#multiplayer | Unreal Source | Page 416

manic pine Aug 25, 2018, 3:02 PM

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mmm well thats a mess

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you need to sort out whats gonna run on the server and whats gonna run on the clients

zinc zealot Aug 25, 2018, 3:03 PM

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you think thats it ?

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but that still doesnt explain why its printing 6 pc's is it ?

manic pine Aug 25, 2018, 3:04 PM

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very hard to say with those bps... poor variable and function names, no comments, etc.

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i already explained why its printing 6 pcs didnt i?

zinc zealot Aug 25, 2018, 3:04 PM

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im accessing a nullptr ?

manic pine Aug 25, 2018, 3:04 PM

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no, youre printing all PCs in the list every time someone joins

zinc zealot Aug 25, 2018, 3:05 PM

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ah...

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thanks

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the thing is its weird

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Blueprint Runtime Error: Accessed None trying to read property CallFunc_Array_Get_Item from function: 'ExecuteUbergraph_GameState1' from node: Murder in graph: EventGraph in object: GameState1 with description: Accessed None trying to read property CallFunc_Array_Get_Item

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it says this is the problem right

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but its just accessing the list and an index

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📎 unknown.png

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im gonna go search more

manic pine Aug 25, 2018, 3:07 PM

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do you know playersON has element 0 in it?

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the only place i see you setting it is in Tick2

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but that only succeeds if it finds GameMode

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which will only happen on server

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if your Redy event fires on clients, that would explain why its crashing

zinc zealot Aug 25, 2018, 3:13 PM

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what do you mean playersON has element 0 if its an array and it succeeds making the list it has the element 0

manic pine Aug 25, 2018, 3:15 PM

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where does gamestate get the list from?

zinc zealot Aug 25, 2018, 3:15 PM

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📎 unknown.png

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cast to thirdpersoncharacter

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thirdpersongamemode

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📎 unknown.png

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one thing

manic pine Aug 25, 2018, 3:16 PM

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that cast wont succeed on clients

zinc zealot Aug 25, 2018, 3:16 PM

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📎 unknown.png

manic pine Aug 25, 2018, 3:16 PM

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because there is no gamemode

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so where do clients get the list from

zinc zealot Aug 25, 2018, 3:17 PM

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gamestate

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thats why im making a variable

manic pine Aug 25, 2018, 3:17 PM

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where do the clients gamestate get the list from?

zinc zealot Aug 25, 2018, 3:17 PM

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📎 unknown.png

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dont the server and clients share it ?

manic pine Aug 25, 2018, 3:18 PM

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yes, gamestate exists on both client and server, but they only share what you explicitly tell them to share

zinc zealot Aug 25, 2018, 3:18 PM

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well im replicating the variable... doesnt that do the job ?

manic pine Aug 25, 2018, 3:18 PM

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if youre replicating it then yes, that should do the job, but its not foolproof

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for instance, its possible you are trying to access the list before it has been replicated

zinc zealot Aug 25, 2018, 3:19 PM

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hmmm

manic pine Aug 25, 2018, 3:19 PM

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keep in mind, replicating takes time

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it has to send it over the network

zinc zealot Aug 25, 2018, 3:19 PM

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but the redy

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📎 unknown.png

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like takes what 20 secs

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for every player to ready up

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do you rly think thats the problem ?

manic pine Aug 25, 2018, 3:20 PM

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ah, youve more problems there

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youre trying to replicate a list of playercontrollers

zinc zealot Aug 25, 2018, 3:21 PM

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is that wrong ?

manic pine Aug 25, 2018, 3:21 PM

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do you know how they work?

zinc zealot Aug 25, 2018, 3:21 PM

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each player has one

manic pine Aug 25, 2018, 3:21 PM

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the server creates all the playercontrollers, so it has access to each one

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then, every player has access to his own playercontroller

zinc zealot Aug 25, 2018, 3:21 PM

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but if also tested with out replicating it

manic pine Aug 25, 2018, 3:21 PM

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but doesnt know about any other players' controllers

zinc zealot Aug 25, 2018, 3:22 PM

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hmm

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but im communicating from the server to the players i think

manic pine Aug 25, 2018, 3:23 PM

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yes, youre replicating an array with references to player controllers, but the controllers themselves arent replicated

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so on the client they become 'null'

zinc zealot Aug 25, 2018, 3:23 PM

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ok im not replicating anymore and ive set redy to run on server

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now

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it always gets the same controller xd

manic pine Aug 25, 2018, 3:24 PM

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because youre saying getcontroller#0

zinc zealot Aug 25, 2018, 3:25 PM

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wait a sec...

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ok im pretty sure its working

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📎 unknown.png

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changing the index

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gets different player controllers

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so im pretty sure its good now 😄

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gonna test

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nice!!!

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thx man 😄

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im so dumb

manic pine Aug 25, 2018, 3:28 PM

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great!

zinc zealot Aug 25, 2018, 3:28 PM

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since redy wasnt replicated

manic pine Aug 25, 2018, 3:28 PM

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keep trying, gets easier when you start to understand it

zinc zealot Aug 25, 2018, 3:28 PM

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it wasnt getting the player controllers since they only All exist on server

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thx

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😃

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im making this to play with my friends :p

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murder mystery know about it ?

manic pine Aug 25, 2018, 3:29 PM

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ive heard about it, not played it

zinc zealot Aug 25, 2018, 3:42 PM

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question

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📎 unknown.png

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what does this mean ?xD

ember needle Aug 25, 2018, 3:55 PM

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Is it normal that I cannot multicast from a game state?

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I read from Cedric's compendium that the Game State is replicated

zinc zealot Aug 25, 2018, 3:56 PM

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what are you trying to do ?

ember needle Aug 25, 2018, 3:56 PM

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I have a list of players set in slots.

zinc zealot Aug 25, 2018, 3:56 PM

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im not too experienced

ember needle Aug 25, 2018, 3:56 PM

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I want to periodically multicast those

zinc zealot Aug 25, 2018, 3:56 PM

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but ye

ember needle Aug 25, 2018, 3:56 PM

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...ye what

zinc zealot Aug 25, 2018, 3:56 PM

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im gonna try to help

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send a screenshot of the BP

ember needle Aug 25, 2018, 3:57 PM

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simple question: can you yes or no multicast from Game State.

zinc zealot Aug 25, 2018, 3:57 PM

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in my gamestate

ember needle Aug 25, 2018, 3:57 PM

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multicasts work from Player States, Player Controllers, Pawn etc but NOT from Game State

zinc zealot Aug 25, 2018, 3:57 PM

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in a custom event

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i can set it to multicast

ember needle Aug 25, 2018, 3:57 PM

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ok, do you receive it on all clients.

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because I do not.

zinc zealot Aug 25, 2018, 3:58 PM

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dunno

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how do i test it

ember needle Aug 25, 2018, 3:58 PM

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well then...?!?

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😃

zinc zealot Aug 25, 2018, 3:58 PM

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welp

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youre getting something from the server and running it on all clients ?

ember needle Aug 25, 2018, 3:59 PM

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simple multicast. just PRINT HELLO on multicast

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so "RUN ON SERVER" -> "MULTICAST" -> print HELLO

zinc zealot Aug 25, 2018, 4:00 PM

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📎 unknown.png

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📎 unknown.png

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something like this ?

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it printed that in all clients

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and server

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since mine is a listen server

ember needle Aug 25, 2018, 4:02 PM

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@zinc zealot thanks but this is not helping 😃

zinc zealot Aug 25, 2018, 4:02 PM

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sry :7

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i dont know then

manic pine Aug 25, 2018, 4:02 PM

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you'd need a switch on authority to actually test it

ember needle Aug 25, 2018, 4:02 PM

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thank you anyway 😃

manic pine Aug 25, 2018, 4:02 PM

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but yes, multicast on gamestate is fine

ember needle Aug 25, 2018, 4:02 PM

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well raap

manic pine Aug 25, 2018, 4:02 PM

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likely reason if its not working is youre doing it before its replicated to clients

ember needle Aug 25, 2018, 4:03 PM

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if i call it from a listening server it workd

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if i call it from a client then the run on server -> multicast does not work

manic pine Aug 25, 2018, 4:03 PM

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yeah, theres your problem, the client->server call

ember needle Aug 25, 2018, 4:03 PM

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likely reason if its not working is youre doing it before its replicated to clients
no, this is a custom click event on clients

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what is my problem?

manic pine Aug 25, 2018, 4:03 PM

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you cant call server functions on an object you(the player/client) dont own

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do it through your pawn/playerstate/controller instead

ember needle Aug 25, 2018, 4:04 PM

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what

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no

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hold on

zinc zealot Aug 25, 2018, 4:04 PM

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he needs the switch authority right

ember needle Aug 25, 2018, 4:05 PM

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no no no

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https://gyazo.com/79725d46d07fda9c61cd3584d733c7e1

Gyazo

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this is on the Game State

zinc zealot Aug 25, 2018, 4:05 PM

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📎 unknown.png

manic pine Aug 25, 2018, 4:05 PM

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right, your SendServer will never be sent to server

zinc zealot Aug 25, 2018, 4:05 PM

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if its run on client

manic pine Aug 25, 2018, 4:05 PM

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because you dont own gamestate

ember needle Aug 25, 2018, 4:05 PM

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ah there you go.

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why not

manic pine Aug 25, 2018, 4:05 PM

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gamestate is server's, not yours

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you only own your controller, your playerstate and your pawn, if any

ember needle Aug 25, 2018, 4:06 PM

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ok so for multicast to work you need to own it, like playuer state, controller, pawn?

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(on top of being replicated)

manic pine Aug 25, 2018, 4:06 PM

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no, for Server RPC to work

ember needle Aug 25, 2018, 4:06 PM

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yeah sure that's what I'm talking about

manic pine Aug 25, 2018, 4:06 PM

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then yes

ember needle Aug 25, 2018, 4:06 PM

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so how would you go in sending periodically from a server to all clients

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from a DEDICATED server

manic pine Aug 25, 2018, 4:07 PM

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hmm you may have misunderstood, or im poor at explaining, or i misunderstood the problem...

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the way i understood it, your client is sending a server rpc which in turn does a multicast

ember needle Aug 25, 2018, 4:07 PM

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yes

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that does not work on game state

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got it

manic pine Aug 25, 2018, 4:07 PM

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right, im saying youre not allowed to do a server rpc on gamestate

ember needle Aug 25, 2018, 4:08 PM

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ok no worries i've seen the issue

manic pine Aug 25, 2018, 4:08 PM

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(the multicast works fine on gamestate, if sent from the server)

ember needle Aug 25, 2018, 4:08 PM

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i need to refactor some stuff into controlled elements

manic pine Aug 25, 2018, 4:08 PM

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so you can do your request through for instance your controller

ember needle Aug 25, 2018, 4:08 PM

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yes

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thank you

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(and dudawar) 😃

manic pine Aug 25, 2018, 4:08 PM

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👍

ember needle Aug 25, 2018, 4:13 PM

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one question more: is possible to send a RPC to a client only from a server?

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client ask servers, get reponse

manic pine Aug 25, 2018, 4:29 PM

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yeah, server can send client RPC on an object that client owns

zinc zealot Aug 25, 2018, 4:30 PM

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guys

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📎 unknown.png

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📎 unknown.png

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for some crazy reason

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different integers same player O.o ?

manic pine Aug 25, 2018, 4:31 PM

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how do you know its the same player

zinc zealot Aug 25, 2018, 4:32 PM

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📎 unknown.png

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they are different objects

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📎 unknown.png

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or maybe im doing something rly stupid

manic pine Aug 25, 2018, 4:34 PM

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how many times are you calling Redy

zinc zealot Aug 25, 2018, 4:34 PM

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3

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oh no

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i mean 1

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1

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📎 unknown.png

manic pine Aug 25, 2018, 4:34 PM

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are you sure the answer isnt 3?

zinc zealot Aug 25, 2018, 4:34 PM

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yep

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see for youre self

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your*

manic pine Aug 25, 2018, 4:35 PM

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the answer is actually 3

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can you guess why?

zinc zealot Aug 25, 2018, 4:35 PM

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..

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yep

manic pine Aug 25, 2018, 4:35 PM

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^___^

zinc zealot Aug 25, 2018, 4:35 PM

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the way its replicating right

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ffff xD

manic pine Aug 25, 2018, 4:35 PM

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youre calling it on each client

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so each client asks the server to run the Redy function

zinc zealot Aug 25, 2018, 4:36 PM

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but

manic pine Aug 25, 2018, 4:36 PM

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or wait

zinc zealot Aug 25, 2018, 4:36 PM

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no

manic pine Aug 25, 2018, 4:36 PM

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oh, no its in gamestate

zinc zealot Aug 25, 2018, 4:36 PM

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its the gamestate im on

manic pine Aug 25, 2018, 4:36 PM

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my mistake

zinc zealot Aug 25, 2018, 4:36 PM

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xD

manic pine Aug 25, 2018, 4:37 PM

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alright, so its called just once

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its spawning 2 characters

zinc zealot Aug 25, 2018, 4:37 PM

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ye

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but it should spawn on different players

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Since

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the index is different and its the same list

manic pine Aug 25, 2018, 4:38 PM

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im not sure what that means, the "but it should spawn on different players" part

zinc zealot Aug 25, 2018, 4:38 PM

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ok

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so

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in the player controller BP

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i did a custom event

manic pine Aug 25, 2018, 4:38 PM

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right, murder and detective

zinc zealot Aug 25, 2018, 4:39 PM

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wich spawns an actor at the player location (supposedly im pretty sure thats the mistake)

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But

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what defines at wich player it spawns

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The Get

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📎 unknown.png

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its using a player controller from the list

manic pine Aug 25, 2018, 4:39 PM

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do you understand what Spawn does?

zinc zealot Aug 25, 2018, 4:39 PM

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it sends to that player controller

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spawns an actor

manic pine Aug 25, 2018, 4:39 PM

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right... thats all it does

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nothing more

zinc zealot Aug 25, 2018, 4:40 PM

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ye

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exactly

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📎 unknown.png

manic pine Aug 25, 2018, 4:40 PM

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so all you should expect is that a character appears in the world

zinc zealot Aug 25, 2018, 4:40 PM

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yee

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but i set the transform the actor location you see

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but maybe its not getting the owning actor

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so it just spawns in like 0 0 0

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thats what im thinking

manic pine Aug 25, 2018, 4:41 PM

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it would, because youre in the character controller

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character controller doesnt have a location

zinc zealot Aug 25, 2018, 4:41 PM

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but can i get the actor its currently controlling ?

manic pine Aug 25, 2018, 4:41 PM

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yes, if it has one

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its called Pawn

zinc zealot Aug 25, 2018, 4:42 PM

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xD

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ye im stupid

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gonna test it

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for some reason when i did this

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like 4 days ago

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i dint find this

manic pine Aug 25, 2018, 4:42 PM

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in that case, youll be spawning a new character on top of the old pawn

zinc zealot Aug 25, 2018, 4:42 PM

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get controlled pawn

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ye

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😃

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its working

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thankz u 😄

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omg im so dumb

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ahahahaah

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thx alot @manic pine

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if you need help PM me and i can try

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the least i can do 😃

manic pine Aug 25, 2018, 4:44 PM

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great, good luck!

worthy wasp Aug 25, 2018, 4:48 PM

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Does anyone have experience with ASpectatorPawn - specifically with why the rotations arent being applied when you SwitchToNextPlayer() ?

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The spectatorpawn rotation stays at 0.0.0

ember needle Aug 25, 2018, 4:53 PM

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probably because the controller knows the rotation and the clients that switch there doesn't?

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raap knows it better 😃

worthy wasp Aug 25, 2018, 4:56 PM

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if i look at this theoretically - the clients are attaching to the ASpectatorPawn.... the SwitchToNextPlayer() isnt described very well at all in the API and theres no docs.... how is it the pawn is glued to the SPECTATED? Via controller? If thats the case - then there would obviously be no rotations.....

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as the controller never rotates - only the pawn its controlling

manic pine Aug 25, 2018, 4:59 PM

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switchtonextplayer is afaik meant for the SetViewTarget stuff

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i.e. spectate next player

worthy wasp Aug 25, 2018, 4:59 PM

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i'll try to debug string what the pawn is attached to (ASpectatorPawn)...... GetOwner probably returns controller i assume.... i'll try to debug out the GetOUter & GetAttachParent() to see where its connected at

manic pine Aug 25, 2018, 4:59 PM

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unrelated to spectator pawn, which is for flying around in the world with

worthy wasp Aug 25, 2018, 4:59 PM

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yes sorry raap....

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uh

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one sec.

manic pine Aug 25, 2018, 5:00 PM

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afaik you dont need a spectator pawn to view other players

worthy wasp Aug 25, 2018, 5:00 PM

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ServerViewNextPlayer()

manic pine Aug 25, 2018, 5:00 PM

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yeah, that'll just switch your view target

worthy wasp Aug 25, 2018, 5:00 PM

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Move camera to next player on round ended or spectating

manic pine Aug 25, 2018, 5:01 PM

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your view target need not be the same as your possessed pawn

worthy wasp Aug 25, 2018, 5:01 PM

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well thats opbvious - but that function does that automatically

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so firstly - to do this you have to BE IN SPECTATING

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ChangeState(NAME_Spectating)

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then simply - its running ViewPlayer(+1)

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which is SetViewTarget(Playerstate)

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but why then arent rotations applied? Any other actor you do SetViewTarget on.... will inherit its rotations

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its not even inherit at that point....

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you're LOOKING THROUGH ITS CAMERA

manic pine Aug 25, 2018, 5:08 PM

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youre trying to look through the camera of another character ye

worthy wasp Aug 25, 2018, 5:09 PM

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i'm not doing anything other than ServerViewNextPlayer()

manic pine Aug 25, 2018, 5:09 PM

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right, same thing

worthy wasp Aug 25, 2018, 5:09 PM

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yes i agree 😃

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i'm trying to understand where the disconnect is happening?

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so i can fix it

manic pine Aug 25, 2018, 5:09 PM

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well, its a problem with the way theyve done rotation and stuff

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ie clients are not normally informed about the Pitch of another client's camera

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however, ServerViewNextPlayer(more specifically, ServerSetViewTarget) will replicate those to you

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but for some reason, camera manager on your local client will use the wrong way to get them

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try this on your Character blueprint class equivalent

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switch NOT locally controlled - firstpersoncamera->setworldrotation(getactoreyesveiwpoint)

worthy wasp Aug 25, 2018, 5:12 PM

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ok by switch you mean IF/BRANCH ?

manic pine Aug 25, 2018, 5:12 PM

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ah yes

worthy wasp Aug 25, 2018, 5:12 PM

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❤

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i'm in middle of a deep compile - i'll try this here when done

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i would assume this needs to go on TICK?

manic pine Aug 25, 2018, 5:13 PM

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sadly yes... there might be some stuff in CameraManager you can override

worthy wasp Aug 25, 2018, 5:13 PM

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i'll peek into camera manager too

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i know were using default engine class - nothign custom overriden

manic pine Aug 25, 2018, 5:13 PM

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the GetActorEyesViewPoint is the key function, because it checks if player is locally controlled and if not, tries to use replicated camera values

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i think its a bug that camera manager doesnt get its rotation from GetActorEyesViewPoint by default

worthy wasp Aug 25, 2018, 5:15 PM

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❤

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thanks bud! hopefully this solves it and i can send you some bier

manic pine Aug 25, 2018, 5:15 PM

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lets hope

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the entire spectator framework is a mess, so anything is possible

worthy wasp Aug 25, 2018, 5:16 PM

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so weird this spectator pawn

manic pine Aug 25, 2018, 5:16 PM

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spectator pawn should be unnecessary for this stuff though

worthy wasp Aug 25, 2018, 5:17 PM

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i ASSUMED ServerSwitchToNextPlayer() simply attached to the spectator pawn

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but i didnt look until just now what it was doing in code

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only through the web page API

manic pine Aug 25, 2018, 5:17 PM

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yeah, it just does the set view target stuff, which replicates to client and then goes Cameramanager->setviewtarget

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spectator pawn is exclusively for actually flying around freely with, afaik

worthy wasp Aug 25, 2018, 5:18 PM

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how NOT intuitive....

manic pine Aug 25, 2018, 5:18 PM

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yep

worthy wasp Aug 25, 2018, 5:18 PM

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i wonder who does these framework designs @ epic lol

manic pine Aug 25, 2018, 5:19 PM

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randomly generated i think

worthy wasp Aug 25, 2018, 5:19 PM

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lol

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agreed

jolly siren Aug 25, 2018, 6:30 PM

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Has anyone had issues with steam and seamless ServerTravel in 4.19? Sometimes my clients get stuck and don't reconnect to the server. The client logs get spammed with
LogWorld: Warning: SetActiveLevelCollection attempted to use an out of date NetDriver: GameNetDriver

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Hm so when it works correctly the client browses to the transition map
LogNet: Browse: /Game/Maps/MainMenu

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And when it breaks the client tries to skip the transition map for some reason
LogNet: Browse: steam.90116905833024518:7789//Game/Maps/Foo?game=HardcoreFFA

elfin shard Aug 25, 2018, 6:39 PM

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📎 unknown-7.png 📎 unknown-6.png

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Can someone help me? Im trying to spawn an actor (building system), it works on the Server (it's replicated on the client) but the client is not able to replicate the actor on the server. Any good idea?

rotund wedge Aug 25, 2018, 6:48 PM

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omg

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that looks like my code XD

elfin shard Aug 25, 2018, 6:49 PM

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What If is it your code? 😏

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plot twist

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So, any good advice?

rotund wedge Aug 25, 2018, 6:53 PM

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only one XD

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try harder

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but it isnt mine code XD

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bc i fixed mine :3

winged badger Aug 25, 2018, 7:01 PM

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@elfin shard when you call that the BuildActor event executes on server

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it reads the variables: Object, IsBuilding, BuildLocation and ObjectRotation from server

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and you should not Multicast that, if the Actor is replicated then all the clients will have a pair of them

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one they spawned, and one that server replicated

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also, please read this:

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

Cedric Neukirchen

eXi

Multiplayer Network Compendium

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@jolly siren i have seen that warning prior, in 4.15 and 4.18

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for me it was just a couple of lines of spam, then it connected properly

jolly siren Aug 25, 2018, 7:46 PM

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Okay, yeah I thought maybe it wasn't the root cause. It only looks to happen when it doesn't connect tho. It's almost like sometimes the clients want to use non-seamless travel

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I guess it's probably caused by this https://github.com/EpicGames/UnrealEngine/blob/f509bb2d6c62806882d9a10476f3654cf1ee0634/Engine/Source/Runtime/Engine/Private/GameModeBase.cpp#L442

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Because my servers are up for long amounts of time

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bool bSeamless = (bUseSeamlessTravel && GetWorld()->TimeSeconds < 172800.0f); // 172800 seconds == 48 hours```

winged badger Aug 25, 2018, 7:53 PM

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i got it on a listen server

jolly siren Aug 25, 2018, 7:54 PM

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Right, I'm working with dedicated servers. I think the warning is just a side effect tho

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As that bool states, it is going to try and use non-seamless travel if the server is up for more than 48 hours

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even if you want seamless

winged badger Aug 25, 2018, 7:56 PM

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from what i've seen about dedicated servers, best to have "daily maintenance"

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a quick reboot

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a week in they come to a point when connection is not possible, because of error in the floating point in accumulated DeltaTime

jolly siren Aug 25, 2018, 7:57 PM

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Agreed, yeah I've ran into those issues as well

runic cairn Aug 25, 2018, 8:13 PM

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Hey guys, I just updated my engine from 4.17.2 -> 4.20.2 and my output log for our project is now littered with PostReceivedBunch: Object == NULL messages. Is this a good/bad/normal thing?

winged badger Aug 25, 2018, 8:14 PM

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bad, especially if its in red

runic cairn Aug 25, 2018, 8:14 PM

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it's white

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How would you go about determining where this is happening?

winged badger Aug 25, 2018, 8:16 PM

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go to code for NetDriver classes, search for the log string

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see what condition outputs it

zinc zealot Aug 25, 2018, 8:19 PM

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📎 unknown.png

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📎 unknown.png

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how is it possible

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that one character sometimes is both detective and murder?

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📎 unknown.png

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📎 unknown.png

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integers go 0 to 2 right ?

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wait

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if i set an integer max 2

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and connect to random integer

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he will have 0 1 and 2 ?

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damn

pallid mesa Aug 26, 2018, 12:25 AM

#

@jolly siren I am having exactly the same issue rn. However It appeared when I tried to manually "open" to a recently created dc server.

#

The server doesn't even appear for me when I refresh the list, the query port fails straight away even tho everything seems configured correctly

#

(ports open, firewall exceptions on point and so on...)

#

nmap succeds btw.

rose egret Aug 26, 2018, 5:50 AM

#

how do I execute dedicated servers by my master server?

umbral adder Aug 26, 2018, 9:40 AM

#

@thin stratus i am trying to make a store system in ue4

#

i made the php stuff and login in ue4

#

📎 unknown.png

#

i made it display but how do i check if i bought it or not?

meager spade Aug 26, 2018, 4:08 PM

#

get a response from the website or query the website asking if the item is indeed owned by the player and then enable it>

#

?

wintry ruin Aug 26, 2018, 4:10 PM

#

Hi, I'm trying to set a different material on the sword of the player character with code like this:
UMaterial* MaterialAsset2 = Cast<UMaterial>(StaticLoadObject(UMaterial::StaticClass(), NULL, TEXT("Material'/Game/Weapons/staff_wands/staff03a_Mat.staff03a_Mat'")));
MyMeshComponent->SetMaterial(0, MaterialAsset2);
but it's not showing up, I still see the old material set
I do the switch of material server side, is there any problem with that? Isn't that replicated automatically to the clients?

#

I have a loop at game start server side which reads all NPCs and their items from the database
and uses SpawnActor to prepare the world
in that piece of code I also swap materials as needed (example golden sword vs steel sword)
with SetMaterial
client side everything looks fine, except the SetMaterial call

zinc zealot Aug 26, 2018, 4:54 PM

#

@lilac gazelle doing what you said

#

did this

#

working gud

#

📎 unknown.png

#

but for some reason only happens on 2 ppl

#

when i set current players to 2

#

when i set current players to 3

#

📎 unknown.png

#

works for 3 ppl but one error

#

📎 unknown.png

#

i know the problem now

#

anyone knows a way to get 2 random different numbers

bleak lily Aug 26, 2018, 5:10 PM

#

so my characters animation blueprint is weird

#

it registers the idle animation

#

but it wont replicate the walking one

#

I made an rpc and stuff like that

#

the mesh itself replicates

#

and all the variables with it do too

#

https://gyazo.com/9fc4f9f9fa7a298b338b9e0ead3979f3

Gyazo

#

https://gyazo.com/1de1b5469aed5b834b650ff7242f9158

Gyazo

jolly siren Aug 26, 2018, 5:46 PM

#

Everything about that is hurting my eyes 👀

#

Why are you doing a RPC on tick?

bleak lily Aug 26, 2018, 5:53 PM

#

idk

#

I thought I had to

#

I just made an rpc after since i didnt do most of the stuff I am doing with replication in mind

jolly siren Aug 26, 2018, 6:05 PM

#

Yeah it's much better to design with multiplayer in mind

#

Something like this should help you https://www.youtube.com/watch?v=z7DI17JAGQM

YouTube

PyroDev

Unreal Engine 4 - Animation replication

Hey guys, this time we will: - replicate animations to clients and server ___________________________ As always leave a comment if anything is unclear ______...

▶ Play video

bleak lily Aug 26, 2018, 6:11 PM

#

alright

#

thank you

jolly siren Aug 26, 2018, 6:11 PM

#

np, good luck 😃

ember needle Aug 26, 2018, 6:12 PM

#

I have a replicated actor (helicopter), with a replicated variable on it which is an actor that mainly contain the helicopter path (spline). The spline itself is replicated. If I change the spline to a newly spawned actor on the server, then the clients do NOT see it (it's none). Why is that?

gleaming bobcat Aug 26, 2018, 7:18 PM

#

Is TMap arelady replicable ?

grand kestrel Aug 26, 2018, 7:47 PM

#

@gleaming bobcat it is not and likely will never be

#

And perhaps should never be

gleaming bobcat Aug 26, 2018, 7:47 PM

#

sad face then

twin juniper Aug 26, 2018, 9:15 PM

#

Hey guys in terms of network profiling for making the game have less latency- i tried using this tool here https://docs.unrealengine.com/en-us/Engine/Performance/Profiler and was able to find the "net" group of information in each frame (connected from standalone and typed in "stat startfile" in the console and to stop "stat stopfile". seemed to create the profile that i could launch in the session front end, and that opens properly. When I look at the "net group" as in the image, i don't really think i fully understand what is going on here in terms of where the latency is and what is happening exactly, i know i can search for "net" in the search for filter events textbox in the bottom right, but is this the proper way to do it? I'm basically just trying to get my game network optimized for multiplayer, and trying to find areas in RPC code and any replicated variables and/or actors that should be set differently or in another way to make the game still play great but have as little packet loss as possible over the network. In addition to the above, if it's possible to add a stat to a blueprint node such that it can later display in the profiler, does anyone know the process for this?

📎 unknown.png

zinc zealot Aug 26, 2018, 10:28 PM

#

hey devs

#

does having to many event ticks lag lots ?

#

like make the game considerably slower

#

📎 unknown.png

twin juniper Aug 27, 2018, 1:32 AM

#

@zinc zealot i rarely use tick, usually timelines / timers. you can profile it in game by opening the console with '~' and typing stat game to see world tick time, and tick time

crimson notch Aug 27, 2018, 2:10 AM

#

does anybody know why my character lags backwards? i dont have much/any code for replication, just the checkboxes

📎 2018-08-27_03-05-43.mov

#

dont mind the graphics not replicating, i pritty much removed all replication code to try debug

crimson notch Aug 27, 2018, 2:36 AM

#

does multiplayer always have lag for sprites?

wild aurora Aug 27, 2018, 2:55 AM

#

Do you guys know if replication changes drastically if you use a custom player controller for a character? I have a projected originally started from a 3rd person C++ template, and it crashes immediately with two players or if set to dedicated server mode

#

Trying to figure out what it could be

#

Wondering if there's something on a controller I've messed up

#

I wasn't really replicating anything specifically, I tried replicating health to see if that chanted anything, but I still get crashes

scenic tangle Aug 27, 2018, 5:00 AM

#

have you checked the stack trace when it crashes?

bleak lily Aug 27, 2018, 1:43 PM

#

oh so I followed the one tutorial by pyrodev and I can see the character do the running animation but when you see it in the first person view he doesnt do the animation\

#

the animation replication

#

It shows it for the 1st person playing but when someone else joins they cant see their own person running in firstperson

#

but everyone else can see it

bleak lily Aug 27, 2018, 4:51 PM

#

well another issue is when I make my character mesh replicate it gets really choppy and somewhat delayed for the clients

bleak lily Aug 27, 2018, 7:02 PM

#

https://gyazo.com/6b4b8a6a0c8d0ccd923179ef1db7b6dc

Gyazo

#

any idea how I could replicate this

#

it shows for the characters in the actor thing but when they see each other they dont run

twin juniper Aug 27, 2018, 7:03 PM

#

Have any of you had this issue with dedicated servers?

#

"Notify Accepted Connection: IP_ADDR"

#

It just spams it but never connects

twin juniper Aug 27, 2018, 9:42 PM

#

anyone know how to make a networked custom event like an RPC show up in the session frontend profiler tool in UE ?

gusty spire Aug 27, 2018, 9:51 PM

#

why is seamless travel so bad?

#

its like many of my events aren't executed on the player controller

#

and its like the server recognizes the player controller exist but when i cast to it it fails meaning it doesn't exist

#

its soo bad and i don't understand whyy

winged badger Aug 27, 2018, 10:02 PM

#

check if the map you're travelling to has the correct GameMode set

gusty spire Aug 27, 2018, 10:11 PM

#

yes it does

celest sigil Aug 27, 2018, 11:28 PM

#

Hey guys, I'm having a brain fart. I've made a shield system, and the shield will have different attributes depending on what spell you have enabled.

For instance, I'm having problems right now with one of the spells.

While Fire is Enabled, if the enemy player (client) shoots a Fireball at the Server that has a fireshield turned on, I want the Server to receive 10 magic power by absorbing the attack. The problem is it's updating the Magic for both the server and the client.

#

📎 Magic_Absorb.jpg

#

Nevermind. Fixed it. I'm dumb and tired.

wild aurora Aug 28, 2018, 5:00 AM

#

I seem to be getting access code violations with my game (it's CPP project) when I make a game go from 1 player to 2 player

#

I use player controllers to handle input and everything instead of directly on the pawn

#

https://gist.github.com/jedh/26544d4833049600314816a8f73bb4f1

Gist

ue4 crash log

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

green cedar Aug 28, 2018, 6:48 AM

#

Can child actors not call replicated events?

cursive shard Aug 28, 2018, 8:47 AM

#

Hi everybody, can I ask what rewind hit detection is and why we need it?

#

From my searches it's related to handling network delay but I am not sure how it works. Can someone please explain it to me? Thanks in advance.

green cedar Aug 28, 2018, 8:50 AM

#

basically the server state (authoritative) and the client state are never in sync

thin stratus Aug 28, 2018, 8:50 AM

#

@green cedar Player needs to own them

#

And they need to be replicated

green cedar Aug 28, 2018, 8:50 AM

#

ya I gathered and rewrote it. Kinda dumb, but 😛

#

Was hoping I could just stick the child actors on and let them do whatever they wanted with message inputs

wise depot Aug 28, 2018, 8:50 AM

#

hey guys, just wondering if anyone may know anything on this issue?

https://answers.unrealengine.com/questions/821332/client-and-dedicated-server-on-different-subsystem.html

Having multiple online subsystems active in ue4?

thin stratus Aug 28, 2018, 8:50 AM

#

@cursive shard It is not that straight forward, so I doubt people can explain this

#

@wise depot For one instance of the game you only can have one subsystem

#

Your server could have a different one I assume but not sure

green cedar Aug 28, 2018, 8:52 AM

#

@cursive shard I won't be able to do a great job explaining....steam has docs somewhere describing it. but basically it's the client saying what it saw, the server determining if that was possible, then correcting it's own (future from the perspective of the client) state

thin stratus Aug 28, 2018, 8:52 AM

#

The idea is that the client sees what's already happened

#

Rather than guessing what will happen

#

So the client always sees the past

#

When the client shoots an enemy, the server would already have a version where the enemy is one net update further

#

Which possibly means the client misses

#

So the server needs to recreate the past state in which the client is

green cedar Aug 28, 2018, 8:54 AM

#

http://denkirson.proboards.com/thread/5972/networking-lag-compensation-hit-detection

Networking, Lag Compensation, and Hit Detection | Hey, A Message Board

In not so recent developments, lag has taken the number one spot as a scapegoat for a lot of players' deaths. So much so that people completely made up explanations as to how "lag comp screws you

thin stratus Aug 28, 2018, 8:54 AM

#

If you ever played counterstrike you would know what it means

#

Cause there you can be shot in the second you go behind a wall

green cedar Aug 28, 2018, 8:55 AM

#

there's a big post on it that (on cursory review) looks pretty legit

thin stratus Aug 28, 2018, 8:55 AM

#

Cause the person shooting you sees you in the past, in front of the wall

twin juniper Aug 28, 2018, 8:55 AM

#

Hey - eXi can I ask you a quick question if you don't mind? when you aren't busy.

thin stratus Aug 28, 2018, 8:55 AM

#

Just ask here instead of asking if you can ask

twin juniper Aug 28, 2018, 8:56 AM

#

all right

#

Trying to get a networked custom event like an RPC show up in the session frontend profiler tool in UE. do you know how i can do something like that?

thin stratus Aug 28, 2018, 8:56 AM

#

The session frontend is more for draw time right?

#

The rpcs show up in the netprofiler

#

Well the bandwidth part

#

The code your rpc executes will show in the session frontend as it counts as frame time

#

Or whatever the correct word is

twin juniper Aug 28, 2018, 8:58 AM

#

are you talking about the network profiler with this chart?

📎 250918-network-profiler.png

thin stratus Aug 28, 2018, 8:58 AM

#

Yeah that's where your rpcs show up

twin juniper Aug 28, 2018, 8:58 AM

#

i investigated it briefly. still studying it. i thought maybe the session frontend might have the net class stuff.

#

all right thanks. will try to record some stuff into there.

thin stratus Aug 28, 2018, 8:59 AM

#

Will Yuchen ever finish writing? :D

twin juniper Aug 28, 2018, 9:01 AM

#

I think I might have to enable this thing on my dedicated server binary itself. :X

thin stratus Aug 28, 2018, 9:01 AM

#

Well 4.20 should be better to check on dedi servers

twin juniper Aug 28, 2018, 9:01 AM

#

https://answers.unrealengine.com/questions/756629/how-do-i-network-profile-a-dedicated-server.html

thin stratus Aug 28, 2018, 9:01 AM

#

Cause epic put their cloud debugging stuff in there

twin juniper Aug 28, 2018, 9:02 AM

#

yeah i am on 4.20.2

#

works good, fast. good stuff really happy with it

#

just trying to do the due diligence of makign sure i have no bad rpc code

cursive shard Aug 28, 2018, 9:02 AM

#

Thank you very much guys. @thin stratus @green cedar
So the problem I am trying to solve is when the player does a melee attack, there could be a big delay between the attack and the knockback/damage of the ememy.
In the code it disables rewind for a server based hit detector which I guess it's WRONG? 😅
Becasue the character on the server side is further than the client so we should do the rewind on the server side character then it will be the same as the client side character...

thin stratus Aug 28, 2018, 9:03 AM

#

Yeah well the server needs to "rewind time" to check whatever the client say happened is actually true

green cedar Aug 28, 2018, 9:08 AM

#

if you aren't necessarily needing pinpoint accuracy, pick your battles with it

unique thunder Aug 28, 2018, 9:08 AM

#

when I spawn into my ded server (I think it usually happens with more players in it), I'm stuck in mid-air floating for like 5 seconds before I properly spawn into the PlayerStart and can play - why is that? How do I transition the player more smoothly into the map?

green cedar Aug 28, 2018, 9:09 AM

#

the network latency solutions are almost 20 years old and they still are convoluted messes to implement.

manic pine Aug 28, 2018, 9:10 AM

#

more than 20 i think, wasnt Quake the first to do it?

#

was ingenious

green cedar Aug 28, 2018, 9:11 AM

#

Was quake dedicated servers? I thought it was still trying to do shell terminals?

manic pine Aug 28, 2018, 9:11 AM

#

lockstep would be completely unacceptable these days

green cedar Aug 28, 2018, 9:11 AM

#

Or is that UT?

manic pine Aug 28, 2018, 9:12 AM

#

hmm i think quake had dedis

#

but thats not really relevant for the latency solution anyway

green cedar Aug 28, 2018, 9:13 AM

#

Yeah, you are right

manic pine Aug 28, 2018, 9:14 AM

#

unless we suddenly discover FTL communications, id expect we'll be stuck with it

bitter oriole Aug 28, 2018, 9:18 AM

#

We're not going to

#

Eventually, we'll all have sub-10ms latency with people in the same region, and networking will be more accurate than today when 100ms is still a common situation

#

Even in a small country, physics will constrain latency to at least a few ms, not to mention how prevalent wireless will be even a decade from now

manic pine Aug 28, 2018, 9:22 AM

#

yeah, at least for short distances hop overhead is the bigger issue

#

much thanks to ISPs that dont really care about ping times for gaming

#

routing the stuff all over the place

#

still, though 10-20 ms ping might be good enough that you wont bother with UI client prediction and such, it wont be good enough for shooting

bitter oriole Aug 28, 2018, 9:27 AM

#

Even prediction is always going to be a thing imho

#

My guess is that game engines will make it easier and easier by providing built-in replication models for common problems - weapons, characters, moving objects in the world, etc

#

At least it's more likely to have UE5 providing a UWeaponReplicationComponent, than it is to not need prediction 😃

manic pine Aug 28, 2018, 9:28 AM

#

yeah, automated paths for client prediction, with callbacks for when client predicted wrong, would certainly make it less work to do properly

chrome bay Aug 28, 2018, 10:11 AM

#

(working on a plugin to help solve that issue atm)

#

I think the biggest barrier atm for UE4, is that all it's good prediction stuff is encapsulated inside CMC. Once you start breaking it out into more generic types it makes life a lot easier.

#

UT has a few nice toys that can be broken out too

#

Also CMC's netcode is heavily coupled with it's simulation. Once they are split apart it's more useful too

winged badger Aug 28, 2018, 10:45 AM

#

there is the prediction system in GAS as well

#

there are about 300 lines of comments in GameplayPrediction.h in which they sum up what they are doing there

chrome bay Aug 28, 2018, 10:58 AM

#

I'm still curious as to why Epic don't use GAS for both UT and Fortnite weapons

#

I guess it's not performant enough for that amount of stuff going on

winged badger Aug 28, 2018, 10:58 AM

#

it doesn't seem entirely completed from the comments, either

jolly siren Aug 28, 2018, 11:28 AM

#

UT was in the works before GAS existed tho right?

#

I think GAS was created for Paragon

chrome bay Aug 28, 2018, 12:34 PM

#

I think GAS was usable by the time they started UT

#

But Fortnite uses GAS in some areas, but again not for weapons

#

At least not shooty-shooty pew pew weapons

jolly siren Aug 28, 2018, 12:36 PM

#

Ahh makes me wonder how fragmented their teams are

chrome bay Aug 28, 2018, 12:38 PM

#

Well UT team took over battle royale

#

I don't think GAS is necessarily performant enough for standard gun-like weapons, at least not in great volumes

#

Also UT was targeting 120Hz I believe, so they wanted really good hit detection

#

Responsiveness was probably the biggest barrier I guess

jolly siren Aug 28, 2018, 12:49 PM

#

Right, yeah that makes sense

dusty halo Aug 28, 2018, 1:03 PM

#

How do games with a lot of player make their lobby? Example Fortnite?

📎 458794510.png

#

YOu

#

You have joined server, with all other players, but how can you set up, that you can see only your self? And that when team players join, they are on side, but you always in the middle

chrome bay Aug 28, 2018, 1:07 PM

#

if player = me (PutInMiddle())

#

In all seriousness, there's no way for us to answer that

#

how you handle the lobby is entirely up to you

jolly siren Aug 28, 2018, 1:12 PM

#

https://forums.unrealengine.com/community/general-discussion/84523-few-questions-about-paragon-lobby-and-game?p=770471#post770471

Unreal Engine Forums

General discussion about the game industry and the Unreal Engine community.

dusty halo Aug 28, 2018, 1:22 PM

#

@jolly siren Good link, thank you. @chrome bay Nice answer. But That's why I ask for simple answers, no super detailed needed. That is my part and how I gonna handle yes. But question more is. How they manage to show you only your player. Do they set that only owner can see your character, or there is different solutions for that

chrome bay Aug 28, 2018, 1:22 PM

#

Judging by that lobby there is nobody else in it, it's just you

#

Other characters will show when other players join

dusty halo Aug 28, 2018, 1:23 PM

#

Server gives everyone their own lobby on the server?

bitter oriole Aug 28, 2018, 1:24 PM

#

It's up to you

dusty halo Aug 28, 2018, 1:24 PM

#

So basically it makes 1000nds of maps on same server?

bitter oriole Aug 28, 2018, 1:24 PM

#

You can have this be 100% client, or on the server

#

Or a mix of both

dusty halo Aug 28, 2018, 1:25 PM

#

But then it's not getting server info, like money, exp etc. Otherwise players can cheat

bitter oriole Aug 28, 2018, 1:25 PM

#

Why not ?

#

You can be on the server and still show something different

dusty halo Aug 28, 2018, 1:25 PM

#

Run local lobby even if I', on server?

bitter oriole Aug 28, 2018, 1:26 PM

#

This is just a menu with a 3D background, it can happen independently on all clients, whether you're connected to a server or not

#

Servers don't dictate everything

#

Clients in UE4 still run the full game, they're not just displaying stuff from a server.

dusty halo Aug 28, 2018, 1:27 PM

#

I more talk about charachter it self

bitter oriole Aug 28, 2018, 1:28 PM

#

The character is just a 3D mesh displayed behind a menu. You could have that while offline, online, in a loading menu, doesn't matter.

dusty halo Aug 28, 2018, 1:28 PM

#

I just try to find solution how to make these thing for my game - after player join server, he should create / customize his character. So I want it to see only his character. Pretty basic thing, but confused how to actually do it

bitter oriole Aug 28, 2018, 1:30 PM

#

Just spawn a local version of your character

#

On the client

#

@dusty halo If this is confusing, you should probably avoid multiplayer for now. You're going to have this kind of server-client decision literally all the time

#

Any object that is on the network will need different code while on server, on a client, etc

dusty halo Aug 28, 2018, 1:40 PM

#

I'm doing MP since first day I started to use UE4, haven't made anything Sp oriented. Confusing part is, that I have never done map travel etc. So now lobby is something new for me.

bitter oriole Aug 28, 2018, 1:43 PM

#

SP is an important first step

dusty halo Aug 28, 2018, 1:50 PM

#

I know, but I never can push my self to do something if I don't see a reason why. I started to use UE4, because I want to make MP game. Probably will stay as a dream, what at least I can play with my friends but still 😄 So I started with MP right a way. Couldn't just fallow tutorials to learn ue4 basic. What actually I should do for better understanding, but I can't push my self 😄

bitter oriole Aug 28, 2018, 1:53 PM

#

Just warning you here

lost inlet Aug 28, 2018, 2:06 PM

#

anyone ever run into weird reliability issues when sending a client->server RPC on a dormant actor?

#

for me it only sometimes sends

#

and it's annoying

winged badger Aug 28, 2018, 2:09 PM

#

dormant Actor, but owner by the client's PC?

#

thats... unusual

lost inlet Aug 28, 2018, 2:10 PM

#

we have dormant item actors, they don't need their replication updating when inactive so they're marked dormant

#

there's an interact RPC, this has reliability issues and i'm wondering if net dormancy is the culprit

#

i can work around it though

winged badger Aug 28, 2018, 2:10 PM

#

so the server RPC is not within the item itself?

lost inlet Aug 28, 2018, 2:11 PM

#

it's within the item itself (the item that's dormant) but the alternative is to put the interaction RPC on the pawn instead

winged badger Aug 28, 2018, 2:14 PM

#

might be a race condition, does it stop being dormant before the RPC lands or not

#

doing the log LogNet veryverbose in the console then sifting through all that spam might give a clue

lost inlet Aug 28, 2018, 2:15 PM

#

well the server sets the dormancy but the RPC is never hit, but i think i'm just going to move it to the pawn instead and see if it changes anything

manic pine Aug 28, 2018, 2:24 PM

#

you sure dormancy affects rpcs?

#

i didnt think that was the case

#

afaik it just stops actors from doing their netupdatetime check

winged badger Aug 28, 2018, 2:25 PM

#

i am not sure

#

i never used dormancy, and if i did it would be mostly for scenarios like: i have Actors placed in the level that are not relevant for the first stage of the game, i might even have a cutscene play out while they come out of dormancy

manic pine Aug 28, 2018, 2:27 PM

#

dormancy is kinda great actually, since with flush dormancy its essentially like manual-replication

lost inlet Aug 28, 2018, 2:27 PM

#

i can't see what else it'd be at this stage, i've moving my interaction RPC to the pawn which is always relevant and seeing if my luck changes

manic pine Aug 28, 2018, 2:28 PM

#

it only works intermittently?

#

if it never worked i'd have guessed you just didnt set the net owner on the items properly

lost inlet Aug 28, 2018, 2:28 PM

#

yeah which is the weird bit, the RPC is reliable too

manic pine Aug 28, 2018, 2:28 PM

#

but intermittent does sound weird

lost inlet Aug 28, 2018, 2:31 PM

#

it doesn't seem to be a net ownership issue either because it worked the first time but not the second, on the same actor

manic pine Aug 28, 2018, 2:31 PM

#

yeah, doesnt fit with intermittent

#

i know dormancy still allows server to do multicast on an object

#

but its possible it stops client->server RPCs?

#

hmm yeah, just did a quick test

#

server multicast or server->client go through on dormant actors

#

client->server does not

lost inlet Aug 28, 2018, 2:56 PM

#

yeah i ended up moving my interaction RPC to the pawn instead and it worked fine

#

mystery solved i guess

wise depot Aug 28, 2018, 3:38 PM

#

so prelogin is for authenticating a player, if i'm using an external service for handling stuff like that which requires async functions, what's the best way to handle this in prelogin?

do i need to butcher the engine somewhat to have it wait for my callback or is there something else already existing i can use?

Basically what the flow will be like that i'm aiming for is:

Server:
Prelogin(){
   authenticateUser(authToken);
}

authCallback(){
   success ? AllowLogin() : RejectLogin();
}

#

in a nutshell anyway

manic pine Aug 28, 2018, 3:47 PM

#

yeah, i think youd need to butcher the UWorld class

#

uworld is what calls prelogin when it receives a join request... if prelogin returns with no error message, it does WelcomePlayer

#

otherwise it kicks him out

#

you could handle the authentication in the game mode though... let player join but not play until authenticated

wise depot Aug 28, 2018, 4:06 PM

#

yeah i was thinking of doing that and just calling kickplayer if it rejects the authentication

manic pine Aug 28, 2018, 4:11 PM

#

its probably the simplest solution... messing around with that uworld stuff could get ugly fast

winged badger Aug 28, 2018, 4:15 PM

#

some services like steam will do it for you

wise depot Aug 28, 2018, 4:15 PM

#

yeah we're not using steam, its another service which will allow open crossplay

winged badger Aug 28, 2018, 4:15 PM

#

you can take a peek at their solution tho

manic pine Aug 28, 2018, 4:18 PM

#

yeah some sort of session thing might do the trick

twin juniper Aug 28, 2018, 5:58 PM

#

I have 4 questions :

is the console command "open <ip>" the only way of connecting via ip?
How can I check if an ip is available to connect without connecting to it?
How can I limit how many players are in the game when they connect by ip?
Does Lan find and create session work without steam?

twin juniper Aug 28, 2018, 6:36 PM

#

So afaik sessions need online subsystem and there's Lan and steam

ancient dew Aug 28, 2018, 6:36 PM

#

Sessions

#

1 - AFIK yes

#

2 - You need to find or create a matchmaking system to manage your sessions

twin juniper Aug 28, 2018, 6:37 PM

#

I know how to use sessions

ancient dew Aug 28, 2018, 6:37 PM

#

3 - There is an option called MaxPlayers when you create a session

#

4 - yes

twin juniper Aug 28, 2018, 6:37 PM

#

And do all of that with sessions

#

But only with steam I can make sessions actually work

ancient dew Aug 28, 2018, 6:38 PM

#

Probably u are having a lan issue

twin juniper Aug 28, 2018, 6:38 PM

#

But I need online

ancient dew Aug 28, 2018, 6:39 PM

#

ok, so you will need to use a third party service (and setup a online subsystem)

#

You can use GameSparks

#

to create and manage your game sessions

twin juniper Aug 28, 2018, 6:39 PM

#

Free?

ancient dew Aug 28, 2018, 6:39 PM

#

yes, free for development

#

but it is very cheap when u go to production

twin juniper Aug 28, 2018, 6:39 PM

#

But I don't have any money

#

I'm 14 btw

ancient dew Aug 28, 2018, 6:39 PM

#

u won't need it

#

unless your game does success

#

search for GameSparks and be happy

twin juniper Aug 28, 2018, 6:40 PM

#

What if it does, I can't pay anything

ancient dew Aug 28, 2018, 6:40 PM

#

btw, I guess steam is the easiest way to go

#

Why can't you use steam?

twin juniper Aug 28, 2018, 6:40 PM

#

Cuz I have to pay 100 eur to add it there

#

And it doesn't work without being on steam when packaged

ancient dew Aug 28, 2018, 6:41 PM

#

100 usd *

twin juniper Aug 28, 2018, 6:41 PM

#

Ok 9p eur

#

90*

ancient dew Aug 28, 2018, 6:41 PM

#

well, you need to think that a matchmaking requires a server, it is a computer 24/7 online

twin juniper Aug 28, 2018, 6:41 PM

#

Yeah

ancient dew Aug 28, 2018, 6:42 PM

#

You can use steam test id, and if you see your game is working well you can create a kickstarter

#

raise money and pay for the server costs

twin juniper Aug 28, 2018, 6:42 PM

#

But I was asking those 3 first questions about the "open <ip>" way because I knew I need money to get normal matchmaking

ancient dew Aug 28, 2018, 6:42 PM

#

talk to your parents about your idea and that you will need to deal with money in the case it goes well

#

Even with direct IP, you will have to store the sessions in somewhere. You will need a database. If you know how to code servers, you can host a PHP + Mysql server for free in somewhere, and save/load data from there

#

but it is pretty hard to do

twin juniper Aug 28, 2018, 6:44 PM

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Then I can only join servers and nothing else with ip at the moment

ancient dew Aug 28, 2018, 6:44 PM

#

yes

twin juniper Aug 28, 2018, 6:44 PM

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Well it's not that bad

#

I wanted the checking if ip is available to just save ip of the server you join so you don't have to type it again and just join ir from saved ips list

#

But I can still do in the text box a thing that you can autofill it with some ip that you joined before

ancient dew Aug 28, 2018, 6:46 PM

#

use savegames

twin juniper Aug 28, 2018, 6:46 PM

#

Sorry for my very bad explanation skills, not my primary lang

#

Yes I was planning to use savegame

#

I already use it for sensitivity and motion blur setting, can just add an ip string variable

#

And every time you press join and ip box is valid it saves that to array, if it fails (by delay because if it works then nothing will happen because level changes) it will just delete the ip if it wasn't already in the array

#

Anyways thanks for clearing things up 😄

#

Oh 1 more thing, does ip connect need a port in the string?

ancient dew Aug 28, 2018, 7:42 PM

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I'm not sure, but if it does the default port is 7777

cloud ledge Aug 28, 2018, 7:46 PM

#

It does not need a port, but it can accept a port

gusty spire Aug 28, 2018, 9:48 PM

#

Hello guys so I'm having trouble with seamless travel. So the players join some lobby and at some point the server launches the game map using the command servertravel <path>. The players successfully connect to the map , but here is the problem: none of the functions work! it just seems like the player controllers are inexistent. Here are some screenshots of how the events are being executed. https://i.imgur.com/enpfOns.png -> https://i.imgur.com/q1602bq.png , https://i.imgur.com/gZOXDUp.png. So the "initialsetup" event is called from the OnSwapCharacters event in the Gamemode by casting to the PC. So the function SetupWidgets should show some UIs on the viewport , something which doesn't happen. Still, the function is being executed since the player sees the debug on its client ( https://i.imgur.com/DfqJ7yT.png ). Also , here is the log on the server with the seamless travel part (Im using dedicated server) : https://i.imgur.com/o4CKEJb.png . I would really appreciate a solution to the problem.

Imgur

sonic frigate Aug 28, 2018, 11:11 PM

#

hey, has anyone here experience with gamespark ? I have a multiplayer project(unreal networking) i have made the a working login with gamespark , but i do not know how should i set up a basic deathmatch work with gamesaprk real time matchmaking , anyone made something similiar ( bluerpint project )

slate veldt Aug 28, 2018, 11:22 PM

#

@gusty spire Do you have a player start in your level?

#

If you do, check it isn't marked as BAD

#

Seems like your game mode is struggling to select a suitable Start Point for your player, if you've written some custom code for selecting a spawn point - that's failing. If not, then it should return true by default for any spawn point you feed into the query

#

Also, more specifically to your problem, it looks like you add SCRef to viewport, but not SBRef? Is that what you want to be doing?

grand kestrel Aug 28, 2018, 11:27 PM

#

@sonic frigate Personally myself and many others would avoid using gamesparks realtime because it doesn't use UE4 networking, which means you're missing out (it's very powerful) and your game will be tied to a service which could die, change ownership, change direction, etc without warning, just use the other services and host the game yourself

wintry ruin Aug 28, 2018, 11:33 PM

#

do you know why changing a material server side is not replicated to clients? I dont see a case where you want this to not replicate, but seems to be the default behaviour

#

I had to manually replicate myself the material changes on meshes

#

but I still feel im missing something

#

is there another way?

grand kestrel Aug 29, 2018, 12:55 AM

#

Mildly aggravated right now. Specifically want to not call super on AActor::GetLifetimeReplicatedProps while still replicating bTearOff but they made the damn thing deprecated and added getter/setters

#

Bit of an oversight on their part.. I think?

#

Where do I go to complain to ensure this deprecation never actually happens

unique thunder Aug 29, 2018, 1:01 AM

#

im trying to trigger a respawn sequence that checks the playerstate for a Name value and then spawn & possess a character through a Switch on Name but it isn't working. should I be accessing the playerstate locally then executing on server? I don't know why it won't work (ded servers, but im testing in local PIE with server / client)

#

https://blueprintue.com/blueprint/lo67acgy/

BlueprintUE.com

anonymous

Respawn

#

(Respawn sequence = server RPC)

topaz agate Aug 29, 2018, 2:00 AM

#

How do you generally go about making a game multiplayer? @topaz agate

digital yacht Aug 29, 2018, 3:44 AM

#

u know u pinged yourself there right? @topaz agate

sharp pagoda Aug 29, 2018, 3:53 AM

#

@unique thunder You're trying to possess/unpossess as the client, not going to work. Also a much better and cleaner approach to that would be to have the player controller -> on death -> set server sided timer to call gamemode -> OnRespawn(AController* c) -> which does the team specifics and what not

topaz agate Aug 29, 2018, 3:54 AM

#

Yeah. It’s so I can search it in case the channel turns out to be active and then see any responses @digital yacht

sharp pagoda Aug 29, 2018, 3:55 AM

#

Also don't tell the server what team you're on, that's a vector for cheating. The server already knows what team the dead player is on

unique thunder Aug 29, 2018, 3:57 AM

#

@sharp pagoda When a player dies I spawn a "ghost pawn" and possess that, no one can see them and they can't move etc. In the ghost pawn, I trigger a delay OnPossessed and then execute the logic to transfer the player back into a playable pawn depending on which team they have set in their playerstate. When I execute possess/unpossess logic on server, nothing happens

digital yacht Aug 29, 2018, 3:59 AM

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oh u smart @topaz agate

severe widget Aug 29, 2018, 4:00 AM

#

you know you can copy links to discord messages?

#

https://discordapp.com/channels/187217643009212416/221799385611239424/484180598429057034

#

📎 unknown.png

sharp pagoda Aug 29, 2018, 4:02 AM

#

@unique thunder 1. Still run the respawning code in the gamemode, that's the place to do it. 2. Run the unpossess from the server only, don't even bother running it on the client. Controller is replicated, thus OnRep_Controller(), so you don't have to worry about the client receiving the update to possess the ghost pawn

unique thunder Aug 29, 2018, 4:04 AM

#

@sharp pagoda im just learning to use the gamemode now, im not entirely sure how to communicate with it and how the gamemode should be made aware of things. For example, on death > cast to gamemode > execute server logic to unpossess the dead player and give them the ghost pawn with a delay to bring them back? What if 2 players die in a row, will the gamemode execute the logic separately and at the same time via one event sequence?

sharp pagoda Aug 29, 2018, 4:04 AM

#

No, have the timers run in the player controller

#

Each pc should manage it's own respawn, but the game mode should run the actual code to respawn

#

Note that the server should only be made in charge of telling the game mode to respawn, (timer handle on the server only)

unique thunder Aug 29, 2018, 4:05 AM

#

so the PC would tell the gamemode when to spawn and possess a player but their delays etc. would still be in the PC

sharp pagoda Aug 29, 2018, 4:07 AM

#

I'll give you an example in the game I'm working on. MyCharacter.OnDeath() -> GetController.OnDeath -> If (server), set timer to call Controller::Respawn -> Controller::Respawn() does gamemode.RequestRespawn(this)

#

PC doesn't tell the game mode "when", it tells it to respawn me when I'm ready

unique thunder Aug 29, 2018, 4:09 AM

#

I can somewhat understand that but it's a BP-only project. So when the PC decides you're ready to respawn and it tells the gamemode to do it, how exactly does it tell the gamemode which player its respawning? I imagine that a respawn event is triggered inside the gamemode but it has to be fed a playercontroller, yeah?

sharp pagoda Aug 29, 2018, 4:09 AM

#

Pass in a pointer to the controller requesting respawn

unique thunder Aug 29, 2018, 4:10 AM

#

Makes sense. What happens if 2 players die in the same frame? 😜

#

Game mode is triggered twice in one tick, two PCs trying to tell it to respawn them

#

I know it's very unlikely but what would happen?

sharp pagoda Aug 29, 2018, 4:11 AM

#

Not a concern, timers run in the game thread 😉

#

No race conditions here

unique thunder Aug 29, 2018, 4:11 AM

#

cool - I'll give this a shot, thank you

sonic frigate Aug 29, 2018, 7:05 AM

#

@grand kestrel Actually i want to create a multiplayer co op game ( like warframe. as a match) , but basic unreal engien cannot handle if the host quit from the game, or just lost his connetion.)

rose egret Aug 29, 2018, 7:20 AM

#

how do I know my game mode created for a dedicated server. is there any event to inform us we are listening for connection?

slim holly Aug 29, 2018, 8:13 AM

#

@sonic frigate it's not rocket science tho, you can make the system that can resume session from snapshot if host disconnects

#

and not like warframes system is perfect either, it often fails to transfer session ownership

unique thunder Aug 29, 2018, 10:49 AM

#

cast to game mode > set score
cast to widget > set score

Only server sees the widget update, everyone sees the game mode update - why?

slate veldt Aug 29, 2018, 11:54 AM

#

Has anyone here worked with the Lobby system?

Whilst it all seems to be going through the motions correctly in terms of setting up the client beacon and ports etc, for some reason I never get the OnConnected delegate

It seems like the server isn't correctly setting PlayerState in the LobbyBeaconClient as it's Null when I try to access it (through a child class, it's a protected member but the child class obviously has access to it)

unique thunder Aug 29, 2018, 12:09 PM

#

@slate veldt There's no guarantee that the playerstate will have replicated when the client loads up, sometimes it takes a small amount of time.

#

📎 unknown.png

#

You can use this on beginplay to only execute your logic when the PS is confirmed replicated and usable

#

In my case:

#

📎 unknown.png

#

I only bind the OnRep event if the PS is confirmed invalid, otherwise proceed. Should be bug-free

slate veldt Aug 29, 2018, 12:15 PM

#

Hey, thanks for this, I'll take a look after, but I think I might have found the problem. Online there is someone who has a similar issue, and it looks like you need to create an AOnlineBeaconHost first, InitHost() on that, then Init the LobbyBeacon, and then register it to the AOnlineBeaconHost, and then SetupLobbyState on the Lobby beacon

#

I hadn't created an AOnlineBeaconHost or called the named functions on it as in this guide here...

#

https://answers.unrealengine.com/questions/405609/is-lobbybeaconstate-replicated.html

slate veldt Aug 29, 2018, 1:13 PM

#

@unique thunder I've just properly read your reply, it's not what I'm looking for at all. There is a PlayerState in LobbyBeaconClient which is of type ALobbyBeaconPlayerState

#

The LobbyBeaconClient calls "ConnectToLobby", and the should eventually result in the OnConnected function being called.

Despite the handshake taking place between the Lobby and Client beacons, something clearly doesn't follow through as it's never fully setup which should finish in the "OnConnected" function call

#

ConnectToLobby executes, and passes through with bSuccess set to true

slate veldt Aug 29, 2018, 4:08 PM

#

If anyone here has used LobbyBeacons I would very much appreciate a few minutes of your time to ask you some questions - Getting some interesting log print outs that I'm not sure are the desired effect

red ledge Aug 29, 2018, 4:53 PM

#

@slate veldt sorry but can I ask where is this system and what are you using it for exactly? I saw some users talking about Beacons here maybe a year ago but I never got what it's usually used for
I think for setting up players with other players when you have a listen server before they actually connect?

slate veldt Aug 29, 2018, 4:57 PM

#

@red ledge
Yes sort of, so basically the beacon system allows for users to communicate data without travelling to servers or fully connecting. For instance, you could host a lobby on the main menu (without travelling to a lobby map or game mode) and then other players can find the session that has been hosted, startup communication, and associate their ClientBeacon with the Host player's HostBeacon.

This is the sort of functionality that allows for things such as gameplay parties to take place in the main menu in games such as Player Unknown's BattleGrounds (PUBG), Overwatch, and many many others.

A brilliant advantage is that you can connect players quickly without Server Travel, allowing them to reserve their slot in a session (and see other connected players, current game settings etc). You then perform the sever travel for ALL players once the host hits "Start" which then fully connects all the Beacon players into the game and they will load up the map, game mode etc.

#

The functionality is in the Engine Plugin OnlineFramework (in the Lobby Module) and it is based upon the Online Beacon system (Which has many uses).

The idea is that when you Host a new session, you create a LobbyHostBeacon, and register that with your OnlineBeaconHost.

When a player chooses to join your advertised Session (through Find Sessions then JoinSession) you can create a LobbyBeaconClient, and provide the session information. It will then use this information to establish a connection with the Host's LobbyBeaconHost so they can share information such as their player name, avatar, player level, anything that you want to communicate on a game's "Lobby" screen.

#

Currently, my ClientBeacon is using session information to begin connecting to a HostLobby, which all begins and does network handshakes etc. however, somewhere along the line (which I've been investigating most the day) something fails which results in the final stages of connection not taking place (part of which is the PlayerLogin, and the OnConnected delegate function)

#

Also, additional point to link back around to what you said - Yes, the Host doesn't actually great a listen server quite yet, this would happen after all the players are connected in the "Lobby" and the host presses the games "start" logic. This would then Host a Listen server and tell all connected players in the Lobby system that a game is beginning and they are going to travel to it

#

It also has built in functionality to allow for kicking of players, promoting another player to host. and you can easily build more functionality in such as PlayerReadyUp (which you would add into the LobbyBeaconPlayerState class override) etc

red ledge Aug 29, 2018, 5:06 PM

#

ah okay got it thank you so much for this write up!

#

I would be working on a game that is like a paragon demo and I think this would be useful

slate veldt Aug 29, 2018, 5:07 PM

#

No problem, the unfortunate thing is, there isn't a lot of Documentation online about it all, and I've pieced most of it together, but there are clearly a few final steps that are preventing the whole thing from working properly

#

Once I'm done, I think I'll write up a tutorial for the community

red ledge Aug 29, 2018, 5:08 PM

#

I thought that it only worked with listen servers but I think that it would work nicely with dedicated servers as well

#

that would be nice

#

if you could remember, tag me in that

sharp pagoda Aug 29, 2018, 5:08 PM

#

Wow discord did not format that well

slate veldt Aug 29, 2018, 5:09 PM

#

Yes, as I said, you just need to host a session, not a server - the server part comes afterwards, which is the beauty of it, you could take the lobby into a dedicated server matchmaking, or their own custom listen servers with funky game modes

sharp pagoda Aug 29, 2018, 5:09 PM

#

📎 unknown.png

slate veldt Aug 29, 2018, 5:10 PM

#

@sharp pagoda Thanks for the information, any chance I could DM you to ask some questions about it all? Would be good to give you a proper insight of my understanding thus far then you might be able to fill in the blanks for me

#

Or even hopping into a channel to chat

sharp pagoda Aug 29, 2018, 5:10 PM

#

DEFINE_CONTROL_CHANNEL_MESSAGE_ZEROPARAM(BeaconWelcome, 25);
DEFINE_CONTROL_CHANNEL_MESSAGE_TWOPARAM(BeaconJoin, 26, FString, FUniqueNetIdRepl);
DEFINE_CONTROL_CHANNEL_MESSAGE_ONEPARAM(BeaconAssignGUID, 27, FNetworkGUID); 
DEFINE_CONTROL_CHANNEL_MESSAGE_ONEPARAM(BeaconNetGUIDAck, 28, FString);

#

Hook into those delegates and you should be able to find the issue pretty easily

#

Can't call right now, but feel free to dm me your questions

slate veldt Aug 29, 2018, 5:11 PM

#

Fantastic, thank you so much. I'll DM you now

meager spade Aug 29, 2018, 9:42 PM

#

i have a FGameplayContainer which contains my AI's tags, what is the best way to replicate said container

mighty quarry Aug 29, 2018, 10:05 PM

#

hi all, first time here!
By anychance does anyone have experience with Dynamic Combat System off the Marketplace?
I ask cuz I really love it but have no clue how to replicated it properly to allow mulitplayer, any suggestions would be awesome!

twin vault Aug 29, 2018, 10:42 PM

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how do i know if the code is executing on client or server while debugging C++

vagrant falcon Aug 29, 2018, 10:58 PM

#

hi, what is best performance based decision for world composition tiled build size if whole world is 8x8km
253 or 505 or should i cut to bigger pieces like 1k or 2k

celest sigil Aug 30, 2018, 1:17 AM

#

Ok....I thought I had this figured out the other day but it's still not working as intended. I'll repost what I asked yesterday. I know it's simple but it's giving me fits.

#

Hey guys, I'm having a brain fart. I've made a shield system, and the shield will have different attributes depending on what spell you have enabled.

For instance, I'm having problems right now with one of the spells.

While Fire is Enabled, if the enemy player (client) shoots a Fireball at the Server that has a fireshield turned on, I want the Server to receive 10 magic power by absorbing the attack. The problem is it's updating the Magic for both the server and the client.

#

📎 Magic_Absorb.jpg

winged badger Aug 30, 2018, 2:44 AM

#

overlap executes on both client and server, and GetPlayerController[0] has different context on them

#

doing 2 Casts in a row is also nonsensical

#

using GetPlayerController[index] and GetPlayerCharacter[index] outside of scope where you use them to grab the players in local non-networked coop requires you to know what you are actually doing, its not a magic bullet

#

on Client, GetPlayerController[0] is always the first local controller, as there are only local controllers present

#

on ListenServer, its usually the host machines first local controller

#

on Dedicated Sever, its the controller of whichever player logged in first

#

if i had any idea what BP_Fire_Def_01 actually is, i could tell you how to fix it, but as it is not enough information @celest sigil

celest sigil Aug 30, 2018, 2:54 AM

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Fire def is the shield, and on the hit event I'm casting to the fire attack to know if the attack is fire based.

winged badger Aug 30, 2018, 2:54 AM

#

it is what? an actor component?

#

attached to what? target of the attack?

#

and as long as BP_Fire_Atk_01 inherits from Lous_BaseProjectile, the first cast is redundant

#

if it does not inherit from it, then one of the Casts will always fail

#

so, 2 in a row make no sense

celest sigil Aug 30, 2018, 2:59 AM

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The shield is an actor, I'm not sure if I understand the other questions.

winged badger Aug 30, 2018, 2:59 AM

#

that is... unfortunate

celest sigil Aug 30, 2018, 3:00 AM

#

When I spawn the shield I attach it to the player character

winged badger Aug 30, 2018, 3:00 AM

#

does it at least know who its owner is?

#

yeah, you could do the same with a component, avoiding a lot of problems along the way

#

anyways, you want to get the target of the attack from the context of shield

#

not via gameplay statics

celest sigil Aug 30, 2018, 3:03 AM

#

Ok I thunk I know what you mean now.

winged badger Aug 30, 2018, 3:03 AM

#

if you type in "attach" into context you'll have GetAttachedParent or some such

celest sigil Aug 30, 2018, 3:03 AM

#

Think*

winged badger Aug 30, 2018, 3:03 AM

#

that would be your PlayerCharacter, which is the target

#

you'll have an actor reference, so you will need to Cast it to Pawn, then access PlayerState

#

from that reference

celest sigil Aug 30, 2018, 3:07 AM

#

Awesome, that put me on the right track. Thank you.

fringe dove Aug 30, 2018, 3:59 AM

#

is this for real? https://issues.unrealengine.com/issue/UE-24772

#

I've written a ton of stuff around reliable multicast being reliable...

#

that isn't safe to assume?

#

is it reliable for regular non-multicast reliable? (I can manually do the fan out if I have to through that)

#

I ran into this while paused in the debugger long enough to get 'UNetDriver::TickDispatch: Very long time between ticks.', but not long enough to get disconnected due to time out

twin juniper Aug 30, 2018, 8:00 AM

#

how to make servertravel work with multiplayer?

rotund wedge Aug 30, 2018, 8:13 AM

#

oh oh

rotund whale Aug 30, 2018, 8:18 AM

#

are there any known bugs with RPC and instanced static meshes?

#

I'm experiencing constant crashes with RPC to client -> Clear ISM / Add Instance

plain flume Aug 30, 2018, 8:21 AM

#

When does the actor doesn't have the owning connection? I have some actors where Replicated functions works fine and some actors there is notify that owning connection is missing?

winged badger Aug 30, 2018, 8:41 AM

#

@plain flume not owned by a PlayerController

plain flume Aug 30, 2018, 8:42 AM

#

I was just reading about that. So if I would manually call function SetOwner and pass my character for example. It would work then?

winged badger Aug 30, 2018, 8:49 AM

#

normally its the PlayerControlled, possessed Pawn, PlayerState, any of their Components and Actors attached to them and their Components

#

that can use Server or receive Client RPCs

#

calling SetOwner just to push one would likely break something along the way

plain flume Aug 30, 2018, 8:58 AM

#

Hmm. In my case I had a level that had a pickUp item. I wanted to server set FVector variable that has OnRep flag. So when server moves it, Clients move it also. So the RPC call didn't work. What I did was to circle the reference through my Pawn and called server function from there. Just wondered if that is the right way, or should I set PC as owner to actor in somewhere.

winged badger Aug 30, 2018, 9:25 AM

#

that is ok

hardy dome Aug 30, 2018, 2:12 PM

#

Hey there bros

#

Anybody used Ultimate VoiceChat plugin (https://www.unrealengine.com/marketplace/ultimate-voicechat-for-blueprints)? Does it work without sessions (Direct IP connection) on 4.18?

drifting plank Aug 30, 2018, 3:06 PM

#

Hello there :)
I'm wonder what is a good average of the bandwith use per client per second ?

Also did you know a good documentation to how to use the netprofiler of Ue4 or if you know some useful tools to profile the netstats.
Thanks in advance 😉

fringe dove Aug 30, 2018, 4:37 PM

#

@drifting plank heavily depends on dedicated server vs client hosted

drifting plank Aug 30, 2018, 5:38 PM

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We use a dedicated server =)

unique thunder Aug 30, 2018, 5:42 PM

#

i have an actor that sends a float to the gamestate which then sends the float to a widget. for some reason the float doesn't update on clients or server (in the widget) but if I die and respawn, I see the correct score (because the event construct in the widget casts to the GS and gets the updated score) - why can't I update the Text in the widget via events in real-time?

#

📎 unknown.png

#

📎 unknown.png

#

📎 unknown.png

drifting plank Aug 30, 2018, 5:54 PM

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"Update Red Score" or "Update Blue Score" are never called

modest dock Aug 30, 2018, 5:54 PM

#

On the custom events named “UpdateScore - Red” and “UpdateScore - Blue” set the replication to multicast

#

Also that ^

unique thunder Aug 30, 2018, 5:55 PM

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@drifting plank They're called in the repnotify in that same BP

drifting plank Aug 30, 2018, 5:55 PM

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Yep but where is these functions ?

unique thunder Aug 30, 2018, 5:55 PM

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@modest dock The events you mentioned are in the widget, isn't that local-only anyway?

drifting plank Aug 30, 2018, 5:55 PM

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You didn't show them to us

unique thunder Aug 30, 2018, 5:55 PM

#

@drifting plank "BattleUI" is a reference to the widget and those events there are triggered in the widget (last screenshot)

drifting plank Aug 30, 2018, 5:56 PM

#

So the OnRep Red Score calls the custom event "Update Red Score" ?

unique thunder Aug 30, 2018, 5:56 PM

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Yes

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Which then triggers an event in the widget to locally update the score there (textrender)

drifting plank Aug 30, 2018, 5:57 PM

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Use some print to debug or directly with the Unreal Blueprint Debuguer

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Proceed step by step 😉

unique thunder Aug 30, 2018, 5:58 PM

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this system worked when there was only 1 widget in the level itself, now im trying to add the widget to each player

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But

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the way the GameState knows the widget reference

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is the widget casts to it and sets itself as the variable

drifting plank Aug 30, 2018, 5:59 PM

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Where is stored the widget ?

unique thunder Aug 30, 2018, 5:59 PM

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so if multiple players have widgets overriding the variable in GameState, could be the reason?

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widget is stored in GameState

drifting plank Aug 30, 2018, 5:59 PM

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Do you init the widget in all client ?

unique thunder Aug 30, 2018, 6:00 PM

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every client creates and sets the widget local in the player BP

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then that widget casts to gamestate and sets itself as the gamestate's variable for the widget

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seems off

modest dock Aug 30, 2018, 6:00 PM

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Maybe do an event tick with a node and that node connects to the ones you have so it always updates

drifting plank Aug 30, 2018, 6:00 PM

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And you set correctly the reference of it in gamestate for each client ?

unique thunder Aug 30, 2018, 6:00 PM

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yeah, it works if there's only 1 widget in the level.

modest dock Aug 30, 2018, 6:00 PM

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I’m just trying to throw in ideas I’m usually the one that needs help

unique thunder Aug 30, 2018, 6:01 PM

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naw, could definitely avoid event tick on this

drifting plank Aug 30, 2018, 6:01 PM

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Yup

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Can you use this to help me to understand ?
https://blueprintue.com/

BlueprintUE

PasteBin blueprints For Unreal Engine 4

BlueprintUE.com is a tool for sharing, rendering and rating blueprints for Unreal Engine 4. UE4 is a game engine which use visual scripting called blueprint.

modest dock Aug 30, 2018, 6:01 PM

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Did you cast it to the player co troller

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Controller*

drifting plank Aug 30, 2018, 6:02 PM

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Paste all your blueprints 😉

unique thunder Aug 30, 2018, 6:03 PM

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1 sec

drifting plank Aug 30, 2018, 6:03 PM

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No problem

unique thunder Aug 30, 2018, 6:04 PM

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In order:

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PlayerBP creates widget

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📎 unknown.png

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Widget beginplay

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📎 unknown.png

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Actor determines that Red has scored, repnotify

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📎 unknown.png

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Repnotify calls event

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📎 unknown.png

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Inside gamestate ^

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Gamestate takes score and then runs a repnotify

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📎 unknown.png

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Gamestate repnotify calls event inside gamestate

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📎 unknown.png

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That event calls the widget and triggers an event inside it

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📎 unknown.png

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Widget updates score.

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📎 unknown.png

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That's it

drifting plank Aug 30, 2018, 6:06 PM

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You didn't need to write some text on your screens, you can add some comment on your nodes ^^

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Ok I will try to find what is wrong

unique thunder Aug 30, 2018, 6:08 PM

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Note: this works with 1 widget available. when more than one widget exists, i think they're overriding the gamestate's widget reference

drifting plank Aug 30, 2018, 6:09 PM

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Except the boolean "Scoring Red" witht the OnRep Red Owned.
All seems to be fine 😮

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Oh

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So you need to check if the player is the local player

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It works for one client, no ?

unique thunder Aug 30, 2018, 6:09 PM

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yes

drifting plank Aug 30, 2018, 6:09 PM

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And all others are bugged ?

unique thunder Aug 30, 2018, 6:10 PM

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there's only 1 gamestate thats persistent in a server right?

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(and no, its bugged for everyone if more than one player exists)

drifting plank Aug 30, 2018, 6:10 PM

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Yep

unique thunder Aug 30, 2018, 6:10 PM

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ah okay

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so that might be it then

drifting plank Aug 30, 2018, 6:10 PM

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Hum

unique thunder Aug 30, 2018, 6:10 PM

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maybe i need to multicast from the gamestate to tell every widget to update their score

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just not sure how to reference the widgets then

drifting plank Aug 30, 2018, 6:10 PM

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I think the widget is probably created for each replicated actors of your clients

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For all clients

unique thunder Aug 30, 2018, 6:11 PM

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it is, yes

drifting plank Aug 30, 2018, 6:11 PM

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So you need to spawn the widget only for the local client

unique thunder Aug 30, 2018, 6:11 PM

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hmm

drifting plank Aug 30, 2018, 6:11 PM

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I will retrieve you the nodes that I used to do that

unique thunder Aug 30, 2018, 6:11 PM

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well

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yes but,

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im still using the widget to set the widget reference in the gamestate as itself

drifting plank Aug 30, 2018, 6:12 PM

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Yep

unique thunder Aug 30, 2018, 6:12 PM

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so the gamestate will track multiple references in a single variable if its local?

drifting plank Aug 30, 2018, 6:12 PM

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GameState is an actor replicated on all clients

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No

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Each client will reference their own widget (The local gamestate will contains only one reference)

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Actually the reference is override each time a new widget is created

unique thunder Aug 30, 2018, 6:13 PM

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but the gamestate tells the widget to update the score, which widget will it talk to?

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yeah

drifting plank Aug 30, 2018, 6:13 PM

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The last reference stored

unique thunder Aug 30, 2018, 6:13 PM

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wait, maybe i can multicast with "get all widgets of class" ?

drifting plank Aug 30, 2018, 6:13 PM

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So logically the n-th widget

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of your n-th client

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So try to check your client N and check if the widget works. I think that It works on it

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You just have to set the property in the gamestate only once (for the local client).

unique thunder Aug 30, 2018, 6:15 PM

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yup, works now

drifting plank Aug 30, 2018, 6:15 PM

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Cool 😃

unique thunder Aug 30, 2018, 6:15 PM

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📎 unknown.png

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im not setting it at all

drifting plank Aug 30, 2018, 6:15 PM

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Oh it's a tricky hack x)

unique thunder Aug 30, 2018, 6:15 PM

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its just telling all the widgets haha

drifting plank Aug 30, 2018, 6:15 PM

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But is that work for all of your clients 😮 ?

unique thunder Aug 30, 2018, 6:16 PM

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yeah, all clients + server

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im just hoping the repnotify will still update late joins properly, will test

drifting plank Aug 30, 2018, 6:16 PM

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Hum it will be better to just check if the widget is owned by the locally controlled player but if that works. It's fine !

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I've done that in an old project
But it works not for a client which host a game.
In C++ I know how to do that but in Bp, it seems that the Role isn't available 😦

#

I repeat my questions because I didn't find any good solutions for the moment :

I'm wonder what is a good average of the bandwith use per client per second (for a dedicated server) ?
Did you know a good documentation to how to use the netprofiler of UE4 ?

Also did you know a good tutorial to create a dedicated server with the OnlineSubsystem linked to steam ?
We have an error with the steam_client64.dll, after this error, Steam is correctly initialized but we don't detect the server on the steam server list in the tab "internet", however "lan" tab works.
Finally when we try to connect to the server, we have a bunch of the same error "Unkown or unsupported data type". it seems that an issue with the appId but we didn't have a steam dev account for the moment ? is that a problem with that ? Is that another solution to test without that ?

Thanks in advance 😉

zinc zealot Aug 30, 2018, 7:57 PM

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hey guys

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isnt this

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supposedly

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right ?

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📎 unknown.png

rose egret Aug 30, 2018, 7:58 PM

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can someone help me with some questions about steam and mutiplayer :(
I want to use some of steam APIs which are not available through OnlineSubsystem. my first question is can I use steam callbacks and interfaces along with OnlineSubsystemSteam? what if the callback that I want to register is registered by OnlineSubsystem somewhere else?
if I just use steam APIs directly how should I handle steam overlay rendering ?

zinc zealot Aug 30, 2018, 8:13 PM

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if someone could help me

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📎 unknown.png

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📎 unknown.png

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i even made some animations for it

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when the server has the pistol

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(lower part)

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you see the animation and the pistol

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when a client has the pistol

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other client doesnt see the pistol nor the animation

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and the server sees the pistol but not the animation

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idk what im doing wrong

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📎 unknown.png

fringe dove Aug 30, 2018, 8:36 PM

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what are all the scenarios where reliable RPCs can get dropped without the client timing out? I ran into it with reliable multicast rpcs but am wondering about others

manic pine Aug 30, 2018, 8:39 PM

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short of the actor being destroyed on the same tick as the RPC was sent/received, i dont think there are any

fringe dove Aug 30, 2018, 8:40 PM

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@manic pine I'm not sure exactly what it does yet and implications to reliable RPCs, but there is a 'RelevantTimeout=5.0' variable by default that is lower than connection timeout

manic pine Aug 30, 2018, 8:41 PM

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yeah, though id say chances are pretty good that if client loses connection for 5 seconds its kinda over and out anyway

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connection timeout is 20 or so?

fringe dove Aug 30, 2018, 8:43 PM

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@still kite I think so, but if I ever drop reliable rpcs I'd rather the client be disconnected than see the drops happen

manic pine Aug 30, 2018, 8:43 PM

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hmm, the only reference in the code i find to RelevantTimeout is for determining actor relevancy

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not relevant rpc timeout

fringe dove Aug 30, 2018, 8:45 PM

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ok, that should be good, I'll do some testing with non-multicast reliable rpcs

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I think I'm going to have to manually fan things out to each client instead of using multicast

manic pine Aug 30, 2018, 8:46 PM

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yeah, if relevant rpcs failed and you depend on them it could cause quite the mess

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i always thought they'd just keep sending until successful

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but then i prefer using replicated vars for important client information anyway

fringe dove Aug 30, 2018, 8:47 PM

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yeah this is for player input to a networked emulator thing, has to be reliable to stay deterministic

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I also send duplicate input packets over unreliable to keep latency down if there is packet loss that requires full RTT for the reliable channel

manic pine Aug 30, 2018, 8:49 PM

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hmm sounds like a lot of work to keep in sync

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not sure how often the reliable RPCs retry though, so maybe its worth it

fringe dove Aug 30, 2018, 8:58 PM

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does the engine have any bandwidth detection features?

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I thought AGameNetworkManager did it with MaxDynamicBandwidth, but just looked and all that does is:

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int32 AGameNetworkManager::CalculatedNetSpeed()
{
    int32 NumPlayers = 1;
    AGameModeBase* GameMode = GetWorld()->GetAuthGameMode();

    if (GameMode)
    {
        NumPlayers = FMath::Max(GameMode->GetNumPlayers(), 1);
    }

    return FMath::Clamp(TotalNetBandwidth/NumPlayers, MinDynamicBandwidth, MaxDynamicBandwidth);
}```

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raises bandwidth on listen servers based on how many players are connected

manic pine Aug 30, 2018, 9:01 PM

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yeah, TotalNetBandwidth is just an ini setting

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calculatenetspeed then returns max bandwidth to use for a single player

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i guess the point is more to force the game to use the least amount of bandwidth

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not sure how much the bandwidth cap matters for (reliable) replication though

fringe dove Aug 30, 2018, 9:08 PM

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yeah I'm not needing it for the reliable thing

bleak lily Aug 30, 2018, 11:50 PM

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https://www.youtube.com/watch?v=DTNO4kULts4 anyone know how to replicate this properly

YouTube

Tesla Dev

Unreal Engine 4 Tutorial - Simple Line Trace Weapon

In this tutorial we are going to edit the default weapon from the blueprint fps project and turn it into a line trace weapon that spawns explosions upon hitt...

▶ Play video

#

I tried making it an RPC but that doesnt do much

sharp pagoda Aug 31, 2018, 2:40 AM

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@bleak lily Run the trace on the server (and the client locally as well if you need to), and then from the server call a multicast RPC to spawn the emitter at some parameterized location

hardy cape Aug 31, 2018, 8:23 AM

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So I made a "sticky grenade" type projectile where after you shoot it, it stops moving on its first hit. I did this by setting the velocity of the projectile to 0 and the gravity scale to 0 as well. When run normally in the editor this works, but when i check the box for "dedicated server" it does stop moving, but it still falls from gravity. Anyone know why?

sleek dove Aug 31, 2018, 8:27 AM

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Anyone knows when I am on the client it spawns two static meshes?
https://blueprintue.com/blueprint/2-5qcsa4/
https://youtu.be/MmrOUw4-ZGs ??

The custom event Build is set to Run only on Server, the BP for the static mesh that gets spawned has the following settings :

📎 Screen_Shot_2018-08-31_at_09.15.41.png

BlueprintUE.com

Studder

replication double?

YouTube

Joey Hengst

replication error

▶ Play video

sleek dove Aug 31, 2018, 8:44 AM

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ah got it had to do an authority check

red ledge Aug 31, 2018, 9:34 AM

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@hardy cape do you set the movement and gravity on authority?

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@sleek dove most multiplayer problems are related to auth check haha

sleek dove Aug 31, 2018, 9:35 AM

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😄

winged badger Aug 31, 2018, 9:39 AM

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my vote goes to misuse of GetPlayerController[index] ^

hardy cape Aug 31, 2018, 9:44 AM

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@red ledge didnt help

red ledge Aug 31, 2018, 9:45 AM

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if it doesn't work on dedicated server, it's most like an authority problem

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can I see your code?

hardy cape Aug 31, 2018, 9:47 AM

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@red ledge sure, one sec

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https://blueprintue.com/blueprint/-c8cl57x/

BlueprintUE.com

anonymous

Grenade Hit Event

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i tried adding a "switch has authority" at the beginning and it didnt help