUFunction(this, FName("Multicast_ChangeCollisonPreset"), GetMesh());
    GetWorldTimerManager().SetTimer(CollisionHandle, CollisionDelay, 3, false);

im curious if its something related to that multicast function

[meager spade]

still cant get my recoil system working

i prefer BindUObject over BindUFunction

and dont ever bind RPC's

bind it to a function, that calls the multicast

for safety reasons 😄

[brittle karma]

ok then.🙏

[twin juniper]

I’ll give 1$ for whoever download my game and test if my dedicated server work

[meager spade]

lol

im good thanks 😄

[twin juniper]

I got no friends :/

[unique thunder]

Any idea why a small-ish (grenade) physics object glitches in multiplayer but not in offline? When it hits the floor, it just disappears, or flies into the sky, sometimes it jumps around in mid-air. Other objects don't seem to do this

[brittle karma]

@meager spade i moved the timer from constructor to BeginPlay and it works fine now,

[meager spade]

yeah never do that either

[brittle karma]

why ?

i called a non-Rpc in constructor(with timer), it cuzed editor crash

[sharp zealot]

anyone know how to make a auto adjust camera for two characters?

[twin juniper]

when i call servertravel to my maps i get this wierd thing where it spawns like 10 of my character floating in the air doing nothing and i don’t know why please help

[pearl pollen]

I have a question. Do I need to have a replicated function marked as const in order to compile it? I have this so far:

//MyClass.h
UFUNCTION(Server, Reliable, WithValidation)
void Function() const;

//MyClass.cpp
#include "UnrealNetwork.h"
void UMyClass::Function_Implementation() const{ //body}
bool UMyClass::Function_Validate(){ //body }```

Of course that's simplified

[solar stirrup]

nope

[pearl pollen]

The code that I have doesn't compile

When I remove the const

[solar stirrup]

doesn't need to be const

well show your code

[pearl pollen]

The function isn't even called anywhere

[solar stirrup]

still needs to compile it

so if you have an error in your code regardless of whether it's being called or not, it'll fail to compile

[pearl pollen]

Let me check something

[pearl pollen]

This is the .h file

#pragma once

#include "CoreMinimal.h"
#include "Animation/AnimNotifies/AnimNotifyState.h"
#include "MyClass.generated.h"

/**
 * 
 */
UCLASS()
class MYPROJECT_API UMyClass : public UAnimNotifyState
{
    GENERATED_BODY()
protected:
    UFUNCTION(Server, Reliable, WithValidation)
    void Function();
};```

I'll post .cpp and error list in a sec

[regal bone]

Shouldn't it be bool UMyClass::Function_Validation ?

[pearl pollen]

This is .cpp

#include "UnrealNetwork.h"
#include "MyClass.h"
void UMyClass::Function_Implementation() {

}

bool UMyClass::Function_Validate() {
    return true;
}

[empty axle]

Validate is the correct form

[regal bone]

ok then that means https://docs.unrealengine.com/en-US/Programming/UnrealArchitecture/Reference/Functions/Specifiers/index.html needs an update

[pearl pollen]

Severity    Code    Description    Project    File    Line    Suppression State
Error    C2511    'void UMyClass::Function() const': overloaded member function not found in 'UMyClass'    MyProject    Intermediate\Build\Win64\UE4Editor\Inc\MyProject\MyClass.gen.cpp
Error    C2671    'UMyClass::Function': static member functions do not have 'this' pointers    MyProject    Intermediate\Build\Win64\UE4Editor\Inc\MyProject\MyClass.gen.cpp
Error    C2352    'UObject::FindFunctionChecked': illegal call of non-static member function    MyProject    Intermediate\Build\Win64\UE4Editor\Inc\MyProject\MyClass.gen.cpp
Error    C2511    'void UMyClass::Function_Implementation()': overloaded member function not found in 'UMyClass'    MyProject    Source\MyProject\Private\MyClass.cpp
Error    MSB3075    The command ""C:\Program Files\Epic Games\UE_4.22\Engine\Build\BatchFiles\Build.bat" MyProjectEditor Win64 Development -Project="MyProject.uproject" -WaitMutex -FromMsBuild" exited with code 5. Please verify that you have sufficient rights to run this command.    MyProject    C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.MakeFile.Targets

And here is the errors I get

Totally bonkers imho

Fixed the validate function

I mean the code snippet here 😛

No idea why it's asking me for a const function

Also the last error (the permission one) is irrelevant, just happening always when something is wrong with the code. Compilation doesn't pass - I get this error + something else so it can be ignored

[empty axle]

It looks totally fine for me, I can't see any error. Did you try to regenerate project files and rebuild project?

[pearl pollen]

I'll try

No effect. Doesn't even compile on a brand new C++ project. The same list of errors: https://media.discordapp.net/attachments/391192915063603211/613079123262308465/unknown.png

Changed the parent class to AActor for testing purposes... It went through

Could it be that UAnimNotifyState causes it to fail?

Argh crap yeah I got it... Replicated functions start from AActor... Can't create them in UObject subclasses :/

[meager spade]

you can replicate in UObjects

but they need an actor channel

also should post the output log not the error log

also AnimNotifies should not do RPC's/Replication, that should be handled by whatever actor is running the animation

[pearl pollen]

Okay gotta have to do some moving

So basically what I have to do is delegate my function to the actor, am I right?

[fleet raven]

the reason it wants the function to be const is that UAnimNotifyState is UCLASS(const)

(ignoring that creating an RPC in it won't work anyway)

[pearl pollen]

Actually it did when I made this function a const 😛

It properly worked when called on multicast

[fleet raven]

it won't call it on the other side

[pearl pollen]

?

[fleet raven]

because this object doesn't have the remote function stuff set up

[pearl pollen]

Actually I need it to run on the server only

[fleet raven]

well, if you called it on a client, that wouldn't have worked either

[pearl pollen]

Can I just call it on the server then and will everything work properly?

If it's supposed to be only run on the server?

[fleet raven]

you can just make a non-rpc function and call it on the side you want it to run

[pearl pollen]

Pseudo-authority check then?

I want to prevent it from running on the clients. They have their own stuff responsible for handling my problem

I want to separate client-side and server-side logic

[solar stirrup]

MyClass.h should be the first header included btw @pearl pollen

at least, UHT expects that

[pearl pollen]

So I guess a simple

if(MeshComponent->GetOwner()->HasAuthority())

would remove the requirement of UFUNCTION(Server,WithValidation,Reliable) and just leave UFUNCTION(), right?

[fleet raven]

uh

[pearl pollen]

Thank you @solar stirrup by the way. It's worth knowing

[fleet raven]

you don't use rpc to "prevent it from running on clients"

that doesn't make any sense

the purpose of rpc is "magically invoke this function on the other side, from this side"

[pearl pollen]

The validation function was magically preventing the clients from running it 😛 But I get the point

So is what I wrote just now a correct option or should I approach it differently?

[fleet raven]

no idea, depends on the context

usually you'd just not call it on the wrong side

[pearl pollen]

Both the server and the client run the anim montage

And I want only the server to receive the notify

Or handle it

[thin stratus]

if(Role == ROLE_Authority)

[fleet raven]

then I guess you'd want to put this branch in the earliest place you can

[thin stratus]

Yus

[pearl pollen]

Does the UAnimNotifyState have the Role member?

I see it from the AActor up

So I guess I have to check if the actor that called it has authority 😛 I'll manage

[thin stratus]

Your AnimInstance usually sits on an Actor

Yop

[pearl pollen]

Or I can get the Actor from the mesh 😄

One step less

Mesh->GetOwner

[thin stratus]

AnimInstance should have GetOwner too?

[pearl pollen]

I don't get the AnimInstance straight away

And I get the mesh as a parameter in the function

[thin stratus]

Does the animNotify happen inside of that?

Idk how it's done in C++

[pearl pollen]

It's an AnimNotifyState

It has a whole separate class

[thin stratus]

Ah, right the "new" thingy

[pearl pollen]

Exactly 😄

I already did that with it so it should be a piece of cake

Thanks for help everyone :3

And @tropic falcon There is no point in server-only visual effects

Nobody will be able to see them

They need to be replicated to clients in order to be seen

Or of course you can do something that is invisible for you and you just get blinded randomly walking on an open field 😄

That would be how a server-only smoke grenade would work

No smoke cloud, no stuff at all, you just randomly get blinded since you walked into a spot on the server where the grenade exploded

[grizzled stirrup]

Do you need to include "Net/UnrealNetwork.h" in any class that uses GetLifetimeReplicatedProps() or only the parent class?

I ask because my derived class works fine without the include

But I'm not sure if it's some kind of silent error that could bite me in the ass later

[meager spade]

Unity build might be including it

somewhere

but normally yes you need it

[grizzled stirrup]

Ok thanks

I'll include just in case then

[meager spade]

best way is to disable unity build

it will throw all the include errors

[twin sable]

does tick get called on replicated actors?

[meager spade]

and then you can fix up your code and include the proper includes

@twin sable tick is called on actors that have tick enabled

[grizzled stirrup]

Oh that's great, so UE4 is including things for me at compile time?

I'd prefer to only have the correct includes

[meager spade]

why would replicated/non replicated make a difference

[grizzled stirrup]

And know if something is missing

[meager spade]

no your other files are being included into one big file (unity file)

and sometimes that contains what is needed already included

so another file of yours might have UnrealNetwork.h

and your satisfying the requirement with Unity build

[grizzled stirrup]

Ah I see, yeah lots of files do in that case

If the same file is included twice, I assume the compiler is clever enough not to duplicate the code?

[meager spade]

#pragma once helps

though it cant always help with circular dependencies

[grizzled stirrup]

Thanks! I gotta learn what these mean

In general though it seems to be pretty fussy about the correct includes which is good, this is the first time I'm noticing a necessary include not being required

[hoary lark]

@tropic falcon you need to ensure any particle generators are all using the same seeds somehow so they all generate the same random streams

[weary saffron]

Hey guys!
How can I test the multiplayer build on my PC?
I want to run two copies of the game.

[agile basin]

hey guys im wondering if i want to make offline splitscreen co-op do i need to do any of the replication stuff or can i just basically turn any single player project to local mp

[bold latch]

@agile basin with local multiplayer, you shouldnt need replication.

[agile basin]

@bold latch oki thx will then check later how to do the process

[spiral saffron]

What's the proper way to move player to spectating pawn using framework? My code makes it crush in PC::OnRep_Pawn() as controllable pawn is NULL

PC->ChangeState(NAME_Spectating);
if(PC->Role == ROLE_Authority && PC->PlayerState)
PC->PlayerState->bIsSpectator = true;

Setup: I've inherited AGameMode and used ReadyToStart/EndMatch methods to explicitly define my match rules. Before MatchStart players possess spectating pawns automatically, as well as playing pawns on MatchStart. However MatchEnd doesn't make them spectating (it shoudn't I suppose) and code above crushes everything.

[real yacht]

how can i disconnect player controller when pawn is dead

i want to disconnect player controller, or destroy

[grizzled stirrup]

Ok I've wasted almost a full day on this issue and it's really escaping me: basically I made an overridden version of MatchState in one of my GameModes to add two simple extra states in. It all transitions fine and moves through the new states as expected (all it's really doing is adding another 3 second delay before actually respawning). However for some reason, human players can't respawn due to this check failing in the GameMode if (PlayerCanRestart(PC) == false)

The strange thing about this is that if I deconstruct AGameModeBase::PlayerCanRestart() and do ALL of the checks individually, it works fine and the player can respawn just like he did before

But for some very odd reason, simply adding that 3 second delay is causing this particular function to fail as on other modes without the delay, the check passes fine

Any ideas of why this might be? Going crazy trying to understand what could possibly cause it

        if (PC)
        {
            if (MustSpectate(PC))
            {
                return;
            }

            if (PC == nullptr || PC->IsPendingKillPending())
            {                
                return;
            }

            if (!PC->CanRestartPlayer())
            {
                return;
            }

            if (PC->PlayerState)
            {
                if (PC->PlayerState->bOnlySpectator)
                {
                    return;
                }
                else if (!PC->HasClientLoadedCurrentWorld())
                {
                    return;
                }
                else if (PC->PendingSwapConnection)
                {
                    return;
                }
                else
                {
                    UE_LOG(LogTemp, Error, TEXT("PASSED ALL PS CHECKS!! :)"));
                }
            }

            // It gets all the way here but FAILS on this check even though the previous checks are doing exactly the same thing (as far as I can see), why??
            if (PlayerCanRestart(PC) == false)
            {
                return;
            }
        }

[winged badger]

there is a slight difference between

if (!PC->CanRestartPlayer())

and

if (PlayerCanRestart(PC) == false)

[grizzled stirrup]

Ok thanks will try checking with == false

[winged badger]

shit == false

the there isn't

[grizzled stirrup]

I'm not sure I understand?

The there isn't?

[winged badger]

the thing is surprisingly hard to read btw

[grizzled stirrup]

Yeah it's a nightmare of checks. I tried == false and same result

It passes

But the function that bundles it all up at the bottom doesn't

[winged badger]

            if (PC == nullptr || PC->IsPendingKillPending())
            {                
                return;
            }

if you have this ontop

no need for if (PC)

[grizzled stirrup]

Yep I know was being extra sure

Just to make sure I wasn't somehow missing something

I tried to copy the checks in the function line for line

[winged badger]

don't be, you're being inconsistent

while being extra sure

[grizzled stirrup]

I will delete most of this later I just want to know why their function is returning false and doing the checks manually is true

[winged badger]

its the engine function?

[grizzled stirrup]

Yes

PlayerCanRestart(PC)

In AGameMode

My checks are all the same things just done manually

Hence the unnecessary double PC check

Also keep in mind that without an extra 3 second delay before respawning happens PlayerCanRestart(PC) does return true

Just tested again with every manual check being extremely explicit (no ! and any bool being == true or false)

Same result

AGHHH found it!!

I had overridden PlayerCanRestart(PC) and it didn't take into account the new states added.....

I'm stupid

Sorry

[winged badger]

you do need to override IsMatchInProgress() i think

[grizzled stirrup]

Yep that was it

I didn't add my states

It's only Started (or ActuallyStarted) which is part of my base MatchStates

Didn't add the new RoundWaitingToStart and RoundStarted

Thanks for the help!

Just out of curiosity, should I avoid using ! when checking booleans?

[winged badger]

i don't

what you should definitely avoid however

is mixing if (!SomeCondition) and if (SomeCondition == false)

same goes for checking nullpointers

[grizzled stirrup]

Got it, that's inconsistent

[winged badger]

one or the other, and stuck with it

[grizzled stirrup]

Thanks will do

[eternal briar]

In Multiplayer game mode, OnPostLogin executes before BeginPlay for server. Is this expected behavior?

[thin stratus]

@eternal briar I would say so

[eternal briar]

Ty for reply, I am a bit confused here. I was thinking the game mode should only be able to accept connections after BeginPlay, even if it for the server.

[grizzled stirrup]

If you need different UI to be shown depending on the state of the match (like Match Starting In 5...4, Round Starting In 5... etc) would a good way to have the UI know about the state of the match be to have a delegate like so: DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FMatchStateUpdated, FName, NewMatchState); in the GameState?

And have that UI subscribe to it on begin play?

[winged badger]

Syncing network clocks wouldnt suck either

So you dont have to bother replicating anything but the initial timestamp

[fleet raven]

apparently if a server has been running for a few hours, time on it passes slower than on clients

[worthy wasp]

@fleet raven - damn black holes.....

[thin stratus]

@eternal briar Not really no. You can even delay BeginPlay :P

[winged badger]

BeginPlay of what object?

[thin stratus]

Person noticed a ListenServer calls PostLogin before BeginPlay in the GameMode.

[winged badger]

yeah, i delay my beginplay until all players are ready

but at least one will log in before BeginPlay (the host on listen server)

thing is @eternal briar the world dispatches BeginPlay to all Actors in it

[thin stratus]

I think I actually never did anything on BeginPlay that has to wait till everyone is ready

If I need that I usually use the MatchState

[winged badger]

and it won't do that until GameMode tells it to

which won't happen until at least one player is ready by default

on clients, the GameState replicated MatchState, and OnRep causes the client world to dispatch BeginPlay

thats why you get such interesting bugs when you forget Super::GetlifetimeReplicatedProps call in GameState

[thin stratus]

Yop But yeah if you need stuff to only happen if peeps are ready, override the IsReadyToStartMatch function and react to the MatchState going InProgress.

at least that's what I do and it works fine

And everything else, that should just run BeginPlay, should just do that to initialize itself

[winged badger]

i wait until my NumTravellingPlayers is 0

after a seamless travel transfer

[thin stratus]

Yeah for SeamlessTravel

[winged badger]

but with hard traval, there is no real way to tell if player is just logging in or not, unless your match is full

[thin stratus]

I wonder, first connection, can you check if a Player is still loading the level?

Server-side

[winged badger]

on Login?

[thin stratus]

Idk, the ReadyToStartMatch currently works on NumPlayers

[winged badger]

there is a NotifyServerWorldLoaded function in the PC

but i don't know if its called with non-seamless

[thin stratus]

Does NumTravelingPlayers also count connecting clients?

[winged badger]

anyone that has a non-specatator PC on the server iirc

[thin stratus]

Well i'll see. Our ReadyToStartMatch fires to fast if we allow it to start instantly when a Player connects.

Which basicallyl eads to the countdown to be "3... (loadingscreen)..... (loading done, screen gone), 2, 1, GO!"

[winged badger]

there is one oddity in seamless there

[thin stratus]

So the matchstate replicates when the player still loads the map

[winged badger]

it makes sense when you think about it, but if you change the PC class during seamless

[thin stratus]

Even in Splitscreen tbh

This is on connection, not on seamless travel

[winged badger]

NotifyServerWorldLoaded is called from old controller, before the swap

[thin stratus]

Right I will check if I can count connecting players

Or even traveling splitscreen

Cause I dislike the matchState updating when I'm still in the Loading Screen

[winged badger]

yeah, you might be able to "hack" the GS not to dispatch BeginPlay until you're done loading

client side

[thin stratus]

BeginPlay is not the issue

I just have the Countdown Widget listen the MatchState chagning

And the ReadyToStartMatch stuff is checking if "NumPlayers > 0"

Usually we have a ready check

You have to go into warmup to count into that NumPlayers number

But Splitscreen games should start instantly

And that "Instantly" is too instant :D

They count into ue4's Numplayers while they still open the level

[winged badger]

you can tell if its a splitscreen non-networked game