#multiplayer | Unreal Source | Page 445

real yacht Feb 28, 2019, 1:50 PM

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📎 bbb.png

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and this last screenshot is when health is decreased, and nickname is not printed ..

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i can't get nickname from instigator and i cant get nickname from myGameState (game state exists on clients and server)

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so my question is, how can i print some var from myPlayerState.

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😃

jade gazelle Feb 28, 2019, 2:03 PM

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How are you setting the nickname? If you are setting it on the client then the server is not going to be able to see it

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And it will be empty as in your image

real yacht Feb 28, 2019, 2:05 PM

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im setting in begin event in my pla

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my player state

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so i should have server event

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to set nickname

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?

jade gazelle Feb 28, 2019, 2:07 PM

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Just do a switch has authority after begin play, and set the nickname from the authority branch

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And make sure the nickname is replicated

real yacht Feb 28, 2019, 2:08 PM

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i will try that

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thnx

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📎 unknown.png

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this is my player state

jade gazelle Feb 28, 2019, 2:09 PM

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Yeah you are setting it on the client, so the server won’t have it

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You may have to use an RPC though if you are pulling data from Game Instance. Since the server won’t have access to your client game Instance data

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So in that case, on begin play, run an execute on server RPC that sets the nickname and pass in the name data as a parameter

real yacht Feb 28, 2019, 2:11 PM

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cool thnx

maiden vine Feb 28, 2019, 2:54 PM

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anyway to change port numbers for a listen server?

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Im using blueprints execute console or open level options listen

ivory portal Feb 28, 2019, 3:17 PM

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In settings no?

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📎 unknown.png

worthy wasp Feb 28, 2019, 3:21 PM

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Is this reacting correclty - NonSeamless gamemodes in a dedicated server - when you use OpenLevel() - the client actually disconnects from the dedicated server?

ivory portal Feb 28, 2019, 3:21 PM

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and reconnects

worthy wasp Feb 28, 2019, 3:21 PM

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reconnect definitely isnt happening

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my player array goes from 2 - to 1 when this happens

ivory portal Feb 28, 2019, 3:23 PM

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So what happens? You are playing in Map1, dedicated server does OpenLevel and then you are in Map2?

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"When a client executes a non-seamless travel, the client will disconnect from the server and then re-connect to the same server, which will have the new map ready to load."

worthy wasp Feb 28, 2019, 3:23 PM

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maybe thats the problem

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i was using OpenLevel on the local player

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so the server has to roll EVERYONE over to a new map?

ivory portal Feb 28, 2019, 3:24 PM

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Why not use servertravel?

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https://docs.unrealengine.com/en-us/Gameplay/Networking/Travelling

worthy wasp Feb 28, 2019, 3:24 PM

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https://puu.sh/CT2F8/f03bbbd824.png

ivory portal Feb 28, 2019, 3:25 PM

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execute console

worthy wasp Feb 28, 2019, 3:25 PM

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roger that

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i thought OpenLevel was the BP function for this

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which is why i was using it

naive shell Feb 28, 2019, 3:25 PM

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Server travel didnt worked for me after the session is created

ivory portal Feb 28, 2019, 3:25 PM

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ah no, you can do execute console with "servertravel newmap"

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only the server should execute this

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clients will normally automaticly follow

naive shell Feb 28, 2019, 3:26 PM

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Oh

ivory portal Feb 28, 2019, 3:26 PM

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don't forget to create an empty level for your transition map

naive shell Feb 28, 2019, 3:26 PM

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Is the cmd writtern ok?

📎 unknown.png

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And the event on run serveR?

📎 unknown.png

ivory portal Feb 28, 2019, 3:27 PM

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Don't forget to enable seamless travel in your gamemode

naive shell Feb 28, 2019, 3:27 PM

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I did

ruby furnace Feb 28, 2019, 3:27 PM

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Are there command line arguments for starting a dedicated server with a different map?

worthy wasp Feb 28, 2019, 3:27 PM

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so this maybe something i'm not understanding.....

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though it doesnt relate to my game at this poitn - i still want to understand it

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how does an MMO handle clients traveling to different maps -

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because - its a dedicated server (to my knowledge?)

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and when one client treavels from stormwind to ironforge - the entire games poplulous doesnt follow....

ivory portal Feb 28, 2019, 3:29 PM

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📎 unknown.png

naive shell Feb 28, 2019, 3:29 PM

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Im totally new to multiplayer

ruby furnace Feb 28, 2019, 3:29 PM

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You can design that yourself. But probably some main server that knows what servers belong to a "world" or however they call that in MMO games

worthy wasp Feb 28, 2019, 3:30 PM

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@ruby furnace - you owuld append ?Map=NAME to the options: https://puu.sh/CT2Ls/bc3b30b0c7.png

ivory portal Feb 28, 2019, 3:30 PM

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Stormwind to ironforge exist on one map. Stormwind to orgrimmar are different maps

worthy wasp Feb 28, 2019, 3:30 PM

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sorry thats wrong

ruby furnace Feb 28, 2019, 3:30 PM

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uhm I mean when you start the server from you command line

worthy wasp Feb 28, 2019, 3:30 PM

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it would be ?Map=NAME to the end of "open ipaddress" In https://puu.sh/CT2MM/21f77a4d97.png

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so like: "open 127.0.0.1?Map=YourMap"

ruby furnace Feb 28, 2019, 3:31 PM

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No when you start a dedicated server

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not from blueprints

worthy wasp Feb 28, 2019, 3:31 PM

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thats set in maps & modes

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server default map

ruby furnace Feb 28, 2019, 3:31 PM

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I know, but rather have a command line argument

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but it doesn't exist?

worthy wasp Feb 28, 2019, 3:32 PM

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https://puu.sh/CT2OT/788d5c25e4.png

ruby furnace Feb 28, 2019, 3:32 PM

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because this doesn;t work either:
https://docs.unrealengine.com/en-US/Programming/Basics/CommandLineArguments

worthy wasp Feb 28, 2019, 3:32 PM

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DefaultEngine.ini

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you can change it on the fly

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just by editing the .ini file

ruby furnace Feb 28, 2019, 3:32 PM

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yeah I know, well do just that I guess

worthy wasp Feb 28, 2019, 3:32 PM

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but

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does tthat translate to a packaged game?

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i'm unsure

ivory portal Feb 28, 2019, 3:32 PM

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You have a Server Map in project settings

worthy wasp Feb 28, 2019, 3:34 PM

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@ivory portal - i can understand level streaming - perhaps thats what all of this is.... and they just do a loading screen while streaming in the level.....?

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because certainly - players dont all travel from ogrimarm to stormwind when one client does this travel

ivory portal Feb 28, 2019, 3:34 PM

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No but this is more because of the network relevancy

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https://docs.unrealengine.com/en-us/Gameplay/Networking/Actors/Relevancy

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If AGameNetworkManager is set to use distance based relevancy, the Actor is relevant if it is closer than the net cull distance.

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So you can say

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"Give that client the players in X units distance"

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But see it as

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One server -> One map

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But your map can be gigantic

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Just think about, in vanilla WoW, the areas were massive but as soon in cataclysm you could fly in the vanilla world it was suddenly so small

naive shell Feb 28, 2019, 3:41 PM

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I cannot make the servertravel to work once the seesion has alredy been created

ivory portal Feb 28, 2019, 3:42 PM

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Whats the error?

naive shell Feb 28, 2019, 3:43 PM

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It doesnt load it

ivory portal Feb 28, 2019, 3:43 PM

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Can it find the map?

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Where are your maps located?

naive shell Feb 28, 2019, 3:43 PM

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In Root/Maps

ivory portal Feb 28, 2019, 3:43 PM

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and they are packaged?

worthy wasp Feb 28, 2019, 3:43 PM

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PIE testing - or standalone?

naive shell Feb 28, 2019, 3:43 PM

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In what sense

ivory portal Feb 28, 2019, 3:44 PM

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Ignore my comment

naive shell Feb 28, 2019, 3:46 PM

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This event is fired when all the players are ready

📎 unknown.png

worthy wasp Feb 28, 2019, 3:48 PM

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again - as tom said you dont exceuteall -> ServerTravel

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run it on the server - the rest of the connected clients will follow

naive shell Feb 28, 2019, 3:49 PM

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how do i do that im new to multiplayer i

worthy wasp Feb 28, 2019, 3:52 PM

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you have code that depicts "when all players are ready" right?

ember needle Feb 28, 2019, 3:52 PM

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I'm experiencing something incredibly hard to tackle. I'm really hope that some of you can point me in a right direction because, well, at this point my game is unuseable.

In a multiplayer game I have a slotting level, where players can choose which role to play. When a listening server is created, this level is opened, and the event BeginPlay of the level opens the widget that is responsible for all interaction.

I have a client that connects to a listening server successfully, however the BeginPlay event of the level on the client is never called, hence the client never sees the slotting widget.

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In this gif you can see that the server is listing both players in the "unassigned" section (still have to choose the role), and the client prints out "successfully joined". I'm using the advanced sessions plugin in this.

I really do not know how to debug this. I've tried removing all functionalities, I've tried opening a standard level (i.e. not one with a widget) and there too, it is not opened on the client.

Can someone help me please, all development is stopped as I do not know how to proceed.

naive shell Feb 28, 2019, 3:54 PM

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That event is firend on the lobby map, when a player joins the lobby, he can press join and that event is fired

ember needle Feb 28, 2019, 3:54 PM

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that's the issue, it is not

fleet raven Feb 28, 2019, 3:54 PM

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just do it in the player controller you use for that level instead of using the level event

ember needle Feb 28, 2019, 3:54 PM

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OK I can try that but it has other implications. Is this expected?

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Could it somewhat be related to a state I should put my GameMode in?

fleet raven Feb 28, 2019, 3:55 PM

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I don't know if it is expected, it's just an idea for a workaround so you can go on

ember needle Feb 28, 2019, 3:55 PM

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and thank you, it is a good idea, though it requires quite a lot of refactoring so I'd like to understand

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However it is definitely a good plan if everything else does not work

naive shell Feb 28, 2019, 3:56 PM

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I think i fixed it

ember needle Feb 28, 2019, 3:56 PM

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I do not use GameMode states (ready to play, etc), is that needed?

fleet raven Feb 28, 2019, 3:56 PM

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not really

ember needle Feb 28, 2019, 3:56 PM

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right

fleet raven Feb 28, 2019, 3:57 PM

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I think most people just use the game mode base

ivory portal Feb 28, 2019, 3:57 PM

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@naive shell Execute the command only on server and remove that player controller on it

naive shell Feb 28, 2019, 3:57 PM

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I think i got it

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btw that command only works on standalone play or build game

ivory portal Feb 28, 2019, 3:58 PM

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ah yes, dedicated servers are a bit harder to test in the editor

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In the pinned posts you have an image that tells the differences

maiden vine Feb 28, 2019, 3:59 PM

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i still cant start listen server in specific port number can you do this in execute console command or should i be trying other ways

naive shell Feb 28, 2019, 4:01 PM

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It did work now i gotta remove the lobby ui for al ll players

ember needle Feb 28, 2019, 4:02 PM

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Sorry to bug again, but who here does know when BeginPlay events in the level are supposed to get called?

naive shell Feb 28, 2019, 4:03 PM

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when the game starts

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thats why its called beginplay

ember needle Feb 28, 2019, 4:04 PM

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except it doesn't on clients that connect to server.

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I wander if something changed in 4.21 related to that, because in 4.19 everything worked.

covert garden Feb 28, 2019, 4:32 PM

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How to fix pawn is duplicate when more than 2 players spawn? In Dedicate Server

ivory portal Feb 28, 2019, 6:28 PM

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?

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How do you mean

covert garden Feb 28, 2019, 6:34 PM

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📎 unknown.png

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📎 unknown.png

kind niche Feb 28, 2019, 6:47 PM

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lol

vapid egret Feb 28, 2019, 8:42 PM

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How do I connect just by typing 127.0.0.1 without using "open" in my text box?

worthy perch Feb 28, 2019, 8:48 PM

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For a client to travel to a server, ClientTravel().

tropic snow Feb 28, 2019, 9:38 PM

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📎 unknown.png

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why doesn't this work?

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wont destory session

glass plaza Feb 28, 2019, 9:40 PM

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@vapid egret Use the Execute Console Command, and the append string node. (open + textbox) You can also add things like ?listen with that same append.

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@tropic snow Does it pass the Cast? Looks to me like it could fail there.

nocturne token Feb 28, 2019, 9:52 PM

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Has anyone ever had an issue where when they spawn a new pawn and a client possesses it

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That pawn does not think its locally controlled on the client?

vapid egret Feb 28, 2019, 10:08 PM

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@glass plaza Thx

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thank

dark edge Mar 1, 2019, 1:00 AM

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I'm working on spawning a pawn and various attached actors for multiplayer. How can I confirm that all the attached actors have replicated client side before doing some client side setup?

glass plaza Mar 1, 2019, 6:07 AM

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My players are suddenly spawning as Spectators instead of with their pawn and I can't figure out why. (I checked, GM->StartPlayersAsSpectators is not on true)

dark edge Mar 1, 2019, 6:16 AM

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What is the default pawn in game mode?

glass plaza Mar 1, 2019, 6:35 AM

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Ended up figuring it out. Forgot Super:: when I override PostLogin

tribal solstice Mar 1, 2019, 6:46 AM

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I keep getting a 'Steam API disabled' error when packaging my game. When I run it, the steam window still pops up in the bottom right, but my friend cannot join my server. Any ideas? I followed the Blueprint Multiplayer tutorial from Unreal.

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Is there an updated tutorial of how to get Steam subsystem working? I just did that whole official tutorial and it's not working. Any help would be awesome. Thanks.

fossil spoke Mar 1, 2019, 6:54 AM

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The process hasnt changed at all. Make sure your friend is in the same region, as the Dev App (ID 480) is region locked by default.

tribal solstice Mar 1, 2019, 6:56 AM

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Copy that. Any idea what the 'Steam API: disabled' warning means?

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LogPluginManager: Mounting plugin OnlineSubsystemSteam
LogPluginManager: Mounting plugin SteamVR
LogOnline: Display: STEAM: Loading Steam SDK 1.39
LogOnline: Warning: STEAM: Steam API disabled!
LogOnline: Display: STEAM: OnlineSubsystemSteam::Shutdown()
LogOnline: OSS: Unable to create OnlineSubsystem module Steam
UATHelper: Packaging (Windows (64-bit)): LogOnline: Display: STEAM: Loading Steam SDK 1.39
UATHelper: Packaging (Windows (64-bit)): LogOnline: Warning: STEAM: Steam API disabled!
UATHelper: Packaging (Windows (64-bit)): LogOnline: Display: STEAM: OnlineSubsystemSteam::Shutdown()
PackagingResults: Warning: STEAM: Steam API disabled!
UATHelper: Packaging (Windows (64-bit)): LogInit: Display: LogOnline: Warning: STEAM: Steam API disabled!

fossil spoke Mar 1, 2019, 6:57 AM

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Steam is not enabled while packaging

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Its safe to ignore it

tribal solstice Mar 1, 2019, 6:57 AM

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@fossil spoke Okay, thanks. I'll check regions.

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How do I ensure we're in the same region? We live in the same city.

fossil spoke Mar 1, 2019, 6:58 AM

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Your region is in your Steam settings

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If all that fails, make sure that whatever machine is hosting the Server has the correct ports forwarded and that the Firewall is not blocking the Server process.

tribal solstice Mar 1, 2019, 6:59 AM

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Is there any documentation on making sure correct ports are forwarded?

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and how to set Firewall to allow server process? I'm not seeing anything being blocked.

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App looks like it's set to public in firewall

tribal solstice Mar 1, 2019, 7:22 AM

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Ahhh.. looks like it may be an issue with Max Sessions Found as well. Since it uses app id 480 by default, there are generally a couple thousand other people playing 'Spacewar' at the same time so setting a Max for Sessions fails to find your specific one.

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Gonna try setting to 10,000 or so

thin stratus Mar 1, 2019, 8:31 AM

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@nocturne token Not directly, could only imagine this to return false before the client knows they got possessed

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E.g. BeginPlay. But I'm pretty sure you call your stuff properly timed.

nocturne token Mar 1, 2019, 8:36 AM

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So apparently GAS has a different way of checking locallity which is what I was fucking up

thin stratus Mar 1, 2019, 8:55 AM

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Ah well that system..

ember needle Mar 1, 2019, 9:20 AM

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I've written down the issue that I was explaining here yesterday. It's in https://answers.unrealengine.com/questions/878536/level-does-not-load-on-client-after-joining-a-serv.html

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If anyone has ever seen something similar or would know where to start looking it would be really helpful. I've been 20h on this already to no avail.

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TL;DR: level is not loaded on clients after joining.

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If I cannot find a solution I have to restart the project and gradually import, something extremely painful at this point (1 year of work)

thin stratus Mar 1, 2019, 9:30 AM

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@ember needle Nothing in your log suggests that it's not loading the map

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Rather the opposite

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Both Server and Client properly report that both are browsing and loading the map.

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Why do you think it's not loading the map? Cause the UI isn't showing up?

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Are you sure that this isn't a bug in your UI code?

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The LevelBlueprint should NOT hold the logic for the UI

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This should be placed in your PlayerController or HUD Class

ember needle Mar 1, 2019, 9:34 AM

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@thin stratus Because the level does not show. I've also tried loading a stupid level instead of the level with the widget, and that also doesn't appear.

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Also, the BeginPlay event does not get fired on the level of the clients

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I can surely move the logic from level to playercontroller, however the level is not loaded anyways

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the other weird thing is: sometimes if I resize the window it MAY suddenly appear. Or, if I record it with Gyazo, then it works all the time.

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So it seems something is related to displaying

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As per the bug in the UI, I've changed it to an empty UI with "TEST" only written in the middle of it, same thing

thin stratus Mar 1, 2019, 9:39 AM

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Can you recreate the issue in a fresh project?

ember needle Mar 1, 2019, 9:40 AM

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I was hoping to avoid that, but it seems the only thing I can do is to create a fresh project, and gradually import all the work of 1 year

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it's going to take a while and I was hoping to at least pin point what the issue might be

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everything is so dependant now that it's a nightmare to restart everything

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So my only hope is to recreate everything and "see if it works (TM)"? 😃

thin stratus Mar 1, 2019, 10:08 AM

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No, you want to make a simple fresh project

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And check if traveling works

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That takes like 5 minutes.

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If that works, then you have a bug in your project. And I'm still kinda sure this is related to your own code, because as mentioned, the logs show that the client travels and loads the map properly.

ember needle Mar 1, 2019, 10:11 AM

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I understand

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What I do not get though is: once I've established that an out of context small project works, how do I go in understanding what the issue is. Because I'm not stating it's an UE bug, it's most probably in my code indeed.

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I mean what can I possibly do for a BeginPlay event not to be fired, is the question.

real yacht Mar 1, 2019, 10:17 AM

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is this correct way to use instigated by (because when i have 2 clients, always prints one client nickname, but in gameState both are in array) what could be a problem? thnx

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📎 111.png

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when i'm printing playerArray from GameState

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both have correct nicknames

thin stratus Mar 1, 2019, 10:53 AM

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That you are passing the wrong Instigator

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@real yacht

real yacht Mar 1, 2019, 10:54 AM

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i was passing controller player in apply damage, now i think that maybe i should pass get instigator controller?

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is that correct?

thin stratus Mar 1, 2019, 10:54 AM

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You need to make sure you stay relative to the player applying damage

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You can't use PlayerController0

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So yeah, InstigatorController might help. I don't know where you call ApplyDamage.

real yacht Mar 1, 2019, 10:55 AM

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let me try with instigatorcntroll.

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@thin stratus it works now

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my mistake was with playerController()

raven holly Mar 1, 2019, 11:48 AM

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Everyone has access to game state yes?

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But only authority can modify

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I remember in the old IRC someone made a diagram of all these classes lol

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I should remake it

thin stratus Mar 1, 2019, 11:54 AM

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There are diagrams in my compendium

shut surge Mar 1, 2019, 12:23 PM

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Hi, i'm studying replication documentation. ROLE_None says object won't be replicated. So why to use this role at all? What's the difference between non replicated object all together?

red glade Mar 1, 2019, 12:28 PM

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Non replicated isn't told to other clients/server.
A player UI is only for the player, other players have no need to know it exists.

bitter oriole Mar 1, 2019, 12:28 PM

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I'm guessing the role is set when you disable rep ?

red glade Mar 1, 2019, 12:29 PM

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It's useful if you want to do something client side for a minute, then tell the server

shut surge Mar 1, 2019, 12:32 PM

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thanks, i think i get it!

red glade Mar 1, 2019, 12:33 PM

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Like if you are opening a paid door in game, lets say it costs $2000 to progress this way. And if you only have $1500 why even ask the server to check? Just check player side, if not enough cancel. (Using unreplicated events) and if they have enough then ask the server if they can open the door (then server does its check for security)

shut surge Mar 1, 2019, 12:39 PM

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and which actor in this example would have role set to None?

red glade Mar 1, 2019, 12:45 PM

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The door can be "unreplicated", I always prefer to not replicate static animations, you can tell the player to play the door open animation and it's much smoother as it's running directly in sync with your framerate. (Also not getting data from server then showing it, always seems to "lag" a little)

chrome bay Mar 1, 2019, 1:11 PM

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You don't really want clients opening things like doors locally. What happens in the case of late-join, or if the server decides you can't in fact open the door

hoary spear Mar 1, 2019, 1:15 PM

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Do you even want clients to localy check amount of $ ?

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wouldnt think so atleast

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Request server to open door -> Server checks players cash vs cost to open door -> Server opens door for specific player if enough cash

shut surge Mar 1, 2019, 1:18 PM

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do ALL actors in multiplay game have to have role? even static light pole?

chrome bay Mar 1, 2019, 1:21 PM

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Role is managed automatically - you shouldn't ever have to touch it

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If you do, expect things to break

shut surge Mar 1, 2019, 1:24 PM

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Right! I set replication rule. Engine will handle roles

chrome bay Mar 1, 2019, 1:25 PM

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Exactly, just set whether an object is replicated or not and the engine will handle the roles etc. based on ownership

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If something affects the state or rules of the game, the server should always handle it.

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Otherwise you just open yourself to cheating and/or desyncs

hoary spear Mar 1, 2019, 1:27 PM

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if someone gets desynced they're just thrown out, right?

chrome bay Mar 1, 2019, 1:27 PM

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By desync'd what i mean is, the client might open a door but the server might not

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Now the client has an open door, and both server and client don't know about the "true" states

shut surge Mar 1, 2019, 1:28 PM

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peer-to-peer throws peolpe out because there's not way to sync back players. In server authority case, you just roll back player to latest knows state

chrome bay Mar 1, 2019, 1:28 PM

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If the Server doesn't know the client opened the door, it won't tell it to close again.

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Just a simple example, but in general it's bad practice to manipulate something on the client before the Server says it's ok, or without the Server doing it.

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It costs one bit to say whether a door is open or not - worth paying that cost to prevent state desync

thin stratus Mar 1, 2019, 1:29 PM

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I don't think that's an issue though?

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If the state of the door is a simple RepNotify boolean

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Even if you open the door locally and the Server doesn't,

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As soon as the door actually gets opened, the RepNotify will call

chrome bay Mar 1, 2019, 1:30 PM

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Yeah but if they've opened the door already on the client, they won't get a rep

thin stratus Mar 1, 2019, 1:30 PM

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And then later to close it.

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Why wouldn't they?

twin vault Mar 1, 2019, 1:30 PM

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but if youre opening locally, whos gonna make the server open it, unless youre opening beforehand as a prediction

thin stratus Mar 1, 2019, 1:31 PM

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You don't have to set the RepNotify boolean on the Client

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Just use a local indicator for door open or not

chrome bay Mar 1, 2019, 1:31 PM

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So Client opens Door A and sets the replicated bool to 'Open' - Server gets the request to open it, and decides not to, so the bool stays false on the server, therefore it never sends an update

thin stratus Mar 1, 2019, 1:31 PM

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If I open the door on the client and I set my "Client Boolean" to "true", while the Server doesn't set the OnRep Boolean to true.

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I can later check in the onrep if my door is actually open

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And then either play the open anim

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Or just not

chrome bay Mar 1, 2019, 1:32 PM

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I mean you could.. but why would you 😄

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A lot of hoops to jump through to eliminate a few ms of lag when opening a door

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Also when the door does fail to open you'd get an ugly snap back to closed too I guess

hoary spear Mar 1, 2019, 1:32 PM

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In the example case aswell, the door costs something to open, so you should do request via server anyway, shouldnt you ?

thin stratus Mar 1, 2019, 1:32 PM

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Snap backs will always happen

chrome bay Mar 1, 2019, 1:33 PM

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IMO yeah

thin stratus Mar 1, 2019, 1:33 PM

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You def need to ask the server

chrome bay Mar 1, 2019, 1:33 PM

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Ask the Server to open the door, and the server sets the state of it

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When client receives that state, open or close

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That's the way I'd handle it

thin stratus Mar 1, 2019, 1:33 PM

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But nothing stops a player from opening a door clientside

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If it's important that whatever is behind the door can't be accessed without paying

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Then you should also tie the state of hte room behind the door to the server

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Means if I locally open the door by cheating money

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I should stand in an empty room

shut surge Mar 1, 2019, 1:34 PM

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I'm with eXi. Smoother experience. Although implementation might be complicated

thin stratus Mar 1, 2019, 1:34 PM

#

It's the little things I guess

#

You could also argue the same about shooting a projectile

#

Does it matter if the Player sees it spawning a few ms later?

#

Not it doesn't.

#

Most players will never notice

hoary spear Mar 1, 2019, 1:35 PM

#

Are there specific ways to handle resyncing aswell ?

#

in case of a desync

chrome bay Mar 1, 2019, 1:35 PM

#

nope

#

nothing outside of what's specific to your game

hoary spear Mar 1, 2019, 1:35 PM

#

seems like most games do some re-join event

thin stratus Mar 1, 2019, 1:35 PM

#

Probably more of an case to case situation

#

Or however you say that in English

#

If you door state desyncs, it can always be resynced next time the server forces you to sync it

#

If you need this for something, you can always tell the Server what you current state is and if that state is not the state that hte server has, force it

chrome bay Mar 1, 2019, 1:36 PM

#

This is a lot of effort for something as simple as a door 😄

thin stratus Mar 1, 2019, 1:36 PM

#

The Door is an example :D

#

It's how the CMC basically gets the "Move" RPC from the Client, performs the same movement and checks if the endLocation that the Client passed matches to what the Server reached.

chrome bay Mar 1, 2019, 1:37 PM

#

That is true, but the client is always sending updates and the server is always checking the state in that case

thin stratus Mar 1, 2019, 1:37 PM

#

I haven't seen a UE4 Game desync yet though

chrome bay Mar 1, 2019, 1:37 PM

#

And the server does no simulation until the client tells it to, so it's kind of taken care of through the implementation

thin stratus Mar 1, 2019, 1:37 PM

#

Most of the times, desyncing was encountered in Multiplayer Mods

#

Not counting forcing a desync by cheating money and openeing the door locally

hoary spear Mar 1, 2019, 1:38 PM

#

True that, i've only had issues connecting in the first place now that you mention it

chrome bay Mar 1, 2019, 1:39 PM

#

Yeah that's the kind of thing I'd want to avoid

#

So all it would boil down to is "hey server can you get this door for me fam?"

#

then Server says yes or noop

#

predicted doors? man that's next level

hoary spear Mar 1, 2019, 1:40 PM

#

half way through the door, it slams back in your face. prediction was wrong

shut surge Mar 1, 2019, 1:40 PM

#

TheJamsh, how you'd implement shooting?

chrome bay Mar 1, 2019, 1:40 PM

#

shooty guns are hard

#

lag really matters then

#

hence most games use hitscan cus it's easier

#

Look at ShooterGame for a starting point, even though I personally hate it

#

or wait like 10 years for me to finish this damn plugin

hoary spear Mar 1, 2019, 1:41 PM

#

hitscans feel unfair tho, but im not sure how much you'd notice it

chrome bay Mar 1, 2019, 1:42 PM

#

most players never notice tbh, and it gets hidden with FX and the like

hoary spear Mar 1, 2019, 1:42 PM

#

"If you reacted to the sound of the gun going off and required 0.20 seconds (twice that of the fastest Olympic sprinters) to react, then you would need to be at least 500 feet away to successfully dodge a bullet."

#

i guess that says it all

chrome bay Mar 1, 2019, 1:43 PM

#

When you start moving away from arena shooters and tackling larger engagement ranges though, then it's more noticeable

#

yeah

hoary spear Mar 1, 2019, 1:43 PM

#

if you're in the crosshair, you ain't dodging it

chrome bay Mar 1, 2019, 1:43 PM

#

lag compensation is the big thing, but few games bother with it. Or if they do it's very much favour the shooter

winged badger Mar 1, 2019, 1:43 PM

#

that depends on the speed of the bullet 😛 some of those fly faster then sound

#

the game doesn't feel responsive when you play if if you wait for server confirmation

hoary spear Mar 1, 2019, 1:44 PM

#

sucks when you run behind the concrete wall , but get hit cuz lag compensation

thin stratus Mar 1, 2019, 1:44 PM

#

Golden Rule: if(bIsPlayerBehindWall) bIsDead = true;

chrome bay Mar 1, 2019, 1:45 PM

#

haha

thin stratus Mar 1, 2019, 1:45 PM

#

Otherwise you fail the proper implementation of HitScan

chrome bay Mar 1, 2019, 1:45 PM

#

I've dabbled with it recently, it's actually quite easy to implement lag comp.. but the tuning is the hard part

#

gotta be enough to be noticeable, but not so much that people just feel robbed

hoary spear Mar 1, 2019, 1:45 PM

#

A neural net for tuning

#

Rei got that going

thin stratus Mar 1, 2019, 1:45 PM

#

Sure thing for a single dev.

#

Need that for my MMO.

chrome bay Mar 1, 2019, 1:46 PM

#

UT went with 120ms which IMO is quite high

thin stratus Mar 1, 2019, 1:46 PM

#

UT...

hoary spear Mar 1, 2019, 1:46 PM

#

120ms lag compensation ?

thin stratus Mar 1, 2019, 1:46 PM

#

I have it open on my right screen. They have two implementations of Stats

#

Where none of the two is fully used.

#

(╯°□°）╯︵ ┻━┻

chrome bay Mar 1, 2019, 1:46 PM

#

haha

#

UT is a frigging mess

#

some of that code is in fortnite too

#

amaze right

#

at least, I'm told fortnite uses a very similar system for it's weapons

#

since gameplay abilities doesn't really scale to shooty-shooty gun weapons

thin stratus Mar 1, 2019, 1:47 PM

#

Hm, maybe the AUTGameMode* UTGM = Cast<AUTGameMode>(UGameplayStatics::GetGameState(GetWorld()); is in there

chrome bay Mar 1, 2019, 1:47 PM

#

da fuq

#

I guess in fairness they never finished it 😄

#

too damn bad because I really wanted to see how they were gonna handle vehicles

#

my gut tells me client authority 😢

#

with a dab of sanity checking

shut surge Mar 1, 2019, 1:49 PM

#

haha

thin stratus Mar 1, 2019, 1:49 PM

#

https://github.com/EpicGames/UnrealTournament/blob/3bf4b43c329ce041b4e33c9deb2ca66d78518b29/UnrealTournament/Source/UnrealTournament/Private/UTLineUpHelper.cpp#L158

chrome bay Mar 1, 2019, 1:49 PM

#

lol

#

GG

thin stratus Mar 1, 2019, 1:49 PM

#

They also havea bug with RepNotify in it. Their RespawnTimer that is visible on the Screen only shows the Countdown the first time.

#

Second time you die, the RespawnTime is set again to the same value, not calling the OnRep, not updating the Client Variables

#

Which results in the UI showing "Press Fire To Respawn" while there is actually still the countdown

#

I first thought I had that bug on my end (was using their code), but well found out it wasn't my fault after all

chrome bay Mar 1, 2019, 1:51 PM

#

I've discovered using ServerWorldTimeSeconds is really handy for that kind of thing

#

It stays surprisingly well in-sync so long as your lag isn't fluctuating a lot

thin stratus Mar 1, 2019, 1:52 PM

#

I just force the value with an RPC now.

#

I don't see why i would need an OnRep for a time variable that is in the end only for the UI

#

It's not like you get relevant to your own PS and require the OnRep to fire

thin stratus Mar 1, 2019, 2:40 PM

#

@chrome bay https://www.youtube.com/watch?v=W3aieHjyNvw

YouTube

GDC

Overwatch Gameplay Architecture and Netcode

In this 2017 GDC session, Blizzard's Timothy Ford explains how Overwatch uses the Entity Component System (ECS) architecture to create a rich variety of laye...

▶ Play video

#

Thoguth you'd like having a look at that

#

chrome bay Mar 1, 2019, 2:41 PM

#

Haha, I had to go through someone to find that 😄 they finally made it public!

#

Their whole engine is based around ECS which is cool

#

totally different to unreal though

shut surge Mar 1, 2019, 3:08 PM

#

@thin stratus is this yours? https://forums.unrealengine.com/unreal-engine/feedback-for-epic/documentation-feedback/102360-blueprint-multiplayer-video-series-is-teaching-a-lot-of-wrong-things

#

man how i hate official ue4 video tutorials.. too much patronising. just get to the fucking point

#

and apparently they are buggy 😄

thin stratus Mar 1, 2019, 3:13 PM

#

That is my post, yes.

shut surge Mar 1, 2019, 3:14 PM

#

you get karma points for that post

thin stratus Mar 1, 2019, 3:15 PM

#

They haven't addressed it in 2 years

#

:P

astral gust Mar 1, 2019, 3:41 PM

#

Hey guys, does anyone know how to set a Steam session to game (play) rather than lobby? I haven't been able to find anything about this on the forums or docs.

📎 unknown.png

thin stratus Mar 1, 2019, 4:05 PM

#

Usually when start a session you can specify the name

#

Party or Game

#

Game is default, Party is most likely needing you to use C++.

#

It can be that Steam labels both "lobby" though idk

chrome bay Mar 1, 2019, 4:17 PM

#

Yeah I think it does

lost inlet Mar 1, 2019, 4:37 PM

#

one thing i'm wondering, if you join a game in progress and there's a replicated actor that has a replicated property that is not at the default value, will its rep notify be called?

fleet raven Mar 1, 2019, 4:39 PM

#

yes

#

need to be careful though: this will run before beginplay

lost inlet Mar 1, 2019, 4:41 PM

#

yeah i figured as much, i'm trying to look into a join in progress desync bug

#

unfortunately it's kinda hard to test those in the editor

bold hatch Mar 1, 2019, 7:42 PM

#

Hey guys does multiplayer have to be built at the beginning of a project ?

#

I havent read up the documentation yet but, ive been told it works really well and is alot easier to implement in ue as opposed to unity

thin stratus Mar 1, 2019, 7:52 PM

#

If you need Multiplayer, then yes

#

Otherwise you'll basically code your project twice

bold hatch Mar 1, 2019, 7:53 PM

#

How is it tested? Im a bit of a hardware guy, is the only testing be done locally?

thin stratus Mar 1, 2019, 7:56 PM

#

Depends on what you are going for in the end

#

To test Multiplayer in UE4, just for you, you can simply select 2+ players to have a ListenServer setup

#

Or 1+ Players in combination with enabling DedicatedServer to have a DedicatedServer setup

#

Both should however every now and then be tested in a fully packaged and compiled build

glass plaza Mar 1, 2019, 8:04 PM

#

Yeeahhh... My issue with my players appearing as Spectator pawns and not their properly pawn is back...

winter harness Mar 1, 2019, 8:06 PM

#

@thin stratus is 100% right about testing with packaged builds. The dedicated server simulation and multiplayer code in the editor is not quite right, and may be misleading when something work that wouldnt actually work in a true multiplayer setup.

bold hatch Mar 1, 2019, 8:14 PM

#

I was thinking of peer to peer multiplayer, is that do able in UE?

gleaming vector Mar 1, 2019, 8:21 PM

#

true peer to peer is not

#

but having one of the players be a host and others connect to it (like most console games do) is perfectly possible

#

host migration is a pain in the butt though

bold hatch Mar 1, 2019, 8:22 PM

#

Does UE's documentation have more info on that @gleaming vector ?

gleaming vector Mar 1, 2019, 8:23 PM

#

uhm

#

i dunno

bold hatch Mar 1, 2019, 8:26 PM

#

@gleaming vector haha no worries ill try to research it. Not like its for money anyways, just a student project

thin stratus Mar 1, 2019, 8:26 PM

#

ListenServer and DedicatedServer :P

#

Not P2P

bold hatch Mar 1, 2019, 8:28 PM

#

Yeah ill read up those in the documentation. Im just working for squares and circles anyways

thin stratus Mar 1, 2019, 8:29 PM

#

Make sure to read my compendium ;)

#

Pinned to this channel

bold hatch Mar 1, 2019, 8:33 PM

#

Yessss i will

#

also, maybe one last question, does it all work with blueprints or will i have to dive into C++ code?

fossil spoke Mar 1, 2019, 8:47 PM

#

If you want a Dedicated Server you will need to build that from source code. Bluprint only projects do not have the ability to create a Dedicated Server executable for the final packaged build.

#

But its perfectly doable to write your entire game in Blueprints.

gleaming vector Mar 1, 2019, 9:08 PM

#

when it comes to multiplayer, I do not recommend using only blueprint

#

you can achieve what you want to do, but it's much harder than writing C++ code

#

and there are more features available on the C++ side than the blueprint side

fossil spoke Mar 1, 2019, 9:13 PM

#

Totally agree.

#

I certainly recommend C++ over BP if you have those skills.

bold hatch Mar 1, 2019, 9:32 PM

#

Thanks guys, i do not, coming from unity i know a bit of C# but am not the great.

tribal solstice Mar 1, 2019, 10:15 PM

#

I can't seem to connect to a server after following the Epic Blueprint Multiplayer tutorial. Driving myself nuts over here. I changed the Max Sessions to a super high number, firewall seems fine. Any help would be super appreciated. Is there a working version of this project I can download?

gloomy flint Mar 1, 2019, 10:18 PM

#

how are you trying to connect @tribal solstice ? (what's the exact syntax you're using?)

tribal solstice Mar 1, 2019, 10:18 PM

#

I'll post some screens. One sec

#

📎 2.JPG

#

📎 1.JPG

#

📎 3.JPG

#

📎 display.JPG

#

There we go. I tried to trim the stuff I didn't need. All I want is players to appear in chat room with their name.

#

First screen is the 'Refresh Servers' macro

tribal solstice Mar 1, 2019, 11:08 PM

#

@gloomy flint Let me know if you need more info. Thank you!

gloomy flint Mar 1, 2019, 11:10 PM

#

Ah, I'm not sure I can help you with this 😦 Hopefully someone else will catch the error

tribal solstice Mar 1, 2019, 11:11 PM

#

@gloomy flint No worries, thanks for taking a look!

opaque forge Mar 2, 2019, 12:59 AM

#

What's the best way to replicate a really large string? Like a string the size of a web page source.

gleaming vector Mar 2, 2019, 1:19 AM

#

why?

#

if you need to do it once, just replicate it

#

otherwise, if it actually is a web page, just send the client the url

opaque forge Mar 2, 2019, 1:20 AM

#

Because things like ads and randomized things won't be consistant

gleaming vector Mar 2, 2019, 1:20 AM

#

?

#

is it static?

opaque forge Mar 2, 2019, 1:20 AM

#

No

gleaming vector Mar 2, 2019, 1:20 AM

#

hm

opaque forge Mar 2, 2019, 1:20 AM

#

It could be anything

#

It could be a literal youtube video

gleaming vector Mar 2, 2019, 1:21 AM

#

well

#

straight up, if it's a web page, you can't just replicate it

#

especially if it's like a youtube video

#

what you need to do is load page on clients

#

and hope they stay in sync

#

or write some code to force them to stay in sync

opaque forge Mar 2, 2019, 1:22 AM

#

But we can't account for everything a website might have

#

The theoretical approach is to run javascript on the game server and replicate all document changes

#

And ping the webserver itself for media

gleaming vector Mar 2, 2019, 1:23 AM

#

you can try that but you are doing a lot of replication you dont need to do

#

and you will lag your server down

opaque forge Mar 2, 2019, 1:24 AM

#

How do you recomend replicating a web browser than

#

In a way that is consisistant across clients?

gleaming vector Mar 2, 2019, 1:24 AM

#

I dont think you can

#

at least not perfectly

#

or, take a screenshot and send the image

#

but you wont get video

opaque forge Mar 2, 2019, 1:25 AM

#

That would be laggier

gleaming vector Mar 2, 2019, 1:25 AM

#

indeed

opaque forge Mar 2, 2019, 1:25 AM

#

Having the client run the rendering engine is a must

gleaming vector Mar 2, 2019, 1:26 AM

#

yes

#

and by nature of rendering the page on each client prevents you from syncing the the page perfectly

opaque forge Mar 2, 2019, 1:26 AM

#

Of course

gleaming vector Mar 2, 2019, 1:26 AM

#

unless you have full perfect control over the page

opaque forge Mar 2, 2019, 1:26 AM

#

But stuff like "I got this ad" should be synced

gleaming vector Mar 2, 2019, 1:27 AM

#

to my knowledge, you cannot sync that

#

unless you render it out on the server and send that render to the clients

#

because an ad is select at the point of rendering

#

at least for things like google ads

opaque forge Mar 2, 2019, 1:27 AM

#

Hmm

#

i wonder if I ran all javascript on the server, than propogated document changes to the client, it would work

gleaming vector Mar 2, 2019, 1:28 AM

#

yeah

#

you could do that

opaque forge Mar 2, 2019, 1:29 AM

#

But how do I replicate a really long string (the html)?

cyan light Mar 2, 2019, 4:18 AM

#

STUTTERING IS PRABABLY THE BIGGEST PROBLEM

#

oops

#

do not recommend html5 uis though

#

you can load large html5 files trivially locally

potent prairie Mar 2, 2019, 4:38 AM

#

how would I create a custom ini file that players can use to set dedicated server settings? Is there a wiki or any tutorial on this?

opaque forge Mar 2, 2019, 6:32 AM

#

@cyan light The problem is I'm pulling html from a webserver that can be literally any website (because it's a vr multiplayer web browser).

covert garden Mar 2, 2019, 8:20 AM

#

how to replicate name's player to text render on head pawn?

hoary shell Mar 2, 2019, 8:53 AM

#

i am using the default networking

#

Movement works fine

#

but i am getting errors in the logs and the bullets are not replicating

#

LogLoad: Took 0.066939 seconds to LoadMap(/Game/Maps/UEDPIE_1_Port)
LogNet: Client netspeed is 10000
LogNet: Join request: /Game/Maps/Port?Name=Mainframe-A0ED2A3B42D8DB5D5F495D994D89E761?SplitscreenCount=1
LogOnlineSession: Warning: OSS: No game present to join for session (GameSession)
LogNet: Join succeeded: Mainframe-A0ED2A3B42
LogOnlineSession: Warning: OSS: No game present to join for session (GameSession)
LogOnlineSession: Warning: OSS: No game present to join for session (GameSession)
LogNet: World NetDriver shutdown IpNetDriver_16 [GameNetDriver]
LogNet: DestroyNamedNetDriver IpNetDriver_16 [GameNetDriver]

#

What is now happening with the GameSession

#

Ok still sort of having that problem but now, I can see the projectile if the server fires it - and i see it on the client

#

the client is not doing it at all, so i guess my onFire trigger is not being replicated properly,

#

BUT the projectile is not moving but just appearing so i guess somehow its not being made moveable

#

yep that is what it is

#

PIE: Warning: Mobility of /Game/Maps/UEDPIE_2_Port.Port:PersistentLevel.FirstPersonProjectile_C_24 : StaticMeshComponent0 has to be 'Movable' if you'd like to move.

#

ok Its not doing the correct thing, Just wondering if there is some default code that is hard coding the projectile, i have changed it in the character BP but not elsewhere

#

ah! gotit

#

I havent replicated my onfire command

fluid flower Mar 2, 2019, 9:20 PM

#

hey guys, I'm trying to get dedicated servers working on steam but having no luck so far. Has anyone managed to do get dedicated server sessions running through steam? If so, any good resources on it? thanks!

tribal solstice Mar 2, 2019, 11:08 PM

#

@fluid flower Looking for the same thing myself. Have you found the Dedicated Server wiki (https://wiki.unrealengine.com/Dedicated_Server_Guide_(Windows_%26_Linux)) ?

#

I think it's just a matter of combining that method and adding a Steam Online Subsystem, which is covered in the Epic Multiplayer Blueprints tutorials. I had trouble getting it to work but just figured it out, so feel free to ask me questions and I'll help as best I can

fluid flower Mar 2, 2019, 11:23 PM

#

Thanks for the link :), yeah I got a dedicated server running ( I think my name is mentioned in that article, I had no idea lol ) It's just the steam part that i'm having no luck with 😦

#

my players can host through steam sessions and join no problem, it's working great. But now I want to host an official dedicated server and want my players to see it when searching for sessions.

#

but everything I've tried so far never shows the dedicated server sessions, do you remember the session settings you used when creating it?

tribal solstice Mar 2, 2019, 11:51 PM

#

I haven't gotten Steam working with dedicated yet, but I'm working on it so I'll update you when I get somewhere

flint plover Mar 3, 2019, 4:33 AM

#

Ok guys, I'm done banging my head on the wall. Anyone here want to collaborate? I got a 1v1/3v3/5v5 MOBA I'm working on, and the alphas been pretty much done for awhile now, but I wanted to get a prototype online and I completely lack any experience with matchmaking and starting sessions.
Looking for someone who knows about gamesparks and aws dedicated servers. looking for a simple system that just search's for other players that are searching and connects them, no lobby (think a super cell game's style match making)

flint plover Mar 3, 2019, 5:19 AM

#

if i don't respond on this server message me directly

bronze stream Mar 3, 2019, 6:00 AM

#

Hey there. I've spent the past couple of days working my way through UE's source and documentation in hopes to find out how replays function under the hood and despite having hardly any cpp nor UE knowledge I've managed to work my way through to a point where I understand it mostly, however I am now stuck at a point where I dont know how to continue. The way I understand it, "ReplayData" is pretty much the entire network stream that you’ve received from the server, would that be correct?

thin stratus Mar 3, 2019, 9:34 AM

#

@flint plover That system is expensive, I hope you are aware of that

#

GS changed their pricing, if your game isn't live yet it's most likely affected.

#

And the session stuff needs GameLift, not AWS. And GameLift is also quite expensive.

#

@bronze stream Given the lack of documentation, not a lot of people used the replay system or even know about it.
Might be tough getting an answer here.

fleet viper Mar 3, 2019, 1:43 PM

#

i remember seeing a article about that on the forums and how to use it

#

(replay system)

fluid flower Mar 3, 2019, 2:23 PM

#

i've got the basics of the replay system working if thats what you want, how the internal stuff works: no idea

#

has anyone encountered the 'incompatible_unique_net_id' error as of 4.20 i think? We're using steam and tried connecting to our own dedicated servers, and even that is not working anymore unless we turn steam off on the clients 😦

worthy perch Mar 3, 2019, 2:51 PM

#

If I replicate an int32 with a value of 0, will that have a netbandwidth of less than 4 bytes or will it still be 4 bytes?

winged badger Mar 3, 2019, 2:51 PM

#

4 bytes, value doesn't matter

#

the int32 type is serialized

#

and client unpacking that value needs to know exact number of bits it contains

worthy perch Mar 3, 2019, 3:14 PM

#

Alright, thanks.

flint plover Mar 3, 2019, 4:13 PM

#

@thin stratus

holy shit its exi replying to me
2.what would be a more practial way to approach what I'm looking for then? I assumed AWS and gamelift were pretty much the same thing lol

thin stratus Mar 3, 2019, 4:14 PM

#

AWS is just the "static" Servers

#

You set one up and you can install you stuff on it.

#

GameLift utilizes AWS but has the whole scaling stuff with it

#

So you basically tell them " Use that Server Tier and start my build on it."

#

It will then create instances of that ServerTier and host your Servers on them, as well as kill them again if no one plays.

#

But that all doesn't come for free.

#

The only other Service that I know of is PlayFab

#

They have that all in one package, however utilize Azure

#

(Cause well Microsoft owns PlayFab)

#

They take the default Azure Server Costs + 10% i think

#

Just for the Server Hosting

spare glade Mar 3, 2019, 4:16 PM

#

Gamesparks is not looking so good in pricing for me 🤔

flint plover Mar 3, 2019, 4:16 PM

#

I've heard and looked into playfab but their pricing seems to be about the same

thin stratus Mar 3, 2019, 4:16 PM

#

GameSparks is shit now after the update

#

They basically kicked out all Indies

spare glade Mar 3, 2019, 4:16 PM

#

having to contact them atm to get my license details otherwise throwing them out the window

#

yeah they raised the price on indies and lowered the price on BIG games

#

Been talking to one of the engineers over at https://heroiclabs.com/ , and they seem to have a good thing going, way more customizable since ur hosting it urself, so you dont have to pay per user and ur paying for the server price anyways gamesparks wouldve charged

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

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

thin stratus Mar 3, 2019, 4:19 PM

#

We stick with PlayFab now

#

I need to to work atm, not to be customizable

#

But that's just a per project argument

flint plover Mar 3, 2019, 4:19 PM

#

man, kinda depressing, I got close to getting done then looked into the prices of even releasing a game on diffrent marketplaces, plus the server costs, and its like... such a buzz kill

spare glade Mar 3, 2019, 4:19 PM

#

for the long term big project tho its a good idea, but for small projects, i wouldnt recommend it exi is right about that

thin stratus Mar 3, 2019, 4:20 PM

#

Well, Golden Rule: Don't do games with complex hosting when you can't easily afford it.

#

Small or Single Dev Teams should stick to ListenServers or allow players to host their own Dedi Servers.

flint plover Mar 3, 2019, 4:20 PM

#

i assumed that the scaling servers would remedy that

spare glade Mar 3, 2019, 4:21 PM

#

my question is WHERE IS ALL THE BACKEND DOCUMENTATION, XD i just want some guides or example from any1 really doesnt have to be epic, of building backends, would like to see how others achieve it

thin stratus Mar 3, 2019, 4:21 PM

#

The scaling servers are the expensive thing

flint plover Mar 3, 2019, 4:21 PM

#

listen serves wouldn't work i have a feeling as it might allow the host to cheat

thin stratus Mar 3, 2019, 4:21 PM

#

@spare glade

Backends aren't UE4 specific
Backends are usually cut to a project

#

If you want to know how to do a backend, here:

Use a MongoDB on selfhosted Server.

#

That's basically it. GameSparks is just a MongoDB

#

Then you need to write an API in e.g. NodeJS that talks to the MongoDB and listens for requests.

#

You then send the requests from UE4 to the NodeJS Server and that modifes the MongoDB or returns stuff

#

@flint plover Correct, Listen and DedicatedServers allow cheating.
The only way to not allow cheating is by hosting the DedicatedServer yourself, away from players

#

And that is infact expensive

#

So if you start a project with a relatively small budget, you might not want to make a game that requires this

spare glade Mar 3, 2019, 4:24 PM

#

What kind of Game were you looking at making for the backend @flint plover

thin stratus Mar 3, 2019, 4:24 PM

#

Specially since I can guarantee you that you won't get hundret thousand players into your game, specially if it's paid.

flint plover Mar 3, 2019, 4:24 PM

#

its a 1v1/3v3/5v5 moaba

#

moba*

thin stratus Mar 3, 2019, 4:24 PM

#

So if you release a free game with that stuff and monitize it via microtransactions, you will have to pay the servers out of your own pocket until the game picks up

flint plover Mar 3, 2019, 4:25 PM

#

it was a free game, but i figured that ad mob might cover server costs

spare glade Mar 3, 2019, 4:25 PM

#

Rip gamesparks, wouldve been perfect for ya

flint plover Mar 3, 2019, 4:25 PM

#

yeah thats why i was all over it lol

#

i dont want to see it die, but it might have o get put on the shelf until i get more monopoly

spare glade Mar 3, 2019, 4:27 PM

#

i mean could start like a kickstart or something if it has a demand and you have the ideas and the right people look at it its a possible way

flint plover Mar 3, 2019, 4:28 PM

#

let me see if i can find my screen capture and ill show u a video from a few months ago

spare glade Mar 3, 2019, 4:28 PM

#

oooo yes plz 😛

flint plover Mar 3, 2019, 4:30 PM

#

https://drive.google.com/file/d/1ZzX53cG0McY5ia_ULISRlzCF-FbcotGd/view

Google Drive

Jan 29, 2019 1:05 AM.webm

#

thats the 1v1 map, i've fixed the homing on the lasers since this and tweaked alot of the numbers. i have a few other ship classes planned, ie 'tank' and 'assassin'. that one has a jump ability, speed boost, and shield system

#

its more of a 'mage class'

spare glade Mar 3, 2019, 4:33 PM

#

never seen a moba like that XD, im a big smite player, But hey develop it enough make it smooth and you can make it 😛

flint plover Mar 3, 2019, 4:33 PM

#

i wanted to take it in a new direction

spare glade Mar 3, 2019, 4:33 PM

#

you got the right idea of it tho just gotta take it far enough

thin stratus Mar 3, 2019, 4:33 PM

#

There is a Tetris Battle Royal. So why not a space 2D MOBA

flint plover Mar 3, 2019, 4:33 PM

#

old scool top down arcade/moba

spare glade Mar 3, 2019, 4:33 PM

#

mix & match games

flint plover Mar 3, 2019, 4:34 PM

#

i love galaga and LOL, thought i'd clash the two lol

#

oh, and they have the basic tele to home base ability mobas are known for lol

#

but everything's working multiplayer wise, took awhile but i got everything replicating fine and it honestly seems really fun, but i really dont want to allow cheating, i guess i could adopt a listen server at first and change it later right? maybe after its gotten on its legs and can pull in enough to cover its own server costs?

spare glade Mar 3, 2019, 4:44 PM

#

i mean name a scenario of where they would cheat

flint plover Mar 3, 2019, 4:46 PM

#

I honestly don't know how to myself. But I've read that if players host servers it give them auth to change stuff on their end?

#

keep in mind Im pretty much a noob here on netowrking

spare glade Mar 3, 2019, 4:46 PM

#

ok ill throw out a few, and tell you why they couldnt and how you would stop it

flint plover Mar 3, 2019, 4:46 PM

#

k

thin stratus Mar 3, 2019, 4:46 PM

#

You can't stop it if they selfhost

#

Easy as that

flint plover Mar 3, 2019, 4:47 PM

#

thats what i thought

thin stratus Mar 3, 2019, 4:47 PM

#

The Server has the Autority. The Server decides if Damage is Dealt, if a Player is at Location X, if an Ability is on Cooldown or not

#

If you let Player host their own Servers, they can adjust that

#

Even your backend is basically unsafe at that point

#

Cuase the Server is the one sending requests to adjust the backend

flint plover Mar 3, 2019, 4:48 PM

#

so they have axcess to the api codes too?

thin stratus Mar 3, 2019, 4:48 PM

#

If Players host their own servers they can submit requests like "I won 5000 matches"

#

At that point yeah

#

You def have to host a DedicatedServer away from Clients

spare glade Mar 3, 2019, 4:48 PM

#

In Rocket league, they have a client that allows you to change ur skins to anything in game

The Server overall has ownership of everything that runs on its end, but the client it cant control. so the client could change anything they want on their end to look cool but the server would only know and see the car has all the default skins and stuff, and every other player would only see what the server knows, because clients dont communicate with eachother

To prevent this you need a local anticheat to make sure files arnt changed locally and require it be on by the server or else kick that player

thin stratus Mar 3, 2019, 4:48 PM

#

Otherwise you can just stop caring about competetive at all

#

@spare glade That all stops if you let players host locally.

spare glade Mar 3, 2019, 4:49 PM

#

yes, I always refer to dedicated servers, local servers are a bad idea, unless its a small game thats suppose to be locally hosted

#

for honor found this out very soon

#

XD

flint plover Mar 3, 2019, 4:50 PM

#

yeah. idk i guess it's going on a shelf as sad as it is, cant afford servers myself, i barely make rent DX

spare glade Mar 3, 2019, 4:50 PM

#

local party games between friends are alright but stranger ones over the internet randomly selecting enemies and partying with friends need to be dedicated

#

🤔

#

its a harsh world out there in the world of networking

flint plover Mar 3, 2019, 4:51 PM

#

they were right btw, stick to singleplayer for your first game XD just a sidenote

#

I've learned so much on this adventure though, so f it

spare glade Mar 3, 2019, 4:53 PM

#

https://firebase.google.com/pricing/

Firebase

Get started with Firebase for free, and scale worldwide to millions of users, paying only for what you use.

#

Firebase would be a good option if ur game is mobile

#

You could run a realtime session

#

would take a little more work setting all that up but very possible

#

Realtime sessions arnt ue4 sessions so remember that 😛

#

maybe start a youtube talk about ur development process or crowd fund and You could probably pay for your firebase and more then have ads and that will actually get you some more to grow the game, Just gotta use all ur options up till you get to ur final destination of self sustaining

flint plover Mar 3, 2019, 4:58 PM

#

true

spare glade Mar 3, 2019, 4:58 PM

#

https://sellfy.com/p/fc9C/ There is a kit for it but pricey

flint plover Mar 3, 2019, 4:59 PM

#

I've thought of crowd funding but i think that part of me doesnt think people will even dig the idea let alone throw money at it and make a demand

spare glade Mar 3, 2019, 5:01 PM

#

Could always contact the plugin maker ik sometimes for advertisement later on in ur game or paybacks(rarely) the would do for if ur game shows potential which i think a little more polish and maybe could get there to get that

#

https://www.youtube.com/channel/UCRQowuKOwqeKiva-UZkpzzg
I think beefalo got some back when, whenever we were talking

YouTube

Beefalo Bart

Small but Growing channel. I want to provide unique and honest reviews on all sorts of things. Some of the topics covered is, guns, games, and so much more. ...

bronze stream Mar 3, 2019, 5:09 PM

#

@thin stratus Yeah I feel that response a lot, exactly my feelings, unfortunate

smoky ore Mar 3, 2019, 9:02 PM

#

so. sorry if this sounds odd. but if someone else is using the spacewar appId to make an online game, and they're hosting a session as well, would unreal try to connect to that session even if they're two completely different games? me and my friend who was testing our game kept noticing we were trying to join another persons session (we found out they're an unreal dev, keeping their name a secret for privacy concerns)

thin stratus Mar 3, 2019, 9:33 PM

#

@smoky ore You receive sessions but they should be filtered

#

So they won't appear in your serverlist

smoky ore Mar 3, 2019, 9:34 PM

#

I don't have a server list available, it'll just try to join the first available session.

thin stratus Mar 3, 2019, 9:36 PM

#

Same thing

flint plover Mar 3, 2019, 9:36 PM

#

@exi (off current topic XD) so, would it be way cheaper to host a small scale mmo compared to the moba style i wanted to do before? because I had been looking into spatialOS and like the look for something of that nature

smoky ore Mar 3, 2019, 9:38 PM

#

So it's no big deal then? Just a weird quirk with the find/join/create session thing?

#

im just concerned that they somehow got access to a packaged game that should only be between friends is all

thin stratus Mar 3, 2019, 9:41 PM

#

Only sessions. Not your game.

#

@flint plover SpatialOS is not free though either.

smoky ore Mar 3, 2019, 9:46 PM

#

So... they may not have access to the game. but they can still host sessions? Sorry i'm a bit confused with what you're trying to say.

flint plover Mar 3, 2019, 10:16 PM

#

@thin stratus right, but it'd be cheaper like that regardless of who i use though right?

grand kestrel Mar 4, 2019, 12:10 AM

#

@flint plover @thin stratus spatials pricing still can't be gauged prior to use, they're working on it

#

Their new gdk revolves around the fact that most games don't start out needing spatial and their progress is solid so maybe worry about having a game first though I guess you're getting close

gleaming vector Mar 4, 2019, 1:12 AM

#

spatial is very hard to price

#

it's not cheap

#

i was quoted around $1.20 per player

#

you basically aren't going to find free or cheap multiplayer

#

if you want to do anything beyond simple local mp or classic dedicated server hosting, you should have a funding plan

#

and even with the classic dedicated server plan, you need to have official servers

#

as you can't guarantee users will be able to spin up enough server capacity for as many players may play

#

(something i've seen twice now on projects I've worked on)

fleet raven Mar 4, 2019, 1:16 AM

#

just have players host listen servers, free multiplayer achieved

#

there's no need for all this cloud stuff outside of official competitive things

gleaming vector Mar 4, 2019, 1:18 AM

#

i disagree

#

users these days expect to just be able to play games

fleet raven Mar 4, 2019, 1:18 AM

#

well they are with this setup

#

I guess it depends on the game

gleaming vector Mar 4, 2019, 1:18 AM

#

and the user's network setup

#

nat punchthrough needs a cloud service

#

or at least a remote service

fleet raven Mar 4, 2019, 1:18 AM

#

a very simple one compared to actually hosting the servers though

worthy oak Mar 4, 2019, 1:20 AM

#

Hey everyone having a weird prpblem (thats likely me just forgetting sometjing) Im trying to spawn health/ammo pickups when someone dies. The logic is working fine on the server/host but its not making it to clients. What am I doing wrong?

#

📎 unknown.png

#

📎 unknown.png

#

also tried it with multicast

fossil spoke Mar 4, 2019, 1:26 AM

#

Those images are to small man

#

Cant read anything

worthy oak Mar 4, 2019, 1:26 AM

#

apologies, one moment

#

📎 unknown.png

#

These are being called in the event point damage

fossil spoke Mar 4, 2019, 1:27 AM

#

Its probably being Destroyed before it gets the call.

worthy oak Mar 4, 2019, 1:27 AM

#

huh

fossil spoke Mar 4, 2019, 1:28 AM

#

📎 Capture.JPG

#

Your destroying the Actor immediately after its queued a Multicast RPC

#

The Client version of the Actor is probably being destroyed before it gets that RPC

worthy oak Mar 4, 2019, 1:29 AM

#

yep looks like thats exactly the issue

fossil spoke Mar 4, 2019, 1:29 AM

#

You should have a Manager class that handles Spawning instead of trying to get the Object itself to do it

worthy oak Mar 4, 2019, 1:30 AM

#

Gotcha ok. Thank you

tribal solstice Mar 4, 2019, 2:17 AM

#

can you not load a stream level with a listen option on 'Create Session'?

trim oriole Mar 4, 2019, 3:29 AM

#

hello every one i would like to ask for some help im trying to add health as a variable health and is dead but well adding it to mycharacterBP i found myself looking for how to replicate it and get authority but cant get it to work had an easier time getting a full working server with no health so im stuck im looking for any help with the BP part of this how do i add health and then server check it an links or picture would help its multiplayer as well so it needs to have that authority node just not sure how to use it for health

dark edge Mar 4, 2019, 3:40 AM

#

If the health is only ever changed on the server and is replicated, it should work. How are you applying damage?

#

@worthy oak in Gamestate or Gamemode, make an event CharacterIsAboutToDie and pass it the player character and location. Then you can do stuff like spawning pickups and adding to scores and whatnot. Make sure that anything that needs to know about the character actor gets to fire before the actor is destroyed. I'd recommend having a death animation and fade out instead of just instantly destroying the actor.

crystal leaf Mar 4, 2019, 3:44 AM

#

The PlayerController here should just be GetPlayerController as it is denoting the client that should be the server, correct?

worthy oak Mar 4, 2019, 3:44 AM

#

@dark edge Ah ha makes sense. Thank you! 😄

crystal leaf Mar 4, 2019, 3:45 AM

#

https://i.imgur.com/Ad1nHEk.png

Imgur

dark edge Mar 4, 2019, 3:45 AM

#

@crystal leaf what are you asking?

crystal leaf Mar 4, 2019, 3:45 AM

#

What exactly the node Player Controller is asking for, and what it means.,

dark edge Mar 4, 2019, 3:46 AM

#

Sorry your pic took a minute to show up. Yeah just get player controller, or owning controller, or self if that's in the controller.

crystal leaf Mar 4, 2019, 3:47 AM

#

👍

#

What's the best way to test this?

#

Open two stand-alone games?

o I can't,

How is it I can go ahead and test this?

Do I have to package it and run it twice each time?

dark edge Mar 4, 2019, 3:49 AM

#

You using steam?

crystal leaf Mar 4, 2019, 3:50 AM

#

No,

dark edge Mar 4, 2019, 3:50 AM

#

2 standalones should do it

crystal leaf Mar 4, 2019, 3:50 AM

#

I tried to open a second one and it just closed the first,

#

is there an option I've missed?

dark edge Mar 4, 2019, 3:51 AM

#

Launching from editor or no?

#

just set it to be 2 players and it should launch 2 standalones from editor

#

but if it doesnt, just right click the project file and hit launch game

crystal leaf Mar 4, 2019, 3:52 AM

#

Yeah from editor, I'll try the right-click thing rn

#

also failing to run 2 copies of it,

#

interesting

#

Got it, I had to select play in viewport

#

it then denotes the viewport as the server and other windows it opens as Client X

dark edge Mar 4, 2019, 4:03 AM

#

Yeah in PIE it'll auto connect them

#

but once they're up you should be able to just type open MapName in console to break away from the server to test connecting

#

No matter what you should be able to launch many instances of the game from the project file though, I've had like 4 up at once before

crystal leaf Mar 4, 2019, 4:08 AM

#

oh I don't think I tried clicking it multiple times

#

anifacepalm

#

if I load it from the file itself they aren't auto-connected yeah?

dark edge Mar 4, 2019, 4:12 AM

#

Yeah they're just 2 instances of the game

trim oriole Mar 4, 2019, 5:09 AM

#

its a dedicated server so server and client server handles health but just not sure how to place the nodes in for my health to be handled by the server iv added it to playercontrollor but its not server wide its only working for client not showing to others and not checking or no authentication to see if its what there health really is real time just cant get the nods right and where to put the health for my fps and how to do it correctly for online server hosted to clients

timber anchor Mar 4, 2019, 7:03 AM

#

@crystal leaf Man can i ask you what are you using for creating the multiplayer session?

#

Uworks? or just the standard BP system with the plugins?

crystal leaf Mar 4, 2019, 7:04 AM

#

BP, no plugins

#

Should I be using plugins?

timber anchor Mar 4, 2019, 7:05 AM

#

In base of you want to do

#

I mean

#

if you want a steam integration

#

AdvancedSession it's quicker and easier with BP

crystal leaf Mar 4, 2019, 7:07 AM

#

Not looking for steam integration, (I keep hearing everyone talk about this, is it way easier??)

#

Each client has the ability to be a host, and the other players can hook up to him.

timber anchor Mar 4, 2019, 7:07 AM

#

Yes, you're doing Listen Server

crystal leaf Mar 4, 2019, 7:08 AM

#

^

timber anchor Mar 4, 2019, 7:08 AM

#

If you're not looking up for the steam integration than you're doing fine 😄

#

I was asking because everyone do everything different in multiplayer projects

#

and hearing from different people what they're using/thinking to do it's always a way to understand new things

crystal leaf Mar 4, 2019, 7:09 AM

#

I appreciate it immensely, I'm starting to feel lost in the sauce over here just trying to get the games to connect

#

just trying to take this one step at a time

timber anchor Mar 4, 2019, 7:10 AM

#

Don't worry! If i can suggest you something, try to look up on youtube, there are different tutorials, even without the steam integration 😄

crystal leaf Mar 4, 2019, 7:10 AM

#

been looking at a few, atm the http://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf has been very helpful

timber anchor Mar 4, 2019, 7:11 AM

#

Best "Guide" (It's not a guide but you can call it like this xD) so far

#

I mean you can understand a lot from him

crystal leaf Mar 4, 2019, 7:35 AM

#

Is this still the accepted way to do this?

#

https://i.imgur.com/9hLNo9X.png

Imgur

#

Seems hacky and doesn't give me a way to tell if the connection went through or not.

real yacht Mar 4, 2019, 7:38 AM

#

yes

crystal leaf Mar 4, 2019, 7:42 AM

#

How do I check the applicable ip to connect to within my machine or should i use 127.0.0.1?

worthy perch Mar 4, 2019, 7:43 AM

#

I thought "Execute Console Commands" nodes don't work in Shipping.

crystal leaf Mar 4, 2019, 7:44 AM

#

Then that would be a serious flaw.

worthy perch Mar 4, 2019, 7:45 AM

#

You can use ClientTravel if you want to connect to a server.

crystal leaf Mar 4, 2019, 7:45 AM

#

https://i.imgur.com/5fLVlfp.png
https://i.imgur.com/kGtzKaX.png
?

Imgur

worthy perch Mar 4, 2019, 7:46 AM

#

I'm not sure if it's exposed to BP, but it's this: https://api.unrealengine.com/INT/API/Runtime/Engine/GameFramework/APlayerController/ClientTravel/index.html

APlayerController::ClientTravel

Travel to a different map or IP address.

crystal leaf Mar 4, 2019, 7:46 AM

#

ahhh,

#

I'm seeing a LOT of people using cpp within this channel.

#

Should I not be trying to use BP for a multiplayer game?

worthy perch Mar 4, 2019, 7:47 AM

#

I think a lot of people use BP for multiplayer, so I guess it's fine.

#

At the worst case, you just expose some native functions.

#

I think ServerTravel was one of the ones that needed to be exposed, but I think they added that to BPs.

crystal leaf Mar 4, 2019, 7:58 AM

#

Not seeing a Server Travel Either

winged badger Mar 4, 2019, 8:08 AM

#

its an ExecuteConsoleCommand node

#

for server travel

#

and doing networking in c++ vs. BP is more different then just exposing a few functions

#

some things (like OnRep/RepNotify) doesn't behave the same in c++ and in BP

#

in BP its not a replication, but a property setter callback

crystal leaf Mar 4, 2019, 8:12 AM

#

ooo

winged badger Mar 4, 2019, 8:12 AM

#

also, because of limitations of what you can do with structs in BP, using custom serialization is impossible as far as i know

crystal leaf Mar 4, 2019, 8:12 AM

#

if I learned a tad bit of cpp and made a couple custom nodes it might be easiest then

winged badger Mar 4, 2019, 8:13 AM

#

i find BP network code difficult to follow, its just too bulky

#

its fine for something small, but when you have to network 20 functions... ouch

crystal leaf Mar 4, 2019, 8:14 AM

#

it's the easiest way I find to follow the game code though, I would learn cpp if there was a handy way to understand and follow all the different shortcuts (I forget the technical name for them) but there isn't one that I have found.

#

My thing is something small, I just don't have a ton of understanding.

#

It's nothing like a 16+ person FPS, it's a little four person turn based thing

winged badger Mar 4, 2019, 8:16 AM

#

the most annoying thing so with BP replication for me, is if you have a RepNotify variable, and you set it locally on client, OnRep will execute

crystal leaf Mar 4, 2019, 8:20 AM

#

Already beyond me,

#

Haven't even gotten the clients to connect.

crystal leaf Mar 4, 2019, 8:43 AM

#

How can I test that btw?

#

Everytime I open it up they automatically connect.

And if not, how do I get the IP it's opened on so I can input it to connect to?

thin stratus Mar 4, 2019, 8:49 AM

#

There is a boolean in the play advanced settings that you can toggle off

#

Then they don't connect by default

#

@crystal leaf

#

If you test in editor, then the IP is 127.0.0.1

#

So localhost

crystal leaf Mar 4, 2019, 8:54 AM

#

I'll look for it

#

I've been trying localhost this whole time, I assume that their auto-connection is stopping it from triggering

#

ty

#

p sure their still-automatically connecting.

#

This is still triggering twice on start

#

https://i.imgur.com/iOaChVn.png

Imgur

thin stratus Mar 4, 2019, 9:07 AM

#

That will trigger twice anyway

#

Cause each instace, even if not connected, is on that map

#

The difference is what is printed in front of it

#

If it prints "Server..." and "Client..."

#

Then they are connected

#

@crystal leaf

crystal leaf Mar 4, 2019, 9:08 AM

#

hmm. mmmk

crystal leaf Mar 4, 2019, 9:28 AM

#

This should be fine and work exactly as the normal console command would yes?

#

https://i.imgur.com/WmmZ2Ta.png

Imgur

thin stratus Mar 4, 2019, 9:31 AM

#

Yop

crystal leaf Mar 4, 2019, 9:32 AM

#

https://i.imgur.com/qfsi4ja.png

Imgur

#

https://i.imgur.com/uqIjH5E.png

Imgur

#

So I click Host

#

And they both give me the same message,

#

There is no Server: Successs... or Client: Success... Ect

#

Any idea?

thin stratus Mar 4, 2019, 9:51 AM

#

They are both Standalones, so not connected at the Start. You can see that on their window title bars.
The Print Message showing up on both is just the Editor working in a Single Instance/Core. This won't happen if you Rightlick the UPROJECT file and hit "Launch Game" twice.

#

If that print message means that you create a session, then I don't see what the issue is?

#

Creating a Session is just information about the Server/Client. After you created the Session, you need to open the Map with ?listen option

#

And then afterwards search for sessions on the player that should connect

mellow cipher Mar 4, 2019, 10:07 AM

#

When you join a server it automatically adds your name as an option to the end eg NewMap?Name=DESKTOP-GQIB0VT

Is there a way to override what the Name = on connect?

#

Trying to set it myself doesn't seem to work

thin stratus Mar 4, 2019, 10:12 AM

#

In Blueprints, don't think so

#

Are you joining a Server with the JoinSession Node?

#

@mellow cipher

mellow cipher Mar 4, 2019, 10:15 AM

#

Nope just the open command

#

I could use another option afterwards but since the gamemode is already passing the Name to SetPlayerName() I would rather just take over that

shut surge Mar 4, 2019, 11:27 AM

#

what's better writing replication - blueprints or c++ ?

ivory portal Mar 4, 2019, 1:58 PM

#

What happened to ReadyToStartMatch in GameMode?

thin stratus Mar 4, 2019, 1:59 PM

#

Should still be there

#

Make sure you have a GameMode child

#

Not GameModeBase child

#

@ivory portal

ivory portal Mar 4, 2019, 2:00 PM

#

oh thanks

#

Was indeed using Base

thin stratus Mar 4, 2019, 2:02 PM

#

Make sure to also use GameState instead of GameStateBase then

#

Otherwise it won't work

#

@ivory portal

mellow cipher Mar 4, 2019, 2:15 PM

#

If anyone knows how to override the name parameter on connect I will love you forever

ivory portal Mar 4, 2019, 3:14 PM

#

Yeah thanks!

#

Does beginplay wait for start match on all objects or only on player objects?

#

At the moment my tests say after start match

#

but I'm always reluctant because of the speed of localhost

#

ah no, just tested it without single process. It seems that beginplay on server-owned objects already does beginplay

thin stratus Mar 4, 2019, 3:33 PM

#

Most likely already does beginplay yeah

twin minnow Mar 4, 2019, 4:47 PM

#

does gamemode->getnumplayers and getnumspectators update on its own?

sterile crown Mar 4, 2019, 5:04 PM

#

Can someone give me a rundown on the current status of World Origin Shifting for MP? It is required when using World Composition correct? Is it just a few simple checkboxes in the engine? Does it require a dedicated server?

thin stratus Mar 4, 2019, 5:59 PM

#

Doubt it requires a DediServer

#

However I only used it in SP games

winged badger Mar 4, 2019, 8:04 PM

#

@twin minnow it will give the correct number when executed, however the pin from blueprint exec functions changes only when an exec wire runs exec through it

#

Its like that for all non pure BP functions (pure ones are evaluated whenever exec runs through anything they are connected to)

tribal solstice Mar 4, 2019, 8:18 PM

#

I'd like to store player info in an online database and GET and POST to it using the VaREST plugin. Can anyone recommend a solid database with web app interface solution that is free/cheap?

#

Or steer me in the right direction if there is a better solution?

thin stratus Mar 4, 2019, 8:24 PM

#

It's actually quite easy to write your own NodeJS app with a MongoDB in teh background

#

You can then host that for like 5€ a month on a DigitalOcean droplet

#

@tribal solstice

#

That NodeJS app will listen for GET and POST requests

#

and modify the mongodb

#

There are probably youtube tutorials that get you fully started

tribal solstice Mar 4, 2019, 8:28 PM

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@thin stratus Perfect! Thank you so much. Also thanks a million for your network compendium. I'm trying to reverse engineer my game after following the 'Blueprint Multiplayer' tutorials from Epic using your guide.

thin stratus Mar 4, 2019, 8:28 PM

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Ah the BLueprint Multiplayer tutorial

tribal solstice Mar 4, 2019, 8:28 PM

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Infamous

thin stratus Mar 4, 2019, 8:28 PM

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Yeah sorry that still exists

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A few years back and Epic would've actually cared :P

tribal solstice Mar 4, 2019, 8:29 PM

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It's okay, at least it got me up and running for the most part. Thankfully you wrote your guide.

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Actually, while you're here, I'd like to ask: I have a very simple online game that's text-based (think MUDs) so all I really need is player names and their text in 'chat rooms'. Where's the best place to store and retrieve player names and all that? GameState?

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Cause as of now there's a lot of logic happening in the PlayerController (from tutorial) but from what I understand from your guide that's bad practice

thin stratus Mar 4, 2019, 8:32 PM

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PlayerNames are saved on their PlayerStates

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So each PlayerState has a "GetPlayerName" function

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To get your hands on all of them at once, you can use the PlayerArray of the GameState

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Information about a specific Player that everyone should be able to access -> PlayerState
Information about the match that everyone should be able to access -> GameState
Information and Logic about the match that is supposed to stay on the Server only -> GameMode
Information and Logic about a specific Player that only the Player and the Server should care about -> PlayerController
Information and Logic about a specific Character/Pawn -> Character/Pawn
UI stuff -> PlayerController/HUD/LocalPlayer(not exposed to Blueprints)

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@tribal solstice

tribal solstice Mar 4, 2019, 8:37 PM

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Thanks so much, man!

tribal solstice Mar 4, 2019, 9:03 PM

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Do I need to create a PlayerState blueprint or can I just pull info from the automatically generated one?

thin stratus Mar 4, 2019, 9:03 PM

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If you don't need additional info per player

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Then you can use the default one

tribal solstice Mar 4, 2019, 9:04 PM

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And I just do that with a cast to it and store a reference?

thin stratus Mar 4, 2019, 9:06 PM

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The Default PlayerState is already a PlayerState

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I mean there is no need to cast

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cause that's already teh class :D

tribal solstice Mar 4, 2019, 9:07 PM

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So if I wanted to grab a player's name to display in a chat room, which blueprint would I request the name in and using which node?

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I guess my question is if not using casting, how else do you get the reference of the Player Name from the Player State?

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The tutorial had us make a struc and store player name in there, which seems to make no sense at all.

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Ah... can't change PlayerState PlayerName in blueprints?

thin stratus Mar 4, 2019, 9:27 PM

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Yeah you can but really annoying to do so

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The GameModeBase (and so also the GameMode, depending on what you inherit from) has a "ChangeName" function

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You pass the PlayerController of the player which name you want to change

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Well it depends on how you grab the reference to a PlayerState

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Let's make a very easy example

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You want a Widget that shows all playerNames in a List

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So you would go into your Widget, add VerticleBox

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And then in your code "GetGameState->GetPlayerArray"

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Then "ForEach" on the PlayerArray

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On each of the Loops you call "GetPlayerName" on the element and use that to add a new custom TextWidget (that one you gotta create too) to the VBox

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You can also access teh PlayerState via Pawn, Character and PlayerController

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@tribal solstice

twin minnow Mar 4, 2019, 9:30 PM

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@winged badger what is an exec wire exactly?

thin stratus Mar 4, 2019, 9:32 PM

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I assume they mean the White Wire that comes from Nodes with White pins

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That's the Execution Wire that defines what gets executed in which order

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From left to right

twin minnow Mar 4, 2019, 9:33 PM

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Hmmm

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Because right now im trying to bind a function that calls getnumplayers in widget

tribal solstice Mar 4, 2019, 9:40 PM

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@thin stratus I see, thank you. So I have a dropdown box in a widget where players can choose a chat name, and I have this logic in there:

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📎 changename.JPG

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Does that look about right?

thin stratus Mar 4, 2019, 9:43 PM

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Kinda, keep in mind that Clients don't have access to the GameMode

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They need to RPC first

tribal solstice Mar 4, 2019, 9:49 PM

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Ah okay. So in the widget you'd select a name, and then that would call a RPC event to the server to change within the Game Mode?

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I'm still getting the hang of what an RPC is. That tutorial really has confused me more than it was worth I guess.

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📎 changename.JPG

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Is that closer?

thin stratus Mar 4, 2019, 9:58 PM

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Closer but wrong

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Widgets have nothing todo with multiplayer

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They aren't replicated

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Neither should they be

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So they also can't execute an RPC

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Cause there is no SErver version of this widget

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You have to call the RPC on a Client Owned Actor

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e.g. PlayerController, PlayerState, Character, Pawn

tribal solstice Mar 4, 2019, 10:04 PM

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I see, that makes sense. So 'On Selection Change' node would cast to PlayerController of owner and do an RPC to the server GameMode to change the name?

thin stratus Mar 4, 2019, 10:07 PM

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Yeah the RPC needs to be in the PlayerController

twin minnow Mar 4, 2019, 10:08 PM

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@thin stratus im currently using an rpc to use the gamemode functions but do i have to manually update the player and spectator counts or do they automatically adjust when a player state's spectator flag is changed?

thin stratus Mar 4, 2019, 10:08 PM

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I usually have a Function that returns the count

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On the GameState

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That just goes over the players and counts them based on their state

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The issue of updating then resolves itself

twin minnow Mar 4, 2019, 10:09 PM

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oh i see

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very nice thank u

thin stratus Mar 4, 2019, 10:09 PM

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Yus

tribal solstice Mar 4, 2019, 10:21 PM

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So I have this logic in my widget:

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📎 widget.JPG

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And this in my PlayerController:

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📎 PC.JPG

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Am I getting warmer?

thin stratus Mar 4, 2019, 10:28 PM

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Yop, perfect

tribal solstice Mar 4, 2019, 10:28 PM

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Awesome!

thin stratus Mar 4, 2019, 10:28 PM

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Plus points on using GetOwningPlayer :P

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Just make sure you actually add the Owning player when creating the widget hehe

tribal solstice Mar 4, 2019, 10:28 PM

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Thanks, man! Really appreciate all your help!

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What do you mean by add the owning player when creating the widget?

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Oh I think I understand

thin stratus Mar 4, 2019, 10:30 PM

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Define, Pass, etc.

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I can't English anymore

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alex

tribal solstice Mar 4, 2019, 10:31 PM

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📎 createwidget.JPG

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Like this? This is how I create the widget, which is nestled in another widget

thin stratus Mar 4, 2019, 10:32 PM

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Yeah

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Ultimately you need the first widget taht got created to have the PlayerController beind passed

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Which is why you most of the time place your UI code into the PlayerController

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Or LocalPlayer if you have access to C++

tribal solstice Mar 4, 2019, 10:32 PM

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Hmm, not quite following

thin stratus Mar 4, 2019, 10:33 PM

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This is how I create the widget, which is nestled in another widget

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That's fine

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But the "other widget" also has to get the "OwningPlayer" set

tribal solstice Mar 4, 2019, 10:33 PM

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So this is kind of confusing, but the first widget is a simulated OS environment. Then you double click an icon which opens the 'online' widget and chat room. The player is logged in to the server at this point

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but is offline while using the OS widget, if that makes any sense

thin stratus Mar 4, 2019, 10:33 PM

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The thing is

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Somewhere you are calling CreateWidget

tribal solstice Mar 4, 2019, 10:34 PM

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Right

thin stratus Mar 4, 2019, 10:34 PM

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NOT from inside another Widget

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Somewhere the first widget, the outer most has to be created and added to the viewport

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And that one has to have OwningPlayer beind passed too

tribal solstice Mar 4, 2019, 10:35 PM

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📎 originalwidget.JPG

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So this is the highest level in my level blueprint

thin stratus Mar 4, 2019, 10:35 PM

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Yus, there it's missing

tribal solstice Mar 4, 2019, 10:35 PM

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Copy that

thin stratus Mar 4, 2019, 10:35 PM

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Either you call "GetPlayerController0"

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And pass that

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Or you move that stuff into the PlayerController to begin with

tribal solstice Mar 4, 2019, 10:35 PM

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so even if the player is 'offline' for that widget creation it must have a 'Get Owning Player'

thin stratus Mar 4, 2019, 10:35 PM

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That stuff shouldn'T really be in the level

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Otherwise you always have to copy that into the next level again

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You don't have to

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But it's good practice

tribal solstice Mar 4, 2019, 10:36 PM

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Ah okay. So all widget creation should be within the PlayerController?

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Makes a lot of sense

thin stratus Mar 4, 2019, 10:36 PM

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You can argue if PlayerController, HUD Class or whatever

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But it's def not wrong to put it into the Controller

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E.g. On Begin Play, call a function "SetupUI"

tribal solstice Mar 4, 2019, 10:37 PM

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Okay great, and then it persists across Open Levels is what you're saying?

thin stratus Mar 4, 2019, 10:37 PM

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Just make sure you do a "IsLocalPlayerController"+Branch

inland pond Mar 4, 2019, 10:37 PM

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Having it inside the gameinstance is also okay?

thin stratus Mar 4, 2019, 10:37 PM

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Cause otherwise the Server Version of this will add a widget too

tribal solstice Mar 4, 2019, 10:37 PM

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I see

thin stratus Mar 4, 2019, 10:37 PM

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@inland pond Depends on why it's in there

tribal solstice Mar 4, 2019, 10:37 PM

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Thanks eXi

thin stratus Mar 4, 2019, 10:37 PM

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Widgets don't survive level changes

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So it would be cleared anyway

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even if it's in the GI

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So I would argue it should be in the PC

inland pond Mar 4, 2019, 10:37 PM

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Ahh okay thx ^^

thin stratus Mar 4, 2019, 10:37 PM

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Or at least not in the GI

tribal solstice Mar 4, 2019, 10:39 PM

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Got it

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So when creating widgets in the PlayerController, do you need to specify 'Get Owning Player' as well?

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or 'Self'?

rotund sapphire Mar 4, 2019, 10:54 PM

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i pass in self since 4.20 without that i got way too many ensures/errors in pie

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in PC you have no owning player btw

tribal solstice Mar 4, 2019, 10:55 PM

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do you do a 'IsLocalPlayerController' branch?

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Copy that, thanks Robert

rotund sapphire Mar 4, 2019, 10:57 PM

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player controllers exists both on client and server, so yeah you are better to be check the script runs on client side only

tribal solstice Mar 4, 2019, 10:58 PM

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copy that, thank you very much

tribal solstice Mar 4, 2019, 11:19 PM

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Should my 'Create Session' and "Find' and 'Join Session' logic all be in the PlayerController as well?

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Tutorial series told us to put that in the 'Server Selection' widget, but now with eXi's help I understand that it may not be correct to put logic like this in the widgets

true dagger Mar 4, 2019, 11:53 PM

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@balmy canopy meet @limber plaza

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I "helped" (not really) @limber plaza get his UE4 Steam multiplayer thing going in Docker.

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I know he's done some network coding and can probably help you get a grip on what you need to do.

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@limber plaza thanks for helping out mate appreciate it

limber plaza Mar 4, 2019, 11:54 PM

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Wave What up Phisix.

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NP! Yea Phisix feel free to message me about what you're trying to do. Sooner is better than later (got a business trip starting nex fri to the 18th so afk)

true dagger Mar 4, 2019, 11:55 PM

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@limber plaza I've told @balmy canopy you're happy to write all his networking code for him, for free, for the life of his game. Enjoy.

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;)

limber plaza Mar 4, 2019, 11:55 PM

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Ha

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Har d har har.

balmy canopy Mar 4, 2019, 11:57 PM

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Hahaha. @true dagger thanks. @limber plaza Hi. I'm just redoing my test project to see if I can get it working but I highly dought I will but let me just see before I bother you. Can I juat add you so I can find you easier when I need to?

limber plaza Mar 4, 2019, 11:58 PM

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absolutely!

balmy canopy Mar 4, 2019, 11:58 PM

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@limber plaza Thanks

limber plaza Mar 4, 2019, 11:59 PM

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GL ! 👍

true dagger Mar 4, 2019, 11:59 PM

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Awesome. Good luck @balmy canopy

balmy canopy Mar 5, 2019, 12:06 AM

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Thank you.

twin minnow Mar 5, 2019, 1:10 AM

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has anyone tried getting gamestate before?

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it's returning null for me even tho im doing this in a server rpc

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hi @winged badger i hope im not bothering you, but have u experienced this kind of issue before?

winged badger Mar 5, 2019, 1:18 AM

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how are you getting it?