#multiplayer | Unreal Source | Page 459

glacial pollen May 1, 2019, 6:18 AM

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Naturally i'm (ab)using it like nobodies business though.

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📎 unknown.png

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But I already have another trick up my sleeve for that
(I'll spawn the persistent audio separately, and just use the sequencer for the perfectly timed events)

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As of now, the LevelSequence binds onto itself (I made a LevelSequence Actor)
Then it calls its internal events, which calls the LevelSequenceActor event, makes for a nice
All-in-one, seamless travel to any level, LevelSequence xD

urban dew May 1, 2019, 6:37 AM

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I'm so stumped, how do I bug test multiplayer? everything works in standalone and editor

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but after i build

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it doesnt work.

glacial pollen May 1, 2019, 6:49 AM

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@urban dew are you using dedicated?

urban dew May 1, 2019, 6:49 AM

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P2P currently

glacial pollen May 1, 2019, 6:49 AM

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try this

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in the play settings

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📎 unknown.png

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turn off single process

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and open the output window

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📎 unknown.png

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right click anywhere in there and "clear log"

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then

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before you play

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open your project folder

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open saved

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open logs

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and delete everything there (you can't delete the most recent one)

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THEN hit play

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and you will see a second log

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play until whatever bug happens, and check both the output window and the second log

urban dew May 1, 2019, 6:52 AM

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i'll give it a go, will still allow me to actually play multiplayer in the editor? as it doesn't let me do mp

glacial pollen May 1, 2019, 6:52 AM

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I use it for multiplayer

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In the dedicated server setup, the output log is the client, and the 2nd log file is the dedicated server

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not sure how it works p2p

urban dew May 1, 2019, 6:59 AM

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ill give it a go

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thank you very much

glacial pollen May 1, 2019, 6:59 AM

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np

thin stratus May 1, 2019, 9:24 AM

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@stoic acorn What they show in the series is more or less what I sell on the Marketplace

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So if I make that tutorial, I could stop selling that item :D

stoic acorn May 1, 2019, 9:27 AM

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Link please

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I think I got demotivated by the 15th video when it became apparent that he wasn't teaching best practices

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and the fact that he was just rattling through placing nodes and not explaining what he was doing

thin stratus May 1, 2019, 12:22 PM

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@stoic acorn You do mean the Lobby video by epic or?

urban dew May 1, 2019, 1:14 PM

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in the editor multiplayer lan and internet where working

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now ive built the game, my friends wont see the servers at all

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tried hamachi same thing

stoic acorn May 1, 2019, 1:17 PM

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@thin stratus yep that's correct.

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I'm now more confused than when I started

thin stratus May 1, 2019, 1:37 PM

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@stoic acorn https://www.unrealengine.com/marketplace/en-US/slug/lobby-chat-group-and-more

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It's "only" a lobby + chat by now. The url name is outdated, can't adjust that.
Just read the description and check if that kit helps you

stoic acorn May 1, 2019, 1:39 PM

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Thanks man

twin minnow May 1, 2019, 2:01 PM

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just wondering, how are changes to variables in uaniminstances replicated in nativeupdateanimation? because recently I used a hasauthority check in nativeupdateanimation and the animinstance variables are replicated when the variables are updated client side, not server side.

plain flume May 1, 2019, 4:05 PM

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Hello! I asked this once before but didn't find any answer. Has somebody got idea how to replicate big arrays of data to clients? For example how does the Tilt Brush or other paint programs replicate all the data? I have a painting system that uses Static mesh instances. One painting might have 100-1000 instances per painting, depenging the stroke. What would be correct way to replicate all that data? There is tremendeous amount of lag when sending array that has like 500 elements to all clients.

bitter oriole May 1, 2019, 4:07 PM

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You'll need a non-real-time system for that that replicates asynchronously every 10 second or something

plain flume May 1, 2019, 4:13 PM

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Not sure how to start building that. Game also has a drop in and drop out so the painting should be replicated to new players smoothly also

grizzled stirrup May 1, 2019, 4:13 PM

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If you set different properties of an on rep struct on the server one after another (say location and direction), would this result in the onrep function being called twice on the clients, or would the engine know to only call it once if both properties were updated at the same time?

fleet raven May 1, 2019, 4:37 PM

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the onrep function will be called when the struct is replicated

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if you change them in the same frame, the update will contain both properties (this appears to always be the case for structs, unless anyone has proof of the contrary) and you'll get one onrep call when it arrives

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if you change them in different frames, it may be sent as multiple updates depending on whether it was replicated inbetween

grizzled stirrup May 1, 2019, 5:30 PM

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Ok great to hear thanks a lot!

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I'm assuming they'd always be in the same frame if called right after each other in the same function

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One other thing- in Shootergame SetRemoteRoleForBackwardsCompat(ROLE_SimulatedProxy); is called in the constructor of the projectile. The definition in AActor states that /** This function should only be used in the constructor of classes that need to set the RemoteRole for backwards compatibility purposes */

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Can anyone clarify what those backwards compatibility purposes are and if it's necessary to call that function on the constructor of replicated projectiles?

north swan May 1, 2019, 6:38 PM

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Hi guys. Do PlayerState->UniqueIDs stay the same after disconnecting even for LAN games? (Steam)

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oh scratch that, I think they should

plucky wadi May 1, 2019, 6:41 PM

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i have a question here.. does anyone have a blueprint multiplayer syncronization video that he/she can recommend? im quite new to this and cant really find any good videos that in the best case show how to do it aswell..

jolly siren May 1, 2019, 6:50 PM

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@thin stratus @chrome bay Have either of you guys upgraded to 4.22 yet?

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Running into some issues on it https://udn.unrealengine.com/questions/497363/view.html

grizzled stirrup May 1, 2019, 6:55 PM

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@jolly siren What does the issue revolve around?

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Just upgraded to 4.22 would be good to know what to look out for

jolly siren May 1, 2019, 6:56 PM

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Actor channels and seamless travelling

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 [2019.05.01-07.04.54:705][470]LogNetTraffic: Error: ReceivedNextBunch: Reliable bunch before channel was fully open. ChSequence: 1117, OpenPacketId.First: -1, OpenPacketId.Last: -1, bPartial: 0, Actor: None [UChannel] ChIndex: 34, Closing: 0 [UNetConnection] RemoteAddr: 134.209.52.101:7778, Name: IpConnection_0, Driver: GameNetDriver IpNetDriver_0, IsServer: NO, PC: FooPlayerController_BP_C_0, Owner: FooPlayerController_BP_C_0, UniqueId: 1047:76561198055505328
 [2019.05.01-07.04.54:705][470]LogNetTraffic: Error: UChannel::ReceivedRawBunch: Bunch.IsError() after ReceivedNextBunch 1

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First spawn doesn't possess character correctly^

fleet raven May 1, 2019, 6:57 PM

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does this link mean you have access to udn? br_thinking

jolly siren May 1, 2019, 6:58 PM

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     [2019.04.30-07.10.10:691][531]LogWorld: Bringing World /Game/Maps/Lobby.Lobby up for play (max tick rate 60) at 2019.04.30-07.10.10
     [2019.04.30-07.10.10:691][531]LogWorld: Bringing up level for play took: 0.000128
     [2019.04.30-07.10.10:691][531]LogWorld: ----SeamlessTravel finished in 0.10 seconds ------
     [2019.04.30-07.10.10:691][531]LogGameMode: Display: Match State Changed from EnteringMap to WaitingToStart
     [2019.04.30-07.10.10:691][531]LogGameState: Match State Changed from EnteringMap to WaitingToStart
     [2019.04.30-07.10.10:692][531]LogGameMode: >> GameMode::HandleSeamlessTravelPlayer: FooPlayerController_BP_C_0 
     [2019.04.30-07.10.10:692][531]LogGameMode: << GameMode::HandleSeamlessTravelPlayer: LobbyPlayerController_BP_C_0
     [2019.04.30-07.10.10:692][531]LogNet: Server connection received: ActorChannelFailure

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Players don't successfully travel back to lobby sometimes^

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Yeah I have UDN access

grizzled stirrup May 1, 2019, 6:58 PM

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What FPS are you running at?

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Noticed anything over 100 is very inconsistent in terms of possessing and spawning

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Might help if you cap at 60 and see if it still happens

fleet raven May 1, 2019, 6:58 PM

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unrelated, but could you maybe check if the udn thread linked here contains a solution? https://issues.unrealengine.com/issue/UE-24772

jolly siren May 1, 2019, 6:59 PM

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Running over 100 fps for sure

grizzled stirrup May 1, 2019, 6:59 PM

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Try the cap- wasted a few days with a similar issue and it was due to high fps and nothing else

fleet raven May 1, 2019, 6:59 PM

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it's strange how this bug from 4 years ago still exists

jolly siren May 1, 2019, 6:59 PM

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On 4.22 specifically kyle?

grizzled stirrup May 1, 2019, 6:59 PM

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I haven't tested in older versions but I definitely noticed it on 4.22

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Was wondering why the most basic thing wasn't working even in blank templates

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I guess something gets oversaturated with high fps and things don't get called correctly

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It worries me a bit as I'll probably have to cap my game FPS to make sure it doesn't happen

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Listen server btw not sure if it happens on dedicated too

jolly siren May 1, 2019, 7:00 PM

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Yeah we can't cap fps. I mean we could try doing it just at the beginning of the match and end

grizzled stirrup May 1, 2019, 7:01 PM

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Yeah that's probably a good workaround if it's the cause of your issue too

jolly siren May 1, 2019, 7:01 PM

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But would like to find out how to fix it in the engine

grizzled stirrup May 1, 2019, 7:01 PM

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Keep in mind though it also was affecting respawns for me

jolly siren May 1, 2019, 7:01 PM

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Were you getting it consistently or rarely?

grizzled stirrup May 1, 2019, 7:01 PM

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So sometimes players just never got respawned

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Consistently

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100% of the time at very high fps

jolly siren May 1, 2019, 7:01 PM

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because our issues are rare. But it's a big problem with hundreds of thousands of players

grizzled stirrup May 1, 2019, 7:01 PM

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Ah I see

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The respawn one happened very rarely

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But when it did I was suspecting the same high fps situation

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It happened to be oversaturated at the moment of respawning or something similar

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But yeah a blank third person template project with 2 player starts running a regular listen server- the server will always spawn but client will often miss the spawn and instead be at the origin

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If fps is high

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At capped to 60 or even 90, the client spawns 100% of the time

jolly siren May 1, 2019, 7:03 PM

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Hmm okay, we are using dedicated servers here. But that is interesting

grizzled stirrup May 1, 2019, 7:03 PM

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I mean it might happen on dedi too, I haven't tested

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Let me know if your issue is happening for similar reasons, very interested to see why it happens

jolly siren May 1, 2019, 7:04 PM

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@fleet raven The UDN thread has a lot of details, but also links an answerhub thread that you have access to https://answers.unrealengine.com/questions/97569/view.html

fleet raven May 1, 2019, 7:07 PM

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yeah but the answerhub does not contain a solution to the actual problem (reliable multicast should never be dropped without having to add a workaround)

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the way I "fixed" it is to take out the code setting the view target to nullptr after 1.5 seconds, since there was no explanation on why that was even a thing

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but I don't know if this breaks something unintentially

jolly siren May 1, 2019, 7:09 PM

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Right, Epic said that they will consider removing that code since they aren't sure if it is necessary, they think it may not be. Or at the very least making that timeout configurable

fleet raven May 1, 2019, 7:12 PM

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what is setting the view target to nothing even meant to achieve? there's no explanation on why it would do this

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it only seems to break everything

winged badger May 1, 2019, 7:13 PM

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it can break net relevancy

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IsNetRelevantFor uses the view target to determine relevancy, among other things

fleet raven May 1, 2019, 7:15 PM

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why would you want to break relevancy because the client has failed to send a packet in 1 second?

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that doesn't make sense

winged badger May 1, 2019, 7:16 PM

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i wouldn't

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but that is the code setting the viewtarget to null affects

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or at least, one part of it

balmy canopy May 1, 2019, 7:21 PM

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Hi everyone

I want to hear if someone here can assist me with advanced session dedicated server and a server browser because I hosted the server but I cant seem to find it in my server browser.

Just tell me if you want to see something so that I know what to screenshot for you.

Regards,

twilit swift May 1, 2019, 7:43 PM

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Hey all, anyone have experience with the network profiler? I'm trying to record a profile using the commands: netprofile enable/netprofile disable. It generates two files and neither has any network data or graph or anything when I open it in the network profiler.

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Not sure if this is the right place to post about that.

grizzled stirrup May 1, 2019, 8:04 PM

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For a custom game settings menu in the main menu (not already in a lobby), would the way games like COD work is that they'd save a struct of settings and the selected gamemode in the game instance, then travel to the actual map and set the settings / mode before begin play after retrieving them from the game instance?

spring ore May 1, 2019, 9:07 PM

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anyone able to point me in the direction of a good respawn tutorial?

dusty sleet May 2, 2019, 4:39 AM

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@spring ore if you understand how the initial spawn works with player starts.. you should be able to make a respawn easy enough. the multiplayer western shootout project had all the technical stuff for it back when it came out. maybe just look at that bp code .. probably still relevant

worthy perch May 2, 2019, 5:29 AM

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Anyone else think that OnRep()'s not being called on the authority is cumbersome?

winged badger May 2, 2019, 5:49 AM

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not at all

tawny parcel May 2, 2019, 6:20 AM

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Is replicating a small struct bad? Small being a bool and a float

winged badger May 2, 2019, 6:22 AM

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no

north swan May 2, 2019, 6:28 AM

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My PlayerState->UniqueId does not stay the same after reconnecting to a LAN Server. I'm using UWorks and Steam. It worked for my internet server though. Is there a difference or am I missing something else?

valid frigate May 2, 2019, 7:12 AM

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Good Morning

I'm working on a multiplayer stats system. Player information will be saved (Headshots, XP, Gold). The solution should work platform independent.
Does anyone have any tips on the subject or can recommend a plugin?

My approach would be the following:

UE4 Dedicated Game Server sends the data to Python Server. Python Server enters the data into a SQL Server.

thin stratus May 2, 2019, 7:22 AM

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@jolly siren Nope, haven't. Kinda need to with Client's project, but I fear all the bugs

drifting plank May 2, 2019, 7:54 AM

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Hey I didn't suceed to connect to the network compendium. Is it normal ?

real yacht May 2, 2019, 7:57 AM

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I have question, is there any case study, tutorial, pdf...anything .. how to support live events in game?

drifting plank May 2, 2019, 7:58 AM

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What do you mean by live event ? Stream on twitch ?

real yacht May 2, 2019, 8:01 AM

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live events like kill 10 enemies in 30min, and that event is setup on some server dashboard

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or destroy boss xyz to win 1000 gold

drifting plank May 2, 2019, 8:14 AM

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It's a goal ^^

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So you can handle them in GameState or PlayerState depending if it is for all players or only one

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Or you can handle it with a manager put in the scene too
It depends of your game

real yacht May 2, 2019, 8:38 AM

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one more question, DLC support and loading assets on fly 😃 any guidline for this... is it possible to fetch DLC from server and apply update on game start? android / ios and other platforms

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any document about this..etc

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and also, is mounting pak supported on android and ios platform?

cunning stirrup May 2, 2019, 8:45 AM

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Spawning actors in multiplayer via cpp on the server doesn't replicate their location on the clients, where as spawning them from BP does -- can anyone confirm that, or find a workaround ?

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bReplicateMovement and bReplicates are true, location of the spawn on the clients is always world origin

drifting plank May 2, 2019, 9:17 AM

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Maybe they are not relevant due to the distance ?

cunning stirrup May 2, 2019, 9:17 AM

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they are relevant and seen by the client

drifting plank May 2, 2019, 9:17 AM

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Are you sure that you spawn the actor on the server ?

cunning stirrup May 2, 2019, 9:18 AM

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yes

drifting plank May 2, 2019, 9:20 AM

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I didn't have any issue with my c++ spawn on my side

cunning stirrup May 2, 2019, 9:21 AM

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I'm trying to recreate the issue on a brand new project but it doesn't seem to be there

drifting plank May 2, 2019, 9:21 AM

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Anyone has already encountered this error and succeed to solve it ?
CreateNamedDriver failed to create a driver from the definition BeaconNetDriver

I have this in my DefaultEngine.ini

[OnlineSubsystem]
DefaultPlatformService=Null

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

[/Script/OnlineSubsystemUtils.OnlineBeaconHost]
ListenPort=7787
BeaconConnectionInitialTimeout=48.0
BeaconConnectionTimeout=49.0

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And all tutorials use the Steam drivers but I didn't want to use Steam!

cunning stirrup May 2, 2019, 9:25 AM

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[OnlineSubsystem]
DefaultPlatformService=Null

is not needed as it already defaults to NULL

drifting plank May 2, 2019, 9:25 AM

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Ok good to know

cunning stirrup May 2, 2019, 9:26 AM

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(you can see that in the log)

drifting plank May 2, 2019, 9:27 AM

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So you are wrong beacause it doesn't work :O

📎 unknown.png

cunning stirrup May 2, 2019, 9:27 AM

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new project doesn't have that line and multiplayer still works

drifting plank May 2, 2019, 9:28 AM

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yeah it was my line ClearArray I think

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But I still don't find how to setup the beacon :/

cunning stirrup May 2, 2019, 9:30 AM

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idk

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seems spawning cpp from cpp doesn't replicate the location

drifting plank May 2, 2019, 9:31 AM

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That's strange 🤔

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It works for me for my grenades

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Check the template of FPS in c++

cunning stirrup May 2, 2019, 9:34 AM

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🤔

drifting plank May 2, 2019, 9:38 AM

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It spawns a projectile from c++ and it is replicated

cunning stirrup May 2, 2019, 9:43 AM

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i'm not able to find steps to reproduce the issue

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I've found it

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If you call Spawned->AttachToActor(GetOwner(), FAttachmentTransformRules(EAttachmentRule::KeepWorld, false)); then there is a desync

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@drifting plank

flint plaza May 2, 2019, 10:08 AM

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Hey guys. I am integrating a plugin originally built for single player into my project. Functionality is working good so far for multiplayer but the UI isn't.
The UI for the plugin is managed by the HUD class which has to be set in the game mode.
The problem that I seem to think is, the UI for all the players gets spawned on to the server window. So if 3 players are playing, everyone's UI is drawn on to the server instance window. Note, this is tested via playing in editor

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How can I fix this?

cunning stirrup May 2, 2019, 10:11 AM

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add a IsLocallyControlled before spawning the HUD @flint plaza

drifting plank May 2, 2019, 10:13 AM

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Logically PlayerHUD exists only on client

cunning stirrup May 2, 2019, 10:13 AM

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apprently it doesn't

flint plaza May 2, 2019, 10:14 AM

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I actually don't spawn the HUD anywhere

rose egret May 2, 2019, 10:32 AM

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is it possible to launch Stanalone game as server? what the command line?

thin stratus May 2, 2019, 10:36 AM

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What's the C++ version of HandleNetworkError and HandleTravelError?

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FGameDelegates::Get().GetHandleDisconnectDelegate().Broadcast(InWorld, NetDriver); 🤔

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Ah OnTravelFailure().AddUObject(this, &UEngine::HandleTravelFailure); OnNetworkFailure().AddUObject(this, &UEngine::HandleNetworkFailure);

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Found it

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(Part of UnrealEngine class)

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// Listen to network failures
if (GetEngine())
{
    GetEngine()->OnTravelFailure().AddUObject(this, &UHLGameInstance::HandleTravelFailure);
    GetEngine()->OnNetworkFailure().AddUObject(this, &UHLGameInstance::HandleNetworkFailure);
}

void HandleTravelFailure(UWorld* World, ETravelFailure::Type FailureType, const FString& ErrorString);
void HandleNetworkFailure(UWorld* World, UNetDriver* NetDriver, ENetworkFailure::Type FailureType, const FString& ErrorString);

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Just in case someone has the same question /shrug

thin stratus May 2, 2019, 11:18 AM

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Soooo, at which point is passing data via "ClientTravel" Options "too much"? :D

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For Splitscreen we save customizations locally.
For Online we save them on the backend.
For LAN we have nothing to save them at, despite sending them on connecting.

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Now we talk about 12 names, maybe even time 4 for splitscreen LAN:

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That would be a maximum of 48 values with each having a key and value.

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What better options do I have?

winged badger May 2, 2019, 11:21 AM

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what are you trying to do?

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is your travel seamless?

thin stratus May 2, 2019, 11:24 AM

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Nope, initial connection

winged badger May 2, 2019, 11:24 AM

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and even if its not, you can send them via PlayerState / CopyProperties / RPC to server when required

thin stratus May 2, 2019, 11:25 AM

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Yeah I know about that path, however I like the option to pass it on connection somehow

winged badger May 2, 2019, 11:26 AM

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what kind/amount of data?

thin stratus May 2, 2019, 11:27 AM

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Now we talk about 12 names, maybe even times 4 for splitscreen LAN:
That would be a maximum of 48 values with each having a key and value.

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Just Strings if that matters

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Not sure if I could format them as a json string when passing them

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But that's just details

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The connection url with 96 values might be a bit too long, idk

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it's only for lan games though

winged badger May 2, 2019, 11:30 AM

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i really dislike sending something that large in one shot

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if its per player, then using PS does save you the trouble of sending keys

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and doesn't do it all at the same time

rough iron May 2, 2019, 11:40 AM

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I would not send that much through the options

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you could be better of creating your own initial handshake afterwards with replication

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in any case if your HAVE to pass that info on the connection your can always pass a compressed string

drifting plank May 2, 2019, 12:03 PM

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@rose egret In the editor, you have a server if you set the number of players to 2 or you check "Run Dedicated server"

thin stratus May 2, 2019, 12:05 PM

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@winged badger @rough iron I really only need this for LAN. Online uses a PlayerID and is all sorted.
The problem with the PS RPC is that this is currently all setup to access the data after Login, not later (PS doesn't exist that early for replication I assume).
My own handshake is probably a bit too much, as I'm not familiar with where to even start in ue4 for that.

winged badger May 2, 2019, 12:07 PM

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no, PS is created during PostLogin

rough iron May 2, 2019, 12:10 PM

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Yep after PostLogin you are good to start replication

thin stratus May 2, 2019, 12:28 PM

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Correct, however the initial stuff happens on Login atm, not PostLogin.
Guess I have to hack something together for LAN -.-

rancid lotus May 2, 2019, 1:16 PM

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pretty basic question, but I am using the multiplayer ALS demo, and I tried creating a variant of the player character, however the second player does not control it at all. What did I mess up in this process?

📎 unknown.png

rose egret May 2, 2019, 1:16 PM

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can we build a dedicated server from the compiled version of engine? or it need to be compiled from source?

thin stratus May 2, 2019, 1:21 PM

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Source

rose egret May 2, 2019, 1:37 PM

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@thin stratus the source version I compiled can't package the project.
is anyone using UE 4.22 with VS 2019?

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I feel like UE doesn't support VS2019 . its crap

thin stratus May 2, 2019, 1:41 PM

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Not using 4.22 yet

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Neither VS 2019

winged badger May 2, 2019, 1:42 PM

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i generally wait 6-9 months to upgrade VS

thin stratus May 2, 2019, 1:42 PM

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Hm, what's the most straight forward way to check if a game is LAN or Online?

winged badger May 2, 2019, 1:42 PM

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microsoft rarely releases anything without a few kinks in it

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doesn't session have that information?

thin stratus May 2, 2019, 1:43 PM

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Good idea and question. Lemme check.

rough iron May 2, 2019, 1:56 PM

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Yep the session should have it, if not add it xD

north swan May 2, 2019, 2:52 PM

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Hi guys,
does PlayerState->UniqueId behave differently in LAN games? (using UWorks steam integration)

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it doesn't seem to persist through reconnects

thin stratus May 2, 2019, 3:29 PM

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When connecting to a Server, shouldn't the Client at some point call "ReceivedPlayer"?

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Okay it does but the PlayerState isn't valid at that point

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.>

fallow orbit May 2, 2019, 6:15 PM

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whats the most efficent way to get data to travel through levels?
I want players to be able to select their team and then thats assigned on spawn in the new level

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I'm using blueprint so Seamless Travel isn't viable i don't believe

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instances seem to only store information of the main client

drifting plank May 2, 2019, 6:40 PM

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Hey !
I have succeed to use the TestBeaconClient and TestBeaconHost with session.
Now I am trying to use the LobbyBeacon but I have this error :
IpConnection_0: Join failure, Couldn't spawn beacon.

I have debug the code of OnlineBeaconHost.cpp (lines 163-168 of UE4.21) and it seems that is due to the variable NewClientActor which still null :

FOnBeaconSpawned* OnBeaconSpawnedDelegate = OnBeaconSpawnedMapping.Find(BeaconType);
                            if (OnBeaconSpawnedDelegate && OnBeaconSpawnedDelegate->IsBound())
                            {
                                NewClientActor = OnBeaconSpawnedDelegate->Execute(Connection);
                            }

                            if (NewClientActor && BeaconType == NewClientActor->GetBeaconType())

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Hum i progress, I found that my UniqueID is INVALID. Any idea why ?

stoic acorn May 2, 2019, 6:56 PM

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If you were to create an online AND a LAN version of the same game, would it require an immense amount of work?

drifting plank May 2, 2019, 6:57 PM

#

If you do Online, the lan version will works no ?

thin stratus May 2, 2019, 6:59 PM

#

Technically online and LAN is the same.

#

It's a connection to a different PC.

#

So the Gameplay part should work.

drifting plank May 2, 2019, 7:42 PM

#

Ok so it works, I have found why. I do the "Init" after the registering of the host. :(
There was a comment // beacon->Init() and I didn't see it 😦

#

The last issue that I have is that I didn't have a valid UniqueId.
Any idea why ?

past rain May 2, 2019, 7:47 PM

#

Should collision events run on the server only? For example the OnActorBeginOverlap, should the function be wrapped inside an authority check?

stoic acorn May 2, 2019, 8:06 PM

#

Ok thanks again @thin stratus I guess the biggest difference would be between couch co-op and online/LAN

drifting plank May 2, 2019, 8:08 PM

#

Oh yeah this type of multiplayer sure !

drifting plank May 2, 2019, 8:32 PM

#

Hey @slate veldt Did you write any documentation about the lobby system ?
I didn't succeed to include any LobbyBeacon files. I have seen that you had the issue before but I didn't find your solution.

#

Can you help me please ?

#

slate veldt May 2, 2019, 8:52 PM

#

Ah damn, I never got around to it in the end - on the particular project I was on I got asked to shelve the lobby beacon stuff (well, the bits I hadn't done yet) and move onto other stuff.

For that particular error you have, you need to add a module to your include paths...

"Lobby"

#

Do you know how to do that or do you want a quick how to guide?

#

@drifting plank

#

Also make sure to at me so I get the notification

drifting plank May 2, 2019, 9:27 PM

#

Hey thanks for the reply
First I tried to update the Build.cs of my project to add this PublicDynamicDependencies "Lobby"

Then I tried to include the .h in the required file but the compilaion doesn't work and shows me the error above.

I'm back to home so it's complicated to show you but I will contact you back tommorow if you can

#

@slate veldt

slate veldt May 2, 2019, 9:40 PM

#

@drifting plank

I think you really want it in your PublicDependencyModuleNames not the PublicDynamicDependencies.

Example below...

PublicDependencyModuleNames.AddRange(new string[] { "AIModule", "Core", "CoreUObject", "Engine", "InputCore", "HeadMountedDisplay", "Lobby", "NavigationSystem", "UMG" });

#

As a tip, anytime you're looking through engine code, always take a look at the API before the class. For example, LobbyBeaconClient has LOBBY_API before it, this means that if you want to use that file in your project, you'll need to add the pre-API wording to your PublicDependencyModuleNames list

drifting plank May 2, 2019, 9:41 PM

#

Yes but when I tried that. The engine can't start because the UE4Editor-lobby.dll is missing

#

Oh yeah I noticed that, thanks !

slate veldt May 2, 2019, 9:42 PM

#

Hmm, let me take a look at the code for the old project I was working on....

drifting plank May 2, 2019, 9:43 PM

#

Sure !

slate veldt May 2, 2019, 9:44 PM

#

Ahhhhh @drifting plank I remember now. Lobby API is actually part of a larger module PLUGIN (not engine code) called "OnlineFramework" - try that next time you're able to like so.

{
"OnlineFramework"
});```

That just goes in your build.cs file like before

drifting plank May 2, 2019, 9:45 PM

#

Oh thanks =)

slate veldt May 2, 2019, 9:45 PM

#

Sorry, totally forgot that it was a plugin until I opened up the old project's Target.cs file lmao

Drop me a mention tomorrow in this channel to let me know if it works or not

drifting plank May 2, 2019, 9:46 PM

#

Ok thanks for the help 😉

slate veldt May 2, 2019, 9:46 PM

#

Not a problem, fingers crossed ^_^

spring ore May 2, 2019, 9:59 PM

#

any idea why this spawns the new player but doesnt give it the controller?

📎 brokenRespawn.PNG

drifting plank May 2, 2019, 10:32 PM

#

Why did you call respawn at the end ?

#

Oh to rebind ok

#

Are you on the server when you use the Posses node ?

tall pine May 2, 2019, 10:35 PM

#

Hi guys,

Simple question: if I have a trigger, with a box collision, that can be triggered when a player steps into it and press a button. How do I go about deciding which characters to trigger the event for if there are multiple players inside the trigger zone?

Thanks!

spring ore May 2, 2019, 10:36 PM

#

I will have to check, honestly I am not sure what I'm doing

past rain May 2, 2019, 10:40 PM

#

@tall pine you could give a each player a tag name, similar to unities system. Then you could use the actor has tag function. Would that work for you?

past rain May 2, 2019, 11:05 PM

#

@spring ore did you get it working?

spring ore May 2, 2019, 11:13 PM

#

was on the road

#

just loading up now

tall pine May 2, 2019, 11:14 PM

#

@past rain : I'm not sure how that would work, since I've never done that before. It all boils down to reading input from multiple players.

So how do you read input from different players in the game?

spring ore May 2, 2019, 11:17 PM

#

@past rain @drifting plank the possess is only excuted on the server it seems

past rain May 2, 2019, 11:22 PM

#

@spring ore not sure if its possible not can you set the note to replicate in its settings?

#

@tall pine what kind of input?

tall pine May 2, 2019, 11:28 PM

#

So in my trigger BP I have an event that corresponds to FaceButtonBottom. When a player walks into the trigger, he can press FaceBottom and trigger the event.

Now in MP, the callback doesn't tell me which player trigger that event. Is there a way to find out?

past rain May 2, 2019, 11:29 PM

#

Sorry what's MP?

tall pine May 2, 2019, 11:29 PM

#

Multiplayer

past rain May 2, 2019, 11:29 PM

#

Ah okay so

#

You got access to all the players right?

#

Can't you tell the difference by name of the players for Example?

spring ore May 2, 2019, 11:31 PM

#

@past rain um what?

tall pine May 2, 2019, 11:31 PM

#

There is no info from the event to tell me who presses it. I can't upload an image here either, since the channel doesn't allow it. Otherwise you'll see what I mean

past rain May 2, 2019, 11:33 PM

#

Pm me the image

#

@spring ore google ue4 Possess multiplayer and look around for videos/threads

grand kestrel May 3, 2019, 5:54 AM

#

Anyone please confirm for me that CMC with Simulated Proxy in 4.22 has this issue (sliding after movement) - even occurs at 0 latency
https://streamable.com/d39gg

Streamable

pLXXobGkbt.mp4 - Streamable

▶ Play video

#

Engine bug for sure

#

Almost anyone on 4.22 should be able to reproduce this easily if they use ACharacter 😃

#

50% Found it. Enabling this feature prevents it happening, which means it revolves around a change they did to implement this https://i.imgur.com/aUeWMnB.png

Imgur

#

As expected it occurs in SimulateMovement() (CMC)

#

So.. yeah, this was an oversight on their part

#

Gonna bug report it

#

Its coz they put it in for Fortnite and didn't test without it 🤣

#

Not looking forward to dealing with Epic's bug report support though

#

🤦 It slides even with it on, just not nearly as bad

#

I thought it was low friction but the friction isn't low

desert breach May 3, 2019, 7:10 AM

#

guys need some guidance . Please tell me what does these logs indicate ?
LogHandshake: SendConnectChallenge. Timestamp: 39.918385, Cookie: 226228085209219088202019254000017215231148189223200193039013 LogNet: Verbose: NotifyAcceptingConnection: Server TestServer accept LogNet: NotifyAcceptingConnection accepted from: 192.168.1.2:59742 LogHandshake: SendConnectChallenge. Timestamp: 40.919239, Cookie: 240152120099208048061034062158161216044128050032009060151153 LogNet: Verbose: NotifyAcceptingConnection: Server TestServer accept LogNet: NotifyAcceptingConnection accepted from: 192.168.1.2:42187 LogHandshake: SendConnectChallenge. Timestamp: 41.367260, Cookie: 236047221057173219106134244139062144055229127059194186233202 LogNet: Verbose: NotifyAcceptingConnection: Server TestServer accept LogNet: NotifyAcceptingConnection accepted from: 192.168.1.2:42187 LogHandshake: SendConnectChallenge. Timestamp: 42.368782, Cookie: 176201224204180011188246054146229253147123155182035240091152 LogNet: Verbose: NotifyAcceptingConnection: Server TestServer accept LogNet: NotifyAcceptingConnection accepted from: 192.168.1.2:42187 LogHandshake: SendConnectChallenge. Timestamp: 43.376808, Cookie: 235225105222115127213115048229008010149118085161045201136220 LogNet: Verbose: NotifyAcceptingConnection: Server TestServer accept LogNet: NotifyAcceptingConnection accepted from: 192.168.1.2:42187

#

My server is working fine but when I ask a android client to connect it shows me this

#

I do this to connect for now. Its a direct ip connection. GetWorld()->GetFirstPlayerController()->ClientTravel("192.168.1.5:7777",ETravelType::TRAVEL_Absolute);

drifting plank May 3, 2019, 8:10 AM

#

Hey @slate veldt I checked the page https://docs.unrealengine.com/en-us/Programming/BuildTools/UnrealBuildTool/ModuleFiles
And I didn't find the variable AdditionalPlugins
So I will search which one to use !

desert breach May 3, 2019, 8:48 AM

#

guys any help ?

drifting plank May 3, 2019, 8:52 AM

#

It just accepts the connection for your client but did you do your logic in tick to have all these lines ?

#

Normally you have only the Send then the Notify once

desert breach May 3, 2019, 9:46 AM

#

I just added the logic of ClientTravel Method

#

But in my client (Oculus GO) server level is not loaded

#

And these log messages I'm getting on server side

slate veldt May 3, 2019, 10:05 AM

#

@drifting plank Ah damn, my fault again (was tired last night)

This is in Target.cs not Build.cs

        {
            "OnlineFramework"
        });```

drifting plank May 3, 2019, 10:06 AM

#

Oh thanks ! 😃

slate veldt May 3, 2019, 10:06 AM

#

I've just checked build.cs and I can't see anything out the ordinary - just standard multiplayer stuff like "Networking", "OnlineSubsystem", and "OnlineSubsystemUtils" in PublicDependencyModuleNames and "OnlineSubsystemSteam" in DynamicallyLoadedModuleNames

past bear May 3, 2019, 10:32 AM

#

hmm, if I add a component in BP, does this only happen on the server?

#

looks like this is indeed the case

flint plaza May 3, 2019, 10:39 AM

#

Question:- when I fetch tags from the overlapped actor, the correct tags are returned in the server window but the default value of the tags is returned for the client version. Any idea why?

past bear May 3, 2019, 10:42 AM

#

variable may well not be replicated

winged badger May 3, 2019, 10:52 AM

#

if you add it in runtime, you'll need to call SetReplicates(true)

#

for it to spawn client side

#

@flint plaza actor/component tags don't replicate by default

#

look into GameplayTags for that

flint plaza May 3, 2019, 10:56 AM

#

awesome! Replicating it worked!

fleet raven May 3, 2019, 10:59 AM

#

@grand kestrel what's the issue exactly? how it slides forward for one frame when you stop moving?

chrome bay May 3, 2019, 11:21 AM

#

@jolly siren sorry I'm not on 4.22 yet with a project that has travelling!

#

But that does look frustrating

#

@past bear if it's a replicated component IIRC the client will create the component as well

past bear May 3, 2019, 11:22 AM

#

apparently that's not the case

#

which I expected it to be

#

bit shit, tbh

chrome bay May 3, 2019, 11:22 AM

#

Yeah that sounds like a bug to me then.. a few of my projects rely on that

#

Though I'm creating in code not BP, but still

#

Is the CDO of the component replicated?

past bear May 3, 2019, 11:23 AM

#

adding a component is adding a component :/

#

no idea, it's a blueprint class

chrome bay May 3, 2019, 11:23 AM

#

Hmm.. yeah that definitely should be working

#

I used to have weapons which were actor components and spawned them server-side

#

The base class for those was replicated, but otherwise I don't think I had to do anything special for that

winged badger May 3, 2019, 11:37 AM

#

if the component is on the replicated Actor CDO, or an Actor loaded from package, doesn't matter if its replicated or not, it gets created

#

if its added at runtime, calling SetReplicates() on it is the only way to get it client side, apart from adding it locally - but then you wouldn't be able to reference it over network

#

one recent version of unreal did have a bug with that iirc

#

but i don't recall which one

#

4.21 i think

chrome bay May 3, 2019, 11:45 AM

#

Yeah I think that was with Static Mesh Components, I seem to remember there being some issue around it.

#

But that may not have been with component creation directly.

#

I've not tried spawning a component then replicating it after it's spawned, but if the CDO is marked as replicated it should definitely work.

flint plaza May 3, 2019, 11:55 AM

#

Question: I have 2 variable sets. I for the owner and one for the server side. I cycle through available weapons by first changing the local variable (whose variable affects the local HUD) and then call RPC to change value of the server variable. Why does the change in local variable reflect on the server HUD as well?

chrome bay May 3, 2019, 12:12 PM

#

Why would you have two different sets of variables? That sounds extremely prone to error already

#

Server should maintain a list of weapons that the player has, which rep's to clients. When a client wants to change weapon they ask the Server to do it. Server changes a single weapon pointer value, and client switches to that weapon when they receive the change.

drifting plank May 3, 2019, 12:14 PM

#

It works with the dependency added in my Target.cs but the code can't compile due to an another error
@slate veldt Any idea why the code of LobbyBeaconClient has an error ?

2>C:\UE_4.21\Engine\Plugins\Online\OnlineFramework\Source\Lobby\Public\LobbyBeaconClient.h(57): error C2143: syntax error: missing ';' before '<class-head>'
2>C:\UE_4.21\Engine\Plugins\Online\OnlineFramework\Source\Lobby\Public\LobbyBeaconClient.h(57): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
2>C:\UE_4.21\Engine\Plugins\Online\OnlineFramework\Source\Lobby\Public\LobbyBeaconClient.h(59): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

chrome bay May 3, 2019, 12:15 PM

#

Open LobbyBeaconClient.h and see what API the class belongs to, then make sure you include it

#

class LOBBY_API ALobbyBeaconClient : public AOnlineBeaconClient

#

You need the 'Lobby' dependency

drifting plank May 3, 2019, 12:16 PM

#

I include it

chrome bay May 3, 2019, 12:16 PM

#

Include doesn't matter if the module isn't added as a dependency

drifting plank May 3, 2019, 12:16 PM

#

PublicDependencyModuleNames.AddRange(new string[] {
            "Core",
            "CoreUObject",
            "Engine",
            "InputCore",
            "UMG",
            "Json",
            "Networking",
            "OnlineSubsystem",
            "OnlineSubsystemUtils",
            "Lobby",
        });

        DynamicallyLoadedModuleNames.AddRange(new string[]
        {
            "OnlineSubsystemNull"
        });

slate veldt May 3, 2019, 12:17 PM

#

@chrome bay I'm not sure if you need to explicitly include Lobby as it's not an engine module - it's part of a plugin of the engine. Mine worked without it

#

It's handled rather strangely, because the engine doesn't recognise it as it's own module due to it being part of some larger module

chrome bay May 3, 2019, 12:17 PM

#

It depends if as another module might be including already too

drifting plank May 3, 2019, 12:17 PM

#

I put it in the public dependencies of my Build.cs and OnlineFramework for my different Target.cs

chrome bay May 3, 2019, 12:17 PM

#

Actually that error suggests the issue is in the LobbyBeaconClient.h file

#

Have you modified it?

drifting plank May 3, 2019, 12:18 PM

#

No

slate veldt May 3, 2019, 12:18 PM

#

Oh yeah, it looks like it's got compile errors

chrome bay May 3, 2019, 12:18 PM

#

syntax error: missing ';' before '<class-head>'

slate veldt May 3, 2019, 12:18 PM

#

what engine version you using?

drifting plank May 3, 2019, 12:18 PM

#

4.21.2

slate veldt May 3, 2019, 12:18 PM

#

Yeah, that's what I used to use on the old project I believe... let me check

chrome bay May 3, 2019, 12:19 PM

#

Is there a ; after the enum declared above it?

drifting plank May 3, 2019, 12:19 PM

#

Yes !

chrome bay May 3, 2019, 12:19 PM

#

post a screen of that file

slate veldt May 3, 2019, 12:19 PM

#

Ah no, I used 4.20 - I'll check the source file in 4.21 for lobbybeaconclient

drifting plank May 3, 2019, 12:19 PM

#

I will post a pastebin 😉

#

Here it is https://pastebin.com/K129Ujq3

Pastebin

chrome bay May 3, 2019, 12:21 PM

#

Okay so

#

AOnlineBeaconClient belongs to ONLINESUBSYSTEMUTILS

#

But you have that too.. oh christ knows

flint plaza May 3, 2019, 12:22 PM

#

I had 2 sets because of local implementation for the client which the server replicates to everyone but the owner

drifting plank May 3, 2019, 12:22 PM

#

Yes it was for the session

chrome bay May 3, 2019, 12:22 PM

#

Oh it's a plugin right?

drifting plank May 3, 2019, 12:22 PM

#

It's a plugin of Ue4 yes

chrome bay May 3, 2019, 12:22 PM

#

In the .uplugin file, add the plugin dependencies too. Just as an example:

        {
            "Name": "OnlineSubsystem",
            "Enabled": true
        }
    ]```

#

Don't ask me why Epic thought that was a good idea

drifting plank May 3, 2019, 12:23 PM

#

"Name": "OnlineFramework",
"Enabled": true

It seems good to me

chrome bay May 3, 2019, 12:24 PM

#

that's the only issue I can think of now

#

it doesn't seem to know what AOnlineBeaconClient is

drifting plank May 3, 2019, 12:25 PM

#

I will do a custom one then ..

chrome bay May 3, 2019, 12:25 PM

#

OnlineFramework isn't OnlineSubsystem

#

Since they made all the engine modules plugins it's become a pain in the arse

drifting plank May 3, 2019, 12:26 PM

#

I have that in my module so it seems good too but I will check if I miss other plugins :

"Modules": [
        {
            "Name": "Blackhive",
            "Type": "Runtime",
            "LoadingPhase": "Default",
            "AdditionalDependencies": [
                "Engine",
                "OnlineSubsystemUtils"
            ]
        }
    ],

slate veldt May 3, 2019, 12:26 PM

#

Does your project have

"OnlineSubsystem",
"OnlineSubsystemUtils"
}```

Might be why it cannot compile if you don't have the online subsystem utils module in your actual game project

drifting plank May 3, 2019, 12:26 PM

#

Yes I have

slate veldt May 3, 2019, 12:26 PM

#

Hmmm

drifting plank May 3, 2019, 12:28 PM

#

I post it before

slate veldt May 3, 2019, 12:29 PM

#

Yeah, wasn't sure if you'd changed it whilst working today 😛

drifting plank May 3, 2019, 12:29 PM

#

I will check if the current version of my file has not been modified

slate veldt May 3, 2019, 12:30 PM

#

How about your project's .uplugin?

Does it include:

    {
            "Name": "OnlineSubsystem",
            "Enabled": true
        },
        {
            "Name": "OnlineSubsystemUtils",
            "Enabled": true
        },
        {
            "Name": "OnlineFramework",
            "Enabled": true
        }
]```

#

Ohhhh....

I've just found yet another thing - sorry

Looks like I've also got this in the .uplugin

        {
            "Name": "ProjectName",
            "Type": "Runtime",
            "LoadingPhase": "Default",
            "AdditionalDependencies": [
                "Engine",
                "Lobby"
            ]
        }
    ],```

drifting plank May 3, 2019, 12:32 PM

#

Oh !

#

For me I have OnlineSubsystemUtils in the additionalDependencies but I can't find OnlineSubsystem and OnlineSubsystemUtils in the plugins section

slate veldt May 3, 2019, 12:35 PM

#

So it's some strange hierarchy.

Looks like you need to include the plugin as a plugin in the uproject file (the online framework bit, online subsystem and online subsystem utils), and then also include the specific API name as a additional dependency module in there above it.

and then also in your Build.cs add your "OnlineSubsystem" "OnlineSubsystemUtils" as PublicDependencyModuleNames.

And then in your Target.cs add the bit I mentioned yesterday

        {
            "OnlineFramework"
        });```

#

Try implementing all of those at once and then compile 😉

drifting plank May 3, 2019, 12:39 PM

#

Ok I probably modify the Lobby file, don't know how and when ? 🤔

#

I recover it here : https://github.com/EpicGames/UnrealEngine/blob/4.21/Engine/Plugins/Online/OnlineFramework/Source/Lobby/Public/LobbyBeaconClient.h

#

It compiles now !

#

Thanks for the help @slate veldt and @chrome bay

slate veldt May 3, 2019, 12:52 PM

#

Oh perfect 😃 No problem!

thin stratus May 3, 2019, 12:55 PM

#

I wonder if TMaps will ever be replicated...

#

Is there any Key,Value container that properly replicates?

bitter oriole May 3, 2019, 1:02 PM

#

Nah

#

If you really need key value with keys that aren't static, you'll need to reimplement it

#

Basically a RPC multicast to add & delete

drifting plank May 3, 2019, 1:03 PM

#

Where can I override the different parameter like "NAME_BeaconPort" ?

#

Do I need to change the source engine directly ? Or can I use the config file ?
I have already these lines to override the port but it seems that the NAME_BeaconPort is 15000 and I don't know how to change it :

[/Script/OnlineSubsystemUtils.OnlineBeaconHost]
ListenPort=7787

#

Oh I found it is in OnlineSessionSettings
It's strange that even with the config file, the port is not override here 😦

slate veldt May 3, 2019, 1:29 PM

#

@thin stratus Best solution I've seen for replicating TMaps is writing a replicator function that replicates 2 TArrays - one for keys and one for values.

#

By replicator function, I don't mean an RPC, I'm on about whatever the function is that serializes a type before sending it over the network, and the function that reconstructs on the other end

thin stratus May 3, 2019, 1:31 PM

#

So basically a struct that has a custom NetSerialize function

#

That sounds like the dirtiest yet cleanest way

#

I'm just replicating single values now and keep the majority of map entries server side

slate veldt May 3, 2019, 1:32 PM

#

That's the one - sorry been a while since I've written network code!

Yeah, it's a horrible solution, but it works from what I hear.... I potentially even used it myself but I can't really remember now

Yeah that seems like a sound idea

thin stratus May 3, 2019, 1:32 PM

#

I have a component that keeps track of a lot of stats server side

#

TMap<FName,FHLStat*>

#

However that sadly can't easily be replicated

#

So I now keep it like that and additionally replicate and store specific stats in the PlayerState for showing them to the UI

#

The TMap is more for backend stat tracking

#

Would be convient if I could replicate that easily but well

slate veldt May 3, 2019, 1:33 PM

#

Haha yeah, I mean Sweeney himself said he's been meaning to add replication for TMaps since the 90s, since UE1 I think!

#

So it's either going to happen at some indeterminate point in the future, or never at all because it's become a running joke

unborn nimbus May 3, 2019, 1:35 PM

#

Anyone familiar with how to fix LogNet: Warning: Incoming ip address doesn't match expected server address: Actual: 0.0.0.0:0 Expected: 127.0.0.1:7777 or LogWorld:Warning: SetActiveLevelCollection attempted to use an out of date NetDriver: GameNetDriver?

slate veldt May 3, 2019, 1:37 PM

#

Ah potentially, I remember having that issue a long time ago. Judging from the error itself, have you ensured that both your server and client are running the same compiled version?

unborn nimbus May 3, 2019, 1:37 PM

#

Yea, I'm just trying to run in editor

slate veldt May 3, 2019, 1:37 PM

#

Hmm, are you trying to run seamless travel or absolute?

unborn nimbus May 3, 2019, 1:37 PM

#

absolute

#

just using the OpenLevel node

#

with localhost ip

slate veldt May 3, 2019, 1:42 PM

#

Yeah, sounds like you know Seamless doesn't work in editor 😉

Unfortuantely I cannot remember how I resolved this issue (it was about 14 months ago now!) Hopefully someone else might though - perhaps try right clicking the uproject and launching game and see if you get the same error to check it's not editor specific

unborn nimbus May 3, 2019, 1:42 PM

#

It was working fine a few weeks ago then now it's not

#

so I created a fresh project and same error

#

I'm not sure what else to try since the project is literally empty

#

When I launch, I don't get the out of date warning, just the ip address warning

worthy wasp May 3, 2019, 4:24 PM

#

Would this error line be because i have different engine versions? I'm losing connection when the client connects to server (P2P) - and these remote clients are using BINARY version of UE4 - with compiled binaries from my server (that is on 4.21 source)

LogNet: NotifyControlMessage: Client connecting with invalid version. LocalNetworkVersion: -768981307, RemoteNetworkVersion: 594563605

glacial pollen May 3, 2019, 4:37 PM

#

I'm trying to create a demo project for the community, but I haven't started from scratch in three years, and I'm having issues I don't remember ever having:
I'm using the default 3rd person project, 4.20
In the game mode : I set the default pawn to none.
I override "Handle starting player" and spawn my own character in, (default 3rd person character), using the player PC as the owner, and then possess it

When I do this the character looses it's mind, its like it's trying to jump (even with EVERY node disconnected in the character BP), and twitches mid air. ALSO the character is distorted from the front/back. I tested with a square cause and it looks like a triangle!!!

What the hell am I forgetting to override?

glacial pollen May 3, 2019, 5:01 PM

#

ugh

📎 unknown.png

#

default for the 3rd person project, player start, don't use the transform as-is,
not only did this distort the character (duh) but it caused the weird player glitching/jumping/floating issue....

unborn nimbus May 3, 2019, 5:02 PM

#

Is there a trick to tracing where RPCs are coming from while debugging?

glacial pollen May 3, 2019, 5:07 PM

#

Where they came FROM? yea, use an input, of OBJECT, and print string

#

📎 unknown.png

slim holly May 3, 2019, 5:25 PM

#

alltho the reference will be a local copy

#

as the engine solves it automatically

cunning stirrup May 3, 2019, 6:32 PM

#

I'm trying to spawn an actor on the server so that it gets replicated, then send a reference to a client that asked for the actor to spawn via RPC.
Problem is that when I do that, most of the time the client gets the RPC before the actor gets replicated, resulting in a null reference on the client.
So how can I do that correctly ?

Only reference type accepted is direct pointers for RPC, i've tried with weak pointer and it won't let me.

#

even though internally it's weak pointers

winged badger May 3, 2019, 7:06 PM

#

Reference to new actor set server side. Replicated. Use OnRep for your logic.

glacial pollen May 3, 2019, 7:23 PM

#

@cunning stirrup on beginplay of the client side of the spawned actor, you can call another function that's sets the reference

cunning stirrup May 3, 2019, 7:24 PM

#

ended up doing with OnRep

glacial pollen May 3, 2019, 7:24 PM

#

This does not take seamless travel into account

#

It's fine, just an alternative

cunning stirrup May 3, 2019, 7:25 PM

#

that alternative is much easier to do in BP

glacial pollen May 3, 2019, 7:25 PM

#

Another way is to ab-use attachments

cunning stirrup May 3, 2019, 7:25 PM

#

but not in cpp

drifting plank May 3, 2019, 7:25 PM

#

@slate veldt Hey Do I need to join the session manually after that the player has called the function "JoiningServer".
Then he has recieve the event "OnJoiningGameAck".

glacial pollen May 3, 2019, 7:26 PM

#

Can you re-word that?

drifting plank May 3, 2019, 7:26 PM

#

Me ?

glacial pollen May 3, 2019, 7:26 PM

#

Yes please

#

There should be events/delegates that are fired after joining the session

drifting plank May 3, 2019, 7:28 PM

#

No it's when I used the Lobby module 😉

glacial pollen May 3, 2019, 7:28 PM

#

You could break point those two functions you listed and see which fires first

drifting plank May 3, 2019, 7:28 PM

#

It's why I ask to AgentMilkShake

glacial pollen May 3, 2019, 7:29 PM

#

I don't understand, the engine has built in events for successfully joining a session

drifting plank May 3, 2019, 7:29 PM

#

Yeah

#

But I'm currently implementing the Lobby in the OnlineFramework module.
And the lobby has a specific logic which permit to reserve a slot.
But I didn't see any "JoinSession" in the code

glacial pollen May 3, 2019, 7:32 PM

#

Hmm, interesting, of course I'm guessing, what if you did a search for sessions and joined it, the lobby would decide if you belong to the reserved slot. This would be something like OnPreLogin of the gamemode

drifting plank May 3, 2019, 7:32 PM

#

/** @return delegate fired when the server acknowledges the client request to join the server */
    FOnJoiningGame& OnJoiningGameAck() { return JoiningGameAck; }

It seems that I need to join the session manually ^^

glacial pollen May 3, 2019, 7:33 PM

#

Yes, only the pie/editor does "auto connect" if you setup the settings for that

#

But it's only good for in editor testing

#

As soon as you go standalone/packaged you have to manually find and join a session

slate veldt May 3, 2019, 7:34 PM

#

@drifting plank Hey, sorry I was away from the PC - what 2 functions were you wondering fire in which order? OnJoiningGameAck and what?

#

JoiningServer?

drifting plank May 3, 2019, 7:39 PM

#

No I was just wondering If I needed to join the session manually at the moment the server sends his ack

#

But it seems that it is the aim of the Ack

slate veldt May 3, 2019, 7:46 PM

#

Yeah, so Lobby beacons are essentially you joining the session without fully travelling. So if the player is successfully joining, the host will then (once your criteria for min player etc is met) start up the game on the server (travel from main menu to main map for example).

It's been a long while since I've actually looked at all this, but once your client is in, they should be able to access the list of players in the session (via lobby beacon client) and so you can populate UI for example.
You'll also be able to replicate the lobby state across for showing the host's selected map, game mode etc from UI in the main menu. Once you hit start on host, it will then drag all of them into the new level/game mode that the host has setup.

Give me a few minutes to remind myself

#

So Lobby Beacon Player State - each player should have 1 and it's replicated to all players connected I believe. This is where you store the user display name

#

Lobby beacon state - similar to a game state or player state, this holds the state of the lobby such as who is party leader, max players, waiting for all players to start etc.

drifting plank May 3, 2019, 7:51 PM

#

Yeah I understand that I took a lot of time to check the entire code ^^
But thanks for the clear explanation 😉

slate veldt May 3, 2019, 7:51 PM

#

No problem, I'm kinda jotting it all down both for you (in case you didn't know) and also for myself as a quick recap 😉

drifting plank May 3, 2019, 7:51 PM

#

I will also use it the beacon to select a character for the player and store the information on the server before the player really join.
So i need to store the net id and which character he has chosen.

slate veldt May 3, 2019, 7:53 PM

#

Yeah sounds like the best idea - I would store the character selection in the LobbyBeaconPlayerState

Because I cannot 100% remember, once you think a player has joined the lobby, kick off a new open level with ?listen - that should start a multiplayer game. That then potentially drags all of the connected players in too

drifting plank May 3, 2019, 7:54 PM

#

I already have a spawn manager which store the choice of the player. So i just need to handle it in my beacon host. And then load the choice once the player is connected on the map

slate veldt May 3, 2019, 7:56 PM

#

👍

tawny flicker May 4, 2019, 4:36 AM

#

📎 DrawCircle1.png

#

Hey guys. So i have this macro that Im adding onto a function

#

📎 DrawCircle3.png

#

📎 DrawCircle2.png

#

This is the Macro blueprint, and also the inputs and outputs of the macro

#

The first pic (The draw circle macro) in the function doesnt seem to have options for me to set the color and size? I mean, shouldnt there be like a button next to the color option that enables me to set it there?

#

also values to input in size?

#

yes i can plug them in, but shouldnt there be something there anyway?

#

Like a box next to the color option to set the linear color

#

Im following a tutorial, and this is what the tutors screen looks like

📎 Drawcircle4.png

#

Okay nvm, figured out the error lol

#

after staring at the screen for like half an hour blankly

#

I realized I ticked the pass by reference option for EVERY input

#

not just the Context

#

gg

urban dew May 4, 2019, 9:31 AM

#

does anyone know why servers would only appear in the same steam region?

#

if you host a server, people from different regions can't see?

thin stratus May 4, 2019, 9:44 AM

#

A ListenServer?

#

@urban dew

urban dew May 4, 2019, 9:45 AM

#

yes

thin stratus May 4, 2019, 9:46 AM

#

That's how Steam works

#

The Presence only gives you Servers around you and your friendlist.

urban dew May 4, 2019, 9:55 AM

#

ooh

#

is it different with the non standard appid?

#

so when steam gives me mine?

thin stratus May 4, 2019, 9:57 AM

#

Don't think so

naive crater May 4, 2019, 9:58 AM

#

the spacewars app id is region locked, but when you get your own it will be global. It does return servers geographically though so the closer servers will show up first.

urban dew May 4, 2019, 12:45 PM

#

glad to know, thanks so much guys 😃

grizzled stirrup May 4, 2019, 1:59 PM

#

Does anyone know if SetRemoteRoleForBackwardsCompat(ROLE_SimulatedProxy); is necessary to be included in the constructor of certain replicated actors?

#

ShooterGame does it with the projectile, weapon and pickup for example

#

The function definition says /** This function should only be used in the constructor of classes that need to set the RemoteRole for backwards compatibility purposes */

#

Does anyone know what these "Backwards Compatibility purposes" are?

past rain May 4, 2019, 2:18 PM

#

@grizzled stirrup why don't you look at the engine code and see what the function does?

grizzled stirrup May 4, 2019, 2:23 PM

#

@past rain I did, it simply sets RemoteRole

#

I just am curious if it is necessary, or if it's a legacy thing hence the "Backwards Compatibility" line

past rain May 4, 2019, 2:33 PM

#

All the threads I found regarding it was at least 4 years old, and I'm using projectile in my multiplayer game and having no problem with replication

#

Never seen that function

#

So my recommendation is to forget it exists

grizzled stirrup May 4, 2019, 2:34 PM

#

Perfect was hoping that's the case

#

Thanks!

wheat eagle May 4, 2019, 3:34 PM

#

Hello I have a question: I want to send to clients their steam avatars from the server. For that , I have an array of slate brushes where I keep players' avatars. The thing is that when the client recieves a slate brush from the array and adds it to the viewport, the resulting image is the default image of the array that Im presetting. In case of the server, it sees the image. Also, when testing with clients, I'm using Dedicated Server. Could it be that the dedicated server won't fire this Get Steam Friend Avatar correctly? Here is the bp

📎 unknown.png

winged badger May 4, 2019, 3:42 PM

#

dedicated server doesn't need steam client running

wheat eagle May 4, 2019, 3:43 PM

#

sorry, but I don't really understand. How is this rellevant?

urban dew May 4, 2019, 3:53 PM

#

I've just finished my first multiplayer test and came across a couple issues, for the host, everything worked perfectly, for the other players, they could do everything as well however no one else would see

#

im guessing this is due to improper replication?

solar stirrup May 4, 2019, 3:57 PM

#

So just making sure I'm not doing something stupid

#

is one actor per item in an inventory bad?

winged badger May 4, 2019, 3:58 PM

#

it gets expensive

solar stirrup May 4, 2019, 3:58 PM

#

What are the other solutions?

winged badger May 4, 2019, 3:58 PM

#

@urban dew clients have to RPC all input to the server

#

depends what kind of inventory are you using

solar stirrup May 4, 2019, 3:59 PM

#

Made my own, it contains FItemSlot

winged badger May 4, 2019, 3:59 PM

#

i mean

solar stirrup May 4, 2019, 3:59 PM

#

each slot references an actor, the actual item

urban dew May 4, 2019, 3:59 PM

#

📎 unknown.png

#

it's saying replicates to all if server

winged badger May 4, 2019, 3:59 PM

#

if your inventory requires visible meshes

urban dew May 4, 2019, 3:59 PM

#

it does replicate as host

solar stirrup May 4, 2019, 3:59 PM

#

oh no

#

not visible meshes unless they're equipped on you

winged badger May 4, 2019, 4:00 PM

#

BP or c++?

solar stirrup May 4, 2019, 4:00 PM

#

C++

urban dew May 4, 2019, 4:00 PM

#

how can I make it replicate to everyone regardlesss if they are server or not?

winged badger May 4, 2019, 4:02 PM

#

no obvious flaw in your screenshot

#

@solar stirrup your options are Actor, ActorComponent, UObject, or Struct

urban dew May 4, 2019, 4:03 PM

#

📎 unknown.png

solar stirrup May 4, 2019, 4:03 PM

#

Item data is already struct

urban dew May 4, 2019, 4:03 PM

#

📎 unknown.png

#

its saying it only replicates if it's the server

solar stirrup May 4, 2019, 4:03 PM

#

But you can't replicate structs right

winged badger May 4, 2019, 4:03 PM

#

as long as you have some kind of InventoryManager that can handle replication

urban dew May 4, 2019, 4:03 PM

#

it's on multicast already, but I want it to replicate to everyone?

solar stirrup May 4, 2019, 4:03 PM

#

so the inventory manages replication of structs? could work

#

each item has a unique item id

winged badger May 4, 2019, 4:04 PM

#

no, you can replicate structs just fine, any UPROPERTY on replicated struct will replicate

solar stirrup May 4, 2019, 4:04 PM

#

wait

#

really

#

I've been overthinking this like a fucking idiot (╯°□°）╯︵ ┻━┻

winged badger May 4, 2019, 4:04 PM

#

but its replication is atomic, which means the entire thing goes no matter how many properties changed

solar stirrup May 4, 2019, 4:04 PM

#

hmm

winged badger May 4, 2019, 4:04 PM

#

if your inventory has a potential to be huge

#

i suggest giving NetSerialization.h a read, its mostly comments

solar stirrup May 4, 2019, 4:05 PM

#

aight ty

#

how big would be too big

#

the replication is mostly place in inventory, durability (when it changes)

#

and for equipped items the current animation/state/etc

winged badger May 4, 2019, 4:05 PM

#

i'd be using FFastArraySerializer instead of an Array at 10-12 elements already

solar stirrup May 4, 2019, 4:06 PM

#

alright guess I need to read up more ^^

#

what types should I read up that would be useful here?

winged badger May 4, 2019, 4:06 PM

#

@urban dew if that SpawnShips spawns actual ships, and those are replicated actors

#

it should work just fine\

urban dew May 4, 2019, 4:06 PM

#

it does spawn ships, i've tested it in multiplayer listen server

#

the host spawns them fine

#

players spawn them

winged badger May 4, 2019, 4:07 PM

#

provided you did not plug something invalid into one of its pins

urban dew May 4, 2019, 4:07 PM

#

however no one can see the normal players ships

#

people can only see the hosts ships

winged badger May 4, 2019, 4:07 PM

#

what is normal player?

#

step 1, see if they are actually spawned

#

start a PIE game

#

switch the world outliner to client1

#

(illuminati eye bottom right has options for world you're viewing)

#

and see if those ships actually exist

#

or are they just sitting at say 0,0,0

urban dew May 4, 2019, 4:10 PM

#

won't work in editor for me i need to build the game

#

LogGameMode: Warning: CanServerTravel: Seamless travel currently NOT supported in single process PIE.

#

all players are normal

#

however one player hosts the server

winged badger May 4, 2019, 4:10 PM

#

then start multiprocess PIE

urban dew May 4, 2019, 4:10 PM

#

the spawning ships only works for them.

winged badger May 4, 2019, 4:10 PM

#

and play as client in editor

urban dew May 4, 2019, 4:10 PM

#

like, everything works perfectly, however, if the player isn't the host, other players can't see their stuff

winged badger May 4, 2019, 4:10 PM

#

uncheck use single process in advanced play settings

#

there are 3 scenarios here @urban dew

#

1 - stuff is there in the right place, but invisible

#

2 - stuff is there, but in the wrong place where you aren't looking

#

3 - stuff is not there at all

#

before fixing it you kinda need to know what are you fixing

urban dew May 4, 2019, 4:13 PM

#

how do i swap world outliner to cliebt 1

winged badger May 4, 2019, 4:13 PM

#

@solar stirrup the FFastArraySerializer gives you client side callbacks per item when it is Added, Removed or Changed

#

comes in very handy in situations like this

#

if you started multi process PIE as client

#

its already set to client

#

and can't be set to anything else

worthy perch May 4, 2019, 4:16 PM

#

I thought only the changed property(ies) of a struct get sent for replication.

winged badger May 4, 2019, 4:17 PM

#

nope

urban dew May 4, 2019, 4:17 PM

#

📎 unknown.png

#

@winged badger can confirm that it's not working

#

host is on the left

winged badger May 4, 2019, 4:17 PM

#

unless you write custom serialization for it

urban dew May 4, 2019, 4:17 PM

#

it cant see the ships

#

however is host spawns the ship

#

it works

#

so the issue is they aren't spawning at all

#

however, the client who spawns them can still see

#

but it doesn't register on server

winged badger May 4, 2019, 4:17 PM

#

then you didn't RPC them right

#

and you spawned them locally

urban dew May 4, 2019, 4:18 PM

#

📎 unknown.png

#

it's saying it replicates to all, if server

#

so i think that means it only spawns if it's the host.

winged badger May 4, 2019, 4:18 PM

#

and planet is in what relation to player controller?

urban dew May 4, 2019, 4:18 PM

#

planet is a bp actor in the world.

winged badger May 4, 2019, 4:18 PM

#

is it owned by the PC?

urban dew May 4, 2019, 4:19 PM

#

no it's not.

winged badger May 4, 2019, 4:19 PM

#

if not you either have to SetOwner of the planet to its PC on server

#

or

#

you move the RPC into PlayerController, which then calls a normal event on the Planet

urban dew May 4, 2019, 4:20 PM

#

move the rpc?

#

📎 unknown.png

#

this is the event in the planet

winged badger May 4, 2019, 4:20 PM

#

make server replicated event with same signature in the PlayerController

#

instead calling SpawnShips call that event

#

and from that event (red node) call SpawnShips on Planet referece

#

also, read your output, as its spamming you with "No owning connection for..." warnings whenever you try to spawn ships atm

urban dew May 4, 2019, 4:22 PM

#

do you mean that?

#

📎 unknown.png

winged badger May 4, 2019, 4:22 PM

#

almost

#

same signature

#

percent, faction, planetdestroyer

#

need all of that

#

then you connect wires that now go into Spawn Ships into Ship Spawn

#

and connect wires from red Ship Spawn node into SpawnShips

urban dew May 4, 2019, 4:24 PM

#

all errors where unrelated to the ship spawnins just checked.

#

1hmm

#

okay give me one second

winged badger May 4, 2019, 4:24 PM

#

they happen client side

#

those warnings

worthy perch May 4, 2019, 4:25 PM

#

Hmm, I remember I looked a bit for how struct replicate their properties, and all the responses (vaguely) said that only the changed properties are sent but they all reference this post: https://www.reddit.com/r/unrealengine/comments/3d1wfh/replication_of_structs_cant_get_a_confirmed_answer/cxhoobv/?utm_source=share&utm_medium=web2x

r/unrealengine - Replication of Structs, can't get a confirmed ans...

1 vote and 9 comments so far on Reddit

urban dew May 4, 2019, 4:27 PM

#

📎 unknown.png

#

zlo is this what you mean?

#

📎 unknown.png

#

because it still says it'll only spawn "if server"?

winged badger May 4, 2019, 4:40 PM

#

the event in planet doesn't have to be replicated now

#

but it doesn't really matter if it is or not

#

server RPC called from server is just a normal function/event

#

ah

#

problem tho

plain flume May 4, 2019, 4:40 PM

#

Hi! Is there a delegate or someway for actor to call function when something becomes network relevant?

winged badger May 4, 2019, 4:40 PM

#

the event in your controller needs to be Replicated to Server

#

and event in Planet can't be Multicast

urban dew May 4, 2019, 4:41 PM

#

i made the event in planet not replicate now

winged badger May 4, 2019, 4:41 PM

#

@plain flume server or client side?

urban dew May 4, 2019, 4:41 PM

#

📎 unknown.png

plain flume May 4, 2019, 4:41 PM

#

Server side

urban dew May 4, 2019, 4:42 PM

#

I really appreciate your help Zlo! 😃

winged badger May 4, 2019, 4:42 PM

#

now you need to make one in controller Server, not All

urban dew May 4, 2019, 4:42 PM

#

this is litterally the final thing stopping my game being ready for pre-alpha testing, replication not my strongpoint

winged badger May 4, 2019, 4:42 PM

#

network relevant to whom? as it is evaluated per PlayerController

urban dew May 4, 2019, 4:43 PM

#

how can I execute it on the server, is this what you mean zlo

#

📎 unknown.png

winged badger May 4, 2019, 4:43 PM

#

no, change ShipsSpawns to be Replicated to Server

plain flume May 4, 2019, 4:44 PM

#

I have an actor that I want to send some stuff for player from non replicated variable. Now I have a collision box that checks overlaps. I was wondering that if I can remove the collision box and use some delegate that launches when that actor becomes relevant to client player

winged badger May 4, 2019, 4:44 PM

#

otherwise your client will only spawn ships locally again, only the server spawning ships will spawn 2 sets on clients

urban dew May 4, 2019, 4:45 PM

#

📎 unknown.png

#

📎 unknown.png

#

so you think like this should work?

winged badger May 4, 2019, 4:45 PM

#

yes

urban dew May 4, 2019, 4:46 PM

#

ill give it a gander

winged badger May 4, 2019, 4:47 PM

#

clients handle their collisions separately

#

if you are using default net relevancy, you can continously check if the player is inside 15000 UU

#

which will be the same as becoming relevant

#

overriding IsNetRelevantFor and adding some bool to track if it is inside the Actor is also possible

#

but you'd better put on your Mad Hacker hat on if you're going to do that @plain flume

grizzled stirrup May 4, 2019, 5:17 PM

#

Will Character->IsLocallyControlled() only return true if that character is being controlled by a player on this machine?

glacial pollen May 4, 2019, 5:18 PM

#

yes, including split screen though

grizzled stirrup May 4, 2019, 5:18 PM

#

Thanks!!

dusky light May 4, 2019, 5:56 PM

#

Hello im having a problem with the PlayerCameraManager in MP

#

Basically when I use GetActorForwardVector on the host I get the proper result

#

But if I use it on a client one I get a wrong result

#

APlayerCameraManager* cm = Cast<APlayerCameraManager>(WeaponOwner->GetPlayerController()->PlayerCameraManager);
FVector Impulse = repulsionInstantSpeed * comp->GetMass() * cm->GetActorForwardVector();

#

Value of FVector Impulse for host : Impulse = {X=0.189690173 Y=0.971476078 Z=93461.0781 }

#

value of FVector Impulse for client : Impulse = {X=1.00000000 Y=0.000000000 Z=0.000000000 }

#

Always the same

#

if anyone has an idea much appreciated

past rain May 4, 2019, 6:21 PM

#

@dusky light are the variables being replicated?

#

If you set variables on the server, but dont replicate them to the clients thats an issue

dusky light May 4, 2019, 6:28 PM

#

You mean through the GetReplicatedLifetimeProps function?

#

@past rain

#

I'll try it out

past rain May 4, 2019, 6:30 PM

#

@dusky light yes sir thats what I meant

#

Try it out

dusky light May 4, 2019, 6:57 PM

#

http://prntscr.com/nkex4w

Lightshot

Screenshot

Captured with Lightshot

#

http://prntscr.com/nkex80

Lightshot

Screenshot

Captured with Lightshot

#

http://prntscr.com/nkexbo

Lightshot

Screenshot

Captured with Lightshot

#

Tried it

#

Unfortunately doesn't change anything

#

Impulse = {X=656750.313 Y=0.000000000 Z=0.000000000 }

#

Something changed tho

past rain May 4, 2019, 7:28 PM

#

Doesn't look like the calculations are done on the server

#

Why dont you log each individual component

#

And narrow it down to the variable that's giving you trouble

#

Log out every single variable, a.k.a RepulsionInstandSpeed, cm->GetMass etc

#

See how the values compare on client and on server

#

@dusky light

dusky light May 4, 2019, 7:31 PM

#

RepulsionInstandSpeed is a constant

#

uhm for the rest yeah i'll go through them one by one

#

ShouldI replicate a constant aswell?

#

should*

#

@past rain

past rain May 4, 2019, 7:33 PM

#

I wouldn't think so no

#

But try logging the rest and let's see

dusky light May 4, 2019, 7:34 PM

#

Alright ^^

bleak lily May 4, 2019, 7:39 PM

#

anyone know about replicating a map vote in ue4

#

https://gyazo.com/e4222395d7fab2110ee3d6d9cf5c8c42

Gyazo

#

it works in the sense where the client can see the vote of the host but the host cant see the clients vote

dusky light May 4, 2019, 7:46 PM

#

Alright @past rain

#

http://prntscr.com/nkfiwz

Lightshot

Screenshot

Captured with Lightshot

#

Chopped it up as you suggest

#

Basically all variables are the same for both client and host

#

except for ActorForwardVector

#

Host :

#

ActorForwardVector = {X=0.100177348 Y=0.807002962 Z=0.581988573 }

#

Client

#

ActorForwardVector = {X=1.00000000 Y=0.000000000 Z=0.000000000 }

past rain May 4, 2019, 8:07 PM

#

Might be because actor forward vector is not internally replicated

dusky light May 4, 2019, 8:08 PM

#

if I get Actor forward from Weaponowner directly

#

instead of through the cameramanager I get a somewhat better result

#

atleast I get the same result for the client and host

#

but I only get thee X and Y axis

#

Z axis is empty

#

Ig I have to replicate the APlayerCamerManager somehow?

past rain May 4, 2019, 8:11 PM

#

Do you simply need

#

The direction of the player is so you can shoot the bullet that way?

#

@dusky light

dusky light May 4, 2019, 8:13 PM

#

Basically I have a

#

Gravity gun kinda thing

#

Im holding an object and trying to shoot it away in a certain direction

#

where im pointing

#

@past rain

past rain May 4, 2019, 8:14 PM

#

Are you line tracing?

#

Try this - and replace cm->getforwardactor with FinalAim

#

Damn won't let me copy paate

#

Paste

#

FVector CamLoc;
FRotator CamRot;

PlayerController->GetPlayerViewPoint(CamLoc, CamRot);
FVector FinalAim = CamRot.Vector();

#

I'm just spit balling here but try it @dusky light

winged badger May 4, 2019, 8:26 PM

#

@dusky light blueprints or c++?

dusky light May 4, 2019, 8:27 PM

#

C++

#

@past rain Where do I get the values for CamLoc and CamRot then?

#

from the cm?

winged badger May 4, 2019, 8:27 PM

#

        ULocalPlayer* LocalPlayer = Cast<ULocalPlayer>(Player);
        FVector2D MouseScreenPosition;

        if (LocalPlayer && LocalPlayer->ViewportClient) { LocalPlayer->ViewportClient->GetMousePosition(MouseScreenPosition); }

        FVector WorldOrigin = FVector::ZeroVector;
        FVector WorldDirection = FVector::ZeroVector;
        UGameplayStatics::DeprojectScreenToWorld(this, MouseScreenPosition, WorldOrigin, WorldDirection);

#

should get you on the right track (from PlayerController)

#

you can trace from WorldOrigin to WorldOrigin + WorldDirection * somenumber to get the point where mouse hits the floor if you need it

#

you will have to RPC the relevant information over to the server

#

WorldDirection (your camera forward) is a unit vector, so you can send it as FVector_NetQuantizeNormal, its almost half the size but limited to vectors from -1 to 1

#

if you are sending vectors to server on Tick, and i cannot stress this enough, use UFUNCTION (Server, Unreliable, WithValidation)

dusky light May 4, 2019, 8:33 PM

#

Alright thanks let me try and work out what you send into my code and i'll see

winged badger May 4, 2019, 8:34 PM

#

server generally has no idea where your camera is, whats the size of your viewport, where your mouse cursor is

#

nor does it need to

#

you need to take that information client side, and pack what you need for server to do its part in most efficient way possible

#

then send it inside a server rpc

past rain May 4, 2019, 8:47 PM

#

@dusky light to answer ur question, camloc and camrot gets their value from GetPlayerViewPoint(CamLoc, CamRot)

dusky light May 4, 2019, 8:48 PM

#

Ah right

past rain May 4, 2019, 8:48 PM

#

Its an out parameter, meaning they are sent in as reference

#

The reason I asked u to try that is because GetPlayeraViewapoint is already replicated behind the scenes so u don't need to do shit server and client side

dusky light May 4, 2019, 8:53 PM

#

@past rain You're a hero man

#

It worked

#

@winged badger Thank you too ^^

past rain May 4, 2019, 8:54 PM

#

Heyy

#

I'm glad it did!!

velvet thistle May 4, 2019, 9:33 PM

#

Hi, i'm trying to generate map with rooms. I decided to store every room in sublevel, so i can bake light for each of them and then place them in persistent level. While generating i'm creating some copies of each sublevel. In singleplayer it's ok, but in multiplayer players disconnects for some reason. I was using both "Create instance / Load Level Instance" functions to place sublevels, but both of them dont fix it.

As i understand the problem is here:

" LogPlayerController: Warning: ServerUpdateLevelVisibility() ignored non-existant package '/Game/Maps/Medieval/SubLevel_Instance1' "

After which i get:

"LogNet: UNetConnection::Close: ..." "LogNet: NetworkFailure: ConnectionLost, Error: 'Your connection to the host has been lost.'"

Looks like server is trying to find instance of sublevel on disk but of course cant.

Is there a way to fix it, or may be another way to spawn rooms with baked lighting?(I need to bake rooms in unreal, as I am constantly changing something)

plain flume May 4, 2019, 10:09 PM

#

Hello! Is this Correct way to Quantize vectors?

📎 question.png

past rain May 4, 2019, 10:19 PM

#

@plain flume looks good To me

plain flume May 4, 2019, 10:20 PM

#

@past rain Thanks. And what about when I have once Quantized it. Can I then pass those values to regular FVector and it has same benefits still?

#

For example, after quantize, I pass them to server function that takes FVector. Would it still be optimized

past rain May 4, 2019, 10:26 PM

#

Seeing as how all functions take a vector and non of them take specifically NetQuantize vectors it would make sense that they would remain optimized

#

Feels kinda pointless otherwise

#

I'm just using my own logic here don't know the actual answer

#

But if its your own custom server function

#

Why not just make the argument into a net quantized vector

#

@plain flume

plain flume May 4, 2019, 10:29 PM

#

Yes. That is what I was wondering. I was thinking that if argument itself is NetQuantize, it might work.

#

That would be logical yeah¨

#

Thanks alot

past rain May 4, 2019, 10:32 PM

#

Goodluck :)

cedar finch May 4, 2019, 11:52 PM

#

So I'm making a revive system. Where should I put the Bleed Out timer? In the Character actor or in Gamemode? Everyone has to see it so they know how long he's got before he bleeds out.

#

Or should I put it inside playerstate?

meager spade May 5, 2019, 12:03 AM

#

GameMode is server only

#

so wouldnt make sense there

cedar finch May 5, 2019, 12:04 AM

#

Yea I know, just testin ya. 😉

meager spade May 5, 2019, 12:04 AM

#

PlayerState is where it should be

cedar finch May 5, 2019, 12:04 AM

#

That's what I was thinking too

bleak lily May 5, 2019, 12:04 AM

#

hey I am having an issue with a map vote system in mp

#

the client's vote doesnt count for anything but the hosts does

winged badger May 5, 2019, 6:48 AM

#

@plain flume FVector_NetQuantize are just structs inheriting from FVector with overriden NetSerialize function, you can just assign a FVector to FVector_NetQuantize directly

safe marsh May 5, 2019, 8:25 AM

#

anyone know if there is some way to send console commands to a dedicated server instance of a build

fossil spoke May 5, 2019, 8:28 AM

#

Just setup a Server RPC which sends along a string of what the console command is you want to execute?

#

Easier than setting up your own RCON lol

safe marsh May 5, 2019, 8:28 AM

#

yea

#

I was gonna set up a RPC, But thought there was some kind of server frontend besides the log

#

if I want to send commands outside the client, I would need to set up a TCP listener on the server to send the command I guess. There's no application like a server frontend or remote console shipped with the engine I guess

kindred sandal May 5, 2019, 11:17 AM

#

Is there any service that provides session support for all Platforms?
(Onlinesubsystem)

past rain May 5, 2019, 11:25 AM

#

@kindred sandal maybe something like this? https://www.unrealengine.com/marketplace/en-US/slug/matchmaking-server-function

Matchmaking Server System by FBAM Studio in Code Plugins - UE4 Mar...

Matchmaking Server Function that makes it possible to match players together and start/stop match servers in the background to flexible host the matches, without the need of 3rd party services like Steam or Gamesparks.

#

Or maybe this is better https://www.unrealengine.com/marketplace/en-US/slug/uetopia-online-subsystem

UETOPIA Online Subsystem by UETOPIA LLC. in Code Plugins - UE4 Mar...

OSS features: Identity, Sessions, Matchmaker, Recent players, Friends, Party, and Chat

plain flume May 5, 2019, 12:00 PM

#

Any idea will the Epics subsystem work with games that arent tied to Epic games account?

past rain May 5, 2019, 12:02 PM

#

You mean the online subsystem?

#

Or do you mean their online service that they recently announced, EOS

#

@plain flume

plain flume May 5, 2019, 2:09 PM

#

OSS

#

@past rain

past rain May 5, 2019, 2:13 PM

#

Online sub system has nothing to do with epics accounts

#

It works for steam and such

#

Its done all that for you behind the scenes

#

So all you gotta do is work with the online subsystem, and its very easy to switch platform

#

Whether its ps4, Xbox etc

bleak lily May 5, 2019, 2:17 PM

#

does anyone know how you could go across doing a map voting system?

#

or how to get it to properly replicate

#

I made the votes integers but they do not properly replicate

past rain May 5, 2019, 2:18 PM

#

Have you replicated them?

bleak lily May 5, 2019, 2:18 PM

#

Well yeah the variables are set to replicate

past rain May 5, 2019, 2:18 PM

#

Can you post a screenshot

bleak lily May 5, 2019, 2:18 PM

#

yeah before I do that, is gamestate fine for doing this type of stuff

#

I put the points in a gamestate

past rain May 5, 2019, 2:20 PM

#

Yeah game state sounds good

bleak lily May 5, 2019, 2:20 PM

#

this is for the UI

#

https://gyazo.com/d75432678a57c826d85a6d7b6656a822

Gyazo

#

for the custom event I just did a get map vote and add it by 1

#

https://gyazo.com/86acb49feb08e9f76d2abc1d945e4985

Gyazo

past rain May 5, 2019, 2:21 PM

#

It looks like this is done locally on the client

#

Think you'll need to then tell the server about it

bleak lily May 5, 2019, 2:22 PM

#

how would I do that

past rain May 5, 2019, 2:22 PM

#

I've never really done multiplayer in blueprints I don't think I'm qualified to help :/

bleak lily May 5, 2019, 2:23 PM

#

yeah basically the host can vote and it shows up for everyone else but if the client does it will show up for them but not the host

past rain May 5, 2019, 2:23 PM

#

Yeah, the part where you tell the host who you voted for, then the host tells the rest of the clients

#

Is the missing part

#

Have you watched tutorial about blueprint multiplayer on YouTube?

#

There is a shit ton

bleak lily May 5, 2019, 2:24 PM

#

I mean I tried looking for like a specific video on voting aand stuff but couldn't find any

past rain May 5, 2019, 2:25 PM

#

Its better to learn the basics and fundamentals, don't gloss over it

#

Multiplayer is complicated

vast isle May 5, 2019, 2:57 PM

#

Hi, can somebody help me on something ? I know to open a door with a collision box and the "Switch has autority", but I can't find a way to check if a button on the gamepad is pressed. how could I send a boolean state (is_button_pressed) from the client to the server ?, thanks 😄 !

neon violet May 5, 2019, 3:06 PM

#

Just right click type in your button on the gamepad and it will make an event for you then on pressed run your code @vast isle

vast isle May 5, 2019, 3:07 PM

#

yes, but it only update from the server side if I do it this way

#

let's say, I want the door to open when a client click on it

#

I have acces to this value: is the client is in the collision box, is the client aiming at the door

#

but I cannot acces to : is the client gamepad button is pressed

kindred sandal May 5, 2019, 3:31 PM

#

https://github.com/gogcom/galaxy-ue4-oss-plugin

GitHub

gogcom/galaxy-ue4-oss-plugin

OnlineSubsystem interface implementation for GOG Galaxy platform - gogcom/galaxy-ue4-oss-plugin

vast isle May 5, 2019, 3:31 PM

#

I just found 😄

kindred sandal May 5, 2019, 3:31 PM

#

GOG Also Provides OSS

#

For Free

#

almost most features of upcoming Epic online services

vast isle May 5, 2019, 3:31 PM

#

using the search fonction in discord lead me to the awnser 😄

solar stirrup May 5, 2019, 5:38 PM

#

I checked fast array serialization, just something that puts me off, the order in the array is not guaranteed to be the same on server and client @winged badger ?

plain flume May 5, 2019, 5:53 PM

#

@past rain i mean that for example if you use steams subsystem, game needs to be on steam. If you use Epics subsystem, do you need your game to be on Epics store?

past rain May 5, 2019, 6:38 PM

#

Yeah

#

Epics subsystem is for epic

#

Wouldnt make sense for it to be elsewhere

#

@plain flume

#

Any reason you'd wanna use epics subsystem elsewhere?

thin stratus May 5, 2019, 6:50 PM

#

@past rain @plain flume You don't need to be on Epic's store to use the Subsystem

#

Epic's store is just a frontend to the subsystem.

#

You can even write your own if you want

#

Or sell it on a different store.

past rain May 5, 2019, 6:51 PM

#

Thats exactly what I said

#

https://gyazo.com/d29c9460e836f4a6e427723fc5a24cff

Gyazo

thin stratus May 5, 2019, 6:52 PM

#

I just based this on the last thing you wrote

past rain May 5, 2019, 6:52 PM

#

Im not exactly sure what he meant

#

there is no such thing as steam subsystem

#

its all called online subsystem

thin stratus May 5, 2019, 6:53 PM

#

Online Subsystem is just an interface.

past rain May 5, 2019, 6:53 PM

#

yes

thin stratus May 5, 2019, 6:53 PM

#

Steam Subsystem implements the SteamSDK via the Interface.

past rain May 5, 2019, 6:53 PM

#

which works for multiple platforms

thin stratus May 5, 2019, 6:53 PM

#

To use Steam you need to be on the Steam Store.

past rain May 5, 2019, 6:54 PM

#

For the interface to call the correct steam functions, you're gonna need to install the steam sdk

#

I asked him if he meant the newly announed epic games online service

#

but he didnt

thin stratus May 5, 2019, 6:57 PM

#

Based on the last question he means exactly that.

past rain May 5, 2019, 6:57 PM

#

well I asked and he said no 😄

thin stratus May 5, 2019, 6:57 PM

#

To use Steams SDK which is in UE4 is known as Steam Subsystem, you need to have the game on Steam.

past rain May 5, 2019, 6:57 PM

#

If thats the case, Epic online service, EOS - is for any platform

thin stratus May 5, 2019, 6:57 PM

#

And as you state, Epic does not have that limitation.

past rain May 5, 2019, 6:57 PM

#

yeah

#

but its not really out yet

thin stratus May 5, 2019, 6:57 PM

#

So I got a bit confused when you said "Epic Subsystem is for Epic" :P sorry

past rain May 5, 2019, 6:58 PM

#

I do wonder though, whats the pros and cons of using eos over steam online services for a steam game

thin stratus May 5, 2019, 6:58 PM

#

I read that like "Epic Subsystem only works on Epic Store.". My bad!

#

Mainly Crossplatform support out of the box.

#

If you game has Steam fully setup, that doesn't mean that selling it on XBox will directly support the same features.

#

E.g. phone subsystems usually don't even have a proper session interface implemented.

#

So it's a lot of work getting you game to work on all platforms if you have to deal with the quriks of every single subsystem

#

Even if it's an interface that tries to combine them.

past rain May 5, 2019, 6:59 PM

#

You saying EOS takes care of all of that?

thin stratus May 5, 2019, 6:59 PM

#

EOS is cross platform yes

#

It's what Fortnite uses after all

past rain May 5, 2019, 7:00 PM

#

So all you have to do is write one single system

thin stratus May 5, 2019, 7:00 PM

#

Correct

past rain May 5, 2019, 7:00 PM

#

and you can ship it to any platform

#

thats great

thin stratus May 5, 2019, 7:00 PM

#

The only thing you might need to do is write a different authentication code for each platform

#

EOS will create a user if you authenticate via Steam.

#

You can then probably authenticate to the same user via Xbox and PS4.

#

So you basically use the current subsystem to authenticate with EOS.

#

Like that all your data stays under one main user on the EOS backend.

#

Which makes Matchmaking equally straight forward.

#

Cause all your users are already in one database.

past rain May 5, 2019, 7:01 PM

#

Yeah that makes things a lot easier

#

too bad matchmaking wont come out until november at the very least

thin stratus May 5, 2019, 7:02 PM

#

Yeah, GameSparks offered similar stuff.

#

But with their recent change in pricing, it got very anti-indie.

past rain May 5, 2019, 7:02 PM

#

well

#

teh amount of money epic has made out of fortnite means they can literally do anything they want forever

#

which is great for us devs, cuz they seem to be doing pro-dev things

#

If they make some user friendly decisions, and actually makes the epic store into a user friendly platform, that would be great because no one likes to give valve 30% of their income

thin stratus May 5, 2019, 7:04 PM

#

Looking at the development of #epic-games-store it doesn't seem to be good in gamer's eyes :D

past rain May 5, 2019, 7:04 PM

#

Its not good in the gamers eyes

#

they are making poor decisions

#

And its pretty sad

#

But we can always hope

#

Valve wont be threatened until big developers willingly put their games on epic store rather than steam, instead of epic driving a truck full of money to their frontdoor

solar stirrup May 5, 2019, 8:13 PM

#

Fast Array Serialization question, been thinking about using it for my inventory

#

however my inventory has slots, so items can be in different slots and it will need to be synchronized between the server and client

#

is it right that using fast array serialization does not guarantee to give the same order server and client side?

twin juniper May 5, 2019, 8:32 PM

#

correct

#

but in ur item struct why not do ItemSlot = x ?

#

that way itemslot is not determined by array indice

solar stirrup May 5, 2019, 8:40 PM

#

Replication is done at the end of the frame right @twin juniper ?

#

so if I make multiple items in the array dirty

#

they'll all be replicated at the same time after the frame ends right?

grand kestrel May 5, 2019, 8:51 PM

#

@solar stirrup Yes, it's not going to replicate several times in a frame if you change several elements, it'll replicate once

#

As a general rule of thumb you can give UE4's networking/replication the benefit of the doubt when it comes to good practices and working well

#

Its quite robust

solar stirrup May 5, 2019, 8:52 PM

#

Damn I love UE4 then

grand kestrel May 5, 2019, 8:52 PM

#

Ah ex-unity?

solar stirrup May 5, 2019, 8:52 PM

#

I still use Unity

#

Just that the studio i'm working with uses UE4

grand kestrel May 5, 2019, 8:53 PM

#

They don't really have anything sufficient in the way of networking, and if they do its third party

solar stirrup May 5, 2019, 8:53 PM

#

^

grand kestrel May 5, 2019, 8:53 PM

#

Its the one reason I'll always use UE4 over unity

#

Even if I make a predominately single player game I don't want to rule out MP

solar stirrup May 5, 2019, 8:54 PM

#

Also since my items are stored in a data table, should I make a copy of an item when I instantiate it for safety or do I not need to do that?

#

same

grand kestrel May 5, 2019, 8:54 PM

#

For safety? You mean you're worried you might end up modifying the data table?

solar stirrup May 5, 2019, 8:54 PM

#

yep

grand kestrel May 5, 2019, 8:55 PM

#

So its basically a struct

#

Quite a simple inventory then

solar stirrup May 5, 2019, 8:56 PM

#

I mean the items are created and stored in a data table, if I want to add an item to a player's inventory, editing the item won't edit the datatable right?

grand kestrel May 5, 2019, 8:56 PM

#

I wouldn't know, I've never been in a situation where I could modify it that way

solar stirrup May 5, 2019, 8:56 PM

#

hmm okay

#

i'll check it out

grand kestrel May 5, 2019, 8:56 PM

#

Best to setup a test scenario

#

And see

solar stirrup May 5, 2019, 8:56 PM

#

yeah

dull remnant May 6, 2019, 12:48 AM

#

Can anyone suggest which database should i use in backend for an unreal real time multiplayer game

past rain May 6, 2019, 12:51 AM

#

@dull remnant see if this is helpful https://answers.unrealengine.com/questions/794721/database-integration.html

#

Apparently it costs 300 bucks a month now though yikes

#

There is also this - https://www.unrealengine.com/marketplace/en-US/slug/usqlite-database

USQLite Database by Bruno Xavier Leite in Code Plugins - UE4 Marke...

This plugin empowers you to save and load data to and from SQLite Databases in Unreal Engine without forcing you to write a single line of SQL Code (or Blueprint Spaghetti).

dull remnant May 6, 2019, 12:53 AM

#

i am not asking for a backend server

#

i am implementing my own back end

#

thank you so much for increasing my knowledge

dark edge May 6, 2019, 1:44 AM

#

What's the best way to update stuff locally when possessing a new pawn?

low pond May 6, 2019, 1:50 AM

#

whats the best way to copy data between game sessions on a map change?

mossy sequoia May 6, 2019, 3:09 AM

#

Hi all

#

I'm new to multiplayer and started a tutorial on doing it with steam

twin minnow May 6, 2019, 4:07 AM

#

is there a way to run two standalone game instances for a dedicated server in the unreal editor?

#

nvm im dumb

wary willow May 6, 2019, 6:06 AM

#

Yeah

#

They fucked up GameSparks

#

(Amazon)

#

But, nothing no one with a brain didn't see coming.

flint plaza May 6, 2019, 6:08 AM

#

General question: I have a pawn on which I call RPCs if it is locally controlled. While playing in editor for 3 players, if I play in the server instance, the is locally branch goes to the locally controlled part twice (meaning it is locally controlled on the server?) while it only goes to the client part once and the other time to the server part only if you play on the Client window. Can someone explain this?

winged badger May 6, 2019, 10:53 AM

#

without showing how you call it the question is meaningless @flint plaza

flint plaza May 6, 2019, 10:57 AM

#

📎 i1.PNG

#

I changed the condition though. previously, the node was "Is Locally controlled"

winged badger May 6, 2019, 11:48 AM

#

with input

#

islocallycontrolled is always true

#

or there is no input

flint plaza May 6, 2019, 11:51 AM

#

It went to the false logic when I sent input from the client window

flint plaza May 6, 2019, 12:54 PM

#

How can I differentiate between the player playing on the server window and the client window? The player on the server window executes the server code both times whereas the client window player executes the client code once and the server code on the server side

bitter oriole May 6, 2019, 12:55 PM

#

Use roles

flint plaza May 6, 2019, 1:07 PM

#

okay thanks I will try that

#

Does anyone have a good commented multiplayer project that I can use as a learning tool for multiplayer practises? It would be very knowledgeable to see how things are implemented in the best practises rather using my own hacks for stuff