#multiplayer | Unreal Source | Page 409

umbral terrace Jul 22, 2018, 7:45 PM

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thanks

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@winged badger can you see any reason why my bp wouldnt make the health increase when my level goes up since thats the issue im having now

winged badger Jul 22, 2018, 7:47 PM

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SetHealth is not called?

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or called only on client

umbral terrace Jul 22, 2018, 7:47 PM

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hmm im new to this so i dont really konw

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it runs on the server oly

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only*

winged badger Jul 22, 2018, 7:48 PM

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i suggest making a LevelUp function

umbral terrace Jul 22, 2018, 7:48 PM

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Ah okay thanks

winged badger Jul 22, 2018, 7:48 PM

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that calls all the functions required to complete the leveling up

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like SetHealth

umbral terrace Jul 22, 2018, 7:54 PM

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If i have a function setting if variables should that be using switch has auth or not

rocky badger Jul 22, 2018, 8:20 PM

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I've been having this really weird bug where I have a simple trigger box. When I have two characters(of the same class) in the level and one of them overlaps with it, the trigger box detects BOTH characters. Could anyone know why?

twin juniper Jul 22, 2018, 8:27 PM

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@rocky badger might happen if you are using get all actors of class node

rocky badger Jul 22, 2018, 8:28 PM

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@twin juniper im in c++ and taking the "other actor" and casting it to my character class

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I have no idea why the overlap is called twice though

twin juniper Jul 22, 2018, 8:40 PM

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@rocky badger here is a powerup BP i use - can be translated into CPP possibly i think. just have to place the code in the trigger box itself or the spawn volume code, rather than the character class

📎 unknown.png

rocky badger Jul 22, 2018, 8:44 PM

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@twin juniper thank you! ill try it out after dinner and tell you how it goes

twin juniper Jul 22, 2018, 8:45 PM

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yw hope it works

rocky badger Jul 22, 2018, 9:25 PM

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@twin juniper sorry but your solution didnt work out

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I still can't seem to figure out why if one of my characters overlaps the trigger box, it some how says that my other character did as well.

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With three characters, if one overlaps, it assumes all of them have as well

steady briar Jul 22, 2018, 9:28 PM

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@rocky badger i think its because overlap events are run on the server as well, what kind of check are you doing?

rocky badger Jul 22, 2018, 9:30 PM

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@steady briar I've been using the standard

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OnOverlapBegin(UPrimitiveComponent * OverlappedComp, AActor * OtherActor, UPrimitiveComponent * OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult)

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I've had more stuff in the function but for now commented it all out and am just printing "OtherActor" on overlap

steady briar Jul 22, 2018, 9:32 PM

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ya i dont know C++ unfortunately. im dumb with bp too most of the time. also deleted my overlap thing but i can recreate the basics and u tell me if it makes sense? O.o

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also theres this annoying thing with dedicated server where when u overlap it does a Start, End, Start in 1 frame, can screw some stuff up

rocky badger Jul 22, 2018, 9:33 PM

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It's the OnOverlapBegin node and in bp terms im just dragging the other actor node and printing it

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its printing twice though in my case; once for each actor despite one of them not being even close to the trigger box

steady briar Jul 22, 2018, 9:35 PM

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is it printing the same name twice also?

rocky badger Jul 22, 2018, 9:35 PM

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No. Its accurately printing both actor names

steady briar Jul 22, 2018, 9:36 PM

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dunno how this translates but

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i think doing this will limit it to the overlapping person

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ok i guess it... blocked my image?

twin juniper Jul 22, 2018, 9:37 PM

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How can I go about adding host migration (listen server)? Once the current host has been terminated, how can I reconnect the previous clients to the new host? Is that even possible? I'm fine with c++

steady briar Jul 22, 2018, 9:37 PM

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📎 unknown.png

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ok i just re-copied and it let me post it.

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i think anything on that If branch going to true will be for the player who overlapped. anything off False will be everyone else?

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could be horribly wrong though

winged badger Jul 22, 2018, 9:38 PM

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@twin juniper host migration would involve a lot of work

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most of it would be going around the UE4 networking

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its not just the reconnecting clients to new host

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its a ton of information only server has and only server needs to be concerned about

twin juniper Jul 22, 2018, 9:39 PM

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I can imagine, but I don't really have a choice do I? I'm making a coop 4 player game, dedicated servers are too expensive and overkill for such a game... is there any other approach you recommend?

steady briar Jul 22, 2018, 9:39 PM

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host migration is a listen server thing right?

winged badger Jul 22, 2018, 9:40 PM

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by default, there is no GameMode or GameSession object on the clients

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AI controllers are configured not to replicate in any way

twin juniper Jul 22, 2018, 9:40 PM

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@steady briar yeah, if you have 4 players and one of them is the server, and then he disconnects, you need to find a new host to take over, otherwise it just zeroes everything out. Unreal doesn't support it

winged badger Jul 22, 2018, 9:41 PM

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plus, there is a lot of stuff that you only want to do server-side to conserve bandwidth, such as generating missions, spawning loot or whatnot

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and you would have to have all of it synced to the backup host in addition to solving the reconnect

twin juniper Jul 22, 2018, 9:41 PM

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yeah you're right, the issue is when the server disconnects it's impossible to pass that info to the new client-host

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yeah exactly

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should I switch engines 😅

winged badger Jul 22, 2018, 9:42 PM

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so, nobody i know did it, or suggested they knew someone who did

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might be doable to force the engine to maintain a server instance if it disconnects and allow for reconnecting

twin juniper Jul 22, 2018, 9:43 PM

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I can see why... do you know any way I can at least do the reconnect? Even if it restarts the level it's better than just a flat out disconnection

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ahh

winged badger Jul 22, 2018, 9:44 PM

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by default, UE will maintain disconnected PlayerStates

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which can allow clients to continue where they left off

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but i don't know how exactly would i go around implementing it

twin juniper Jul 22, 2018, 9:45 PM

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oh that's really useful

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it doesn't have to be seamless, but I can't just have it kick you out

winged badger Jul 22, 2018, 9:45 PM

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its a "graceful exit to main menu"

twin juniper Jul 22, 2018, 9:46 PM

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that's one way of looking at it 😂

winged badger Jul 22, 2018, 9:46 PM

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its what epic calls it

twin juniper Jul 22, 2018, 9:46 PM

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thanks for the help man

winged badger Jul 22, 2018, 9:47 PM

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i don't think clients would be able to continue if they close the game session

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only if they lost internet connection btw

twin juniper Jul 22, 2018, 9:48 PM

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What do you mean? If the listen server closed the game session vs lost connection?

winged badger Jul 22, 2018, 9:48 PM

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i mean (and educated guess here) that PlayerController's ID, which server would use to link it to a PlayerState on reconnect would not persist if you closed the game on client

twin juniper Jul 22, 2018, 9:49 PM

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but if only the listen server exited it should persist right?

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and they don't close the session

winged badger Jul 22, 2018, 9:49 PM

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PlayerState has the NetGUID

raven holly Jul 22, 2018, 9:50 PM

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Anyone have issues with dedicate servers not letting connections in after a week or so of running?

winged badger Jul 22, 2018, 9:51 PM

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basically, as i believe as long as you don't close the game after losing the connection on client, the NetId of your PlayerController will persist, and if you reconnect to the same game it will recognize you as you by it

twin juniper Jul 22, 2018, 9:51 PM

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right, makes sense, thank you

winged badger Jul 22, 2018, 9:52 PM

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server should in theory be able not to close the game if it loses connection

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as that state is more or less equivalent to all clients disconnecting individually

twin juniper Jul 22, 2018, 9:53 PM

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how do PvE (i.e diablo, monster hunter) games normally handle their networking without dedicated servers? it feels like I'm going about this incorrectly

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ohhh I see

winged badger Jul 22, 2018, 9:54 PM

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another caveat is if you are using something like Steam, its SDK might boot you out

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not sure

twin juniper Jul 22, 2018, 9:55 PM

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damn it just gets worse 😅

winged badger Jul 22, 2018, 9:55 PM

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on the bright side, steam lobby persists as long as someone is still connected

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so you could use it to matchmake the players back together

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as just the loss of a connection would not result in you losing the SteamLobbyID if you saved it to GI or some such

twin juniper Jul 22, 2018, 9:57 PM

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yeah that could also work

unique thunder Jul 23, 2018, 2:51 AM

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I'm hearing some sounds play twice and other sounds appear to only play once while testing multiplayer (local, 2 players - one server, one client). Is this normal?

rose egret Jul 23, 2018, 5:59 AM

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how do I create interactive session by OnlineSubsytem. I have a session room. players must select their location on a mini map and their options and + chat room.
is that all possible with session apis? how do I update session options?

unique thunder Jul 23, 2018, 11:12 AM

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I can't find any info on this online but, what type of variables do not need to be replicated? Booleans inside already replicated logic inside already replicated actors?

bitter oriole Jul 23, 2018, 11:14 AM

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Well if you have an animation based on the character state, you should replicate the state, and adjust the animation based on it, rather than also replicate the animation

unique thunder Jul 23, 2018, 11:14 AM

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I'm setting a few local booleans that determine whether a gun is able to shoot, reload, etc. based on its current state

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Do these bools need to be replicated so that the server also knows if the gun is able to shoot

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Or will it know as long as the client knows?

bitter oriole Jul 23, 2018, 11:19 AM

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@unique thunder Well, the server should know everything related to gameplay

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If it's able to infer everything from the state, replicate only the state

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If it's not, then replicate the needed vars too

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Basically default to not replicating, and try replicating the root information rather than stuff you update based on it

unique thunder Jul 23, 2018, 11:25 AM

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@bitter oriole Great, thanks.

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I just got into networking, I've had this weird issue

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For hours now where I spawn an item and it spawns correctly on the server but 2 versions of it spawn on the client

bitter oriole Jul 23, 2018, 11:26 AM

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Sounds like it's replicated and you manually spawn it on the client too

unique thunder Jul 23, 2018, 11:26 AM

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well yeah, the actor itself is replicated and I spawn it once without any extra steps

bitter oriole Jul 23, 2018, 11:26 AM

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Replicated actors are also spawned automatically on clients

unique thunder Jul 23, 2018, 11:26 AM

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hmm

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so I should be executing the spawn event on server only

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I think i did try that

bitter oriole Jul 23, 2018, 11:27 AM

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Yes, that's how you should be doing it

unique thunder Jul 23, 2018, 11:27 AM

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1 sec

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something weird happens in that scenario

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📎 unknown.png

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after it's spawned, inside the actor I have an event that triggers and allows me to "grab" the item immediately

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but this method leaves the item floating in mid air

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the actor itself is replicated but the event "Detach" is not replicated in any extra way

bitter oriole Jul 23, 2018, 11:30 AM

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Dunno if attachment is replicated.

summer nova Jul 23, 2018, 7:28 PM

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@unique thunder you are probaably spawning both on client and server

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thus why you get both

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only the server can spawn replicated objects

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if a client spawns something then thats local

haughty carbon Jul 24, 2018, 4:23 AM

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Hello. I am trying to make a Game of 32 players per session and Hosted on a Dedicated Server. But confused about what will happen when more players try to play the game at a Time. Can someone guide me with this?

fringe dove Jul 24, 2018, 4:57 AM

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Hey guys, I found a problem with steam lobbies and invites in 4.20:

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https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1502911-unreal-engine-4-20-released?p=1505904#post1505904

Unreal Engine Forums

https://dnnrz1gqa.blob.core.windows.net/portals/0/Images/Builds/4_20/420_Banner_03.jpg?sv=2017-04-17&sr=b&si=DNNFileManagerPolicy&sig=65Ku%2F%2BtbFyYdF1K

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As a workaround I'm changing ENGINE_NET_VERSION, but I'd like to know the right way to change COMPATIBLE_CHANGELIST instead

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where is that supposed to be set? seems to come in from build configuration somewhere

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I'd ultimately like it to be based on my subversion revision but can do manual changes for now if I know the right place to set it

fiery dome Jul 24, 2018, 5:40 AM

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What's the best plavce to set the player name?

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Begin Play? On server connect?

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Initplayerstate?

winter zenith Jul 24, 2018, 6:29 AM

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InitNewPlayer in GameModeBase attempts to pull the name out of passed in options in your connection string, you should be able to just set ?Name=Bob and have the connecting player's PlayerState have the PlayerName set as Bob

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though I'm not sure if that's changed with 4.20, certainly fine on 4.19.2

haughty carbon Jul 24, 2018, 7:01 AM

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PlayerState is the best place

twin juniper Jul 24, 2018, 7:57 AM

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My game crashes when I call Super::SetMoveFor in my own CharacterMovementComponent ONLY when a client joins a listen server. Dedicated and single player work fine. Anyone know how I can fix this? I'm following this guide: https://wiki.unrealengine.com/Authoritative_Networked_Character_Movement
just the first part (initial setup) does what I'm having issues with; once you override SetMoveFor and call Super in its definition everything crashes (the moment the client joins).

Authoritative Networked Character Movement

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here's the crash log: https://pastebin.com/qPijKvzi

Pastebin

Log file open, 07/24/18 03:10:40 LogWindows: Failed to load 'aqPr...

vagrant falcon Jul 24, 2018, 8:33 AM

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hi, how can i check on server owner of playerstate (to which player controller it bound)

winged badger Jul 24, 2018, 8:34 AM

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from PC reference?

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just access PlayerState

vagrant falcon Jul 24, 2018, 8:35 AM

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oh

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yeah

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lol

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thx

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but value from player state doesnt replicate to server

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if i call it in runtime and change value from client controller -> player state then fine, but if i call result from controller client ask server then its not set

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value is set to being replicated

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variable*

vagrant falcon Jul 24, 2018, 9:19 AM

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ref doesnt help. i guess its reffering to local player state

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how can i get exact player id for player array from get game state

vagrant falcon Jul 24, 2018, 9:43 AM

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nbm i got it

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nvm*

hybrid cypress Jul 24, 2018, 12:05 PM

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Given a dedicated server game with the intent of allowing multiple clients connecting on one machine for testing purposes, does the blueprint node “Get Player Character at index 0” no longer make sense? Like isn’t tour first client index 0 and your second client index 1? And if this is the case, anyone have a suggested replacement for getting the owning player character for the present ue4 game instance?

thin stratus Jul 24, 2018, 12:31 PM

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The Index is not for online games

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It's for local Characters and Controllers

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Online you can only use Index 0

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Which refers the Character/Controller of the Player you are currently on

slim holly Jul 24, 2018, 1:08 PM

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(^ logic needs to work with all controllers)

hybrid cypress Jul 24, 2018, 1:14 PM

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Ah ok thanks!

drifting plank Jul 24, 2018, 4:40 PM

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Hello ! My friend has an issue with his actor component which he want replicated.
He has set it as replicated, netAdressable. Then he have added the Uproperty (Replicated with a ReplicatedUsing and his function) to the variable that need to be replicated. and finally the function GetLifetimeReplicatedProps to set the variable replicated.
The issue is that when the player left the network culling radius then he back into, his variable are absolutely not replicated. :(

I've already done that on an actor component but it was only for an owner only variable. It isn't concerned by relevancy.

Thanks in advance for your help !

elder crypt Jul 24, 2018, 4:46 PM

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I have the advanced sessions plugin for connecting to steam servers and all of the sudden clients can't find servers

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It's really odd because it's happened out of the blue

drifting plank Jul 24, 2018, 4:51 PM

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Oh we found the solution.

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The begin play is called each time that a character reappears and we override the replicated variable.

mild geyser Jul 24, 2018, 5:01 PM

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Is there a way to persis gamemode properites across multiple levels?

tawny parcel Jul 24, 2018, 5:10 PM

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@mild geyser Before the level change you have to save those properties in gameinstance, than load them on map load

mild geyser Jul 24, 2018, 5:11 PM

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Does game instance exist on both server and client?

tawny parcel Jul 24, 2018, 5:14 PM

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They both have their own individual gameinstance, they both exist but are completely separate and not replicated in anyway

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Even though they are the same blueprint

mild geyser Jul 24, 2018, 5:14 PM

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But it's enough if I save the data in the server game instance and load it from there?

tawny parcel Jul 24, 2018, 5:15 PM

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yeap

mild geyser Jul 24, 2018, 5:15 PM

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Ok, gonna try that. Thank you.

plain oriole Jul 24, 2018, 11:06 PM

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Can anyone please tell me how I would replicate a hud

fiery dome Jul 24, 2018, 11:15 PM

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You're gonna have to be more specific? What are you trying to replicate? individual values?

winter zenith Jul 25, 2018, 12:19 AM

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@plain oriole aye, usually you wouldn't actually want to replicate the HUD itself, but have your hud/widget display the values of things you've already got replicated

plain oriole Jul 25, 2018, 12:23 AM

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@winter zenith right now all I have is a simple compass but I’m planning on adding more like a health stamina hunger and thirst bar and also display current time and temperature so would I have to replicate each individually?

graceful cave Jul 25, 2018, 12:25 AM

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if you set the variables to replicate, and have the server set them in the gamestate or playerstate, clients will automatically get the data

winter zenith Jul 25, 2018, 12:26 AM

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^ that. Those variables you speak able are important to the playing of the game aside from just the HUD. You'll want to work out if they are things which are applicable to everyone at the game level (GameState) or specific to individual players, such as Health (PlayerState) and replicate them in there. Then locally your local player's HUD can look the current GameState or their PlayerState and display the values based off of that.

shut gyro Jul 25, 2018, 4:09 AM

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Hey guys, how would one convert a SteamID to the 64-bit version? I get the steam3ID using CSteamID, but can't seem to get the 64-bit to store to a database - even using a 64-bit function available in the CSteamID struct.

unique thunder Jul 25, 2018, 4:36 AM

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📎 unknown.png

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I'm executing a multicast event and inside that event, I'm executing a function

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But that function keeps throwing a pending kill error because I try to destroy the actor it references right after

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Shouldn't this work since the multicast is triggered before the destroy?

winter zenith Jul 25, 2018, 5:15 AM

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Is that pending kill error coming up on the clients when they're trying to execute?

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as calling that multicast won't have the multicast functions run right away, but instruct the clients to run them

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and then destroy actor will also instruct clients that: hey, this actor is getting destroyed

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possibly both of those instructions will come bundled in from the server at the same time (or even out of order), I'm not 100% on this but that's the general feeling I get of this issue

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can you hold off destroying the actor right away so that the client's do not have the actors marked as being destroyed while this callback is running?

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or for a quick test/hack rather than calling destroy actor call set lifetime and have the actor expire after one second (which in turn will destroy)

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set life span*

unique thunder Jul 25, 2018, 5:22 AM

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@winter zenith Delaying the destroy would fix the issue, yes - but this event is responsible for a weapon's magazine insert. Any noticeable delay would be unintuitive and a short, unnoticeable delay seems like a cheat and like there's the right method I'm not seeing.

Here's how the sequence plays out:

Trigger Event (Run on Server) > Multicast Event (Uses Reference) > Destroy Reference, all in one tick.

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Looks like a 0.1 second delay still shows a pending kill

winter zenith Jul 25, 2018, 5:26 AM

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ok, though a larger delay is happy?

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I wonder if something like - 1 second delay, but as part as the callback on the client you call set actor hidden

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possibly that with a short delay that both the RPC and the destroy get sent out at the same time pending on the net priority of the actor

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but for sure, using a long delay is certainly a hack

unique thunder Jul 25, 2018, 5:28 AM

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The only reason I'm even having this issue

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Is because I'm trying to use a 'set visibility' node

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As far as I know and have been told, a Multicast is necessary for this to replicate properly

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The rest of the event Runs on Server and works fine until I try to cue a separate multicast in the middle

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Maybe if I set up yet another event just for the destroy it'll run it in the right order ..

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nope

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I didn't want to have to do this but I'll just set up an extra variable to temporarily hold the ammo count and then use it locally later

twin juniper Jul 25, 2018, 7:09 AM

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@unique thunder i have a ton of temp vars thru my code too 😛

worn nymph Jul 25, 2018, 8:08 AM

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@unique thunder move the destroy actor code to the end of the multicast chain
whats happening is client or server is running the code multicasts then destroys almost instant before anything has had time to propogate so by the time the other clients process the multicast the object they need to access is already pending kill

another thing you could do is set the actor hidden and rather than destroying straight away use the set actor lifespan which will destroy it after x amount of time so you could set it to be equal to the reload animation time for example

also multicasts are not always the best option it is situational. in this use case its the better option but a lot of time for setting visibility and a lot of other multiplayer stuff its a better option to use OnRep function rather than multicast because it will still be executed by all the client but it will also work even if players leave and join again or become net relevant again

for example you have 2 connected clients. one client opens a door you multicast it. only those two clients would get the multicast and open the door.

now a third client joins and walks into net relevancy range of the door. to him its still shut he never recieved the multicast. if howether you had used OnRep he would also see the door as open

http://api.unrealengine.com/INT/BlueprintAPI/Utilities/SetLifeSpan/

Set Life Span

worn nymph Jul 25, 2018, 9:17 AM

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@shut gyro
not at my computer but something like this should work

uint64 Return = SteamID.CSteamID::ConvertToUint64(); //Return ID as String if Found
 return FString::FromInt(Return); } ```

late violet Jul 25, 2018, 9:20 AM

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Anyone know how I would update something on the client pawn when the PlayerState changes? Currently, it only updates the pawn for that client's pawn, and I can't see the change on the other clients. I set the data for the PlayerState on the server and it replicates nicely to the clients. I currently get the controlled pawn from the PlayerController, which would be null for other clients.

junior tree Jul 25, 2018, 10:35 AM

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by any chance is there any sample / downloadable project of a simple multiplayer game with guns, aiming, different crosshair and such that is BP only? (ShooterGame is mostly cpp)

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even if guns don't look great, the effects are silly and so on

twin juniper Jul 25, 2018, 10:37 AM

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not from what i've seen....well at least that is free

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so im trying to make a spawn thingy when a button is pressed but it only works for the "server" editor window, just wondering if im doing something wrong here 🤔
https://i.gyazo.com/2a732f1b401f441ec8f0129d392217c7.png

junior tree Jul 25, 2018, 10:39 AM

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in what was it does not work well?

twin juniper Jul 25, 2018, 10:40 AM

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the "only working for the server editor window" part

junior tree Jul 25, 2018, 10:40 AM

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okay, so the code runs on the server but it's not replicated to the clients, correct?

twin juniper Jul 25, 2018, 10:41 AM

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the client doesn't replicate to the server when its run on the "client 1 viewport"

junior tree Jul 25, 2018, 10:42 AM

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okay, so you perform the action and it's not done in the client but ALSO not done in the server

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while if you do it in the "listen server" (aka server editor window) it works for both client and server

twin juniper Jul 25, 2018, 10:42 AM

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ooo good point

junior tree Jul 25, 2018, 10:43 AM

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from my experience, "call on server" events don't work on all kinds of actor. Player controller can run events on server from client, but if you just create an actor and create an event "run on server" it does not work even if it's replicated. At least it did not work for me

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I was making no point, I was just figuring out the issue

slim holly Jul 25, 2018, 11:50 AM

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ye, only owner controller exists on client

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only server has access to all controllers

twin juniper Jul 25, 2018, 1:54 PM

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👉 😎 👉

vagrant falcon Jul 25, 2018, 3:54 PM

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is using navmesh for ai performance heavy ? need for open world multiplayer game

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if yes what tips can you give me for making navigation without navmesh, i dont even know what to google 😦

chrome bay Jul 25, 2018, 4:31 PM

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If you don't want to use Navmesh, you have to write your own pathfinding.

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In open world, you'll most likely have to generate navmesh at runtime. UE has support for this, but you have to budget for it

vagrant falcon Jul 25, 2018, 4:55 PM

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@chrome bay 16k x 16k map i guess its too big for navmesh, how long will it take to generate nav mesh on runtime. Also has it any affect on world composition ?

rose egret Jul 25, 2018, 5:08 PM

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how do I send secure command to my master server to execute a server instance after match making? I am using steam.

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currently I use TCP and my own RPC. but the problem is a hacker or someone else with a little skill will send packet and destroy my servers

vagrant falcon Jul 25, 2018, 5:14 PM

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@chrome bay will invoker save situation ?

chrome bay Jul 25, 2018, 5:14 PM

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Last I checked world composition doesn't work in multiplayer anyway, but that might be fixed now

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And yeah, that's what's used to generated navmesh at runtime

vagrant falcon Jul 25, 2018, 5:16 PM

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world composition is working fine in multiplayer also

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@rose egret encode packet with something

rose egret Jul 25, 2018, 5:19 PM

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that way client will have access to key 😐

vagrant falcon Jul 25, 2018, 5:20 PM

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fuck

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sry no other words

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will face this issue soon also

next falcon Jul 25, 2018, 8:39 PM

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Does Someone has a hint for me how i can create like a multiverse?
Like in minecraft with diffrent Maps and players at the same time in it?

fringe dove Jul 25, 2018, 8:39 PM

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is there a way to get a callback when a checkpoint for a demo replay rewind is happening?

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seems you can override:
https://api.unrealengine.com/INT/API/Runtime/Engine/Engine/UDemoNetDriver/NotifyGotoTimeFinished/index.html

UDemoNetDriver::NotifyGotoTimeFinished

Called when a

#

or better:

DECLARE_DELEGATE_OneParam(FOnGotoTimeDelegate, const bool /* bWasSuccessful */);```

tawny parcel Jul 25, 2018, 10:57 PM

#

Run on server trace DEBUG is not showing up when dedicated server is checked for PIE settings. Is there anyway to show this?

cold sparrow Jul 26, 2018, 2:16 AM

#

how come I'm getting "The match you are trying to join is running an incompatible version of the game" when I test multiplayer via launching editor as a dedicated server and then as a client?
I use this example: https://wiki.unrealengine.com/How_To_Test_Dedicated_Server_Games_Via_Commandline

How To Test Dedicated Server Games Via Commandline

#

Editor: 4.20

#

I tested it last time like that like back to 4.17 and it worked...

#

has anything changed? If I run inside the editor (2 players, dedicated server) it plays fine. But if on one of the clients I say open 127.0.0.1 (or my actual IP) -> I also get The match you are trying to join is running an incompatible version of the game

tawny parcel Jul 26, 2018, 2:52 AM

#

@cold sparrow Are you connecting two different projects? Or you may need to make sure you have compiled properly

#

Or are you using a previous (4.17) build and trying to connect to your new 4.20 of some sort

#

Also make sure when you right click on your gamename.uproject file -> choose unreal engine version is the correct one

cold sparrow Jul 26, 2018, 2:59 AM

#

no it is all the same project, same directory

#

and the same engine

#

server -> "C:\Program Files\Epic Games\UE_4.20\Engine\Binaries\Win64\UE4Editor.exe" "d:\Unreal\MultiplayerTest.uproject" Voxel -server -log -nosteam

#

client -> "C:\Program Files\Epic Games\UE_4.20\Engine\Binaries\Win64\UE4Editor.exe" "d:\Unreal\MultiplayerTest.uproject" 192.168.1.244 -game -log -nosteam

#

192.168.1.244 is my IP, and I see that address in a server log

raven holly Jul 26, 2018, 4:17 AM

#

did you do the build at the same time?

#

oh this is editor

#

run the server after the client

#

start your 2 clients, then run the server

cold sparrow Jul 26, 2018, 4:19 AM

#

did not work. The same errors in a loop

raven holly Jul 26, 2018, 4:20 AM

#

have a pic of the error?

#

connect to localhost

#

or 127.0.0.1

cold sparrow Jul 26, 2018, 4:22 AM

#

📎 unknown.png

#

changed all to 127.0.0.1 - same error

raven holly Jul 26, 2018, 4:24 AM

#

do you have a game version specified in the project settings?

#

📎 unknown.png

cold sparrow Jul 26, 2018, 4:25 AM

#

1.0.0.0

raven holly Jul 26, 2018, 4:25 AM

#

client -> "C:\Program Files\Epic Games\UE_4.20\Engine\Binaries\Win64\UE4Editor.exe" "d:\Unreal\MultiplayerTest.uproject" -game -log -nosteam

#

try that

#

and then use console to open 127.0.0.1

#

is your project 4.20 ?

cold sparrow Jul 26, 2018, 4:58 AM

#

4.20

#

trying without IP

#

the same problem

unique thunder Jul 26, 2018, 7:56 AM

#

@cold sparrow are you using gamelift by any chance

#

I ran into this same error with it

#

a while ago

rose egret Jul 26, 2018, 8:23 AM

#

has anyone here worked with steam server api?

dark wren Jul 26, 2018, 9:47 AM

#

Hello there!I have a problem.When i drop static mesh to the map and activate replication, everything is good, and the mesh replicates(movement) but if i do this with blueprint( add blueprint class--> actor) and our actor is static mesh(replication, movement replication are active, mesh won't replicates in clinet and in server i see different mesh movement, if you need i can attach video with this problem, pls help)

mild geyser Jul 26, 2018, 11:29 AM

#

Has TMap replication support been already added?

unique thunder Jul 26, 2018, 12:48 PM

#

📎 unknown.png

#

I know I need to 'Replicate' an ammo count for example

#

But do I also need to replicate this?

#

📎 unknown.png

#

Scenario: Bool is checked, if yes > can shoot. If shot > decrease ammo.

winged badger Jul 26, 2018, 12:51 PM

#

not if you automatically drop the mag when its empty

#

then if ammo > 0 shoot & decrease ammo

#

if you can have an empty mag sticking out of your rifle though, keeping visual states synced might require it

unique thunder Jul 26, 2018, 12:52 PM

#

it's VR, the mag stays in the gun until you remove it manually

#

so I'm a bit confused

#

📎 unknown.png

#

this 'Loaded' bool is set to true when a reload is complete with ammo >= 1

#

does it have to be set to 'replicated' so that the server & other clients know this player CAN shoot

#

so that when he does, the server also gets a True from the bool

winged badger Jul 26, 2018, 12:54 PM

#

that loaded doesn't know the difference between just completed a reload and reloaded 5 minutes ago, but still have half a mag left?

unique thunder Jul 26, 2018, 12:56 PM

#

I'm setting the bool to true or false via events that are already being executed on the server

#

Does that mean the server already knows it's True even if the variable isn't set to 'Replicated'?

winged badger Jul 26, 2018, 12:57 PM

#

you could just use the variable IsReloading

#

and then bool CanShoot() const { return !IsReloading && Ammo > 0; }

#

you get more information for the same bandwidth

unique thunder Jul 26, 2018, 12:58 PM

#

gets a bit tricky, a player can re-use a half-empty or fully emptied magazine if they chose to, it just wouldn't work

winged badger Jul 26, 2018, 12:59 PM

#

the ammo count should sync up anyways

unique thunder Jul 26, 2018, 12:59 PM

#

ive learned how to replicate events but variable replication seems really abstract

#

like if my ammo float isn't replicated but I can check locally if ammo >=1, then trigger a replicated "Shoot" event

#

the variable would never have had to be set to Replicated at all

#

in theory

#

so now I'm like -- what's the point? and which variables don't need to be set to Replicated?

winged badger Jul 26, 2018, 1:00 PM

#

the ammo on client is just informative

#

to display to the player how much ammo he has

#

server has to check for the ammo count itself

#

otherwise a 8 y/o with cheat engine can setup a script in 5 minutes that will let him fire forever, ammo or not

unique thunder Jul 26, 2018, 1:01 PM

#

if the server is checking variables to make sure the mechanics are replicated properly, would you set all variables relevant to weapon mechanics to Replicated? and if so, which variables would you not set to Replicated?

winged badger Jul 26, 2018, 1:01 PM

#

i go with the following:

#

i trigger a local and a server event at the same time

#

i don't want the player to wait for round trip of network latency to see if his game is responding to commands

#

if the ammo count is out of sync, it can happen that client sees himself firing while server doesn't fire

#

but that is your worst case scenario, and its not likely to happen frequently

#

you need to replicate all information required to present the player with current state of the world around him

#

and all information required to keep visual states in sync

#

wouldn't do great if client 1 ejected his empty mag, but client 2 still sees it stuck in his rifle

#

although the ability of client 1 to fire is the same in both cases - he can't

#

him having the clip in the rifle makes a difference between client 2 knowing he can't fire and having no idea if he can fire

summer nova Jul 26, 2018, 1:08 PM

#

@unique thunder nothing like deciding to make an MP PvP game without knowing a lot about MP nor C++

#

you should hire someone to do it and it would be much more effective. A simple MP shooter is not that hard

#

specially if you can go and ripoff shootergame

unique thunder Jul 26, 2018, 1:11 PM

#

eh, good point. A bit ambitious. Most of it already works, tbh. Ded servers, IK, guns, the map

#

I just don't wanna over-do it on bandwidth by replicating variables everywhere that would work with replication not enabled

summer nova Jul 26, 2018, 1:13 PM

#

have you ran the game trhough the bandwidth debugger?

#

to see how much bandwidth you actually use

#

wich ims SURE its less than fortnite

#

how many players will you run in 1 server?

unique thunder Jul 26, 2018, 1:17 PM

#

20-30 capacity

summer nova Jul 26, 2018, 1:17 PM

#

being dedicated, bandwith its really not that bad of an issue

#

wow

unique thunder Jul 26, 2018, 1:17 PM

#

I've run some tests but not with enough people yet

summer nova Jul 26, 2018, 1:17 PM

#

ok then thats a lot

#

use bots @unique thunder

unique thunder Jul 26, 2018, 1:17 PM

#

im gonna get a nice AWS package but still.

#

bots won't be good in tactical situations, they'll prob just endanger the squad

summer nova Jul 26, 2018, 1:17 PM

#

and?

unique thunder Jul 26, 2018, 1:17 PM

#

I do have some offline/co-op options with bots planned though

summer nova Jul 26, 2018, 1:17 PM

#

as long as they move around and shoot they are good

#

real nice for testing

cold sparrow Jul 26, 2018, 2:13 PM

#

hi, @unique thunder , no Ido not use gamelift

#

Can someone confirm that in 4.20 is works or does not: https://wiki.unrealengine.com/How_To_Test_Dedicated_Server_Games_Via_Commandline
because for me a client cannot connect to the dedicated server running like that. It does work though inside the editor and in the shipping build.

How To Test Dedicated Server Games Via Commandline

gaunt crown Jul 26, 2018, 2:47 PM

#

how do I make only Physics happen on client and on Event Tick, the Client sends the Location of the Actor from Physics to Server,

#

But right now, the Actor bobs everywhere and is glitchy looking

#

https://gyazo.com/ae1230c874281fc2303722cc23e8af3a

Gyazo

▶ Play video

#

as you can see, the ball that isn't moving, is glitchy while every tick, the client sends its location.

#

Currently its physics are disabled on Server so the Client can have a smooth transform locally.

#

https://cdn.discordapp.com/attachments/221798862938046464/467409508264706059/unknown.png

#

https://cdn.discordapp.com/attachments/221798862938046464/467409600417759232/unknown.png

worthy wasp Jul 26, 2018, 2:53 PM

#

@gaunt crown - https://forums.unrealengine.com/development-discussion/c-gameplay-programming/9962-video-player-controlled-replicating-physics-movement-simulating-physics?17078-Video-Player-Controlled-Replicating-Physics-Movement-Simulating-Physics=

Unreal Engine Forums

For gameplay programmers writing C++ code.

unborn nimbus Jul 26, 2018, 5:12 PM

#

Any idea why my dynamically added component is not replicating?

cerulean hamlet Jul 26, 2018, 5:20 PM

#

Can someone tell me if this is the proper use of TearOff

#

Player kills enemy, I want to delete the enemy on the server but keep the ragdoll on the client, so I tearoff

dark wren Jul 26, 2018, 5:38 PM

#

Hello there!I have a problem.When i drop static mesh to the map and activate replication, everything is good, and the mesh replicates(movement) but if i do this with blueprint( add blueprint class--> actor) and our actor is static mesh(replication, movement replication are active, mesh won't replicates in clinet and in server i see different mesh movement, if you need i can attach video with this problem, pls help)

worthy wasp Jul 26, 2018, 6:18 PM

#

@dark wren - you're using function SpawnActor() in blueprint correct?

#

@unborn nimbus - is your DynamicallyAddedComponent set to bReplicates = true; ?

unborn nimbus Jul 26, 2018, 6:19 PM

#

I had it set to SetIsReplicated(true) in the constructor

worthy wasp Jul 26, 2018, 6:21 PM

#

why not just check the box in the details panel on the component's details:

http://puu.sh/B3ynP/73f7e7b0ab.png

unborn nimbus Jul 26, 2018, 6:21 PM

#

because it's being done in c++

worthy wasp Jul 26, 2018, 6:21 PM

#

fair enough!

unborn nimbus Jul 26, 2018, 6:21 PM

#

haha

worthy wasp Jul 26, 2018, 6:21 PM

#

so INSIDE of the details panel IN EDITOR....

#

does this same box above show TRUE?

#

when you select the component that is

#

also

#

do you have Replicated variables

#

and have you included the necessary header files to properly setup replication

unborn nimbus Jul 26, 2018, 6:22 PM

#

no, I just need to call RPC's

worthy wasp Jul 26, 2018, 6:22 PM

#

#include "UnrealNetwork.h"

#

required for any replication to happen

unborn nimbus Jul 26, 2018, 6:23 PM

#

it replicates fine if I create it in the constructor but if I try to add it dynamically later, it doesn't

worthy wasp Jul 26, 2018, 6:23 PM

#

including RPC's

#

hmmmm

#

are you ACTIVATING The component when you add it dynamically?

#

i believe that its unactivated unless you set bAutoActivates to true

unborn nimbus Jul 26, 2018, 6:23 PM

#

I believe that defaults to true

#

yea it is

worthy wasp Jul 26, 2018, 6:24 PM

#

i do apologize... the correct function is NewComponent->RegisterComponent();

unborn nimbus Jul 26, 2018, 6:25 PM

#

yea I'm calling that

worthy wasp Jul 26, 2018, 6:25 PM

#

ok

#

when you say its not replicating....

#

does the LOCAL client see it - but other clients dont?

unborn nimbus Jul 26, 2018, 6:25 PM

#

no, it only exists on the server

worthy wasp Jul 26, 2018, 6:25 PM

#

ok i'm going to go into a theory at this point....

#

Server adds the component - and server registers the component.

#

i have found tha treplication documentation is a bit cumbersome to understand and a bit false in the way its portrayed to the reader.....

#

in my OWN EXPERIENCES....

#

proper RPC chains to get it to show to networked clients require CREATION from the server....

#

and a NETMULTICAST RPC to equally put it to each networked client

#

i'll be honest - MANY people will fight me on this topic.

#

but its the only way i can successfully pull this off.

unborn nimbus Jul 26, 2018, 6:27 PM

#

but then it wouldn't be replicated, it's just one on the server and local copies on clients

worthy wasp Jul 26, 2018, 6:27 PM

#

and have proper replication chain of events going to networked clients.

#

that is not true.

#

try this - add a tick debug string ont he component.....

#

have it say HELLO

#

if its properly replicated - EVERY SCREEN of your clients that youre in PIE will say "hello"

#

if not - only your server will see it

#

now - do your RPC events like we talked about

#

tehw ay you have it now - with server... only the server client will say "Hello"

#

the others wont

#

try my method

unborn nimbus Jul 26, 2018, 6:28 PM

#

no, even if they are just local copies, it would still print hello

worthy wasp Jul 26, 2018, 6:29 PM

#

ok man - i'll take your word

#

good luck!

unborn nimbus Jul 26, 2018, 6:29 PM

#

thanks

dark wren Jul 26, 2018, 7:46 PM

#

@worthy wasp no it is default mesh

hoary lark Jul 26, 2018, 8:07 PM

#

does anyone here launch uncooked server/client instances for testing, per https://wiki.unrealengine.com/How_To_Test_Dedicated_Server_Games_Via_Commandline? no matter what I try, the client just times out without connecting, wondering if there's some more up to date info I need

#

oh. nevermind, I just had to actually bother other people before discovering I simply needed to set my game default map settings in the project. facepalm

dusty halo Jul 26, 2018, 9:01 PM

#

Anyone has an idea, how to make something like these? Idea is, that red players can go trough, but blue ones can't

#

📎 wall-shield-3d-model-c4d.png

#

https://gyazo.com/13edb2ba151fd7859f8a8860c8c81ace

Gyazo

#

https://gyazo.com/2fd4004925e97f241befd68eb5ffdc13

Gyazo

#

My attempts

#

But problem starts if red and blue players stands next to wall

#

together

#

@thin stratus Maybe you have any idea?

gleaming vector Jul 26, 2018, 9:04 PM

#

use a collision filter

dusty halo Jul 26, 2018, 9:16 PM

#

@gleaming vector like making new collision channels?

gleaming vector Jul 26, 2018, 9:16 PM

#

no

#

there is a thing called a collision filter

#

sorry

#

Collision Mask

dusty halo Jul 26, 2018, 9:23 PM

#

@gleaming vector where can i find it and how it works?

#

Google don't give me answers 😂

gleaming vector Jul 26, 2018, 9:25 PM

#

take a look at FMaskFilter and SetMoveIgnoreMask in PrimitiveComponent

#

I have not used it before

ancient pebble Jul 26, 2018, 10:28 PM

#

I have a problem with the Find Sessions blueprint node using Steam. If I have a session already running, the other player can find and join it consistently. However, if there's no current session, it never executes the On Failure output so my logic that should run when failing to find a session is not running.

severe widget Jul 26, 2018, 10:31 PM

#

The default sessions stuff?

ancient pebble Jul 26, 2018, 10:32 PM

#

Yeah, using Spacewar.

severe widget Jul 26, 2018, 10:32 PM

#

I think most BP people just use advanced sessions - fixes a lot of stuff OSSSteam leaves on the floor.

#

or something.

ancient pebble Jul 26, 2018, 10:32 PM

#

I can see in the logs that it's searching and failing to find matching sessions.

#

It just never hits the On Failure output. 😦

#

Even though I can see it's failing.

severe widget Jul 26, 2018, 10:33 PM

#

Yeah most likely just an oversight.

#

Outside of doing a custom engine to directly call that output, or using a plugin to work around it, I'm not sure what you can do.

ancient pebble Jul 26, 2018, 10:33 PM

#

I see.

#

Maybe worth noting: if I unplug from the PlayerController input in the Find Sessions node and leave it default, OnFailure does execute, but then On Success never works.

severe widget Jul 26, 2018, 10:35 PM

#

¯_(ツ)_/¯

ancient pebble Jul 26, 2018, 10:35 PM

#

https://giphy.com/gifs/robert-downey-jr-sigh-confused-116a8zosxwA0SI

Giphy

#

Nothing more frustrating than an error with no leads. 😕

severe widget Jul 26, 2018, 10:38 PM

#

What you might do is a time r which success cancels

#

though, you'd want the search to be explicitly aborted then, not sure if you can.

ancient pebble Jul 26, 2018, 10:41 PM

#

I don't think so. At least I don't know of a way to cancel a search.

#

There's no session node for it.

winged badger Jul 26, 2018, 10:49 PM

#

advanced sessions is a good choice for this

#

they do expose all the basic functionality to BP

lean hornet Jul 26, 2018, 10:54 PM

#

so i ran into a issue trying to make a character move with the vehicle. Any ideas what im doing wrong ?

📎 1.PNG

#

📎 2.PNG

#

other then that the position after detaching is completly wrong and generally im not sure what im doing wrong. My goal is to attach the actor to the car so he can still use his actions inside the vehicle aiming aso aso

elder crypt Jul 26, 2018, 10:56 PM

#

Is advanced sessions not working for anybody else? I'm getting this error and I have no idea how to fix it :( https://gyazo.com/f6558f21b83d711f386bac4554b5b279

Gyazo

#

It says something about not finding a part of the path but I don't know what to do about it

winged badger Jul 26, 2018, 10:56 PM

#

looks like you didn't compile them

elder crypt Jul 26, 2018, 10:57 PM

#

How would I do that?

#

I'm using just blueprints also

winged badger Jul 26, 2018, 10:57 PM

#

add any c++ class to your im assuming BP only project

elder crypt Jul 26, 2018, 10:57 PM

#

Yeah

winged badger Jul 26, 2018, 10:57 PM

#

and hit compile

#

VS required

#

altho you do not have to actually start it

elder crypt Jul 26, 2018, 10:58 PM

#

Okay

#

I have Visual studio installed

#

and the c++ libraries

#

I'll try that right now

lean hornet Jul 26, 2018, 10:59 PM

#

Open visual studio and right click on the project and compile

winged badger Jul 26, 2018, 10:59 PM

#

not sure that works with BP only

#

i've never tried without c++

#

thats what i told him, only the compile button in editor should also light up

#

when he adds it

elder crypt Jul 26, 2018, 11:02 PM

#

is an empty c++ class fine?

winged badger Jul 26, 2018, 11:02 PM

#

should be

#

im not sure child actor components are meant to be used that way @lean hornet

lean hornet Jul 26, 2018, 11:04 PM

#

What would be another way to attach a player to the vehicle ?

winged badger Jul 26, 2018, 11:04 PM

#

try attaching it to any primitive component on the car directly

elder crypt Jul 26, 2018, 11:04 PM

#

I'm at this point now

📎 4ffebe268efa4f9d4f502a617397fc89.png

lean hornet Jul 27, 2018, 1:39 AM

#

@elder crypt its a visual studio issue did you install 8.1 windows ?

lean hornet Jul 27, 2018, 1:55 AM

#

@elder crypt

📎 unknown.png

sly kernel Jul 27, 2018, 2:50 AM

#

is there a decent tutorial available for a basic multiplayer top down twin stick shooter (no C++, Blueprints only) ?

dusty sleet Jul 27, 2018, 5:54 AM

#

@ancient pebble if youre still around... not 100% sure but the on failure doesn't indicate a session not found.. it indicates the find function itself didnt run. even if no sessions are found it returns a success because the command fully ran but just didnt find anything. You'd need to output the sessions array and make sure its empty to get a real "failed to find session"

ancient pebble Jul 27, 2018, 6:11 AM

#

@dusty sleet Oh! Thanks for the tip. I never would’ve guessed that on my own.

next falcon Jul 27, 2018, 6:46 AM

#

What happens if like 20 guys call a function every tick replicated to server?
How does the server handles it?
Does it just get slower? does it only like every 3. attempt ?

winged badger Jul 27, 2018, 6:49 AM

#

to server is usually a little less taxing then from server

#

as its upload is the thing that gets the most stress

#

and they do that already, ServerMoveTo in CMC and the likes

#

you should still keep it at a minimum, and not set them as Reliable unless you absolutely have to

next falcon Jul 27, 2018, 6:56 AM

#

An example on chunkloading:
If 20 player moves around with a range of 16 chunks in each direction (X,Y,Z) that are 15360+- chunks
and half of them need now to load new chunks (20000) so 20000 calls goes to server... i think thats very bad

Any ideas how i can do that better ?

winged badger Jul 27, 2018, 6:59 AM

#

use streaming levels, do not load chunk by chunk and use net relevancy to figure out when they should be replicating

#

also, if each chunk is an actor... ouch

#

and if you are not using dedicated server, then optimizations to save only client's memory/CPU are kinda pointless

next falcon Jul 27, 2018, 7:06 AM

#

Okay thank ya ill look at streaming levels

#

How many streaming levels i can have in a Level?
Infinite right ?

winged badger Jul 27, 2018, 7:13 AM

#

handling each chunk individually in a network environment is just not practical

#

however you set it up

next falcon Jul 27, 2018, 7:14 AM

#

i thaught thats how a chunksystem works

winged badger Jul 27, 2018, 7:15 AM

#

you can group them in blocks of 50k or so

#

you can't send a RPC per chunk, it will suffocate your network

next falcon Jul 27, 2018, 7:17 AM

#

but if they are grouped in 50k chunks and i wanna update only one ? than i need to update all of them or what ?

winged badger Jul 27, 2018, 7:22 AM

#

unreal will replicate only stuff that changes

#

on the server

#

if your player is doing something to affect a chunk directly, then sure, RPC is appropriate

#

but keeping only what a client can see loaded, and pushing everything else over network constantly, that won't perform well

next falcon Jul 27, 2018, 7:27 AM

#

Okay ill try a little bit around with streaming level instances

#

I already have problems with it xD

rose egret Jul 27, 2018, 8:15 AM

#

how do I access steam web APIs on c++?

worn nymph Jul 27, 2018, 8:40 AM

#

@next falcon with streamimg levels and map tileing you can also make it so that it uses static meshes from a certain distance to reduce the vertices count as well to improve performance

this tutorial series he is going over this stuff. so might be worth your while watching https://youtu.be/SPZmdTpjlk8

YouTube

SabreDartStudios

Let's make an MMO in UE4 - Part 3 (World Composition)

Link to map tiles needed for this demo: https://drive.google.com/open?id=1b4RO3UCRrorY2vaye5jOlBiLWUkVDnNQ In this session we will be setting up world compos...

▶ Play video

tawny parcel Jul 27, 2018, 8:59 AM

#

For multiplayer AI pathing to work do I need to check client side navigation (nav settings)? Or should it be able to just do the calculations on the server end and than replicate to clients?

#

My AI is working perfectly in editer with dedicated server checked but in a packaged game w/ dedicated server monsters are just standing still at their spawn point

drifting plank Jul 27, 2018, 9:57 AM

#

Hey here :)
I've created a function to retrieve all relevant players of a specific client.
Is there already a function which do that ?

My method is simple :
I pass the client's controller.
I iterate through each connected player controllers (store in my custom gamemode).
I ignore the client controller and I check if the pawn is relevant to the client.

Is that a good approach to do that ?
Thanks for the advices 😃

winged badger Jul 27, 2018, 10:06 AM

#

it is not

#

IsLocalController for controller and IsLocallyControlled for pawn

drifting plank Jul 27, 2018, 10:54 AM

#

Hum and how you handle the relevant players ?

#

I've tried a multicast with your method but I can't check relevancy

#

In my method : In the server, I retrieve all relevant players and I call a clientRPC with the concerned pawn in parameter to each client

winged badger Jul 27, 2018, 12:09 PM

#

you just multicast and let relevancy handle itself

haughty carbon Jul 27, 2018, 12:34 PM

#

Hey. Can someone clear my silly doubts Regarding multiplayer?

When a client creates a new session, he has authority. Is that normal in dedicated server?? I guess only the server has authority

bitter oriole Jul 27, 2018, 12:54 PM

#

Not sure what you mean by session

#

@haughty carbon "sessions" in the context of the online subsystem, for example, are completely removed from authority/replication/etc

haughty carbon Jul 27, 2018, 1:12 PM

#

@bitter oriole From BP on Game Instance I created a New Session with Create Session Node and the Client 1 Has authority.

bitter oriole Jul 27, 2018, 1:12 PM

#

If you create a session, it means you're trying to create a new server

#

Basically

haughty carbon Jul 27, 2018, 1:13 PM

#

Oh. So how can i make the Client act only as client and not give him authority

bitter oriole Jul 27, 2018, 1:14 PM

#

Well, don't create a session on the client

#

This is what you're probably doing right now

manic pine Jul 27, 2018, 1:14 PM

#

join the session instead of creating it

#

authority is really more of a per-Actor thing though

#

a client joined to a server will still have Authority on objects he has created himself

haughty carbon Jul 27, 2018, 1:16 PM

#

Yeah. So a Player Controller is necessary to create a Session and The created controller becomes authority.

Is there any alternative way where server creates server and just player join it.

P.s: New To UE4 Networking.

bitter oriole Jul 27, 2018, 1:16 PM

#

The idea is that your dedicated server should be creating a session

#

Your player should be searching for one, and then joining one

manic pine Jul 27, 2018, 1:18 PM

#

yeah, these are two distinct systems

#

a server will work without a session

bitter oriole Jul 27, 2018, 1:18 PM

#

They are

#

You can also not have sessions at all whatsoever and join servers by IP directly

#

Sessions are basically a way to find games

manic pine Jul 27, 2018, 1:19 PM

#

ye, its more for sharing data that's not necessary related to the gameplay/map

haughty carbon Jul 27, 2018, 1:21 PM

#

Well I want 32 players in a Session and its like matchmaking. So it cannot be a Join by IP i guess.

bitter oriole Jul 27, 2018, 1:21 PM

#

Here's how it works

#

Every UE4 game executable can be dedicated server, client, or listen server (client that also does server)

#

For 32 players, forger about that last one - you have a dedicated server somewhere that you own and 32 players

#

You have two quite separate things to handle : networking, replication, basically your multiplayer support between server and client and sessions

#

Sessions are really just a way to handle matchmaking

#

You should start with direct IP connection to implement multiplayer and get a grip on authority etc

#

Then, once your game does work well in MP - add sessions

haughty carbon Jul 27, 2018, 1:25 PM

#

Understood a little

#

Will try to make it

bitter oriole Jul 27, 2018, 1:26 PM

#

The key thing is, do this step by step

#

You don't really need sessions until you're in testing

#

You can even be in private testing and have three dedicated servers with a known IP address, and three "join server X" buttons

#

The really hard part is implementing the multiplayer gameplay, sessions are just a nice usability layer

sly kernel Jul 27, 2018, 1:29 PM

#

is there a decent tutorial available for a basic multiplayer top down twin stick shooter (no C++, Blueprints only) ? (basic multiplayer is the keyword)

haughty carbon Jul 27, 2018, 1:30 PM

#

Oh. Thanks a lot @bitter oriole @manic pine

sly kernel Jul 27, 2018, 1:39 PM

#

anyone ? :/

finite bison Jul 27, 2018, 3:56 PM

#

@sly kernel have you seen the series by epic here?

#

https://www.youtube.com/watch?v=abmzWUWxy1U

YouTube

Unreal Engine

Blueprint Multiplayer: Project Overview | 01 | v4.11 Tutorial Seri...

In this video we take a look at the finished project and step through each of the features that will be covered in this series. We show our functional Main M...

▶ Play video

#

overview: https://docs.unrealengine.com/en-us/Videos/PLZlv_N0_O1gYqSlbGQVKsRg6fpxWndZqZ/Wi6ZPawtNdE

sly kernel Jul 27, 2018, 4:00 PM

#

Is it the one led by Wes @finite bison ? If so, I've read on the forums that it doesn't work with current UE4

finite bison Jul 27, 2018, 4:01 PM

#

no idea

#

but it should be easy to fix i guess

#

got a link to that forum post? @sly kernel

sly kernel Jul 27, 2018, 4:05 PM

#

don't have it handy, sorry 😦

finite bison Jul 27, 2018, 4:07 PM

#

nvm just curious at what issues would crop up in blueprints of all things

sly kernel Jul 27, 2018, 4:07 PM

#

could be that someone didn't do something correctly or didn't follow through the series properly and then posted it as if the tutorials were flawed.. go figure 😃

finite bison Jul 27, 2018, 4:08 PM

#

yeah

#

maybe a node was renamed or got different inputs/outputs now

sly kernel Jul 27, 2018, 4:09 PM

#

hmm.. Implementing MP looks like a ton of work 😦

sly kernel Jul 27, 2018, 4:25 PM

#

I still can't quite understand why a single-player game can be turn into multiplayer game eventually

#

it seems that a lot of other games out there do exactly that

vale ermine Jul 27, 2018, 4:48 PM

#

Hi. I am currently working on a game that is 2.3D (2D sprites and 3D world). The camera rotates 360 and each actor changes flip book based on camera rotation split into 8 section around the 360. What would be the correct way to implement my flip books for multi-player? Each player would view each actor on screen from a different angle. Would I just add a component to every actor on screen for each player that is only viewable to the actor that added the component then remove the component when the actor walks off screen?

dark wren Jul 27, 2018, 4:54 PM

#

Hello there!I have a problem.When i drop static mesh to the map and activate replication, everything is good, and the mesh replicates(movement) but if i do this with blueprint( add blueprint class--> actor) and our actor is static mesh(replication, movement replication are active, mesh won't replicates in clinet and in server i see different mesh movement, if you need i can attach video with this problem, pls help)

ancient pebble Jul 27, 2018, 5:32 PM

#

@dusty sleet Hey, just wanted to say thanks for the tip last night. You were correct! I set up a branch after On Success to check if the array is empty instead of checking On Failure. Works like a charm now. 😎

next falcon Jul 27, 2018, 5:58 PM

#

How do i load a replicated streaming level?

zinc zealot Jul 27, 2018, 6:14 PM

#

Guys

long wharf Jul 27, 2018, 6:40 PM

#

Hi Guys, I have my multiplayer game all setup and working, Problem being after Server travel the Chat admin Controls stop Working, I have them set up on Event init from Gameintance, Working perfectly on first round than goes to pop after. Do i need to call them a second time?

glossy vessel Jul 27, 2018, 6:56 PM

#

Is there a way to get the SteamPlayerID? FUniqueNetIdRepl UniqueId gives me a nullptr

bitter oriole Jul 27, 2018, 6:57 PM

#

@glossy vessel Well are you running on Steam ?

#

Shipping build ?

#

Etc

glossy vessel Jul 27, 2018, 6:57 PM

#

steam with development build

zinc zealot Jul 27, 2018, 8:46 PM

#

A while ago I came to this chat and a guy gave me a link for something like a book for every basic thing to know for making a multi player game

unique thunder Jul 27, 2018, 9:01 PM

#

I'm running a ded server and audio seems to be replicating even if executed by an event that isn't replicated in any way (inside an actor that is replicated). Is this because the actor itself is replicated? It's using a play sound at location node. When I try to run it through the server and multicast it, I'm hearing the audio play twice.

glossy vessel Jul 27, 2018, 9:04 PM

#

@worn nymph thank you

worn nymph Jul 27, 2018, 9:13 PM

#

a bp function i made
you just pass in the player controller ID from the GetPlayerControllerID node

header file

        bool GetSteamID(int32 PlayerControllerID, FString& PlayerSteamID);

Cpp


bool AUDPSocketMain::GetSteamID(int32 PlayerControllerID, FString& PlayerSteamID)
{
    TSharedPtr<const FUniqueNetId> TempPlayerSteamID = OnlineInterface->GetIdentityInterface()->GetUniquePlayerId(PlayerControllerID);
    PlayerSteamID = TempPlayerSteamID->ToString();
    return true; 
}```

obv dont forget to change the class name from AUDPSocketMain to the class you are using.
doesnt have to be a bool return type either you could just return the ID i wanted the bool return as well for some other code to function

📎 unknown.png

thin stratus Jul 28, 2018, 9:25 AM

#

@worn nymph As far as I am aware, if you play splitscreen with Steam, you all have the same SteamID

#

So passing in the Controller ID and getting the UniquePlayerId from that would give you the same ID for each Local player

#

If you want the actual SteamID of the online players, you should use the PlayerState, as this already has the ID.
You just have to ToString it and return it

winged badger Jul 28, 2018, 12:02 PM

#

Only problem is that the API pulls the SteamID from the steam client running on the local machine

worn nymph Jul 28, 2018, 1:27 PM

#

@thin stratus who said anything about splitscreen. he asked how to get the SteamID which this will do.

thin stratus Jul 28, 2018, 1:27 PM

#

You are using the PlayerController ID

#

You can use your code of course. I only wanted to point out that your code only really works for local controllers. So you cant get the ID of your opponent

worn nymph Jul 28, 2018, 1:45 PM

#

not really sure what you on about. the function asks for a LocalUserNum which is the controller of the player with the steam interface most of the time this is hardcoded to be player controller 0 but i thought it would be nicer to actually pass in the correct controller Id.. so in multiplayer game it will return the steam id of the currently connected logged in player per instance of the game? ive tested this with multiple clients connected to my server and it is always the correct unique steam id for each player as i use it to do my steam authentication log in system

manic pine Jul 28, 2018, 1:47 PM

#

ye, credric just means it wont work on clients since they only have their own PC

worn nymph Jul 28, 2018, 1:48 PM

#

what wont work on clients im confused?

manic pine Jul 28, 2018, 1:49 PM

#

a client cant use your method to get the steam id of another client

worn nymph Jul 28, 2018, 2:04 PM

#

there isnt anything in the steam api or the wrappers from epic that let you do that is there? you can get friends steam IDs there is functions for that.

manic pine Jul 28, 2018, 2:10 PM

#

PlayerState->UniqueId should have it and be replicated to all players

worn nymph Jul 28, 2018, 2:12 PM

#

📎 unknown.png

worn nymph Jul 28, 2018, 2:42 PM

#

is the unique id not exposed to bp? the player id in the player state only returns a number like 256 etc not a steam Id?

#

📎 unknown.png

#

this is whats returned by my function

📎 unknown.png

manic pine Jul 28, 2018, 2:50 PM

#

doesnt look like it or any related functions are bp exposed sadly

#

playerid is something else, yeah

twin juniper Jul 28, 2018, 4:54 PM

#

you have to online option @worn nymph -good!

thin stratus Jul 28, 2018, 4:56 PM

#

The UniqueNetId is a class that the subsystems inherit from

#

So e.g. Steam or Oculus inherit from it to implement their own Id

#

So all you need to do is retrieve the Id from the PlayerState

#

and cast it to the specific child

#

Or just "ToString" it

#

If you want to expose it to BPs

#

You can use FUniqueNetIdRepl

#

Can't do much with it but you can pass it around in Blueprints. So just a small extra information

thorny tangle Jul 28, 2018, 5:19 PM

#

Hey! Have a quick question with C++ and Networking, so, we’re using the FPS Kit and we’ve tried hosting through Steam and Unreal itself and neither have gave us any results when we try to host a match, anyone know of any possible errors?

ember needle Jul 28, 2018, 6:22 PM

#

All, i’m thinking of making an ai follow a path. I think I have 2 options: 1. follow a spline or 2. substitute to the user inputs of the character movement component with some computed logic.

summer nova Jul 28, 2018, 6:22 PM

#

@ember needle dont do the input

#

just dont

ember needle Jul 28, 2018, 6:22 PM

#

the difference is: using a spline all clients and server have to compute the movement along the spline. Things will diverge and when replication adjustments come in, you will see a sudden movement on laggy clients.

#

AH.

summer nova Jul 28, 2018, 6:23 PM

#

i once tried to do that

#

cant recomend

ember needle Jul 28, 2018, 6:23 PM

#

damn.

#

i was thinking to do that on server

summer nova Jul 28, 2018, 6:23 PM

#

its just very hard to write the pathfollow code "emulating" player inputs

#

is better to hook up in some kind of intermediate part

ember needle Jul 28, 2018, 6:23 PM

#

and rely on prediction of the movement component.

#

it’s a very basic path, basically an helicopter coming over and landing n

#

@summer nova what is the alternative? spline path following will result in lagging clients experiencing random displacements

summer nova Jul 28, 2018, 6:25 PM

#

why would it?

#

make them pathfind on the client too

ember needle Jul 28, 2018, 6:25 PM

#

i’m seeing it

#

i’m seeing it

#

because of lag

summer nova Jul 28, 2018, 6:25 PM

#

uhm

#

what is your exact use case?

ember needle Jul 28, 2018, 6:26 PM

#

i’m spawning a replicated helicopter on server. then, every client and server compute the path

summer nova Jul 28, 2018, 6:26 PM

#

why does that need to be a movement component?

ember needle Jul 28, 2018, 6:27 PM

#

i’m not using it if following spline

#

i was planning on using it if i was going the “emulate user” path that you don’t recommend

#

spline following is a basic replicated actor

#

if i go this route i could have the server send periodical replication location messages and then lerp to them on clients

summer nova Jul 28, 2018, 6:40 PM

#

emulate user with a flying vehicle is even harder

#

you can try it, but wont be that easy, unless you have very arcadey type movement

#

main issue is that its way too easy to not control accelerations well, and that you need your own path follow component

#

for example you overshoot on curves unless you brake properly

winged badger Jul 28, 2018, 6:43 PM

#

character stopping every time he hits a pathing point for a frame was what made me give up after an hour trying to make that work

#

that, and the fact that Path always seems to be Valid, if you didn't request anything 0,0,0 will do

#

and when completed, it would go back to the original starting point

#

all that combined made me think making simulating input work is way too much of a hassle

summer nova Jul 28, 2018, 6:45 PM

#

one of the classic tricks is to look ahead

#

you dont get the path location for "now"

#

you get it "2 meters ahead"

#

this makes it smoother

#

but you are on a VERY real risk of getting suck in a corner

ember needle Jul 28, 2018, 6:46 PM

#

yes that is what i am doing with the spline

summer nova Jul 28, 2018, 6:46 PM

#

not easy to tell the pathfind you NOT give you the points right at the corner

#

like, more at the middle of the polygon or something

#

or i just missed it

ember needle Jul 28, 2018, 6:46 PM

#

i compute the lenght of each component and if they are far away i accelerate to full speed

summer nova Jul 28, 2018, 6:47 PM

#

neat trick, thats like something i did

ember needle Jul 28, 2018, 6:47 PM

#

if lenght is under a certain value then speed is a portion

summer nova Jul 28, 2018, 6:47 PM

#

i had distances to the next node, and calculated the angle beetween segments

#

it was on that mech game i worked with

#

but was a long time ago

#

(Heavy Gear Assault), i was junior dev + ai programmer on that

ember needle Jul 28, 2018, 6:47 PM

#

i mean what i am doing works relatively nicely

#

except that i doubt the replication part

#

there’s no prediction

#

maybe i can try lerping to periodical position messages sent by server

winged badger Jul 28, 2018, 6:48 PM

#

prediction only comes into play when you have some information to predict with

#

like user input

ember needle Jul 28, 2018, 6:49 PM

#

well not really position, the % distance on the spline is enough

#

so if on client the % is bigger than the messages, slow down

#

(on the client)

winged badger Jul 28, 2018, 6:50 PM

#

but at the same time, it would replicate Velocity, which would slow you down automatically

ember needle Jul 28, 2018, 6:50 PM

#

yes but violently

summer nova Jul 28, 2018, 6:51 PM

#

just lerp mate

#

if its an AI is probably not important

ember needle Jul 28, 2018, 6:54 PM

#

@summer nova ok so you mean: spline path following, no CMC, actor replicated but position is custom replicated with lerp?

summer nova Jul 28, 2018, 6:54 PM

#

yes

ember needle Jul 28, 2018, 6:54 PM

#

👍

#

gonna trust you re the input emulation

summer nova Jul 28, 2018, 6:54 PM

#

for my VR game, i just lerped the transforms of the hands

#

can confirm it works perfectly fine

#

and stupid lerp at that

ember needle Jul 28, 2018, 6:55 PM

#

with server sending info when? 1hz?

summer nova Jul 28, 2018, 6:55 PM

#

as much as you can

#

so on tick

#

you just have a replicated variable

#

and lerp to that

#

its super easy

#

will do the trick

#

if it doesnt, then start thinking of more complicated ways of doing it

ember needle Jul 28, 2018, 6:56 PM

#

yes but doesn’t that overflood net?

summer nova Jul 28, 2018, 6:56 PM

#

how many dozens of helicopters do yu have?

thorny tangle Jul 28, 2018, 6:56 PM

#

Hey! Does anyone have a recommendation for my situation?

ember needle Jul 28, 2018, 6:56 PM

#

1 only 😄

summer nova Jul 28, 2018, 6:56 PM

#

then dont care

ember needle Jul 28, 2018, 6:56 PM

#

awesome

summer nova Jul 28, 2018, 6:56 PM

#

do the thing that works first

#

if its too fat, strim it

#

and if its too ugly, try to improve it

#

but its best to just do it on the EASIEST way first

ember needle Jul 28, 2018, 6:57 PM

#

then gonna set a rep variable /with notify

summer nova Jul 28, 2018, 6:57 PM

#

keeping in mind the more complicated ways, so you can "easily" upgrade/optimize it later if needed

#

why notify?

winged badger Jul 28, 2018, 6:57 PM

#

that is 480 bytes a second at 60 FPS

summer nova Jul 28, 2018, 6:57 PM

#

you dont even need notify

ember needle Jul 28, 2018, 6:57 PM

#

true indeed

summer nova Jul 28, 2018, 6:57 PM

#

@winged badger tick rate is 30 hz

#

it really is no issue

ember needle Jul 28, 2018, 6:58 PM

#

sounds good

summer nova Jul 28, 2018, 6:58 PM

#

my vr thing was perfect and i had 4 players, each of the players broadcasting and replicating position + rotation of both hands and head

#

you can allways lower tick rate, it will look fine

#

it will just be more delayed

#

if you are doing the simple lerp version

ember needle Jul 28, 2018, 6:59 PM

#

starting point is plain stupid https://gyazo.com/e300751e9267858a8ea167d0dad60f1a

Gyazo

▶ Play video

#

speed depends on distance between points

winged badger Jul 28, 2018, 6:59 PM

#

besides, your client can have a reasonably good idea for where the helicopter is going to

summer nova Jul 28, 2018, 6:59 PM

#

he could just fully sync it on the curve

#

and have it simulate on everyone

winged badger Jul 28, 2018, 6:59 PM

#

and how the server will decide on its movement

ember needle Jul 28, 2018, 7:00 PM

#

then i’ll need to understand how to compute yaw pitch roll to animate it properly

summer nova Jul 28, 2018, 7:02 PM

#

forget about those

#

use quaternions or go insane

ember needle Jul 28, 2018, 7:03 PM

#

hu?

#

how can i use quaternions there

winged badger Jul 28, 2018, 7:04 PM

#

quaternions will not use axii in world space for calculating rotators

summer nova Jul 28, 2018, 7:04 PM

#

but you can define quaternions easily from the axis

#

wich will be very useful

#

pitch/yaw/roll is a nightmare to work with

ember needle Jul 28, 2018, 7:04 PM

#

for pitch yaw roll?

summer nova Jul 28, 2018, 7:05 PM

#

so lets say forward axis is the curve direction, side axis is the curve tangent, and up axis is the reversed of the "inertia" gravity

#

now you get banking

ember needle Jul 28, 2018, 7:05 PM

#

weirdly enough acceleration is always 0 when setting position of the actor

#

that would help in pitch at least

#

helicopter increase pitch when accelerating forward

summer nova Jul 28, 2018, 7:07 PM

#

you can create a rotator/quat from 3 axis

#

forwards, right, and up

#

keep that in mind becouse its going to be VERY useful for you

winged badger Jul 28, 2018, 7:08 PM

#

the delta of tangent to the spline (would be your right vector) between 2 frames could be a reasonable starting point to calculate roll from

summer nova Jul 28, 2018, 7:08 PM

#

given you have the spline tangents and stuff

ember needle Jul 28, 2018, 7:08 PM

#

i realized i’m off topic. 😃 will be in vacation, will experiment and report back. thank you all.

vale ermine Jul 28, 2018, 8:36 PM

#

If I add a component to an actor, it would only be visible to the client that added the component? This is what I am going for because I do not want the components to be replicated. I want only the actor that added the component to be able to see the component.

winged badger Jul 28, 2018, 8:59 PM

#

you should add it at runtime

#

and only if the Pawn IsLocallyControlled

#

so, has to be done after it has a valid Controller

thorny tangle Jul 28, 2018, 9:03 PM

#

we’re using the FPS Kit and we’ve tried hosting through Steam and Unreal itself and neither have gave us any results when we try to host a match, anyone know of any possible errors?

vale ermine Jul 28, 2018, 9:06 PM

#

https://docs.unrealengine.com/en-US/Gameplay/Networking/Actors/Components I just read this and it helped me understand things a bit better. Now I feel safe coding it in knowing that if I add a component at run time it should not replicate unless I set it to.

winged badger Jul 28, 2018, 9:07 PM

#

@thorny tangle read the OutputLog

#

it will be different on server and clients

thorny tangle Jul 28, 2018, 9:08 PM

#

We've done that.

#

Changed things nearly 10 times, and nothing.

winged badger Jul 28, 2018, 9:08 PM

#

paste the server/client logs

thorny tangle Jul 28, 2018, 9:08 PM

#

To you?

winged badger Jul 28, 2018, 9:09 PM

#

you can just drop a file

thorny tangle Jul 28, 2018, 9:09 PM

#

📎 FPSTemplate.log

winged badger Jul 28, 2018, 9:09 PM

#

in the channel is also fine, anyone might spot your problem

thorny tangle Jul 28, 2018, 9:09 PM

#

Of course.

winged badger Jul 28, 2018, 9:11 PM

#

that is the server log?

thorny tangle Jul 28, 2018, 9:11 PM

#

That's just the log from my computer, sorry, let me try and see where I can find it.

winged badger Jul 28, 2018, 9:11 PM

#

i do not see it listening for incoming connections

#

(did you open a map with ?listen parameter) ?

thorny tangle Jul 28, 2018, 9:12 PM

#

One second, I'm just trying to explain our issue, not exactly a programmer.(sorry)

#

I don't believe we set-up a master server though @winged badger

#

Would that matter?

#

@winged badger Would you know where to look?

unique thunder Jul 28, 2018, 10:02 PM

#

anyone know what might be causing stuttering / jittery animation client-side and only for other players? Everyone sees their own animation smoothly but everyone other than themselves is in perpetual lag.

#

tested this in a basic, empty level and can confirm it's not a bandwidth or performance issue.

winged badger Jul 28, 2018, 10:14 PM

#

server constantly overwriting locally calculated variables relevant to animation

next falcon Jul 28, 2018, 10:20 PM

#

How do i get a Variable from server without replication?

Example: i have a Test actor(replicated, always relevant) and it adds a testcomponent(on client, not replicated). in the test actor is a TMap and the unreplicated Component needs a value from the map

How does the component get it ?

manic pine Jul 28, 2018, 10:25 PM

#

an rpc on the test actor

unique thunder Jul 28, 2018, 10:25 PM

#

@winged badger that's what I was thinking, but how do I prevent this from happening?

#

I have 2 components that are replicated which drive an animation blueprint that animates the skeletal mesh in the replicated actor

winged badger Jul 28, 2018, 10:27 PM

#

have either server calculate everything and replicate, or have it replicate the bare minimum and calculate them locally on RepNotify

unique thunder Jul 28, 2018, 10:27 PM

#

but im not doing any of the calculations manually myself

next falcon Jul 28, 2018, 10:29 PM

#

@manic pine that doesn't work cause it is a map who can't be replicated

manic pine Jul 28, 2018, 10:29 PM

#

you said you needed a value from the map, not the entire map

winged badger Jul 28, 2018, 10:29 PM

#

then replicate with RepNotify, Lerp between received value and backup saved in a variable, then save the new backup

next falcon Jul 28, 2018, 10:30 PM

#

jeah but if i just store the value in a replicated variable every player can see

winged badger Jul 28, 2018, 10:30 PM

#

i don't know your setup, but clients are probably calculating something on their own, and that gets "corrected"

#

resulting in jitter

manic pine Jul 28, 2018, 10:31 PM

#

does the player own this TestActor?

next falcon Jul 28, 2018, 10:31 PM

#

no the map

manic pine Jul 28, 2018, 10:32 PM

#

i mean is the player the network owner of the testactor?

next falcon Jul 28, 2018, 10:33 PM

#

what do you mean?
it is already in the map with the gamestart and not spawned

manic pine Jul 28, 2018, 10:33 PM

#

ah alright

vocal dagger Jul 28, 2018, 10:33 PM

#

so does anyone know where I can get information if a local player is talking? I've tried VoiceIntPtr->IsLocalPlayerTalking(LocalPlayer->GetControllerId()); but that doesn't seem to work

manic pine Jul 28, 2018, 10:33 PM

#

make an RPC on the character/controller which receives the value from the testactor

#

client rpc so only owner receives it

#

alternatively a replicated owner-only var on the character which takes the value

next falcon Jul 28, 2018, 10:36 PM

#

uhm

#

let me test something quick

#

Okay no idea what u mean

#

i can't even acces the server from the component

#

Example:
Component -> OnOwner [(Owning)Get Var] -> [(Server) Set Var]

The Get var gets called but the ser var never.

@manic pine

#

📎 unknown.png

manic pine Jul 28, 2018, 10:43 PM

#

what you wanna do is, from what i gather

Client tells server he wants a certain value
Server sends that value back
is this correct?

next falcon Jul 28, 2018, 10:45 PM

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not really

Unreplicated component spawnes on client
that component wants a value from a serversided Map Var
Component ask for that value and if it exist
Server tells component if it exist and the value

manic pine Jul 28, 2018, 10:47 PM

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right, same essential steps. however, you cant communicate with the server except through actors which the client has ownership over

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which means either character, playercontroller or playerstate

next falcon Jul 28, 2018, 10:47 PM

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Ouh ****

manic pine Jul 28, 2018, 10:48 PM

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so your unreplicated component is gonna have to go through one of those three to tell the server which value he wants

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the server then has to go through one of those three to return the value

next falcon Jul 28, 2018, 10:48 PM

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how do i create my own actors which the client has ownership over

manic pine Jul 28, 2018, 10:49 PM

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actor->setowner(that specific player's playercontroller)

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(on the server)

next falcon Jul 28, 2018, 10:49 PM

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mhh does actor components work too ?

manic pine Jul 28, 2018, 10:50 PM

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i havent used actor components much, but i would imagine actors spawned by those simply inherit the actor component's owner

next falcon Jul 28, 2018, 10:50 PM

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God **** harder than i thaught

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but i learned more about replication 😄

manic pine Jul 28, 2018, 10:53 PM

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seems youd want something like:
component -> playercontroller->server get value-> serverTestActor->playercontroller->clientreturnvalue

next falcon Jul 28, 2018, 10:54 PM

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jeah thats what i want
But more like:
component -> playercontroller->find the test actor-> server get value-> serverTestActor->playercontroller-> find the component -> clientreturnvalue

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so many ways between
Does that effect something ?

manic pine Jul 28, 2018, 10:55 PM

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whats 'find the test actor' mean

next falcon Jul 28, 2018, 10:56 PM

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"Get all actors of class" and than find the actor to get a referance to it

manic pine Jul 28, 2018, 10:56 PM

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just pass it along into the playercontroller

next falcon Jul 28, 2018, 10:56 PM

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oh wait

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jeah u r right

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thats more easy

manic pine Jul 28, 2018, 10:57 PM

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you can even pass it along into servergetvalue

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and back again into clientreturnvalue

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so you never need to search for it

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if its a map-static actor then both client and server should have access

next falcon Jul 28, 2018, 10:58 PM

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okay ill try it

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Nope

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Doesn't work

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Doesn't work like that @manic pine

📎 unknown.png

manic pine Jul 28, 2018, 11:06 PM

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Child is the TestActor?

next falcon Jul 28, 2018, 11:07 PM

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Child is the component

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Test is testactor

manic pine Jul 28, 2018, 11:07 PM

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component doesnt exist on server

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sending a reference to that just results in a nullptr

next falcon Jul 28, 2018, 11:08 PM

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Doesn't work like this too

📎 unknown.png

unique thunder Jul 28, 2018, 11:08 PM

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any gamelift users?

manic pine Jul 28, 2018, 11:09 PM

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you cant send the component through RPCs since the server doesnt know about it, only the TestActor... in addition, you cant call Client RPCs on the TestActor(or its component) since the player isnt the owning client

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your player controller should have both RPCs

next falcon Jul 28, 2018, 11:10 PM

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OUH now i know what u mean
I need to store it in a variable before to server?

manic pine Jul 28, 2018, 11:11 PM

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you can do that, or you can just use a function on the TestActor which is executed locally

next falcon Jul 28, 2018, 11:11 PM

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what

manic pine Jul 28, 2018, 11:11 PM

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TestActor->ReceivedServerResponse(var requestedvalue), and then the TestActor on the client side informs the local component

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eh nvm all that, just store component in a var on client's server controller

next falcon Jul 28, 2018, 11:12 PM

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no no no i wanna know pls

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gimme knowledge

manic pine Jul 28, 2018, 11:14 PM

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your playercontroller should have a function called something like ServerRequestValue(TestActor, requestedvalue)... this in turn calls TestActor->GetValue(requestedvalue)... and then calls ClientReceiveRequestedValue(value).. which then does TestActor->ReceivedRequestedValue(value) which tells the local component the value

next falcon Jul 28, 2018, 11:16 PM

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Oh wait ill test it

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how do i find my component in there

manic pine Jul 28, 2018, 11:21 PM

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your client-side TestActor knows about your component, yes?

next falcon Jul 28, 2018, 11:21 PM

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ya

manic pine Jul 28, 2018, 11:22 PM

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so when playercontroller receives ClientReceiveRequestedValue(value) from server, it calls the TestActor to let it know the value has been received

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TestActor in turn informs the component

next falcon Jul 28, 2018, 11:24 PM

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okay got it now..
But so many roundabout over the playercontroller
getting a simple variable

manic pine Jul 28, 2018, 11:28 PM

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if you wanna hide it from other players yah

next falcon Jul 28, 2018, 11:29 PM

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does that way effect the system a lot ?

manic pine Jul 28, 2018, 11:30 PM

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well, youd still need to call server through character/controller/playerstate

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but you could return it via TestActor

next falcon Jul 28, 2018, 11:31 PM

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if i do it 200 times a tick ? does it effect the fps or something ?

manic pine Jul 28, 2018, 11:32 PM

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well yes, anything done that many times a tick would, and also network traffic

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if this is something you need to do regularly then youre probably doing something wrong

next falcon Jul 28, 2018, 11:33 PM

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mhh is there any other way i can get a variable by a key thing?

manic pine Jul 28, 2018, 11:34 PM

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it might help if you explain what exactly youre trying to achieve

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from a gameplay perspective

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there's usually many ways to achieve any one goal

next falcon Jul 28, 2018, 11:37 PM

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Multiplayer-Chunk System
each chunk is a intvector(The Key) and the data for the chunk (The value)
Each player has a max of 8 chunkrange around (4096) but not replicated so only he can see it(for graphics) but still need server landscape data

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so where to store the chunk data? and in what ?

manic pine Jul 28, 2018, 11:41 PM

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hmm why does the client need to request anything?

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the server knows where the client is in the game world

unique thunder Jul 28, 2018, 11:42 PM

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can cross-platform be done without writing your own online subsystem if you're using dedicated servers?

manic pine Jul 28, 2018, 11:43 PM

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cant he just give him the relevant chunks unasked?

next falcon Jul 28, 2018, 11:43 PM

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Not anything but if i change something in a chunk the server need to save that

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wait

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like if the player moves in the other chunk the server gives him the data ?

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for surrounding chunks ?

manic pine Jul 28, 2018, 11:44 PM

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yes

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server knows where the player is

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and thus what chunks he will need

next falcon Jul 28, 2018, 11:44 PM

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but if the players chunkrange is like 4 and others are not need ed ?

manic pine Jul 28, 2018, 11:45 PM

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you only replicate relevant chunks

next falcon Jul 28, 2018, 11:45 PM

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replicated chunks are only the chunk in where he is and surroundings like chunk range 1

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oh no wait nvm

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but u think that would be more efficent when there are 50 players there and every one is walking into a new chunk ?

manic pine Jul 28, 2018, 11:48 PM

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well the server is still gonna have to send the same amount of data

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but there shouldnt be any need for the client to actually ask for that data

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the server should be able to tell which chunks the client needs

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based on his position

next falcon Jul 28, 2018, 11:50 PM

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jeah ill do it like that

Can i add u as friend?
(if it doesn't work) 😄

manic pine Jul 28, 2018, 11:51 PM

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sure

thorny tangle Jul 29, 2018, 1:25 AM

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Does anyone have any familiarity with the FPS Kit? Because when we package the build, it seems and try to host a game, it seems outside networks can’t view said server.

unique thunder Jul 29, 2018, 1:45 AM

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@thorny tangle Make sure ports are open

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Does anyone have experience with replicating for ded servers?

thorny tangle Jul 29, 2018, 1:54 AM

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@unique thunder Query And 80 ports are open

static lynx Jul 29, 2018, 2:03 AM

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So I have two pawns, each with their own player controller assigned. Using blueprints, I'm trying to look at the one pawn from the other, press a key, and call an event on the client I'm looking at

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but I can't see to figure out how to do that. any ideas?

unique thunder Jul 29, 2018, 2:21 AM

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📎 unknown.png

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Scenario: Player reloads gun

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Will this format work for that? Including: animation, sound effects, visibility toggles, variable changes

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Dedicated server.

grand kestrel Jul 29, 2018, 6:03 AM

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@unique thunder Ah.. not really? First of all, there will be an input delay, the reload wont start until the server multicasts it, which should be fine for simulated proxies but not the local player.. also that IsLocallyControlled node is very out of place, not sure if that's left over from something else

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It's a bit odd either way

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What I'd do is have a common entry-point, that can be called locally or from the server (even if you never use it), then have a ServerReloadWeapon and ClientReloadWeapon function, if SwitchHasAuthority is Authority then call ClientReloadWeapon, otherwise if it's local but has an owning connection (can call RPCs, dunno if BP has a node for this, you can check if a character is >= autonomous proxy though) then call the ServerReloadWeapon but also call the local function that performs the actual reload, this way if it's called from the server, the client will lead the call, should prevent any mismatches (such as if both the client and server called it within a certain time - specifically lower than the latency).. You should'nt need to run this on the proxies, just multicast the animations and replicate the ammo count

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This "recipe" works for tons of stuff

📎 UE4Editor_2018-07-29_18-16-55.png

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Dunno if that's worth pinning, but feel free if [you - mods] think it's worthwhile

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Translated it from C++ but should be accurate

winged badger Jul 29, 2018, 8:56 AM

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@grand kestrel that looks awfully strange

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@unique thunder you're missing calling the EventLogic from InitializeEvent there, and connecting Branch to Cast, other then that, it will work - doesn't matter if its dedicated or listen server

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(client starts reloading locally to make the game feel more responsive, and calls the server event, which in turn multicasts, which executes reload logic on every machine, except the one it originated from)

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as long as the InitializeEvent is an InputAction, you're good - but if server were to call EventLogic (reload) automatically when AmmoCount hits 0, then EventLogic would not execute on OwningClient

grand kestrel Jul 29, 2018, 9:09 AM

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@winged badger Doesn't look strange in C++

void AWeapon::Reload()
{
    if (GetOwner() && CanReload())
    {
        if (GetOwner()->Role == ROLE_Authority)
        {
            // Client leads requests to remove inconsistencies (so we don't call local)
            ClientReload();
        }
        else if (GetOwner()->GetNetConnection())
        {
            // Tell the server to Reload the weapon then process the reload locally
            ServerReload();
            LocalReload();
        }
        else
        {
            LOG_ERROR("Illegal call to Reload on a non-local/authoritive owner without net connection");
        }
    }
}

void AWeapon::ClientReload_Implementation()
{
    if (GetOwner())
    {
        if (GetOwner()->Role < ROLE_Authority)
        {
            ServerReload();
        }
        LocalReload();
    }
}

bool AWeapon::ServerReload_Validate() { return true; }
void AWeapon::ServerReload_Implementation()
{
    LocalReload();
}

void AWeapon::LocalReload()
{
    if (CanReload())
    {
        // ----- Reload logic
    }
}

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Blueprint just convolutes the living hell out of the most basic things

winged badger Jul 29, 2018, 9:10 AM

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what i mean is, if listen server runs that, then he is also the owning client

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and any connected clients will not have any idea about any reload

grand kestrel Jul 29, 2018, 9:10 AM

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Oh, yeah, I didn't account for that because I haven't made any games that are on listen server, oops

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Well, they don't need to

winged badger Jul 29, 2018, 9:11 AM

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what if they need to play an animation for reloading?

grand kestrel Jul 29, 2018, 9:11 AM

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You handle that on a case by case basis, this is a template

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Doesn't have to be for reloading

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void AWeapon::LocalReload()
{
    if (CanReload())
    {
        // ----- Reload logic
        if (GetOwner()->Role == ROLE_Authority)
        {
            // Multicast animations and cosmetics
        }
    }
}

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The purpose of this is that the client can respond immediately, no waiting for server confirmation (depending on what it is you might want to validate the result for fringe cases)

thin stratus Jul 29, 2018, 9:13 AM

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May I ask why you go from Server to Client and then to Server?

winged badger Jul 29, 2018, 9:14 AM

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that is the other part of strange, had to read it 3 times

grand kestrel Jul 29, 2018, 9:14 AM

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It's pretty important

thin stratus Jul 29, 2018, 9:14 AM

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Well now I'm curious why this would be important

grand kestrel Jul 29, 2018, 9:14 AM

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Prevents mismatches

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Maybe not for reloading

winged badger Jul 29, 2018, 9:14 AM

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what Sinn posted, aside from not calling the EventLogic from InitializeEvent will handle any InputAction correctly

grand kestrel Jul 29, 2018, 9:14 AM

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Since if it's already reloading and you call it again presumably it would do nothing

thin stratus Jul 29, 2018, 9:15 AM

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That doesn't really tell why you go from Server to Client to Server

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It's not really needed to do that

grand kestrel Jul 29, 2018, 9:15 AM

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It's in the comments..

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// Client leads requests to remove inconsistencies (so we don't call local)

thin stratus Jul 29, 2018, 9:15 AM

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What inconsistencies?

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You call a ClientRPC on the Server to tell the Client to reload

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And in that you tell the Server again to reload

grand kestrel Jul 29, 2018, 9:16 AM

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OK fine, in Sinn's specific case it's not needed

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🤷

thin stratus Jul 29, 2018, 9:16 AM

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Then give me an example where it's needed.

grand kestrel Jul 29, 2018, 9:16 AM

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Just wanted to offer something more useful and flexible

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OK

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Lets say you have several weapons and you can switch between them

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Like in most FPS

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If the server forces a weapon switch at the same time as the player switches the weapon themselves

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Mismatches are entirely possible

thin stratus Jul 29, 2018, 9:17 AM

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That would only happen if the two can get async

grand kestrel Jul 29, 2018, 9:17 AM

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Why wouldn't they?

thin stratus Jul 29, 2018, 9:17 AM

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Well, a weapon switch usually has a "CurrentWeapon" variable

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Which usually is RepNotify marked

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If the Client changes it and the Server, then the Server will outrule this in the end

grand kestrel Jul 29, 2018, 9:18 AM

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I validate the result with an RPC

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For fringe cases, which never occur thus far

thin stratus Jul 29, 2018, 9:19 AM

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So in case both do it the exact time

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And the Client switch to weapon A

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While Server also wants to

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And that ends up as double switch to Weapon B?

grand kestrel Jul 29, 2018, 9:19 AM

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OK so if the client switches to Weapon A then to Weapon B then the server switches to Weapon A then the client switches to Weapon C then back to B then to A then again to C, if they're spamming the input

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At some point the server is going to start replicating

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And overwriting the client

thin stratus Jul 29, 2018, 9:20 AM

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So you add the same concept to weapon switch that you add to movement code

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So that a Clients choice won't get overridden by server responses

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I see

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Can't you solve that with a boolean

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That says "IsSwitchingWeapons"

grand kestrel Jul 29, 2018, 9:21 AM

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I mean, I've already solved it

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I'm not saying there aren't other ways to do this

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But it works

thin stratus Jul 29, 2018, 9:21 AM

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I know

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But seeing the Server->Client->Server solution for this makes me think if there isn't a better way

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A guess the best way would be time stamping the calls, similar to moves

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And check that the Servers aren'T overriding clients if it lags are if the client changes often

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Well okay

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Thanks for giving an example (:

grand kestrel Jul 29, 2018, 9:23 AM

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I was hoping you'd have a better solution in the end, even if it means I'm wrong 😛

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But that said

thin stratus Jul 29, 2018, 9:23 AM

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Yeah well, I would try to lock the action

grand kestrel Jul 29, 2018, 9:23 AM

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I don't have any issues with the current one

thin stratus Jul 29, 2018, 9:23 AM

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If any of the two tries to switch the weapon

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The Server sets a boolean to true

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And only to false after the switch is complete

grand kestrel Jul 29, 2018, 9:23 AM

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Oh, right

thin stratus Jul 29, 2018, 9:23 AM

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So you can'T call another switch unless that one is done

grand kestrel Jul 29, 2018, 9:23 AM

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So in our game if you keep scrolling the mouse it interrupts the switch, so if scrolling up goes pistol->rifle->sniper->SMG it doesn't need to finish the switch

thin stratus Jul 29, 2018, 9:24 AM

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You can combine that with the CurrentWeapon RepNotify variable to also stop the client

grand kestrel Jul 29, 2018, 9:24 AM

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That way with a bit of muscle memory you can quickly scroll to any weapon you want

thin stratus Jul 29, 2018, 9:24 AM

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Ah well

grand kestrel Jul 29, 2018, 9:24 AM

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An alternative would be to buffer the inputs and start after a small window

thin stratus Jul 29, 2018, 9:24 AM

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At that point you might want to only send the weapon switch code to the server if the client stops scrolling

grand kestrel Jul 29, 2018, 9:24 AM

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But that adds a bit of delay (probably not actually an issue) and still doesn't let you change your mind during a switch

thin stratus Jul 29, 2018, 9:25 AM

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The client can do all sorts of things local

grand kestrel Jul 29, 2018, 9:25 AM

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But if you have a really heavy weapon, as an example, it might take a long time to switch to/from, so partial interrupts would then be a very important gameplay element

thin stratus Jul 29, 2018, 9:25 AM

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Show the scrolling in the UI for example

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But only if he stops scrolling, you actually tell the SErver to swap

grand kestrel Jul 29, 2018, 9:25 AM

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Yeah, that's true

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We do attachments during the scrolling, though, so your characters actually doing stuff, and can place it in their hand part way through the transition

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And attachments replicate

thin stratus Jul 29, 2018, 9:26 AM

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Idk if you have the choice to simulate that

grand kestrel Jul 29, 2018, 9:26 AM

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We want it to show up on proxies too

thin stratus Jul 29, 2018, 9:26 AM

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Ah well

grand kestrel Jul 29, 2018, 9:26 AM

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Hmm maybe

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I mean, this is my use case anyway

thin stratus Jul 29, 2018, 9:26 AM

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Then you might really want to think about the solution similar to how moves are saved

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But there is probably a simpler solution