#multiplayer | Unreal Source | Page 438

winged badger Jan 22, 2019, 12:38 AM

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like you just did with the array

jade gazelle Jan 22, 2019, 12:39 AM

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But it is designed that way in BP , as you just said above and as the documentation says

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So I don’t know how that’s a misuse really

winged badger Jan 22, 2019, 12:39 AM

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no it is designed for replication callbacks

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it seems convenient to use it as a setter function

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but

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landmine

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it also vastly reduces the readability of your code

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especially if someone else has to go through it at a later date

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or yourself, 2 years from now

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writing code isn't a contest in who uses the least number of nodes/characters

pallid token Jan 22, 2019, 12:43 AM

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I have something that is multicast to all connected clients, but it's not executed on the server. how is this possible?

winged badger Jan 22, 2019, 12:43 AM

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if it reads like english, thats good... if its easy to maintain.... good, if there are no repetitions... good, if you can extend it rather then modify it... super

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if it takes twice as much space... #life

flint plover Jan 22, 2019, 1:21 AM

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Quick question guys, I'm nearing the end of my project and everything seems to be working great. It's a 1v1 multiplayer game, and I'm wanting to host online play but I'm unsure how to go about it. Would a listen server do fine? just have one player host and the other join. Or would this allow the host to cheat somehow?

worthy perch Jan 22, 2019, 1:25 AM

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It would allow the host to cheat, yeah.

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@pallid token Is that on a dedicated server? If not, I do think that some people had issues with listen servers and some... things like replication going wrong.

woven bay Jan 22, 2019, 1:34 AM

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Quick question, what's the benefit to using a PlayerController vs the default generated Character?

worthy perch Jan 22, 2019, 1:35 AM

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https://answers.unrealengine.com/questions/216113/playercontroller-vs-character.html

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https://forums.unrealengine.com/development-discussion/blueprint-visual-scripting/2760-what-s-the-purpose-of-a-playercontroller

Unreal Engine Forums

Build powerful visual scripts without code.

woven bay Jan 22, 2019, 1:36 AM

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ahh thank you

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I was following a tutorial in C++ trying to get a better understanding but unfortunately they never went into much detail as to why use a Controller base in a multiplayer scenario

twin juniper Jan 22, 2019, 2:13 AM

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ok so

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i have an actor which in its BeginPlay sets a dynamic material for its mesh

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and it uses a parameter

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which is decided using a random number

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if i let it be it ends up being different in every client obviously

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how do i replicate this parameter

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how can i like

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send a explicit signal to repliccate that and not continue the function until that variable's been replicated

jolly siren Jan 22, 2019, 4:59 AM

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Has anyone written code to output network stats to UI like Fortnite?

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📎 unknown.png

sharp pagoda Jan 22, 2019, 5:26 AM

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You can grab that info from UNetConnection

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@jolly siren , assuming that's what you're asking

cedar finch Jan 22, 2019, 5:26 AM

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So Is there anything I need to know about In-Editor multiplayer testing such as bugs or limits? I ask this because I'm running into issues where only two players are loading HUD objects correctly and the last two clients load nothing.

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I'm testing with 4 players

sharp pagoda Jan 22, 2019, 5:27 AM

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You can get the Ping from the player state through ExactPing, not sure if the netconnection stores it or not

cedar finch Jan 22, 2019, 5:31 AM

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Hmmm so in my Gamemode I add the playercontrollers to an array OnPostLogin but for some reason only two get added when testing in the editor.

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How do I test with 4 players if I can't use the editor? All 4 players are in the game but only two of them are added into the Array in Gamemode. How is that possible?

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hold up i may have found the issue

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Nope. Still only gets 2 of the 4 players. 😦 This sucks because I need to test things that involve a NumPlayers variable.

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and it only returns 1 or 2 and never 3 or 4

jolly siren Jan 22, 2019, 5:38 AM

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@sharp pagoda ahh nice, I'm looking there now. I was using NetDriver, but it was giving higher values than I was expecting

cedar finch Jan 22, 2019, 5:47 AM

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Ok let me ask you guys this question: Where should I get and set a "NumberOfPlayers" variable? Gamemode only counts the server so it always returns 1. If i play as a listen server it returns 2.

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IDK why it won't work. I guess I'll just use "GetNumPlayers" node and "GetNumSpectators" and add them together in order to set my variable.

strong abyss Jan 22, 2019, 6:07 AM

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@cedar finch You can test in editor with more that 2 players.
In my game, I use PostLogin to add the new PlayerController to a vector. I could get the size of this array to know the number of players.

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If you are using seamless travel though, postlogin won't get called, you need to override SwapPlayerControllers and do something similar to what you would do in postlogin.

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in my xp, one bug with editor for us has been launching the game from editor on multiple computers, we would need to join a game at the same time if >2 players, otherwise it wouldn't work. The error didn't happen when building the game though.

cedar finch Jan 22, 2019, 6:13 AM

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Hmm ok maybe that's my issue. I have everything in my PostLogin and I'm testing directly on my level and not starting from the main menu then connecting in. I'm doing the same with the player controllers and adding them to an array for lots of other stuff

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I know the node below doesn't work when I test directly on my level instead of joining from the main menu. But I have to do that because it wont load the level when testing in-editor. It just stays on the loading screen when traveling to the level. https://i.gyazo.com/38af5d956cae3d8d6b3c155785dac97a.png

strong abyss Jan 22, 2019, 6:17 AM

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Yeah you can't use seamless travel in editor.

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But if your code is in PostLogin, then you should be okay if you are launching the level from editor.

cedar finch Jan 22, 2019, 6:20 AM

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Hmm. IDK Here is where I set it. Maybe you know what I'm doing wrong: https://i.gyazo.com/b7e439db54a39e3cd181554307517c02.png

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If I run as dedicated It prints "1" But if I run as a listen it prints "2"

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I have 4 players and need it to print 4

strong abyss Jan 22, 2019, 6:26 AM

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You don't need those delays.

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But everything else looks fine.

cedar finch Jan 22, 2019, 6:27 AM

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I just added them in now because It wasn't working I thought maybe it'd help lol

strong abyss Jan 22, 2019, 6:27 AM

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How are you changing the number of players?

cedar finch Jan 22, 2019, 6:28 AM

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Well I need the number of players for setting enemy numbers. I also need that array of all player controllers so I can do things such as add them to the scoreboard as well as add their score to everyones HUD.

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I can use get all actors of class and do it. but It's bugging me that this isn't working when It should

strong abyss Jan 22, 2019, 6:30 AM

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Are you changing the number of players here?

📎 unknown.png

cedar finch Jan 22, 2019, 6:30 AM

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Plus get all actors of class could execute before everyone connects then things would realy mess up.

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Yes thats where i'm changing it

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That's why I went with the Onlogin node so no matter what they would get added into the array and count

strong abyss Jan 22, 2019, 6:31 AM

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Hmm.. you must be removing them somewhere else then.
I just copied that bp you shared and it is printing the correct results

cedar finch Jan 22, 2019, 6:32 AM

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IDK I just made a brand new array and plugged it in instead and it's doing the same thing.

strong abyss Jan 22, 2019, 6:32 AM

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In world settings do you have the correct game mode plugged in

cedar finch Jan 22, 2019, 6:32 AM

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Is your's set to replicate?

strong abyss Jan 22, 2019, 6:33 AM

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The game mode only exists on the server, so no replication is wanted.

cedar finch Jan 22, 2019, 6:33 AM

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Yea that's what I thought

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Just checkin

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The gamemode is set in world settings. Let me change levels and see if that helps or refreshes

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Huh......IDK it's the same thing

strong abyss Jan 22, 2019, 6:36 AM

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When you put a break point in there does it hit the correct number of times?

cedar finch Jan 22, 2019, 6:37 AM

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What tha! I had replicated set. I set it to none and now it works.

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OMG

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Dang...

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Well it's printing now. I'm just stupid and had it set to replicate for some reason.

strong abyss Jan 22, 2019, 6:38 AM

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Nice.

cedar finch Jan 22, 2019, 6:39 AM

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Thanks for helping me out. I really do appreciate it. Sorry it was a silly error on my part

strong abyss Jan 22, 2019, 6:43 AM

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ha no prob. That's game dev haha

random nymph Jan 22, 2019, 10:41 AM

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Hello. What is the last moment in playercontroller's lifetime to still call rpc functions?

thin stratus Jan 22, 2019, 11:55 AM

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EndPlay maybe?

jade gazelle Jan 22, 2019, 1:51 PM

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Game mode log out would work no?

bitter oriole Jan 22, 2019, 1:51 PM

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Game mode doesn't exist on clients though

jade gazelle Jan 22, 2019, 1:52 PM

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Ahhh never mind

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Thought he meant on server

bitter oriole Jan 22, 2019, 1:54 PM

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He said player controller, so 😛

manic pine Jan 22, 2019, 1:56 PM

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dont think theres any way you could at the same time know when pc is about to die and also guarantee an rpc send before it does

jade gazelle Jan 22, 2019, 1:56 PM

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Server has a copy of the controller though, so you could send an RPC from server —> client in game mode log out

manic pine Jan 22, 2019, 1:57 PM

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soon as it's destroyed its actor channel would die, failing the rpc

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would be a bad way to do it anyhow, since you cant know how the client logged out

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he might be out of the game already by the time the PC is disconnecting on server

pallid token Jan 22, 2019, 2:51 PM

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AServer RPC runs as if it were called from the server, right?

thin stratus Jan 22, 2019, 3:06 PM

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Technically you could see it that way, yeah

pallid token Jan 22, 2019, 3:37 PM

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So, I have a server RPC, that calls a function in another class, Then, from that class, another function from another class. Is that whole stack called from the server in the same way?

bitter oriole Jan 22, 2019, 3:41 PM

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Well, your client calls a server RPC in the first place

pallid token Jan 22, 2019, 3:41 PM

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Yes

bitter oriole Jan 22, 2019, 3:41 PM

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Which means it basically sends a message to itself on the server, to call this function

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The caller is always going to be the server here

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The RPC mechanism isn't a language feature, it''s an UE mechanism

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So the whole thing will happen on the server

manic pine Jan 22, 2019, 3:42 PM

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yeah, the client is never part of the call stack, when it runs the server rpc all its really doing is telling the engine to send a packet to the server telling it to run function X on object Y

pallid token Jan 22, 2019, 3:42 PM

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Ok, thanks!

jolly siren Jan 22, 2019, 10:10 PM

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Should UNetConnection::InPacketsLost / UNetConnection::InPackets be giving me in packet loss percentage?

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I'm getting 0 even when I do Net Pktloss=x

winged badger Jan 22, 2019, 10:14 PM

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silly question, but... integers?

jolly siren Jan 22, 2019, 10:15 PM

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That is what those properties are, yes

winged badger Jan 22, 2019, 10:15 PM

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i mean, you didn't divide a lesser integer with a greater one by any chance?

jolly siren Jan 22, 2019, 10:17 PM

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ah yeah I must be tired

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eyesfire

cerulean hamlet Jan 22, 2019, 11:07 PM

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Lets say I have a reference to an actor in a streaming level but that streaming level hasn't finished loading when I receive that reference

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at what point does Unreal go back and fix up that reference?

winged badger Jan 22, 2019, 11:50 PM

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if the Actor was loaded from a package, it can be referenced over network even without it being replicated

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so reference shouldn't need fixing

versed socket Jan 23, 2019, 3:47 AM

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The other day I was asking about OnlineSubsytem*. What it is, how it fits in with everything else, etc. You guys did a good job of explaining it and said that I should ask about other related things, too.

One such thing that I'm really struggling to find resources to learn about is with setting up and using the VOIP system. I tried implementing it (specifically the recently added native one from 4.19, not the Steam one) for one of my projects but when I excitedly got a friend to test it with me, it didn't work. Probably I just didn't set it up properly.

I'm aware that there are some things you need to add to your DefaultEngine.ini and that you need to make some calls to some PlayerController C++ methods, but that's all I can ever find. To the best of my knowledge, nobody has ever demonstrated how to use it. The Steam one, sure, but not for the newer, native engine one.

strong abyss Jan 23, 2019, 4:17 AM

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Hey all! I have a grenade setup as shown above. When a grenade is thrown, the server applies an impulse to the RootSphere. This works great on the server, and the grenade behaves as expected. But on my client, it just floats in place. I have Replicate Movement set to true on the BP_FragGrenade, but it appears to not be replicating.
What am I missing about physics objects and replicating their movement?

📎 unknown.png

versed socket Jan 23, 2019, 4:35 AM

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@strong abyss This is a question more for the #legacy-physics channel, I'd think. Basically, though, there's a bunch of ways to fix this. You can set a "DesiredLocation" and in the OnRep you can do a Lerp or something to that position. Also, when you enable Physics so that you can add impulse, make sure you do it for everyone and not just for the server (which is why it's floating in place)

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Replicating physics is one of those things that I'm currently struggling to learn as well and is something that nobody really knows the exact best implementation for, so don't take my word as fact

gaunt crown Jan 23, 2019, 8:16 AM

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How would I replicate everyone but the Owner?

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I tried this but I get errors when I have two players connected on Dedicated Server.

📎 unknown.png

thin stratus Jan 23, 2019, 8:21 AM

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📎 unknown.png

gaunt crown Jan 23, 2019, 8:21 AM

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Yep. Me dumb dumb.

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I just literally compiled and saved what you have there.

thin stratus Jan 23, 2019, 8:22 AM

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Also that Parameter is misleading

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stuff like this shouldn't use RPCs

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Or rather

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Not Multicast RPCs

gaunt crown Jan 23, 2019, 8:22 AM

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Hm?

thin stratus Jan 23, 2019, 8:23 AM

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RPCs are fire and forget, if people aren't in range of the person activating the light or the join into the game after the person turned on the light, they will never get teh multicast

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You use RepNotify variables for that.

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Passing the Pawn as "self" into an RPC that is called inside that very Pawn makes no sense, you can just use "self" after the RPC. No need to pass that reference.

gaunt crown Jan 23, 2019, 8:24 AM

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Or you could always do Event Begin Play and check if it's visible and set visibility for the other player.

thin stratus Jan 23, 2019, 8:24 AM

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To not do it for the local player, call "IsLocallyControlled" on the Pawn

gaunt crown Jan 23, 2019, 8:24 AM

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But yeah RepNotify is nice.

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Yeah

thin stratus Jan 23, 2019, 8:24 AM

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Na, you don't do that BeginPlay stuff

gaunt crown Jan 23, 2019, 8:24 AM

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📎 unknown.png

thin stratus Jan 23, 2019, 8:24 AM

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Yeah and now replace that RPC with a RepNotify

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Then your code is top

gaunt crown Jan 23, 2019, 8:24 AM

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Hm ThinkingRick

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So make a Variable aight

thin stratus Jan 23, 2019, 8:25 AM

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Make a boolean variable "bFlashlightOn"

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Set it to RepNotify

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You can actually also tick "SkipOwner"

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Then you don't need the LocallyControlled stuff

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In the RepNotify function (will automatically pop up in your functions tab), you then toggle the visibilty

gaunt crown Jan 23, 2019, 8:26 AM

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Yeah I skip owner because I want to be able to have people across the globe actually play without interruptions of stuff reacting later

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Like turning on a Flashlight instantly without a 300 millisecond wait lul

thin stratus Jan 23, 2019, 8:26 AM

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You are also already setting it locally so it's fine to skip the owner

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As long as you never want to toggle the light force by the Server

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Cause then you'd still skip the owner, which is bad

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E.g. Battery ran out on the Server -> Set boolean to false -> owner never shuts off flashlight

gaunt crown Jan 23, 2019, 8:27 AM

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I only want to skip owner for toggling it.

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So the Multicast doesn't override and cause interruptions and Client can do his thing.

thin stratus Jan 23, 2019, 8:28 AM

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The multicast is a bad idea for this, as already explained

gaunt crown Jan 23, 2019, 8:28 AM

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Yeah

thin stratus Jan 23, 2019, 8:28 AM

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If you have a player that is not relevant to that pawn and becomes relevant, they never see the flashlight change

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Multicasts don't call again when you join or become relevant

gaunt crown Jan 23, 2019, 8:28 AM

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Changing now. Cheers 😄

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I can do Skip Owner btw because I leave the Client related stuff out of the Variable.

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Works a charm.

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Much appreciated. I've learnt some extra info today 😃

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📎 unknown.png

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📎 unknown.png

hoary spear Jan 23, 2019, 9:22 AM

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So, RepNotify would trigger if a player joins after the server sent the original notify ?

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Like, it would also recieve it, when joining?

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So it would be someting like this:

Someone did something!
server gets informed, and sets the repNotify variable
All joined players are informed via repNotify

abit later...

New player joins.
New player recieve the very same repNotify event that the others got

Is this correct?

thin stratus Jan 23, 2019, 9:24 AM

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Yeah

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But the reason is not the RepNotify magically calls

hoary spear Jan 23, 2019, 9:25 AM

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Awesome. I never considered that scenario

thin stratus Jan 23, 2019, 9:25 AM

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New Players, or players that become relevant, receive the updated variable

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Receiving that value will trigger the RepNotify

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A normal Replicated Variable will of course also be received, but no RepNotify event to call from it

hoary spear Jan 23, 2019, 9:27 AM

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Thanks for the clearify 😃 Makes alot of sense that they would recieve it ^^ Cant imagine what a pain it would be to manually have to update every joined player with all the needed variables..

gaunt crown Jan 23, 2019, 9:42 AM

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@thin stratus Do you know why Pitch Rotation is not replicated?

thin stratus Jan 23, 2019, 10:13 AM

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Probably cause it's controller rotation

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Think the view stuff is for that

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GetPlayerView or something like that

versed socket Jan 23, 2019, 11:14 AM

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The other day I was asking about OnlineSubsytem*. What it is, how it fits in with everything else, etc. You guys did a good job of explaining it and said that I should ask about other related things, too.

One such thing that I'm really struggling to find resources to learn about is with setting up and using the VOIP system. I tried implementing it (specifically the recently added native one from 4.19, not the Steam one) for one of my projects but when I excitedly got a friend to test it with me, it didn't work. Probably I just didn't set it up properly.

I'm aware that there are some things you need to add to your DefaultEngine.ini and that you need to make some calls to some PlayerController C++ methods, but that's all I can ever find. To the best of my knowledge, nobody has ever demonstrated how to use it. The Steam one, sure, but not for the newer, native engine one.

thin stratus Jan 23, 2019, 11:21 AM

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Wasn't the Engine one wrapping the Steam one?

manic pine Jan 23, 2019, 11:55 AM

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engine had different ones depending on oss

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not quite sure how it is past 419

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its always been very messy though, and impossible to test using just one comp

thin stratus Jan 23, 2019, 12:00 PM

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Yeah, def. I had it working once with very little changes.

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But I would need to actively grab my laptop and setup a test project

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No time for that atm

cerulean hamlet Jan 23, 2019, 1:12 PM

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@winged badger I'm asking where is the code that resolves that reference

gaunt crown Jan 23, 2019, 3:07 PM

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@thin stratus Hey man. Just wondering, is this the best way to replicate the Pitch Rotation for the character?

📎 unknown.png

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📎 unknown.png

thin stratus Jan 23, 2019, 3:10 PM

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https://api.unrealengine.com/INT/API/Runtime/Engine/GameFramework/APlayerController/GetPlayerViewPoint/index.html

APlayerController::GetPlayerViewPoint

Returns Player's Point of View For the AI this means the Pawn's 'Eyes' ViewPoint For a Human player, this means the Camera's ViewPoint

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Could try utilizing this from the server

gaunt crown Jan 23, 2019, 3:12 PM

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How do I get that Variable.

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Can't find it.

hushed maple Jan 23, 2019, 6:51 PM

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I want to host a game on my streaming PC and give players online the ability to control a characters basic movements. Is there any easy to setup ways to achieve this for a noob at programming 😛

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Even just a single button one a website that sends that feeds the input into the game

meager spade Jan 23, 2019, 7:01 PM

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well your game can listen to requests from an API sure

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when your game gets the callback, it does whatever was pressed

hushed maple Jan 23, 2019, 7:06 PM

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Is there a particular API I could look into? I'm doing some research myself too:)

thin stratus Jan 23, 2019, 7:14 PM

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Well, HTTP Requests could do that I assume?

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With a JSON body for the instructions

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That streaming PC needs a static IP though

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Otherwise you gotta update the scripts every time

hushed maple Jan 23, 2019, 7:16 PM

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hmm I did try one of the HTTP plugins from the marketplace but couldn't get it working. Maybe it was my IP that was the issue

thin stratus Jan 23, 2019, 7:28 PM

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This is def nothing to pull off in an evening if you have no idea what you are doing

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If you want TwitchPeople to use your game

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you might want to check the twitch plugin on the marketplace

hushed maple Jan 23, 2019, 7:29 PM

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cool I'll check it out, I don't know what I'm doing either really :P, just brainstorming ideas

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Just noticed this, couldn't I grab keywords written in "messages"

📎 2019-01-23_19h32_18.png

ebon bramble Jan 23, 2019, 7:32 PM

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vaRest plugin ???

hushed maple Jan 23, 2019, 7:33 PM

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this is from Twitch Integrator

ebon bramble Jan 23, 2019, 7:34 PM

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Oohh. Hmm you could integrate twitch with your own middleman API server and then have the server talk to the game .. no ?

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You are basically making a twitch plays Pokemon ? Lol

hushed maple Jan 23, 2019, 7:35 PM

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Actually it's related to paranormal research 😉

ebon bramble Jan 23, 2019, 7:35 PM

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👻

hushed maple Jan 23, 2019, 7:35 PM

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I have some crazy ideas lol

twin juniper Jan 23, 2019, 9:42 PM

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I want to make my game multiplayer but don't know where to start?

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Any tips would be greatly appreciated

winged badger Jan 23, 2019, 9:53 PM

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

Cedric Neukirchen

eXi

Multiplayer Network Compendium

twin juniper Jan 23, 2019, 10:19 PM

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Thank you so much bro!

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This is epic lol

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@winged badger Thank you!

versed socket Jan 23, 2019, 11:40 PM

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Just wanted to follow up on my post earlier: does anyone actually know how to use the native UE4 VOIP system introduced with 4.19 via its OnlineSubsystemNull interface (i.e. not Steam)?

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I'm trying to figure out how to make it work on my own test projects so that I know what the actual steps to make it work are, which I can then work on incorporating into my own actual projects

dapper summit Jan 24, 2019, 12:26 AM

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hey anyone know what im doing wrong i set a host button that works fine but when i join a session this happens the player that has joined has no body and can't move and has no HUD

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📎 unknown.png

fringe dove Jan 24, 2019, 12:37 AM

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@versed socket you still use OSS steam, in 4.20 or 4.21 they made steam use the same stuff as the null subsytem by sharing a common base implementation through onlinesubsystemutils

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before, steam would do the encoding/decoding and possibly the mic thresholding, now that is all through OnlineSubsystemUtils and VoiceCaptureWindows

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DefaultEngine.ini needs

[OnlineSubsystem]
bHasVoiceEnabled=true

[Voice]
bEnabled=true```

DefaultGame.ini:
```ini
[/Script/Engine.GameSession]
bRequiresPushToTalk=false```

(or true if you want push to talk, then you need an input config for it too)

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when you connect you need to do so by creating a session on host and joining a session on client, if you just host through '?listen' it may not work by default

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you also need to raise the default bandwidth limits a bit

dapper summit Jan 24, 2019, 12:47 AM

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you talking to me or the other guy?

fringe dove Jan 24, 2019, 12:47 AM

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jfaw

dapper summit Jan 24, 2019, 12:47 AM

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alright

fringe dove Jan 24, 2019, 12:51 AM

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@dapper summit on yours do you have a default player pawn configured for your game mode?

dapper summit Jan 24, 2019, 12:51 AM

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i fixed the movement problem all i need is to actually be able to join

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i dont know the nodes for it i hate servers but it would be nice to get it out of the way

fringe dove Jan 24, 2019, 12:52 AM

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what did you do to fix the movement problem?

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and the movement problem was after joining I thought?

dapper summit Jan 24, 2019, 12:53 AM

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it was when i joined it gave me no controls but i set it in the level blueprint

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📎 unknown.png

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i have these set up in the game instance

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fringe dove Jan 24, 2019, 12:55 AM

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@dapper summit do you have a spawn point?

dapper summit Jan 24, 2019, 12:56 AM

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ye

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my game is setup fine i just cant join the hosted session

fringe dove Jan 24, 2019, 12:56 AM

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@dapper summit what exactly do you mean can't join

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you said you did join right? you just didn't spawn

dapper summit Jan 24, 2019, 12:57 AM

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it does nothing when i click join session earlier it did but there was no character and HUD and stuff like that but now i done something and it won't join at all but i just want to join and have a character body

fringe dove Jan 24, 2019, 12:58 AM

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@dapper summit add a breakpoint to the join session node and make sure it is called

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you don't get the 'quick play connection error' printing out right?

dapper summit Jan 24, 2019, 12:59 AM

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no

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now i get a quick play connection error

fringe dove Jan 24, 2019, 1:01 AM

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check the log tab for stuff

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to see if it reported any errors/warnings

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output log, not message log

dapper summit Jan 24, 2019, 1:01 AM

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doesn't there supposed to be anything on the exc pin on success on join session?

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have nothing in output log i think its doing that message for the fun of it lol

fringe dove Jan 24, 2019, 1:05 AM

#

@dapper summit makes sure the length of the search results was at least 1, I don't know if you can get success without there being one result, but it might be that failure means a failure to search and success means a successful search even if it didn't find one

#

though blueprint should have range checking and should have failed in other ways if you accessed an invalid index

dapper summit Jan 24, 2019, 1:06 AM

#

still failed

fringe dove Jan 24, 2019, 1:17 AM

#

@dapper summit you are using null subsystem or steam?

#

and are you sure 'use lan' is on?

#

(if testing on one machine)

dapper summit Jan 24, 2019, 1:18 AM

#

im using lan i have the steam integration but im not using it now

fringe dove Jan 24, 2019, 1:20 AM

#

@dapper summit try the multiplayer shootout demo and make sure the session host/join there works for you, to rule out issues

#

in the learn tab

dapper summit Jan 24, 2019, 1:20 AM

#

alright will do thanks for trying to help me

fringe dove Jan 24, 2019, 1:21 AM

#

you can look at its code too, but it is kind of convoluted at least when I looked a long time ago

#

I didn't know much UI stuff back then though and I think a lot was tied to UMG

potent prairie Jan 24, 2019, 3:16 AM

#

why does the server think this socket on my skeleton is in a different location than the client?

#

creating issues when i spawn/attach to the player

potent prairie Jan 24, 2019, 3:52 AM

#

hmm also the gravity seems to be different on the server. seems to fall quicker than what the client sees, even though its a server-only spawned projectile

#

nvm had to turn on replicates movement as well. all is good in the hood

worthy perch Jan 24, 2019, 4:22 AM

#

@potent prairie Your skeletal mesh animations by default don't change bone transforms when not rendered.

#

GetMesh()->MeshComponentUpdateFlag = EMeshComponentUpdateFlag::AlwaysTickPoseAndRefreshBones;

potent prairie Jan 24, 2019, 5:08 AM

#

ty

meager spade Jan 24, 2019, 5:18 AM

#

is that a big performance hit

#

having the server refreshing bones?

#

surely there is a way to do it without needing to do that on the server?

sharp pagoda Jan 24, 2019, 5:29 AM

#

Erebel and I tried to get instantaneous anim evaluation so that you don't have to always tick the pose on the server, but we never solved the curve interpolation issue. There's a hacky solution of ticking the pose many times during the frame in order to have the pose like 99% interped to the actual pose, but not sure if it's even worth it. @meager spade

#

So yea in theory you don't need to tick the pose at all until you need a socket transform, but it's a bit tricky

meager spade Jan 24, 2019, 5:30 AM

#

sounds it

#

surely in Fortnite they dont have the server ticking the pose

worthy perch Jan 24, 2019, 5:31 AM

#

Is ticking the pose really that expensive?

sharp pagoda Jan 24, 2019, 5:31 AM

#

Oh yea I bet, but it's an endless mystery of how they did it

meager spade Jan 24, 2019, 5:31 AM

#

server ticking 100 clients poses every frame seems to me like a big impact

sharp pagoda Jan 24, 2019, 5:32 AM

#

You could ask erebel if he ever profiled it in his case, I don't remember off the top of my head

worthy perch Jan 24, 2019, 5:32 AM

#

Oh, yeah, I guess it is needless.

sharp pagoda Jan 24, 2019, 5:32 AM

#

Yea it's redundant calculation

meager spade Jan 24, 2019, 5:33 AM

#

https://gyazo.com/9a7be864c31c65535632e599ad23d0ad welp here goes my big commit for the night

Gyazo

sharp pagoda Jan 24, 2019, 5:33 AM

#

Source upload?

meager spade Jan 24, 2019, 5:33 AM

#

yeah

#

think i removed all redundant crap

#

its hard to tell

sharp pagoda Jan 24, 2019, 5:34 AM

#

Make sure you setup your type map properly before you have to go back and fix it all haha

meager spade Jan 24, 2019, 5:34 AM

#

my typemap is ermm

fossil spoke Jan 24, 2019, 5:34 AM

#

Yes do typemap

meager spade Jan 24, 2019, 5:34 AM

#

https://gyazo.com/cec938be8073af3a3e7b8b5d94355985

Gyazo

#

i found it online somewhere

fossil spoke Jan 24, 2019, 5:35 AM

#

I forgot it once. Never again

meager spade Jan 24, 2019, 5:35 AM

#

do you have a typemap i could borrow 😄

sharp pagoda Jan 24, 2019, 5:35 AM

#

I typically make the uproject writable so that you don't have to do the registry garbage with source builds

fossil spoke Jan 24, 2019, 5:35 AM

#

Pretty sure there is a Typemap in the Engine somewhere

meager spade Jan 24, 2019, 5:35 AM

#

i never found one

#

i found a crappy p4 ignore

fossil spoke Jan 24, 2019, 5:36 AM

#

Hmm must be thinking of that

meager spade Jan 24, 2019, 5:36 AM

#

then realised perforce can use gitignore

#

so i used both my custom p4ignore and the engines .gitignore

#

just wondering if i can strip anymore out, like all the crap "setup.bat" installs

#

cause i dont need that in sourcecontrol

#

anyways wrong channel 😄

sharp pagoda Jan 24, 2019, 5:38 AM

#

Use a dir stat to filter out the biggest things you can remove, pointless removing small things like build scripts

meager spade Jan 24, 2019, 5:38 AM

#

wondering if i should upload debug symbols

#

or just leave them out cause there huge

sharp pagoda Jan 24, 2019, 5:39 AM

#

I would, nice for the artists to send you an unwind screenshot

meager spade Jan 24, 2019, 5:39 AM

#

yeah i was kinda thinking to supply them seperatly

#

if needed

#

but i cba, ill just commit this, hopefully my typemap is fine

sharp pagoda Jan 24, 2019, 5:40 AM

#

Looked good for the most part

meager spade Jan 24, 2019, 5:41 AM

#

//Theia/alpha/Engine/Extras/ThirdPartyNotUE/emsdk/Win64/python/2.7.5.3_64bit/Lib/encodings/cp863.py

#

wondering if i should strip ThirdPartyNotUE stuff out

#

think best bet is to compare the git version to mine and remove stuff that isnt in there]

sharp pagoda Jan 24, 2019, 5:42 AM

#

Just measure the file size? No point in removing small things you don't need

meager spade Jan 24, 2019, 5:43 AM

#

true

#

here goes a 30gb upload 111,835 files, the Engine folder has: 145,427 files so its removed a good chunk

plush wave Jan 24, 2019, 8:17 AM

#

How would one do a server check (aka Role == ROLE_AUTHORITY or HasAuthority()) in a UObject?

#

Can you just get outer then do a HasAuthority check?

#

Or do you have to pass in the actor who is doing the executing?

winged badger Jan 24, 2019, 8:24 AM

#

Only actors have net roles

plush wave Jan 24, 2019, 8:24 AM

#

So I'd have to pass in the actor?

winged badger Jan 24, 2019, 8:24 AM

#

There is NetMode as well

plush wave Jan 24, 2019, 8:25 AM

#

NetMode?

winged badger Jan 24, 2019, 8:25 AM

#

Yeah, NM_Standalone NM_Server

#

Dont recall how to usd then off the top of my head

#

But look into the code for IsServer BP node

#

Might be a simpler way to get what you need

plush wave Jan 24, 2019, 8:28 AM

#

Great thank you

#

And you can get NetMode from a UObject?

#

I know there is an AActor::GetNetMode()

thin stratus Jan 24, 2019, 8:37 AM

#

UObjects need get the NetMode of the AActor the are in

plush wave Jan 24, 2019, 8:50 AM

#

Ok great thank you

versed socket Jan 24, 2019, 3:55 PM

#

@fringe dove Thank you for writing that explanation for how to use the Null VOIP. I have done those things, though I haven't tested it without the ?listen trick. I will try making a bare, simple project using Create and Join Session. Hopefully that will be sufficient!

versed socket Jan 24, 2019, 8:29 PM

#

Is using OnRep to replicate a Pawn's desired transform and then lerping to it clientside on Tick basically just how the PawnMovementComponent works? It can't be that simple right?

#

I know that that's basically how the ProjectileMovementComponent works, at least: it replicates start pos, end pos, and travel time then lets everybody play it out for themselves iirc.

fossil spoke Jan 24, 2019, 8:55 PM

#

Check out the pinned messages, i added a Youtube talk about how Halo does Server Authoritative - Client Side predictive actions.

versed socket Jan 25, 2019, 12:38 AM

#

When I was climbing the learning curve for Unreal, one of the supposed "best practices" that I learned was to make heavy use of events and event delegates in Blueprints so as to avoid the mess of boolean checks on Tick and whatnot. However this "prefer OnRep over event replication" practice I've learned recently has really got me looking back and rethinking everything.

For example, a while ago I implemented a weapon in a Multiplayer FPS that would fire itself via an Event call, but this "prefer OnRep" thing makes me think that instead I should be using some kind of bIsShooting variable that will in turn call event functions in its OnRep function. Is this how you guys who are much better than me in general do it in your own things?

meager spade Jan 25, 2019, 12:43 AM

#

@versed socket depends if it has to be a replicated bool from the server

versed socket Jan 25, 2019, 12:47 AM

#

I don't even know anymore. I'm trying to salvage what I thought I knew was the best practice all these years.

worthy perch Jan 25, 2019, 12:15 PM

#

OnRep is primarily for clients to do something when a replicated property changes.

#

It's like a client setter.

#

Or at least how I use it.

supple musk Jan 25, 2019, 12:25 PM

#

I don't see how events and OnReps are incompatible either

worthy perch Jan 25, 2019, 12:26 PM

#

Do you mean compatible?

#

From my understanding, I would say RPCs and OnRep don't really have anything in common.

supple musk Jan 25, 2019, 12:27 PM

#

Oh @versed socket meant RPCs for events ?

worthy perch Jan 25, 2019, 12:28 PM

#

I'm not really sure what he meant.

versed socket Jan 25, 2019, 12:50 PM

#

Here's what I'm referencing: https://youtu.be/mT8VUVuk-CY?t=4093

YouTube

UnrealEngine

Networking in UE4: Server Optimizations | Live Training | Unreal E...

This week we'll be joined by Ryan Gerleve and Dave Ratti to discuss general server optimization in UE4, as well as techniques and solutions to improve your A...

▶ Play video

#

Also in that stream, they talk about how for Fortnite they use OnRep functions that in turn call authority-based events, rather than using multicasted events in general.

#

The reasoning being that an event call can be completely missed without "reliable" checked (which they say is a bad practice to use), but an OnRep function's effects will at least be guaranteed to kick in at some point.

supple musk Jan 25, 2019, 1:23 PM

#

then between a reliable multicast RPC and an onrep, what would be the best ?

#

and why do they use OnRep to authory event ?

#

( i'm at work so can't check the vid but am intrigued )

thin stratus Jan 25, 2019, 1:37 PM

#

Reliable > normal replication

#

Means that if you, for example, call a Reliable RPC on Tick, you'd really fast start to notice problems.

#

E.g. Spawning a Replicated Actor from the Server won't replicate to the Client anymore

#

Or at least only randomly, very delayed

#

The the Reliable calls are prioritized here. Really only use that if need to make sure that the RPC 100% reaches the target.

#

A VFX event for example doesn't need that.

#

If you need a Client to remove the Widget at the Start of the game, then a Reliable Call is valid

#

Cause you really don't want that one to drop.

#

And for Multicast vs RepNotify, it's really simple:

Multicast is a fire and forget event, even with Reliable. While Reliable would make sure that it hits the Target, it doesn't make sure that non-relevant players who get relevant receive this.
This means a Player that joins late or a Player that is far away and comes into relevant distance, will never get the Multicast call fired again (that specific one).
So if you spawn a sound or visual effect via multicast, they won't receive that if they aren't relevant. Which is cool, cause why would they care.
RepNotify on the other hand, while it reaches the same amount of players (so non-relevant people won't be reached), it does fire for people who join late or get relevant.
Because the variable that its bound to will replicate for these people. So if you need something to update when people get relevant, you use the RepNotify.
An example would be the state of a door. Is it open or closed? You don't want to open the door via Multicast, cause then it stays closed for people who get relevant later.

#

@versed socket @worthy perch @supple musk Does that clear things up?

supple musk Jan 25, 2019, 1:44 PM

#

👏

#

yeah really got the point

thin stratus Jan 25, 2019, 1:45 PM

#

To give you an answer to that bIsShooting thing, ask yourself the same question:

Does a Player need to know about this when they come into relevatn distance?

supple musk Jan 25, 2019, 1:45 PM

#

In Fortnite it is indeed quite useful because players are so far from each others

thin stratus Jan 25, 2019, 1:45 PM

#

Well if you set bIsShooting to true once and the the player can shoot for 5 seconds before they stop and you set it back to false, then def use a RepNotify

#

Cause otherwise, people who get relevant won't know they a shooting

#

If you however (for whatever reason), replicate the shooting event every time the player shoots, a Multicast is fine.

#

Cause the shots that are in the past aren't relevant for us anymore

#

So you could also say that StateChanges should be RepNotify, while one time events can be Multicast

#

But well

#

Or rather RPC, you can of course also target a single client with a RepNotify

jade gazelle Jan 25, 2019, 2:04 PM

#

I’m not sure I understand why they would say Reliable RPCs are bad practice. Isn’t that pretty much the only way to send data from client —> server? Even if you put an authoritative event in OnRep like they said it still could drop if it wasn’t marked reliable.

#

W/o reliable there is no guarantee that the event will actually happen, which often is necessary

#

Obviously not for vfx or sound but for gameplay events

thin stratus Jan 25, 2019, 2:12 PM

#

If it's necessary, of course use it

#

But it really isn't that often needed

jade gazelle Jan 25, 2019, 2:13 PM

#

That’s kind of what I figured. Maybe they are just trying to make sure people don’t just automatically check mark Reliable for every RPC they create

#

One thing I was wondering about the other day is with OnRep, in C++ the server does not call the function, only clients. In BP both server and clients do apparently

#

If you nativized a BP with OnRep server functionality would that be broken in the conversion to C++?

thin stratus Jan 25, 2019, 2:15 PM

#

Don't know

#

Shouldn't though

#

And yes, Server doesn't call in C++

#

You need to manually call it

jade gazelle Jan 25, 2019, 2:15 PM

#

Seems weird that they would have it function differently rather than consistently

#

Will just have to test it

thin stratus Jan 25, 2019, 2:35 PM

#

Blueprints aren't working that way

#

They always try to make things easier for bp users

jolly siren Jan 25, 2019, 4:49 PM

#

Has anyone ran into an issue where NetServerMaxTickRate doesn't work? Our server tick rate isn't capping correctly and is going rampant.

#

@graceful cave I see that you had a similar issue a while back?

#

Ah your issue was with listen servers tho, yeah you need to set bClampListenServerTickRate=true for that to work.

#

But I'm dealing with dedicated servers here

graceful cave Jan 25, 2019, 5:01 PM

#

what issue are you having?

#

i have it working fine with dedicated

jolly siren Jan 25, 2019, 5:02 PM

#

Our dedicated server tick rate isn't getting capped at NetServerMaxTickRate for some reason

graceful cave Jan 25, 2019, 5:02 PM

#

so serverside delta seconds is going over it?

#

i have mine set in Saved\Config\WindowsServer\Engine.ini in a packaged game

#

NetServerMaxTickRate=60```

#

and it works as expected

jolly siren Jan 25, 2019, 5:04 PM

#

server side fps is going over it yes. We have ours set in DefaultEngine.ini

graceful cave Jan 25, 2019, 5:06 PM

#

try setting it the location i have mine set and see if its still an issue

jolly siren Jan 25, 2019, 5:07 PM

#

okay, I noticed that dedicated server frame rate isn't capping when testing from the editor either tho

graceful cave Jan 25, 2019, 5:08 PM

#

if youre running with Run Dedicated Server checked then it just runs the framerate in your viewport

jolly siren Jan 25, 2019, 5:08 PM

#

I am, but I am doing this in gamemode

#

UE_LOG(LogTemp, Warning, TEXT("FPS: %d"), (int32)GAverageFPS);

graceful cave Jan 25, 2019, 5:09 PM

#

i dont think net driver exists in PIE at all so net server max tick rate wont have any effect

#

as far as i know theres no way to test it outside of a packaged game

quaint stump Jan 25, 2019, 5:10 PM

#

Hi guys, i have a problem with my multiplayer game. When the server change map with console command "servertravel", the client is travelled in new map, but if another client search session(find session) in new map ,he see the empty server list. Anyone can help me? thanks so much in advance.

jolly siren Jan 25, 2019, 5:23 PM

#

@graceful cave Do you disable smoothing for dedicated servers too?

graceful cave Jan 25, 2019, 5:29 PM

#

i dont think ive adjusted that setting

jolly siren Jan 25, 2019, 5:29 PM

#

okay

graceful cave Jan 25, 2019, 5:30 PM

#

how far above your configured tick rate is the actual frame rate going?

chrome bay Jan 25, 2019, 5:31 PM

#

In PIE I don't think dedicated servers respect the max tick rate

#

Has to be packaged up

graceful cave Jan 25, 2019, 5:31 PM

#

they dont, net driver just returns nullptr if you try to access it in PIE

chrome bay Jan 25, 2019, 5:32 PM

#

net driver should still exist IIRC

#

likely follows a different path though

graceful cave Jan 25, 2019, 5:33 PM

#

@jolly siren when you launch a packaged dedicated server with the log showing, does it print the tick rate anywhere?

#

when levels load like this

📎 unknown.png

jolly siren Jan 25, 2019, 5:35 PM

#

I'll check the logs on the dedicated server. I found a udn post that says t.maxFPS overrides NetServerMaxTickRate. However, I don't set that directly and am using GameUserSettings to set max fps.

#

https://udn.unrealengine.com/questions/298361/view.html

#

I'm not sure how high the tick rate is going on the dedicated servers yet. I found this issue because our MaxInternetClientRate is hitting the cap of 15KB/s sometimes

jolly siren Jan 25, 2019, 6:44 PM

#

Does anyone know where dedicated server logs go on Linux for shipping builds?

#

I know they go to C:\Users\UserName\AppData\Local\GameName for windows

#

(when using bUseLoggingInShipping = true)

meager spade Jan 25, 2019, 7:21 PM

#

check your . folders

#

ls -l .*

#

or ls -la

jolly siren Jan 25, 2019, 7:25 PM

#

.config/Epic probably?

#

I don't have it packaged to check yet

#

Do you know if it will take -LOG="path" into account when using bUseLoggingInShipping?

fringe dove Jan 25, 2019, 7:53 PM

#

@jolly siren mine go in: ~/LinuxServer/GameName/Saved/Logs

#

where LinuxServer is the full packaged folder copied over

jolly siren Jan 25, 2019, 7:53 PM

#

For shipping builds?

fringe dove Jan 25, 2019, 7:53 PM

#

yeah it is a shipping build

jolly siren Jan 25, 2019, 7:54 PM

#

oh okay cool, wasn't expecting that

#

windows puts it in appdata

fringe dove Jan 25, 2019, 7:55 PM

#

@jolly siren I'm launching it through the script they include after packaging (~/LinuxServer/GameName.sh)

jolly siren Jan 25, 2019, 7:55 PM

#

With -log?

#

And not specifying a path?

fringe dove Jan 25, 2019, 7:55 PM

#

nope, and looking at it the script doesn't seem to be doing anything special wrt logs

#

I have bUseLoggingInShipping

jolly siren Jan 25, 2019, 8:10 PM

#

Okay awesome, well that is the best case scenario so hopefully we get that too

worthy perch Jan 25, 2019, 8:12 PM

#

So, quick question. What can I do to reduce the bandwidth cost of ReplicatedMovement, particularly that from CharacterMovementComponent?

#

On AI characters, they have a NetUpdateFrequency of 5 - 10, and I think it's eating my bandwidth. It really limits the number of AI actors I can have.

quaint stump Jan 25, 2019, 8:23 PM

#

You can increase the net update frequency (100 is the default value) of the actor or set it to dormant if it stay some times without moving.

worthy perch Jan 25, 2019, 8:23 PM

#

Wouldn't increasing net update frequency increase the bandwidth?

#

And in this case, they're always moving.

quaint stump Jan 25, 2019, 8:26 PM

#

you are right, sorry, the NetUpdateFrequency is the number of replication per second apparently

#

Does anyone already had issues to find a session after this session did a ServerTravel? I can only find sessions who didn't change map.
I'm using a listen server.

📎 Capture.PNG

#

Find session return an empty structure if a client do a FindSession after the server did a Travel

jolly siren Jan 25, 2019, 9:26 PM

#

Is it normal for clientside up/down bandwidth to increase as client frame rate increases?

ebon bramble Jan 25, 2019, 10:35 PM

#

howdy .. i have a question

#

oh nvm already figured it out lol

crystal crag Jan 25, 2019, 11:13 PM

#

Has anyone here ever tried to get the ActionRPG template to work w/ a dedicated server?

#

I feel like I am really close to getting there. I could find out later I am way off, but I only have a couple of visible issues

#

The major one right now is the enemy characters are jittering. Does anyone know what I could start to look for? I have Always tick and refresh bones enabled on the mesh

#

📎 2019-01-25_17-27-04_3.mp4

#

This is a small clip of what I am talking about

twin juniper Jan 26, 2019, 1:00 AM

#

there a way to have an actor be NOT relevant to owner? like reverse of the OnlyRelevantToOwner checkbox being NotReleventToOwner ?

winged badger Jan 26, 2019, 1:03 AM

#

there is no sense in having a replicated actor that has an owner and is not relevant to it

#

overriding AActor::IsNetRelevantFor can do it tho

twin juniper Jan 26, 2019, 1:22 AM

#

thanks! dont know if its the right way but it does exactly what im looking for

#

i have owning client fire off weapon projectile locally, then tell the server to fire projectile too. server spawns replicated projectile so remote clients know about it

but owner was receiving this too, so double projectile on owner screen

#

i cant do repnotify and have remoteclients shoot their own projectile because the origin of the projectile (weapon) tends to be out of replication range, very far away outside of net distance

twin juniper Jan 26, 2019, 1:46 AM

#

i guess another solution is somehow owning clients copy of the projectile will sync up or be taken over by server's copy of projectile.. have no idea where to even begin with that 😆

halcyon abyss Jan 26, 2019, 2:15 AM

#

hey guys, when a controller logs out... the pawn is destroyed immediately... Where is this happening?

halcyon abyss Jan 26, 2019, 2:38 AM

#

does anyone know?

icy nacelle Jan 26, 2019, 2:47 AM

#

I'm having some issues with an SQLite database I'm trying to save/load with.

Essentially I'm trying to decide where to hold the load and save functions. I'm saving/loading variables in the controller, player state and player character. These variables are changed on the server, the player 'knows' each variable when it comes to saving to the database.

Normally, I'd handle the save/load in the game mode, where I can store the database, HOWEVER - as you know the client can't access the game mode. How should I handle this? Should I do an event that runs on the server and calls the save/load from there?

Apologies if this doesn't make much sense, I'm having a hard time understanding this.

twin juniper Jan 26, 2019, 3:00 AM

#

Hey all

#

I've got a dedicated server build running, and it's all showing up in the LAN steam server browser

#

but even with the ports forwarded, it refuses to show up in the steam internet tab

#

I also can't connect via a remote machine using Open ip or Open ip:port

#

Does anyone have any tips or can they shed some light? Engine v4.21.1 - Built from source. Using Advanced Sessions

#

📎 unknown.png

meager spade Jan 26, 2019, 3:06 AM

#

might be a odd answer but you enabled port forwarding so it can reach the outside world ?

twin juniper Jan 26, 2019, 3:08 AM

#

Yes of course - Also tried running via my windows dedicated server (open ports, firewall disabled)

#

That's one of the first things I looked at

#

I did find this thread, and followed all the advice on it to no avail https://forums.unrealengine.com/development-discussion/c-gameplay-programming/69281-dedicated-server-with-steam-is-a-joke

Unreal Engine Forums

For gameplay programmers writing C++ code.

sharp pagoda Jan 26, 2019, 3:09 AM

#

We had that issue for a while too, I can't remember if we ever got the server to be listed for more than a few seconds before being taken off the list, but we could still search/join from the steam master list and connect directly through open steam.thesteamidlistedinthelansection

#

It's some strange behavior with the advertising system

twin juniper Jan 26, 2019, 3:09 AM

#

So find session still worked for you?

sharp pagoda Jan 26, 2019, 3:09 AM

#

At the end of the day it never caused any issues, as everything still worked despite it not showing up

meager spade Jan 26, 2019, 3:10 AM

#

think im going to be alright as mine is a matchmaking based game, not a dedicated list

sharp pagoda Jan 26, 2019, 3:10 AM

#

If you set everything up and opened your firewall you can find session or open steam.901229435537397777

#

You can't directly join via IP, as the steam subsys expects an id instead of an ipv4 address

twin juniper Jan 26, 2019, 3:12 AM

#

🤔 Okay, I'll check it out

sharp pagoda Jan 26, 2019, 3:12 AM

#

You can have your own server list, it works fine, it's just the actual steam client browser is strange with advertising

twin juniper Jan 26, 2019, 3:14 AM

#

10-4, looking into it now, quickly wrote a condition to connect to the first server it finds (which should only be my dev server)

#

Yeah, open steam.id isn't working either

#

😦

sharp pagoda Jan 26, 2019, 3:20 AM

#

You typed in the id listed in the LAN section of the client browser?

twin juniper Jan 26, 2019, 3:21 AM

#

Yeah

sharp pagoda Jan 26, 2019, 3:21 AM

#

What does the dedi log?

twin juniper Jan 26, 2019, 3:21 AM

#

2 seconds

#

Hang on

#

that's not the full log

#

@sharp pagoda https://pastebin.com/kUdrzPX8

Pastebin

LogInit: Build: ++UE4+Release-4.21-CL-0 LogInit: Engine Version: ...

sharp pagoda Jan 26, 2019, 3:24 AM

#

Is that log taken after the player tried to connect?

twin juniper Jan 26, 2019, 3:25 AM

#

Yes

sharp pagoda Jan 26, 2019, 3:27 AM

#

So it's not even getting on the public internet, otherwise you'd have some logging from the net driver either accepting or refusing the connection attempt

#

Are you absolutely sure you forwarded 27015 and 27016 as well as allowed the dedi server through the windows firewall?

#

Might as well do udp and tcp to be safe

twin juniper Jan 26, 2019, 3:28 AM

#

This is the client log btw

#

https://pastebin.com/6HvKj3gB

Pastebin

LogNet: Browse: steam.90122943833724933//Game/Maps/ThirdPersonExam...

#

1000% the ports are open, as I've tested another known working game server on the same ports

#

I'll check again to be safe

sharp pagoda Jan 26, 2019, 3:29 AM

#

" GetAddressInfo failed to resolve host with error SE_HOST_NOT_FOUND" is the offending message here

#

GetAddressInfo is a winsock level function that's telling you that it literally could not find your server on the public internet

twin juniper Jan 26, 2019, 3:30 AM

#

Yeah, the ports are open :sigh:

sharp pagoda Jan 26, 2019, 3:30 AM

#

Is this server housed in a virtual machine?

twin juniper Jan 26, 2019, 3:30 AM

#

No

#

LogNet: UChannel::CleanUp: ChIndex == 0. Closing connection. [UChannel] ChIndex: 0, Closing: 0 [UNetConnection] RemoteAddr: 0.0.0.0:7777, Name: IpConnection_7, Driver: PendingNetDriver IpNetDriver_7, IsServer: NO, PC: NULL, Owner: NULL, UniqueId: INVALID
LogNet: UNetConnection::PendingConnectionLost. [UNetConnection] RemoteAddr: 0.0.0.0:7777, Name: None, Driver: PendingNetDriver None, IsServer: YES, PC: NULL, Owner: NULL, UniqueId: INVALID bPendingDestroy=0```

#

I noticed this?

#

0:0:0:0:7777

sharp pagoda Jan 26, 2019, 3:31 AM

#

Yea I would imagine the unetconnection was just fed a null ipv4 when the host lookup failed

twin juniper Jan 26, 2019, 3:31 AM

#

nevermind, that's after the connection failed

sharp pagoda Jan 26, 2019, 3:32 AM

#

Does your local steam client download region match the server's steam client download region?

twin juniper Jan 26, 2019, 3:33 AM

#

I'm assuming yes

#

as the server is in my office 20 miles away

raven holly Jan 26, 2019, 3:33 AM

#

is there a way to run two dedis with steam OSS? on 7777 and 7778? Failed to initialize Steam, this could be due to a Steam server and client running on the same machine.

sharp pagoda Jan 26, 2019, 3:34 AM

#

99% sure you can't

twin juniper Jan 26, 2019, 3:34 AM

#

I'm going to upload a fresh build to the dedi to just double check

#

😦

#

Kinda at a loss for idea's at this point

sharp pagoda Jan 26, 2019, 3:35 AM

#

You would get the net error indicating a version mismatch if that was an issue

twin juniper Jan 26, 2019, 3:35 AM

#

Right

sharp pagoda Jan 26, 2019, 3:35 AM

#

The problem is the server never even sees the connection attempt

twin juniper Jan 26, 2019, 3:35 AM

#

It's as if steam isn't even getting a request to list it or something

sharp pagoda Jan 26, 2019, 3:35 AM

#

The client isn't able to resolve the actual server address when talking to the steam master server

#

Uh idea

#

Show me your server init function

#

I remember there's a snippet you need in there for dedis

twin juniper Jan 26, 2019, 3:36 AM

#

The blueprint or c?

sharp pagoda Jan 26, 2019, 3:36 AM

#

c only, one sec I'll show you what I mean

twin juniper Jan 26, 2019, 3:36 AM

#

Okay 👍

sharp pagoda Jan 26, 2019, 3:37 AM

#

Or wait you're using advanced sessions right?

twin juniper Jan 26, 2019, 3:37 AM

#

Yeah

sharp pagoda Jan 26, 2019, 3:38 AM

#

RegisterServer()

#

that's what I was thinking of

twin juniper Jan 26, 2019, 3:38 AM

#

GameSession::RegisterServer()

#

right?

sharp pagoda Jan 26, 2019, 3:39 AM

#

📎 unknown.png

#

That's what we use

#

Game session yes

twin juniper Jan 26, 2019, 3:39 AM

#

Hang tight, gotta find it again

#

I only found this


void AGameSession::RegisterServer()
{
}```

#

inside GameSession.cpp

sharp pagoda Jan 26, 2019, 3:40 AM

#

Yea I believe that's the culprit

twin juniper Jan 26, 2019, 3:41 AM

#

Alright

#

Is there any documentation on this anywhere?

#

I'm not finding much of anything with a google search or forum search

sharp pagoda Jan 26, 2019, 3:43 AM

#

I was pointed to it somewhere, cannot for the life of me find it now

#

Both of the dedi server guides on the wiki don't mention it 🤔

twin juniper Jan 26, 2019, 3:44 AM

#

Yeah, that's where I looked first lol

sharp pagoda Jan 26, 2019, 3:44 AM

#

📎 unknown.png

#

That's the best you'll get haha

twin juniper Jan 26, 2019, 3:44 AM

#

What file do you have it in?

sharp pagoda Jan 26, 2019, 3:44 AM

#

<Prefix>GameSession.h/cpp

#

📎 unknown.png

#

I think that's where I found it

twin juniper Jan 26, 2019, 3:47 AM

#

The only place I have it is in my actual engine source

#

which I'd rather not modify

sharp pagoda Jan 26, 2019, 3:47 AM

#

Just make a child class of agamesession?

#

No need to mod the engine for this

twin juniper Jan 26, 2019, 3:48 AM

#

Ahh - i just read that Advanced Sessions should auto-run the needed registerServer stuff once the map is changed after the session is created

#

I'm such a noob when it comes to C++ and unreal, I have no idea where to even begin to add the child class for AGameSession @sharp pagoda

sharp pagoda Jan 26, 2019, 3:52 AM

#

📎 unknown.png

#

📎 unknown.png

twin juniper Jan 26, 2019, 3:53 AM

#

🙏 You are a godsend to be honest

sharp pagoda Jan 26, 2019, 3:53 AM

#

And in your game mode

📎 unknown.png

twin juniper Jan 26, 2019, 3:56 AM

#

Alright, I'm calling it for the night

#

I'll try this in the morning I suppose

#

Don't understand why dedicated server builds are so complicated

#

Or why there isn't a good tutorial out yet

red sand Jan 26, 2019, 1:42 PM

#

Is it compulsory to have source-build of UE4 to use Dedicated server?

worthy perch Jan 26, 2019, 1:58 PM

#

At least in 4.19.2, without the source version, you can't build for Server target.

red sand Jan 26, 2019, 2:04 PM

#

same problem in 4.21.3 as well, can't build server target without source-build

spiral saffron Jan 26, 2019, 2:12 PM

#

Hi everyone! Need help on server package. Following this tutorial https://wiki.unrealengine.com/Dedicated_Server_Guide_(Windows_%26_Linux) from @worn nymph . Got stuck on packaging project on Win64. UBT says: "UATHelper: Packaging (Windows (64-bit)): ERROR: No target name was specified on the command-line." Need to say that every step before was made as in tutorial and everything was good before that point. I would appreciate any help.

Dedicated_Server_Guide_(Windows_%26_Linux)

#

@red sand , regarding your question: I believe there is no way to build Dedicated Server without source from git

worthy perch Jan 26, 2019, 2:23 PM

#

@spiral saffron , Maybe this: https://answers.unrealengine.com/questions/709222/no-32-bit-compiler-toolchain-found-2.html

#

Or this? https://answers.unrealengine.com/questions/798832/packaging-problem-source-file-error.html

spiral saffron Jan 26, 2019, 2:41 PM

#

@worthy perch thanks for help! First link looks like what I need. But in new VS Installer I haven't found exact match of modules in post. I'll try find something similar.

worthy perch Jan 26, 2019, 2:43 PM

#

I have my doubts if the first link is the solution to your problem, now that I think about it. Well, hopefully it works, tell me if it does.

spiral saffron Jan 26, 2019, 2:43 PM

#

👌

#

@worthy perch Nope. Probably, the problem is somewhere else

worthy perch Jan 26, 2019, 2:59 PM

#

Hmm, maybe ask in #packaging if you haven't already.

spiral saffron Jan 26, 2019, 3:02 PM

#

thanks, I'll try

nocturne berry Jan 26, 2019, 5:02 PM

#

hey guys, does anyone know when the dedicated server assigns a port? and if there is a callback which i could listen to to know when i can start fetching it?
I need it to send it to gamelift.
I'm trying to catch it in the GameInstance's Init, i tried to log it and it returns 0, and i checked the log and it seems that the port is assigned after my log

thin stratus Jan 26, 2019, 5:28 PM

#

@nocturne berry Pretty sure you can get it from the world in the ProcessReady function

#

Haven't touch the implementation in ages, but this here was what I did like 2(?) years ago:

FProcessParameters* Params = new FProcessParameters();
Params->port = GetWorld()->URL.Port;

#

That's called in ProcessReady, after InitSDK()

#

Which is called from GameInstance::Init

#

So that should work

nocturne berry Jan 26, 2019, 5:31 PM

#

yes that's where i'm trying to assign the port for the ProcessReady, but locally it is returning 0

thin stratus Jan 26, 2019, 5:31 PM

#

Even the GetWorld() one?

#

Hm

#

That was working though iirc.

nocturne berry Jan 26, 2019, 5:31 PM

#

let me double check this

#

and i'll get back

nocturne berry Jan 26, 2019, 5:47 PM

#

@thin stratus just tried this GetWorld()->URL.Port;, now i remembered that the problem with it is that it always returns 7777

📎 Capture.PNG

thin stratus Jan 26, 2019, 5:48 PM

#

Hm

nocturne berry Jan 26, 2019, 5:48 PM

#

that's why i was trying to see when is the port actually getting assigned to the server, so that i can then catch it and initialize the ProcessReady

thin stratus Jan 26, 2019, 5:49 PM

#

Yeah I recall having that issue too

#

But not for Gamelift

#

I think that was when I had my own MasterServer

#

But I don't have the code at hand anymore

nocturne berry Jan 26, 2019, 5:49 PM

#

:/

thin stratus Jan 26, 2019, 5:50 PM

#

How are you changing the port to 7778, by hand or ue4 automatic?

nocturne berry Jan 26, 2019, 5:50 PM

#

ue4 automatic

thin stratus Jan 26, 2019, 6:10 PM

#

@nocturne berry Okay so

#

The log with the 7778 is posted in InitListen iirc

#

That happens in the Listen Function of the World

#

That is called in the LoadMap function of the "UnrealEngine" (the GEngine stuff) class

#

Which technically means

#

That instead of Init of the GameInstance

#

You could do it in the PostLoad of the Map

#

Which you can listen to with this FCoreUObjectDelegates::PostLoadMapWithWorld

#

That's all I can give you atm

nocturne berry Jan 26, 2019, 6:13 PM

#

thank you! i shall try that and report back
i really appreciate you taking the time to help

thin stratus Jan 26, 2019, 6:16 PM

#

I think I actually did this in the GameModeBeginPlay

#

For that very reason

#

Or something like that

nocturne berry Jan 26, 2019, 6:18 PM

#

yea i think that's a good place to listen for the port

knotty frost Jan 26, 2019, 6:42 PM

#

has anyone else ran into this crash? Assertion failed: State == Handler::State::InitializingComponents

#

PacketHandler.cpp line 587

twin juniper Jan 26, 2019, 7:25 PM

#

does someone implemented a master server

#

succesfully?

thin stratus Jan 26, 2019, 7:49 PM

#

Yop

twin juniper Jan 26, 2019, 7:58 PM

#

how ?

bitter oriole Jan 26, 2019, 7:59 PM

#

I did that too in Python some years ago

thin stratus Jan 26, 2019, 7:59 PM

#

Think my last one was in c#

#

Might make one with NodeJS

bitter oriole Jan 26, 2019, 7:59 PM

#

When Steam didn't exist :3

twin juniper Jan 26, 2019, 8:00 PM

#

i found an plugin for master server in python

#

for unreal

#

but i am not sure if i can make the dedicated server to register

#

into master server

#

with blueprints

thin stratus Jan 26, 2019, 8:01 PM

#

Most likely not with BPs

#

Maybe with an HTTP Plugin

bitter oriole Jan 26, 2019, 8:02 PM

#

If writing a few thousand lines of C++ is a problem, forget about master servers and use Steam

knotty frost Jan 26, 2019, 8:02 PM

#

@thin stratus Did you just extend OnlineSubsystemNull as a base and redo the matchmaking? I need to work on a custom OSS soon

twin juniper Jan 26, 2019, 8:02 PM

#

a no writing c++ lines is not a problem

#

dude

#

compiling c++ is a problem

thin stratus Jan 26, 2019, 8:02 PM

#

No, I just wrote my own MasterServer and in the GI of the Server I managed the sending of the data to the server and the heartbeat

twin juniper Jan 26, 2019, 8:02 PM

#

i don't have any problem with c++

knotty frost Jan 26, 2019, 8:03 PM

#

I was thinking of keeping it flexible and fairly simple, a containerized, load-balanced kubernetes matchmaking and profile service over https i can deploy somewhere that'll scale

#

having lots of annoying issues with Steam matchmaking recently with some users/regions

twin juniper Jan 26, 2019, 8:04 PM

#

i want to user the steam subsystem just for the steam ids

#

but not for the sessions

thin stratus Jan 26, 2019, 8:04 PM

#

It was really just for a simple MasterServer with list

#

MasterServer has Database

#

Dedi register and send heartbeat iirc

#

And Clients as MasterServer for the list

#

¯_(ツ)_/¯

twin juniper Jan 26, 2019, 8:04 PM

#

i am thinking to make an api in php

#

for the master server

bitter oriole Jan 26, 2019, 8:05 PM

#

Why not Steam for everything

twin juniper Jan 26, 2019, 8:05 PM

#

do you mean to use the steam master server?

bitter oriole Jan 26, 2019, 8:06 PM

#

The Steam matchmaking infrastructure yes

knotty frost Jan 26, 2019, 8:06 PM

#

@bitter oriole Platform lock-in for the most part, rare issues with some clients you will run into if successful as well

bitter oriole Jan 26, 2019, 8:06 PM

#

Oh I wasn't asking you

twin juniper Jan 26, 2019, 8:06 PM

#

yeah but already build an dedicated server

knotty frost Jan 26, 2019, 8:06 PM

#

ah sorry

twin juniper Jan 26, 2019, 8:06 PM

#

so why to change to sessions

#

?

bitter oriole Jan 26, 2019, 8:06 PM

#

That's unrelated

#

Dedicated is just an optimization / security measure

#

Sessions are matchmaking

#

You can have each without the other

twin juniper Jan 26, 2019, 8:07 PM

#

so i can use the dedicated server to create a session

#

?

thin stratus Jan 26, 2019, 8:07 PM

#

Of course lol

knotty frost Jan 26, 2019, 8:07 PM

#

GameSession::RegisterServer

twin juniper Jan 26, 2019, 8:07 PM

#

and i can search the sessions instead to make a master server

#

hmm

knotty frost Jan 26, 2019, 8:08 PM

#

you'd override that function, and register the server with your master server

thin stratus Jan 26, 2019, 8:08 PM

#

it's the same as having a listenServer

#

Just without a client attached to it

bitter oriole Jan 26, 2019, 8:08 PM

#

TBH I wouldn't touch dedicated servers with a 10-feet pole if these things are new to you, but that's just me... 😃

#

No offense

twin juniper Jan 26, 2019, 8:08 PM

#

why?

knotty frost Jan 26, 2019, 8:09 PM

#

IMO architecting for a dedicated server is easier than a listen server but it totally depends on the game you are creating

bitter oriole Jan 26, 2019, 8:10 PM

#

Simple reason : you don't need dedicated servers unless you want either a competitive game where players will cheat, or high player counts

#

Both are very bad ideas for beginners or solo devs

twin juniper Jan 26, 2019, 8:10 PM

#

i want player to cheat

#

dude

#

players*

worthy perch Jan 26, 2019, 8:10 PM

#

You want players to cheat?

twin juniper Jan 26, 2019, 8:11 PM

#

yeap

worthy perch Jan 26, 2019, 8:11 PM

#

Uhh, alright... well, that might be a little difficult for them if you use a dedicated server.

bitter oriole Jan 26, 2019, 8:12 PM

#

The advice I generally give to single developers like me is to avoid competitive, matchmaking, and more than 4-5 players

thin stratus Jan 26, 2019, 8:12 PM

#

Yeah the hosting costs for competetive and matchmaking is insane

#

If you don't have a few thousands just to spare for that, forget it

twin juniper Jan 26, 2019, 8:13 PM

#

i want to make like a "simple survival"

#

and i want an pc to host the server

thin stratus Jan 26, 2019, 8:13 PM

#

Then use ListenServers

twin juniper Jan 26, 2019, 8:13 PM

#

that i want to use dedicated

thin stratus Jan 26, 2019, 8:13 PM

#

Well then use DedicatedServers

#

¯_(ツ)_/¯

worthy perch Jan 26, 2019, 8:13 PM

#

On the subject, can I get a quick idea of how to calculate the cost of running dedicated servers?

twin juniper Jan 26, 2019, 8:14 PM

#

the AWS are a solution for dedicated servers?

thin stratus Jan 26, 2019, 8:14 PM

#

Go to the service provider page

#

Check the costs of the instance

knotty frost Jan 26, 2019, 8:14 PM

#

hosting costs are pretty insane yeah...and if you are supporting more than 16 players you can forget the cloud services

thin stratus Jan 26, 2019, 8:14 PM

#

Check what you servers take (e.g. x servers per isntance)

#

Scale up

worthy perch Jan 26, 2019, 8:14 PM

#

Alright, I'll check there again. I couldn't really understand the pricing.

knotty frost Jan 26, 2019, 8:14 PM

#

AWS - c5.xlarge = ~$200/m , 3.0GHz max core speed, single core

thin stratus Jan 26, 2019, 8:15 PM

#

Def take linux

#

Never Windows instances

worthy perch Jan 26, 2019, 8:15 PM

#

I saw those numbers, but I didn't understand how those scale with internet usage.

twin juniper Jan 26, 2019, 8:15 PM

#

yeah linux

knotty frost Jan 26, 2019, 8:15 PM

#

how is unreal running on linux cpu wise these days? it wasn't running well at all in 4.17-4.18

bitter oriole Jan 26, 2019, 8:15 PM

#

To be fair, you can count on one hand the solo devs who have 10 online players at one time after launch week.

twin juniper Jan 26, 2019, 8:15 PM

#

i think they need windows licenses for windows server

#

and that add some cost

worthy perch Jan 26, 2019, 8:16 PM

#

You don't need to buy the licenses.

thin stratus Jan 26, 2019, 8:16 PM

#

@worthy perch It's time it runs

#

Times the money

#

If you need one instance that costs x € per month

twin juniper Jan 26, 2019, 8:16 PM

#

i know that i am idiot, this should return true if the level is on the dedicated server?

📎 unknown.png

knotty frost Jan 26, 2019, 8:16 PM

#

you rent the windows licenses with cloud providers, usually an extra $10-30/m

worthy perch Jan 26, 2019, 8:16 PM

#

So bandwidth doesn't matter at all?

thin stratus Jan 26, 2019, 8:16 PM

#

For 20 game instances

#

Doubt, as you want to hold that low anyway cause of lag

twin juniper Jan 26, 2019, 8:17 PM

#

an idea is to open the dedicated server for community

worthy perch Jan 26, 2019, 8:17 PM

#

Huh, thank you.

twin juniper Jan 26, 2019, 8:17 PM

#

and you host some official server

#

and the community the other server

knotty frost Jan 26, 2019, 8:17 PM

#

if your game can do that, that is the best route for costs

thin stratus Jan 26, 2019, 8:17 PM

#

Yes it returns true

#

You can share the DedicatedServer files

#

Then they can start their own

twin juniper Jan 26, 2019, 8:18 PM

#

this could run a dedicated server?

📎 unknown.png

#

like 50 player slots

#

?

knotty frost Jan 26, 2019, 8:18 PM

#

yep

#

E3-1230v6 has supported over 100 players without much strain for one of my projects but it depends on your code optimization

thin stratus Jan 26, 2019, 8:20 PM

#

Yop

twin juniper Jan 26, 2019, 8:20 PM

#

?

#

this should work for a dedicated

📎 unknown.png

thin stratus Jan 26, 2019, 8:20 PM

#

Yeah you can do that in BPs

#

But not presence

#

DedicatedSErvers don't use that

twin juniper Jan 26, 2019, 8:20 PM

#

some docs for presence

#

?

#

forget

#

is for listen server

#

does the anti cheat do something

#

?

bitter oriole Jan 26, 2019, 8:23 PM

#

There is no anti cheat

twin juniper Jan 26, 2019, 8:24 PM

#

so the ant cheat protected box is doing nothing

#

anti*

bitter oriole Jan 26, 2019, 8:24 PM

#

What box ?

#

Ah, that might be a Steam thing

twin juniper Jan 26, 2019, 8:24 PM

#

vac?

bitter oriole Jan 26, 2019, 8:25 PM

#

Probabky

#

No idea how that works as a dev though

knotty frost Jan 26, 2019, 8:26 PM

#

you turn it on, and steam + ue4 takes care of the rest

#

it's pretty much just a checkbox on the partner page

bitter oriole Jan 26, 2019, 8:26 PM

#

Nice

knotty frost Jan 26, 2019, 8:26 PM

#

as to how effective it is...thats another story lol

twin juniper Jan 26, 2019, 8:26 PM

#

yeah but if the dedicated is on an linux

#

i need to install steam for the dedicated

#

or i am idiot

#

?

knotty frost Jan 26, 2019, 8:27 PM

#

UE4 will package the steam dependencies your server needs during the packaging process

twin juniper Jan 26, 2019, 8:27 PM

#

that explains

knotty frost Jan 26, 2019, 8:27 PM

#

there are some edits you need to make to the engine for it all to work correctly though

twin juniper Jan 26, 2019, 8:28 PM

#

what do you mean

#

?

knotty frost Jan 26, 2019, 8:28 PM

#

you'll need to change some settings near the top of OnlineSessionAsyncServerSteam.cpp at the very least

twin juniper Jan 26, 2019, 8:29 PM

#

and i think i need to rebuild the engine

#

again

knotty frost Jan 26, 2019, 8:29 PM

#

nah just the game targeting the engine, it'll selectively rebuild what changed, no need to do a full rebuild

twin juniper Jan 26, 2019, 8:30 PM

#

ok

#

first i am trying to build again a dedicated server

#

and see after what is happening

twin juniper Jan 26, 2019, 10:11 PM

#

📎 unknown.png

#

so it worked

#

the dedicated create the session without a problem

#

and i didn't change but i am not sure that i can find the session

worthy perch Jan 27, 2019, 1:09 AM

#

You sure your client actually connected/didn't disconnect?

glacial pollen Jan 27, 2019, 1:21 AM

#

Okay, thanks for the tip
I see that my client is logging out. Why is that?

glacial pollen Jan 27, 2019, 1:41 AM

#

I got the dedicated server to stay as Dedicated by using ?listen

#

however the client still logs out right after calling Level Load

worthy perch Jan 27, 2019, 1:48 AM

#

In PIE? If so, don't do PIE.

glacial pollen Jan 27, 2019, 1:53 AM

#

That makes no sense

#

Why have a dedicated server option if it doesn't work??

worthy perch Jan 27, 2019, 1:54 AM

#

It's pretty decent for some things. Pretty much only loading levels is the problem.

woven bay Jan 27, 2019, 2:32 AM

#

Does anyone with a good foundation/background in C++ multiplayer care to DM with me and answer a few questions, I have a good background in Unity (8 years total programming knowledge) but I need some guidance with a project I'm starting in Unreal that will be a client-server title

sharp pagoda Jan 27, 2019, 2:45 AM

#

Why don't you ask here? You're much more likely to get answers

woven bay Jan 27, 2019, 2:46 AM

#

true I was just kind of hoping to have bit more of a 1 on 1

#

so my goal is a open world zombie survival game, client-server model, for the mechanics I got the most important ones:

Inventory
Crafting
Base Building
Melee + Ranged Combat
Raiding

My main questions are what classes should I be using to manage these on the server side? Should I just use a controller for inventory, crafting and combat or is there another way that I'm not thinking of?

#

I was doing a lot of the networking code in the project generated character class but I quickly realized that, that was a bad idea and that there's smarter ways of handling, for example, player vitals in a controller class

sharp pagoda Jan 27, 2019, 2:51 AM

#

So to start with inventory, there's three main places to put it.

2). A component of the player controller, use this if you want the inventory to be bound to the logical client, so it persists through respawning etc. Again no fine tuned net control
3). A standalone actor that can be on either the char or the controller, this gives you net update frequency control

#

AFAIK fortnite uses option 3, with the inventory pointer on the player controller

woven bay Jan 27, 2019, 2:52 AM

#

gotcha, now one thing is that the inventory would be persistent on disconnect so when you come back you will still have all the contents of your inventory but I'm sure that could just be stored in a .json file on the server end

sharp pagoda Jan 27, 2019, 2:52 AM

#

Crafting, base building, melee, raiding are similar and should be either character or controller. It really depends on whether you need it to persist across multiple characters you might possess.

woven bay Jan 27, 2019, 2:53 AM

#

you only control your character, when you die a duplicate of your player will be spawned that will be lootable to other players and then you'll respawn somewhere else in the world

sharp pagoda Jan 27, 2019, 2:53 AM

#

So you're basically making Rust?

woven bay Jan 27, 2019, 2:53 AM

#

for the server being authoritative would storing the inventory on the player character be fine as long as I use server methods and validate

#

Rust Legacy basically

sharp pagoda Jan 27, 2019, 2:54 AM

#

Yes it would

#

Especially since this is basically rust, option 1 is probably what you want

woven bay Jan 27, 2019, 2:55 AM

#

gotcha

#

I originally started this project in Unity but because I didn't have a lot of money or a big team backing me to work on a networking solution the project became a huge headache

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would bases just be actors with server replicated variables like health and stability?

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so each wall, foundation, roof, door, etc...

sharp pagoda Jan 27, 2019, 2:56 AM

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That's a bit trickier, because you have potentially tens of thousands of building components

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Yes with the health, no with the stability

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Well maybe

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It's probably pretty redundant to replicate the stability, since that can be calculated per-client

woven bay Jan 27, 2019, 2:58 AM

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that's true too

sharp pagoda Jan 27, 2019, 2:58 AM

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Think about when you hit a rocket on a foundation, it could tear down an entire structure, so you want to minimize the bandwidth cost of that

woven bay Jan 27, 2019, 2:58 AM

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ahh makes sense

sharp pagoda Jan 27, 2019, 2:59 AM

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For health - not much you can do that I can think of, you'll have to have all the components replicate their own health, but if you want to scale this game up like rust you'll need to write a pretty complex rep graph to handle all of that

woven bay Jan 27, 2019, 2:59 AM

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gotcha

sharp pagoda Jan 27, 2019, 3:00 AM

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Bookmark these, you'll need them later https://www.youtube.com/watch?v=CDnNAAzgltw https://www.youtube.com/watch?v=mT8VUVuk-CY

YouTube

UnrealEngine

Networking in 4.20: The Replication Graph | Feature Highlight | Un...

Working on a multiplayer game? Are there many players in-game together? On this livestream, our networking team will demonstrate 4.20's new Replication Graph...

▶ Play video

YouTube

UnrealEngine

Networking in UE4: Server Optimizations | Live Training | Unreal E...

This week we'll be joined by Ryan Gerleve and Dave Ratti to discuss general server optimization in UE4, as well as techniques and solutions to improve your A...

▶ Play video

woven bay Jan 27, 2019, 3:00 AM

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thank you, I've currently just been keeping a notebook with things I find out as I work on my project

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for when players go to sleep by disconnecting in the game would I basically just unposess the pawn or create an actor there?

sharp pagoda Jan 27, 2019, 3:03 AM

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"when you die a duplicate of your player will be spawned that will be lootable to other players" you probably don't want to duplicate the entire player like this, a better system would be to disable ticking, TearOff() as much as you can so you don't continue to replicate pointless info, enable ragdolling, set a lifetime and when that lifetime expires spawn a loot bag w/ all your stuff in it if there's anything left

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I would unpossess

woven bay Jan 27, 2019, 3:04 AM

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gotcha

sharp pagoda Jan 27, 2019, 3:04 AM

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Just like dying, there's not really a need to duplicate all that stuff

woven bay Jan 27, 2019, 3:04 AM

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by duplicate I just meant the player model and then it would just be like a storage container

sharp pagoda Jan 27, 2019, 3:05 AM

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A counter argument is how these things would work with your interaction system, since you can loot dead + sleeping players, so it's kind of a tricky design choice

woven bay Jan 27, 2019, 3:05 AM

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also for things like storage containers is it possible to store all the items in a .json file on the server?

sharp pagoda Jan 27, 2019, 3:05 AM

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Yea you would need something like that

woven bay Jan 27, 2019, 3:06 AM

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good to know

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I don't know how Unreal engine handles levels but would it be possible to just manipulate the level that the world uses and then save and load based off of that

sharp pagoda Jan 27, 2019, 3:07 AM

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Save/load the inventory items?

woven bay Jan 27, 2019, 3:07 AM

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base parts, storage, etc...

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vehicles

sharp pagoda Jan 27, 2019, 3:08 AM

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I would guess no, but don't hold me to that

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The objects in the world should be responsible for telling everyone else about themselves

woven bay Jan 27, 2019, 3:08 AM

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so how would bases be saved in the case of a server restart situation just like the inventory in a .json?

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or would that be a bit extreme?

sharp pagoda Jan 27, 2019, 3:10 AM

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You would need to serialize all of the actors through a save system, I don't have much experience there but there's loads of save system plugins/tutorials you can find

woven bay Jan 27, 2019, 3:10 AM

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oh okay I totally forgot about those

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is using those type of systems a smart idea? In Unity the engine changed so much so frequently that many asset developers would sometimes struggle to keep up

glacial pollen Jan 27, 2019, 3:11 AM

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@worthy perch
Enabling seamless travel in the appropriate gamemodes, and also using console command "servertravel /game/maps/lobby?listen" instead of the Level load
fixed everything for me

sharp pagoda Jan 27, 2019, 3:11 AM

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What are you referring to with "types of systems"?

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Just save systems in general?

woven bay Jan 27, 2019, 3:12 AM

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like code plugins in general

sharp pagoda Jan 27, 2019, 3:12 AM

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I'm not sure what you're going to do otherwise 😄 you have all the sourcecode with the plugin so you're free to update them separately as well

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Popular plugins tend to get supported constantly, so you shouldn't worry too much about that

woven bay Jan 27, 2019, 3:13 AM

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alright good to know

sharp pagoda Jan 27, 2019, 3:13 AM

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I mean you could roll your own everything, but what's the point? You're just reinventing the wheel + giving yourself more work

woven bay Jan 27, 2019, 3:14 AM

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right and that's very true too

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I just got burned a lot with Unity where a new unity update would come out that would help with workflow and just make developing a lot easier but then half of the programming based assets that I used with my project for things like shaders and or system I didn't have much knowledge in would end up breaking

sharp pagoda Jan 27, 2019, 3:16 AM

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UE4 tends to have a more static structure, so you typically only need to fixup some broken things between updates very rarely. Also I'm not sure what your average unity workflow is, but in ue4 you typically don't update your project to every major release.

woven bay Jan 27, 2019, 3:17 AM

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yeah I've figured that out 😄 it's very nice

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thanks again for talking to me, it's helped me get a better idea of how I'm going to accomplish everything

lean swallow Jan 27, 2019, 3:55 AM

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Hi there !

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Can some one explain what shoul contain a dedicat server?

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Or to guide me to a pacth.

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I want to learn more about dedicat server and multiplayer game, it anything that can help me

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by the way, i m new in development.

glacial pollen Jan 27, 2019, 6:30 AM

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Invalid player state after player travel? I see the player controller switches over to the new one, so why not the PS?

sharp pagoda Jan 27, 2019, 6:43 AM

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It does, when are you testing for it?

livid barn Jan 27, 2019, 6:51 AM

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After wqeeks of trying to understand the CharacterMovementComponent and how to replicate stuff; I only now discover there is code to set Client Authoritive Positions
And by the looks of it its simply a setting I can set in the Network Manager. Some flag or something.

Where can I find the network manager so i can set this? I'm googling and digging through menus, cant find the damn option anywhere 😦

thin stratus Jan 27, 2019, 8:31 AM

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@lean swallow Can you rephrase the question? Cause a DedicatedServer is the same as a ListenServer in terms of ServerCode.
Only difference is that the ListenServer is also a Client at the same time and you have to manage that as well.

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@livid barn You should be able to do that via ConfigFile

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Just check the name of the boolean and search if they are pulling that info from somewhere

livid barn Jan 27, 2019, 8:31 AM

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i found the parameter in game.ini but every time i start the editor it resets it back to false

twin juniper Jan 27, 2019, 9:57 AM

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dedicated server are better if you don't want a client inside it

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i think

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i have a question about the dedicated server

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so i don't need to rebuild the dedicated server everytime i make a change to the game

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just if i am adding c++ classes

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i see that when developement server is building , is just compiling c++

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but not blueprints

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?

twin juniper Jan 27, 2019, 11:39 AM

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so the server search is working

📎 unknown.png

versed socket Jan 27, 2019, 2:01 PM

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@twin juniper 🎉 Congratulations! Do you know if your server search is blocking or is it in a separate thread? (i.e. does it all come at once after a long time of searching or does it all trickle in slowly as you search for more servers)

Also how are you doing the search? Is it using Steam's server search interface? Is it using a custom web app back-end that you made?

twin juniper Jan 27, 2019, 3:02 PM

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@versed socket i am using the advanced sessions

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i am not really what subsystem it is

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i think is null

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and yeah it takes more time for the server to search

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but you can control the amount of servers

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but i tried to integrate steam subsystem into the dedicated server

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and is crashing like hell

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pff

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📎 unknown.png

twin juniper Jan 27, 2019, 4:36 PM

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oh man i am really thinking to leave the dedicated server and just use the listen server with steam sub system

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the errora and the compiling time are too much

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errors*

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Hey guys. I just set up world composition and my regular working spawns doesn't seem to work. Any obvious stuff that I should look at first? I've always worked with 1 large level with sub-levels always loaded before.

glacial pollen Jan 27, 2019, 5:25 PM

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Destroying Session - Invalid Player State
after server travel
any ideas?

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Its always after traveling to a new map with a different gamemode/player controller. And it happens after the new player controller is created

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[2019.01.27-17.30.35:666][864]LogWorld: ----SeamlessTravel finished in 0.43 seconds ------
[2019.01.27-17.30.35:666][864]LogGameMode: Display: Match State Changed from EnteringMap to WaitingToStart
[2019.01.27-17.30.35:667][864]LogGameState: Match State Changed from EnteringMap to WaitingToStart
[2019.01.27-17.30.35:922][872]LogGameMode: >> GameMode::HandleSeamlessTravelPlayer: PC_Menu_C_0
[2019.01.27-17.30.35:923][872]LogBlueprintUserMessages: [GM_Lobby_C_0] BeginPlayPC Client !!!!!!!!!!!!!!!!!!!!!!!
[2019.01.27-17.30.35:924][872]LogBlueprintUserMessages: [PS_Menu_C_0] PS BASE Copy Props !!!!!!!!!!!!!!!!!!!!!!!!!!!
[2019.01.27-17.30.35:925][872]LogBlueprintUserMessages: [GM_Lobby_C_0] Swapping Player Controller Lobby
[2019.01.27-17.30.35:927][872]LogGameMode: << GameMode::HandleSeamlessTravelPlayer: PC_Lobby_C_0
[2019.01.27-17.30.35:991][874]LogScript: Warning: Script Msg: DestroySession - Invalid player state

jolly siren Jan 27, 2019, 6:31 PM

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Has anyone worked with either of these?
LogSecurity: Warning: Malformed_Packet: Packet failed PacketHandler processing.

LogSecurity: Warning: Invalid_Data: Bunch data overflowed (15 42+491/170)

foggy hedge Jan 27, 2019, 7:24 PM

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i can t remove widget , could you please help me

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remove from parent does n t work

bleak lily Jan 27, 2019, 10:47 PM

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I am having an issue where I have a server browser and it works in the pie but it doesnt when I package it

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I am using the advanced sessions plugin

jolly siren Jan 28, 2019, 4:20 AM

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@foggy hedge wrong channel, try #umg

fleet raven Jan 28, 2019, 7:57 AM

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br_boi_ascended

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why would speedhack prevention for character movement be disabled by default

thin stratus Jan 28, 2019, 8:30 AM

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It's technically not?

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You have to modify the MaxSpeed of the CMC by hand on Server and Clients.
If only the local Client changes it, they will walk faster and the Server will correct them

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@fleet raven

fleet raven Jan 28, 2019, 8:32 AM

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I'm talking about the really basic speed hack that works by having time run faster for the client

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https://answers.unrealengine.com/questions/428329/client-speed-hack.html found this, the settings that were mentioned do indeed exist and are off by default

thin stratus Jan 28, 2019, 8:36 AM

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Ah that stuff, alright, not a lot of people actually find that or talk about it hehe

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Maybe it's off because of the same logic that they apply to everything "Not every game needs this, so it's optional for the ones that do."

fleet raven Jan 28, 2019, 8:39 AM

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I only found it because someone sent me a video of the old af cheatengine speedhack working just fine in my game

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ridiculous that they talk about server authoritative movement and then have this not enabled

fleet raven Jan 28, 2019, 9:01 AM

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btw, do you know of any good overviews on how the character movement works in detail? how to properly add custom predicted movement, points to integrate with weapons so they use the same location and aim on client/server, etc

manic pine Jan 28, 2019, 9:07 AM

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using server location/aim has some pitfalls yeah

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for one, the default move just sends a few digits of precision for the yaw and pitch

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and client's delaymove can make it so the server doesnt even have up to date location/view information in the first place

fleet raven Jan 28, 2019, 9:30 AM

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what do you mean by delay move?

spiral saffron Jan 28, 2019, 9:49 AM

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Is it possible to create a session on Dedicated Server? Do I need to override IOnlineSubsystem for this?

bitter oriole Jan 28, 2019, 10:02 AM

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Yes, and no

spiral saffron Jan 28, 2019, 10:28 AM

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Uhm... Then GameSession::RegisterServer.

manic pine Jan 28, 2019, 10:48 AM

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@fleet raven I just mean the CanDelayMove/MoveCombining stuff, which can temporarily delay server updating client char's location/view

fleet raven Jan 28, 2019, 10:49 AM

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oh yeah, what's this move combining about

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how does the server know what to do if it doesn't receive a client move for a while

manic pine Jan 28, 2019, 10:52 AM

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the server only does stuff when it receives a move

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server doesnt move client's char on regular tick

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even if its e.g. in the air

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(listenserver does run smoothing in tick when not receiving move)

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the idea with move combining is really just bandwidth conservation, so first it asks if it candelaymove... if it can, client stores the move instead of sending to the server

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then the next move it can do move combining, or even delay that move as well

thin stratus Jan 28, 2019, 11:45 AM

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@fleet raven Just google a bit

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There are one or two wiki posts

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That add some stuff to the CMC

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It's mainly adding it to the your own Move class

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And making sure the ClientData and ServerData are taking the new stuff into account

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Move is for replaying

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And ClientData / ServerData for the replication stuff

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iirc

twin juniper Jan 28, 2019, 1:10 PM

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the replication thing is more easy on unreal than unity

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btw

peak patio Jan 28, 2019, 1:37 PM

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Hello! Does someone know if it's possible to retrieve the session extrasettings inside the gamemode?
When I print "get session state", it write "no session", but it's a server instance so i'm 100% sure the session exist...

bitter oriole Jan 28, 2019, 1:38 PM

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What makes you think so ? Sessions aren't tied to multiplayer

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You usually want them connected, but they're completely independent mechanisms

peak patio Jan 28, 2019, 1:40 PM

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I actually used a "create advanced session". Then ("on succes") it open a level with the gamemode. In the beginplay on this game mode I want to retrieve that session...

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Did I do something wrong?

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Or maybe I didn't fully understand how all of this work...

bitter oriole Jan 28, 2019, 1:41 PM

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What you did sounds fine. it that on Steam OSS, or the default null OSS ?

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Not familiar with the session state

peak patio Jan 28, 2019, 1:42 PM

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as it's in the editor, I think it's null OSS (should be steam OSS)... I'll try with the steam OSS

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ok, so it works when connected on steam!

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I think i'll deal with that, just have to test everything on standalone mode, thank you very much 😃

bitter oriole Jan 28, 2019, 1:46 PM

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So, basically in editor you're restricted to null

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Actually I'm not even sure you have OSS in editor

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At all 😃

raven viper Jan 28, 2019, 1:47 PM

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Hi peeps! Quick question. eXi wrote a topic on C++ based session creation and hosting, and it seems to be outdated for a while now. I'm trying to use it in 4.20, and I get an error for including Online.h. VS says no such file or directory found, while VA finds it correctly at the time of include. Also in Build.cs I've got OnlineSubsystem, OnlineSubsystemUtils and OnlineSubsystemNull, yet it won't include Online.h

spiral saffron Jan 28, 2019, 1:49 PM

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@raven viper try to generate vs files with .uproject

raven viper Jan 28, 2019, 1:49 PM

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Did already, still won't include.

twin juniper Jan 28, 2019, 6:10 PM

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if you want to make a login

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you need to use an REST API

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that can do CRUD

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is not secure to use an direct connection to the database

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because you are giving the data to the users

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the idea with login is that you just need to get the data for the username and password

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and after just to compare

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in the game

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you don't really need to chose php for an api

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you can use python,node.js or ruby on rails

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i don't know really what playfab or gamesparks is doing

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yeah

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you can host one locally or to choose an website

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no you need to create an API on the website

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and a login inside the game

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you can also make a login on the website if you want

sharp pagoda Jan 28, 2019, 6:21 PM

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I don't know where you're getting this "requirement to have a website" from, but you don't need one. For a login system you just need a remote server that you can contact and request/submit data to through a secure connection.

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You can create accounts from anywhere you want, it's just contacting the login server.

twin juniper Jan 28, 2019, 6:21 PM

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what i said ?

sharp pagoda Jan 28, 2019, 6:22 PM

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"if you want to make a login
you need to use an REST API"

twin juniper Jan 28, 2019, 6:22 PM

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an website is still an server

sharp pagoda Jan 28, 2019, 6:22 PM

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"Well thanks, but does that mean that I have to host a website for creating login ?" -> "yeah
you can host one locally or to choose an website"

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You're implying that you need a website for this

twin juniper Jan 28, 2019, 6:23 PM

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yeah because when i am thinking at login

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i am thinking at an website

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📎 unknown.png

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does anybody have an idea how i can make

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without opening the game

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i searched that playfab is doing

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i think you can use that services

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https://api.playfab.com/docs/getting-started/unreal-mkpl-getting-started

spiral saffron Jan 28, 2019, 6:37 PM

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I tried both playfab and gamesparks and personally for me second was better. Better DB, easier login, but poor last version support (I had to ask in user support for 4.21 plugin) because of they can not upload it to marketplace (don't know why)