#multiplayer | Unreal Source | Page 513

fossil spoke Dec 30, 2019, 11:53 PM

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If so then you dont need to manage Jumping across the network yourself. The CharacterMovementComponent already does this for you.

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Simply call the Jump function and you should be fine.

cedar finch Dec 30, 2019, 11:55 PM

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@polar lotus Make sure your movement speed is set correctly on all your players. I had a jitter issue where I accidentally was setting walking speed locally somewhere so it was a tad bit out of sync and caused the jitter. Your issue however kinda looks like an animation blending issue but I'm not sure why it would only show up for clients.

weak fog Dec 30, 2019, 11:56 PM

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Anyone know if it's possible to get this value in BP (or C++ even)?

I'm trying to set up my local testing environment to be as close as possible to production, so I'd like to substitute "number of players needed to start the game" (which we get from an API on production) with this number when in local dev

📎 unknown.png

winged badger Dec 31, 2019, 12:01 AM

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possible, yes... how would require quite abit of digging

still path Dec 31, 2019, 12:02 AM

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@fossil spoke yes I am. That is how I originally had it but I found that jumping still caused rubber banding problems. I'll double back and take another look. Thank you!

winged badger Dec 31, 2019, 12:02 AM

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i'd start by looking at editor menu customization stream to figure out what that menu binds to and then how to access it from there @weak fog

weak fog Dec 31, 2019, 12:04 AM

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is stream a technical term here, or do you mean they did a livestream on this topic?

winged badger Dec 31, 2019, 12:12 AM

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there is a livestream on it

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you can also try #editor-scripting

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best chance to find someone who knows how to access it off the top of his/her head

weak fog Dec 31, 2019, 12:13 AM

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ahh okay. tyvm!

harsh lintel Dec 31, 2019, 12:14 AM

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I'm calling GetController of an AI character in a server RPC but returns null

winged badger Dec 31, 2019, 12:14 AM

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that is a weird setup

harsh lintel Dec 31, 2019, 12:14 AM

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seems to be valid on BeginPlay

winged badger Dec 31, 2019, 12:15 AM

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that implies you are directly accessing an AIController from a client

harsh lintel Dec 31, 2019, 12:18 AM

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Hmm

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what if i make a function in the character that uses the controller, idk if that would make a difference

harsh lintel Dec 31, 2019, 12:48 AM

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can't quite find anything on how to access an AI controller

winged badger Dec 31, 2019, 12:56 AM

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Cast<AAIController>(Pawn->GetController()) pretty much

harsh lintel Dec 31, 2019, 1:00 AM

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yeah...

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null

winged badger Dec 31, 2019, 1:03 AM

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it won't work client side, since those aren't replicated by default

harsh lintel Dec 31, 2019, 1:04 AM

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im doing it in a server rpc

winged badger Dec 31, 2019, 1:05 AM

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you should really paste the code and explain what you're doing exactly

harsh lintel Dec 31, 2019, 1:08 AM

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        //AController *ControllerActor = AICharacterForMovement->GetController();
        //AAIController *AIController = Cast<AAIController>(ControllerActor);
        //if (!AIController)
        //{
        //    EndAbility(CurrentSpecHandle, CurrentActorInfo, CurrentActivationInfo, true, true);
        //    return;
        //}
        //
        //AIController->MoveToLocation(HitResult.ImpactPoint);

This is the server rpc

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This might be a question for #gameplay-ability-system, I just remembered that AICharacterForMovement was null until I replicated it, maybe even if it's a server rpc it's not doing it with server data

winged badger Dec 31, 2019, 1:22 AM

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since i have no idea what AICharacterForMovement is there, that code snippet doesn't give me any information

harsh lintel Dec 31, 2019, 1:27 AM

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        const AMXM_BaseCharacter *MXMCharacter = Cast<AMXM_BaseCharacter>(TempAbilityInstigator);
        if (!MXMCharacter)
        {
            EndAbility(CurrentSpecHandle, CurrentActorInfo, CurrentActivationInfo, true, true);
            return;
        }

        AMXM_AICharacterForMovement *AICharacterForMovement = MXMCharacter->AICharacterForMovement;
        if (!AICharacterForMovement)
        {
            EndAbility(CurrentSpecHandle, CurrentActorInfo, CurrentActivationInfo, true, true);
            return;
        }

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        UPROPERTY(Replicates, BlueprintReadOnly)
    const AActor* TempAbilityInstigator;

winged badger Dec 31, 2019, 1:30 AM

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nothing thats called Temp should ever be const

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but unless you paste the entire RPC i can't help you

plush lagoon Dec 31, 2019, 1:32 AM

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Is there a Trick to replicating Scale across all clients?

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O_o

harsh lintel Dec 31, 2019, 1:34 AM

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oh snap let me remove all the comments lol

dapper hatch Dec 31, 2019, 1:35 AM

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@rich ridge I have working on it with a game instance and it kinda works cause my variable "Player Name" survives the level switch but now I have another problem 😕 When I apply the name to the character, it doesn't apply it to the right person... Instead of applying the name to the server (the one that has modify the "Player Name" in the menu, it applies it to the client... its like if it doesn't know which one to to give it to... But how could I define to wich person to give it to? This is what I have done:

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https://gyazo.com/1c927d099441b74e0a70833198a0a12c

Gyazo

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https://gyazo.com/0ea5c75e6ba28de3477f3b1f27a51073

Gyazo

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https://gyazo.com/2e3a053da8df5e006f78aac51084505b @rich ridge

Gyazo

harsh lintel Dec 31, 2019, 1:36 AM

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https://gist.github.com/WuChanGG/57f818f55d656c6758a48d4c18a69e3b

Gist

serverrpc

GitHub Gist: instantly share code, notes, and snippets.

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this is the rpc

winged badger Dec 31, 2019, 1:51 AM

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that TempAbilityInstigator is pretty suspicious

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put a breakpoint in it, see what's what

harsh lintel Dec 31, 2019, 1:53 AM

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alright

vivid seal Dec 31, 2019, 2:18 AM

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@plush lagoon the way I handle scale and character movement variables is by having a RepNotify for each of them called like “ScaleModifier” or “MaxWalkSpeedModifier” and in the RepNotify set the scale or walk speed or whatever to a constant default multiplied by the new replicated modified

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Modifier*

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I’m doing an RPG so buffs can shrink players by affecting the scale modifier stat for example, which gets set on server and replicated and then everyone separately sets their own

harsh lintel Dec 31, 2019, 2:24 AM

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it's most likely a GAS plugin issue, I explained more details there

plush lagoon Dec 31, 2019, 2:30 AM

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ahhh

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thank you so much @vivid seal ^_^

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Yea, i'm doing the same sht but i'm doing it based off stats and various modifiers to increase/decrease the scale depending on what your doing.

twin juniper Dec 31, 2019, 3:31 AM

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Is this correct replication for "dedicated server"?

📎 unknown.png

polar lotus Dec 31, 2019, 3:51 AM

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@dapper hatch I have a C++ base class for everything so I just do this

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📎 unknown.png

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@dapper hatch DUDE IT WORKES

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WORKED

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THANK YOU SO MUCH

cedar finch Dec 31, 2019, 3:55 AM

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I'm still struggling to figure out replication on setting an actors location along a spline. So I was told to use interpolation but It still looks laggy on clients. If I set my timeline to replicate and run the event onServer will that work and be optimized? https://i.gyazo.com/c7e539137ee83bf2a6f49e371373e7d3.png

dapper hatch Dec 31, 2019, 4:03 AM

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@polar lotus your welcome 🙂

polar lotus Dec 31, 2019, 4:14 AM

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Who owns my gun actors if they are spawned in by the server

cedar finch Dec 31, 2019, 4:33 AM

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So to clear my question up; Is using a replicated timeline more optimal compared to using an RPC or a repNofity variable?

tropic snow Dec 31, 2019, 4:37 AM

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[2019.12.27-09.01.04:005][ 94]LogOnlineSession: Warning: STEAM: Session (GameSession) already exists, can't join twice .... how to destroy sessions properly? placed destroyed sessions every where...

ebon nimbus Dec 31, 2019, 4:39 AM

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Is there any additional steps to deal with in regards to the ChoosePlayerStart function inside of the gamemode class, when it comes to multiplayer spawning? The player team numbers are aligned with the spawn tags but no luck

rich ridge Dec 31, 2019, 4:41 AM

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@dapper hatch if you want to maintain names for respective characters then you need to store inside of map

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Instead of single playerName variable

cedar finch Dec 31, 2019, 4:46 AM

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What's the best way to replicate "attachToComponent" ? Do I need to do that on server or can I just run it inside a multicast or what?

dapper hatch Dec 31, 2019, 4:50 AM

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@rich ridge How would I do that?

rich ridge Dec 31, 2019, 5:04 AM

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@dapper hatch if you know Java it's same as that of HashMap<Key,Value>

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In blueprints you can set variable type as Map

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And one more thing as others pointed out yesterday that we can retain values using PlayerState by calling function CopyProperties from PlayerController, please consider that option too for retaining values after level is switched.

twin juniper Dec 31, 2019, 5:08 AM

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I want to start making a multiplayer game is how reliable are older tutorials?

rich ridge Dec 31, 2019, 5:09 AM

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https://docs.unrealengine.com/en-US/Engine/Blueprints/BP_HowTo/WorkingWithMaps/index.html

Working with Maps

Learn how to work with Maps in Blueprints.

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@dapper hatch

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@twin juniper older tutorial are good, the concept for multiplayer game has not changed

twin juniper Dec 31, 2019, 5:10 AM

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ok

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Would i find most updated information in the unreal engine documents?

rich ridge Dec 31, 2019, 5:10 AM

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But you might enconter fee compilation errors because of the classes getting removed or moved to other location

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In case classes got removed they got replaced with better classes

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@twin juniper UE4 documentation is highly rich in information and the people also has good number of wiki pages in different aspects of multiplayer games

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You just need to exploit Google to get your results

twin juniper Dec 31, 2019, 5:17 AM

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thank you.

dapper hatch Dec 31, 2019, 5:37 AM

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@rich ridge How do I use the thing "Copy Property" in my player state?

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is it a node?

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@winged badger

rich ridge Dec 31, 2019, 5:44 AM

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@dapper hatch read UE4 documentation

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Search there

vivid seal Dec 31, 2019, 6:35 AM

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asked this in cpp channel but think it might be more appropriate here

hey i have a few dumb questions:
are TSets replicated? when I google the first result from Epic's docs says "Like TMap, TSet is not replicated" but when i click the link it doesn't actually say that anywhere.

second, if they are replicated, will using .Add() a duplicate element to the set (therefore overwriting a key with an identical key) cause things like RepNotify to trigger or will it be treated as if nothing changed at all?

thin stratus Dec 31, 2019, 8:06 AM

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Afaik, they are not replicated.

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@vivid seal

chrome bay Dec 31, 2019, 11:09 AM

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Sets and Maps are indeed not replicated

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Array is the only container type that supports replication

gray scroll Dec 31, 2019, 2:54 PM

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im setting my timer inside game state on authority... then calling a server event inside game mode which calls an owning client event in player controller to create a widget. When i cast to game state and get the timers value on client it comes back as -1... any idea why?

the variable is set to replicate

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chrome bay Dec 31, 2019, 2:58 PM

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Because the timer doesn't exist on the client, timers are local only, they aren't replicated

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The handle is just a number to identify that timer on the local game instance

winged badger Dec 31, 2019, 3:01 PM

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in most cases, if the purpose of a timer is to create a widget when its done, you don't need it running on authority, but local only

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especially in case of dedicated servers

chrome bay Dec 31, 2019, 3:02 PM

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That is also true, seems like a backwards way of doing something. Client should be managing the state of their HUD locally.

gray scroll Dec 31, 2019, 3:04 PM

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No the timer needs to display on the hud

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So like match starts in 5,4,3,2,1 countdown

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@winged badger @chrome bay

chrome bay Dec 31, 2019, 3:05 PM

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Doesn't matter, the client should still decide to show it or not

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And usually in that case you just replicate an int for the countdown

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Or reuse the same int32 as the match timer

winged badger Dec 31, 2019, 3:06 PM

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for that, the clients just need the information that timer started

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they can count down 5 seconds on their own

chrome bay Dec 31, 2019, 3:06 PM

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Which is also what MatchState is for

winged badger Dec 31, 2019, 3:06 PM

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not easy to hook into that from BP though

chrome bay Dec 31, 2019, 3:06 PM

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Hmm yeah true

winged badger Dec 31, 2019, 3:06 PM

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ideally, you'd override OnRep_MatchState in the GS

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but that is c++

gray scroll Dec 31, 2019, 3:07 PM

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Dang

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So i see two solutions... get just the starting value and then countdown on clients

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Or create another timer on 0.5 secs and then replicate that value to clients

winged badger Dec 31, 2019, 3:09 PM

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there is no guarantee any corrections to the timer will be any more accurate then your initial "CountdownStarted" replication

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given that, its best to let clients count down on their own, that way the 5 seconds will actually last 5 seconds, and won't be affected by any spikes in latency

gray scroll Dec 31, 2019, 3:10 PM

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Ok makes sense thanks

grizzled tide Dec 31, 2019, 5:27 PM

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hi. there is something that i cannot understand

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can you set the port when you host a gem in runtime?

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because if you cant

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how does STUN works?

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i mean, with stun i can get a open port, but how can i use it if when i host a game with openlevel i cant set the port?

jolly siren Dec 31, 2019, 5:40 PM

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FURL has a port property

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You can include it in the options for openlevel

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Assuming you are talking about listen servers

ember slate Dec 31, 2019, 5:42 PM

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How am I supposed to join a game server if the game server and the client are using steam? Is there a specific way or just OpenLevel would work?

jolly siren Dec 31, 2019, 5:43 PM

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With sessions

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https://wiki.unrealengine.com/How_To_Use_Sessions_In_C++

How To Use Sessions In C++

ember slate Dec 31, 2019, 5:51 PM

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So dedicated servers that are using Steam by default creates sessions? Or do I need to create the session first on the servers@jolly siren

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This whole sessions thing is so irrelevant to me cause I have my own match making

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And I already know the IP and Port of the server I should connect to

jolly siren Dec 31, 2019, 5:56 PM

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you can use openlevel then

ember slate Dec 31, 2019, 5:56 PM

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It just kicks me, not sure if the client refuses to continue or the server kicks me

jolly siren Dec 31, 2019, 5:57 PM

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Look at the logs

fleet raven Dec 31, 2019, 5:57 PM

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does the server have the port open?

ember slate Dec 31, 2019, 5:57 PM

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Yes, and when I have steam disabled on clients, it works fine

fleet raven Dec 31, 2019, 5:58 PM

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why enable steam then if you're not using it?

jolly siren Dec 31, 2019, 5:58 PM

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Same question ^

ember slate Dec 31, 2019, 5:58 PM

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Well in future I will enable authorization etc and steam id will be used in game

fleet raven Dec 31, 2019, 5:58 PM

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then just connect through steam too and you get automatic nat punch etc

grizzled tide Dec 31, 2019, 6:05 PM

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@jolly siren i checked FURL. I tried to pass it Using UnetDriver. But Unetdriver is null when i get it from GEngine. if i try to create a new oone with NewObj ir returns null again. So the main question is . how can ir host a listen server using Unedriver?

sturdy saddle Dec 31, 2019, 6:16 PM

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Is there any option to check for like max change in client to server

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currently i have dash move, it works fine on server, but when I try multiplayer clients are being kicked back I think its some anticheat feature

grizzled tide Dec 31, 2019, 6:43 PM

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i had to create a UIpNetDriver

fleet raven Dec 31, 2019, 7:02 PM

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why are you manually creating a net driver

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the engine creates it automatically when you travel to a level with ?listen flag

grizzled tide Dec 31, 2019, 7:09 PM

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because i need to listen a specific port set on runtime

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@fleet raven because Turn

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stun

fleet raven Dec 31, 2019, 7:10 PM

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you can set the net driver class you would like it to spawn in the config

grizzled tide Dec 31, 2019, 7:11 PM

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yes i can

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im using UIpNetDriver

fleet raven Dec 31, 2019, 7:15 PM

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that's the default

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I meant more like you'd be able to derive it and do any custom things you need in there rather than making hacks like spawning it manually

grizzled tide Dec 31, 2019, 7:16 PM

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yes i know

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but

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before extend it to make my custom unedriver

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i need to know to to use it to host and join games

grizzled tide Dec 31, 2019, 9:09 PM

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@fleet raven thank you!

dim parrot Dec 31, 2019, 9:51 PM

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im working on an open world multiplayer game that will be running dedicated servers i am wanting to know how to do individual saves per server so when a player joins a new server they have to make a new character like ARK and Conan does is there a way to do this in blueprints or would i need to use a database like sqlite

grizzled tide Dec 31, 2019, 9:52 PM

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i would use a nosql database

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in any case if each dedicated server is going to have their own savefiles i dont know whats the problem

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if i create a custom unetdriver hw i add it to my config?

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-NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="MobileNetDriver",DriverClassNameFallback="/Script/OnlineSubsystemUtils.IpNetDriver")

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this is not working

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[/Script/Engine.Engine]
!NetDriverDefinitions=ClearArray
+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="OnlineSubsystemMobile.MobileNetDriver",DriverClassNameFallback="/Script/OnlineSubsystemUtils.IpNetDriver")

[/Script/OnlineSubsystemMobile.MobileNetDriver]
NetConnectionClassName="MobileNetDriver"

grizzled tide Dec 31, 2019, 10:46 PM

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CastleVersus is the name of the project

fossil spoke Dec 31, 2019, 11:28 PM

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Anyone know of any examples of restoring an Actor Channel to an Actor thats been Torn Off?

gleaming vector Dec 31, 2019, 11:53 PM

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you can't

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the channel for an actor that has been closed and disposed of

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you'd have to create a new actor channel for it, which would end up creating that actor anew on the client

fossil spoke Dec 31, 2019, 11:57 PM

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Mmm

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I thought that might be the case.

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Cheers.

gleaming vector Dec 31, 2019, 11:57 PM

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no problem

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make it dormant if you plan on opening the channel back up

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that's the point of net dormancy

fossil spoke Dec 31, 2019, 11:58 PM

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Yeah i was going to do that anyway.

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Is there a function that gets called when dormancy changes?

gleaming vector Dec 31, 2019, 11:59 PM

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I believe so, but I can't recall it off the top of my head

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and I'm currently deep in editor graph code

fossil spoke Dec 31, 2019, 11:59 PM

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Ill have a dig.

gleaming vector Dec 31, 2019, 11:59 PM

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silly Epic went and refactored everything related to node context menus

fossil spoke Dec 31, 2019, 11:59 PM

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I tend to stay well away from all the Editor nonsense 😛

gleaming vector Jan 1, 2020, 12:00 AM

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no deprication

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just

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deleted entire types

fossil spoke Jan 1, 2020, 12:00 AM

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I really hate tools programming lol

grizzled tide Jan 1, 2020, 12:01 AM

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@gleaming vector hi. Do you know how yo add a new UIpNetDriver?

gleaming vector Jan 1, 2020, 12:01 AM

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add a netdriver?

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there can only be a single net driver alive

grizzled tide Jan 1, 2020, 12:01 AM

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Yes

gleaming vector Jan 1, 2020, 12:01 AM

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you can create a new type, and then change out which class the engine instantiates

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that's done in the engine.ini

fossil spoke Jan 1, 2020, 12:01 AM

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^^

grizzled tide Jan 1, 2020, 12:01 AM

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I ido that

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Bit Is nota recognizing the new class

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But

gleaming vector Jan 1, 2020, 12:02 AM

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if it's not recognizing the new class, are you sure you set up your script path correctly?

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put that in ``` ```

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so it formats it correctly in discord

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back tick

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`

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above the tab button on us keyboards

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also the ~ button

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and then 3 a the end

grizzled tide Jan 1, 2020, 12:05 AM

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I'm I'm muy phone

gleaming vector Jan 1, 2020, 12:05 AM

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``` like this ```

grizzled tide Jan 1, 2020, 12:05 AM

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Muy phone

gleaming vector Jan 1, 2020, 12:05 AM

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shows up
like this

grizzled tide Jan 1, 2020, 12:08 AM

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https://pastebin.com/GQUECEvy

Pastebin

[/Script/Engine.Engine] !NetDriverDefinitions=ClearArray +NetD...

gleaming vector Jan 1, 2020, 12:08 AM

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ha, sure

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that works

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so

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your first section is where you define your drivers

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second section is where you define your channel classes

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you haven't overriden your driver

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but you did override the channel

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er

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NetConnection not channel

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NetConnection is not the driver

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they are two different classes

grizzled tide Jan 1, 2020, 12:09 AM

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O i sew

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Sew

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Shot this keyboard

gleaming vector Jan 1, 2020, 12:09 AM

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OnlineSubsystemSteam has an example of overriding the driver

grizzled tide Jan 1, 2020, 12:10 AM

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I checked it

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But

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Ir netconnection Is not

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Whats the name?

gleaming vector Jan 1, 2020, 12:11 AM

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i am not sure your question

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overriding the NetDriver/NetConnection and the like is very advanced networking

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I know a few things in there but I usually just go by example

grizzled tide Jan 1, 2020, 12:14 AM

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I created a new class that extended UInetDriver .but i can't find a way that the game use it instead of default UIpNetDriver

gleaming vector Jan 1, 2020, 12:16 AM

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it's the in the first section of the ini that you linked

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you change the ipnetdriver to your classname

grizzled tide Jan 1, 2020, 12:25 AM

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I'm going yo try

distant wave Jan 1, 2020, 1:55 AM

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Hey could anyone give me a better understanding of Random Seeds in multiplayer? I wanna make a shotgun. From what I saw on the web, a random seed with a random stream, basically makes sure that every client gets the same random values when shoots. (also the shotgun should use a VRandCone).

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Is this right?

winged badger Jan 1, 2020, 1:56 AM

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it is, its not necessary for every game type though

distant wave Jan 1, 2020, 1:56 AM

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And if so, shouldn't seed be set somewhere in a game state or game mode?

winged badger Jan 1, 2020, 1:56 AM

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and if you desync at any time

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you'll remain desynced permanently

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ah, no

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should be contained within each weapon

distant wave Jan 1, 2020, 1:57 AM

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But if every player generates a different seed, then how would it be right?

winged badger Jan 1, 2020, 1:57 AM

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otherwise out-of-order packages become more of a problem

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server generates seeds within each actor that requires one and replicates it

distant wave Jan 1, 2020, 1:59 AM

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If you set the seed in a weapon class (shotgun) belonging to Player 1 and then Player 2 also sets his own seed, they would get different values

winged badger Jan 1, 2020, 1:59 AM

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but they would still be synced

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1 seed per shotgun

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created by the server and replicated

distant wave Jan 1, 2020, 2:00 AM

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Would you be able to give me a code example?

half jewel Jan 1, 2020, 2:00 AM

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use seedstream

distant wave Jan 1, 2020, 2:00 AM

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I never used seeds before

winged badger Jan 1, 2020, 2:00 AM

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i don't have one at hand, i decided against syncing spread in my game

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i have client authority for hits, validated by the server

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health is synced across all clients

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but hits are not replicated for simulated proxies

half jewel Jan 1, 2020, 2:01 AM

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nvm if the shotgun entity ever becomes unrelevant for clients seedstream would desync

winged badger Jan 1, 2020, 2:02 AM

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they have just enough information to do a fairly good guess of what the players are actually doing

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and simulate that

distant wave Jan 1, 2020, 2:02 AM

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Alright, then the Seed should be a replicated int. And on begin play of the gun I check for authorithy and if authority I set a random seed?

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Or I set the seed on every shot

winged badger Jan 1, 2020, 2:03 AM

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i would do it as part of the spawn algorithm

distant wave Jan 1, 2020, 2:03 AM

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Oh okay

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So there is no need for RPCs

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Just check for authority then set it

winged badger Jan 1, 2020, 2:03 AM

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no, there is not

distant wave Jan 1, 2020, 2:03 AM

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And it should be replicated

winged badger Jan 1, 2020, 2:03 AM

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again, packet loss is problematic

distant wave Jan 1, 2020, 2:03 AM

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Alright thanks a lot! Happy new year!

winged badger Jan 1, 2020, 2:03 AM

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if your client doesn't get one shot worth of package

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or if it becomes non-relevant

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or if its a late joiner

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seed will be correct, but it will be sampling a wrong element from a random stream from then on

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you can't sync random streams after the fact

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a random stream with same seed results in exact same sequence of numbers

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but once you lose where in that sequence are you, there is no way to sync it back

hoary lark Jan 1, 2020, 2:12 AM

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@distant wave I pass the clients randseed int value in my start firing rpc (or shot fired rpc for single shot weapons)

winged badger Jan 1, 2020, 2:12 AM

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that saves bandwidth only if you roll several randoms per shot

hoary lark Jan 1, 2020, 2:13 AM

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Everything is a trade off

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Pick what you can afford

winged badger Jan 1, 2020, 2:14 AM

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it is a better solution then trying one time seed replication

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as that will desync sooner or later

meager spade Jan 1, 2020, 2:32 AM

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check UT source

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they netsynch the random seed

distant wave Jan 1, 2020, 2:40 AM

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How do you netsynch it?

#

@hoary lark And I still have to set the seed only if Role == ROLE_Authority?

hoary lark Jan 1, 2020, 2:41 AM

#

Whoever starts the event first has to set the seed somehow

distant wave Jan 1, 2020, 2:41 AM

#

My fire function looks like this

#

If the role is less then authority, it calls a Server RPC (which calls the Fire function) and after I close the if statement

#

I do the firing logic

#

So I just set the seed to something random there

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In the firing logic

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Right? @hoary lark

hoary lark Jan 1, 2020, 2:44 AM

#

Are you "shooting" on the local client first?

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(Shoot prediction basically)

distant wave Jan 1, 2020, 2:45 AM

#

Nah everything related to firing is in that function

hoary lark Jan 1, 2020, 2:46 AM

#

You're ok with input delay then? If so then yes but I'm thinking you might want to change this after you experience it...

distant wave Jan 1, 2020, 2:47 AM

#

There is no input delay

winged badger Jan 1, 2020, 2:47 AM

#

If the client doesn't have hit authority, there is a delay

distant wave Jan 1, 2020, 2:47 AM

#

Look have you ever looked at the ShooterGame fire function?

#

That is how I have it set up

#

@winged badger At least no visible delay

winged badger Jan 1, 2020, 2:49 AM

#

visible or not depends on the latency

distant wave Jan 1, 2020, 2:49 AM

#

As soon as the Fire function is called it checks if you are a client and if yes, then it calls the server rpc

winged badger Jan 1, 2020, 2:49 AM

#

if its over 50ms, its visible

distant wave Jan 1, 2020, 2:50 AM

#

Basically the client tells the server to fire for him

#

Anyways

#

We were talking about seeds =)))))

#

Thanks for the help everybody!

half jewel Jan 1, 2020, 2:56 AM

#

i figured it out

#

just use a seedstream seeded with a replicated burst counter value

#

you only need to replicate the burstcounter value and works when things go out of relevancy range too

#

where can i upload stuff? i have a test project you can run

half jewel Jan 1, 2020, 3:13 AM

#

forgot to mention that the client shoots locally too

hoary lark Jan 1, 2020, 3:14 AM

#

Sorry I'm tied up with NYE. If the client shoots first locally, then the client has to generate and pass the random seed to use for the event up to the server. (And if you're only telling the server to shoot for you only, there will obviously be a delay, Zlo is right but maybe the way you have it set up is different than we're interpreting)

half jewel Jan 1, 2020, 3:15 AM

#

it does not look at the project

#

no seed is sent to the server, both just have initial value and use burstcounter to generate the seed

hoary lark Jan 1, 2020, 3:18 AM

#

On my phone rn sadly, but sounds like it'll be a pretty useless solution tbh

half jewel Jan 1, 2020, 3:19 AM

#

the client shoots, calls fireweapon, and moves burst counter up then asks server to shoot
server's shoot moves burst counter up, since its a repnotify (ignored by owner), server and remote clients fireweapon

fireweapon takes burstcounter to generate a seedstream and does a loop x10 to fire shotgun pellets

#

the result is the same pellets hitting the same spot on everyones screen

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burstcounter is a replicated byte

hoary lark Jan 1, 2020, 3:20 AM

#

Sooo basically he's just passing the seed except he reduces it to 256 possible values? I've thought of doing that too I guess

half jewel Jan 1, 2020, 3:20 AM

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256 different patterns for shotgun blasts sounds good to me

#

or make it an int32 who cares a few extra bytes

#

you generate a seed based on how many times the weapon has shot in its lifetime

#

thats the "burstcounter" mechanic used in shootergame

#

you dont pass anything, you just simply tell the server i shot, you urself up burstcounter by one, and since server will up burstcounter too it is naturally replicated. in the repnotify everyone knows to take that integer to generate their own seed, which is the same everytime cause of how seedstream works to do the randomization of the shotgun pellets

hoary lark Jan 1, 2020, 3:24 AM

#

Yeah that's great until you use it in the real world

meager spade Jan 1, 2020, 3:24 AM

#

honestly a seed just needs to be created and synched per shot, in fortnite they don't even seed the shots

half jewel Jan 1, 2020, 3:25 AM

#

sync it with burstcounter ?

meager spade Jan 1, 2020, 3:25 AM

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no, passed in with the rpc

half jewel Jan 1, 2020, 3:25 AM

#

but burstcounter is a replicated value

meager spade Jan 1, 2020, 3:25 AM

#

you are still sending a rpc

hoary lark Jan 1, 2020, 3:25 AM

#

Same difference then if it's replicated

meager spade Jan 1, 2020, 3:25 AM

#

to the server, might aswell send it with the actual shot

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where it can be used at the correct time

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properties don't replicate the same time

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also he said server shoots in shooter game

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that is wrong

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Shootergame is client side shot

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validated on the server

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server doesn't do any traces

distant wave Jan 1, 2020, 3:32 AM

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@half jewel Link is no longer valid

hoary lark Jan 1, 2020, 3:33 AM

#

you probably wouldn't want the solution in that project anyway for a serious project if it was what I think it was. it might have been reliable over LAN games

#

in my solution I generate a seed with the StartShoot event and pass it to the server, that seed makes a RandomStream that will be used for the shoot event (e.g. a 3-round burst) - that stream is then (locally only) used to generate a new random seed and random stream for each bullet that the gun fires. if everything is equal on client and server, this allows for muzzle spread and projectile damage, bounce, and penetration effects to be randomized identically. if something varies, e.g. a bullet hits something on the server but not on the client, the "desync" will not propogate to the next bullet

winter zenith Jan 1, 2020, 5:16 AM

#

Networking/GameMode question. When a player connects I want to reach out to an external service for some authorization/data-fetching concerns. Ideally I was thinking about implementing this in GameMode's PreLogin/Login but that doesn't look like a good place to perform an async call (or a sync call and block the execution). I was wondering if there's a obvious good place to do this sort of work? Thanks!

mellow cipher Jan 1, 2020, 5:56 AM

#

@chrome bay Update on that steam lobby ping thing, it wasn't working for me because it takes the game like 5-10 seconds to initialize the ping stuff. Hosting/searching before then breaks it

median marten Jan 1, 2020, 6:39 AM

#

Yo. If my component does not have any replicated variables but have server and multicast functions, do I have to set setreplicates to true?

winter zenith Jan 1, 2020, 7:21 AM

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@median marten yes, you need replication enabled on that actor in order to use RPCs

vivid seal Jan 1, 2020, 8:40 AM

#

Is there some documentation somewhere that talks about how TArrays are replicated? Does changing one value cause the server to send the whole array? Does setting an element of something (an object or struct) container in an array cause any replication? RepNotify?
Working out how to manage replication of Buffs and Debuffs on actors but scare of using just RPCs because of the potential for non-relevant actors to see incorrect buffs after becoming relevant.

bitter oriole Jan 1, 2020, 8:41 AM

#

Not the whole array is replicated.

#

Changing a value inside the array will trigger a replication

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Changing a value on a UObject (actor, component...) stored through a pointer in the array will not, the object itself should replicate instead

vivid seal Jan 1, 2020, 8:42 AM

#

Yeah that one didn’t make sense now that I’m rereading my question lol

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So basically I should be good to go as long as what I need to trigger RepNotifies is adding or removing from the array?

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Last question, I know you can get a variables old value by setting a parameter in OnRep of a reference to the variable type, is there a way I can do something similar with a RepNotify from an array that will give me what was added or removed? I’m assuming I can get the entire array and compare to current array to see which element changed but that seems kinda clumsy.

bitter oriole Jan 1, 2020, 8:47 AM

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Oh, I didn't know about that.

#

I'm guessing it should work the same with the array and will indeed giver you the whole thing

vivid seal Jan 1, 2020, 8:48 AM

#

Someone on this discord mentioned it and I’ve found a grand total of two other mentions of it on google, but supposedly yeah

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https://forums.unrealengine.com/development-discussion/c-gameplay-programming/53385-replicatedusing-with-arguments-shootergame-epicstaff-help

Unreal Engine Forums

For gameplay programmers writing C++ code.

bitter oriole Jan 1, 2020, 8:50 AM

#

What I'd do in this case - if you have an array of buffs to replicate and show on the screen with a text notification and/or animation - would be to have two arrays : the replicated one that the game code changes and use, and a display one that stores a structure with the buff itself and the display details

#

So you'd compare both on tick and add, remove or update the display array

vivid seal Jan 1, 2020, 8:53 AM

#

Currently all the display details I would need are contained within the buff actors themselves (icon, name, description, duration) and the UI receives a dispatcher when I add or remove a buff, and then it reshuffles the displayed buffs to accommodate. I just need to make sure that delegate (which I was calling from OnRep on the clients) is being called correctly.

distant wave Jan 1, 2020, 2:14 PM

#

@hoary lark You generate the seed event and pass it to the server. How do you pass it to the server? With a server RPC?

half jewel Jan 1, 2020, 2:42 PM

#

u wil all be delt with. i wil become they and all snilvering snuckatashers will be showb their demise.

hoary lark Jan 1, 2020, 3:47 PM

#

@distant wave yeah, with the same rpc that starts the shoot event

distant wave Jan 1, 2020, 3:58 PM

#

Ok

#

Thanks

robust wind Jan 1, 2020, 7:14 PM

#

Hey everyone, I got a big problem after packaging the game it returns an error at startup.

It says something like:
LowLevelError (line 1429)
Async loading of event graph, cicle in involved.
Anyone knows what that could be?

faint lintel Jan 1, 2020, 8:00 PM

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Can someone please tell me when overlapping with a box collision component in multiplayer (works in single player), why is it possible to get an overlapping actor player controller in blueprints but not in c++.

In C++ I tried to bind overlap methods to delegates two different ways

InteractionArea->OnComponentBeginOverlap.AddDynamic(this, &AInteractiveActorBase::BeginOverlap);


TScriptDelegate<FWeakObjectPtr> OnComponentBeginOverlap;
OnComponentBeginOverlap.BindUFunction(this, "BeginOverlap");
InteractionArea->OnComponentBeginOverlap.Add(OnComponentBeginOverlap);

Could this have something to do with how overlap methods are bound to delegates (ComponentBeginOverlap, OnComponentEndOverlap)?
Overlap methods use UFUNCTION macro.

Code and Blueprint done as in picture.

#

📎 unknown.png

meager spade Jan 2, 2020, 12:35 AM

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cause playercontrollers only exist for the owning player and server

#

so if that was ran on a another client it would be nullptr, but i don't see that happening here

#

i think its not using your player controller class

#

so the cast fails

south flare Jan 2, 2020, 1:29 AM

#

anyone know if there is a fix for this? https://forums.unrealengine.com/development-discussion/c-gameplay-programming/125708-what-does-actorchannelfailure-mean

Unreal Engine Forums

For gameplay programmers writing C++ code.

#

I am working with a replicated actor that has been set as a child actor of another replicated actor via the ChildActorComponent, the child actor component is also set to replicate

#

Whenever I launch a client in standalone mode, I get the following error on the server Server connection received: ActorChannelFailure [UChannel] ChIndex: 0, Closing: 0 [UNetConnection] RemoteAddr: 127.0.0.1:64569, Name: IpConnection_0, Driver: GameNetDriver IpNetDriver_0, IsServer: YES, PC: bp_playercontroller_01_C_0, Owner: bp_playercontroller_01_C_0, UniqueId: NULL:DESKTOP-PSBIJ6E-D38C3FD046E99DE0220164B8798344F9

#

When this happens, my child actors are not replicating properly to the clients

#

but it works fine in PIE

tribal plover Jan 2, 2020, 2:43 AM

#

looking for some assistance on updating a percentage bar for a base unit.

south flare Jan 2, 2020, 2:44 AM

#

repnotify?

#

@tribal plover

tribal plover Jan 2, 2020, 2:44 AM

#

trying to use set percentage

#

i have done it before and got it working for players.. now just trying to get it working for base units

#

📎 unknown.png

#

📎 unknown.png

#

📎 unknown.png

#

so it decreases the health correctly. and the variables are replicated just not decreasing the actual percentage bar

fossil spoke Jan 2, 2020, 2:50 AM

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@tribal plover SetPercentage is in a range 0-1

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So just divide the current value by the max value.

tribal plover Jan 2, 2020, 3:22 AM

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it just is not setting it even if i do that.

#

📎 unknown.png

#

📎 unknown.png

#

The bar still shows full however

keen gale Jan 2, 2020, 6:50 AM

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@tribal plover setpercent is from the base blueprint and others derive from it?

tribal plover Jan 2, 2020, 6:51 AM

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yes sir the second picture. I was just debugging to show it was getting changed in code.

#

"In Memory"

keen gale Jan 2, 2020, 6:52 AM

#

could it be that derived classes are not calling parent implementation that updates the percent?

tribal plover Jan 2, 2020, 6:52 AM

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It could be but i tested that I believe

keen gale Jan 2, 2020, 6:53 AM

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I'd check event ticks for derived classes, they should have parent's tick called

steady cape Jan 2, 2020, 8:26 AM

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For some reasons, when I'm trying to set color for my mesh by multicast, this doesn't work. It works without it, but only shows color on owning machine

📎 2020-01-02_1222.png

#

📎 2020-01-02_1223.png

distant wave Jan 2, 2020, 11:17 AM

#

Hey @hoary lark

#

I was thinking about the random seed thing

#

Wouldn't it be best if I set the random value in the Game Mode and on Post Login I cast to the player class and set the player s seed to the random seed generated in the game mode on begin play. This way all players would have the same seed. It wouldn't be possible to desync, right?

pallid stone Jan 2, 2020, 1:15 PM

#

Whats the opposite of startsession that opens the session back up for new people to join?

obtuse forum Jan 2, 2020, 1:16 PM

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update session?

steady cape Jan 2, 2020, 1:18 PM

#

Ok, I got it. The issue is - clients can't get their controllers. And the question - why? Controllers supposed to be accessible by server and owning client. That's weird

#

Very weird

pallid stone Jan 2, 2020, 1:31 PM

#

I'll try that, cheers

random nymph Jan 2, 2020, 1:56 PM

#

So anyone implemented gamelift flexmatch to their project?

steady cape Jan 2, 2020, 3:41 PM

#

Well, I found out that pawn have special var "Player State", which gives ps without pc, but all colors are still available only on server or owning client

#

📎 2020-01-02_1942.png

#

📎 2020-01-02_1944.png

hoary lark Jan 2, 2020, 6:11 PM

#

@distant wave you can set the start of the stream however, whenever you like, and if everything is perfect that is a clever solution. the problem is that all it takes for streams to diverge is one event being missed on client vs server.

if your game is using StartShoot / StopShoot events, what if the client holds down the mouse button for 3.02 seconds and shoots 73 bullets out of his minigun and the server thinks he held it down for 3.01 seconds and shot 72 bullets?
if anything is using unreliable RPCs, what if a packet gets dropped?
if using reliable RPCs, do we REALLY want to rely on it for the entire duration of a game (it's probably safe TBH but... I don't know, feels risky nonetheless. it can just take one bad ruined experience for a player to ruin a whole session, like the CS:GO hitbox issues they had/have had for years)

distant wave Jan 2, 2020, 6:13 PM

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No I wasn t talking about the stream

#

I was talking about the seed which is a static const int32

#

I was wondering how will the streams be synced if the players use different seeds

#

@hoary lark

hoary lark Jan 2, 2020, 6:18 PM

#

the concept is that you need to start a new stream for a given process any time there is a chance that the state of the process could have diverged. every time you start a new stream, you need to use a new seed (or else the randomization pattern will be the same every time). whoever initiates the process must also generate and share the seed for it.

#

if you're building a lockstep game like an RTS, where everything has to be 100% totally repeatable, you can set one seed at the start and ... run with it

#

FPS games usually aren't built like that obviously as it requires everything to be reliable RPCs or TCP, usually causing frequent game hangups, etc

winged badger Jan 2, 2020, 6:20 PM

#

i think HoJo's system has a good bang for buck

#

if it desyncs, it will be limited to a single burst as worst-case scenario

#

if your desyncs, it will last the entire game @distant wave

#

and all your late joiners are desynced by default

hoary lark Jan 2, 2020, 6:21 PM

#

good point too

#

the way I made mine it wouldn't even be desync'd during a burst (worst that could happen would be the example above where a server shoots a different number of bullets than a client if it doesn't receive the stopshoot due to ping or something), but if bandwidth proved to be a bit tight you could redesign it to sync some kind of seed less often somehow I'm sure

winged badger Jan 2, 2020, 6:25 PM

#

it is just 4 bytes extra

#

per RPC

#

not the first place i'd be saving the bandwidth on

#

i did see a guy on this channel, was obsessing about saving few bytes on one replication

hoary lark Jan 2, 2020, 6:26 PM

#

could even pack it down to a short for a measly 65536 unique randomizations innocence

winged badger Jan 2, 2020, 6:27 PM

#

meanwhile, he was replicating FVector TargetLocation on Tick, instead of just replicating pointer to Target once

#

point being miniscule savings are what you do after your game hits alpha

#

before they just get in the way

bold dune Jan 2, 2020, 8:53 PM

#

I need animations to play on a dedicated server, but they don't seem to be. Is there any known way to do this simply? I need an attached object to move with the montage as there are traces associated with its position. The notifies do fire on the server, but it doesn't seem like any actual animation data (skeletal) is being processed.

shut gyro Jan 2, 2020, 9:06 PM

#

Does anyone know if there is a way to create duplicate game sessions in STEAM? One on a lobby beacon, and one for the actual game. I want to have a beacon for a persistent party, Lobby Beacon and host game session.

bold dune Jan 2, 2020, 9:22 PM

#

Holy crap I'm at a loss on this one.

hoary lark Jan 2, 2020, 9:52 PM

#

never done this myself but first google result for "unreal dedicated server animations" suggests to ensure this Optimization variable is set @bold dune https://i.gyazo.com/f78889038c83f95990fef62c6b62fd5c.png

pseudo iris Jan 2, 2020, 10:06 PM

#

I wanna do some Battle Royale type stuff, like tracking number of players left/determining the winner and setting the safe zone

#

where would I do this? in a game mode, level blueprint etc?

peak star Jan 2, 2020, 10:42 PM

#

@pseudo iris those all sound like things that only the server should be able to change, so it should probably live in the game mode yes, since Game Mode only exists on server. However you also probably want all clients to be able to read that info for their HUD so you also need to update the Gamestate which replicates to all clients.
Level blueprint makes less sense because levels thenselves dont replicate afaik, only the actors in them and specially designated functions do.

pseudo iris Jan 2, 2020, 10:43 PM

#

is there documentation or tutorial you'd recommend to look into this

peak star Jan 2, 2020, 10:43 PM

#

Plus you might want to use the same levle for different game types than battle royale

#

Hmm have you read the Unreal documentation online for what they call the Gameplay Framework?

pseudo iris Jan 2, 2020, 10:43 PM

#

it's more of a last-man standing deathmatch

#

with a small zone that opens when like two people are left

peak star Jan 2, 2020, 10:44 PM

#

That tells you what each part is meant to don(gamemode, gamestate, gameinstance, etc)

#

The way I would set it up is to put all the rules in The game mode, have the game state be the thing that triggers and replicates level-wide information and events to clients, and then for things that happen on each specific level, have the level blueprint register event dispatchers fromthe gamestate and have the gamestate trigger those events since it receives the updates of when there are only two players left.

Thats very similar to how I implemented a sudden death mechanism where certain maps remove most of the cover when there is one minute remaining so the last minute of the game forces a frenzy of battle instead of more hide and seek.

pseudo iris Jan 2, 2020, 10:47 PM

#

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

Gameplay Framework

Core systems, such as game rules, player input and controls, cameras, and user interfaces.

#

is this it?

#

📎 unknown.png

#

I've got this for the safe zone so far

peak star Jan 2, 2020, 10:48 PM

#

Yes. Espexially read the sections titled Game Flow Overview and Game Mode and Game State

pseudo iris Jan 2, 2020, 10:48 PM

#

in its blueprint

peak star Jan 2, 2020, 10:50 PM

#

That should work fine - but make sure Is Safe variable is replicated so that when the server changes it, it will sync to all the clients for that same pawn on each client machine

pseudo iris Jan 2, 2020, 10:50 PM

#

how do I check that?

#

do I want every object that interacts with the player to "replicate"

peak star Jan 2, 2020, 10:50 PM

#

Just click the variable and in the details panel on The side of the blueprint editor window tick the "is replicated" checkbox

#

Not necessarily

pseudo iris Jan 2, 2020, 10:51 PM

#

just the variable?

peak star Jan 2, 2020, 10:52 PM

#

Yeah just the variable. Replicate on a variable means that whenever the server changes it that variable on that actor, then it will update that variable on the same actor on all the client machines too, if they are in range for it to consider it a relevant update

pseudo iris Jan 2, 2020, 10:52 PM

#

when I do this, both the server and the clients activate

peak star Jan 2, 2020, 10:52 PM

#

Which actor does the blueprint belong to?

pseudo iris Jan 2, 2020, 10:53 PM

#

when one of the FPS characters goes into the box it activates for both the client

peak star Jan 2, 2020, 10:53 PM

#

Okay but which actor is the variable inside of?

#

Is it in a pawn or the level blueprint or something else?

pseudo iris Jan 2, 2020, 10:54 PM

#

in the pawn

#

to tell if the player is safe

#

and if not, gets destroyed

peak star Jan 2, 2020, 10:54 PM

#

Okay. I see

#

So anyone outside the safe area gets destroyed at that point

pseudo iris Jan 2, 2020, 10:55 PM

#

That's the plan

peak star Jan 2, 2020, 10:56 PM

#

Good. So if we have two players, Anna amd Brea, and the server machine sets it's copy of Anna to have Is Safe = true, then if Is Safe is replicating, then it should also tell all the Clients' machines that are running the game, to update their copy of Anna to set Is Safe = true also

#

Meanwhile Brea is set to Is Safe= false on the server because she left the safe zone

#

So every client's copy of Brea should also set Is Safe to false

#

So then for all machines, each machine's Anna is safe and each machine's Brea is not safe

#

(Each machine has only those two pawns in this example)

#

But even if some clients are not up to date, then the clients should not be the ones to destroy any pawns. It should only be the server who gets to do that

#

So maybe you dont really need to replixate isSafe

pseudo iris Jan 2, 2020, 11:00 PM

#

right, and that'd be handled by the server, right?

peak star Jan 2, 2020, 11:00 PM

#

The server is the only machine who needs to know

pseudo iris Jan 2, 2020, 11:00 PM

#

*game mode

peak star Jan 2, 2020, 11:01 PM

#

Yes. You can technically do that functionality from anything thatnia running on the server but the Game Mode is probably the most "correct" place to instigate level-wide gameplay events which rely only on the game rules, since the game mode lives on the server and doesnt exist anywhere else.

#

I did most of my logic in GameState but now that I want to add more possible gameplay modes I find my gamestate class is getting really big and scattered and hard to maintain because it has all these branches going everywhere depending on whether they are doing a free for all or team game or other way of playing.

#

So game mode is for the server to make decisions about starting, scoring, and ending games, gamestate is for communicating that stuff to all the participants.

#

Gameinstance is for keeping track of settings and other stuff on each individual machine (it cannot communicate with the network). Gameinstance is not an actor so it is not destroyed when a level is unloaded.

#

So gamemode is server only
Gamestate is for everyone
And gameinstance is private to each machine

#

Game mode can boss the gamestate around though so that is probably the right way to do things

pseudo iris Jan 2, 2020, 11:07 PM

#

i see

peak star Jan 2, 2020, 11:08 PM

#

Now that i understand what youre trying to do a little better...

#

Then I think you dont habe to go through the gamemode and its rules to cause this effect

#

Because the safety zone effect is not about which game mode youre playing but which level youre playing on

pseudo iris Jan 2, 2020, 11:10 PM

#

would I wanna put like, a time limit counter variable in game mode

peak star Jan 2, 2020, 11:10 PM

#

What youre doing should work fine on the level blueprint

#

Yeah time limit should live on the game mode or the game state.

pseudo iris Jan 2, 2020, 11:11 PM

#

right

#

bc what I wanted to do was have multiple zone areas

#

and activate a random one

peak star Jan 2, 2020, 11:13 PM

#

So when it comes time to activate a safe zone, you will need the gamestate to trigger a reliable multicast event. Then this event runs on the gamestates of all the other machines on the network pf the game, and you can pass a parameter to them to tell them which safe zone is activated. Then the server and the clients will all acticate the same safe zone.

pseudo iris Jan 2, 2020, 11:15 PM

#

ngl i'm kinda confused

#

not your fault, you're doing a great job

peak star Jan 2, 2020, 11:15 PM

#

When everybody outsidd the safe zone gets killed, it is because the server checks who the server has marked safe in the server's level blueprint. So when you run that logic you must either do it from the game mode or pass it through an Authority switch or isServer branch first to prevent clients from killing things that only the server should decide to kill

#

That way client machines only kill pawns that the server told them are dead (Because pawns replicate)

#

This is only important because a client might be lagged and think its copynof the same pawn is outside the sage zone and kill it, onlynto find out a 10th of a second later that the server says that pawn made it inside the safe zone just in time and should not be dead after all

#

Network multiplayer makes everything 10 times more complicated. Splitscreen multiplayer only 3 times more complicated :)

#

Because on splitscreen you have multiple players but only one machine and only one copy of each actor and level to think about

#

But in network multiplayer you have to think about each copy of each actor on each machine.

pseudo iris Jan 2, 2020, 11:20 PM

#

that makes sense

#

seems like if you're making a game with online you basically have to do all of blueprints from the ground up to be replicated

peak star Jan 2, 2020, 11:20 PM

#

You dont have to network every actor but you habe to think about how it fits in with everything and when you should enforce the server's version of reality on everyone else

#

Yes thats right

#

If you try to retrofit it, it is about the same effort as building it again from the ground up

#

Unless you have way more stuff that doesnt need to be networked than that does need it

#

Like visual effects and menu widgets etc

#

Those tend not to care whats going on except in the local computer

pseudo iris Jan 2, 2020, 11:22 PM

#

if it was single player would it still work?

peak star Jan 2, 2020, 11:22 PM

#

Yeah thats the nice thing

pseudo iris Jan 2, 2020, 11:23 PM

#

right

peak star Jan 2, 2020, 11:23 PM

#

If you blueprint something for multiplayer, then run it as single player, then everything behaves as the one single cpmputer being the server

#

So if it works on the server in multiplayer, it will work in single player

#

"Listen server" means the comouter is both the server and a client

#

Dedicated server is a little different since it doesnt participate as a player itself. Therefore doesnt need graphics or sounds to be played on its end

#

It just runs the game mode and the level and waits for players to connect as it is running its stuff.

#

But it doesn't join as a player. It is safe to guess you are using a listen server approach

pseudo iris Jan 2, 2020, 11:26 PM

#

i'm, uh, not sure what i'm ujsing honestly

peak star Jan 2, 2020, 11:26 PM

#

So single player is the same as listen server

pseudo iris Jan 2, 2020, 11:26 PM

#

i think I might restart the project and do it while looking at that framework page

peak star Jan 2, 2020, 11:26 PM

#

Ok

pseudo iris Jan 2, 2020, 11:27 PM

#

I really appreciate your help though 🙂

peak star Jan 2, 2020, 11:27 PM

#

Really you can do almost everything that should affect all players globally, from the Gamestate

#

and yes if something should happen to the level you can do it in the level blueprint.

#

For my sudden death timer making the walls disappear, my server gamestate calls reliable multicast to all the clients' gamestates. From there they call an event dispatcher I created named SuddenDeath

#

In the Beginplay of level blueprints that have a sudden death mechanism, they grab the GameState and register that event dispatcher to a custom event in the same level blueprint

#

That event is what makes the walls disappear

#

In that way, everyone's walls begin disappearing at the same time.

#

Additionally I use a timeline to move the walls because timeline nodes replicate so eveb if there is lag, the walls stay in sync and end their disappearing motionat the same time.

#

Your situation is slightly simpler because you arent moving anything over time just turning force fields on/off

#

When your timer goes off you can just loop through every pawn on the server's game mode and if they arent marked Safe then kill them.

#

Very simple!

#

And since it is the game mode you dont have to check anything or replicate anything.

#

When the replixated pawns are killed they will disappear on the clients upon the next network relplication (which happens several times per second but not nearly as fads as your framerate)

#

If you want a special effect to hapoen when they die you can put it in the pawn's Apply Damage event handler (happens only in server) or in their Destruct event (happens on all machines)

pseudo iris Jan 2, 2020, 11:36 PM

#

ahhh

pseudo iris Jan 3, 2020, 12:06 AM

#

so I decided to start from scratch, and start with making the fps character shoot with multicast

#

but its not shooting up or down

#

only directly forward

#

it's also not calling for the client

#

nvm fixed it

distant wave Jan 3, 2020, 12:55 AM

#

Sorry for the late reply @winged badger @hoary lark

#

Last time zlo said: i did see a guy on this channel, was obsessing about saving few bytes on one replication

#

It is important to save as much as possible because you can't spend so much money on ONE dedicated server

#

So it is better to make the game better, not spend more money on servers

worthy perch Jan 3, 2020, 12:57 AM

#

I could be wrong, but I don't think netbandwidth is particularly expensive.

distant wave Jan 3, 2020, 12:58 AM

#

I adds up to the price, and you would also want nice specs if your game requires them

#

And it isn t expensive for one server

#

But you need more

#

Anyways, Zlo or HoJo said that my method for seeds wouldn't be good for late joiners because they could desync. How would they desync if they have the same seed? It doesn't matter when they join. If the seed is set on Begin Play of the game mode, it means that it will stick on the server until a new map is opened. Only then it would change. On Post Login is called for every player joining the game, so I don't see how they desync

#

Maybe I got the concept wrong, but all the players getting the same set of random values (stream) would only work if they have the same seed, otherwise what is the point?

#

Also @hoary lark said: the concept is that you need to start a new stream for a given process any time there is a chance that the state of the process could have diverged. every time you start a new stream, you need to use a new seed (or else the randomization pattern will be the same every time). whoever initiates the process must also generate and share the seed for it.

#

https://tse1.mm.bing.net/th?id=OGC.150ea006021d1dc937e8434d15ab0e34&pid=Api&rurl=https%3A%2F%2Fmedia.giphy.com%2Fmedia%2FSVgKToBLI6S6DUye1Y%2Fgiphy.gif&ehk=Ky%2FeLVeY3mi01k%2FLzLbjN6CW%2BP6iWxIlXPgjKrUpD68%3D

#

What you says only makes sense IF let's say: Player A shoots his shotgun and generates a seed of 12345 for example and then player B shoots his shotgun and also gets the seed 12345. This way they would have the same pattern each and everytime thsy shoot.

#

But if Player A shoots and generates a different seed than player B

#

Then using streams and seeds would make no sense would it?

#

And I got another question

#

If that is the case (where they both generate the same seed) how would I do that? In C++ a static const only changes once and shares its value with all of instances of the class. Would I have to generate the seed if there is authority?

#

This is what I don't understand. How to make them get the same seed. The only method I think would work is with game modes.

#

Anyways, this is how it makes sense to me, if I am mistaken please tell me.

#

Thank you for your time!

hoary lark Jan 3, 2020, 1:21 AM

#

On first quick read my suspicion is that you don't know how random streams work in general (or you're just misapplying your knowledge somehow). I'll be at my pc a bit later

hoary lark Jan 3, 2020, 1:55 AM

#

@distant wave an FRandomStream is an object which generates a sequence of random numbers. You always create a stream using a seed value. The seed value sets the sequence, it is like a DNA, you can clone streams by using the same seed, or use a different seed and get a totally different stream. Creating two FRandomStreams with the same seed means they will generate the exact same sequence of numbers.

all you can do with an FRandomStream is pull out the next number. As long as every player starts the stream at the same time, and all pull out the exact same quantity of numbers for each event in the game, they will all continue to pull out the same numbers.

however if anybody ever pulls out a different quantity of numbers, e.g. if one client misses receipt of any events for any reason, they will no longer be in sync.

winged badger Jan 3, 2020, 2:43 AM

#

and all your late joiners would not be in sync by default, as others would had used the seed to pull next number N times by then, and the late joiner would be pulling its very first

heavy marlin Jan 3, 2020, 4:45 AM

#

hey does anyone here use a simple login system for their game to uniquely identify someone for early testing, before you can use the steam or epic API?

clear cave Jan 3, 2020, 9:54 AM

#

📎 unknown.png

#

Hello everyone

#

I'm trying to implement replicated function, but I'm getting an error that there is missing module

#

I've already included "OnlineSubsystem" module, but it seems like RPC functions need another module

#

can someone help?

hoary lark Jan 3, 2020, 10:01 AM

#

No modules are required to make an rpc function and online subsystems are for including features like steam integration. You're getting something mixed up

clear cave Jan 3, 2020, 10:02 AM

#

📎 unknown.png

#

I'm pretty sure that these errors appear only when u don't have some modules

hoary lark Jan 3, 2020, 10:03 AM

#

They happen when you don't define the methods you need to define too

distant wave Jan 3, 2020, 10:04 AM

#

You forgot to write WithValidation

clear cave Jan 3, 2020, 10:04 AM

#

yeah but I defined it in cpp

hoary lark Jan 3, 2020, 10:04 AM

#

You're making a server rpc, it needs a validate method and the implementation method in your cpp file, do you have a guide to follow?

#

Oh good call from midsoft

distant wave Jan 3, 2020, 10:05 AM

#

It is Server, Reliable, WithValidation

clear cave Jan 3, 2020, 10:05 AM

#

okay

hoary lark Jan 3, 2020, 10:05 AM

#

Though I have some vague memory of someone saying that is no longer required in 424? Maybe a fake memory

clear cave Jan 3, 2020, 10:05 AM

#

lemme try

#

wtf it means?

📎 unknown.png

distant wave Jan 3, 2020, 10:07 AM

#

@hoary lark Well yes, it makes sense, but for that to happen when Player 1 shoots and generates a seed of 12345 for example, all the other players must generate the same seed right?

clear cave Jan 3, 2020, 10:07 AM

#

btw I did as you've suggested

distant wave Jan 3, 2020, 10:09 AM

#

@clear cave sometimes, it happens that when I define the ServerRPC_Validate in C++, I accidentally define it as a void and not as a bool, Idk if that is the case

#

But it is worth checking

clear cave Jan 3, 2020, 10:09 AM

#

I should change return type to bool from void?

#

I mean you suggesting it?

distant wave Jan 3, 2020, 10:09 AM

#

No no

#

I said sometimes i forget it is a bool

#

And i get errors

#

Don t think it is your case

#

Show us your cpp

hoary lark Jan 3, 2020, 10:10 AM

#

@distant wave sorry for "what" to happen are you thinking of?

distant wave Jan 3, 2020, 10:11 AM

#

Sometimes, it happens that instead of
bool AClass::ServerRPC_Validate()

#

I write void AClass...

clear cave Jan 3, 2020, 10:12 AM

#

ah no it's not the case

📎 unknown.png

distant wave Jan 3, 2020, 10:12 AM

#

You didn t write _Implememtation

clear cave Jan 3, 2020, 10:13 AM

#

wut?

distant wave Jan 3, 2020, 10:13 AM

#

ReadyStatius_Implementation

#

void AMainPlayerState::ReadyStatus_Implememtation(bool bIsReady)

clear cave Jan 3, 2020, 10:13 AM

#

okay

#

and declaration?

distant wave Jan 3, 2020, 10:14 AM

#

No the declaration is goos

#

Good

clear cave Jan 3, 2020, 10:14 AM

#

no 😦

distant wave Jan 3, 2020, 10:14 AM

#

What

clear cave Jan 3, 2020, 10:14 AM

#

error

distant wave Jan 3, 2020, 10:15 AM

#

Can you show me the cpp

clear cave Jan 3, 2020, 10:15 AM

#

📎 unknown.png

distant wave Jan 3, 2020, 10:15 AM

#

Also you did keep the WithValidation in the h file right?

hoary lark Jan 3, 2020, 10:15 AM

#

Probably just missing validate too

distant wave Jan 3, 2020, 10:15 AM

#

Yea

clear cave Jan 3, 2020, 10:15 AM

#

📎 unknown.png

distant wave Jan 3, 2020, 10:16 AM

#

In the cpp

clear cave Jan 3, 2020, 10:16 AM

#

ReadyStatus_Implementation_Validate?

distant wave Jan 3, 2020, 10:16 AM

#

{
     return true;
} ```

#

Underneath your implementation

hoary lark Jan 3, 2020, 10:17 AM

#

Argument

clear cave Jan 3, 2020, 10:18 AM

#

okay, I'm not getting u man

#

I should have 2 definitions for 1 declared function?

distant wave Jan 3, 2020, 10:18 AM

#

@hoary lark I replied earlier to your last message: @HoJo Well yes, it makes sense, but for that to happen when Player 1 shoots and generates a seed of 12345 for example, all the other players must generate the same seed right?

clear cave Jan 3, 2020, 10:18 AM

#

like with _Implementaion and _Validate?

distant wave Jan 3, 2020, 10:19 AM

#

@clear cave that is how RPCs in cpp work

#

Yes

hoary lark Jan 3, 2020, 10:19 AM

#

Please go read the docs it's all in that https://docs.unrealengine.com/en-US/Gameplay/Networking/Actors/RPCs/index.html

RPCs

Designating function replication across the network

clear cave Jan 3, 2020, 10:19 AM

#

Okay

distant wave Jan 3, 2020, 10:19 AM

#

For server function the validation thing is kinda like an anticheat

#

If it returns false it disconnnects the client that called it

hoary lark Jan 3, 2020, 10:21 AM

#

Afraid I'm not sure what you're asking though. In my last message I gave an example how two Rand streams can go out of sync... Has nothing to do with generating seeds on different machines...

clear cave Jan 3, 2020, 10:21 AM

#

oh man thank you

#

actually I'm so stupid

#

I was following https://docs.unrealengine.com/en-US/Gameplay/Networking/Actors/RPCs/index.html this guide

RPCs

Designating function replication across the network

distant wave Jan 3, 2020, 10:22 AM

#

I mean that if Player A generates seed 12345, player B must also have seed 12345 this is how they get the same pattern @hoary lark

#

Right

#

?

clear cave Jan 3, 2020, 10:22 AM

#

but I didn't look till the end

#

sorry for bothering you 🙂 ❤️

distant wave Jan 3, 2020, 10:22 AM

#

Np

clear cave Jan 3, 2020, 10:23 AM

#

Actually I could make all this stuff in BP without any problems

#

just I wanted to make it in C++

hoary lark Jan 3, 2020, 10:23 AM

#

Yeah That statement is correct @distant wave

distant wave Jan 3, 2020, 10:23 AM

#

Alright

#

So then how will it happen

#

How will all the players get the seed from the player that shot his shotgun?

hoary lark Jan 3, 2020, 10:24 AM

#

Via an int or short or byte number passed to the server and down to other clients in shoot RPCs

distant wave Jan 3, 2020, 10:25 AM

#

And set their seed to that player s seed

hoary lark Jan 3, 2020, 10:25 AM

#

Everyone creates a random stream object for the shoot event to use for its duration using that seed

distant wave Jan 3, 2020, 10:26 AM

#

Yes

#

Wait

#

Well yes

#

They create a random stream object

#

And when you do that you need to pass in a seed as an argument

#

But they will pass their own seed

#

Idk man a code example would be extremely useful @hoary lark

hoary lark Jan 3, 2020, 10:28 AM

#

they will pass in the seed they were told to use

distant wave Jan 3, 2020, 10:28 AM

#

Yeah, but if they generate their own seeds

#

How would it work

hoary lark Jan 3, 2020, 10:29 AM

#

The person who initiates an event picks the seed to use. It can be randomly generated or an incrementing int, doesn't matter as long as it keeps changing to get different random number streams

steady cape Jan 3, 2020, 10:29 AM

#

Ok, I almost solved my problem (thanks for the help, guys), but there's an issue with the server. If I run game in listen-server mode, from server perspective it works fine, but from client's perspective pawn, that server possessed in, looks not painted, and others looks fine. I don't know, I tried to fix that but it doesn't work

📎 2020-01-03_1424.png

#

P.S: Stop ignoring me!

📎 2020-01-03_1425.png

hoary lark Jan 3, 2020, 10:30 AM

#

So basically the shooting client will pick the seed. They have to do this because they are going to shoot before the server does

distant wave Jan 3, 2020, 10:31 AM

#

If you could give me a code example it would be very useful

#

Brb

hoary lark Jan 3, 2020, 10:32 AM

#

Unfortunately I'm in North America and I have a very busy day tomorrow but tomorrow night might be able to 😄

#

Just to try once more before sleep though: Sequence of events is:

Player shoots. They randomly generate a seed. They use it to create a random stream. They use that stream to create muzzle spread.

They RPC "Shoot with seed 12345" to the server. The server shoots and also generates a random stream with the same seed and uses that stream to create muzzle spread.

The server multicasts "Shoot with seed 12345" and all clients (except the owner) do the same thing, create a random stream with that seed and use it to create muzzle spread with the shooting

distant wave Jan 3, 2020, 10:51 AM

#

Ah ok my fire function looks like this:

void AClass::Fire()
{
     if (Role < ROLE_Authority)
     {
            ServerFire();
     }

     // Fire code: line trace, damage etc.
}

void AClass::ServerFire_Implementation()
{
     Fire();
}

bool AClass::ServerFire_Validate()
{
     return true;
}

#

@hoary lark

#

I guess I generate the seed and stuff in that "//Fire code"

#

Then I make a Server RPC with an int32 parameter and I call it after I generate the seed and the parameter will be the seed I created which is a static const int32 replicated

#

The server rpc calls a multicastrpc with a parameter int32 and will input that seed

#

Am I right @hoary lark

#

Also it should be a replicated static const int32 right?

meager spade Jan 3, 2020, 12:43 PM

#

is this a dedicated server?

#

if so ensure you have animations turned on if your tracing using the player 😄

unique kelp Jan 3, 2020, 3:24 PM

#

I'm late to the party, but I believe the shootergame example does the whole random seed propagation you are talking about @distant wave

#

So it might be a good reference if you run into trouble

meager spade Jan 3, 2020, 3:25 PM

#

so does UT4

unique kelp Jan 3, 2020, 3:36 PM

#

Hasn't that project been dead for a few years already? Has anyone tried to run it on newer engine versions?

#

Seems like it would be a great reference for a lot of things

distant wave Jan 3, 2020, 3:39 PM

#

Alright thanks

obtuse forum Jan 3, 2020, 4:24 PM

#

can a mobile game host a session and a windows game join that session ?

#

I can host on windows and join on mobile, but I can't join on windows when mobile hosts

hoary lark Jan 3, 2020, 4:29 PM

#

@distant wave yeah you pretty much have it except the seed has no need of being static const (well it could be const I guess but it really doesn't matter, it's just a number that gets passed across via RPC and immediately used to create a random stream and that's it)

hoary lark Jan 3, 2020, 4:47 PM

#

And the seed isn't a replicated variable. It's just a local variable

#

That gets passed across the network and used for this "event" in this function only. It has a life time of approximately 80ms (more or less depending on ping lol)

hoary lark Jan 3, 2020, 5:03 PM

#

I'll try to whip up example pseudocode in a few hours

silent phoenix Jan 3, 2020, 5:15 PM

#

Hello everyone,

There is so much conflicting information online about would composition & multiplayer origin rebasing online on a dedicated server. The docs say it is not supported but make no mention of the multiplayer rebase option in project settings. There are conflicting information about if this button will actually allow you to run a PUBG sized map and fix float precision. Has anyone got this working or is it something you need to know c++ to get working?

distant wave Jan 3, 2020, 6:03 PM

#

@hoary lark Thanks a lot for your help!

hoary lark Jan 3, 2020, 6:34 PM

#

@distant wave I haven't doublechecked these much but
https://gist.github.com/HomerJohnston/ddcb21b3a272eb9fa3135e3b0ba9d927 and
https://gist.github.com/HomerJohnston/3c5b3e22e7322844fb8be8a8d9020096

distant wave Jan 3, 2020, 6:35 PM

#

Thanks a lot @hoary lark

#

If you ever need help dm me

hoary lark Jan 3, 2020, 8:06 PM

#

No worries

potent prairie Jan 3, 2020, 8:56 PM

#

is there a way to change the fog/sun light/etc on individual clients? Like if a player enters a building, you can disable the fog just for that one player and not the rest that are connected?

distant wave Jan 3, 2020, 9:02 PM

#

Usually to do stuff just for individual players you need to check if IsLocallyControlled

potent prairie Jan 3, 2020, 9:02 PM

#

nvm i think i got it

#

yeah thats what i just did, looks like it works 🙂

distant wave Jan 3, 2020, 9:03 PM

#

Ah nice

potent prairie Jan 3, 2020, 9:03 PM

#

had to grab the fog actor from the character on beginplay, not sure if thats the best way to do it though

magic helm Jan 3, 2020, 9:04 PM

#

Depends, how many of that character type is gonna be in the level?

potent prairie Jan 3, 2020, 9:07 PM

#

shouldnt be much, game will only have 4 players max

#

begin play will run on every player instance each time a player joins right? So i probably shouldnt do that on begin play

robust rain Jan 3, 2020, 9:13 PM

#

Is there a way to disable rotation replication in the default character setup while keeping the movement replication?

heavy marlin Jan 3, 2020, 11:27 PM

#

override GatherCurrentMovement

#

(in C++)

#

see ActorReplication.cpp line 336

peak star Jan 3, 2020, 11:31 PM

#

@obtuse forum i have hosted on LG ThinQ V30 android smartphone and joined successfully over wifi (no online subsystem) from windows 8.1 PC

obtuse forum Jan 4, 2020, 1:03 AM

#

@peak star thanks, ill try again tomorrow.

polar lotus Jan 4, 2020, 2:04 AM

#

Can anyone help me with this annoying issue

jolly siren Jan 4, 2020, 2:09 AM

#

@polar lotus Just ask you question, instead of asking to ask.

polar lotus Jan 4, 2020, 2:09 AM

#

📎 dce53a0.png

#

Ok

#

My gun will not properly attach to my player

#

for some reason, sometimes only the sphere component attaches

meager spade Jan 4, 2020, 2:28 AM

#

..

twin juniper Jan 4, 2020, 2:28 AM

#

@polar lotus What's the code you used to attach the weapon? and where do you call This function? attaching is as simple as
WEAPONRIGHT->AttachToComponent(GetMesh(), FAttachmentTransformRules::SnapToTargetIncludingScale, "WEAPONRIGHT");

polar lotus Jan 4, 2020, 2:28 AM

#

https://blueprintue.com/blueprint/8lepws8t/

BlueprintUE

Person

#

the event is actually an interface

#

My weapon does thos

#

this

#

📎 unknown.png

#

WeaponOwnerBoundsOverlapped is supposed to represent the weapon that the player is overlapping and can pick up

polar lotus Jan 4, 2020, 2:49 AM

#

and then this is in my player

#

📎 unknown.png

drifting geode Jan 4, 2020, 4:16 AM

#

Hi can anyone please tell me why this fails on client and succeds on server and how to make it not fail on client.
This is an AI BP btw.

📎 unknown.png

ebon nimbus Jan 4, 2020, 4:18 AM

#

show what calls it

#

or where it's called

#

Is the ChoosePlayerStart function the appropriate place to setup match round spawning? I'm getting legitimate data when giving the player a player start, but it doesnt actually work when in multiplayer

drifting geode Jan 4, 2020, 4:21 AM

#

📎 unknown.png

ebon nimbus Jan 4, 2020, 4:22 AM

#

double check to make sure that the event play is being called on the server. If you're unsure, then you could always make an event within that BP, to execute on the server and just call it within your sequence

drifting geode Jan 4, 2020, 4:23 AM

#

Thanks for helping oput Herbie

#

the other parts of the sequence replicate only that cast fails

ebon nimbus Jan 4, 2020, 4:24 AM

#

im guessing thats due to them being components of a replicated actor

#

but thats just a guess i dont have enough context to tell.

drifting geode Jan 4, 2020, 4:26 AM

#

it's part of the dynamic combat system plugin, I'm trying to replicate this and am almost done but can't figure this out

ebon nimbus Jan 4, 2020, 4:27 AM

#

ah, im unfamiliar with that. Im guessing the variable you're setting isnt part of the system?

#

but something you made?

drifting geode Jan 4, 2020, 4:27 AM

#

it is part of the system but It wasn't made with replication in mind I guess

vale ermine Jan 4, 2020, 5:51 AM

#

Any Spatialos pros here?

twin juniper Jan 4, 2020, 6:15 AM

#

@vale ermine They have an office here in Guangzhou, I met a couple of them, but I'm not one 😉

vale ermine Jan 4, 2020, 6:17 AM

#

That is awesome! I have tried thier example project and got everything working. I am just wondering if it is developed enough to use for a release.

twin juniper Jan 4, 2020, 6:17 AM

#

Yes it's being heavily used here in China

#

NetEase / Nostos is the most recent example I can think of

vale ermine Jan 4, 2020, 6:24 AM

#

Spatialos is the only cross server communication solution I have found. I need to host many dedicated servers for different maps and have the players on each map be able to interact with each other if they are on the same map but different servers. That way I can scale the player load better per map.

twin juniper Jan 4, 2020, 6:26 AM

#

I browsed some of their documentation and training videos, seems like a good solution. As far as I know it's being heavily used and extensively developed, but again, this is secondhand information I got from people working in Improbable office here

vale ermine Jan 4, 2020, 6:29 AM

#

Currently, they are on 4.22 release and I need them to update to 4.24. 4.24 got some paper2d improvements I need to scale better using paper2d.

twin juniper Jan 4, 2020, 6:29 AM

#

Yes, their branch is a bit behind Epic main branch, but they should update regularly

vale ermine Jan 4, 2020, 6:30 AM

#

I could make the changes myself. I might just do that.

twin juniper Jan 4, 2020, 6:30 AM

#

A side comment on a tangent, It's unexpected to me to see there is absolutely no indie development here in China. It's only big companies with mobile or multiplayer development, no PC single player and no indie development.

vale ermine Jan 4, 2020, 6:31 AM

#

They know what sells.

dawn nova Jan 4, 2020, 2:57 PM

#

What's the best way to display a player list? Update it constantly on Tick? Is there some kind of OnRep I can bind to instead? My use case is in the pre game lobby I want to display the list of players in the lobby

worthy perch Jan 4, 2020, 3:00 PM

#

Maybe just PlayerState's BeginPlay

faint lintel Jan 4, 2020, 3:05 PM

#

I have a small problem with the following.
I have a lever with 2 animations.
I could use a Statemachine to control the state of the lever, but that seems a bit like an overkill.
My current problem is that not all the players see the lever being pulled.
If I use NetMulticast and host player pulls the lever then all players see it happening but when a client pulls it, the server doesn't see it.

Any suggestions how to solve this replication problem?

grizzled stirrup Jan 4, 2020, 3:09 PM

#

Anyone noticing some strange issues in 4.24.1 where the listen server host / default PIE characters has a very different collision response compared to playing as a client?

#

Other players and enemies act as if they have no collision (to certain channels such as other pawns, various objects and linetraces) but only if playing as the server host, any clients or playing in PIE with the dedicated server tickbox checked works as it did before

grizzled stirrup Jan 4, 2020, 3:41 PM

#

Strangely if I move near the origin it all seems to work fine again

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100K units isn't too far from the origin is it? That's where the collision went all wrong when playing as the server host

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Maybe it was just a strange fluke and I just need to keep all my meshes close to the origin if possible

ebon nimbus Jan 4, 2020, 3:47 PM

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Having an issue with player spawn, specifically players not going to their assigned spawn.

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Player 0, on team 0, getting assigned team0(blue) spawn: https://gyazo.com/70db5cea3d296505d91d60d1735c3d9b

Gyazo

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Player 1, on team 1, getting assigned team1(red) spawn: https://gyazo.com/3e063645d7a3253a3474f451f246b6fb

Gyazo

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character actor being created at that spawn location, then possessed by the player:

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https://gyazo.com/08911ad87664ff290a7e96d823b83c40

Gyazo

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spiderman meme https://gyazo.com/fae2d1e4a1ff19caa81c4deefce54e3c

Gyazo

odd iron Jan 4, 2020, 6:35 PM

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Hey Guys Anyone here in this chat xD

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From my home i have 2 pcs with different steam accounts When im create Server i can see it and join normal ...
When im sending the game to my friends they Cant find my server and i cant see their servers

earnest igloo Jan 4, 2020, 6:40 PM

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What address is your server advertising?

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Its internet address (the one of your router), or its local address?

odd iron Jan 4, 2020, 6:41 PM

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No im using Steam session

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Spacewar and im using lobbies

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on my local address sure

earnest igloo Jan 4, 2020, 6:42 PM

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I'm not all that familiar with Steam sessions. Surely there's still an address involved somewhere

odd iron Jan 4, 2020, 6:42 PM

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Im trying to figure the Issue i've opened Ports tried to Recreate the codes samething

earnest igloo Jan 4, 2020, 6:46 PM

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Hmmm

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How is it that you create your server?

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Do you have to pass an address or port at all?

ebon nimbus Jan 4, 2020, 6:50 PM

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I have this issue with friends that have very restricted internet settings

odd iron Jan 4, 2020, 6:51 PM

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@ebon nimbus In Other Game like human fall flat or Satisfactory i can create session normally

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@earnest igloo Im using Advanced Session

ebon nimbus Jan 4, 2020, 6:52 PM

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Well thats cool, those are fully developed games that have handled connection issues.

odd iron Jan 4, 2020, 6:52 PM

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This is the problem 😛

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my game still in 0.0.0.0.0.0.0.0.0.0.1 Alpha Stage

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but i need to fix this issue to Step on next level

ebon nimbus Jan 4, 2020, 6:53 PM

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Then dont throw anecdotal evidence when people are trying to help. How many people have you tested? Have they all experienced this issue?

odd iron Jan 4, 2020, 6:55 PM

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Sorry i havent got what you mean exactly here " Then dont throw anecdotal evidence when people are trying to help " and my friends are 3 tried to create Session and me tried to create session no one could found

earnest igloo Jan 4, 2020, 6:56 PM

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You're all behind routers I presume?

odd iron Jan 4, 2020, 6:57 PM

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Yes Everyone using Router true

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But different countries

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now i asked them to try to join each other

steady aspen Jan 4, 2020, 6:58 PM

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Are you and your friends using the same download region on steam @odd iron ?

odd iron Jan 4, 2020, 6:58 PM

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No is that Effect ?

steady aspen Jan 4, 2020, 6:58 PM

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If not try that

odd iron Jan 4, 2020, 6:58 PM

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i was thinking about it but i said its for download xD

steady aspen Jan 4, 2020, 6:59 PM

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That was the issue for me and some other guys I've talked to. This is only when using Spacewar ofc

odd iron Jan 4, 2020, 7:00 PM

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And when you Get your Game ID its will change right ?

steady aspen Jan 4, 2020, 7:01 PM

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What?

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oh yeah

odd iron Jan 4, 2020, 7:02 PM

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Ok Cool

steady aspen Jan 4, 2020, 7:02 PM

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I believe so

odd iron Jan 4, 2020, 7:03 PM

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i will check now thanks for info

steady aspen Jan 4, 2020, 7:03 PM

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Np. Hope it works

odd iron Jan 4, 2020, 7:05 PM

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now its showing 1/-1 slots Server without name Xd

steady aspen Jan 4, 2020, 7:06 PM

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Could you send a screenshot of your code ?

odd iron Jan 4, 2020, 7:06 PM

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Sure

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This one for Finding the session

📎 unknown.png

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This one creating session

📎 unknown.png

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This one for joining

📎 unknown.png

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ah when they joining to 1/-1 server its redirect them to mainmenu for somehow

shut gyro Jan 4, 2020, 7:20 PM

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Is there a way to have multiple sessions active at once - a party session for a party system, lobby session for lobby and separate game session?

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Unreal Engine only seems to support "PartySession" and "GameSession"

steady aspen Jan 4, 2020, 7:24 PM

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@odd iron Could you send a picture of the server list?

odd iron Jan 4, 2020, 7:24 PM

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Sure

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you need ingame or code ?

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@steady aspen

steady aspen Jan 4, 2020, 7:25 PM

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ingame

odd iron Jan 4, 2020, 7:25 PM

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ok

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📎 unknown.png

steady aspen Jan 4, 2020, 7:26 PM

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What do you mean with 1/-1 server?

odd iron Jan 4, 2020, 7:27 PM

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I will show you one minute

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@steady aspen Its wont show its empty now

steady aspen Jan 4, 2020, 7:34 PM

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📎 1.PNG

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This works for me

odd iron Jan 4, 2020, 7:35 PM

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Not Advanced one ?

steady aspen Jan 4, 2020, 7:35 PM

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No. Maybe that could be it?

odd iron Jan 4, 2020, 7:35 PM

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Can Found the session from other region the players ?

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i will check it

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@steady aspen Nope

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not working

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This is the Code

📎 unknown.png

steady aspen Jan 4, 2020, 7:50 PM

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Is the host and join server called from the same widget blueprint?

odd iron Jan 4, 2020, 7:51 PM

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Join session in Steam_instance

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i mean in instance i call it Steam_inst

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ah no sorry i have it in Serverlist Child

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📎 unknown.png

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Server = Blueprint Session Result

steady aspen Jan 4, 2020, 7:53 PM

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Try having the join and host session code in the same blueprint like the gameinstance or something

odd iron Jan 4, 2020, 7:54 PM

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The host in game instance

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but the problem in find session its not finding the servers i think join session will not fix it

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since its working in LAN and in Steam with local connection

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i will try to create session normal

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btw do i need to install some API in game content Binaries/win64 because i just have steam_appid.txt and shipping.exe there nothing else

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maybe something missing or

steady aspen Jan 4, 2020, 8:27 PM

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I dont see why it wont work if you have the same download region and the code looks right

odd iron Jan 4, 2020, 8:37 PM

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tomorrow i will try again with my 2nd pc and i will connect it to my phone internet not home wifi

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and i will see if its will find it

drifting geode Jan 4, 2020, 8:50 PM

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can somebody tell me how to replicate AI Controller BPS by any chance? I don't know how to pass this along to Client.

📎 unknown.png

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it returns "none" on client

fossil spoke Jan 4, 2020, 8:51 PM

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You cant, AIControllers only exist on the Server

drifting geode Jan 4, 2020, 8:51 PM

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but how do I pass the info to the client :S

fossil spoke Jan 4, 2020, 8:52 PM

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Through the Pawn it possesses?

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What info do you want on the AIController that the Client needs to know?

drifting geode Jan 4, 2020, 8:52 PM

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stop all movement including montages

fossil spoke Jan 4, 2020, 8:53 PM

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Call that on the Server...

drifting geode Jan 4, 2020, 8:53 PM

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actually not the monages

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📎 unknown.png

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so split it and call rpc after this node?

fossil spoke Jan 4, 2020, 8:54 PM

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Are you using BehaviorTrees?

drifting geode Jan 4, 2020, 8:54 PM

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yep

fossil spoke Jan 4, 2020, 8:55 PM

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Well you should be calling a function that tells your AI to stop moving through the behaviour tree instead

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In which case asking how to stop a Pawn from moving would belong in the #gameplay-ai channel

drifting geode Jan 4, 2020, 8:55 PM

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hm ok

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thanks for your help Matt!

fossil spoke Jan 4, 2020, 8:56 PM

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👍

drifting geode Jan 4, 2020, 8:56 PM

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🥳

fossil spoke Jan 4, 2020, 9:39 PM

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No

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You could combine those variables into a Struct and replicate the Struct instead.

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That might be a workaround for you.

median elbow Jan 4, 2020, 11:28 PM

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I've set up my game so that i can dynamically level stream but i'm having issues with the levels replicating to clients

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in c++, i'm calling AddStreamingLevel on the client (after the server has added the level)

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but i believe my problem is that the server does not get a message from the client that it has loaded the level. so the level is loaded on the client, i can see it and everything, but the server does not replicate any actors in that level to the client

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does anybody know what i might be missing?

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i came across this:

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https://issues.unrealengine.com/issue/UE-24280

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but i'm not using the AddLevel method of the UWorld object, i'm using AddStreamingLevel

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is there a message i can have the client send to the server to say it has loaded that level?

north sierra Jan 4, 2020, 11:38 PM

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Hey folks,
quick question, hope sbdy can help.

I am playing around with mp at the moment to test some things.
Well so currently I tested everything locally and all players got replicated, but once i start using steam subsystem to launch an djoin a session it is not working anymore.

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Is there anything I am missing?

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I am also certain that the server I join in with a second machine is the same as the one i created (checked it via server name)

pseudo iris Jan 4, 2020, 11:48 PM

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can anyone help with replicating firing? I posted stuff in blueprint but no one's respondigng

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if anyone has experience with online fps stuff please discord message me

granite jolt Jan 5, 2020, 12:15 AM

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@median elbow You should be keeping a reference to your dynamic level streaming object so you can add it to the list of StreamingLevels on all the clients when you need to.

pseudo iris Jan 5, 2020, 1:30 AM

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does anyone know how to make an online character get hurt by a line trace?

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like it's not affecting the player at all, but it will affect other actors

median elbow Jan 5, 2020, 1:41 AM

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thanks @granite jolt

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i'm actually doing that

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the level loads fine and i can see it on the client

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its just that no actors in the room replicates

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and i get these warning, like FNetGUIDCache::SupportsObject and something about addinstancedcomponent and stuff

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the entry level stream works, where the player starts, and everything replicates fine there

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its just a problem when i jump through a portal to another level stream (level is streamed and loaded before going through the portal), then nothing replicates

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i think it might have to do with relevancy

dawn nova Jan 5, 2020, 3:13 AM

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Is Presence required for starting listen servers through Steam?

pseudo iris Jan 5, 2020, 3:20 AM

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can anyone help me with replicating line traces?

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I'm getting two lines

pseudo iris Jan 5, 2020, 3:57 AM

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anyone?

pseudo iris Jan 5, 2020, 4:23 AM

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i'm gonna move on from this because I have a basic line trace that works. i'll come back later

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how do i make it so when a player dies they become a spectator?

foggy idol Jan 5, 2020, 4:40 AM

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Is it possible to set control rotation on the client side through blueprints

drifting geode Jan 5, 2020, 4:40 AM

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Hi can anyone tell me why the first client always breaks in PIE???
not only is the camera offse but I also can't control the character

📎 unknown.png

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this is BP replication btw

foggy idol Jan 5, 2020, 4:40 AM

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@pseudo iris I just use a set view target with blend node

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And @pseudo iris I can help with the line traces

pseudo iris Jan 5, 2020, 4:41 AM

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I've been trying to make it so I have a separate child actor fires line traces

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so I can have multiple weapons easier

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but idk how to make it replicate right

foggy idol Jan 5, 2020, 4:42 AM

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Yeah

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That's the same as my setup

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Lemme just load up unreal so I can send screenshots

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📎 unknown.png

pseudo iris Jan 5, 2020, 4:48 AM

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that's similar to what I have

foggy idol Jan 5, 2020, 4:48 AM

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ok so i use a custom event replicated to owning client because the weapon is owned by the player

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and i plug in the values start , end and actors to ignore

pseudo iris Jan 5, 2020, 4:48 AM

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what actors do you plug into the start?

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can I see what you have on the player end please?

foggy idol Jan 5, 2020, 4:49 AM

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📎 unknown.png

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thast still in the weapon BP

pseudo iris Jan 5, 2020, 4:49 AM

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📎 unknown.png

foggy idol Jan 5, 2020, 4:50 AM

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and the trace start and end is just a pure function that i use to save time

pseudo iris Jan 5, 2020, 4:50 AM

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i have it firing but I cant get it to rotate

foggy idol Jan 5, 2020, 4:51 AM

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do you use an interface between the weapon and the player ?

pseudo iris Jan 5, 2020, 4:51 AM

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no

foggy idol Jan 5, 2020, 4:51 AM

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i do

pseudo iris Jan 5, 2020, 4:51 AM

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📎 unknown.png

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this is my code

foggy idol Jan 5, 2020, 4:51 AM

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after failing multiple times i looked through some shooter examples and found that an interface is almost always necessary

pseudo iris Jan 5, 2020, 4:52 AM

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what did you do for the interface?

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this is what i looks like on the child gun that the player actually uses

📎 unknown.png

foggy idol Jan 5, 2020, 4:53 AM

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i made an interface that has the functions. Fire and reload

📎 unknown.png

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in my setup the i dont touch the child blueprints unless i want to make a custom weapon or add stuff

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in my interface fire has only one variable which is a bool to tell the weapon weather if to start firing or not

pseudo iris Jan 5, 2020, 4:55 AM

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the gun parent's eventgraph looks like this

📎 unknown.png

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could I see how you did it please?

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I was following a tutorial but it wasn't for online MP

foggy idol Jan 5, 2020, 4:56 AM

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those are the functions i use in the player to tell the weapon to start firing and to stop

📎 unknown.png

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the target pin is for the weapon

pseudo iris Jan 5, 2020, 4:57 AM

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so how could I modify my code to work like this

foggy idol Jan 5, 2020, 4:57 AM

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that's how i call it

📎 unknown.png

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well first you would have to make an interface

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between your main weapon BP and the character

pseudo iris Jan 5, 2020, 4:58 AM

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📎 unknown.png

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got this in the interface

foggy idol Jan 5, 2020, 4:58 AM

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ok

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now set up 2 custom events

pseudo iris Jan 5, 2020, 4:59 AM

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in the interface?

foggy idol Jan 5, 2020, 4:59 AM

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both run on server

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no

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in the character BP

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one to the weapon to start firing and one to tell it to stop

pseudo iris Jan 5, 2020, 4:59 AM

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done

foggy idol Jan 5, 2020, 5:00 AM

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now add a variable to those custom events

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the variable type is your weapon master BP

pseudo iris Jan 5, 2020, 5:00 AM

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what is that

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the gun parent or the bp interface

foggy idol Jan 5, 2020, 5:00 AM

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the gun parent

pseudo iris Jan 5, 2020, 5:01 AM

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do I want object or class reference

foggy idol Jan 5, 2020, 5:01 AM

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the main Gun blueprint where all the code is

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object

pseudo iris Jan 5, 2020, 5:01 AM

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ahh ok

foggy idol Jan 5, 2020, 5:02 AM

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now set the input up like this in your character bp

📎 unknown.png

cunning shoal Jan 5, 2020, 5:03 AM

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hey guys... question on audio lag with multiplayer. Right now I have an interface that is implemented on my character for doing a line trace to the ground, detecting surface type and playing the correct audio "landing" sound when jumping. This is triggered via the animation blueprint when the landing animation touches the ground. Problem is when i introduce lag the client hears the landing far after it visually happens

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Any idea's on how to play it locally right away, but have other clients hear it when the server gets it?

foggy idol Jan 5, 2020, 5:03 AM

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current weapon is a reference to the weapon your character is currently holding or carrying

pseudo iris Jan 5, 2020, 5:03 AM

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do I wanna call this action?

📎 unknown.png

foggy idol Jan 5, 2020, 5:04 AM

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i call the line trace from within the weapon

pseudo iris Jan 5, 2020, 5:04 AM

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how do you get the camera though

foggy idol Jan 5, 2020, 5:04 AM

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because my character already has lots of code in it

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i set the owner of the weapon to the character

pseudo iris Jan 5, 2020, 5:04 AM

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like so?

📎 unknown.png

foggy idol Jan 5, 2020, 5:05 AM

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so i just use this

📎 unknown.png

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nope

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the input action fire should be connected directly to the is valid nodes

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and the server stop firing and server start firing are the events that should be at the other end of the is valid nodes

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in the screenshot main character bp refers to your player BP

pseudo iris Jan 5, 2020, 5:08 AM

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what's server start fire on your end?

foggy idol Jan 5, 2020, 5:08 AM

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lemme screenshot the whole setup

pseudo iris Jan 5, 2020, 5:08 AM

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thanks

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sorry

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i appreciate this

foggy idol Jan 5, 2020, 5:09 AM

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its ok

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i suffered looking for answers

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just dont want anyone to go through that

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📎 unknown.png

pseudo iris Jan 5, 2020, 5:10 AM

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what about switching authority tho

foggy idol Jan 5, 2020, 5:10 AM

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the event is a run on server event

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so i didnt bother

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tho i might to conserve internet usage