#multiplayer | Unreal Source | Page 512

twin juniper Dec 25, 2019, 8:32 AM

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Im using advance locomotion system

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but I also tried Third person template

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The client MS should be the same as the one int he server

dawn nova Dec 25, 2019, 8:33 AM

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Now, for my issue: I have a child class of playerstate where I override OnRep PlayerName and UpdatePing to broadcast an event when they are called. This works fine until another player joins. My name changes to "Player" for me after another player joins and UpdatePing apparently isn't being called for other players than myself. Anyone know how to fix this or why this happens?

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@twin juniper try looking up that option to check client prediction vs actual server location

twin juniper Dec 25, 2019, 8:34 AM

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So client doesn't update?

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sorry for sounding noob, and i dont know if its the case

dawn nova Dec 25, 2019, 8:35 AM

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That is probably the case if you are having rubberbanding

twin juniper Dec 25, 2019, 8:35 AM

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but did u put the codes on player owned entities?

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I will look it up, thx

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why dont u do switch and see what doesn't fire

dawn nova Dec 25, 2019, 8:37 AM

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The issue is that UpdatePing does not fire for other PlayerStates than myself

twin juniper Dec 25, 2019, 8:37 AM

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where is updateping located?

dawn nova Dec 25, 2019, 8:37 AM

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And when another player joins my own playerstate's playername changes to Player

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This is for my issue though, nothing to do with your thing just so you know

twin juniper Dec 25, 2019, 8:37 AM

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yea i know

dawn nova Dec 25, 2019, 8:38 AM

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UpdatePing is from PlayerState

twin juniper Dec 25, 2019, 8:38 AM

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is player state like playercontroller? which retained through levels?

dawn nova Dec 25, 2019, 8:38 AM

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PlayerState is playerinfo that is shared between server and client

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Holds playername, ping, etc

twin juniper Dec 25, 2019, 8:39 AM

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each player have their own playerstate i suppose?

dawn nova Dec 25, 2019, 8:40 AM

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Yes, there is an array of PlayerStates in GameState

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Each pawn also has a playerstate variable associated with it

twin juniper Dec 25, 2019, 8:41 AM

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for me, i had a problem where my event only fired by server because it was outside player owned blueprint (Gameinstance, Player controller, Player character)

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im not sure about playerinfo

dawn nova Dec 25, 2019, 8:42 AM

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I know about that, the issue is that the UpdatePing method does not get called on PlayerState that is not your own

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I am asking if there is an alternative method I should be using

twin juniper Dec 25, 2019, 8:45 AM

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first of all, i think u know more than me. if the problem is update ping not being fired by client, then shouldn't you find out why, because i suppose in theory, you should be able to fire method and inform the server to do the same

dawn nova Dec 25, 2019, 8:46 AM

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I am asking everyone in here, the issue is UpdatePing does not get called on client for other PlayerStates than your own

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And OnRep PlayerName correctly displays my Steam name at first, but then updates to Player for myself when another player joins the game

fleet bear Dec 25, 2019, 11:41 AM

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making an auto matchmaking set up for my project. It works.

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I have a question about how to call a ready up function before a player joins a session

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I'd like to use UDP, but I see this requires using ip addresses and sockets. I am worried about network security. I do not want people finding out other users ip addresses. What is the approach I should look into?

fleet bear Dec 25, 2019, 12:20 PM

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looking to do the following

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[client] Loop x times for session with required criteria
[client] Not found, then host
[client becomes server]Broadcast session update changes
[client] On find servers check criteria and add valid to list
[client] Every x seconds check list validity
[client] On non valid remove from list and keep searching till new valid fills spot in list
[client] Every x seconds send join requests
[server] receive join request, reserve slot
[server] not received join request from client in x seconds, reopen slot
[server] On server criteria populated send ready up request 
[server] On all response join all to session
Pick characters and map
[server] Server travel
[server] Start match
[server] on decline or not receive response, back to wait for criteria

steady cape Dec 25, 2019, 3:44 PM

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Hello, guys.
I have a problem with replicating timer. The code creating timer on both server and client and passes event on server with Multicast flag.
Spoiler, it doesn't work
and I don't know how

📎 2019-12-25_1932.png

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📎 2019-12-25_1937.png

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(Blue line shows time remaining)

meager spade Dec 25, 2019, 3:55 PM

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not sure why you are multicasting

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that looks so messy

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each player has 2 bombs right?

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when you use a bomb, after X time you get another bomb right?

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you could do that same logic much more simpler

steady cape Dec 25, 2019, 3:58 PM

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Well, I can additionally explain every node to you:

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On BeginPlay I check wherether bombs amount is already at max value, if not - creating a timer (which writes in variable) and defines what it does when finished

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After defining (since timer is created on both server and client) there are SwitchHasAuthority node, which blocks signals from client (this is done due to bombs duplicating without it) and continues to Multicast event

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And Multicast adds bomb, checks what amount of bombs we have, and, if it's not enough, creates timer once again

meager spade Dec 25, 2019, 4:03 PM

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yeah but i don't get the multicast

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why are you multicasting

steady cape Dec 25, 2019, 4:03 PM

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To set variables

meager spade Dec 25, 2019, 4:03 PM

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why does every client needs to know?

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no it doesnt work like that

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http://www.interkaos.com/grabs/UE4Editor-Win64-DebugGame_dOnZmxhbxV.png

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take this for example

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Client uses bomb, calls BombUsed

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this is a Server RPC to the server to start a cooldown on the bomb

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after X time, the bomb count is incremented

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this is replicated back to the client

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no multicast needed

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Replicated variables dont need to be multicast

steady cape Dec 25, 2019, 4:07 PM

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Hm... ok

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I tried to disabled Multicast

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Yes, variables sets even through it's server

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(for some reasons, it doesn't work with ReceiveDamage)

meager spade Dec 25, 2019, 4:07 PM

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?

steady cape Dec 25, 2019, 4:08 PM

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But, the issue is - the timer still does not replicates

meager spade Dec 25, 2019, 4:08 PM

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you dont replicate the timer

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why would you do that

steady cape Dec 25, 2019, 4:08 PM

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📎 2019-12-25_1937.png

meager spade Dec 25, 2019, 4:08 PM

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they cant be replicated

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impossible

steady cape Dec 25, 2019, 4:09 PM

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So, you say I have to record remaining time value every second it exists?

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*not second - frame

meager spade Dec 25, 2019, 4:09 PM

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the client would run his own timer

steady cape Dec 25, 2019, 4:09 PM

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OH REALLY

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What's wrong with multicast then

meager spade Dec 25, 2019, 4:10 PM

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multicast is to all clients

steady cape Dec 25, 2019, 4:10 PM

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And....

meager spade Dec 25, 2019, 4:10 PM

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you dont need to do that

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why does ALL clients need a timer for one clients bomb cooldown?

steady cape Dec 25, 2019, 4:10 PM

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'cause I didn't do UI yet

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I might use it

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(maybe)

meager spade Dec 25, 2019, 4:11 PM

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you dont even need to do that

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multicast should rarely be used

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i wouldnt even use a timer on the server

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i would have a replicated bombcooldowntime remaining variable

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which decrements every tick

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and is replicated

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no need for multicast

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client can use that aswell

steady cape Dec 25, 2019, 4:12 PM

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I think this is fucked-up solution

meager spade Dec 25, 2019, 4:12 PM

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what is?

steady cape Dec 25, 2019, 4:12 PM

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your's

meager spade Dec 25, 2019, 4:12 PM

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its how epic does it with gameplay abilities

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they use on Fortnite etc

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so how is it fucked up?>

steady cape Dec 25, 2019, 4:12 PM

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Fine, ok

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It's really not nice for me to use Event Tick anywhere

meager spade Dec 25, 2019, 4:13 PM

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why

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who told you that crap

steady cape Dec 25, 2019, 4:13 PM

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'cause it runs every fram... ugh, whatever

meager spade Dec 25, 2019, 4:13 PM

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and?

steady cape Dec 25, 2019, 4:13 PM

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Ok, I'll try do that way

meager spade Dec 25, 2019, 4:14 PM

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honestly if you don't believe me, look at the source code for any game that does cooldowns

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and you can make your system so simple

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let me show you

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http://www.interkaos.com/grabs/UE4Editor-Win64-DebugGame_ckw2qQVt17.png

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bombs and CurrentBombCooldownTime are replicated

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from the server

ocean geyser Dec 25, 2019, 4:24 PM

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may as well do kind of what const suggested, just have a single bool replicated OnRep variable on the bomb and a float thats for the timer thats for the widget. when the bomb is created or triggered to go off the timer counts down on the client for your widget as well as on the server so they should be pretty close to one another depending on latency, then when the bool gets triggered at the end of the timer (on server) make it explode via the onrep event/function and destroy the actor. started typing this before he posted his example, he knows what he doing so learn from it. also havent read exactly what your trying to do so the above what i said may not apply

meager spade Dec 25, 2019, 4:24 PM

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i mean thats quick and dirty, could be optimized

steady cape Dec 25, 2019, 4:25 PM

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Ok, that works, thx

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However!

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It has some initial delays on client

meager spade Dec 25, 2019, 4:29 PM

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ofc, thats the downside

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which is why clients should really run there own timer.

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you can decrement the bomb count locally

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aswell

steady cape Dec 25, 2019, 4:30 PM

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I think this isn't how it's done

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Whatever, not really much loss

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since initial timer is only for debbugging

meager spade Dec 25, 2019, 4:30 PM

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well you could make it so client runs its own cooldown timer

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depends how much you can trust the client

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we do our timers predicted

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meaning client runs his own own cooldown timer, and sets his own bomb count

steady cape Dec 25, 2019, 4:32 PM

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Yeh, I understand you

meager spade Dec 25, 2019, 4:32 PM

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then tells the server, to do the same

steady cape Dec 25, 2019, 4:32 PM

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I mean, again, this doesn't matter if not working initially

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And I did this init only to check if it works

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Thank

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s

meager spade Dec 25, 2019, 4:33 PM

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i would decrement the bomb count locally to reduce the lag of the bomb count updating

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so before you tell server to decrement a bomb, decrement it locally

steady cape Dec 25, 2019, 4:33 PM

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I will remember this

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I don't need it now due to the fact that it is like "test" project, but I think that might come in handy one day, so thank you

meager spade Dec 25, 2019, 4:34 PM

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np, hopefully you understand rpc's and replication a bit better

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

Cedric Neukirchen

eXi

Multiplayer Network Compendium

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this is good to read

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so you can understand a bit more

steady cape Dec 25, 2019, 4:56 PM

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Yeah, thank you, that'll help me, I'm sure. Just will ignore the fact that my browser says it doesn't exists

dawn nova Dec 25, 2019, 5:04 PM

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I have a child class of playerstate in C++ where I override OnRep PlayerName and UpdatePing to broadcast an event to my UMG UI when they are called. This works fine until another player joins. My name changes to "Player" for me after another player joins and UpdatePing apparently isn't being called for other players than myself. Anyone know how to fix this or why this happens?

hoary lark Dec 25, 2019, 7:34 PM

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@twin juniper https://www.reddit.com/r/unrealengine/comments/a0n455/listen_server_host_sees_clients_jittering_fix/ this probably discusses your isssue

Listen Server host sees clients jittering fix

Hello, I wanted to post this because it seems like no one has really addressed this issue from what I've googled. I posted on the UE answer hub a...

twin juniper Dec 25, 2019, 7:49 PM

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@hoary lark 💯

distant wave Dec 25, 2019, 7:58 PM

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Hey

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So after doing some more testing

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I realised that only the server can see the particle effects spawned when a projectile hits something

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The server can see the particle fx spawned by the bullet he shot and can also see the particle fx spawned by the bullet a client shot

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However the client cannot see his particle fx

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Or the server particle fx

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Nor some other client's particle fx

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The bullet is replicated

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📎 ImpactEffectsCode.txt

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This is some of the code

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PlayImpactEffects() is a function that basically spawns the particle effects

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There was no need to also show you that

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I have a repnotify struct that contains a physical surface and a vector that represents the impact point of the bullet

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Also that txt file contains bullet code

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Anyways

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The onrep function for that struct calls the play impact effects function

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And on bullet hit i set that struct values to the right values

hoary lark Dec 25, 2019, 8:03 PM

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did you see the long-ish message i wrote when you were here last time? right after your final message on monday

distant wave Dec 25, 2019, 8:03 PM

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I don t think so

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Oh

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Probably i saw it

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You were saying something about when i spawn the bullet

hoary lark Dec 25, 2019, 8:04 PM

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just making sure

distant wave Dec 25, 2019, 8:04 PM

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Alright

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I think there is a problem with the projectile it shouldn t act like that

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The rpcs do not work

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That code should work properly

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What is wrong with it

hoary lark Dec 25, 2019, 8:05 PM

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was telling you that you're doing this all kind of weird (i don't want to say "wrong" even though i would consider it wrong) and i very very generally explained how you should handle bullets

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or at least how i think most games do

distant wave Dec 25, 2019, 8:06 PM

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It is how Fortnite handles this kind of replication

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Only that they handle if for line trace guns

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I also tried multicast and it just doesn t do anything

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I thought i was doing something wrong, so i looked at exi s network compendium

hoary lark Dec 25, 2019, 8:07 PM

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for a linetrace weapon, the impact is analagous to the bullet...

distant wave Dec 25, 2019, 8:08 PM

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When the bullet hits something it creates a sphere trace

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That is how I return the physical surface

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The owner of the bullet was the gun

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Then i set it to the player

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I thought that was the issue

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But it isn t

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Basically i check a line trace impact even though that line trace is fired when the bullet hits something

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Why would you consider it wrong?

hoary lark Dec 25, 2019, 8:10 PM

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wait, what? after the projectile hits something you run another trace to see what it hit?

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i don't think you read my final messages from monday

distant wave Dec 25, 2019, 9:14 PM

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Yes I showed you in the txt

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GetWorld()->SweepSingleByChannel(ProjectileHit, GetActorLocation(), Hit.ImpactPoint, FQuat::Identity, COLLISION_WEAPON, FCollisionShape::MakeSphere(3.5f), QueryParams)

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I am doing this because I need to also return a physical material

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Because the object hit event does not return it only a trace does

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I found you last messages

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The thing is that I don t understand what is wrong with my code

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Shouldn't it work fine?

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I don t want to do this stuff inside the weapon

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I wanna do it inside the bullet

hoary lark Dec 25, 2019, 9:42 PM

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well, hmm.

no you should not have to do a second spherical trace to find out what objects are nearby the point of impact to find out what physical material the bullet might have hit, think about it... that'd be ridiculous and completely negate the point of having a collision impact event in the first place. figure out why you can't get it from the initial impact.
you wouldn't do all of this in weapon. all of my suggestions before were about where and how you should handle bullet spawning to make this easier on yourself. the bullet class should still handle all of the FX it makes.
if you want to keep doing things "your way" then the first obvious issue I see is that you don't RPC the FX down from the server to all clients I think

distant wave Dec 25, 2019, 10:29 PM

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There is no other way of returning the physical material

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I thought about it

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And yes I have bullet drop

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So this is why I am not using line tracing for this particular weapon

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It is a sniper

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2....

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Why?

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I tried multicast

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That doesn t work either

hoary lark Dec 25, 2019, 11:06 PM

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what do you mean "returning" the physical material? what calls OnProjectileHit? why can't you just read the impacted physical material from Hit?

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my game doesn't use line tracing either

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were you multicasting from client or something??

distant wave Dec 26, 2019, 12:23 AM

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Because when an object hits something you cannot return the physical material

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Neither can the line trace IF you do not set the bReturnPhysicalMaterial to true in the query parameters

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But I created a sphere trace basically

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A bit larger than the actual bullet collision

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And so when it hits something it can also return a physical mat

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So i can play different effects based on that

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The OnProjectileHit is basically OnHit.AddDynamic and I add that function

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But don t worry

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That has nothing to do with it

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I also tried just spawning a basic effect without the line trace and all that on hit

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And it doesn t work

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Only for the server

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Very strange

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I am starting to think it is a bug or something

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I also tried adding a multicast function which should play the effects on both server and client

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Still works just for the server

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Only the server sees the effects

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The bullet is replicated and all that

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It s like the RPC s don t work in the event hit

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Long story short:

When the projectile hits something, a sphere trace is created around that bullet which will hit the same object as the bullet hit, but also return the physical material of it. Then, I set the struct containing a physical mat and a vector to the right values. The struct is rep notify. The on rep function plays the impact effects.

hoary lark Dec 26, 2019, 1:15 AM

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@distant wave I'm sorry it's been a year since I built my projectile system. are you using Projectile Movement Component? if so, have you tried using its OnProjectileStop event instead?

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and were you calling the multicast on the server?

dapper hatch Dec 26, 2019, 5:09 AM

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anyone can help me real quick? Im trying to do this, but its only doing it to the server. (I want it to happen to all players)

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https://gyazo.com/6368278f95534831b1f6761a63071003

Gyazo

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Is there a way of getting a reference to all the players?

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or something like that

earnest igloo Dec 26, 2019, 5:13 AM

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@dapper hatch You're only using player controller 0 there. Do you want to set the view target for all player controllers, or happen on all clients?

dapper hatch Dec 26, 2019, 5:13 AM

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all clients and the server

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everyone

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basically

earnest igloo Dec 26, 2019, 5:14 AM

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Should all the players end up using the same camera? You're trying to sync everyone's view?

dapper hatch Dec 26, 2019, 5:14 AM

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kinda of

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its for the main menu

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before they connect to the same lobby

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@earnest igloo

earnest igloo Dec 26, 2019, 5:16 AM

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Hmm ok, so it's kinda like "look at the menu"?

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@dapper hatch Where is it triggered from? Your GameMode?

dapper hatch Dec 26, 2019, 5:21 AM

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level blueprint

earnest igloo Dec 26, 2019, 5:40 AM

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Whoops forgot to switch a couple of connections, will re-do

dapper hatch Dec 26, 2019, 5:41 AM

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Is there a way of making the camera switch to this one when the game starts

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cause its only the menu

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basically I just want to set the camera to this one when the game starts (before even joining any multiplayer session)

earnest igloo Dec 26, 2019, 5:46 AM

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Ok my last attempt was bung, sorry. This is better:

📎 unknown.png

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But as to your question...

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"When the game starts" and "before even joining any multiplayer session" combine to make things easier

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As there will only be one player

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And therefore one (local) player controller

dapper hatch Dec 26, 2019, 5:49 AM

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yea

earnest igloo Dec 26, 2019, 5:49 AM

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How about making a super simple Pawn that only contains a camera?

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Then stick it in your level where you want it and tell it to auto-possess Player 0?

dapper hatch Dec 26, 2019, 5:50 AM

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oh can I do that?

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how*

earnest igloo Dec 26, 2019, 5:51 AM

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One moment, will screenshot it for you

dapper hatch Dec 26, 2019, 5:51 AM

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thx mate rly appreciate it 🙂

earnest igloo Dec 26, 2019, 5:53 AM

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You could do this in your level BP's BeginPlay with a camera in the level too, but I'm a fan of not putting stuff into the level BP unless I have to

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So I made a new Pawn class. All it has in it is a camera, I haven't done anything else to it at all

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📎 unknown.png

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I just made it using the normal BP class maker from the content browser, and selected Pawn as the parent class

dapper hatch Dec 26, 2019, 5:56 AM

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Ohhh brilliant

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Tysm man its working fine now 🙂

earnest igloo Dec 26, 2019, 5:56 AM

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Then I put it into the level where I wanted it and set it to Auto Possess Player Player 0

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Oh nice

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I'll just leave this here for reference for anyone else then 🙂

📎 unknown.png

distant wave Dec 26, 2019, 10:08 AM

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@hoary lark Hey! Yes, I am using projectile movement component and no I haven't tried that. I am going to try it asap. Thanks!

gritty pelican Dec 26, 2019, 3:05 PM

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GetLifetimeReplicatedProps(TArray< FLifetimeProperty > & OutLifetimeProps) const
Is this required for replicated variables? I want only the server and controller of the player to know about my variable.

half jewel Dec 26, 2019, 4:20 PM

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yea @gritty pelican

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inside that headerless function you do Super::GetLifetimeReplicatedProps(TArray< FLifetimeProperty > & OutLifetimeProps) const
and then your next line for server&controller of player replication you do DOREPLIFETIME_CONDITION(AObjectNameHere, PropertyNameHere, COND_OwnerOnly);

gusty raptor Dec 26, 2019, 5:50 PM

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Hi so I noticed that physx now replicates , is it new in 4.24?

gritty pelican Dec 26, 2019, 6:24 PM

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@half jewel thanks

gray scroll Dec 26, 2019, 6:24 PM

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On server... pawn's possession gets called first then load settings... on dedicated server... load settings get called first then onposession. Why is that?

📎 unknown.png

gritty pelican Dec 26, 2019, 6:25 PM

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@gray scroll You need to divide the functionality into the begin play.

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make "SwitchHasAutrhority"

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OnPossess called on the server.

gray scroll Dec 26, 2019, 6:27 PM

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sorry... this even beginplay is in player controller

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this should always get called before character possession inside character

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@gritty pelican

gritty pelican Dec 26, 2019, 6:28 PM

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Try to remove the "Default Pawn" from YourGameMode

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and in your controller you can make
Event Begin Play -> Switch Has Authority

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On Remote you can load your local settings

gray scroll Dec 26, 2019, 6:29 PM

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damn

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that did it

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thank you so much!

gritty pelican Dec 26, 2019, 6:30 PM

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on Authority you can SpawnActor (Character) and make possess

gray scroll Dec 26, 2019, 6:30 PM

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default pawn was my pawn so it was called right away

gritty pelican Dec 26, 2019, 6:30 PM

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not at all 🙂

grizzled tide Dec 26, 2019, 6:51 PM

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Hi

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im trying to send a Tarray as binary

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https://pastebin.com/ZQC3B0ga

Pastebin

[C++] USTRUCT() struct FReplicationBodyMessage { GENERATED_BOD...

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im using a Tarray<int32> and always returns empty on read

twin juniper Dec 26, 2019, 7:45 PM

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I am trying figure out how many players I can squeeze into a multiplayer game or scene. Is there an approximate range of players UE4 can handle before performance takes any type of hit? And what are the biggest factors limiting the number?

hoary lark Dec 26, 2019, 7:57 PM

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the engine has very little to do with that kind of question. it's "simply" a matter of how complex your game is, what hardware it will be ran on, and how good your skills are at optimizing both netcode/bandwidth and server CPU load. maybe look up games made with UE4 and see what's been done with it already?

dawn nova Dec 26, 2019, 9:59 PM

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just to give you an idea there were battle royales made with UE4 (fortnite, PUBG), just mentioning because of the enormous player counts (~100 players)

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ReplicationGraph is the way to go to make your game as network efficient as possible when you need it imo

gleaming vector Dec 27, 2019, 12:25 AM

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@grizzled tide uh, my advice is don't do it that way

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you want to use a NetSerialize function

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take a look at NetSerialize.h in the engine

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there is a big comment about how to use NetSerialize functions and TStructOpsTypeTraits

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but that will give you the control you are looking for to push arbitrary bytes into a FArchive

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@twin juniper the answer to your question is long, complicated, and very messy

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you will start to see serious performance issues with most ways of doing replication at around 60 players

grizzled tide Dec 27, 2019, 12:27 AM

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@gleaming vector i changed the code to this

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uint8* DataPtr = (uint8*)Data;
FBufferReader Ar(DataPtr, Size , false);
FReplicationBodyMessage repDataList;
Ar << repDataList;

GetWorld()->GetGameState<AMainGameState>()->ProcessReplication(repDataList.content);

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and it worked

gleaming vector Dec 27, 2019, 12:27 AM

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ok

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I don't recommend that honestly

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since you are forcing the data through the GameState's actor channel

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and in a weird way

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what are you trying to do?

grizzled tide Dec 27, 2019, 12:28 AM

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just for the record

gleaming vector Dec 27, 2019, 12:29 AM

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because, if you are trying to do arbitrary binary data where you control the packet structure... you can also create your own Data Channel and form packets that way

grizzled tide Dec 27, 2019, 12:29 AM

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Binaryreader doesnt work with tarrays inside of structs

#

@gleaming vector im making a mobile game with pvp 1 vs1

#

because i cant use sessions and use replication

#

for what i have investigated

#

i crated a custom way to comunicate two players

gleaming vector Dec 27, 2019, 12:30 AM

#

ok

grizzled tide Dec 27, 2019, 12:30 AM

#

so i have anodejs server that acts a relay

gleaming vector Dec 27, 2019, 12:31 AM

#

ah

#

so you are actually just trying to get the bytes of a TArray?

grizzled tide Dec 27, 2019, 12:31 AM

#

so i have a CLient-server PLayer and a client player, and im sending data between those two using a nodejs server

gleaming vector Dec 27, 2019, 12:31 AM

#

also, you can use the unreal engine network stack with mobile

#

but it's a bit more work than what you did

#

hey, if it works, it works

grizzled tide Dec 27, 2019, 12:32 AM

#

Theclientserver gather every certain time a list of replicated actors and send them to the other client

#

so that is an array of structs that contains data of actors that need to be updated, like the position of projectiles

gleaming vector Dec 27, 2019, 12:33 AM

#

yeah

grizzled tide Dec 27, 2019, 12:34 AM

#

@gleaming vector i read about netserialze but honestly didnt go deep because for now its working ok, but mi game is simple so maybe i will have to look after

#

but i dontk know what is unreal engine network stack

gleaming vector Dec 27, 2019, 12:34 AM

#

unreal engine's network stack is everything replication related

#

from forming data into creating channels and pushing data through those channels into sockets

#

there are many ways to gain access to different parts of the stack... from NetSerialize on the top level to NetChannels on the driver level, to writing your own Socket layer at the base layer

#

you can change out many of those things

grizzled tide Dec 27, 2019, 12:36 AM

#

i was using sockets at first but i was unable to make ip connection between mobiles because nat

#

i checked nat punching ICE, Stun , etc

#

but it doesnt work

gleaming vector Dec 27, 2019, 12:37 AM

#

i dont do mobile myself

#

so, can't really help

grizzled tide Dec 27, 2019, 12:37 AM

#

then i tried to make use of replication investigating about how work Unetdriver to connect them directly

#

but i couldnt find info about how customize it

#

i checl ActorChannels and that stuff

#

but i coulldn find a way of use them

#

https://answers.unrealengine.com/questions/940665/view.html

meager spade Dec 27, 2019, 12:41 AM

#

i mean you could just run a ue4 server

#

but then again

#

depends how your game works

#

ue4 server on its own is really small

grizzled tide Dec 27, 2019, 12:41 AM

#

Run a server for a 1vs1 game

meager spade Dec 27, 2019, 12:42 AM

#

so you were making a relay between them

#

not sure why direct connection doesnt work, then again, you would need to get the ip address of the person you want to play against

grizzled tide Dec 27, 2019, 12:43 AM

#

it doesnt work because nat

meager spade Dec 27, 2019, 12:44 AM

#

i mean you can create a subsystem

#

you create a session on your nodejs

grizzled tide Dec 27, 2019, 12:44 AM

#

nat punching doesnt work with mobile data internet btw

meager spade Dec 27, 2019, 12:45 AM

#

then you conect using a id, bit like steam, but steam probably doesnt work on mobile

#

i know something like google subsystem or ios subsystem

#

should work

grizzled tide Dec 27, 2019, 12:45 AM

#

they dont

meager spade Dec 27, 2019, 12:45 AM

#

so your saying all these games on mobile that use UE4, don't work?

grizzled tide Dec 27, 2019, 12:45 AM

#

google subsystem doesnt have realtiem mutliplayer

#

thos subsystem work for things like achievements and Inapp and those stuff

#

but they dont have implementation for multiplayer

gleaming vector Dec 27, 2019, 12:48 AM

#

i remember epic giving a talk about mobile networking with fortnite

#

and it was particularly difficult

#

so i'm not surprised innerchild is having issues

grizzled tide Dec 27, 2019, 12:48 AM

#

as far as i know

#

they use dedicated servers

gleaming vector Dec 27, 2019, 12:48 AM

#

they do

#

doing something peer 2 peer-ish sounds like a nightmare

grizzled tide Dec 27, 2019, 12:49 AM

#

yes is complex

gleaming vector Dec 27, 2019, 12:49 AM

#

ipv6 now please 😛

grizzled tide Dec 27, 2019, 12:49 AM

#

but implement a dedicated server for a 1vs1 game is overkill

#

i would have to create a server instance per each match

#

i was investigating and i found this

#

https://dev.epicgames.com/docs/services/INT/Interfaces/P2P/index.html

P2P Interface

Interface to send and receive data between users, and related networking functionality.

#

but i didnt understand how to implement the sdk

rich ridge Dec 27, 2019, 7:07 AM

#

@grizzled tide have you explored Nakama server

#

It's does support real-time gameplay

#

And one instance of Nakama server is not 1 vs 1

#

https://heroiclabs.com/

Heroic Labs | Nakama - Open-source server for social and realtime ...

Heroic Labs builds Nakama - an open-source social and realtime server for games and apps. It includes a large set of services for users, data storage, and realtime client/server communication; as well as specialized APIs like realtime multiplayer, groups/guilds, and chat.

steady cape Dec 27, 2019, 8:40 AM

#

For some reasons, removing widget works fine on clients, but breaks when we're talking about listen-client

📎 2019-12-27_1219.png

#

📎 2019-12-27_1222.png

hoary lark Dec 27, 2019, 10:44 AM

#

If you're controlling UI widgets across the network you're doing things wrong anyway TBH

steady cape Dec 27, 2019, 11:07 AM

#

Oh, I have an idea

#

No, I don't have any

#

Even trough I done all logic in my controller (ALL LOGIC), it still doesn't remove

#

Ok, any other ideas?

distant wave Dec 27, 2019, 11:31 AM

#

Maybe check if it is locally controlled before removing the widget

#

And also for future projects, when we are talking about multiplayer it is best to create widgets inside HUDs

steady cape Dec 27, 2019, 11:38 AM

#

@distant wave Gee thanks, man

#

How couldn't I thought about HUD

#

Now this stuff works

grizzled tide Dec 27, 2019, 12:18 PM

#

@rich ridge yes i checked. I passed because it doesn't resolve the replicación problema and there Is donde comenta about shady termas of use

timid moss Dec 27, 2019, 12:23 PM

#

Hi guys. Long story short my router basicly is messed up and i cant have my friends open my public IP to join my game. Only people in my lan can do this. i heard someone say once that you can use a VPN to fix this but how?

#

and whats a good VPN to do this with?

low lily Dec 27, 2019, 12:43 PM

#

Hello guys i started with multiplayer and changed some things in Mannequin character (I changed max walk speed to 150 and added control to run od left shift) but when i turn on te multiplayer the Client 2 is just walking even if press left shift , but the client 1 is perfectly running and walking.
Can somebody tell me whats wrong?

#

📎 Desktop_Screenshot_2019.12.27_-_13.33.15.55.png

#

📎 Desktop_Screenshot_2019.12.27_-_13.33.25.91.png

wicked brook Dec 27, 2019, 12:45 PM

#

pretty sure you need to set up events to run on server and client so that the server tells the clients like hey i want to sprint

low lily Dec 27, 2019, 12:47 PM

#

📎 Desktop_Screenshot_2019.12.27_-_13.46.44.93.png

#

i hope you see the problem on this ss

meager spade Dec 27, 2019, 12:47 PM

#

that screenshot shows nothing

steady cape Dec 27, 2019, 12:48 PM

#

Well, you should create two Custom events, on toolbar choose "Run on server" "Reliable = true"

meager spade Dec 27, 2019, 12:48 PM

#

but yeah, your just changing the clients speed

wicked brook Dec 27, 2019, 12:48 PM

#

@low lily you dont have any server events

meager spade Dec 27, 2019, 12:48 PM

#

server doesnt automatically know

steady cape Dec 27, 2019, 12:48 PM

#

And assign button on that

meager spade Dec 27, 2019, 12:48 PM

#

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

Cedric Neukirchen

eXi

Multiplayer Network Compendium

wicked brook Dec 27, 2019, 12:48 PM

#

and you will need like a bool thats replicated

#

to catch it on the clients

steady cape Dec 27, 2019, 12:49 PM

#

I don't think that it's really requires bool but ye

#

Wair

#

Wait*

meager spade Dec 27, 2019, 12:49 PM

#

sprint is best with a bool or maybe a flip flop, but either way

#

server needs to know the player is sprinting

wicked brook Dec 27, 2019, 12:50 PM

#

📎 Untitled.png

#

Something like this

meager spade Dec 27, 2019, 12:50 PM

#

whats with the client rpc

#

why would that need to happen?

low lily Dec 27, 2019, 12:51 PM

#

thanks guys i will try it and tell you the results

meager spade Dec 27, 2019, 12:51 PM

#

the client rpc is completly not needed

wicked brook Dec 27, 2019, 12:52 PM

#

Where, on mine?

low lily Dec 27, 2019, 12:54 PM

#

@wicked brook what type of input is movement?

steady cape Dec 27, 2019, 12:56 PM

#

@low lily Like this

📎 2019-12-27_1655.png

low lily Dec 27, 2019, 12:56 PM

#

i make that in tps or in multiplayer?

steady cape Dec 27, 2019, 12:56 PM

#

I think that'd be easier for the first time

low lily Dec 27, 2019, 12:56 PM

#

okay

meager spade Dec 27, 2019, 12:57 PM

#

http://www.interkaos.com/grabs/UE4Editor-Win64-DebugGame_PlqdIqnOLx.png

steady cape Dec 27, 2019, 12:57 PM

#

Well, that's what I like programming for - you can do same stuff like in at least 3 ways

meager spade Dec 27, 2019, 12:58 PM

#

my way also sets it locally first, so you don't get delay

#

so it feels responsive

#

i personally do my sprinting via the CMC in c++

#

predicted

#

i mean either way those are all crude examples, and not something i would do

#

i would handle cases where you cant sprint

steady cape Dec 27, 2019, 1:02 PM

#

I think he got it, you can leave him alone now)

sturdy moat Dec 27, 2019, 1:08 PM

#

Hey all, I'm kinda stuck with making the server list work across all devices, can't find a way to make a game hosted on a windows pc appear on an android, does anyone know what i'm missing? (I'm using FreeAdvancedSession plugin)
Connecting directly with the IP works

steady cape Dec 27, 2019, 1:10 PM

#

I'm not a pro, but I think it's up to lack of Online Subsystem. Correct me if it's wrong

low lily Dec 27, 2019, 1:10 PM

#

@steady cape what is the real name of an action "Set Speed Server" (from your ss)

steady cape Dec 27, 2019, 1:10 PM

#

Set Speed

low lily Dec 27, 2019, 1:10 PM

#

thanks

steady cape Dec 27, 2019, 1:10 PM

#

This is a custom event

#

No, you didn't understand

sturdy moat Dec 27, 2019, 1:12 PM

#

@steady cape is the online subsystem set in the EngineDefault.ini ? I did google out some things pointing to that but adding it didn't work

[OnlineSubsystem]
DefaultPlatformService=NULL

steady cape Dec 27, 2019, 1:13 PM

#

Actually, you have to add any subsystem if you want to make such a list without direct connection

sturdy moat Dec 27, 2019, 1:14 PM

#

you mean that i need to use some sort of host that keeps the list of the games?

steady cape Dec 27, 2019, 1:14 PM

#

Your DefaultPlatformService=NULL pointing out that you don't have any

#

No, I mean, if you wish to create some sort of matchmaking, you should use any subsystem

low lily Dec 27, 2019, 1:15 PM

#

📎 Desktop_Screenshot_2019.12.27_-_14.15.32.03.png

steady cape Dec 27, 2019, 1:15 PM

#

Like you said, direct IP connection worked

low lily Dec 27, 2019, 1:15 PM

#

whats the problem?

steady cape Dec 27, 2019, 1:17 PM

#

@low lily, you picked event that attached to CharacterMovement component. You need to create Custom events instead

#

Look

#

Don't leave

low lily Dec 27, 2019, 1:17 PM

#

okay

steady cape Dec 27, 2019, 1:18 PM

#

You need to tap right mouse button on your blueprint
Type in field "Add Custom Event"
And press enter

karmic briar Dec 27, 2019, 1:18 PM

#

It said u need a target tho in those nodes

steady cape Dec 27, 2019, 1:18 PM

#

@karmic briar, that's not the case

#

He did system wrong

meager spade Dec 27, 2019, 1:18 PM

#

also the multicast is completely not needed

low lily Dec 27, 2019, 1:18 PM

#

but i have added custom event like that

meager spade Dec 27, 2019, 1:19 PM

#

http://www.interkaos.com/grabs/UE4Editor-Win64-DebugGame_PlqdIqnOLx.png < this is what he should be doing

steady cape Dec 27, 2019, 1:19 PM

#

Wair

#

Wait*

low lily Dec 27, 2019, 1:19 PM

#

im using 4.22.3 version tho

steady cape Dec 27, 2019, 1:19 PM

#

That doesn't matter

low lily Dec 27, 2019, 1:20 PM

#

ok

meager spade Dec 27, 2019, 1:21 PM

#

@low lily can you replicate my graph?

low lily Dec 27, 2019, 1:21 PM

#

i will try now

meager spade Dec 27, 2019, 1:21 PM

#

its simple

#

oops i missed something

low lily Dec 27, 2019, 1:22 PM

#

what have you missed

meager spade Dec 27, 2019, 1:23 PM

#

http://www.interkaos.com/grabs/mspaint_26DkIY39UD.png

#

bottom node

#

you need to set Sprinting on the server

steady cape Dec 27, 2019, 1:24 PM

#

https://youtu.be/sWYJrkBcy6I

YouTube

Властелин Криперов

2019 12 27 17 20 24

▶ Play video

#

Here

#

I did it

#

Step by step

#

Let it load

meager spade Dec 27, 2019, 1:24 PM

#

again, why the multicast?

sturdy moat Dec 27, 2019, 1:25 PM

#

@steady cape It appears that the list is working when the using the same OS, but when hosting on different OS's it doesn't work..

steady cape Dec 27, 2019, 1:25 PM

#

When I did it without multicast, it was flickering

#

@sturdy moat, then I don't know. Again, I'm not that pro

#

@low lily https://discordapp.com/channels/187217643009212416/221799385611239424/660110682741800960

sturdy moat Dec 27, 2019, 1:27 PM

#

it's okay i'll research more, should find the answer thanks anyway!

low lily Dec 27, 2019, 1:32 PM

#

Broo it works

#

Thank you so much

meager spade Dec 27, 2019, 1:32 PM

#

thing is

#

thats 2 rpc's just for a sprint :/

#

also you have no way to check if the player is sprinting

#

in things like animgraph, etc

#

http://www.interkaos.com/grabs/Qy7BrG4JU4.mp4 🤷

▶ Play video

fleet raven Dec 27, 2019, 1:39 PM

#

TIL you can click the little thing to change the type rather than mousing all the way over to the right

#

so many hidden tricks

meager spade Dec 27, 2019, 1:40 PM

#

?

#

oh

#

from my video

#

heh

fleet raven Dec 27, 2019, 1:40 PM

#

yes

meager spade Dec 27, 2019, 1:40 PM

#

yeah

#

i showed someone you can arrange arrays

#

they didnt even know that

#

if you right click

#

you can switch to array/single

#

just dont do it twice

#

http://www.interkaos.com/grabs/devenv_feySspEFqB.png :p

fleet raven Dec 27, 2019, 1:41 PM

#

br_galaxy_brain br_unreal ✅

meager spade Dec 27, 2019, 1:41 PM

#

might actually report that bug, not sure if its been reported

#

@fleet raven im lazy, any hidden tip/trick that speeds up things is handy

#

http://www.interkaos.com/grabs/2ShyZwG0FO.mp4

▶ Play video

fleet raven Dec 27, 2019, 1:43 PM

#

nice

meager spade Dec 27, 2019, 1:43 PM

#

thing is if you try to change it back

#

by right clicking a second time, boom

#

not sure if thats a recent thing

fleet raven Dec 27, 2019, 1:44 PM

#

that sprint is very sketchy

meager spade Dec 27, 2019, 1:44 PM

#

why?

fleet raven Dec 27, 2019, 1:45 PM

#

what if movement has to reconcile after changing the speed manually?

#

your rpc could also arrive out of order with the other move inputs

meager spade Dec 27, 2019, 1:45 PM

#

yeah

#

but thats the limit of BP

#

i did mine via the CMC

#

in the saved move

fleet raven Dec 27, 2019, 1:46 PM

#

I wonder if the new movement system they're making will be more extensible

meager spade Dec 27, 2019, 1:46 PM

#

the crash seems to be related to the FProperty change they did

#

not sure if its fully fleshed out yet lol

fleet raven Dec 27, 2019, 1:46 PM

#

using master branch? br_anim_thinking

meager spade Dec 27, 2019, 1:46 PM

#

yeah

fleet raven Dec 27, 2019, 1:46 PM

#

y

meager spade Dec 27, 2019, 1:46 PM

#

cause why not lol

fleet raven Dec 27, 2019, 1:46 PM

#

unstable

meager spade Dec 27, 2019, 1:47 PM

#

yeah but its not a production game

#

plus i wanted some 4.25 fixes

#

which is only in master for GAS

#

if i get my project to a working stable state, then ill stick to a release branch

gusty raptor Dec 27, 2019, 1:51 PM

#

Hi, so i was curious about this bool, it must be new ?

📎 unknown.png

#

anyone knows when its been added?

rotund sapphire Dec 27, 2019, 3:45 PM

#

[0168.37][305]LogNetTraffic: Error: ReceivedNextBunch: Reliable bunch before channel was fully open. ChSequence: 548, OpenPacketId.First: -1, OpenPacketId.Last: -1, bPartial: 0, Actor: None [UChannel] ChIndex: 15, Closing: 0 [UNetConnection] RemoteAddr: 127.0.0.1:7777, Name: IpConnection_0, Driver: GameNetDriver IpNetDriver_1, IsServer: NO, PC: PlayerCont
roller_C_0, Owner: PlayerController_C_0, UniqueId: NULL:DAMOKS-PC-6B4A2379497E71AE2C256D87ED44755C
[0168.37][305]LogNetTraffic: Error: UChannel::ReceivedRawBunch: Bunch.IsError() after ReceivedNextBunch 1

Just keep getting these lovely messages in 4.22 when player gets destroyed, and sometimes actors (even the pawn spawned and possessed on server) will not replicate to owning client, so autonomous has a static camera looking forward and don't see his pawn anywhere, cannot move etc (obviously). Remotes and server does see his pawn. Same goes for weapons and all kinds of dynamically created actors. I believe the problem might be related to owning client illegally holding references to actors such as the weapon and pawn might, therefore client start using an old pawn thinking he is the same thing (tho he is already being destroyed). Is there any known workaround for this type of issue?

sleek current Dec 27, 2019, 3:59 PM

#

Hey, how can I get a certain client camera location?

hoary lark Dec 27, 2019, 6:11 PM

#

Re the earlier conversation about sprinting... As Zeblote (and Kaos) mentioned, sadly it's impossible to "properly" implement features like sprinting in BP. You have to use CPP and FSavedMoves to actually do it the best way

#

@gusty raptor from a very simple Google search it's been around since at least 2017 but I don't know what it does

rotund sapphire Dec 27, 2019, 6:59 PM

#

I think you can use the custom moves in cmc to implement the sprint, tho it's not ideal since there is a nice walking logic in cmc already better to be utilized.

#

Also bps are terrible for this task, just put out there.

jolly siren Dec 27, 2019, 7:22 PM

#

Does anyone know how to setup our project for efficient steam updates? Currently they take ages even for tiny updates. I have our paks chunked but that isn't helping.

rotund sapphire Dec 27, 2019, 7:28 PM

#

Could it be the chunks are always unique (eg compression and encryption makes them very different files) and steam has no choice but to update all of them?

jolly siren Dec 27, 2019, 7:29 PM

#

It's possible. Is there anyway to see what steam is actually doing?

#

I looked for some logs but couldn't find much that was showing what it was doing during the update

rotund sapphire Dec 27, 2019, 7:33 PM

#

https://partner.steamgames.com/doc/sdk/api/debugging#command_line_parameters

#

have you try these?

jolly siren Dec 27, 2019, 7:59 PM

#

I have not, I'll check those out

rotund sapphire Dec 27, 2019, 8:08 PM

#

you can also try this seems to be undocumented on that api page but its in the exe somewhere you can get the complete cmd list i guess

📎 undocumented.png

slender yarrow Dec 28, 2019, 12:11 AM

#

I have finally been able to get my project working on AWS but now im having this weird problem with my ADS mechanics. You can seen especially at 14 seconds and on the ADS movement is extremely choppy and unsmooth. What could be the cause of this? Its totally fine in the editor and when i run as a standalone game. but now that the server is running on AWS this problem comes up 😡 . Picture is the code for my ADS
https://drive.google.com/file/d/1kt6ZM6O9zLHlq-Vk25xRviPCLigFdmo4/view?usp=sharing

📎 Untitled.jpg

Google Drive

2019-12-27 15-43-36.mp4

#

and maybe a question above all this: What is the proper way to do ADS aiming like this? I had this set up through event tick in c++ at one point and it was also rubberbanding.

placid narwhal Dec 28, 2019, 4:18 AM

#

@slender yarrow Is the timeline triggering multiple times ( maybe put a DoOnce in front of it and clear it on finished )

slender yarrow Dec 28, 2019, 6:46 AM

#

i want it triggering multiple times though. Its simulating a tick for that lerp going into SetRelativeTransform

hoary lark Dec 28, 2019, 9:00 AM

#

Was there any big reason behind having the server control whether you're aiming or not? Doesn't that seem a bit odd? What about having the client tell the server they are aiming and then having the server broadcast the change if you need to for animations, ignore the server's broadcast on the owning client

#

I don't know how timelines work but would this spawn multiple timelines fighting each other?

slender yarrow Dec 28, 2019, 9:27 AM

#

re-look at that event in the picture

#

Client

#

which is why this whole thing is strange

thin stratus Dec 28, 2019, 3:14 PM

#

Why is the server telling the client to start ads?

#

That already introduces a delay/lag

#

Client should do that stuff locally, based on an input. There should be no rpc between that

#

You can additionally tell the server that you are doing ads, for spread calculation or whatever you do then

fossil stratus Dec 28, 2019, 3:19 PM

#

Hey there,
I have a matchmaking system that works via a listen server. My gameplay is currently based on a dedicated server. How can I search for local dedicated servers or connect to them via bp?
Started the clients before via batchfiles with the ip of the server.

#

or can i switch over from listen to dedicated server, like searching and connecting to a host and when entering the game switching to the dedicated server?

bitter oriole Dec 28, 2019, 3:23 PM

#

Hard to understand what you're asking here. Listen server is another player like you hosting the game.

#

Dedicated server is something you run on your own server for players to connect to

fossil stratus Dec 28, 2019, 3:31 PM

#

Yeah I know my Gameplay is currently set up for dedicated servers
I followed along the Blueprint Multiplayer Playlist from Unreal Engine,
there they set up a host and find game so a listen server.
Now I need to change my client server relationship so that it would work properly on a listen server or find a way to search and find my dedicated server.
I'm normally a 3d Character Artist so i use blueprints for the whole project. 😄

bitter oriole Dec 28, 2019, 3:33 PM

#

Okay, but it's not clear what you're asking here. From the point of view of a client, playing on a dedicated vs listen server shouds not change much stuff.

#

Same for sessions etc

fossil stratus Dec 28, 2019, 3:36 PM

#

this is how the client joins the server how could i get my dedicated server into the blueprint session result (blue one)

📎 unknown.png

#

currently have it set up like that but it doesnt find my dedicated server 😦

📎 unknown.png

#

and at that point is there a better way to start up dedicated servers? I'm always doing it via a batchfile, like building the server or so..

steady cape Dec 28, 2019, 4:05 PM

#

Ok, guys, my widget doesn't work, but I really don't want to mess with it now, so'll do that later. Now my very last question is - how to replicate sounds and particles over network. I've tried to google, but only thing I found was about replicating all this things on pawn, e.g. remote-authority actor, and I need to replicate it on authority only actor (bomb, if you wish so)

fossil stratus Dec 28, 2019, 4:32 PM

#

Do sb has n idea why there is a preview server showing up instead of the 3rd client? This happens when I test in new editor window as listen server

📎 unknown.png

hoary lark Dec 28, 2019, 5:56 PM

#

because that's your server host in a new editor window?

#

do you know what a "listen server" is?

hoary lark Dec 28, 2019, 6:19 PM

#

(I don't know why it wouldn't be spawning your player, I don't think you provided enough info for anyone to help figure that out)

polar lotus Dec 28, 2019, 6:54 PM

#

How can I use make the ReplicationGraph plugin use the BasicRepGraph in it's plugin source folder as the RepGraph

sturdy moat Dec 28, 2019, 7:15 PM

#

Hey all, I already asked this, but maybe there's someone online who can help with this...
I'm having trouble with getting the game list with find sessions. The problem is when i host LAN on android devices the sessions come up like they should, but when i host using android(client) and windows(server), the app suddenly can't find any hosted sessions. Did anybody encounter this problem? (Direct connect with an IP works)

I'm at a point where googling became too annoying...

polar lotus Dec 28, 2019, 7:49 PM

#

why does my character do this whenever i'm not the server
https://gyazo.com/e8c98e842e0d7c2be14e507f7f11f57c
he jitters a lot
He's still doing the correct animation but he jitters when not server

Gyazo

▶ Play video

rare gyro Dec 28, 2019, 8:19 PM

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@polar lotus I've experienced the same issue when trying to implement pitch offset for turn in place. Didn't find a fix, but the jittering only happens in editor/standalone.

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@polar lotus Also, check out ShooterGame's ReplicationGraph implementation, iirc a little bit of it is out of date with 4.23-4.24, but you can patch it up and try it out.

hoary lark Dec 28, 2019, 9:05 PM

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usually happens because the server and client are "fighting" over variable values. you're calculating it locally on the client but the server is calculating and overriding the client too.

polar lotus Dec 28, 2019, 10:02 PM

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I want to use the BasicReplicationGraph that's already In the RepGraph's source folder

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How do I do that?

full elbow Dec 29, 2019, 1:44 AM

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anyone have any resources they can direct me to for STUN/TURN/ICE implementations?

twin juniper Dec 29, 2019, 3:29 AM

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I am replicated my movement and character, it works in keyboard but my virtual joystick controls only player 1 even in the both screens, any idea why?

📎 unknown.png

slender yarrow Dec 29, 2019, 4:54 AM

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@thin stratus So I converted my ADS system to run directly on the client from the Right Mouse input. And the rubberbanding is still happening 😵

hoary lark Dec 29, 2019, 9:54 AM

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That wasn't your only problem though, you were also initiating multiple timelines setting your ADS alpha. Maybe you'll find out more to fix still but those were the two big "?" to start IIRC

thin stratus Dec 29, 2019, 10:42 AM

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It's also possible they are still doing things wrong. :P

steady cape Dec 29, 2019, 2:56 PM

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https://discordapp.com/channels/187217643009212416/221799385611239424/660513615811444775

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Now I'm having a fucking rage quit. I DUG into ContentExamples, found a bluepring in which particle was replicating good, and my bomb DONE THE SAME WAY. AND PARTICLES STILL NOT REPLICATING

gusty slate Dec 29, 2019, 3:09 PM

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Hello,
Let's say that I don't want to use DataTables and I need to store an Array of Global data structs, like for example Weather types and information about them. Where should I store that Array variable if it is server only? And where if it can be fetched by Clients?

steady cape Dec 29, 2019, 3:14 PM

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I think it's better to store it in a GameState

gusty slate Dec 29, 2019, 3:19 PM

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Hmm wouldn't a GameMode be better then? GameState is both client and server side?

steady cape Dec 29, 2019, 3:25 PM

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It kinda depends wherether you want to show clients info from there or not

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If no - use GameMode

gusty slate Dec 29, 2019, 3:25 PM

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I see

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What if it is information the client might need? In the example of Weather type definitions

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Each client might need that information for their AI for example

steady cape Dec 29, 2019, 3:26 PM

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If clients might need this - use GameState

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GameModes exists only serverside, meaning that any variables can't be passed to clients

gusty slate Dec 29, 2019, 3:27 PM

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I see. But I can make accessor functions?

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I actually started getting myself familiar with networking in UE but the project fell through, so I'm out of touch 😛

steady cape Dec 29, 2019, 3:31 PM

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I guess, you maybe can retrieve data from GameMode via RPC, but I think that isn't comfortable. I think it's just better to define that variable in GameState and just pull info whenever you want without server-client transmisson intending

gusty slate Dec 29, 2019, 3:45 PM

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Alright, thanks for the tips 👍

raven viper Dec 29, 2019, 5:03 PM

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@gusty slate Why would you skip on DataTables that could be easily be accessed anywhere, and instead go with a hardcoded version?

gusty slate Dec 29, 2019, 5:05 PM

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I wouldn't call it hardcoded.
But there are specific use cases where I simply rather have the key to each data be a class or an enum

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It's much more convenient to code with that, whether it's functions, structure of other data or simply for longevity if at a certain time I need to change the name of the key

raven viper Dec 29, 2019, 5:06 PM

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You could easily create wrapper functions that automatically generate your data tables with row names that match your keys, so you can easily fetch or update given keys. Data tables can be modified runtime, so that's not an issue here

gusty slate Dec 29, 2019, 5:07 PM

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You mean create datatables at runtime? Doesn't that defy the point?

raven viper Dec 29, 2019, 5:08 PM

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You can create them runtime as well yes, I have a use-case in the project I'm working on at the moment, where I create data tables "runtime", but I meant modify. AKA you can swap around keys etc.

gusty slate Dec 29, 2019, 5:09 PM

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I meant that for predefined data, it defies the point to create them at runtime

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because the data would have to be somewhere else already

raven viper Dec 29, 2019, 5:09 PM

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Can you please elaborate what kind of data are you storing there, and where are you using them? I'm pretty sure I don't get what you want to achieve here

gusty slate Dec 29, 2019, 5:12 PM

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I've been through quite a bit of usecases, I'll give you an example of a weapon slot. I rather fill that variable with the weapon's class and have a Data structure where the Key is the Class rather than an ID

raven viper Dec 29, 2019, 5:13 PM

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So for instance, you have a TMap<AMyWeapon, FMyWeaponData> WeaponData; to get the data for a given weapon instead of looking for an ID or a Name in a DataTable?

gusty slate Dec 29, 2019, 5:13 PM

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Yes

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I find it more convenient and not only for retrieving the data

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But any other entity that needs to hold that information or function that has it as a parameter

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I can simply use the class as a key type

raven viper Dec 29, 2019, 5:14 PM

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That's valid, as long as it's a managable length. There is a reason why MMOs resort to databases for items/spells/etc

gusty slate Dec 29, 2019, 5:15 PM

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Indeed yes

raven viper Dec 29, 2019, 5:15 PM

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I wouldn't be manually typing in even 30 items/weapons etc, when I could just grab them from anything else, and push them into a DT

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Welp in that case:

GameMode for server only
GameState if clients need it

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If it's not gameplay sensitive, GameState will do just fine

gusty slate Dec 29, 2019, 5:16 PM

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Thanks.
What do you mean manually typing?

raven viper Dec 29, 2019, 5:16 PM

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I mean pushing the plus button next to the map in an editor to set up the variables 😄

gusty slate Dec 29, 2019, 5:18 PM

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Yeah. I know that databases of any real length use integers as primary keys because it's really heaps faster. And the structure of databases, in this case datatables is much better for data entry

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But it's so nice to have that convenience of custom types to retrieve data

raven viper Dec 29, 2019, 5:19 PM

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Right now I'm working on a presentation project, where there are actors on the level, consisting of 30-40 somewhat components, and these components need to swap meshes and materials (only some meshes, only some material indexes) so designer-wise it would be a pain in the a** to manually enter the data, so I made a small little tool, that grabs singular instances from the level of said actors, and fills up the whole DataTable with the meshes, materials and their indices, the default material sets and mesh pairs, etc, instead of manually setting stuff up.

gusty slate Dec 29, 2019, 5:20 PM

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That's quite different than having items and having no other choice than entering descriptions/names/other data

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hehe

raven viper Dec 29, 2019, 5:20 PM

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Yeah but you know how it is with programming. If it takes longer than 5 minutes, automate it.

gusty slate Dec 29, 2019, 5:20 PM

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Indeed yeah

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It would be nice to have those combinations have an enum for example as a key don't you think? And whenever you need a certain combination, you use a dropown enum instead of requiring an integer ID

raven viper Dec 29, 2019, 5:22 PM

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Yeah at least we got row indices now 😄

gusty slate Dec 29, 2019, 5:23 PM

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xD

raven viper Dec 29, 2019, 5:23 PM

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Good 'ol days of grinding FNames through a DT to find what you need.

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Also quick question, people here are smart and there's no exact topic for this question.

I want my project to start in a pure black screen, and fade in, because I'm swapping pawns around. Having a 0.00001s camera fade at the start into pure black still flashes, and since I'm swapping pawns around, I can't just set the pawn camera exposure to a given value. Any ideas?

gusty slate Dec 29, 2019, 5:37 PM

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You can use UMG

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A UI panel (Widget) that has a black image that fades its opacity

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@raven viper

raven viper Dec 29, 2019, 5:40 PM

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It's not just desktop but VR as well so sadly that ain't gonna work.

gusty slate Dec 29, 2019, 5:41 PM

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I have no experience with VR. And this might be ugly, but could it work with literally a matte black object literaly in the face of the camera?

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Anyway, good luck 🙂

raven viper Dec 29, 2019, 5:48 PM

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SetManualCameraFade seems to do the job as opposed to REALLY QUICK fade out, so I'm gonna stick with this for now and will see later if I can come up with a better solution

desert glacier Dec 29, 2019, 6:38 PM

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Hi

#

I want To open map on the server no on client ? How make ?

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?

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@everyone

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By what method ?

hoary lark Dec 29, 2019, 7:34 PM

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utried

trim skiff Dec 29, 2019, 8:00 PM

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I am trying to set up a player's nickname in game that will be displayed in the UI. However, no matter what I do, the player name remains at its default "Desktop something" name. So far I tried putting the name in my PlayerState, but when the player joins, the game displays the default name instead of the custom one.

APlayerState.h:

    UFUNCTION(BlueprintCallable)
    virtual void SetPlayerName(const FString& S) override;

    UFUNCTION(BlueprintCallable, Server, Reliable, WithValidation)
    virtual void SetName(const FString& NewName);

APlayerState.cpp:

void ASPlayerState::SetPlayerName(const FString& S)
{
    if (Role < ROLE_Authority)
    {
        SetName(S);
    }
    Super::SetPlayerName(S);
}

void ASPlayerState::SetName_Implementation(const FString& NewName)
{
    SetPlayerName(NewName);
}

bool ASPlayerState::SetName_Validate(const FString& NewName)
{
    return true;
}

I then need to store it somehow somewhere so that every server I join, it will receive that name, but I am not sure how to do it. Any help?

worthy perch Dec 29, 2019, 8:03 PM

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Have you already looked into to Online subsystems?

trim skiff Dec 29, 2019, 8:06 PM

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I've tried to avoid subsystems for now.

raven viper Dec 29, 2019, 8:07 PM

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@trim skiff where are you getting the custom name from? Player inputs it before joining a server?

trim skiff Dec 29, 2019, 8:08 PM

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Yes. Player does the input via widget blueprint in menu.

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Then, he joins a session.

raven viper Dec 29, 2019, 8:09 PM

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Alright. When your player joins the server, he will be created a new player controller, a new player state, etc. That means you can't put it in there, because you will be assigned a brand new one.

However there is one magical class: GameInstance.

Your game instance is a single-created, persistent, non-replicated class, that gets created when you start the game and destroys when you close the game. This means, it's a perfect place to store variables, that you are inputting on one end, and want to keep whatever happens.

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In the menu, get the player name, save it in the game instance. When the player joins a server, make that player pass it's name from it's own game instance to the server, where the server sets the variable in the PlayerState, so that it can be replicated later to all

trim skiff Dec 29, 2019, 8:11 PM

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I am storing it in the GameInstance currently, yes.

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However, from the looks of it, it seems like I am not sending it from the GameInstance to the Server properly.

raven viper Dec 29, 2019, 8:11 PM

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You use CPP, so I'm gonna make this easy for ya 😄

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I have a same setup where players pick a name and a color, then join a server, and it get's shown in UMG

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I'm using the player pawn/character to pass the variables, so this code is from my PlayerPawn BeginPlay:

if (IsLocallyControlled()) {
  GI = Cast<UVRGameInstance>(GetWorld()->GetGameInstance());
  if (GI) {
    Server_SendPlayerInfo(GI->PlayerName, GI->PlayerColor);
  }
  else {
    UE_LOG(LogTemp, Warning, TEXT("Cannot cast to GameInstance"));
  }
}

The Server_SendPlayerInfo is naturally a RunOnServer event (Reliable), which just sets two replicated variables inside the PlayerPawn:

void ADesktopChar::Server_SendPlayerInfo_Implementation(FName inPlayerName, FLinearColor inPlayerColor)
{
  PlayerName = inPlayerName;
  PlayerColor = inPlayerColor;
  Multi_UpdatePlayerInfo();
}

And Multi_UpdatePlayerInfo is a multicast reliable event, that sets the TextRenderComponent to the PlayerName variable, and the TextRenderColor to the PlayerColor variable.

#

Better yet you can move the top code to a Possessed event to make sure the controller of the player actually owns the pawn already, and can access the variables needed

trim skiff Dec 29, 2019, 8:19 PM

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So you have extended your gameinstance.

raven viper Dec 29, 2019, 8:19 PM

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I just added 2 variables in it, nothing else

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When I press join in the menu, it saves the two variables then starts the session join

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It's just pretty much:

Save Vars in Instance -> When Joined tell Server about the new vars (via param) -> Server updates vars with the params -> Multicast does whatever you want to do.

twin juniper Dec 29, 2019, 8:37 PM

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How can I replicate "virtual joystick"?

desert glacier Dec 29, 2019, 9:36 PM

#

?

#

How make ?

queen onyx Dec 29, 2019, 11:40 PM

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@twin juniper why would you do that?

twin juniper Dec 29, 2019, 11:41 PM

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My project is mobile and when I activate touch interface it controls only server even in the client's tab

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Keyboard controls are replicated and working well but when I try to rotate and move with virtual joystick, server moves

queen onyx Dec 29, 2019, 11:43 PM

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This is because SVirtualJoystick always uses 0 as the controller ID

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But this issue is only in the Editor because the other tab has a different ID

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On different devices 0 is always the local player @twin juniper

twin juniper Dec 29, 2019, 11:45 PM

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So, when I export the game problem will be solved. I think I can add "editor only" controls to test my game

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Thanks @queen onyx you're awesome

desert glacier Dec 29, 2019, 11:47 PM

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how can i do ?

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Please

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Help me

queen onyx Dec 29, 2019, 11:48 PM

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@desert glacier What is the problem?

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What are you trying to do?

desert glacier Dec 29, 2019, 11:48 PM

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Wait

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I want To open map on the server no on client ? How make ?

queen onyx Dec 29, 2019, 11:49 PM

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What is your current setup?

desert glacier Dec 29, 2019, 11:50 PM

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Not of code

queen onyx Dec 29, 2019, 11:51 PM

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You would check from your menu if you're the Server (Role == ROLE_Authority) and if you are you would open the level with ?listen and on the client you would open the ip

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In Blueprints this would be the Has Authority switch, in c++ you would do if (Role == ROLE_Authority) @desert glacier

desert glacier Dec 29, 2019, 11:53 PM

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I want that when I open a level at the server, that this level is not as open at the client

queen onyx Dec 29, 2019, 11:53 PM

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How do you open the level?

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And where do you open the level?

desert glacier Dec 29, 2019, 11:56 PM

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In the player character BP

queen onyx Dec 29, 2019, 11:56 PM

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with an OpenLevel node?

desert glacier Dec 29, 2019, 11:56 PM

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Yes

queen onyx Dec 29, 2019, 11:57 PM

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so do this

📎 unknown.png

desert glacier Dec 29, 2019, 11:58 PM

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Already try

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But nothing, none

queen onyx Dec 29, 2019, 11:59 PM

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What do you mean?

desert glacier Dec 29, 2019, 11:59 PM

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It don't works

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I already tried this method but it does not work

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give me another method please

#

@everyone

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It is very important for me

queen onyx Dec 30, 2019, 12:06 AM

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@desert glacier what isnt working?

desert glacier Dec 30, 2019, 12:07 AM

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Your method on the picture

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So how make ?

dull lake Dec 30, 2019, 12:08 AM

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I setup a line trace based firing system with a crosshair which worked great in first person until I had to do a add local rotation to the camera to fix a different issue i was having. The line trace is using the camera's location as a start point. On the server it works fine but on clients it doesn't. Anybody got suggestions to get the crosshair and linetrace in sync again?

desert glacier Dec 30, 2019, 12:12 AM

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Put à screen

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Your custom Event must to be run on server with an switch has autority node

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You will try @dull lake

queen onyx Dec 30, 2019, 12:18 AM

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@desert glacier I think i see your problem

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Try creating a custom event and set it to server

desert glacier Dec 30, 2019, 12:20 AM

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No

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'there I was talking to scott

hoary lark Dec 30, 2019, 12:22 AM

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your first problem is that you can't do what you want to do. unreal isn't made for it. sorry. your second problem is that you keep attempting to ping everyone, please stop that, it is disabled on this server so it does nothing and if it did work it would be !!!EXTREMELY!!! rude

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i'm not sure if there are any workarounds, for example it might be possible to additively load a map on a client without loading it on the server... but I have not tried and don't know.

queen onyx Dec 30, 2019, 12:23 AM

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What are you trying to do?

hoary lark Dec 30, 2019, 12:23 AM

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he's trying to have the server and clients on different levels

desert glacier Dec 30, 2019, 12:24 AM

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so how did epic games do with fortnite?

hoary lark Dec 30, 2019, 12:24 AM

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ok, now i'm confused

queen onyx Dec 30, 2019, 12:24 AM

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I have no idea what he is trying to do. He asked how to run code only on server and you can do that with role checks

desert glacier Dec 30, 2019, 12:25 AM

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By example, the server is in menu and the clients are in game

queen onyx Dec 30, 2019, 12:25 AM

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You mean like a lobby system?

desert glacier Dec 30, 2019, 12:26 AM

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With an switch has autority node, there is nothing, it don't works

dull lake Dec 30, 2019, 12:26 AM

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Thanks was having a brain fart.

desert glacier Dec 30, 2019, 12:26 AM

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@dull lake it works ?

queen onyx Dec 30, 2019, 12:27 AM

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In fortnite the dedicated server cant be in a menu?!

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I still dont know what you're trying to do?

desert glacier Dec 30, 2019, 12:27 AM

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He can

queen onyx Dec 30, 2019, 12:28 AM

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?

dull lake Dec 30, 2019, 12:28 AM

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Yes it just feels weird having an axis binding always calling a server thing but different headache for a different day.

queen onyx Dec 30, 2019, 12:28 AM

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Why should the dedicated server be in a menu? It is dedicated and running standalone there is no player controlling it

desert glacier Dec 30, 2019, 12:29 AM

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for example server leaves the session by leaving the menu but it does not affect other players

queen onyx Dec 30, 2019, 12:30 AM

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why would a dedicated server leave?

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A dedicated server isnt a person

desert glacier Dec 30, 2019, 12:30 AM

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in my game, it's a player create a session and the others join his session

bitter oriole Dec 30, 2019, 12:31 AM

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No dedicated server there at all then

queen onyx Dec 30, 2019, 12:31 AM

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Then it isnt a dedicated server

hoary lark Dec 30, 2019, 12:31 AM

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does fortnite even do listen servers?

queen onyx Dec 30, 2019, 12:31 AM

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no

bitter oriole Dec 30, 2019, 12:31 AM

#

Nope

queen onyx Dec 30, 2019, 12:31 AM

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Like I said dedicated servers

desert glacier Dec 30, 2019, 12:31 AM

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My game is not server dedicated

hoary lark Dec 30, 2019, 12:32 AM

#

part of me wonders if you're trying to implement "Host Migration"

queen onyx Dec 30, 2019, 12:32 AM

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Then you cant leave with your server and let the clients still be there @desert glacier

hoary lark Dec 30, 2019, 12:32 AM

#

but I still don't know 😄

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with Host Migration, the host (server) can quit and one of the other clients will take over as the host. does that sound like what you want? lol

desert glacier Dec 30, 2019, 12:32 AM

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Alors it is not possible ?

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Yes @hoary lark

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But how make ? @hoary lark

bitter oriole Dec 30, 2019, 12:34 AM

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It's quite simple :

listen = one player hosts, everyone is kicked if his network goes down or he exits the level or game
dedi = a dedicated server you own hosts, sessions would be created by the dedi when it starts and player would find it

hoary lark Dec 30, 2019, 12:34 AM

#

I don't know 😄 I don't think Unreal has Host Migration built-in as a feature, you'd have to completely make it yourself.

bitter oriole Dec 30, 2019, 12:35 AM

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Host migration from a hosting player to another is not really a serious idea

#

Any other solution will be easier

desert glacier Dec 30, 2019, 12:35 AM

#

I don't want a dedicated server

queen onyx Dec 30, 2019, 12:36 AM

#

I still dont know what you're trying to do?

bitter oriole Dec 30, 2019, 12:36 AM

#

Then one player hosts, and everyone is kicked if his network goes down or he exits the level or game

#

End of story

queen onyx Dec 30, 2019, 12:36 AM

#

Why would you need host migration for your MENU?

hoary lark Dec 30, 2019, 12:36 AM

#

english clearly is not his first language. he was making the example if the host left to the menu, how could other clients keep playing. he wants host migration. we've gotten this far 😄

desert glacier Dec 30, 2019, 12:37 AM

#

In watch dogs 2 game, there is host migration

bitter oriole Dec 30, 2019, 12:37 AM

#

It's also not an UE4 game

queen onyx Dec 30, 2019, 12:37 AM

#

@hoary lark ok

desert glacier Dec 30, 2019, 12:37 AM

#

@bitter oriole i know

bitter oriole Dec 30, 2019, 12:38 AM

#

You can't add host migration to UE4 with listen servers.

#

I mean, maybe you can but this is something you'll spend 3 years on with your custom fork of UE4.

hoary lark Dec 30, 2019, 12:39 AM

#

unfortunately the real answer to your question @desert glacier is that, if you have to ask how to do this, you are not ready to attempt it. this isn't something you will be able to create in a few days. if it is absolutely critical to your game... look around at other engines first

bitter oriole Dec 30, 2019, 12:39 AM

#

The engine's design actively prevents this from working - non-hosting players don't have the information required to actually move to a server state.

hoary lark Dec 30, 2019, 12:39 AM

#

(I think) Unity has it but Unity is missing just about everything else so 🤪

bitter oriole Dec 30, 2019, 12:40 AM

#

If you need Fortnite-like gameplay you also need Fortnite-like design.

#

Which is dedicated servers

desert glacier Dec 30, 2019, 12:40 AM

#

So i Will try dedicated server if possible

hoary lark Dec 30, 2019, 12:42 AM

#

if you have a dedicated server then any player can join/leave the game without interrupting it. the only time the game dies is when the server dies

desert glacier Dec 30, 2019, 12:42 AM

#

But with a dedicated server, how create an session ?

queen onyx Dec 30, 2019, 12:44 AM

#

If you have a save system you could make a simple host migration.

before the server leaves after pressing the leave button the world gets saved to all clients
one client gets chosen as a new hoster and host the new listen server with the latest save
the other clients join the new host

desert glacier Dec 30, 2019, 12:44 AM

#

With a save game ?

queen onyx Dec 30, 2019, 12:46 AM

#

SaveGame only handles the actual saving to disk, you would need to make a system that collects all your games vars (location, etc...) and restores them

desert glacier Dec 30, 2019, 12:47 AM

#

Yes but after how make host migration ?

#

how and where to put it all?

queen onyx Dec 30, 2019, 12:48 AM

#

When the server leaves a new host gets chosen which creates a new listen server with the latest save and the other clients connect to it

desert glacier Dec 30, 2019, 12:50 AM

#

how to choose a new host ?

queen onyx Dec 30, 2019, 12:51 AM

#

For example the playercontroller with the highest id or serverplayercontroller id (0) + 1

desert glacier Dec 30, 2019, 12:52 AM

#

I don't understand

queen onyx Dec 30, 2019, 12:52 AM

#

You need to do many thing by your own for example letting the other clients know what ip the new hosting player has

desert glacier Dec 30, 2019, 12:53 AM

#

Ok i Will try tomorrow

#

Thanks

#

How activate the dedicated server in game ?

queen onyx Dec 30, 2019, 12:55 AM

#

What do you mean by "activate"

desert glacier Dec 30, 2019, 12:56 AM

#

checked the dedicated server box

hoary lark Dec 30, 2019, 12:57 AM

#

a dedicated server is a separate EXE you run... if you wanted you could probably code your game to execute it for you

desert glacier Dec 30, 2019, 12:58 AM

#

Ok i Will try

queen onyx Dec 30, 2019, 12:58 AM

#

If you check the dedicated server box in the PIE options there is a "invisible" server and both windows are clients

desert glacier Dec 30, 2019, 12:59 AM

#

Ok OK i know

potent prairie Dec 30, 2019, 1:10 AM

#

You also need to use the source version from github to compile the dedicated server as well

cedar finch Dec 30, 2019, 5:22 AM

#

What's the most optimal way to replicate an actor that moves and spins? I have spinning blades traps I want to be able to move around

fleet raven Dec 30, 2019, 6:01 AM

#

like a sawblade?

#

the best solution of course is to not replicate the spinning

#

if it's just round then every client can just spin a mesh on it by itself

cedar finch Dec 30, 2019, 6:30 AM

#

Yea I figured the spinning wouldn't need to replicate unless I make a slow spinning one where players have to time it just right to get through it. But really I just wanna know how to make them move and replicate in an optimized way. I tried moving them through a timeline and a spline by setting the location in a rpc but it lagged so I changed it to set the location in a repnotify variable and it's a little better but it still lags sometimes

fleet raven Dec 30, 2019, 6:45 AM

#

if you want it to be smooth you gotta interpolate the position on the client

hoary lark Dec 30, 2019, 6:45 AM

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One possibility: If the position can be represented in a "deterministic" way, like a position percentage with looped predetermined movement, I would just simulate it on both client and server (don't replicate movement) and I would occasionally RPC the current position to the client. The client could probably smoothly interpolate the difference, like if your ping suddenly reduced by 50 then the client could slow down or speed up their simulation slightly until client time matched the last received server time. If any of that makes sense lol

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I might be reinventing the wheel depending on what you're working with

cedar finch Dec 30, 2019, 7:06 AM

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Yeah I'm just moving things in a set, predetermined path. It doesnt change or anything. For example I have a few lasers in a hallway that move back and forth and players have to time it right to get through. I also have spinning blades traps that do the same. Thanks for the suggestions. I'll look into it and try it out. I'm not sure exactly how interpolation is setup but I'll read about it.

mellow cipher Dec 30, 2019, 7:14 AM

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

Has anyone tried to get ping from lobbies using this? It's still returning 9999 for me

Steam Sockets

How to enable the Steam network protocol layer for Unreal 4 projects.

chrome bay Dec 30, 2019, 9:31 AM

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You can't get ping from lobbies natively, you have to manually do an icmp echo to the IP address

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Even then, it won't necessarily match the ping you get in-game, but it's usually indicative enough.

cedar finch Dec 30, 2019, 9:41 AM

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So I'm not sure if adding in this Interpolation node will help with my network replication optimization. Will this make it's movement look smoother for clients? https://i.gyazo.com/c18b49f0a45aa6d3d63e28671c312178.png
https://i.gyazo.com/ae79e7e4805300659c5c600ca75c9358.png

mellow cipher Dec 30, 2019, 9:49 AM

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@chrome bay how can you echo it if it's a steamid address?

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Other functionality, including ping calculation, is provided through existing network interfaces in UE4.Based on that I thought it had native implementation

chrome bay Dec 30, 2019, 9:52 AM

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In our case we use the HostAddr from FOnlineSessionInfoSteam - but we had to modify the engine to give us a way to return that more easily

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That contains the IP and port

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We modified the base OSS to have an extra method TSharedPtr<class FInternetAddr> GetSessionHostAddress(const FOnlineSessionInfo& SessionInfo) - then override that again in the Steam OSS.

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That way the game-side stays platform agnostic

mellow cipher Dec 30, 2019, 9:56 AM

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Thanks for the info

rich ridge Dec 30, 2019, 10:10 AM

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@chrome bay is there a way that I can get ping of every client

chrome bay Dec 30, 2019, 10:10 AM

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In the game the ping is already available from the player state

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That's that players ping to the Server

rich ridge Dec 30, 2019, 10:10 AM

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Ok that's enough for my requirement

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Thanks

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Does AnimNotify run on server or client. If only on client can we make them execute on server

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I have few events that gets triggered from AnimNotify and then they trigger another GameplayAbility. Since gameplay ability are granted by server only it makes sense to run the AnimNotify on server itself

chrome bay Dec 30, 2019, 10:52 AM

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Not unless you're running animations on the server

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Which usually you don't because it's a huge performance concern

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Either way anim notifies are entirely local, and are called when the animation is played.

rich ridge Dec 30, 2019, 11:24 AM

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@chrome bay so how do I call the ability when AnimNotify runs locally and it doesn't have authority

chrome bay Dec 30, 2019, 11:26 AM

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I'm not really familiar with GAS but my understanding is you execute the ability on the client, then that client tells the Server what they did and the server either verifies or rejects it - that is all automatic.

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So it shouldn't matter

rich ridge Dec 30, 2019, 11:28 AM

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I need to validate this

chrome bay Dec 30, 2019, 11:28 AM

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Well that's how it's supposed to work, because that's the basis of prediction

rich ridge Dec 30, 2019, 11:29 AM

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Prediction is entirely something else, I m activating the ability on AnimNotify

chrome bay Dec 30, 2019, 11:29 AM

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Yeah and the activation should be called on the client that owns that object

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So you shouldn't need to run animations on the server

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Even if you did, the animations wouldn't be in sync anyway - so what the client sees and what actually happens would be entirely disconnected

rich ridge Dec 30, 2019, 11:30 AM

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I m not running animation on server, I was just curious that I could get only AnimNotify event on server that's it

chrome bay Dec 30, 2019, 11:30 AM

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You will get anim notifies on the server if the server is running animations, otherwise you won't.

rich ridge Dec 30, 2019, 11:30 AM

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Ok

chrome bay Dec 30, 2019, 11:31 AM

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However, since most servers are single-threaded and can't cull things it is generally not a good idea to do so

rich ridge Dec 30, 2019, 11:32 AM

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I understand your point

dapper hatch Dec 30, 2019, 12:20 PM

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Hi everyone I really need help... I have been trying to fix my issue for now 2 days and a half and can't really find something that helps... 😕. So I am trying to get the players name when they type the name they want in a text box (in the menu) But whenever I change level, It's like if the variable has restarted or somethings like this... Because the variable is not the name that they have set in the menu... https://gyazo.com/545616994b8753cd3fb6646c62da8bb3

Gyazo

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https://gyazo.com/ff8639a64feb07ce88759c735977b0cd

Gyazo

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When I press "T", the variable "name" is set to nothing..

rich ridge Dec 30, 2019, 12:21 PM

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@dapper hatch you should have these information in player state which can survive the level restart and retain your vairable and it's value

dapper hatch Dec 30, 2019, 12:22 PM

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How can I store this "name" variable in the player state?

rich ridge Dec 30, 2019, 12:23 PM

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Extends player state class and add the variable in player state class

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And make sure you set this player state in game mode

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Your problem is whenever you open a level you spawn a character that is your create new, it doesn't know about your old character and it's values

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You need to retain them

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So player state or game instance will work in your case

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But to be precise player state is best place to store

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Like you added name in character class likewise add name in player state class

dapper hatch Dec 30, 2019, 12:27 PM

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hum.. I'l give it a try. I haven't really played with gamemode and player state..

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But thx mate 🙂

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i'l try

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But would this work even if when i change level I change gamemode too?

rich ridge Dec 30, 2019, 12:29 PM

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https://docs.unrealengine.com/en-US/Programming/UnrealArchitecture/index.html

Unreal Architecture

Explanations of the basic gameplay elements, Actors and Objects.

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In game mode you can specify which player state to refer

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So changing game mode should not be a problem

dapper hatch Dec 30, 2019, 12:36 PM

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Hum... How do I extend the player state class tho?

rich ridge Dec 30, 2019, 12:44 PM

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Create new class and make it's super class to UPlayerState

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In create class wizard search for player state

dapper hatch Dec 30, 2019, 12:47 PM

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this? https://gyazo.com/9fc339427f9e9ae41af2210dd745c3df

Gyazo

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sry btw its hard for me to understand... im pretty much new to all of this

rich ridge Dec 30, 2019, 1:04 PM

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Yes that's it

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And set this player state into game mode

dapper hatch Dec 30, 2019, 1:07 PM

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Ok

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And then to set the name that my player has entered in the menu, to the name of the player in the player state would this work?

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https://gyazo.com/9738410b839f0669f6e7110b76fd8ca5

Gyazo

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@rich ridge

rich ridge Dec 30, 2019, 1:56 PM

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Keep trying u will get

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This is the way how will learn

dapper hatch Dec 30, 2019, 1:56 PM

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facts

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ive tried and it didnt work tho.. I rly dont know why. everything looks completely fine.

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its like if the variable that I have set in the player state doesnt survive when I change map

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Even tho I have changed the player state to this one on both map

rich ridge Dec 30, 2019, 1:58 PM

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Have you set the player state in game mode

dapper hatch Dec 30, 2019, 1:58 PM

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yes

rich ridge Dec 30, 2019, 1:58 PM

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Let me open my UE4

dapper hatch Dec 30, 2019, 1:58 PM

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alright 🙂

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tysm btw 🙂

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ive been looking for 2 days now...

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I was desperate

rich ridge Dec 30, 2019, 2:38 PM

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@dapper hatch r u there

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I was wrong partially.

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The player state is used to retain data of players who need to respawn after they die, example MOBA games, when a hero dies he will re spawn with already gained attributes, so we store those attributes in player state.

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The problem with player state is that once you do Local or server Travel (in simple words open new level ) the data inside of player state is cleared

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And the GameState also behaves in the same manner. So GameState and PlayerState are out of scope.

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So we are left with GameMode and GameInstance.

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If the game happens to be single player use GameMode

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if the its multiplayer use GameInstance.

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since gamemode exists at server in case of multiplayer games, but game instance exists at client side.

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I apologize for wrong information earlier.

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Please extend GameInstance and do the same things

winged badger Dec 30, 2019, 2:59 PM

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@rich ridge you can just use CopyProperties on the PS to persist the data you need

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doesn't even matter if PS is of a different class on the start/end level

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server-side, the new PS after travel will still have the data

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then you just rely on normal replication to propagate it to clients

rich ridge Dec 30, 2019, 3:03 PM

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Ohh nice I didn't know that

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Will the CopyProperties copy whole object.

winged badger Dec 30, 2019, 3:05 PM

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no

noble oxide Dec 30, 2019, 3:05 PM

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it will copy properties you provide there

winged badger Dec 30, 2019, 3:05 PM

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it will copy what you tell it to copy

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you have pointers to both old and new PS available

rich ridge Dec 30, 2019, 3:06 PM

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@winged badger so it forms a linked list as I keep opening the new levels

winged badger Dec 30, 2019, 3:06 PM

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it doesn't

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old PS is gone right after CopyProperties call

rich ridge Dec 30, 2019, 3:07 PM

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Just now u said i have both old and new PS

winged badger Dec 30, 2019, 3:07 PM

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yes, as function parameters

rich ridge Dec 30, 2019, 3:07 PM

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Old PS must be having Old PS

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And that old PS can have further old PS

winged badger Dec 30, 2019, 3:08 PM

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and then the old PS is explicitly destroyed

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the PS doesn't have a pointer to old PS

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the CopyProperties function has APlayerState* OldPS and APlayerState* NewPS in arguments

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as it is called at the time when both still exist

rich ridge Dec 30, 2019, 3:09 PM

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Ok I get it, so it's a linked list of fixed size 2

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That's it

winged badger Dec 30, 2019, 3:09 PM

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its not a linked list at all

rich ridge Dec 30, 2019, 3:10 PM

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But it's a node of Linked list correct

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Having old pointer which behaves as next or previous

winged badger Dec 30, 2019, 3:11 PM

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there is no next or previous

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its just 2 pointers

rich ridge Dec 30, 2019, 3:11 PM

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2 pointers to PS right

winged badger Dec 30, 2019, 3:11 PM

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yes, and they are not linked in any way

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find the APlayerState::CopyProperties

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and the function that calls it

rich ridge Dec 30, 2019, 3:12 PM

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If it's pointer to PS then it exhibits the properties of linked list

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Though it's not being used as linked list that is different mayyer

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Matter

winged badger Dec 30, 2019, 3:13 PM

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i'd c/p you the code at this time, but i am migrating to another PC so i am not fully set up

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it has nothing to do with linked list

rich ridge Dec 30, 2019, 3:13 PM

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I get it

winged badger Dec 30, 2019, 3:14 PM

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a function called from PC swaps the playerstates

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if has access to old PS as its still PC->PS at the time its called

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it creates a new PS

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then calls copy properties sending pointers to both PC->PS and NewlyCreatedPS

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as arguments

rich ridge Dec 30, 2019, 3:15 PM

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Ohh now I got it.

winged badger Dec 30, 2019, 3:15 PM

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and then it destroys the old one

rich ridge Dec 30, 2019, 3:15 PM

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I was thinking that PS pointer is present inside of PS

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You are correct it's not linked list at all

faint lintel Dec 30, 2019, 5:19 PM

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Hello,
Sorry to interrupt with another topic but I have a quick question about something.
I am having trouble getting a player PlayerController.
I have made sure that my playercontroller is assigned in my GameMode and the world is using my GameMode.
I also tested with putting a breakpoint on a character movement, to look with debugging if the playercontroller is assigned and it is.
Also I am controlling my character through PlayerController so it wouldnt even move if it was an incorrect one or not assigned.

Scenario I have trouble with is the following:
I have another object which has overlap methods in and I am trying to get OtherActor's(my game character) playercontroller, but it is returned as NULL.
Now what is strange is that if I test the same thing with 1 player, so a single player game, then it works I get the correct playercontroller.
When I do it with more than 1 player it tells me the playercontroller is NULL although I know it is not.

Does anyone happen to know what might cause this?

My C++ code for getting the PlayerController inside onOverlapBegin:

AC_Barni* PlayerCharacter = Cast<AC_Barni>(OtherActor); <---- my game character.
if (PlayerCharacter)
{
AGamePlayerController* GamePlayerController = Cast<AGamePlayerController>(PlayerCharacter->Controller);
.....
}

I have also tried this, but it returns null
AGamePlayerController* GamePlayerController = Cast<AGamePlayerController>(PlayerCharacter->GetController();

winged badger Dec 30, 2019, 5:46 PM

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it is null

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PC only exists on owning client and server

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you don't have PCs for other players on clients

raven viper Dec 30, 2019, 5:55 PM

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eXi's compendium neatly outlines what classes exist, how, and where.

faint lintel Dec 30, 2019, 6:01 PM

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But then I am testing with 2 players where one is host and other is client, they both have their own PCs, so when I run into a triggerbox, I should be able to get that PC or am I missing something

winged badger Dec 30, 2019, 6:02 PM

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overlaps run on all machines

faint lintel Dec 30, 2019, 6:02 PM

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ah damng

winged badger Dec 30, 2019, 6:02 PM

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that includes both clients

faint lintel Dec 30, 2019, 6:02 PM

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I tottaly forgot that

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thank you!

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but still.. if it runs on all clients I should still be able to get it

winged badger Dec 30, 2019, 6:03 PM

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when client 1 overlaps on client 2's machine, no

faint lintel Dec 30, 2019, 6:03 PM

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I mean if I set a break point into the overlap method, then each time i break it is with a specific character

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so first time i get it it is player 1 and second time it is player 2 or visa versa?

winged badger Dec 30, 2019, 6:04 PM

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you should not be accessing PCs from any code that runs on every machine

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controller is not there to hold states that are replicated to everyone

faint lintel Dec 30, 2019, 6:06 PM

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okey, thank you

faint lintel Dec 30, 2019, 6:48 PM

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can someone please link me a reference or explain priefly why is overlap method called on all players not on the one that is actually overlapping a triggerbox.

winged badger Dec 30, 2019, 6:49 PM

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whatever actor has that OnOverlapBegin implemented

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exists on all machines

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whenever something triggers the overlap, code executes

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it doesn't care if its a player that has PC on that machine or not

plush lagoon Dec 30, 2019, 7:06 PM

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having some issues with replication of scaling of avatars across all clients on a server

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I have a game mode which is cycling through all of the player controllers, getting their character and then increasing the size of it depending on what they are doing

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for some reason, i cannot get it to replicate across all clients

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like they do not grow in scale

hoary lark Dec 30, 2019, 8:05 PM

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well, how are you doing it? assume game mode runs on server, sets a replicated "scale" variable on the pawn, clients adjust their scale on repnotify...

fleet bear Dec 30, 2019, 8:44 PM

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what should handle spawning players in multiplayer? I've always had the player controller do it automatically on load, but should the game mode be doing this or something?

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@plush lagoon lol hey bud

plush lagoon Dec 30, 2019, 9:21 PM

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@fleet bear gamemode should spawn them, and you should spawn the character or pawn and then possess it to the player controller

fleet bear Dec 30, 2019, 9:41 PM

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thanks

polar lotus Dec 30, 2019, 9:58 PM

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https://gyazo.com/e8c98e842e0d7c2be14e507f7f11f57c

Gyazo

▶ Play video

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Guys I have the same problem even when packaged

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My character jitters whenever he's not walking sideways. When I'm on a listen server and I am the authority then this does not happen but it does for all the other clients

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And it's even weirder when I package the game

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Sometimes the client can't see the jitter but other people can

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And sometimes vice versa

dapper hatch Dec 30, 2019, 10:49 PM

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@polar lotus I had the same issue a couple weeks ago... This fixed my issue. At least try it.

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If this doesn't work, then it might be that your movement is not replicated right.

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https://gyazo.com/8d2ec53ca0a8fe2428979b27dc5cb57a

Gyazo

hoary lark Dec 30, 2019, 10:51 PM

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(You can just set that setting in the movement component instead of using the BP if you so desired 😄 )

still path Dec 30, 2019, 11:44 PM

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Hello everyone. I am currently screwing around with networking (mostly working) but I am noticing that jumping (on client) will sometimes cause rubber-banding. When watching from the servers perspective I can see that the character will fail to jump from time to time yhus causing the rubber-banding. I do have the server RCP set to reliable and am not sure what is causing this / how to get around it. Any tips would be useful. Please note that I am working in BluePrints only as my experience with C++ is limited at best.

fossil spoke Dec 30, 2019, 11:53 PM

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@still path Are you using the normal Character that comes with UE4?