#multiplayer | Unreal Source | Page 384

west rapids Apr 5, 2018, 9:09 PM

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figured be easiest way to MC

severe widget Apr 5, 2018, 9:10 PM

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Yeah, that's understandable.

west rapids Apr 5, 2018, 9:10 PM

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now that i think about its not smart at all lol

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i mean an MC

winged badger Apr 5, 2018, 9:10 PM

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there are only 2 copies of any PC (1 if its a listen server's own)

west rapids Apr 5, 2018, 9:10 PM

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aye

severe widget Apr 5, 2018, 9:10 PM

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So the object that contains the MC function is the same type that the MC will attempt to be called on.

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A cooresponding object on the other machine.

winged badger Apr 5, 2018, 9:10 PM

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Multicast fires a function on every client on that PC, which they don't have

west rapids Apr 5, 2018, 9:10 PM

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aye it loops in on itself

icy nacelle Apr 5, 2018, 9:11 PM

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@winged badger Thanks for the above help, do you mind explaining it a bit further? "OnBeginOverlap (for the trigger volume) -> if OtherActor is a Pawn and a LocallyControlledPawn -> Get the OtherActors HUD and display a widget"

west rapids Apr 5, 2018, 9:11 PM

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this happened cuz i tried doing something archaic...like 2 player 1 keyboard coop

severe widget Apr 5, 2018, 9:11 PM

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So what you really wanna do is have state on the pawn, and replicate that.

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Or state on the uh... PlayerState

winged badger Apr 5, 2018, 9:12 PM

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@icy nacelle when you OnBeginOverlap fires, it will fire on both client and the server

west rapids Apr 5, 2018, 9:12 PM

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you mean have all the input movement logic in PS?

severe widget Apr 5, 2018, 9:12 PM

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No

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I mean the PC can handle input - fine.

west rapids Apr 5, 2018, 9:12 PM

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yeah i meant the functions

severe widget Apr 5, 2018, 9:12 PM

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But the pawn ultimately hosts that state

icy nacelle Apr 5, 2018, 9:12 PM

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Ah

severe widget Apr 5, 2018, 9:12 PM

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eg InputVector

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PS is for other state, but was worth mentioning

winged badger Apr 5, 2018, 9:13 PM

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you cast the OtherActor to Pawn, and pull the IsLocallyControlled from the As Pawn

west rapids Apr 5, 2018, 9:13 PM

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ooooh i get it @severe widget

winged badger Apr 5, 2018, 9:13 PM

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if that is true, the exec is on the client machine where that Pawn is the LocalPlayer

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and only there

icy nacelle Apr 5, 2018, 9:13 PM

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Ahhh, I see where I'm going wrong! In my BPs for my triggers, I'm casting to everyones player controllers

winged badger Apr 5, 2018, 9:14 PM

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so the entire widget displaying gets executed only on client machine when the player is in overlap with the trigger

icy nacelle Apr 5, 2018, 9:14 PM

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This is probably where I am going wrong...

📎 Untitled.png

winged badger Apr 5, 2018, 9:14 PM

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and uses no network bandwidth, which is exactly what you want

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and that gets the PlayerController[0] on every client

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which happens to be their local PC

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and they all display the widget

west rapids Apr 5, 2018, 9:16 PM

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Wouldn't HasAuth and execute on Remote do the same? Does it use bandwidth?

icy nacelle Apr 5, 2018, 9:16 PM

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Yep

winged badger Apr 5, 2018, 9:16 PM

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that would screw either all clients, or only the listen server player

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respectively

icy nacelle Apr 5, 2018, 9:16 PM

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So instead I need to get the actor that just entered?

west rapids Apr 5, 2018, 9:16 PM

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oh right

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Thanks for all the info guys, @winged badger @severe widget , good stuff.

winged badger Apr 5, 2018, 9:17 PM

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yes, cast it to Pawn, check if the Pawn IsLocallyControlled

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and if it is, display the widget

icy nacelle Apr 5, 2018, 9:19 PM

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Cast it to my character pawn? Or pawn?

winged badger Apr 5, 2018, 9:19 PM

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Pawn is good enough

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it contains the IsLocallyControlled function

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which is the only reason to Cast in the first place

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you don't want references to your CharacterPawn if not absolutely needed

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and casting to it would create one

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you can also grab the HUD from Pawn without casting it any further iirc

icy nacelle Apr 5, 2018, 9:24 PM

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Does this look correct?

📎 Untitled.png

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(added Get controller) too

winged badger Apr 5, 2018, 9:28 PM

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no

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same deal as before

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you need to pass the OtherActor from the Overlap event

icy nacelle Apr 5, 2018, 9:28 PM

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Because I'm getting index 0?

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ah

winged badger Apr 5, 2018, 9:29 PM

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Getting PlayerCharacter[0] is GetPlayerController(0)->GetPawn()

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you can add an input of type Actor to your EnterLand

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and connect it when you call it

icy nacelle Apr 5, 2018, 9:31 PM

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Thanks for your help 😃

sharp spire Apr 5, 2018, 9:44 PM

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I have a basic question about multiplayer

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How does the replication toggle work? For example, if I toggle on replication on a socketed skeletal mesh (sheathed item) does it then show for all players in multiplayer ?

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I’m at work so if someone would like to PM me about it that would be great. I could help in other fields

winged badger Apr 5, 2018, 9:49 PM

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all its by default replicated values would replicate

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and you would be able to reference it over the network

sharp spire Apr 5, 2018, 9:50 PM

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I don’t understand the replication process at all

west rapids Apr 5, 2018, 9:50 PM

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read cedric's bible

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really good

sharp spire Apr 5, 2018, 9:50 PM

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Cedric’s ?

west rapids Apr 5, 2018, 9:50 PM

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pinned

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network compendium

winged badger Apr 5, 2018, 9:50 PM

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yep, its pinned to the channel

west rapids Apr 5, 2018, 9:50 PM

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iz awesomesauce

sharp spire Apr 5, 2018, 9:50 PM

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How do I view pinned items? I’m on my iPhone

west rapids Apr 5, 2018, 9:50 PM

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ouch, cant help u there apple guy

winged badger Apr 5, 2018, 9:50 PM

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you hit the pin icon top right

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probably?

sharp spire Apr 5, 2018, 9:51 PM

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I’ve got a decent project put together just thinking about working with multiplayer before I get too far into details

west rapids Apr 5, 2018, 9:51 PM

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😄

winged badger Apr 5, 2018, 9:51 PM

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http://cedric-neukirchen.net/2017/02/14/multiplayer-network-compendium/

Cedric Neukirchen

eXi

Multiplayer Network Compendium

sharp spire Apr 5, 2018, 9:51 PM

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Found it thank you 😃

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I’ll take a look after work

west rapids Apr 5, 2018, 9:51 PM

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just whatever u do, Don't multicast in your Player Controller, learned it the hard way minutes ago.

sharp spire Apr 5, 2018, 9:52 PM

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Oh?

winged badger Apr 5, 2018, 9:52 PM

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or GameMode, thats even slightly worse

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😛

sharp spire Apr 5, 2018, 9:52 PM

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So keep it to pawn classes and actors?

west rapids Apr 5, 2018, 9:52 PM

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well yeah that too 😄 but at least that dont exist anywhere so it wouldnt be that ez to perceive

winged badger Apr 5, 2018, 9:52 PM

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he's joking about his mistake

sharp spire Apr 5, 2018, 9:52 PM

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Oh jeez don’t joke to a multiplayer noob ._.

west rapids Apr 5, 2018, 9:52 PM

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Yeah, remember 2 days ago my PC didn't have an owner?

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and u tried to help me

sharp spire Apr 5, 2018, 9:53 PM

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Ah

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Yes

west rapids Apr 5, 2018, 9:53 PM

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u said the Pawn/None might be

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well there, same thing

winged badger Apr 5, 2018, 9:53 PM

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you'll probably still have some questions after the compendium

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takes a few days for entire unreal networking to settle in one's brain

sharp spire Apr 5, 2018, 9:54 PM

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I’ve been working with unreal engine for less than two years, so I probably will.. but I understand almost every other pipeline lol

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I’ve watched some videos and read some guides but none shed enough light

west rapids Apr 5, 2018, 9:54 PM

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Ive got Niagara and AI left

sharp spire Apr 5, 2018, 9:54 PM

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I understand spawning actors on a server. But vaguely lol

west rapids Apr 5, 2018, 9:54 PM

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but then i know maya and painter too 😛

sharp spire Apr 5, 2018, 9:54 PM

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AI isn’t too bad

west rapids Apr 5, 2018, 9:55 PM

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aye ive watched some

sharp spire Apr 5, 2018, 9:55 PM

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Wait what do you mean by AI?

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Npcs basically right?

west rapids Apr 5, 2018, 9:55 PM

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EQS and the library

sharp spire Apr 5, 2018, 9:55 PM

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Oh haha

west rapids Apr 5, 2018, 9:55 PM

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aye

sharp spire Apr 5, 2018, 9:55 PM

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So are the majority of people in here indie developers?

winged badger Apr 5, 2018, 9:55 PM

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i just read thru a couple of EQS generators...

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first pass tho, i'm sure they will make more sense next time

west rapids Apr 5, 2018, 9:56 PM

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I havent needed AI yet so I haven't bothered with it

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i mean, "smart" AI 😛

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but FML UE4 is huge

sharp spire Apr 5, 2018, 9:57 PM

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I have deer and my last project that I restarted on had AIs that could train and collect items improving their loot

winged badger Apr 5, 2018, 9:57 PM

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i am trying to figure out if AISense_Touch works at all atm

sharp spire Apr 5, 2018, 9:58 PM

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Alright back to work. Ttyl guys.

west rapids Apr 5, 2018, 9:58 PM

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same here.

hidden thorn Apr 5, 2018, 11:02 PM

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Does anyone who used Advanced Sessions/Advanced Steam Sessions know how to access them via c++

winged badger Apr 5, 2018, 11:05 PM

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same way you do with blueprints pretty much

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those are just BlueprintCallable UFUNCTIONs

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as for the CreateAdvancedSession()

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that is a static function returning an instance of its containing class

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UCreateSessionCallbackProxyAdvanced* session = UCreateSessionCallbackProxyAdvanced::CreateAdvancedSession(params);
session->OnSuccess.AddDynamic(this, MyClass::HandleSessionCreated);
session->OnFailure.AddDynamic(this, MyClass::HandleSessionCreationFailed);
session->Activate();

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should be the gist of it

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behaves pretty much the same as UBlueprintAsyncAction derived classes

hidden thorn Apr 5, 2018, 11:18 PM

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What I mean is I have the plugins folder in here and I can access the files: https://i.imgur.com/FP3NBo6.png

Imgur

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But I am not sure how to access the static Methods inside

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I included the h file but nothing comes up

winged badger Apr 5, 2018, 11:20 PM

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UAdvancedSteamFriendsLibrary::FunctionName

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is how you access the static method in that class

hidden thorn Apr 5, 2018, 11:21 PM

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Ok

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Thanks

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Makes sense now

hidden thorn Apr 5, 2018, 11:39 PM

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Is there a reason why GetUniqueNetID is missing from AdvancedSessionLibrary in the c++ files?

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https://i.imgur.com/g4IaCBA.png

Imgur

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or actually is there but it is different

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UFUNCTION(BlueprintPure, Category = "Online|AdvancedSessions|PlayerInfo|PlayerID")
static void GetUniqueNetID(APlayerController *PlayerController, FBPUniqueNetId &UniqueNetId);

brittle sinew Apr 5, 2018, 11:41 PM

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It looks the same to me...?

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I mean, the name has spaces in BP, but that's automatic

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If you're talking about the return value, that's because any reference parameters are treated as output values in BP (unless you mark them as UPARAM(ref))

severe widget Apr 5, 2018, 11:43 PM

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You can also mark as const &

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But then you can't modify it

hidden thorn Apr 5, 2018, 11:44 PM

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How come it also takes a second parameter?

severe widget Apr 5, 2018, 11:44 PM

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literally just explained it to you

winged badger Apr 5, 2018, 11:44 PM

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its the output, sortof

severe widget Apr 5, 2018, 11:44 PM

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you call it like

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FBPUniqueNetId MyId;
MyLib::GetUniqueNetID(Controller, MyId);```

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where MyLib is the right class name

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cause I'm not gonna dig it up

hidden thorn Apr 5, 2018, 11:45 PM

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I see

severe widget Apr 5, 2018, 11:45 PM

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Or you can just get the id from the controller directly

winged badger Apr 5, 2018, 11:45 PM

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it is on the tooltip of his screenshot 😄

hidden thorn Apr 5, 2018, 11:59 PM

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Am I missing something here: https://i.imgur.com/9iG3il7.png

Imgur

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I looked around on google but I can't find anything about FBPUniqueNetId

winged badger Apr 6, 2018, 12:00 AM

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an include

hidden thorn Apr 6, 2018, 12:01 AM

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is FBPUniqueNetId part of Advanced Sessions/Steam ??

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or the engine

winged badger Apr 6, 2018, 12:02 AM

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you open the AdvancedSessionLibrary.h

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you find the function where its a parameter

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you click on the type and do, for example, Peek Definition

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and then you can read its in the BlueprintDataDefinitions.h

hidden thorn Apr 6, 2018, 12:06 AM

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This is what I am doing but it keeps saying "No such file or directory" -> #include "AdvancedSessions/Classes/BlueprintDataDefinitions.h"

winged badger Apr 6, 2018, 12:08 AM

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its in the same folder

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so you don't need the AdvancedSessions/Classes/ part

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or you need the full path including the Plugins/

hidden thorn Apr 6, 2018, 12:09 AM

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I am accessing it from a class I created

winged badger Apr 6, 2018, 12:10 AM

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well

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AdvancedSessionsLibrary already includes it

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so if you are including AdvancedSessionsLibrary.h you shoudl be fine already

hidden thorn Apr 6, 2018, 12:11 AM

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I have an issue with including any of them, can it be that I have to do this?

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https://wiki.unrealengine.com/Plugins,_How_To_Use_CPP_Code_Of_Plugin_In_Your_Project

Plugins, How To Use CPP Code Of Plugin In Your Project

winged badger Apr 6, 2018, 12:12 AM

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you do

hidden thorn Apr 6, 2018, 12:13 AM

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good to know

gloomy tiger Apr 6, 2018, 12:15 AM

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Hey mates,

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I'd like to know your approach to create 'replicated widgets' out and about

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Basically I do have a widget to indicate a player is casting a skill, but I'd like others to see that same widget

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I thought to create an RPC from Server to Multicast, passing the character that is casting a certain skill as an argument. From the Multicast and on, I get all player controllers and make them render the progress bar on the top of that certain character

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Is this a smart approach or am I daydreaming? hehe

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This approach of mine has two issues:

I don't know how to get the controllers of all other players;
I don't necessarily would like to render this widget to everyone. Maybe a certain character is far from where the skill is being casted, then I would like to skip rendering the widget for this specific character.

winged badger Apr 6, 2018, 12:31 AM

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i'd go with widget component

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on the character

hidden thorn Apr 6, 2018, 12:31 AM

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Well if you have the widget on the character but hidden, you could have a bool to display the skill widget using OnRep_Notify

gloomy tiger Apr 6, 2018, 12:32 AM

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Well, I do actually have the widget on the character. But you know, it's a progress bar.

winged badger Apr 6, 2018, 12:32 AM

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that way widget is attached to the character

gloomy tiger Apr 6, 2018, 12:32 AM

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I need to update it for other players as well. 🤔

hidden thorn Apr 6, 2018, 12:33 AM

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Well have a bool turn true when it has to update (progress bar starts increasing locally) and if the player stops set it to false and so the progress bar incrementation stops.

winged badger Apr 6, 2018, 12:34 AM

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you replicate the component

gloomy tiger Apr 6, 2018, 12:35 AM

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But the point is--a Widget doesn't replicate.

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Does it?

winged badger Apr 6, 2018, 12:35 AM

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this is not a UMG widget

gloomy tiger Apr 6, 2018, 12:35 AM

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Wait.

winged badger Apr 6, 2018, 12:36 AM

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this is a part of the character

gloomy tiger Apr 6, 2018, 12:36 AM

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📎 unknown.png

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I created a Widget Blueprint.

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Designed it there. Attached to the character.

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Will this Widget replicate? 🤔

winged badger Apr 6, 2018, 12:36 AM

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so, provided the clients know the activation time

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you just need to let them know the cast started

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and handle the widget locally, each client on its own copy of the character

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so each of them has its own widget mounted on a replicated component

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they don't share it

hidden thorn Apr 6, 2018, 12:38 AM

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@gloomy tiger When you add a widget component on your client, you can replicated that

winged badger Apr 6, 2018, 12:39 AM

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each of them knows how much time/required time has passed because you either notified them or replicated progress

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each of them turns on the widget on their own copy of the casting cahracter

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and display the progress until its done, then remove it

gloomy tiger Apr 6, 2018, 12:40 AM

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Geez.

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It worked.

winged badger Apr 6, 2018, 12:40 AM

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so widget doesn't replicate

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but this still works 😃

gloomy tiger Apr 6, 2018, 12:41 AM

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But I understood. Exactly what you guys said: the progress will run on the copy the clients have about that specific character.

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It makes sense. 😄

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Thank you so much you two! ❤

winged badger Apr 6, 2018, 12:41 AM

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ideally, if they know how long it will take

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you only need to replicate bool/state IsCasting

gloomy tiger Apr 6, 2018, 12:41 AM

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An RPC wouldn't be better?

winged badger Apr 6, 2018, 12:41 AM

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and let clients do their own countdown and progress calc

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RPC works here as well

gloomy tiger Apr 6, 2018, 12:42 AM

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When the skill starts casting -> communicate to everyone, passing the character who started the skill casting.

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(This is what I'm doing and it's working.)

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Am just not sure about performance issues tho

winged badger Apr 6, 2018, 12:42 AM

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you basically want to avoid replicating progress each Tick

gloomy tiger Apr 6, 2018, 12:42 AM

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Oh, nope.

winged badger Apr 6, 2018, 12:42 AM

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good

gloomy tiger Apr 6, 2018, 12:42 AM

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I just pass the Casting Time and the clients handle that.

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If someone 'hacks' the progress bar, doesn't matter, because the skill is still casting on the serevr.

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I have 0 events on every tick running on the server. 😛

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(Maybe movement replication, but the engine is handling this for me and I can't speak on their behalf but -shrug-)

winged badger Apr 6, 2018, 12:44 AM

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those are Unreliable

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RPCs

gloomy tiger Apr 6, 2018, 12:44 AM

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'those' who?

winged badger Apr 6, 2018, 12:44 AM

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ServerMove and the rest of the bunch

gloomy tiger Apr 6, 2018, 12:44 AM

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oh, gotcha

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well, i really have no idea what's happening under the hood regarding movement replication

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but it's working, so it's fine 😛

winged badger Apr 6, 2018, 12:45 AM

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few do, very vague one myself

gloomy tiger Apr 6, 2018, 12:45 AM

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hahaha xD

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well Zlo, thank you again for your help 👍

hidden thorn Apr 6, 2018, 12:45 AM

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@winged badger Is this right?

winged badger Apr 6, 2018, 12:45 AM

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yw

hidden thorn Apr 6, 2018, 12:45 AM

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FText UMainMenu::MM_GetSteamName()
{
    APlayerController* PlayerController = GetWorld()->GetFirstPlayerController();

    FBPUniqueNetId MyID;
    UAdvancedSessionsLibrary::GetUniqueNetID(PlayerController, MyID);

    return FText::FromString(UAdvancedSteamFriendsLibrary::GetSteamPersonaName(MyID));
}

winged badger Apr 6, 2018, 12:46 AM

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you want to get the name from local steam client?

hidden thorn Apr 6, 2018, 12:46 AM

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yea

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I know I can do it via BP, but I want to use the plugin through c++ and I am starting simple

winged badger Apr 6, 2018, 12:48 AM

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i'd go for GameIntance::GetFirstLocalPlayerController()

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but i'm guessing yours will work fine

hidden thorn Apr 6, 2018, 12:49 AM

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it's just cause I am getting this error, and I've been staring at it for like 10-15 min and I just don't understand what is wrong

winged badger Apr 6, 2018, 12:49 AM

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i think when using seamless travel and listen server that the host can end up with Controller[0] not being the local one

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which error?

hidden thorn Apr 6, 2018, 12:50 AM

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True, but it doesn't matter as this is just used locally not on a server

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

Imgur

winged badger Apr 6, 2018, 12:52 AM

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you didn't add the AdvancedSessions as a dependency in your build.cs?

hidden thorn Apr 6, 2018, 12:54 AM

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PublicDependencyModuleNames.AddRange(new string[] { 
    "Core", "CoreUObject", 
    "Engine", "InputCore", 
    "HeadMountedDisplay", 
    "UMG", "OnlineSubsystem", 
    "OnlineSubsystemUtils", 
    "AdvancedSessions", 
    "AdvancedSteamSessions" }
);

PrivateDependencyModuleNames.AddRange(new string[] { "Slate", "SlateCore" });

DynamicallyLoadedModuleNames.Add("OnlineSubsystemSteam");

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Private?

winged badger Apr 6, 2018, 12:56 AM

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no harm in trying

hidden thorn Apr 6, 2018, 12:57 AM

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Ok, but does that error tell you anything?

winged badger Apr 6, 2018, 12:58 AM

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that the linker can't find the function in external module

frank copper Apr 6, 2018, 1:10 AM

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yeah, you need to declare API for you class. like: class YOURMODULE_API blabla

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for the classes that interact with external modules

winged badger Apr 6, 2018, 1:15 AM

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the problematic class is in AdvancedSessions plugin

hidden thorn Apr 6, 2018, 1:21 AM

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Huh, well I've been looking around and nothing seems to work.

winged badger Apr 6, 2018, 1:23 AM

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do you have what Yaki suggested in your class declaration?

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UMainMenu class declaration

hidden thorn Apr 6, 2018, 1:24 AM

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No I do not

winged badger Apr 6, 2018, 1:24 AM

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add it

hidden thorn Apr 6, 2018, 1:25 AM

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I think that is the issue because I do remember reading about it a loooooong time ago

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for some reason 😃

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So like this -> UCLASS() class RPGPROJECT_API UMainMenu : public UUserWidget

winged badger Apr 6, 2018, 1:28 AM

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sounds about right

hidden thorn Apr 6, 2018, 1:29 AM

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Well in that case it didn't helped as it was like that already, all the classes that derive from UUserWidget (at least mine) have _API added

winged badger Apr 6, 2018, 1:30 AM

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ask in .cpp

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aside from rebuilding i don't know what else to suggest

wicked spade Apr 6, 2018, 2:31 AM

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I have a projectile using projectilemovementcomponent, the actor is replicating movement and the projectilemovementcomponent is also replicated as a component. When I fire the projectile on the server it fires straight for the client, but if I change the velocity of the projectile after firing it doesnt update on the client (it still just flies straight). what am I missing?

winged badger Apr 6, 2018, 2:33 AM

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changing the speed of the projectile on the client.

wicked spade Apr 6, 2018, 2:34 AM

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replicate movement isnt enough?

winged badger Apr 6, 2018, 2:34 AM

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for that component, apparently not

wicked spade Apr 6, 2018, 2:34 AM

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hmm okay

winged badger Apr 6, 2018, 2:34 AM

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never worked with it

wicked spade Apr 6, 2018, 2:45 AM

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ah i solved it!

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replicate movement is enough

sharp spire Apr 6, 2018, 2:45 AM

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is it a fairly long process setting up a steam server ?

wicked spade Apr 6, 2018, 2:45 AM

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but the root component also has have component replicated set to true

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because that's what the projectile movement component is acting on

sharp spire Apr 6, 2018, 2:46 AM

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@wicked spade are you good with multiplayer?

wicked spade Apr 6, 2018, 2:46 AM

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depends on the area

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im not so good with setting up servers etc

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im more of a second to second gameplay guy

sharp spire Apr 6, 2018, 2:47 AM

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any light would help, i understand almost all pipelines except mutliplayer, and havent looked into audio

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multiplayer*

winged badger Apr 6, 2018, 2:48 AM

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if you're able to cash out 100 or so euro, check UWorks

sharp spire Apr 6, 2018, 2:48 AM

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so what is the general purpose of the replication toggle? say i had a skeletal mesh socketed to my character as a sheath of a weapon in his hand, would that only show if that is toggled ON? (show to other players)

winged badger Apr 6, 2018, 2:49 AM

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its a huge plugin wrapping pretty much the entire Steam API

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and i think most of the documentation for it is finished now

sharp spire Apr 6, 2018, 2:50 AM

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ill look into it, but id like to try and learn it manually first if possible

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then i wouldnt need to spend any money haha

winged badger Apr 6, 2018, 2:51 AM

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replication "synces" the server actor with its client equivalent

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allows you to reference it over network

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and allows the server to update the client whenever any of the actors/replicated actor components variables change

sharp spire Apr 6, 2018, 2:52 AM

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so in theory, yes?

winged badger Apr 6, 2018, 2:52 AM

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that would be relplicated veriables

sharp spire Apr 6, 2018, 2:53 AM

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or would it require presetup work?

winged badger Apr 6, 2018, 2:53 AM

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you'd have a say, boolean bWeaponOn

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you set it to replicate

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with RepNotify / ReplicatedUsing

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which is a function called after client receives the replicated variable

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and inside of that you could do logic to show/hide the thing

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pretty much replicate actor, replicate the component, set up a state variable that is also replicated

#

and do the RepNofity function for what you described

#

read Cedric's bible 😛

#

most of replication for an actor usually takes only a few minutes once you know what you're doing

sharp spire Apr 6, 2018, 3:00 AM

#

replication for my characters gear/weapons. how would that work? the repnotify would contain the script of switching skeletal meshes? or can that repnotify run another function inside of it

winged badger Apr 6, 2018, 3:01 AM

#

its a function that gets called when "its" variable is replicated

#

each replicated variable can have its own, or they can share

#

but otherwise, its a normal function that has void return and takes no arguments

#

(needs to be a UFUNCTION() )

sharp spire Apr 6, 2018, 3:07 AM

#

so that function would take care of some custom server executed events?

#

https://www.youtube.com/watch?v=5mEmisqfy7w this video is shedding some light

YouTube

pally qle

Unreal Engine 4 Good to Know - Variable Replication

A little experiment to show how variable replication works.

▶ Play video

sharp spire Apr 6, 2018, 4:25 AM

#

is this the general workflow behind replication?

#

https://gyazo.com/21daddb0230155952727645c286edcaf

Gyazo

#

https://gyazo.com/d5f38b672ed51cecc9a670a5a2fd7d7f

Gyazo

#

with equipment set to replicated/or no?

fossil spoke Apr 6, 2018, 4:30 AM

#

You would generally also add in this line so that you are making the changes Locally as well.

📎 Capture.JPG

#

@sharp spire

#

Without having to wait for the replication state to come through from the server

sharp spire Apr 6, 2018, 4:32 AM

#

See, I have a transform bone node in my animation graph that works well when the variables are replicated but when I have that pin connected my mesh goes haywire when I move. Why is that?

#

The locally affected pin

fossil spoke Apr 6, 2018, 4:33 AM

#

Couldnt answer that without seeing the graph

sharp spire Apr 6, 2018, 4:45 AM

#

It’s the same concept i believe. Sorry I’d post a photo but I shut down for the night lol. It’s the same concept, so I’ll try connecting the pin in the image I sent you and see if that helps with local transforms. Also when I have that setup, I enter fly mode and I can longer move. My momentum slows down to a halt and I can no longer move further without leaving fly mode

#

Is fly mode not replicated ?

#

@fossil spoke

fossil spoke Apr 6, 2018, 4:49 AM

#

I cant imagine it wouldnt be, ive never used it. Depends on how your trying to move the Character while in that mode i guess.

#

Difficult to say without seeing any code.

sharp spire Apr 6, 2018, 4:50 AM

#

Basically using its built in settings for fly mode with modified damping to slow down and come to a stop without input. It uses the same input though so I don’t understand why it wouldn’t continue to move

#

I’m trying to convert my project to multiplayer. I have 14,000 errors to go through lol

fossil spoke Apr 6, 2018, 4:51 AM

#

....

sharp spire Apr 6, 2018, 4:51 AM

#

Sounds worst than it is >.>

fossil spoke Apr 6, 2018, 4:51 AM

#

You dont just convert an game to multiplayer....

#

Multiplayer is not an afterthought lol

sharp spire Apr 6, 2018, 4:51 AM

#

I’m a multiplayer noob lol

#

It’s a during process, right?

fossil spoke Apr 6, 2018, 4:51 AM

#

You would be better off rebuilding the game from the ground up with multiplayer in mind

sharp spire Apr 6, 2018, 4:52 AM

#

I’m not at end content creation, I wouldn’t even say halfway. Just finished up it’s design

#

Hmm

fossil spoke Apr 6, 2018, 4:52 AM

#

Seriously, multiplayer should be like the second question you ask yourself before you make an game.

sharp spire Apr 6, 2018, 4:53 AM

#

I knew it was going to be multiplayer but I thought it would be simpler converting lol

#

It’s definitely possibly rewriting functions to be server ran

#

Atleast so far it doesn’t seem crazy to implement

#

What’re the key reasons you should have it in mind from the ground up?

#

I’m also led to believe a lot of my code shouldn’t be in the third person character bp if that’s the case then I can see where you’re coming from

#

Does the player controller hold most of the code so it can transition from map to map?

fossil spoke Apr 6, 2018, 4:58 AM

#

You are going to fight replication issues all the way if you attempt to convert to MP

#

Replication is an difficult subject to wrap your head around.

#

Starting from the ground up ensures that your base is solid

sharp spire Apr 6, 2018, 5:00 AM

#

Do you have a strong understanding? I’m very smart and have an easy time learning everything so far except multiplayer and a couple minor aspects. Maybe you could find a way to explain it or possibly with an example? I don’t understand playerstate, gamestate, and playercontroller and their key roles rather than using a pawn class. (Besides that playercontroller is persistent between maps?)

fossil spoke Apr 6, 2018, 5:01 AM

#

Check the Pinned messages in this channel, there are ALOT of resources that explain Replication, including the official documentation and user guides from Epic.

sharp spire Apr 6, 2018, 5:02 AM

#

I’ve read them and Cedric’s guide too, it still confuses me for some reason. I can’t be the only one who thinks it can be summed up in a nutshell a lot easier

fossil spoke Apr 6, 2018, 5:03 AM

#

GameState is used to commonly share information about the state of the game to all connections.

#

PlayerState functions the same except you would only use it to hold info about players.

sharp spire Apr 6, 2018, 5:03 AM

#

What would the gamestate serve in a normal mmorpg like ARK or survival style open world

#

If you could give an example of what would be stored in both of those in a game like ark

spare glade Apr 6, 2018, 5:05 AM

#

tribe for one i believe

sharp spire Apr 6, 2018, 5:06 AM

#

Gamestate would keep track of tribes? That still seems confusing to grasp

#

Is playerstate the current player? Or rather a structure for all players

fossil spoke Apr 6, 2018, 5:06 AM

#

PlayerState may hold an reference to your Tribe but the GameState would hold all references to all Tribes

spare glade Apr 6, 2018, 5:06 AM

#

oof sorry misreadXD

fossil spoke Apr 6, 2018, 5:07 AM

#

There is an PlayerState for every Player

#

The GameState holds an list of all PlayerStates

sharp spire Apr 6, 2018, 5:07 AM

#

Is the playerstate an actual bp, or keeping track of the controller

fossil spoke Apr 6, 2018, 5:07 AM

#

Yes its an AActor

#

GameState is also an AActor

#

GameMode is an AActor

sharp spire Apr 6, 2018, 5:08 AM

#

Should that contain things such as max health and current health? (Playerstate)

#

Or just max health and current health on controller

fossil spoke Apr 6, 2018, 5:08 AM

#

No health is specific to an Character

sharp spire Apr 6, 2018, 5:08 AM

#

Hm

fossil spoke Apr 6, 2018, 5:08 AM

#

If your dead and in an spectator mode for example you dont have health

#

Sooooo

sharp spire Apr 6, 2018, 5:08 AM

#

So maybe login info and UI settings etc? On player stage

#

State *

fossil spoke Apr 6, 2018, 5:09 AM

#

No

spare glade Apr 6, 2018, 5:09 AM

#

http://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf this would also be good for you to read if you havnt already

sharp spire Apr 6, 2018, 5:09 AM

#

Fp

#

I have heroic

fossil spoke Apr 6, 2018, 5:09 AM

#

PlayerState holds common shared info

#

Probably the Character customisation options would be on PlayerState

sharp spire Apr 6, 2018, 5:10 AM

#

Not player name or game settings( such as gfx)

fossil spoke Apr 6, 2018, 5:10 AM

#

PlayerName is yes

#

Graphics options no

#

Remember

#

Common Shared info

#

Your graphics options dont have any meaning to other players

#

So they dont belong on PlayerState

spare glade Apr 6, 2018, 5:10 AM

#

so in call of duty(lul) what info you get out of the leaderboard is what would be playerstate

sharp spire Apr 6, 2018, 5:11 AM

#

I actually don’t play cod lol

#

Always been an open world mmorpg fan, mainly Runescape

spare glade Apr 6, 2018, 5:14 AM

#

player state is keeping individual stats and info about the player that you would want others to know about, Like what ur username is, what you look like, so all the variables that make up the common knowledge about you from another players perspective. now stuff that doesnt need to be shared shouldnt be put in the player state, like say in a mmo u dont need all ur stats lined up usually for all the others to see (unless you needed that feature)

fossil spoke Apr 6, 2018, 5:15 AM

#

Your Level would be in PlayerState but your Skill Levels wouldnt because they arent relevant for other Players to know.

sharp spire Apr 6, 2018, 5:17 AM

#

Got it so my level may be in playerstate but not the exp? If that makes sense

spare glade Apr 6, 2018, 5:17 AM

#

mhm

sharp spire Apr 6, 2018, 5:18 AM

#

Also I have to goto bed if you don’t mind PM me its 01:17

#

Just so I can possibly ask some questions tomorrow for a better understanding. I appreciate both of your help you guys are amazing

queen bay Apr 6, 2018, 6:26 AM

#

Hi guys, I have a problem with steam and wonder if you can help me.

Pic 1: I created an advanced session and jump into my new map with "listen".
(dont care about "allow invites = false", this will be updated with an "update session" later)

Pic 2: Now I'm going to invite friends and open the steam invite-ui.

Pic 3: Until this point, all is working fine, I can send invites to my friends and they get them via steam.

But when the steam friend is trying to accept the invite, following is happen:

Pic 4. My Steam friend accept the invite and get a message: "There are no available servers for the game Space War". (I dont get the String of Pic 4)

I'm pretty sure, that I'm not be able to invite friends with an unregistered steam app ID.

But I wonder if there is a way to avoid the step, because I have to test many things before registering our app id.

Is there any way to listen to this steam internal callback to get an event in the unreal which catch this Invite-Accept ??

And wherever applicable with blueprinting methods?

Hope you can help me.

Thanks 😃

📎 steaminviteui.png

slate veldt Apr 6, 2018, 9:51 AM

#

Here's a fun one! If I had 2 pawns (1 pawn 1 character) that I wanted to control on a client with a single player controller, is it somewhat simple to configure? For example, I know that clients often have the role ROLE_AutonomousProxy over their pawn, but is it possible to set it up so they have 2 pawns with that role? Currently the second pawn (character) is set to SimulatedProxy which is preventing movement added via AddMovementInput from being executed

#

I notice that the AController class actually has 2 references I could potentially use - Pawn and Character

slate veldt Apr 6, 2018, 10:25 AM

#

Might have come up with a solution - found that the character movement component "ReplicateMoveToServer" function can be overridden, the first check in it checks if it's our AcknowledgedPawn. In this case, the Character (Pawn B) stores a reference to Pawn A, so just changed the check in the overridden version to see if the acknowledged pawn is the one referenced by our character. Fingers crossed

winged badger Apr 6, 2018, 11:11 AM

#

what are you actually trying to accomplish @slate veldt ?

#

attaching your pawn to your character seems like a much simpler solution

slate veldt Apr 6, 2018, 11:43 AM

#

I cannot just attach the pawn to the character because of mechanics that I cannot disclose unfortunately, attaching/parenting them would cause problems.
I've just figured out I can scrap part of the solution I found before and just replace some of it by overridding the Characters "IsLocallyControlled" to instead check for whether the linked Pawn is locally controlled, should fix the locations where it is checked, plus I can use it elsewhere instead of checking the linked pawn's local control status each time

hidden thorn Apr 6, 2018, 12:09 PM

#

One thing to note in case anyone ever has this problem, when testing steam in your project make sure you are not playing any games through steam otherwise it will fail.

winged badger Apr 6, 2018, 12:48 PM

#

you sure managed to slam facefirst into every possible problem in the last day @hidden thorn 😄

hidden thorn Apr 6, 2018, 12:50 PM

#

Well luckily everything works just fine now thanks to everyone's help.

winged badger Apr 6, 2018, 12:50 PM

#

i did not know that about steam, makes sense tho

hidden thorn Apr 6, 2018, 12:54 PM

#

Yep, since you can't open multiple games through steam at the same time. I just wasn't expecting it.

buoyant hollow Apr 6, 2018, 1:23 PM

#

Any reason why most games are 4 player coop and more? Like 8 player coop game

#

why most games are 4 player coop and NOT more*

sharp spire Apr 6, 2018, 1:32 PM

#

Screen size limitations

#

Controller inputs

#

Those are my two guesses @Josh#8722

#

Or do you mean lobby multiplayer ?

#

@spare glade are you still up?

buoyant hollow Apr 6, 2018, 1:34 PM

#

Thanks @sharp spire , definitely lobby multiplayer

sharp spire Apr 6, 2018, 1:35 PM

#

I like my English when I first wake up... haha bare with me

#

I’m not sure why it’s most commonly four player teams lol

#

Sorry if I’m misunderstanding your question

buoyant hollow Apr 6, 2018, 1:37 PM

#

no, that's great, i dont understand why it's commonly 4 players either

#

i guess im wondering if there's performance issues or something? not sure

#

anyway, thanks @sharp spire

sharp spire Apr 6, 2018, 1:59 PM

#

I can’t imagine there are considering siege and some modern games have 8+

#

WoW allows quite a lobby

#

Aswell as various other mmos so it’s definitely possible. Maybe just needs extra optimizing, or they got lazy haha

#

Archeage allows 64 man raids or something aswell

sharp spire Apr 6, 2018, 3:38 PM

#

Is anyone in here that can answer a few more questions of mine about ue4 multiplayer?

#

Cedric’s guide doesn’t really help me for some reason

hidden thorn Apr 6, 2018, 3:50 PM

#

Go for it

gloomy tiger Apr 6, 2018, 4:23 PM

#

Hey guys, question about Update Frequency.

#

By default, it is 100. I'm unsure about how much I should use to the characters controlled by players.

west rapids Apr 6, 2018, 4:26 PM

#

You could always lower it by 10, test, and see if u get problems

#

when u see teleportations then ur too low

#

its primitive but cold/hot game will works

gloomy tiger Apr 6, 2018, 4:29 PM

#

Thank you for the answer @west rapids. Gonna tweak with it.

#

Another question regarding NCDS.

#

Who is the reference for it?

#

The player's character? The player's controller position?

west rapids Apr 6, 2018, 4:30 PM

#

probably character

#

player controllers dont replicate, so I don't see a point in having a cull distance on it

gloomy tiger Apr 6, 2018, 4:33 PM

#

Mhm. That's weird.

#

I have quite a big map here and my characters were always relevant, but that was causing an insane lag.

#

I'm trying to set Always Relevant by default and when the character got spawned, I was setting it to false

#

But with NCDS, when I was getting closer to another character, it was invisible 🤔

west rapids Apr 6, 2018, 4:34 PM

#

have you been tweaking priorities?

#

iirc char priority is 3 by default

#

if u lowered it ull get the lag

gloomy tiger Apr 6, 2018, 4:35 PM

#

Nope. I haven't touched them.

#

It's important to note that my characters aren't possessed by the controller.

#

They're owned by it.

#

Does this mean something relevant?

west rapids Apr 6, 2018, 4:36 PM

#

https://docs.unrealengine.com/en-us/Gameplay/Networking/Actors/Relevancy

#

take a look at this

#

according to it the relevancy goes up the chain if the bool is flipped

#

also how did u manage to own a char ur not posessing?

gloomy tiger Apr 6, 2018, 4:40 PM

#

I'm working on a point-and-click third-person game.

#

My Character is possessed by an AI

#

And owned by the Player Controller

#

I couldn't manage to move it around if not using this approach 🤔

#

Well, @west rapids, I have the impression I'm misusing NCDS.

#

The NCDS for Characters are low. And they're Always Relevant just for spawning purposes.

#

But seems that even having them to be Always Relevant on spawn, they're not actually being spawned.

west rapids Apr 6, 2018, 4:42 PM

#

if its possessed by an AI then its owned by the server

gloomy tiger Apr 6, 2018, 4:43 PM

#

But NCDS shouldn't use the character's position to determine who is relevant and who is not?

west rapids Apr 6, 2018, 4:45 PM

#

AFAIK relevancy comes into play when replicated actors exit the range.

#

so the cull distance is ur relevancy range

gloomy tiger Apr 6, 2018, 4:45 PM

#

Mhm. Not when they enter...

west rapids Apr 6, 2018, 4:45 PM

#

there was a good example

#

with a chest

#

in Epics example maps

#

take a look at it and disect the logic for the chest

#

it shows when the chest is opened outside the relevancy range, how it will be shown as already open when u enter

#

whereas otherwise it would open again with the other case

#

or not be open at all

#

depending on the setup

winged badger Apr 6, 2018, 4:54 PM

#

@gloomy tiger you can override AActor::IsNetRelevantFor

#

if the default implementation doesn't work for you

gloomy tiger Apr 6, 2018, 4:55 PM

#

Just watched the video @west rapids

#

It doesn't give me the network properties 🤔

west rapids Apr 6, 2018, 4:56 PM

#

wow they had a video too 😄

#

no im talkin bout the project itself

#

u can download it for free and open it

gloomy tiger Apr 6, 2018, 4:56 PM

#

@winged badger I don't know whether the default implementation works for me yet lol

#

But will consider it once I'm sure it doesn't work

#

Ok, gonna take a look at it @west rapids, thanks!

west rapids Apr 6, 2018, 4:58 PM

#

https://gyazo.com/5e30786a265d741a281e6e3719f85dc4

Gyazo

#

in the Learn tab of the launcher

#

https://docs.unrealengine.com/en-US/Resources/ContentExamples/Networking/2_2

#

heres the accompanying doc

#

altho Part4 is what u need to look at

gloomy tiger Apr 6, 2018, 5:05 PM

#

By part 4 you mean https://docs.unrealengine.com/en-US/Resources/ContentExamples/Networking/4 ?

west rapids Apr 6, 2018, 5:08 PM

#

gloomy tiger Apr 6, 2018, 5:12 PM

#

+?

west rapids Apr 6, 2018, 5:12 PM

#

+=yes

#

😄

gloomy tiger Apr 6, 2018, 5:13 PM

#

oh, this one was new to me lol

#

i feel so weird

west rapids Apr 6, 2018, 5:13 PM

#

laziest way to write yes

gloomy tiger Apr 6, 2018, 5:13 PM

#

i always see/read people using repnotify

#

my project is quite big and doesn't have even 1

west rapids Apr 6, 2018, 5:15 PM

#

well it depends on what ur doing, open up the content example, good info there

gloomy tiger Apr 6, 2018, 5:15 PM

#

📎 unknown.png

#

almost there

thin stratus Apr 6, 2018, 5:17 PM

#

RepNotify is needed if you want late joiners or people that get relevant to also retrieve the change

#

Otherwise, if you just want to fire and forget, you'd use a Multicast

timid pendant Apr 6, 2018, 5:18 PM

#

Hello I am getting an rpc error here using this RPC code LogNetSerialization: Error: FBitReader::SetOverflowed() called! (ReadLen: 2266, Remaining: 44, Max: 67)
LogNet: Error: ReadFieldHeaderAndPayload: Error reading payload. Object: BasePlayerController 1:PersistentLevel.BasePlayerController_0, OutField: ClientReceiveLocalizedMessage

📎 rpc.PNG

gloomy tiger Apr 6, 2018, 5:28 PM

#

@thin stratus hmm

#

it makes sense

#

well, @west rapids, I've looked into the content examples

#

and it has nothing different from what I'm doing

#

it uses NCDS

#

what I just want is that a character becomes visible when it enters a given area of a player

winged badger Apr 6, 2018, 5:33 PM

#

the easiest way to test it i can think of right now

#

make a boolean in that character, representing its netrelevancy state

#

nvm, not that easy

gloomy tiger Apr 6, 2018, 5:35 PM

#

I thought NCDS would resolve these problems 🤔

winged badger Apr 6, 2018, 5:35 PM

#

unless you call the IsNetRelevantFor(yourPlayer) all the time

#

and if the result differs from the backup variable, print it, or show it

#

so you can basically know the NetRelevant state each time it changes

#

and be sure what's actually going on there

gloomy tiger Apr 6, 2018, 5:37 PM

#

Not achievable through blueprints, right?

winged badger Apr 6, 2018, 5:37 PM

#

default Pawn implementation is pretty much:

#

if its AlwaysRelevant, if its a ViewTarget, or any in combination attached to ViewTarget, its relevant

#

else if its Hidden, OwnerOnly or has no collision its not relevant

#

else if its attached to an actor, uses that actor's relevancy

#

and if none of that

#

then uses distance based relevancy

icy nacelle Apr 6, 2018, 5:42 PM

#

Where am I going wrong here for network replication?
When a player is pickpocketed, this event executes.
It removes the amount from the player who's been robbed, refreshes their inventory UI, and then prints out to the player's UI that they've been robbed.

Both of these functions that are broken do work when called on the owning clients. I feel this error is down to the server telling the client to do something with their UI.

📎 Untitled.png

winged badger Apr 6, 2018, 5:44 PM

#

refresh inventory should be handled thru replication not RPC

#

and GetGameHUD should be called on client exec

frank copper Apr 6, 2018, 5:45 PM

#

plus the target player is not the owning client

winged badger Apr 6, 2018, 5:45 PM

#

if you don't want to get server's own hud

timid pendant Apr 6, 2018, 5:46 PM

#

Guys any idea on the rpc error i posted above

winged badger Apr 6, 2018, 5:46 PM

#

never saw anything like it :S

#

looks like it tried to send more then max buffer size

#

but you shouldn't be able to accidentally break that

#

did you replicate a large array of not too small objects?

icy nacelle Apr 6, 2018, 5:48 PM

#

But I'm using the target player through the event's input though?

winged badger Apr 6, 2018, 5:49 PM

#

yes

#

but you should call the client RPC inside the target player

#

to notify target's UI

#

and get HUD only inside that RPC function

#

so add Replicated, Client function inside the whatever target player's class is

#

and inside it get HUD and show widget

#

and then just drag from TargetPlayer pin and call that function

gloomy tiger Apr 6, 2018, 5:52 PM

#

I noticed something, @winged badger

#

NCDS is working.

wary willow Apr 6, 2018, 5:53 PM

#

@icy nacelle Where is the BP at?

gloomy tiger Apr 6, 2018, 5:53 PM

#

My characters are becoming visible/invisible

icy nacelle Apr 6, 2018, 5:53 PM

#

Thats in the controller

gloomy tiger Apr 6, 2018, 5:53 PM

#

But they go invisible if they don't move

icy nacelle Apr 6, 2018, 5:54 PM

#

So I should just do this instead? call a function on the character?

📎 Untitled.png

winged badger Apr 6, 2018, 5:55 PM

#

BeenPickpocketed should be the client replicated event

#

then you can just call it from ServerPickpocketSuccess directly

timid pendant Apr 6, 2018, 5:56 PM

#

It wasnt replicating an array at all just a simple string

icy nacelle Apr 6, 2018, 5:56 PM

#

Yeah, that's what I've been trying to do

winged badger Apr 6, 2018, 5:56 PM

#

how long?

icy nacelle Apr 6, 2018, 5:57 PM

#

So all I need to do is run this on owning client?

timid pendant Apr 6, 2018, 5:59 PM

#

How long is the FString? It should only be 7 letters

icy nacelle Apr 6, 2018, 6:03 PM

#

Thanks for the help @winged badger. Its all good now 😃 Starting to understand networking a lot more

#

Baby steps.

gloomy tiger Apr 6, 2018, 6:05 PM

#

@winged badger sorry pinging you again.

#

NCDS is making players go invisible, but not visible. The point here is: even when the characters are invisible, the collision exists.

#

🤔

#

Mhmm. after further investigation

#

Noticed something.

winged badger Apr 6, 2018, 6:18 PM

#

any level streaming in the mix?

gloomy tiger Apr 6, 2018, 6:18 PM

#

Nope.

#

I've set a very low NCDS.

#

And I noticed it doesn't move.

#

I mean, I've started the game with 2 player characters.

winged badger Apr 6, 2018, 6:19 PM

#

i just love how they decided to put distance squared there

#

i understand comparing squared vector distances

gloomy tiger Apr 6, 2018, 6:19 PM

#

One very close to the other. When one leaves the spawn point, it becomes invisible. Once it gets back, it becomes visible. (From the other character's perspective.)

winged badger Apr 6, 2018, 6:19 PM

#

but making you input by default a 9 digit number is bound to cause mistakes

gloomy tiger Apr 6, 2018, 6:20 PM

#

Yeah, it's insane 🤦

winged badger Apr 6, 2018, 6:20 PM

#

and squaring 15000 would cost nothing

gloomy tiger Apr 6, 2018, 6:20 PM

#

Well, but that's what I diagnosed. The NCDS doesn't move with the character.

#

It is static and relative to the spawn point.

#

I don't know if this is its behavior by nature or my game is doing something wrong.

#

Do you have an idea?

#

What's also bugging me is that the actor is invisible but the collision still exists. 🤦

#

The WORST thing is this: https://www.google.com.br/search?rlz=1C1CHZL_pt-BRBR692BR692&ei=7brHWtTiCcGzwATTmIaACQ&q=net+cull+distance+squared+documentation&oq=net+cull+distance+squared+documentation&gs_l=psy-ab.3..33i160k1l2.1640.3004.0.3056.14.8.0.0.0.0.237.736.0j3j1.4.0....0...1c.1.64.psy-ab..10.4.735...35i39k1j0i22i30k1.0.rR7wCK1GB-A&gws_rd=cr&dcr=0

#

The first link I got regarding the documentation of NCDS is this post -> https://forums.unrealengine.com/development-discussion/blueprint-visual-scripting/87160-net-cull-distance-squared-how-does-it-work

Net Cull Distance Squared - How does it work? - Unreal En...

Build powerful visual scripts without code.

#

Can't find anything on official docs

#

📎 unknown.png

#

What does mean client's viewpoint?

winged badger Apr 6, 2018, 6:33 PM

#

you aren't hiding them manually?

gloomy tiger Apr 6, 2018, 6:34 PM

#

No-no.

#

If I don't have NCDS, they don't get invisible.

#

I mean, if the NCDS is higher.

#

If I was spawned at 0, 0, 0 and the other character was spawned at 100, 100, 0

#

the character spawned at 0,0,0 must go near to 100, 100, 0 to make the character spawned at 100, 100, 0 get noticed of it

#

one thing that is true is that I'm changing the camera in runtime

#

i mean, the player's camera

winged badger Apr 6, 2018, 6:39 PM

#

changing it how?

gloomy tiger Apr 6, 2018, 6:44 PM

#

📎 unknown.png

#

Grrr, the collision is there!!!

#

Yeah, that's it.

#

When a player connects to the server, it is given to him the opportunity to choose a character to play with. During this time, the player has a specific camera. Once the character is chosen, then I spawn that character, make the player controller owns it and Set View Target With Blend to the camera of that character (it's a topdown game).

sharp spire Apr 6, 2018, 7:03 PM

#

@icy nacelle maybe you can teach me a few things I’m in dire need of help with understand multiplayer. I understand nearly every part of UE4 except that

#

I sort of understand the concept of authority switching and server executed events to replicate certain features but I cannot understand why that process is needed and how exactly to go about fully implementing multiplayer

west rapids Apr 6, 2018, 7:06 PM

#

The process is needed cuz u don't want Player A moving his pawn, resulting him moving everyone's pawn.

#

its also there to sync states

sharp spire Apr 6, 2018, 7:06 PM

#

But why would you need a separation for that? Wouldn’t the client always send the server info?

west rapids Apr 6, 2018, 7:06 PM

#

u dont want Player A dictating everyone what their health is

#

You want the server to handle these things

#

like setting health

#

or applying damage

sharp spire Apr 6, 2018, 7:07 PM

#

I’m and switching gear aswell yes?

#

Just trying to understand lol

west rapids Apr 6, 2018, 7:08 PM

#

look, think of it this way, the ONLY thing a client can do in order to affect gameplay, is to request the server to do it for him

#

so the only hook you have is running an RPC on the server

#

from a client

sharp spire Apr 6, 2018, 7:08 PM

#

I have skeletal meshes attached to sockets for gear (common I assume ) how would I go about replicating that?

west rapids Apr 6, 2018, 7:09 PM

#

replicate the gear variable and then set it on the server

#

i assume ur talking about gear ID

#

not sending the mesh through

sharp spire Apr 6, 2018, 7:10 PM

#

So having the skeletal mesh set to replicate won’t do all the work, I need to add an rpc before my equip function? (Entire functions can be replicated by just calling the whole function via rpc right?

#

Not the gear ID, just the mesh to be viewable

west rapids Apr 6, 2018, 7:10 PM

#

depends on how ur run it

#

like, if u equip ur gear on the client, nobody will see it

#

u gotta ask the server to equip it

#

cuz u can imagine a client saying "I will equip Sword of Destruction +999999"

#

and then wreck everyone

sharp spire Apr 6, 2018, 7:11 PM

#

Alright so I have an enum in my item struct that decides where my gear goes and just simply has an input of masterItem_class, that entire function can be called through an rpc and it’ll solve it?

west rapids Apr 6, 2018, 7:12 PM

#

technically yes

sharp spire Apr 6, 2018, 7:12 PM

#

Or do I need to make the rpc integrated into the function not just calling the function by rpc

west rapids Apr 6, 2018, 7:12 PM

#

ull probably be replicating the struct too, but then theres net optimization to consider

sharp spire Apr 6, 2018, 7:12 PM

#

Hmm

#

So I technically don’t need the entire function called

west rapids Apr 6, 2018, 7:12 PM

#

u can only run events on the server

#

Functions can't be

sharp spire Apr 6, 2018, 7:13 PM

#

Just a portion of it

west rapids Apr 6, 2018, 7:13 PM

#

cant have an RPC with an output

sharp spire Apr 6, 2018, 7:13 PM

#

I can’t run an event to call a function ?

west rapids Apr 6, 2018, 7:13 PM

#

u can, but what im saying is u can only have inputs on ur RPC

#

and generally if u wana do that

#

ud be better off with a RepNotify

sharp spire Apr 6, 2018, 7:14 PM

#

Rep notify can have an output?

#

I believe my equipitem doesn’t need an output it could be a pure function

west rapids Apr 6, 2018, 7:14 PM

#

i mean instead of RPC into a function, just RepNotify a variable and have the logic then and there

sharp spire Apr 6, 2018, 7:14 PM

#

So a repnotify on my equipment array to set my mesh?

#

That would handle the heavy lifting?

west rapids Apr 6, 2018, 7:15 PM

#

Zlo would be able to explain it much better than I can

#

Yeah u could, but RepNotify runs when u update a value

#

so ud be replicating the whole array

sharp spire Apr 6, 2018, 7:16 PM

#

Is replicating an array a bad thing? It’s only a length of 14 or so

west rapids Apr 6, 2018, 7:16 PM

#

Im not sure what will happen if u have 1000 items and change 1, if only that one will be sent across or if its gonna be the entire array

sharp spire Apr 6, 2018, 7:16 PM

#

I can’t imagine it’ll ever pass 20

west rapids Apr 6, 2018, 7:17 PM

#

i couldnt tell u, should really ask Zlo, the guy is a ninja

sharp spire Apr 6, 2018, 7:17 PM

#

I will when I get out of work thank you so much for your help

west rapids Apr 6, 2018, 7:17 PM

#

Look, if I were to do something like that, I'd have my gear in a Datatable

#

based on a struct that has an ID

#

I would replicate the ID and then equip that, since it would only use up an int instead of a mesh

#

as long as everyone has the same ID, then you handle equipment clientside

#

Then again, im not the best source of advice on this topic, i recommend asking someone more experienced

#

But at the end of the day, get it to work first

#

optimize/refactor later

sharp spire Apr 6, 2018, 7:32 PM

#

So you’re saying having each item on an ID list and displaying your gear based on ID would be the smartest method? I don’t even know how to go about doing that, right now I have a masterItem class that handles both equipment and items and had a master function for equipping gear if it’s of type equipment. There isn’t a way of having the server know of these meshes already and display them? In the long run I’d like to add vertex paint to paint your gear and items; would that still work on a database system?

west rapids Apr 6, 2018, 7:34 PM

#

Probably would work, if you can store the color there, which im pretty sure u can.

#

And there is a way, u can always replicate the mesh

#

i dont know how uve structured ur inventory system so im talking blind here, but if u have a master equip function on every item, fire that on the server and then multicast. it should work.

sharp spire Apr 6, 2018, 7:54 PM

#

Multicast the the equipment variable, or something in my inventory?

#

I’m not actually familiar with multicast, what is it’s main purpose?

west rapids Apr 6, 2018, 7:56 PM

#

read cedric's network compendium, its pinned here. it explains it well.

sharp spire Apr 6, 2018, 7:56 PM

#

I have it read it, it was a few months back when I wasn’t so handy with unreal so rereading it may serve some justice but it’s still hard to see his point of view in my games perspective

west rapids Apr 6, 2018, 7:57 PM

#

https://gyazo.com/a2f248439a7af6698d05c2b7c547e3ff

Gyazo

#

this should ring some bells

sharp spire Apr 6, 2018, 8:00 PM

#

So much to learn.. I’ve seen everything in there but entirely confident in any part of it ._. Thank you for your help 😃 I’ll reread Cedric’s guide

thin stratus Apr 6, 2018, 8:16 PM

#

Print it. Pin it. Read it on your toilet, in the bed, while you walk the dog, when you are supposed to work on your boring actual job.

#

You need to know it so good that I could wake you in the middle of the night and you could read every page backwards.

#

Mostly because I forgot what I put into it

sharp spire Apr 6, 2018, 8:20 PM

#

Alright I will, and just to clarify, an rpc is simply an auth check and running it through the server, right?

west rapids Apr 6, 2018, 8:20 PM

#

Look, just think the server as the Master, and the client as the filthy Slave.

#

the only thing the Slave can do is ask permission

#

The auth check is not an rpc

#

because you have copies of things on the server

#

the check is there to figure out where ur running

#

Like lets say u got a pawn, theres a copy of it on the sever, and a copy on each client.

#

just print some strings and ull figure out out

sharp spire Apr 6, 2018, 8:27 PM

#

Why would anything ever run on the server to begin with though? Wouldn’t the client always ask the server?

thin stratus Apr 6, 2018, 8:29 PM

#

Cause every executes on all of them

#

If a class exists on Server and Client

#

Then Tick and BeginPlay call on them too

#

That's not even replication

#

That's just because the instance exists on all of them

#

An RPC is just to tell Server, Client or Everyone to do something

#

Your TV REMOTE

#

Is doing RPCs

#

To tell the TV that it should do something

#

RPCs can go from Client to Server, Server to Client and Server to Everyone

#

While Client related things need the client to be an owner

#

(otherwise the server wouldn't really know who to send the RPC to)

west rapids Apr 6, 2018, 8:35 PM

#

There's only one thing I'm not clear about when it comes to Multicasting

#

If you have MC event from server that moves an object, it should it for all clients

#

right?

thin stratus Apr 6, 2018, 8:36 PM

#

All that are relevant

west rapids Apr 6, 2018, 8:36 PM

#

so this isn't wrong?

#

https://gyazo.com/c949ede3e036d5f2ca4e8db45cc5b0bf

Gyazo

thin stratus Apr 6, 2018, 8:36 PM

#

AddMovement is already replicated

west rapids Apr 6, 2018, 8:37 PM

#

hah, didn't know

#

either way it only moves it for 1 client

#

and its set to always relevant

#

so i dont know where to debug this

west rapids Apr 6, 2018, 8:59 PM

#

I can get it work if I just set actor location on the server, but i know thats not very healthy since the client will dictate it

thin stratus Apr 6, 2018, 8:59 PM

#

Well AddMovementInput is something you call locally

#

Or on the ListenServer

#

For a playerOwned Character

#

CharacterMovementComponent does the rest

west rapids Apr 6, 2018, 8:59 PM

#

yeah this is a player owned pan with a movement component

thin stratus Apr 6, 2018, 8:59 PM

#

Pawns don't move with that

west rapids Apr 6, 2018, 8:59 PM

#

not charachter move

thin stratus Apr 6, 2018, 8:59 PM

#

Yeah okay

#

Then they move

#

But that should still move

#

If they are replicated

west rapids Apr 6, 2018, 9:00 PM

#

aye

#

but it dont

thin stratus Apr 6, 2018, 9:00 PM

#

I just recently did a test

#

gimme a sec

west rapids Apr 6, 2018, 9:00 PM

#

and its not like im doing something fancy, an Input on the controller does this on the pawn

thin stratus Apr 6, 2018, 9:02 PM

#

Which movementComp do you use?

west rapids Apr 6, 2018, 9:02 PM

#

FloatingPawnn

thin stratus Apr 6, 2018, 9:02 PM

#

I just see that I'm only settings and replicating location for pawns

west rapids Apr 6, 2018, 9:02 PM

#

yeah but that dont happen on my end, location doesn't get replicated

#

https://gyazo.com/dbfe583f1aaf11c502f628b15a014050

Gyazo

#

with this it does

#

dont even have to multicast or anything

thin stratus Apr 6, 2018, 9:03 PM

#

Well AddMovement seems to def not work with a standard floatingpawnmovement

west rapids Apr 6, 2018, 9:04 PM

#

ok so im not crazy

thin stratus Apr 6, 2018, 9:04 PM

#

No, this is kinda normal

#

They are not designed for MP out of the box

west rapids Apr 6, 2018, 9:04 PM

#

i distinctly remember it replicating position b4

#

on default pawn

#

ok, i know at least its not designed for that

#

thanks

thin stratus Apr 6, 2018, 9:05 PM

#

📎 unknown.png

#

That setup works to move them

#

But you have 0 prediction or interpolation in there

#

The only "Proper" component is the CharacterMovementComponent

west rapids Apr 6, 2018, 9:06 PM

#

aye with locations

thin stratus Apr 6, 2018, 9:06 PM

#

And even that doesn't work properly for Server when viewing clients

west rapids Apr 6, 2018, 9:06 PM

#

well theres an interesting sideffect tho

#

I noticed that the higher the NetUpdateSpeed, the slower the object moves

#

and i mean its very notice-able, at least with AddMovement

#

It seems like that whole component is kinda useless for network

#

and a character movement is xclusive

thin stratus Apr 6, 2018, 9:10 PM

#

https://puu.sh/zXIbL/b25e61325e.gif

#

Can't fully see it, cause of the shitty framerate

#

Controller Client 2

#

And Server ins't interpolating him

#

So Client one looks smooth (obviously delays cause of the highping)

#

While the Server sees client two lagging

#

Or at least stuttering

#

Cause no interp

west rapids Apr 6, 2018, 9:11 PM

#

whats the console command for that window?

thin stratus Apr 6, 2018, 9:11 PM

#

Custom made

west rapids Apr 6, 2018, 9:12 PM

#

ic, would be awesome if there was one 😄

#

well, imma stick to AddMovement, cuz im doing some idiotic shit like 2 players on 1 keyboard

thin stratus Apr 6, 2018, 9:12 PM

#

rip

west rapids Apr 6, 2018, 9:12 PM

#

and imma just replicate the position

#

though the movement speed dropping inverse to the netupdate is puzzling to me

#

but man thats a neat setup, gotta make meself one of those as well

#

And another thing, I find it strange that the Pawn class has a RelicateMovement bool available. If you gotta replicate position by hand, why would it even be available as an option.

thin stratus Apr 6, 2018, 9:21 PM

#

Cause enabling that makes sure that it's replicated for the other clients too

#

You don't have to replicate the position further than the server

#

So only local client and server need to set it

#

RepMovement takes care of the other clients

#

(given the root component replicates i think)

west rapids Apr 6, 2018, 9:24 PM

#

i see, i was under the impression that checkbox was replicating across the whole range of machines

#

@thin stratus thanks.

thin stratus Apr 6, 2018, 9:25 PM

#

It does

#

But local client doesn't want to wait for server does he

west rapids Apr 6, 2018, 9:25 PM

#

nope

#

so just setting it on server should reflect it for all

#

without any multis or loops

full bane Apr 7, 2018, 1:08 AM

#

can I replicate TQueue?

fossil spoke Apr 7, 2018, 2:23 AM

#

Not out of the box no

neon mango Apr 7, 2018, 2:41 AM

#

Is a fixed substep better for multiplayer physics based games?

grand kestrel Apr 7, 2018, 4:40 AM

#

Yes

#

Probably wanna go to #legacy-physics though

cloud ledge Apr 7, 2018, 4:43 AM

#

I mean, it depends, but "yes" is a good answer. There's a little bit more to it than just fixed timestep

#

(substepping is not a form of fixed timestep by default btw)

tulip creek Apr 7, 2018, 4:53 AM

#

How would you guys store player information for future use? In-game currency system or level progression without losing data upon uninstall

grand kestrel Apr 7, 2018, 4:58 AM

#

@cloud ledge As far as a non-physics channel goes I'll stand by my 'yes' as I pointed him to the right place 😉

#

Hehe

cloud ledge Apr 7, 2018, 5:00 AM

#

@tulip creek steam cloud

#

Like

#

You can store a very small amount of data per-account through steam achievments, but you can also store it in the steam cloud itself

tulip creek Apr 7, 2018, 5:15 AM

#

@cloud ledge Any suggestions on a service we could use if we mainly build with BP and want to enable Steam users to play with users from other platforms?

cloud ledge Apr 7, 2018, 5:16 AM

#

Not really, sorry. I could suggest running a custom server that tracks this stuff or doing same in the cloud, but I can't really help 😄

#

For our game we are planning to keep a limited database for some stats of some players, but it will be a very small database that can be handled by any modern server

floral ingot Apr 7, 2018, 6:00 AM

#

Using a custom movement component on a pawn, trying to network it. I've got it so that the pawn will send its movement to the server, but the autonomous proxy isn't being updated. I can move the server server and it updates all clients, using input on the client works, and updates its position on the server, but it isn't filtering back down to the clients.

Can anyone offer an insight?

https://pastebin.com/v8xr7Q2d
Pastebin
[C++] MovementUE4 - Pastebin.com

Also is there a way to use the AddInputVector() instead of SetActorLocation()? SetActor just ignores any collision

Pastebin

[C++] MovementUE4 - Pastebin.com

slim holly Apr 7, 2018, 7:27 AM

#

SetLocation does't ignore collision if you sweep

hidden thorn Apr 7, 2018, 8:56 AM

#

I just realized that when I join a server I always join the first one because I loop through my search results and get the first one available.

#

I found this ```cpp
// Once we found a Session that is not ours, just join it. Instead of using a for loop, you could
// use a widget where you click on and have a reference for the GameSession it represents which you can use
// here

#

But I just can't seem to find a way of doing it

#

I thought I could create a variable of FOnlineSessionSearchResult SearchResult on the widget and when I search for a server I assign the result to each widget, but I keep getting an error.

grand kestrel Apr 7, 2018, 9:08 AM

#

I'm creating spline mesh components procedurally in editor, but they spam warnings when stood on:
LogNetPackageMap: Warning: FNetGUIDCache::SupportsObject: SplineMeshComponent /Game/Maps/UEDPIE_2_DevMap.DevMap:PersistentLevel.BWPath_3.BWPath_3_Tile1_0 NOT Supported.
Why is it trying to replicate components that are not set to replicate?

slim holly Apr 7, 2018, 9:28 AM

#

@hidden thorn as long as game instance handles the session finding and joining, you shouldn't get any errors. I've never had issues saving session results to child widgets

hidden thorn Apr 7, 2018, 9:29 AM

#

It is my bad as I didn't mention where the error is coming from

#

As a parameter where I pass the SearchResult I am doing this const FOnlineSessionSearchResult& SV_SearchResult

#

void UpdateWidget(FString Name,int MaxPlayers, int Ping, const FOnlineSessionSearchResult& SearchResult);

#

https://i.imgur.com/R5wWeVh.png

Imgur

#

Obviously I am not doing correctly but online all I found was BP versions which isn't helpful

slim holly Apr 7, 2018, 9:31 AM

#

well I'd say this is probably done easier in BP

#

ok so once findsessions returns the array of sessions, you generate the child widgets for each session found

#

are you sure the session struct is passed correctly?

thin stratus Apr 7, 2018, 9:35 AM

#

That sounds strickly like you trying to use a C++ struct in BPs

#

Without marking it USTRUCT

hidden thorn Apr 7, 2018, 9:38 AM

#

@thin stratus I am not trying to use BPs at all, I was just saying that all i found was BP related.

#

//GameInstance.cpp
void UNWGameInstance::OnFindSessionsComplete(bool bWasSuccessful)
{
    IOnlineSubsystem* const OnlineSub = IOnlineSubsystem::Get();
    if (OnlineSub)
    {
        IOnlineSessionPtr Sessions = OnlineSub->GetSessionInterface();
        if (Sessions.IsValid())
        {
            GEngine->AddOnScreenDebugMessage(-1, 5.0f, FColor::Red, FString::Printf(TEXT("Num Search Results: %d"), SessionSearch->SearchResults.Num()));

            Sessions->ClearOnFindSessionsCompleteDelegate_Handle(OnFindSessionsCompleteDelegateHandle);

            if (SessionSearch->SearchResults.Num() > 0)
            {
                for (int32 SearchIdx = 0; SearchIdx < SessionSearch->SearchResults.Num(); SearchIdx++)
                {
                    UpdateWidget(ServerName, MaxPlayers, SessionSearch->SearchResults[SearchIdx].PingInMs, SessionSearch->SearchResults[SearchIdx]);
                }
            }
        }
    }
}

//WidgetRow.h
void UpdateWidget(FString Name, int MaxPlayers, int Ping, const FOnlineSessionSearchResult& SearchResult);

winged badger Apr 7, 2018, 9:42 AM

#

its from code

thin stratus Apr 7, 2018, 9:42 AM

#

Well what is UpdateWidget doing?

winged badger Apr 7, 2018, 9:42 AM

#

soo its an unssuported specifier i think

thin stratus Apr 7, 2018, 9:42 AM

#

Usually you create a widget per result

hidden thorn Apr 7, 2018, 9:44 AM

#

void UWidgetRow::UpdateWidget(FString Name, int MaxPlayers, int SV_Ping, const FOnlineSessionSearchResult& SearchResult)
{
    this->SetVisibility(ESlateVisibility::Visible);

    SV_Name            = Name;
    SV_Players        = FString::FromInt(MaxPlayers);
    SVPing            = FString::FromInt(Ping);

    SV_SearchResult    = SearchResult;

    bIsAvailable = false;
}

thin stratus Apr 7, 2018, 9:45 AM

#

Yeah but which Widget are you updating?

#

And what errors are you getting

hidden thorn Apr 7, 2018, 9:46 AM

#

https://i.imgur.com/R5wWeVh.png

Imgur

winged badger Apr 7, 2018, 9:46 AM

#

i'm interested in that exactly

#

ServerList.h around line 37

thin stratus Apr 7, 2018, 9:46 AM

#

But that's a blueprint thing

#

Yeah the line 37, you are probably exposing it via UPROPERTY

#

even though this is not a BP type

#

Or something like that at least

hidden thorn Apr 7, 2018, 9:47 AM

#

Ah I see

#

UFUNCTION(BlueprintCallable, Category = "ServerList")
void RefreshServersList(FString Name, FString Mode, FString Map, int CurrentPlayer, int MaxPlayers, int Ping, const FOnlineSessionSearchResult& SearchResult);

winged badger Apr 7, 2018, 9:47 AM

#

yep

thin stratus Apr 7, 2018, 9:48 AM

#

Yeah you can't pass that parameter

hidden thorn Apr 7, 2018, 9:48 AM

#

Oh ok

thin stratus Apr 7, 2018, 9:48 AM

#

You need either your own struct, or use Epic's BlueprintSessionResult

#

And make sure it's exposed to BPs via USTRUCT etc

hidden thorn Apr 7, 2018, 9:49 AM

#

Oh ok, i will keep that in mind, I don't actually want to expose it to BP as there is not need for that

thin stratus Apr 7, 2018, 9:49 AM

#

Also don't get how update widget is supposed to create a serverlist for you, or is that not what you want?

winged badger Apr 7, 2018, 9:50 AM

#

its UWidgetRow::UpdateWidget

hidden thorn Apr 7, 2018, 9:50 AM

#

It does but there is a lot more code that was unnecessary

thin stratus Apr 7, 2018, 9:50 AM

#

So you removed code that we can't see

#

Well then okay

hidden thorn Apr 7, 2018, 9:51 AM

#

in GameInstance I actually call RefreshServersList(...); that loops through ```cpp
void UServerList::RefreshServersList(...)
{
for (int i = 0; i < ServerListRows.Num(); i++)
{
if (ServerListRows[i]->bIsAvailable == true)
{
ServerListRows[i]->UpdateRow(...);
break;
}
}
}

#

I get that its better to post all the code but it was just a lot of it that didn't mean anything really

thin stratus Apr 7, 2018, 9:53 AM

#

Hm okay

#

I usually just regenerate the list

#

So removing the widget in the ServerList and spawning a new entry per result

#

Could reuse old ones but well

#

Anyway, do you still have any errors or is everything fixed now?

hidden thorn Apr 7, 2018, 9:54 AM

#

I recompiled and the error is gone, thank you.

#

What I do is in my widget server list I created like 50 rows all hidden, then I call RefreshServersList and check if it's available or not and if it is I set it to visible

winged badger Apr 7, 2018, 9:56 AM

#

the overhead of creating a widget is tiny

#

and insignificant while you're in a menu

hidden thorn Apr 7, 2018, 9:56 AM

#

So what if you have 1000s of servers

thin stratus Apr 7, 2018, 9:57 AM

#

First off, you probably wouldn't ever query so many servers

#

But let's say you do, as said, I create the widget on the fly.

#

my ServerList is empty

#

And per SearchResult, I create a new widget of "ServerEntry" type and add it to the ServerList

#

Well and clearing the list when refreshing

#

Might be not the best in performance, but it's in the main menu and people usually don't refresh THAT often

#

Other way would be a page system

#

Where you have x results per page

#

Then you just use some simple math to divide the 1000 server array into sub pages of 50 entries

#

e.g. 0-49 Page 1, 50 to 99 page 2 etc.

hidden thorn Apr 7, 2018, 10:01 AM

#

I remember you mentioned this before, also what do you mean by query so many servers

versed socket Apr 7, 2018, 10:12 AM

#

Have you guys ever had any trouble using a Client->Server RPC to update a Struct variable?

#

My Client is sending a RunOnServer RPC to Set a struct variable in the PlayerController, but even though the client says that the PlayerController assigned it correctly... the Server says that nothing happened.

#

Here's a demonstration of what I mean

📎 unknown.png

#

These are the only places where Structs are ever manually assigned, which makes this even weirder.

#

Even if I set the Struct to be Replicated, it has no effect on the issue.

#

I've never seen this before -- assigning something on the server-side is supposed to assign it on the server... but for some reason the server reads the struct as if it had all default values.

#

Maybe I just need to send the classnames and then manually assign each one in the struct on the server itself, rather than build it on the client and send the packaged thing to the server.

#

Ah, well I'll be damned -- Blueprint Events are not capable of moving Structs!

#

Yup! Turns out, you can't pass a Struct through an RPC event in Blueprints. You have to pass the components of the Struct through and then manually build the Struct after the event is called!

slim holly Apr 7, 2018, 10:36 AM

#

vector3 is a struct

#

📎 unknown.png

#

it's a ref

thin stratus Apr 7, 2018, 10:45 AM

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@hidden thorn Most people only query about 20-40 Servers and making sure they are already filtered

hidden thorn Apr 7, 2018, 11:04 AM

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Is this what you query is SessionSearch->MaxSearchResults = 20;

thin stratus Apr 7, 2018, 11:08 AM

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Yeah

versed socket Apr 7, 2018, 11:31 AM

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@slim holly I've also tried unchecking that box so that it's not just a ref but it still didn't seem to work

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I had actually set it that way as a sort of exasperated attempt at making it work

slim holly Apr 7, 2018, 11:32 AM

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Just pointing out that client reference cannot be valid on server

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and vice versa

versed socket Apr 7, 2018, 11:37 AM

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You're right

hidden thorn Apr 7, 2018, 12:48 PM

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@thin stratus So if for example there are 100 servers available but the MaxSearchResult is only 20, how are you gonna access the other 80?

thin stratus Apr 7, 2018, 12:49 PM

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Well 20 is quite the low number, but 1000 is also quite high

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I guess querying 100 servers is fine

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I doubt any player would even go through that many

hidden thorn Apr 7, 2018, 12:49 PM

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I just looked at gmod because there are usually thousands of servers online, when I clicked on a category that had over 1000 of servers only about 100 were displayed.

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The question still remains, how do you access them?

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Or is there no way?

thin stratus Apr 7, 2018, 12:50 PM

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Well you'd need to actually query them all

hidden thorn Apr 7, 2018, 12:50 PM

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oh damn

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I did a for loop to create 100 widgets (server rows) to check the fps.

1: No rows about 400+ fps
2: 100 rows max 120fps
3: 1000 rows max 20fps if I scroll through the list, if I drag the scrollbar it goes down to 5fps

thin stratus Apr 7, 2018, 1:06 PM

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That's why I said use pages

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Only show x results per page

icy nacelle Apr 7, 2018, 1:55 PM

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Trying to get my head around network replication once again, and I'm looking at an error that keeps popping up with my 'Add to Inventory' function.
Right now, it puts in a struct which gets added to an array of structs, 'inventory'.
If I'm running 'Add to Inventory' on server, should I be inputting the array into this function?
As a side note, 'Add to inventory' basically just finds the first empty index in the array and puts it there.

📎 Untitled.png

wary willow Apr 7, 2018, 2:42 PM

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@icy nacelle it's funny but not really

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Try reading a few mags back

icy nacelle Apr 7, 2018, 2:44 PM

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Oh? I thought if its running on server, its getting the server's inventory array and not the players? I'm getting a weird error pop up in my function as the array length isnt what the game thinks it is

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(Please excuse my spaghetti)
Right here, this branch is pulling up weird errors. I know that obviously I'm looping for one more index than I need to be, as I'm looping by length of the array, but if I do a for each loop, the item doesn't go into the inventory correctly.

📎 Untitled.png

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Any idea @wary willow?

boreal vine Apr 7, 2018, 3:52 PM

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Hi, has any one made a multiplayer sports ball game? i.e golf, soccer, pool?

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I'm making a golf game and struggling to accurately replicate the balls location. I'm running the physics on the ball on the server but it ends up in deferent locations on both clients (I'm using dedicated server)

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I'm new to replication so please be as descriptive as possible with any feedback. Thanks

icy nacelle Apr 7, 2018, 4:35 PM

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@boreal vine If you're new to networking, I highly reccomend you read through the Network Compendium by Cedric

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http://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf

boreal vine Apr 7, 2018, 4:36 PM

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@icy nacelle thanx for that

icy nacelle Apr 7, 2018, 4:36 PM

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np

boreal vine Apr 7, 2018, 4:39 PM

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@icy nacelle wow this is amazing but do i have enough printer paper 😃

thin stratus Apr 7, 2018, 5:12 PM

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Take the white version if you print it

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Is linked on the page it self (outside the pdf)

boreal vine Apr 7, 2018, 6:21 PM

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@thin stratus yup, thats the one I used

sharp spire Apr 7, 2018, 6:52 PM

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hey everyone im back, i re-read Cedrics Bible. On page 108; (https://gyazo.com/ac645ff27f865b6f47d6c0ccc241cfe5) are these ran in windows cmd? or ue console

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@thin stratus

thin stratus Apr 7, 2018, 6:54 PM

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Windows

sharp spire Apr 7, 2018, 6:54 PM

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aah 😄

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thank you

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im going to re-read it again, as i found it hard to understand the beginning until i finished (as for most new things lol) thank you for the helpful guide. i still have similar questions to yesterday but maybe i wont after i re-read it again

thin stratus Apr 7, 2018, 6:56 PM

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📎 Start_ListenServer.bat

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Edit that bat file to start a ListenServer with it

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YOu can modify it to support the other things, like DedicatedServer etc.

sharp spire Apr 7, 2018, 7:07 PM

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thank you very much 😃

marsh shadow Apr 7, 2018, 7:09 PM

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does anyone use multiple gamemodes using open level game="Game/.../Gamemode.Gamemode"

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cause if i make a game like that

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it creates the game

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and the gamemode is correct

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but it's like the listen server isn't innitiating

sharp spire Apr 7, 2018, 7:11 PM

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im considering making a side game to learn this multiplayer process, is making a top down style game difficult to replicate? not sure if its just thirdperson template thats replicated by default; and if its just the simple replicate toggle in the default settings

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also is multiplayer all that more difficult on a mobile device? or is it simply just setting up the subsystem correctly?\

severe widget Apr 7, 2018, 7:13 PM

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You gotta make sure you handle network compensation more, I'd imagine, vs a platform where most will have wired.

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Other than that, its mostly OSS stuff to get the session started.

sharp spire Apr 7, 2018, 7:13 PM

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alright awesome thank you very much @severe widget 😃

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what about replicating racing games? sorry for such ridiculous questions.. is it as simple as replicating its location and car animation/tires?

severe widget Apr 7, 2018, 7:20 PM

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I mean. TECHNICALLY it can be as simple as replicating state.

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Normally you wouldn't replicate animations, or even tires.

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You'd replicate the position, and then continuously update everything else

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Its a deep topic and many people far more qualified than me have probably explained.

sharp spire Apr 7, 2018, 7:21 PM

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haha its alright i know more about open world 3rd person games ill stick with that for my multiplayer project

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im going to try making a top down survival multiplayer game

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i got a decent amount done in my 3rd person pc project but wasnt coded for multiplayer from the ground up so im taking this as a way to learn

boreal vine Apr 7, 2018, 8:09 PM

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waht does the reliable check box actualy do?

winged badger Apr 7, 2018, 8:57 PM

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"makes sure" the function will get executed

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unreliable functions can be droppd due to network congestion, but reliable ones will retry until they make it

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point of reference for reliable/unreliable: all functions replicating the movement to server in the CMC are unreliable

marsh shadow Apr 7, 2018, 9:05 PM

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for anyone wondering what how to setup the options in open level to a game mode

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you do listen?Game="Game/.../GM.GM"

thin stratus Apr 7, 2018, 9:09 PM

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You actually do ?game=GAMEMODESHORTCODE

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While setting up GAMEMODESHORTCODE in your project settings

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:P

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@marsh shadow

marsh shadow Apr 7, 2018, 9:10 PM

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yes

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and full ref work

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too i think

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@thin stratus

thin stratus Apr 7, 2018, 9:12 PM

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It does, but the shortcode way is a bit easier :P

marsh shadow Apr 7, 2018, 9:12 PM

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in 4.9

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it was full ref

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_C

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i' started working on an old project again

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and i was like WTH isn't it making a listen server

spare glade Apr 8, 2018, 1:32 AM

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So i recently did something to cause this following error on my dedicated server instance: LogOnline: Warning: OSS: No game present to join for session (GameSession)| I get this error for Every client Join Request then the error, then join succeeded | im currently just running our code through blueprints, but i cant seem to find the root of the problem, if i were to start a new project and start dedicated and 2 clients in standalone it would work fine, ive tried using the nodes of Create session and Create Advanced Session through Advanced sessions plugin, so was wondering if theres anything specific i need in the game mode at game state: entering map to create the session needed properly?

versed socket Apr 8, 2018, 2:32 AM

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@spare glade If I remember right, that log message only happens when you try to join a session in the PIE?

spare glade Apr 8, 2018, 2:33 AM

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i have it in standalone launch which is wierd

floral ingot Apr 8, 2018, 4:31 AM

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MP Pawn Movement:
Just wondering if I'm doing this correctly (noob to multiplayer). Seems to be working even with lag set to 500+

📎 Capture.JPG

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Location and rotation is being updated on all clients/server

floral ingot Apr 8, 2018, 5:10 AM

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Using it to move pawn on clients/server then update everyone else to the new position

frank copper Apr 8, 2018, 5:19 AM

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is that character movement?

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if so, movement it's already replicated by character movement component

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including the corrections and so on

floral ingot Apr 8, 2018, 5:22 AM

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nah using floatingpawnmovement, i tried character movement but it was such a pita to work with the collision on my pawn mesh i went back to it

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another issue is the clients 'jerky' movement to the new positions, but i think its because im doing it independent of the frame rate perhaps

frank copper Apr 8, 2018, 5:24 AM

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you're getting jittery movement because server is receiving a location at the same time your client changed it so it tries to set your client

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and i don't think it's easy to fix that

floral ingot Apr 8, 2018, 5:25 AM

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hmm

frank copper Apr 8, 2018, 5:26 AM

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if you would do it in c++ and modify an existing component that handles this network corrections

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you could get over it

floral ingot Apr 8, 2018, 5:27 AM

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i started in C++ but decided to prototype it in BP, so it is a possibility

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but wether its out of my skill set is another issue haah

frank copper Apr 8, 2018, 5:27 AM

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like character movement component, you won't see jittery movement even if you set lag

floral ingot Apr 8, 2018, 5:28 AM

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i did start with the character movement component, but had issues with changing the static mesh to my pawn and then having collisions never work unless it was the capsule component that was the root of the character

frank copper Apr 8, 2018, 5:28 AM

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with your setup if you set lag or even run client and server on different machines, you're prone to jittery movement

floral ingot Apr 8, 2018, 5:29 AM

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from what ive read it seems character needs the capsule for its movement stuff to work

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if i could ignore collisions on the capsule, and then use the static mesh's collision it might work

frank copper Apr 8, 2018, 5:29 AM

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you can set the capsule to ignore certain collision channels

floral ingot Apr 8, 2018, 5:29 AM

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but it had probs with it falling through floors, never registering blocks etc no matter the collision settings

frank copper Apr 8, 2018, 5:29 AM

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so won't interfere with specific world objects

floral ingot Apr 8, 2018, 5:30 AM

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would you still be able to use the collision from the static mesh though? the way i tried it, it would never work, and always result in it hitting the capsule regardless (unless turning it off)

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i might build a new project from scratch and muck around it with it again, see where it gets me

frank copper Apr 8, 2018, 5:31 AM

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but the character mesh has different collision

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it doesn't share capsule collision

floral ingot Apr 8, 2018, 5:31 AM

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yeah, i had it set to no collision on the capsule, and tried to use a static mesh instead of the default skeletal one that character gives you, but it would ignore the static mesh's collision regardless

frank copper Apr 8, 2018, 5:32 AM

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probably would be best to find a way with collisions setup rather than using this movement setup