#multiplayer | Unreal Source | Page 508

winged badger Dec 3, 2019, 12:27 AM

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hell you can take it to veryverbose even

lost inlet Dec 3, 2019, 12:38 AM

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well it seems the actor is getting a netguid just fine

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that's all that shows me

quiet wyvern Dec 3, 2019, 1:03 AM

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Hey im trying to run my dedicated server on a linux box how do i make this work?
Warning: STEAM: Failed to initialize Steam, this could be due to a Steam server and client running on the same machine. Try running with -NOSTEAM on the cmdline to disable.
I dont have a AppID yet, so im using the temp Dev one

timid moss Dec 3, 2019, 1:39 AM

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if im running a game with a dedicated server, how do i reload the map?

quiet wyvern Dec 3, 2019, 2:02 AM

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on the ds just call openlevel

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wait nvm

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this how im doing it

📎 Screenshot_8.png

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the delay is there to show scores but its 0.1 now while im in testing

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i had to destroy all actors cause it was causing a crash for some reason

rich ridge Dec 3, 2019, 5:43 AM

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Hi all,
Anybody have any idea in which order the below mentioned things are created

World
Game mode
GameState
Player controller
GameInstance

lost inlet Dec 3, 2019, 6:38 AM

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educated guess would be 5, 1, 2, 3, 4

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but a player controller won't exist until a player connects

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and each player on the server has one

rich ridge Dec 3, 2019, 6:39 AM

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@lost inlet why GameInstance first

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Why not world

lost inlet Dec 3, 2019, 6:39 AM

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pretty sure the game instance is a part of the engine initialisation

rich ridge Dec 3, 2019, 6:39 AM

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But GameInstance only exists at client side

lost inlet Dec 3, 2019, 6:39 AM

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you have the source code, you can look it up

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a server can have a game instance

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https://github.com/EpicGames/UnrealEngine/blob/bf95c2cbc703123e08ab54e3ceccdd47e48d224a/Engine/Source/Runtime/Engine/Private/GameEngine.cpp#L1034

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and as i guessed, game instance is a part of the engine init

rich ridge Dec 3, 2019, 6:41 AM

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@lost inlet cool bro

rich ridge Dec 3, 2019, 8:36 AM

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@thin stratus I was reading your compendium very seriously with word to word and deep meaning.
I have a questions.
First you mentioned APlayerState class should have information like name, score, ping ,ECT which other players can see.

The next you explain the APawn class which is actually a character or hero which a player is controlling. Here you said to have information like health, Mana ,etc.
So my main question is player health and Mana is visible to other players as well whether they are enemy or same team. So why have u suggested to put player health or Mana inside APawn class.

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@thin stratus is this because of design or just a practice which you find it to be more practical

thin stratus Dec 3, 2019, 8:41 AM

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That's actually just a designchoice per game.

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Properties should be relative to the class that use them.

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So generally the Pawn has its own Health data.

winged badger Dec 3, 2019, 8:41 AM

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and the health/mana are the properties of the Pawn

thin stratus Dec 3, 2019, 8:42 AM

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But if you have some weird setup where it makes sense to persists the data between switching pawns, then you could place it into the PlayerState.

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But generally speaking, Health/Mana is a "PawnState" thing

rich ridge Dec 3, 2019, 8:42 AM

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@winged badger they also represent the player state to other players

thin stratus Dec 3, 2019, 8:42 AM

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No, they represent the pawn's state

winged badger Dec 3, 2019, 8:42 AM

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there are 2 easy ways to display them to other players with them being on Pawn

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a WidgetComponent on a Pawn being one, PlayerState not having any trouble accessing its controller's possessed Pawn being the other

thick sleet Dec 3, 2019, 12:09 PM

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Can someone please help, I need to efficiently replicate float variable, that is computed from input on locally controlled pawn to other clients.
Intention was to let client set value of variable first locally, send value to server, set the variable and from server would be value replicated to other clients with replication condition "Simulated Only".
However, even locally controlled pawn with role Autonomous Proxy will get and set replicated value from server.

If value is sent from client to server via RPC and there multicast from server, where setting of value is skipped if pawn is locally controlled, everything works as expected.

Am I missing something?

fleet viper Dec 3, 2019, 12:59 PM

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Hey there ive got an really annoying bug in my customization system. Ive got a datatable which stores the skin and the materials per faction/row. I load them via a custom function and voila based on the selected faction it will return the mesh and the materials which i then plug into my cpp function. This cpp function changes two variables replicated with OnRep. The OnRep function then sets the mesh and the materials to my char. Somehow this doesnt work? Any ideas? (btw will provide screenshots etc. if you need them)

winged badger Dec 3, 2019, 1:55 PM

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@fleet viper i suspect your clients know what faction they belong to and could find the correct row on their own without additional replication

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then just load the mesh/set material independently

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@thick sleet i assume you concluded that owning client gets replication from server because its OnRep fires and you're doing this in blueprints

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in BP, OnRep is better described as a setter then replication callback (client sets its own replicated variable locally, and the OnRep still fires)

jolly siren Dec 3, 2019, 3:23 PM

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is the rpc doc page forwarding to chinese for anyone else?

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https://docs.unrealengine.com/en-US/Gameplay/Networking/Actors/RPCs

RPCs

Designating function replication across the network

fleet viper Dec 3, 2019, 3:35 PM

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@winged badger I actually found the error, when i cast to my soldier on client side it will fail because my get controlled pawn node returns null for some reason

📎 Desktop_Screenshot_2019.12.03_-_16.34.52.51.png

winged badger Dec 3, 2019, 3:36 PM

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you should also not have any game logic in the widgets ^^

fleet viper Dec 3, 2019, 3:37 PM

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i know i know haha

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im now trying to setup up a node in cpp which replaces the casting and just calls from the pc the change skin function

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but uhh yeah im getting weird errors

winged badger Dec 3, 2019, 3:38 PM

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@jolly siren not for me

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i guess you're special 😄

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i am pretty sure you replicated faction ID somewhere already

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not related to the mesh/material

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if you have, there is no need to replicate the information again

fleet viper Dec 3, 2019, 3:40 PM

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i acutally did exactly what you are suggesting

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note the "the cpp way"

📎 Desktop_Screenshot_2019.12.02_-_13.47.00.40.png

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@winged badger

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but i cant cast to soldier on client side

winged badger Dec 3, 2019, 3:42 PM

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i have no clue what the relation between soldier and BP_Soldier is

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the logic should definitely not be inside a widget

fleet viper Dec 3, 2019, 3:42 PM

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ill explain it a bit

winged badger Dec 3, 2019, 3:42 PM

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and you can do without the cast, especially if you only have a single skeletal mesh

fleet viper Dec 3, 2019, 3:43 PM

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I have to use casts

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i mean there is no other way of changing the skeletal mesh of my char

winged badger Dec 3, 2019, 3:44 PM

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GetComponentByClass<USkeletalMeshComponent>

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works from an Actor reference

fleet viper Dec 3, 2019, 3:44 PM

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yeah and still i have to get reference to my pawn

winged badger Dec 3, 2019, 3:45 PM

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but the logic to set that mesh/material should be inside the pawn

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not here

fleet viper Dec 3, 2019, 3:45 PM

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it isnt there

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this is just triggering the nodes to change the skin

winged badger Dec 3, 2019, 3:46 PM

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yeah, that part should also not go through the UI directly

fleet viper Dec 3, 2019, 3:47 PM

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yeah ik but ill leave it since this part works fine

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another thing is my cpp function in the player controller

winged badger Dec 3, 2019, 3:48 PM

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so if you decide to change controllers you can no longer adjust the characters visuals? 😄

fleet viper Dec 3, 2019, 3:48 PM

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controllers wont change

winged badger Dec 3, 2019, 3:48 PM

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or if you decide to have AI controller run the same Pawns

fleet viper Dec 3, 2019, 3:48 PM

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its a battlefieldish game

quiet wyvern Dec 3, 2019, 3:48 PM

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is this using too much bandwidth to sync two pawns plus a bunch of ai actors?

📎 Screenshot_9.png

fleet viper Dec 3, 2019, 3:49 PM

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@winged badger do you know why vs is not recognizing the declaration of those?

📎 Desktop_Screenshot_2019.12.03_-_16.48.58.64.png

quiet wyvern Dec 3, 2019, 3:49 PM

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also why does my ping in playerstate show like 10 but here its showing 50?

winged badger Dec 3, 2019, 3:51 PM

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you can close the error window and forget that it exists when working with unreal @fleet viper

fleet viper Dec 3, 2019, 3:51 PM

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you mean the msb3075 error?

winged badger Dec 3, 2019, 3:51 PM

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the default intellisense is not all that accurate, it has problems figuring out the autogenerated code

fleet viper Dec 3, 2019, 3:52 PM

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yeah its really annoying

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@winged badger about the msb3075 error?

winged badger Dec 3, 2019, 3:53 PM

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only the output log is relevant

fleet viper Dec 3, 2019, 3:54 PM

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well it says 1 succesfull one failed

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and when i start my editor the function is not there

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lol hate it

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@winged badger ideas?

winged badger Dec 3, 2019, 4:00 PM

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oh sure, let me consult my crystal ball

fleet viper Dec 3, 2019, 4:00 PM

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just thought that you might know this bug

winged badger Dec 3, 2019, 4:01 PM

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what bug? you did not paste the compile error

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(from the output log)

fleet viper Dec 3, 2019, 4:04 PM

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here you have it:

1>------ Build started: Project: UE4, Configuration: BuiltWithUnrealBuildTool Win32 ------
2>------ Build started: Project: FPSTemplate, Configuration: Development_Editor x64 ------
2> Couldn't parse '))' in UnrealBuildTool.ConfigFileSection of F:\Unicorn Seven Conquest\FPSTemplate\FPSTemplate\Config\DefaultEngine.ini
2> Compiling game modules for hot reload
2> Parsing headers for FPSTemplateEditor
2> Running UnrealHeaderTool "F:\Unicorn Seven Conquest\FPSTemplate\FPSTemplate\FPSTemplate.uproject" "F:\Unicorn Seven Conquest\FPSTemplate\FPSTemplate\Intermediate\Build\Win64\FPSTemplateEditor\Development\FPSTemplateEditor.uhtmanifest" -LogCmds="loginit warning, logexit warning, logdatabase error" -Unattended -WarningsAsErrors -installed
2> F:/Unicorn Seven Conquest/FPSTemplate/FPSTemplate/Source/FPSTemplate/Player/BasePlayerController.h(253) : LogCompile: Error: Replicated TArray parameters must be passed by const reference
2> UnrealHeaderTool failed for target 'FPSTemplateEditor' (platform: Win64, module info: F:\Unicorn Seven Conquest\FPSTemplate\FPSTemplate\Intermediate\Build\Win64\FPSTemplateEditor\Development\FPSTemplateEditor.uhtmanifest).
2>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.MakeFile.Targets(41,5): error MSB3075: The command "F:\UE_4.19\Engine\Build\BatchFiles\Build.bat FPSTemplateEditor Win64 Development "F:\Unicorn Seven Conquest\FPSTemplate\FPSTemplate\FPSTemplate.uproject" -WaitMutex -FromMsBuild" exited with code 5. Please verify that you have sufficient rights to run this command.
========== Build: 1 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

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you can ignore the hot reload its the same when not using hot reload

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@winged badger

winged badger Dec 3, 2019, 4:05 PM

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it tells you exactly how to fix it

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and never hot reload

fleet viper Dec 3, 2019, 4:06 PM

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you mean i have to make them const?

winged badger Dec 3, 2019, 4:06 PM

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what's "them"?

fleet viper Dec 3, 2019, 4:06 PM

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the functions

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2> F:/Unicorn Seven Conquest/FPSTemplate/FPSTemplate/Source/FPSTemplate/Player/BasePlayerController.h(253) : LogCompile: Error: Replicated TArray parameters must be passed by const reference

winged badger Dec 3, 2019, 4:06 PM

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Error: Replicated TArray parameters must be passed by const reference

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find me a replicated TArray parameter in your code

fleet viper Dec 3, 2019, 4:07 PM

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this is line 253: void ServerPCSetSkin(USkeletalMesh* Skin, const TArray<UMaterialInterface*>Materials);

winged badger Dec 3, 2019, 4:07 PM

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thats the function

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now which part is TArray parameter?

fleet viper Dec 3, 2019, 4:08 PM

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that one of the function const TArray<UMaterialInterface*>Materials

winged badger Dec 3, 2019, 4:08 PM

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and it has to be passed by const reference

fleet viper Dec 3, 2019, 4:09 PM

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ohhh

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thats the function that is used in bp and calls the replicated function declared in line 253:

void ABasePlayerController::PCSetSkin(USkeletalMesh * Skin, const TArray<UMaterialInterface*> Materials)
{
if (GetNetMode() == NM_Client)
{
ServerPCSetSkin(Skin, Materials);
return;
}

ASoldier * Soldier = Cast<ASoldier>(GetPawn());
if (Soldier)
{
    Soldier->ChangeSkin(Skin, Materials);
}

}

winged badger Dec 3, 2019, 4:10 PM

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but the TArray is not passed by const reference there

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its const, but its a copy

fleet viper Dec 3, 2019, 4:11 PM

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so i should do: Soldier->ChangeSkin(Skin, const Materials);

winged badger Dec 3, 2019, 4:11 PM

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sigh

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void ServerPCSetSkin(USkeletalMesh* Skin, const TArray<UMaterialInterface*>& Materials);

fleet viper Dec 3, 2019, 4:12 PM

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um ok

winged badger Dec 3, 2019, 4:12 PM

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now its a const reference

fleet viper Dec 3, 2019, 4:12 PM

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i clearly need to learn more about cpp

winged badger Dec 3, 2019, 4:13 PM

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which means a reference to the array is passed as a parameter instead of a copy of the entire array

fleet viper Dec 3, 2019, 4:15 PM

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ok

jolly siren Dec 3, 2019, 5:10 PM

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Does anyone know if Fortnite replays are clientside or serverside?

lofty wing Dec 3, 2019, 5:13 PM

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[QUESTION] Is it possible to have (via blueprints) one game communicate to another game on ports or in some way to transfer variables/data?

Not same game, nor multiple views to play the game. I'm asking closer to more an interface between two games. Kind of like an uplink without save slots and more active. Perhaps save slots work just fine and can be loaded at junctures. (This is more an intellectual curiosity than anything material at the moment).

meager spade Dec 3, 2019, 5:15 PM

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@jolly siren i was wondering the same thing

lost inlet Dec 3, 2019, 5:15 PM

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clientside

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i remember asking about them at unreal fest a year and a half ago when we were working on it ourselves

jolly siren Dec 3, 2019, 5:18 PM

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ahh okay awesome, I am working on optimizing ours. We were using a demo.RecordHz of 100 but I'm lowering that down

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Thank you sswires 🙂

grand kestrel Dec 3, 2019, 6:50 PM

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They do a lot of server validation

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But basically they decided it was too expensive doing server side

jolly siren Dec 3, 2019, 6:51 PM

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That makes sense

grand kestrel Dec 3, 2019, 6:51 PM

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I don't really see how you can get adequate server side validation tbh

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Enough to catch the hackers who do minor adjustments in particular

jolly siren Dec 3, 2019, 6:53 PM

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@lost inlet Does this only work for server side replays? I have modified demo net driver to remove the check to see if it is a multicast, but it still doesn't write the client rpcs to my replay here https://github.com/EpicGames/UnrealTournament/blob/clean-master/UnrealTournament/Source/UnrealTournament/Private/UTGameplayStatics.cpp#L81

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Since DemoNetDriver doesn't exist on the server

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Sorry forgot to include the link to what I was talking about

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https://udn.unrealengine.com/questions/458850/view.html

grand kestrel Dec 3, 2019, 6:55 PM

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I never liked the way they did their sound stuff

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Right concept possibly? But an absolute mess

lost inlet Dec 3, 2019, 6:55 PM

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that UDN ticket does mention an issue we had, you have to override CallRemoteFunction in your demo PC

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{
    // on the server, record server->client RPCs into the resulting demo
    UNetDriver* NetDriver = GetWorld()->DemoNetDriver;
    if (NetDriver && !NetDriver->ServerConnection)
    {
        NetDriver->ProcessRemoteFunction(this, Function, Parameters, OutParms, Stack, nullptr);
        return true;
    }

    return false;
}```

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like this

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so if you call UFUNCTION(Client) on your demo spectator controller then it gets recorded into the replay

jolly siren Dec 3, 2019, 6:56 PM

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Right, but won't that only work for server-side replays?

lost inlet Dec 3, 2019, 6:57 PM

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yes but a clientside demo should record what your local PC receives should it not?

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just noticed that UDN link literally has me replying to it lol

jolly siren Dec 3, 2019, 6:58 PM

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It's still not recording the client rpcs for me

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Yeah that's why I pinged you

lost inlet Dec 3, 2019, 6:59 PM

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we used serverside demos so this was a useful solution to us, i've not really tried implementing clientside demos but i always thought it would just playback almost as you witnessed it

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which would mean it would record client RPC functions that your player controller received

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i would need to look at how clientside demo playback is usually handled if it spawns a fake demo spectator controller or something

jolly siren Dec 3, 2019, 7:03 PM

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okay, yeah I wasn't sure if you were using serverside or clientside

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It might only be client rpcs on the playercontroller that aren't working

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I'll have to test

lost inlet Dec 3, 2019, 7:23 PM

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i just tried it with the local file streamer and it seems to be acting like a serverside demo

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and no RPCs fired, so would have to look at it further

jolly siren Dec 3, 2019, 7:39 PM

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okay, yeah that is what I'm seeing too

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The problem with the UT fix is that the DemoNetDriver doesn't exist on the server. So I don't know how to manually write a rpc to the demo like they do

lost inlet Dec 3, 2019, 7:47 PM

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probably more demonetdriver hackarounds, i'd suggest making a UDN ticket since you have access. i'd be interested to know myself even though we don't support clientside demos that readily

jolly siren Dec 3, 2019, 7:49 PM

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Yeah I can do that. I wonder if they just rely on replication for Fortnite instead of any rpcs for things like this that need to be recorded. I'll see if they will share some details on what they are doing.

lost inlet Dec 3, 2019, 7:50 PM

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event based stuff like notifications and chat does make more sense being sent to the PC though, i imagine a workaround is redirecting any local RPC calls to the demonetdriver kinda like it is for server side

quiet wyvern Dec 3, 2019, 8:42 PM

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Why is my playerstate ping = ping / 4?

sharp pagoda Dec 3, 2019, 8:43 PM

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Look at the comments, it's quantized

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ExactPing for the precise version

quiet wyvern Dec 3, 2019, 8:43 PM

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hmm im using blueprints

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dont see a exact ping

jolly siren Dec 3, 2019, 8:56 PM

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It's on the playerstate

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It's compressed to save on bandwidth

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I just realized they added ExactPingV2 too

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https://github.com/EpicGames/UnrealEngine/commit/e3fa2957df901f18b1df4c785229e925a61144f6

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interesting

jolly siren Dec 3, 2019, 10:35 PM

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@lost inlet In case you are interested, I received a good answer 🙂 https://udn.unrealengine.com/questions/541713/view.html

lost inlet Dec 3, 2019, 10:36 PM

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yeah kinda looks like what i would expect, you would need to forward the RPC to the demo spectator that your client has in the demonetdriver

jolly siren Dec 3, 2019, 10:36 PM

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Awesome, yeah that makes sense

quiet wyvern Dec 3, 2019, 10:46 PM

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What kind of values are good for a character/projectile NetUpdateFrequency?

meager spade Dec 3, 2019, 11:12 PM

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personal choice and depends on your game

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normal character settings are adequate

soft relic Dec 3, 2019, 11:44 PM

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why does my rts pawn not replicate a variable that I change from an event that is set to run on the server?

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can you run server events and replicate from a pawn actor in general?

meager spade Dec 3, 2019, 11:59 PM

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yes

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as long as that pawn has a controller

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or some owning connection

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usually set via SetOwner

soft relic Dec 4, 2019, 12:15 AM

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isnt a controller inheried by default from the game mode?

soft relic Dec 4, 2019, 1:05 AM

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📎 unknown.png

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why does this not give me the same length the server does if i put a print string of the length inside the server event?

ebon bramble Dec 4, 2019, 3:03 AM

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so it seems like UE4 automatically handles NetRelevancy and the server knows to stop giving clients information about an actor when teh client is too far away from that actor.

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however, mindblowly, the client keeps the actor 'alive' and ticking , even when its not receiving updates about it from the server

red pollen Dec 4, 2019, 3:03 AM

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Anybody link me in the right direction to having a widget created on all clients on a listen server?

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That would be greatly helpful 😄 😄 😄

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Also, from inside a widget, can I cast to the game state and grab say, a team score to display?

ebon bramble Dec 4, 2019, 3:04 AM

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how can i, on the client, destroy actors that arent net relevant ? or disable them or something. like they are completely irrelevant anyways...

red pollen Dec 4, 2019, 3:04 AM

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Or do I have to go through some other means?

winged badger Dec 4, 2019, 3:04 AM

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use HUD derived class to make the widget

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its local, one per PC

digital barn Dec 4, 2019, 3:42 AM

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has anyone bulk packaged the Paragon characters with no weapons on the UE4 skeleton?

twin juniper Dec 4, 2019, 5:02 AM

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Question about ping.
If server packets are sent every 100ms,
But server has ping of 280ms, does that make total ping 380ms?

rich ridge Dec 4, 2019, 5:45 AM

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@lost inlet u were right about the game instance being the first to get created, then world and then game mode.

I cross checked by putting logs in the respective constructors.

I don't know how game mode should behave, but I encountered weired thing with my Linux Dedicated server.

My game mode is printing log twice. The log is present inside constructor.

Is this correct behavior?

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@thin stratus do you any thoughts on this?

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@digital barn what is your requirements.
And how it is related to networking and multiplayer.

smoky dune Dec 4, 2019, 6:39 AM

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how do you guys check latency to a server and show it in game usually?

tidal moss Dec 4, 2019, 6:39 AM

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ping it somehow i would imagine no? i'm dumb

smoky dune Dec 4, 2019, 6:45 AM

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been using unreal's ICMPping for a while and it's giving me slowdown when it's pinging, so im wondering whether it's async or not

lost inlet Dec 4, 2019, 6:50 AM

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The log from the constructor will be called on CDO construction and the actual instance

rich ridge Dec 4, 2019, 7:01 AM

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@lost inlet so it means my setup is correct nothing to worry then

thin stratus Dec 4, 2019, 7:21 AM

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@smoky dune You mean upfront, before connecting?

smoky dune Dec 4, 2019, 7:21 AM

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yeah like in server browser situation

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currently im calling ICMPping to all discoverable server on the game

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but it's hitting the game thread quite considerably for some reason

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i got like 5-10ms increase on frametime pinging like 5 server

thin stratus Dec 4, 2019, 7:27 AM

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Which Subsystem?

smoky dune Dec 4, 2019, 7:40 AM

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let me check

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FIcmpEcho @thin stratus in Icmp.h

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i feel like it should be async already but it's hitting my game thread

thin stratus Dec 4, 2019, 7:55 AM

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No, I mean, what Subsystem are you using to discover the hosted Servers?

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Steam for example

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Or your own stuff?

smoky dune Dec 4, 2019, 8:12 AM

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oh, we used modified one

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we have system that tracks active server on backend, then proceed to ping them on the server browser

rich ridge Dec 4, 2019, 9:37 AM

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@smoky dune why don't you write a service a which keep tracks of active server and writes their state on DB, then expose an API for client to query active servers.

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@smoky dune or let your dedicated server write their state to common DB

smoky dune Dec 4, 2019, 9:56 AM

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yeah that's what we did

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problem is pinging

rich ridge Dec 4, 2019, 10:12 AM

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@smoky dune who you elaborate?

woeful ferry Dec 4, 2019, 10:13 AM

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Hi!

I'm doing some possession for my game. This function fires on both client and server, however.. my vehicle only gets possessed on server and not on client.

But both client and server have the same references.

📎 unknown.png

bitter oriole Dec 4, 2019, 10:14 AM

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The function needs to fire only on server

woeful ferry Dec 4, 2019, 10:16 AM

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This fires from player controller.

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And now it only runs on server and still don't fire on the client side.

bitter oriole Dec 4, 2019, 10:17 AM

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You don't need to unpossess, either

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Just call Possess on server only

woeful ferry Dec 4, 2019, 10:18 AM

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Yes, now I'm doing that aswell and still just fires on server side with the right references

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📎 unknown.png

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The top ones are the clients player controller, which don't work.

bitter oriole Dec 4, 2019, 10:19 AM

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The client cannot use Possess

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And I see blank names on the server there

woeful ferry Dec 4, 2019, 10:19 AM

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The server is the servers player controller

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doing listen server

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This is what it looks like when both client and host are controlling vehicles

📎 unknown.png

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This is the function

📎 unknown.png

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I think I've solved it

hollow oriole Dec 4, 2019, 10:37 AM

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Hey everyone, I wanted to create an online mobile (Android and iOS) shooter game, but I don't know anything about unreal engine's networking, like matchmaking or etc.

Do I need to use frameworks like node js or there is a native solution?

woeful ferry Dec 4, 2019, 10:38 AM

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http://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf

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This is a good start 😄

rich ridge Dec 4, 2019, 10:40 AM

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@hollow oriole you don't need any backend solution for playing multiplayer game.
You will only need backend for matchmaking, inventory and user management.

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You could use Gamespark, playfab

hollow oriole Dec 4, 2019, 10:42 AM

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@rich ridge thanks for the tips, what about ai? Do I need to process them locally or on server side?

rich ridge Dec 4, 2019, 10:42 AM

#

AI will be handled inside the engine

#

And u may need to host dedicated server , you could choose between gamelift, azure or playfab, google cloud if you don't intent to have listen server

hollow oriole Dec 4, 2019, 10:44 AM

#

Thanks again 🙏

#

@woeful ferry tnx 🙏

rich ridge Dec 4, 2019, 11:13 AM

#

@woeful ferry how did you solve this.

woeful ferry Dec 4, 2019, 11:13 AM

#

My colleague had froze the vehicle when no one is in it and didn't replicate that function.

#

So it worked what I had, that's why I was confused.

rich ridge Dec 4, 2019, 11:14 AM

#

Ok

woeful ferry Dec 4, 2019, 11:14 AM

#

So now I disabled that function and the vehicle works 100% 🙂

plain flume Dec 4, 2019, 11:19 AM

#

Is something changed in 4.23? I recall you could not do any server RPCs if Actor didn't have a Owner. Now it doesn't matter at all. Weird.

📎 Servercall.png

bitter oriole Dec 4, 2019, 11:20 AM

#

You still can't RPC from actors that are not locally owned

#

Just like before

plain flume Dec 4, 2019, 11:20 AM

#

Hmm.. But my actor is just a actor placed in level. Who owns it then? GetOwner() returns null

thin stratus Dec 4, 2019, 11:21 AM

#

No one, but the BeginPlay calls for the Server and a ServerRPC on the Server becomes a normal event.

plain flume Dec 4, 2019, 11:21 AM

#

Aah right.

#

Thanks

#

In what scenario for example Actor isn't locally owned

thin stratus Dec 4, 2019, 11:22 AM

#

Whenever you spawn it without specifying a player as its owner for example.

bitter oriole Dec 4, 2019, 11:22 AM

#

Locally owned means owned by PlayerController, PlayerState, or the player Pawn

#

Anything else isn't RPC capable

#

Actors owned by actors owned by one of these classes will be RPC capable too

thin stratus Dec 4, 2019, 11:23 AM

#

📎 unknown.png

bitter oriole Dec 4, 2019, 11:23 AM

#

Basically your Actor needs to be owned by the local PlayerController, ultimately, through any chain of owners

#

For RPC

thin stratus Dec 4, 2019, 11:23 AM

#

Server and Client RPCable*. A Multicast should work either way.

twin juniper Dec 4, 2019, 11:24 AM

#

theres some database which works easily with blueprints?

bitter oriole Dec 4, 2019, 11:24 AM

#

Yeah I did mean "RPC from client" here

thin stratus Dec 4, 2019, 11:24 AM

#

No idea. You'll need a plugin either way. So check what plugins exist and combine that with what database you wanna use.

#

HTTP Request stuff is probably a good start.

#

@twin juniper

plain flume Dec 4, 2019, 11:24 AM

#

Aah yeah. I undestand the basics of how it works and that chain needs to end to PlayerController. was not sure why it ended there when there was no owner, but now it makes sense

twin juniper Dec 4, 2019, 11:25 AM

#

i would like to use mongo

thin stratus Dec 4, 2019, 11:25 AM

#

Well, you are calling a ServerRPC on BeginPlay. So can't be too sure you 100% got the basics :D @plain flume

twin juniper Dec 4, 2019, 11:25 AM

#

but i was looking the c++ driver implementation and its hell

bitter oriole Dec 4, 2019, 11:25 AM

#

How to use a database in your game : have a Web server talking to it, send HTTP requests to your Web server

#

Easiest, safest way

plain flume Dec 4, 2019, 11:27 AM

#

@thin stratus Yeah. Well maybe not then :/..

#

but for my defence, I only called it in BeginPlay to test my hypothesis 😄

#

and when it failed I came to ask advice from you guys 🤓

bitter oriole Dec 4, 2019, 11:29 AM

#

Half the multiplayer knowledge in UE4 is knowing what's called on client, or server, or both

plain flume Dec 4, 2019, 11:49 AM

#

One more question. I asked it here before, but didn't get answer. If I change the dormancy setting of the actor from class defaults, it still replicates even if I set it to Dormant All. Any idea why it doesn't affect anything? I tried to do a huge delays between replication events to test that if it needs some downtime to go dormant, but after delays replication starts again. This happens for example for the ghost in content examples

📎 dormant.png

#

the right ghost still drops even if it said that Dormant All or dormant initial

humble comet Dec 4, 2019, 12:54 PM

#

Guys after implementing this https://wiki.unrealengine.com/Authoritative_Networked_Character_Movement launch character is not working on client, has someone experienced this before??

Authoritative Networked Character Movement

twin juniper Dec 4, 2019, 1:23 PM

#

the launch character must be called from the server

#

not at client

humble comet Dec 4, 2019, 2:03 PM

#

@twin juniper yeah, youre right, somehow it got imprinted in my memory that launch character had rpc calls inside it, but after looking inside code, it just changes velocity on the server and cmc sends locations to client

crimson fiber Dec 4, 2019, 3:53 PM

#

c'mon can't believe it's still a thing

📎 2019-12-04_21-16-02.png

#

ChangeMap(Server)

#

works on same machine (different processes)

#

crashes on different PCs (on client)

fleet raven Dec 4, 2019, 4:03 PM

#

does this different pc have a crappy internet connection?

crimson fiber Dec 4, 2019, 4:05 PM

#

no way

winged badger Dec 4, 2019, 4:09 PM

#

seamless travel, widget components that crash on travel map?

fleet raven Dec 4, 2019, 4:10 PM

#

no

#

it's some engine bug with writing the packets

crimson fiber Dec 4, 2019, 4:11 PM

#

nope seamless is off

winged badger Dec 4, 2019, 4:16 PM

#

sorry, didn't read the assert, just went to most common crash cause 😦

crimson fiber Dec 4, 2019, 4:42 PM

#

is there a walkaround for this?

#

maybe updating steamsdk? I'm on 4.22 using 1.39

fleet raven Dec 4, 2019, 4:44 PM

#

use a shipping build with assertions disabled voxelsmart

crimson fiber Dec 4, 2019, 4:44 PM

#

hmm

fleet raven Dec 4, 2019, 4:44 PM

#

who knows what it will do then

#

maybe corrupt random memory and crash in totally unpredictable ways 5 seconds later

crimson fiber Dec 4, 2019, 4:45 PM

#

awesome 😄

fleet raven Dec 4, 2019, 4:46 PM

#

I got this error two times in crash reports from players, both were having a garbage internet connection when it happened

#

no idea of the actual cause

twin juniper Dec 4, 2019, 4:59 PM

#

i have that event, where at client im receiving success and at server im receiving failure
but i thought why its being called at server at all?
if its marked as "executes on owning client"

📎 unknown.png

winged badger Dec 4, 2019, 4:59 PM

#

wireless @fleet raven ?

#

@twin juniper listen server?

twin juniper Dec 4, 2019, 5:01 PM

#

ye

winged badger Dec 4, 2019, 5:01 PM

#

that one is both client and a host tho

#

server*

#

it will "receive" any client RPCs meant for its controller - they are just normal function calls then

twin juniper Dec 4, 2019, 5:02 PM

#

theres way i can evade the false event?

winged badger Dec 4, 2019, 5:03 PM

#

its a boolean you are sending as payload, no?

twin juniper Dec 4, 2019, 5:05 PM

#

hmm, i guess check has authority can be enough

fluid flower Dec 4, 2019, 6:25 PM

#

hey all, in order to get steam dedicated servers working I added GlobalDefinitions to my target.cs file, which works great. But now I get the following error when using launcher version.

📎 unknown.png

slender yarrow Dec 4, 2019, 7:19 PM

#

does anyone know why 1 characters movement would be choppy and another one's smooth if theyre both using the standard CharacterMovement component?
https://www.youtube.com/watch?v=Wqqej8LKqhk

YouTube

Plzwork123

UE4 Multiplayer: Persistent lag/jitter problems

Wish I could say this was a video about FIXING whats in the title but sadly its the opposite. I have tried almost everything possible between Blueprints and ...

▶ Play video

#

if you see that first characters movement, it is just not satisfactory for an FPS game. It become very hard to target and shoot the character when its moving like that

#

Ive had one hell of a time trying to fix/smooth this out over the past few months and im at a standstill now

#

like im wondering what movement system theyre using for Fortnite or any other UE4 multiplayer game that is smooth

lost inlet Dec 4, 2019, 7:29 PM

#

for LOD levels < 2, we ended up disabling bNetworkSkipProxyPredictionOnNetUpdate for jitter that wasn't too dissimilar to that example

slender yarrow Dec 4, 2019, 7:38 PM

#

looks like that was disabled by default on this character

hoary lark Dec 4, 2019, 7:54 PM

#

net isn't saturated is it?

grand kestrel Dec 4, 2019, 7:54 PM

#

@slender yarrow they are using CMC lol. You've likely added movement code in blueprint which is a huge no no

slender yarrow Dec 4, 2019, 8:01 PM

#

well the basic walking youre seeing is just InputAxis into the AddMovementInput node and nothing else. And that still doesnt explain how the 2nd character which is 100% blueprints is smoother.

hoary lark Dec 4, 2019, 8:07 PM

#

Net isn't saturated is it?

#

Stat Net, look for Out Saturation % on that client, and Saturated 0/1 on the server and client

void nest Dec 4, 2019, 8:40 PM

#

When I use the get ping in ms node it returns for example (75 ms) this should be a 0.08 s delay? However, with this amount of ping the responsiveness feels more than a second delay? Why is this? Does the ping node not work properly?

slender yarrow Dec 4, 2019, 8:44 PM

#

@hoary lark how do you check that?

hoary lark Dec 4, 2019, 8:55 PM

#

that's what I said... Stat Net

twin juniper Dec 4, 2019, 9:30 PM

#

theres some tutorial arround how to make a staged project connect to a listen server?

#

i tryed with dedicated server, someone here said its only work if i build from source the engine

#

i tryed with client, doing the open using localhost or my own router address

#

it doesnt connect

#

it just open another listenserver instance

slender yarrow Dec 5, 2019, 12:10 AM

#

📎 Untitled.jpg

#

@hoary lark is this what you were talking about

hoary sandal Dec 5, 2019, 12:17 AM

#

Hi guys I'm trying to open doors through a button I seem to be having issues with the input on the client

#

https://gyazo.com/1bf4a66c1c6cbcd337f63bf906d02da0

Gyazo

▶ Play video

#

The server is able to do the behaviour with no problem, the door are automatic unless the players chooses to override the behaviour by pressing the button

#

this is how I handle the input https://gyazo.com/1b994121e700bb860fadde69cfbbae66

Gyazo

#

the overlapped actor variables get populated from the character itself https://gyazo.com/e0af10a23663d4b7897f7eab24a490cb

Gyazo

#

and lastly here's the button https://gyazo.com/9614dc83c9b4cecf9a59b01bfc3a6329

Gyazo

timid moss Dec 5, 2019, 12:26 AM

#

@slender yarrow try openng the console in game and type "p.NetShowCorrections 1" It shows when the character gets teleported back in the correct place from the server using red capsules when it happens. If there are no red capsules then you know its not a problem with the character movement component, but if there are red capsules when the jitter happens then you know theres a problem with the character movement component

knotty crown Dec 5, 2019, 12:32 AM

#

I'm having trouble with an error that is being logged by the engine...

📎 Capture2.PNG

#

📎 Capture.PNG

#

I'm trying to make a networked player, however it says "accessed none" when refering to my pawn, even though this code should only be executing on the client

slender yarrow Dec 5, 2019, 12:34 AM

#

@timid moss I didnt see any red capsules. This choppiness only happens when 'Use Single Process' is unchecked (and in packaged project). Its all very smooth when Single Prccess is checked

#

@knotty crown Its running that on all remote clients

#

try Is locally controlled as well

#

or just do an isValid check on get controlled pawn

knotty crown Dec 5, 2019, 12:35 AM

#

I tried that and it worked, but I didn't know if it was a good/proformant solution 🙂

#

Thanks

timid moss Dec 5, 2019, 12:36 AM

#

@slender yarrow maybe just to verrify that itss a problem on the clients scrreen test what it looks like from the servers prospective (use listen server to view what it looks like)

slender yarrow Dec 5, 2019, 12:44 AM

#

I guess the Clients movement looks kina jittery from the Listen servers view yeah

timid moss Dec 5, 2019, 12:45 AM

#

ok thats good news (i would think). because that means that its not a networking problem i think

#

which makes it simpler

potent prairie Dec 5, 2019, 12:52 AM

#

@hoary sandal your player might not be at index 0 of get player controller, which is why you shouldnt use that in multiplayer games

hoary sandal Dec 5, 2019, 12:53 AM

#

@potent prairie the index is for local multiplayer only

potent prairie Dec 5, 2019, 12:54 AM

#

what exactly happens when the player presses the button?

#

it opens on server but not client side?

hoary sandal Dec 5, 2019, 12:55 AM

#

yeap

slender yarrow Dec 5, 2019, 12:57 AM

#

Do a multicast and make sure the timeline is checked for replicated

#

oh its running from an overlap

hoary sandal Dec 5, 2019, 12:58 AM

#

I already did and it works but they are not sync, also you cannot replicate timelines

#

oh nevermind you had to get inside to do it derp XD

potent prairie Dec 5, 2019, 12:58 AM

#

I made a door awhile ago for multiplayer, let me see what I did brb

knotty crown Dec 5, 2019, 1:01 AM

#

Does anyone know if "is valid" uses up a lot of proformance? Is it okay to use it on every input of every player controller in a 64 player game, or will that be bad?

📎 Capture.PNG

slender yarrow Dec 5, 2019, 1:02 AM

#

yeah then only problem with the axis stuff is its basically an event tick

#

so its checking every frame

knotty crown Dec 5, 2019, 1:03 AM

#

yeah "is valid" will be a problem, or axis input will be a problem, or both?

slender yarrow Dec 5, 2019, 1:04 AM

#

if you have multiple characters using the same PC i think its better to just put the axis and controls in each character

#

so they have their own control and input nodes

knotty crown Dec 5, 2019, 1:05 AM

#

no, it's intended to be internet multiplayer, so there should only be 1 player character on each PC

slender yarrow Dec 5, 2019, 1:05 AM

#

it will also allow you to do custom key bindings for each character

potent prairie Dec 5, 2019, 1:05 AM

#

isvalid is just a quick macro, you can double click it and look. it wont cause any performance issues

slender yarrow Dec 5, 2019, 1:06 AM

#

yeah i guess its just using the IsValid bool. It shoulkdnt be too bad

smoky dune Dec 5, 2019, 1:07 AM

#

@rich ridge iirc when i was pinging i got a spike in gameframe caused by UDPReader when i was prolifing

#

sorry for late reply,, just woke up

knotty crown Dec 5, 2019, 1:07 AM

#

OK, @potent prairie and @slender yarrow, Thanks for the help!

potent prairie Dec 5, 2019, 1:08 AM

#

@hoary sandal yeah im running the timeline for my door after a multicast event and it shows it for all clients in sync

timid moss Dec 5, 2019, 1:11 AM

#

btw if you care about performance i wouldn't use a timeline. ive heard they are expensive

potent prairie Dec 5, 2019, 1:15 AM

#

cant see them being bad for a a door though

timid moss Dec 5, 2019, 1:16 AM

#

idk how bad they r, but i just use lerps just incase

hoary sandal Dec 5, 2019, 1:16 AM

#

@potent prairie multicast and replicated timeline https://gyazo.com/1ef5ceae199cd90b0d789d3ac664fab1

Gyazo

▶ Play video

#

it's out of sync

potent prairie Dec 5, 2019, 1:17 AM

#

@timid moss yeah lerp is probably better. You should show him how to set up a simple lerp for a door, maybe itll fix his sync issues

timid moss Dec 5, 2019, 1:19 AM

#

i cant imagine it would be that slow that it would be out of sync. but i can't atm give any help. I'm working on a school project😅

ocean geyser Dec 5, 2019, 1:45 AM

#

just use OnRep and open/close the door based on whether or not the door is open. its simple enough to run a loop on the clients to rotate the door

hoary lark Dec 5, 2019, 2:01 AM

#

@slender yarrow No... Stat net is a console command. Google these things doge however the profiler there does clearly suggest saturation. You might like to read this thread. My post is in it below
https://www.reddit.com/r/unrealengine/comments/a0n455/listen_server_host_sees_clients_jittering_fix/

Listen Server host sees clients jittering fix

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

slender yarrow Dec 5, 2019, 2:05 AM

#

does that information you posted apply to dedicated serv as well?

hoary lark Dec 5, 2019, 2:05 AM

#

The net saturation issue is born on the remote client, so yeah

#

There is a new setting in 4.23 that limits the replication frame rate... I think it defaults to 120... But default bandwidth is still 10kbps I think (notice your out is 9.9)

slender yarrow Dec 5, 2019, 2:09 AM

#

i wonder why the defaults are so low

hoary lark Dec 5, 2019, 2:20 AM

#

my guess, they were set and remained untouched since like 2004

slender yarrow Dec 5, 2019, 2:25 AM

#

well regrettably. Changing those settings didnt fix the jitter

#

one thing i noticed. When using PIE the output is around 7kb/s. Chars are smooth. When Single Process is unchecked and running as standalone game, output is like 3KB/s. i wonder if this has something to do with it

#

and why would it be lower

hoary lark Dec 5, 2019, 2:51 AM

#

darn 😦 well, the output will vary based on your framerate, though usually standalone is running faster with more bandwidth usage

slender yarrow Dec 5, 2019, 3:01 AM

#

yeah its LESS for some reason

pure hemlock Dec 5, 2019, 3:02 AM

#

Hi, there. How to reduce the CPU useage of every PlayerControl on the dedicated server? I tested it, a PlayerControl have much more CPU useage than an AIControl.

#

They use the same pawn, but there is a huge performance cost in every one PlayerControl, I don't know why. Does dedicated server need all these high cost things?

rich ridge Dec 5, 2019, 4:31 AM

#

@smoky dune r u pinging on gamethread.
If you ask me to solve this problem, I will have a socket connection and I will listen for ping event from my backend server.

So you backend has to get the list clients asking for ping information and then send the ping info after 5 seconds.

smoky dune Dec 5, 2019, 6:07 AM

#

yeah i think im pinging on gamethread, not sure whether switching it on another thread would work, i should try

#

hmm yeah that'll probably work

rich ridge Dec 5, 2019, 6:09 AM

#

@smoky dune network call on gamethread will effect

smoky dune Dec 5, 2019, 6:09 AM

#

is making a new thread on blueprint function implementation ok?

rich ridge Dec 5, 2019, 6:58 AM

#

@smoky dune sorry but I purely code in c++

rich ridge Dec 5, 2019, 8:37 AM

#

@smoky dune this should work by the way, thread in c++ or blueprint doesn't matter, if creating thread in BP is allowed

smoky dune Dec 5, 2019, 9:57 AM

#

oh that's great, i'll look for a way on threading in ue4 then, i think it's using FAsync?

upper moat Dec 5, 2019, 1:50 PM

#

Is there a tutorial or a page on how to set up a priver dedicated server for my own game

bitter oriole Dec 5, 2019, 1:53 PM

#

Build the dedicated server, rent a VPS, put it on it ?

ivory portal Dec 5, 2019, 1:54 PM

#

I've got a weird problem, the event OnSetMatchState with new state "WaitingToStart" is fired before everyone has joined the map ;-/ this doesn't happen in the other maps, anyone got an idea where I can look?\

upper moat Dec 5, 2019, 1:55 PM

#

@bitter oriole I know i can rent but i dont have any money to rent and i need it to be online for tommorow

bitter oriole Dec 5, 2019, 1:56 PM

#

Dedicated servers cost money 🤷

#

Keep it on your own computer if you can't rent one ?

upper moat Dec 5, 2019, 1:56 PM

#

thats what im trying to do

#

can i use the google VPS one

bitter oriole Dec 5, 2019, 1:58 PM

#

What ?

upper moat Dec 5, 2019, 1:59 PM

#

i typed dedicated server VPS and it showed me google VPS

#

can i use that one

#

or the Amazone Web Services one it seas its free

bitter oriole Dec 5, 2019, 2:00 PM

#

AWS is nowhere near free

#

I don't believe there are free VPS, at all, especially for the kind of power UE4 games need

upper moat Dec 5, 2019, 2:01 PM

#

i mean there should be a 48h trile

bitter oriole Dec 5, 2019, 2:02 PM

#

Just put it on your own machine if you only need a game that works for 48h

upper moat Dec 5, 2019, 2:02 PM

#

ok Then

#

just one thing

#

do you have any tutorial or a page with instructions

bitter oriole Dec 5, 2019, 2:03 PM

#

Have you tried googling "UE4 dedicated server" ?

upper moat Dec 5, 2019, 2:04 PM

#

yep and it only some outdated tutorials and dedicated server host (not free)

ivory portal Dec 5, 2019, 2:05 PM

#

We use AWS Gamelift

bitter oriole Dec 5, 2019, 2:05 PM

#

The software will be the same.

ivory portal Dec 5, 2019, 2:05 PM

#

Has a free tier (not a lot)

bitter oriole Dec 5, 2019, 2:05 PM

#

How your server is hosted has no relation with how you compile it :/

#

Take the first result and follow it

ivory portal Dec 5, 2019, 2:05 PM

#

but for testing it is cheap

#

like <5 Euro a month atm for us

twin juniper Dec 5, 2019, 2:09 PM

#

maybe https://docs.unrealengine.com/en-US/Gameplay/Networking/Server/index.html helps? @upper moat

Client-Server Model

An overview of the role of the server in multiplayer.

#

i.e. : `
Dedicated Server

UE4Editor.exe ProjectName MapName -server -game -log

Client

UE4Editor.exe ProjectName ServerIP -game`

upper moat Dec 5, 2019, 2:10 PM

#

https://www.youtube.com/watch?v=iMNjp5L7_oA is this one ok

YouTube

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

bitter oriole Dec 5, 2019, 2:11 PM

#

The first result on google for "UE4 dedicated server" should work

upper moat Dec 5, 2019, 2:11 PM

#

https://wiki.unrealengine.com/Dedicated_Server_Guide_(Windows_%26_Linux)

Dedicated_Server_Guide_(Windows_%26_Linux)

#

it seas to download from source the page is not there any more

bitter oriole Dec 5, 2019, 2:12 PM

#

Yes, it is

#

You just need a Github account with UE4 access

#

📎 unknown.png

upper moat Dec 5, 2019, 2:13 PM

#

thats why there was nothing i need to link the github to ue4

#

i would have had this done 2months ago but but i left it to bee

tribal shard Dec 5, 2019, 2:17 PM

#

Hey everyone, I built a Widget that displays a players IP address to the other players (as Text widget)
This works great, but I ultimately want the widget to open a web browser to a HTTP server that each of the players has running (so it uses their IP address in the URL)
I.e. when a player joins the game, each player he sees is visually represented by a web browser widget where the website is running on their PCs respectively
I figured this wouldn't be an issue, as showing their IP addresses in the widget already works, so I just added a Web Browser widget and call Load URL on it with the IP address - but it only works for the host
That is, the URL is loaded correctly for the host's pawn only, for all other pawns it shows the initial URL

Anyone have an idea why that is? Full code here: https://blueprintue.com/blueprint/73wdsljq/

rich ridge Dec 5, 2019, 2:23 PM

#

@tribal shard https://docs.unrealengine.com/en-US/Engine/UMG/UserGuide/WidgetTypeReference/WebBrowser/index.html

Web Browser

Overview of using the Web Browser widget to create in-game web browsing functionality.

#

@tribal shard https://forums.unrealengine.com/community/released-projects/8642-plugin-radiantui-sdk-uis-huds-interactive-webviews-html5-javascript-css

Unreal Engine Forums

For announcing the release of new products, or showing off your completed work.

tribal shard Dec 5, 2019, 2:29 PM

#

@rich ridge I've seen the docs

rich ridge Dec 5, 2019, 2:47 PM

#

@tribal shard so what is the problem?

tribal shard Dec 5, 2019, 2:48 PM

#

That is, the URL is loaded correctly for the host's pawn only, for all other pawns it shows the initial URL

rich ridge Dec 5, 2019, 4:06 PM

#

@tribal shard r u trying to replicate the widget?

#

Widgets don't replicate

tribal shard Dec 5, 2019, 4:11 PM

#

I am not, I just need each client to call Load URL

rich ridge Dec 5, 2019, 4:12 PM

#

Have you tried to harcodre the URL each client differently

#

Then see whether all clients are loading the URL or not

#

You can debug this way.

#

@tribal shard for example client 1 -> load YouTube.
Client 2 load epicgames.com and so on

#

If it loads then somei is wrong with your setup not with widgets

tribal shard Dec 5, 2019, 4:21 PM

#

On Url Changed gives me this output for 3 clients, with the initial URL being Github:

LogBlueprintUserMessages: [UIVideo_C_1] Server: https://github.com/
LogBlueprintUserMessages: [UIVideo_C_2] Server: https://github.com/
LogBlueprintUserMessages: [UIVideo_C_0] Server: http://127.0.0.1:8070/
LogBlueprintUserMessages: [UIVideo_C_2] Client -2: http://127.0.0.1:8070/
LogBlueprintUserMessages: [UIVideo_C_1] Client -2: https://github.com/
LogBlueprintUserMessages: [UIVideo_C_0] Client -2: https://github.com/
LogBlueprintUserMessages: [UIVideo_C_1] Client -2: http://127.0.0.1:8070/
LogBlueprintUserMessages: [UIVideo_C_0] Client -2: https://github.com/
LogBlueprintUserMessages: [UIVideo_C_2] Client -2: https://github.com/

#

With no initial URL set:

LogBlueprintUserMessages: [UIVideo_C_2] Client -2: http://127.0.0.1:8070/
LogBlueprintUserMessages: [UIVideo_C_1] Client -2: http://127.0.0.1:8070/

Which makes sense, as it loads the URL only for the server pawn

#

I just don't understand why that is, because if I use a text widget and use setText to display the IP, it shows the correct IP for every single client (on all clients), not only for the server

rich ridge Dec 5, 2019, 4:42 PM

#

@tribal shard for server the URL is GitHub . For other clients it's your local server, is your local server running up.

#

@tribal shard can you hardcore the YouTube or good working URL and check visually.

tribal shard Dec 5, 2019, 4:52 PM

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@rich ridge either URL loads just fine, thats not the issue, the problem is that it should be loading http://127.0.0.1:8070/ for all pawns, not just the server pawn

rich ridge Dec 5, 2019, 5:03 PM

#

@tribal shard u r using listen sever

tribal shard Dec 5, 2019, 5:03 PM

#

yes

rich ridge Dec 5, 2019, 5:05 PM

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It's just a guess, I think once a client is connected to dedicated server, it's whole networking is connected to host. And when client is trying to point to it's local it's opening server's local.

#

Someone really experienced like exi would be able to prove my guess is wright or wrong.

tribal shard Dec 5, 2019, 5:09 PM

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but why does it work with the text widget and not when I call Load URL with the very same string?

rich ridge Dec 5, 2019, 5:09 PM

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Once a client is connected to dedicated server it uses a netdriver and it drives all network trffic

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@tribal shard yes I get it, when u try to load the URL it's using the same netdriver

#

I m only guessing

#

You can get the ip of clients

#

@thin stratus can you help us here.

#

@lost inlet you can also help.

#

This is getting very interesting

lost inlet Dec 5, 2019, 5:13 PM

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you shouldn't demand that someone help you

rich ridge Dec 5, 2019, 5:13 PM

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@lost inlet ok will keep that in mind, sorry for bothering

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@tribal shard try to load localhost before clients join the session

thin stratus Dec 5, 2019, 5:36 PM

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@tribal shard You are not by any chance expecting the Widget to actively replicate or?

rich ridge Dec 5, 2019, 5:36 PM

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@thin stratus It's just a guess, I think once a client is connected to dedicated server, it's whole networking is connected to host. And when client is trying to point to it's local it's opening server's local.

#

Is this valid

thin stratus Dec 5, 2019, 5:39 PM

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No idea tbh

#

📎 unknown.png

#

That chunk here calls for all clients, not only the owning one

#

Given this is a Pawn you call it in

#

In addition you then further down use "GetController"

#

Which isn't valid for pawns on BeginPlay

#

You need to use the PossessedEvent in BPs and perform a ClientRPC to make sure you are on the owning client @tribal shard

jolly siren Dec 5, 2019, 6:06 PM

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Can you combine replication conditions? Like COND_InitialOnly and COND_SimulatedOnly ?

tribal shard Dec 5, 2019, 6:21 PM

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@thin stratus do you mean this?

📎 unknown.png

#

you mean put this in here?

📎 unknown.png

thin stratus Dec 5, 2019, 6:24 PM

#

Not exactly

#

Possessed -> ClientRPC -> PinkStuff

tribal shard Dec 5, 2019, 6:24 PM

#

ill try, thanks

#

Like this? Sorry, I'm really new to UE
https://i.imgur.com/sIGBQSs.png

Imgur

hollow bridge Dec 5, 2019, 7:38 PM

#

Hi guys, what will be the best way to spawn a falling object, simulate physics causes replication issues obviously

meager spade Dec 5, 2019, 8:14 PM

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you dont need to replicate to server from the possessed, possessed is server only

sand dock Dec 5, 2019, 8:57 PM

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Is there a "correct" way to check if a "open level" (to a remote ip hosting a dedicated server) failed, via blueprints?

cosmic star Dec 5, 2019, 10:24 PM

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So I've been trying to wrap my head around this: I have an inventory that is only going to be changed by the server and when it's changed I want to let other parts know it changed. Naturally I created a dynamic multicast delegate and added an array parameter with the changed inventory slots.
However: If called on the server, it doesn't reach the client at all.
Now I could remove the array parameter from the delegate and call the delegate like normal and on the client I then call the delegate in an OnRep function. This seems very hacky to me. Is there a better solution to let server and clients know which inventory slots changed?

meager spade Dec 5, 2019, 11:10 PM

#

sounds like you want a fastarrayserializer

cosmic star Dec 5, 2019, 11:16 PM

#

a) Is there any documentation about it?
b) It came to my mind that I (maybe) could call a multicast function with the appropriate params which then in turn calls the delegate. Since it's from the server, it should get to all clients as well.

#

Oh, I might add, that the array used in the multicast delegate is just a TArray<int32>

worthy perch Dec 6, 2019, 5:34 AM

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TArrays replicate fine.
You can check NetSerialization.h for how to implement FFastyArraySerializer. It's pretty straight-forward actually.
You also may want to reconsider restructuring whatever it is that requires you to multicast an array like that.
Though, FFastSerializer will do stuff to the order of the array, and if it's for an array of ints, maybe you don't want that.

viscid bronze Dec 6, 2019, 7:54 AM

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Hello. I need some help with my melee damage system. I have this system where when MeleeButton is pressed, it will damage all players in a certain area around you. Why is it not working? I have found that it appears that RadialDamage does not hit anything within its radius, even when up against another player.

📎 unknown.png

#

📎 unknown.png

#

In the player blueprint is this, for receiving RadialDamage

📎 unknown.png

#

📎 unknown.png

void orbit Dec 6, 2019, 8:25 AM

#

Hey. This might be a bit stupid but what is the best way to handle stuff like tracking number of players on a Team

#

I used to do a simple addition/subtraction but that looks prone to breaking and not representing true playercount

rich ridge Dec 6, 2019, 10:21 AM

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@void orbit GameMode will held the two lists Team A and Team B

#

Just get the length of the lists

void orbit Dec 6, 2019, 10:35 AM

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Can lists ever end up with length<0 ?

mellow copper Dec 6, 2019, 10:53 AM

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I'm trying to wrap my head around how that would look.. And what the uses of all this negative memory are...
so no, you will get an out of bounds error when trying to access index -1

rich ridge Dec 6, 2019, 11:07 AM

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@void orbit it is always >= 0

void orbit Dec 6, 2019, 11:10 AM

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hey, someone has to ask the stupid questions right? @mellow copper :D

Thanks a lot @rich ridge

mellow copper Dec 6, 2019, 11:12 AM

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@void orbit No worries, we've all been there. I really enjoyed the thought experiment though 😉

cosmic star Dec 6, 2019, 11:20 AM

#

@worthy perch Is's simply a thing I need to do, since items in the inventory can apply gameplay effects and visual representations to the player and just refreshing the whole array would mean that these effects get removed and re-applied, possibly skewing the end results. But thanks for pointing me to the header.

worthy perch Dec 6, 2019, 11:23 AM

#

If you do choose to use FFastArraySerializer, the client can receive a callback for what was changed from the array -- add, remove, change.

cosmic star Dec 6, 2019, 11:37 AM

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Meaning, I'd implement FFastArraySerializer for my inventory array and when the client gets the replicated array I can inspect which items changed?

winged badger Dec 6, 2019, 11:37 AM

#

callback happens on the item that changed

cosmic star Dec 6, 2019, 11:40 AM

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One callback for every item changed in the array?

winged badger Dec 6, 2019, 11:41 AM

#

it has 3 callbacks - PostReplicatedAdd, PostReplicatedChange and PreReplicatedRemove

#

those are functions on the FFastArraySerializerItem

#

which is a struct that has to wrap whatever you're replicating via FFastArraySerializer

#

and a callback is called on the Item instance itself

cosmic star Dec 6, 2019, 11:44 AM

#

Got it. According to the documentation inside NetSerialization.h I have to use the custom array that inherits fromFFastArraySerializer instead of a plain TArray<FMyType>, right?

grizzled stirrup Dec 6, 2019, 12:32 PM

#

If you’d like to support both solo and online play for each mode with two different buttons, should you still create a private session for the solo option or can I safely just directly open the map and have it function the same way knowing that StartSession and other session based calls made by the GM will not be valid?

#

This is in the context of using steam listen servers to host the sessions

nocturne berry Dec 6, 2019, 12:46 PM

#

i'm having a very weird problem where i cannot move the character but i can rotate him, this happens when the character respawns after he dies.
I am using the built in Restart Player in game mode.
I printed all the variables and checked if the character is correctly possessed and everything is normal, i can even call input buttons from within this character blueprint. Though if i open the command prompt and write ShowDebug AbilitySystem it shows on the top that the character is Simulated and not Locally Controlled, although if i check the character he is locally controlled.
This is happening very rarely and only on the internet, never happened if playing locally.

Any idea what might be the problem?

winged badger Dec 6, 2019, 12:48 PM

#

you respawned it with capsule penetrating the floor

#

would be my first guess

nocturne berry Dec 6, 2019, 12:49 PM

#

but the character is always repawning on the player start

#

how can i know if it is penetrating or not?

#

and why would it say Simulated and not locally controlled?

#

the weird thing is that sometimes if i keep it for a couple of minutes it turns back to locally controlled and then i can move again

hollow bridge Dec 6, 2019, 1:27 PM

#

Hi guys, what will be the best way to spawn a falling object, simulate physics causes replication issues obviously

twin juniper Dec 6, 2019, 1:28 PM

#

This channel makes me nervous!! 😎 💪

Love what's beeing talked here! Smart stuff and tech going on here!
Have been searching for results around on this Discord about ANDROID MULTIPLAYER.. but can't get a simple and clear picture/way to go/strategy to succesfully develop

Am finishing a offline ADVENTURE 3D GAME for android in UNREAL 4.23.. And i see around the project many cool ideas that could be added.. that would make it veeery cool.. if i added more stuff related to MMOs (or massive consistent worlds)

I will throw just a big number to see more clearly the current state of the tech on the mobile arena. For example 10.000 players.

If i wish to create a New version of my offline game.. into a CONSISTENT WORLD targeting android devices for 10.000player x server

Is it technological possible with mobile devices or are we still years away from it?

So far the only viable way to achieve this numbers i see is using SpatialOS? Is it correct? But is it really possible for android at current state? Are there better option more targeting Android maybe? Thanks to share some light? 🤔 🙏

plucky skiff Dec 6, 2019, 1:59 PM

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@viscid bronze have you checked that your CharacterMesh is blocking Visibility channel?

viscid bronze Dec 6, 2019, 2:19 PM

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@plucky skiff its fine, I fixed it by adding another channel called MeleeAttack

twin juniper Dec 6, 2019, 3:13 PM

#

@twin juniper depends of how much events ur game has to send through network and process at the server

#

if your server computes collision and effects of gameplay, no chance, 200 players would kill the fps and network

#

Thanks 🙏 i want to prioritize 10.000players over the game

Then as the years progress and mobile phones become MORE POWERFUL then start adding more game features

#

Want to start from scratch
like with simple cubes

#

most massive games like runecape, has the capacity of 2000 players at one server

#

And building all the way up with 10.000 in mind

#

Oki got yoy

#

but it just send events

#

not compute collision

#

So maybe is better to target 2000

#

At this moment in time

#

Oki got you

#

i would reccomend you target the server to maximum 100 players

fleet raven Dec 6, 2019, 3:16 PM

#

generally people capable of building a mmo that handles 10000 players do not ask questions like this

twin juniper Dec 6, 2019, 3:16 PM

#

Whats your thoufhts about SpatialOS is the way to go?

#

its useless for gameplay purposes has more than 20 players in ur screen

#

so you doesnt has to literally hold all players in the same server

#

@zeblote but as you have expirienced also i guess.. tech is pushing us to use less and less staff to be aible to achibe bigger and bigger games

Maube soon will be possible

#

it is possible, but unless you have a miracle game design

#

its useless

#

But yes i got a idea of the current state

#

Still a bit on the futere

#

if players look more than 20 players at same time in the same place

#

them will get confused

#

and for gameplay its not viable

#

Have you check roblox?

#

I was pretty impressed

#

It seemed pretty large stuff going on there

#

unless ure literally do a design about spam mechanics and unclear targets/objectives

fleet raven Dec 6, 2019, 3:20 PM

#

roblox has 5-10 players per server

twin juniper Dec 6, 2019, 3:20 PM

#

@fleet raven are uou sure?

fleet raven Dec 6, 2019, 3:20 PM

#

it's not a mmo

twin juniper Dec 6, 2019, 3:20 PM

#

Oooohhh..

#

It gamw the impressin then

#

Will dig more on it

fleet raven Dec 6, 2019, 3:21 PM

#

they do have like 100000 server instances though

twin juniper Dec 6, 2019, 3:21 PM

#

Ooooohhh

#

Okey

#

So i guess that sound like insanly expensive

fleet raven Dec 6, 2019, 3:22 PM

#

roblox is a billion dollar project

twin juniper Dec 6, 2019, 3:22 PM

#

its about 100$ / 500- 1000 players

#

montly

#

Its not that bad

#

more expensive if ur game is competitive and have high server update

#

Mmm.. interesting tech

fleet raven Dec 6, 2019, 3:23 PM

#

fitting 1000 players on $100 worth of server will be difficult

twin juniper Dec 6, 2019, 3:23 PM

#

depends of the game

#

Is the SpatialOS a way to explore?

fleet raven Dec 6, 2019, 3:24 PM

#

spatialos is what you use when you have a big investment to put to waste

twin juniper Dec 6, 2019, 3:24 PM

#

I was thinking in the long run 3D adventure game for mobile phones 10.000 players x servers (the ultimate goal in some years) but start building towards the direction

#

With the current tech

#

What i think its appealing from SpatialOS is the Scalability

It's solved

#

Just imagining upgrading hardwares has to be a nightmare

#

Was thinking maybe start getting my feet wet with spatial OS next 2 years.. waiting to more powerful phones.. and then trying to achieve big numbers

#

I haven't heard much competition to SpatialOS any ideas were to watch? 🙏

ocean geyser Dec 6, 2019, 3:35 PM

#

unless your going to be a massive large income title, i would forget spatialOS for now, its just so expensive, awesome, but expensive

twin juniper Dec 6, 2019, 3:36 PM

#

Whats the current lil brother?

#

Cost/effective?

bitter oriole Dec 6, 2019, 3:36 PM

#

It's also not exactly proven as a software.

ocean geyser Dec 6, 2019, 3:37 PM

#

can get a general idea here. plus ^, its a risk
https://improbable.io/pricing

Improbable

Pricing

Understand the details of our free and paid tiers including example game costs...

twin juniper Dec 6, 2019, 3:38 PM

#

But you pay as you use thats pretty attractive

bitter oriole Dec 6, 2019, 3:38 PM

#

Like every similar service

#

Even AWS is cheaper

#

But do the math on the player count, price of your game and average play time

twin juniper Dec 6, 2019, 3:39 PM

#

Yes

#

So between:
Having a Server at my home..

And SpatialOS..

Focus on AWS maybe?

bitter oriole Dec 6, 2019, 3:40 PM

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No commercial game can run from your house

twin juniper Dec 6, 2019, 3:41 PM

#

😂

bitter oriole Dec 6, 2019, 3:41 PM

#

And I don't know anything about your game so

#

Personally I would never even attempt a live game, but hey

ocean geyser Dec 6, 2019, 3:41 PM

#

player hosted ftw

twin juniper Dec 6, 2019, 3:42 PM

#

innovate and create a torrent like network, where all ur clients are also servers

#

die after some days of logic issues

ocean geyser Dec 6, 2019, 3:43 PM

#

like pied piper (if you get the reference)

twin juniper Dec 6, 2019, 3:43 PM

#

BitcoinStyle (blochchain)

#

Users ming the game

#

How did Notch took from SCRATCH minecraft? Anybody heard what hardware did he started with?

#

Could not be fancy at the early days

fleet raven Dec 6, 2019, 3:46 PM

#

minecraft uses player hosted servers..

twin juniper Dec 6, 2019, 3:46 PM

#

From day one?

#

Let me recap
Minecraft if i dont remember wrong.. you had to pay 20$ to get online.. (notch was hosting)
How exactly players hosted the game?

twin juniper Dec 6, 2019, 4:15 PM

#

What about the UnrealOnline services with all the Fortnite fresh cash.. will we see anything soon or not? alex

Have been waiting since September
Could this be a GameChanger to the current status quo? 😎 💪

#

We are already december

#

Is it around the corner?

thin stratus Dec 6, 2019, 5:40 PM

#

What about the UnrealOnline services with all the Fortnite fresh cash.. will we see anything soon or not?
No one here can answer that for you.

bitter oriole Dec 6, 2019, 5:43 PM

#

It's very unlikely to release in a usable state before 2021

ember slate Dec 6, 2019, 5:49 PM

#

Yo, how to specify the maximum number of players in a game in the game mode?

twin juniper Dec 6, 2019, 6:06 PM

#

I think Sweeney will make us VEEEEEEERY HAPPYY soooon.. 🤩

#

2021?!? 😅 😅 😅

bitter oriole Dec 6, 2019, 6:10 PM

#

It took a decade for Steam

twin juniper Dec 6, 2019, 6:12 PM

#

Maybe i understood him wrong on GDC but i undeestood like we will get more or less SPATIALOS servers services for free.. right? Was that the promise? I felt like.. 🤯 😎 spoiled! 🥳

jolly siren Dec 6, 2019, 6:22 PM

#

How can I switch which player controller the local player is using?

#

When the local player dies I want to switch them to a different playercontroller

bitter oriole Dec 6, 2019, 6:27 PM

#

@twin juniper No, not at all

#

Epic is not going to offer hosting

#

At best, in some time, we'll get cross-platform matchmaking services

split drum Dec 6, 2019, 6:27 PM

#

@ember slate You set MaxPlayers in the GameSession, not GameMode

bitter oriole Dec 6, 2019, 6:28 PM

#

@jolly siren Generally speaking you can't.

#

The idea of player controller is that, well, it's literally the player

#

As far as the code goes

jolly siren Dec 6, 2019, 6:30 PM

#

ahh okay makes sense 🙂

ember slate Dec 6, 2019, 6:30 PM

#

@split drum That sounds kinda odd tbh but okay

split drum Dec 6, 2019, 6:33 PM

#

🤷‍♂️

twin juniper Dec 6, 2019, 6:39 PM

#

@bitter oriole ooohh.. what a Anticlimax! 😅

#

Am setting up SpatialOS

And having a slightly problem when downloading the LINUX CROSS-COMPILATION TOOLCHAIN

By some reason unreal websites does not work to download it again.
By anychance somebody has a copy on their pc handy to share?
🙏 it sucks to not beeing able to install it. 😅 am thinking the version v13

#

📎 Screenshot_20191206-194801_Samsung_Internet.jpg

#

https://docs.improbable.io/unreal/alpha/content/get-started/dependencies

Get started

Build game worlds where everything matters

ocean geyser Dec 6, 2019, 7:05 PM

#

even after everyone recommended against using that for your project lol

desert glacier Dec 6, 2019, 7:06 PM

#

how open level for the host Without the open for client ?

red pollen Dec 6, 2019, 7:07 PM

#

I'm pretty sure @desert glacier

#

If you're using a listen server

#

You can Open Level on the host, and the others won't follow

#

Might be wrong though

desert glacier Dec 6, 2019, 7:08 PM

#

just with a command who has for text listen server ?

surreal laurel Dec 6, 2019, 7:08 PM

#

for others to follow you need to call servertravel

twin juniper Dec 6, 2019, 7:08 PM

#

@ocean geyser 😂 dude whats the alternative? Server in my home?

ocean geyser Dec 6, 2019, 7:09 PM

#

nah man, make a waterproof rig and run it off of your local colleges wifi

desert glacier Dec 6, 2019, 7:10 PM

#

a server travel and open level text ?

ocean geyser Dec 6, 2019, 7:11 PM

#

you might want to consider exposing a c++ function to blueprint that simply takes in the map name. ive had issues trying to do server travel with blueprint in the past

#

so the server travel is done via c++

red pollen Dec 6, 2019, 7:12 PM

#

Server travel via blueprint works fine by me, however that's not what he is asking

#

@desert glacier , use the Open Level Blueprint

#

Not console command to run servertravel

ocean geyser Dec 6, 2019, 7:13 PM

#

oh derp, didnt scroll up. sorry

desert glacier Dec 6, 2019, 7:13 PM

#

with a open level ? not console command ?

red pollen Dec 6, 2019, 7:14 PM

#

correct

#

this way, only the host will be sent to the level, like you've asked.

twin juniper Dec 6, 2019, 7:14 PM

#

@ocean geyser jijijiji 😂 your are killing me dude!

red pollen Dec 6, 2019, 7:14 PM

#

console command = all players
open level = only client that runs

desert glacier Dec 6, 2019, 7:15 PM

#

i will like only on the server not client

red pollen Dec 6, 2019, 7:15 PM

#

Are you running dedi or listen?

ocean geyser Dec 6, 2019, 7:16 PM

#

i feel like there was someone who was asking the exact same question about 3 or so weeks ago on doing this

red pollen Dec 6, 2019, 7:17 PM

#

What's the purpose? Why would you want a server to be on a map while players aren't?

hoary lark Dec 6, 2019, 7:25 PM

#

I know it's been said in here at least once by generally very knowledgeable people that it isn't possible... But I've never personally verified or tried

split drum Dec 6, 2019, 7:27 PM

#

@red pollen my (limited) understanding is the server could be hosting a game mode, like a come-and-go deathmatch. The player / client may open the game to a main menu map and set various options. When the client clicks 'connect to server' somewhere they use 'open level' to connect to the dedicated server and join the game

red pollen Dec 6, 2019, 7:28 PM

#

Oh yes, of course. This has been done lots, so the dedicated server is running a play map and then the client connects to it. I see.

#

Hard to test on UE4 though without packaging every time.

split drum Dec 6, 2019, 7:30 PM

#

well, you can set the editor default map to the 'play map' or the 'menu map' for testing purposes

ocean geyser Dec 6, 2019, 7:31 PM

#

@red pollen is this relevant to you? this is how i test dedicated outside the editor with multiple clients on the same machine to make sure its functional without packaging
https://www.youtube.com/watch?v=_XW9oI36kTE

YouTube

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

red pollen Dec 6, 2019, 7:31 PM

#

I don't need this, my game uses listen servers, but I'll still check this out. Thanks.

#

My query at the minute is with name plates. I've got the name plate to show when you look at a player, but the positioning is always too low or too high, and it changes when I move closer / further away, if anybody knows about this let me know 😄

split drum Dec 6, 2019, 7:33 PM

#

Not sure of why you would use the approach in that video, if you want to fire up the dedicated server with independent clients you can turn off 'single process' then launch using 'Play->Standalone Game'

desert glacier Dec 6, 2019, 7:33 PM

#

@red pollen not dedicated server

#

so server travel ?

red pollen Dec 6, 2019, 7:34 PM

#

Okay... Ryland, can you explain your situation?

#

Like I said earlier, if you use server travel, all connected clients are teleported to the new map

#

What context? Why would a listen server be on a map that it's client isn't?

ocean geyser Dec 6, 2019, 7:36 PM

#

@split drum its just very quick for me to launch 1 batch file for the server and X amount for however many clients i need and test

desert glacier Dec 6, 2019, 7:39 PM

#

No just for server , Nothing for the clients

winged badger Dec 6, 2019, 7:40 PM

#

you move the listen server host on another map by itself and all the clients get booted to main menu immediately

ocean geyser Dec 6, 2019, 7:41 PM

#

can you state the reason for this so someone can suggest a workaround

desert glacier Dec 6, 2019, 7:42 PM

#

Nothing for the clients,same the server goes

ocean geyser Dec 6, 2019, 7:42 PM

#

whats the purpose behind what you are trying to do is what im asking. why must you have the server go to a separate level

desert glacier Dec 6, 2019, 7:43 PM

#

for go to MAIN MENU

#

when it quit game by the menu of pause

#

when it quit game by the menu of pause

ocean geyser Dec 6, 2019, 7:44 PM

#

if your just trying to have the server open the main menu while ingame then your better off adding your main menu widget to the viewport and enabling things such as your mouse cursor so the player can navigate the menu and reversing that when he closes it

#

if your just trying to have the server open the main menu while ingame then your better off adding your main menu widget to the viewport and enabling things such as your mouse cursor so the player can navigate the menu and reversing that when he closes it

winged badger Dec 6, 2019, 7:45 PM

#

thats just OpenLevel MainMenuLevel

#

nothing to it

desert glacier Dec 6, 2019, 7:47 PM

#

i have a system for number player

#

when a player quit a session ,he is Always account in the player of the session

opal bay Dec 6, 2019, 7:59 PM

#

Probably a better place for my question:

Hey folks, anyone managed to get a dedicated server build running on linux (and built from linux, not cross-compiled?)

bitter oriole Dec 6, 2019, 8:06 PM

#

Building from Linux is not supported officially

#

Epic recommends cross-compiling because it results in a more controlled environment

#

If you're familiar with Linux and the compilation process on Windows it should work out with minimal changes

potent prairie Dec 6, 2019, 9:08 PM

#

I build my linux servers on my PC, you just have to download the toolchain epic provides and its pretty easy

opal bay Dec 6, 2019, 9:17 PM

#

If you're familiar with Linux and the compilation process on Windows it should work out with minimal changes

I thought so too. And I'm really close. But haven't quite managed it yet

#

My built code complains about not having cooked data, and my BuildRunCook fails looking for the "plugin" that is my Server target

bitter oriole Dec 6, 2019, 9:25 PM

#

What's the log like ?

cedar finch Dec 6, 2019, 10:21 PM

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I need some help with optimizing my replication of a moving actor along a spline. So below is how I currently have it setup, but it's lagging the clients to death. How can I replicate this more efficiently? https://gyazo.com/afc8d01f5f265b817d877bf938bbecd5

Gyazo

opal bay Dec 6, 2019, 10:30 PM

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@bitter oriole The line that seems most relevant is:

LogInit: Warning: Incompatible or missing module: MyTestServer

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It prints that twice and then subsequent lines are modules shutting down

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And in the file log, eventually a "cook failed" line

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I have made progress, though, it was complaining about other modules before

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Not quite sure how I fixed that. May've been additions to the uproject file

grizzled stirrup Dec 6, 2019, 10:44 PM

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If you want the player to be able to play modes offline, is it better to use UGameplayStatics::OpenLevel() or GetWorld()->ServerTravel() when traveling to the offline level?

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Or do you need an active session for ServerTravel to work?

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Or should I just create a regular session as with the online version of the mode, but have the max players set to 1 and have it not be advertised?

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Probably easiest to avoid duplicating code

winged badger Dec 7, 2019, 12:28 AM

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Server travel will just send a ClientRPC to all connected controllers to move

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and the url to move to

steep cliff Dec 7, 2019, 1:09 AM

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https://youtu.be/nh54BLLvcdM

YouTube

KinematicSoup

Multiplayer Games Should all be this awesome

Imagine what you could build if there were no limits...

▶ Play video

cedar finch Dec 7, 2019, 2:55 AM

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So recently I've started to notice replicated things not working while testing "In-Editor" things such as sounds not playing and stuff. They play in standalone and packaged. I was wondering if I was doing something wrong? Someone told me I needed to increase the Default Max bandwidth of 50KBs. Is that something I need to do?

worthy perch Dec 7, 2019, 2:56 AM

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Open the netprofiler, see if you're net saturated.

cedar finch Dec 7, 2019, 3:03 AM

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I've never used it before. Do I just type netprofile in console when playing in editor?

worthy perch Dec 7, 2019, 3:06 AM

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You can use stat net for the in engine one or netprofile enable for the more indepth one.
https://docs.unrealengine.com/en-US/Gameplay/Tools/NetworkProfiler/index.html

cedar finch Dec 7, 2019, 3:06 AM

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Ok thanks. I may have to research it a bit.

cedar finch Dec 7, 2019, 4:59 AM

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@worthy perch Thank you so much! I ran the netprofile tool and found that I was calling an RPC inside of a timeline that never ended. It was replicating an actors location as it moved thus eating up the bandwidth because i had a bunch of them in the level. I got rid of it and now I'm good 🙂

rich ridge Dec 7, 2019, 7:34 AM

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Hi all, I want to update my Discovery to all.
I installed Linux Subsystem in Windows 10 and after that in bash I can execute my Linux Dedicated server. Sow what it means is that we can test your Linux Dedicated server inside windows only.

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I hope this helps to all.

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Is there a way to exclude the content from sever builds. Are those contents really need for server builds.

worldly hollow Dec 7, 2019, 8:24 AM

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Hey guys,

Im pretty new to multiplayer in unreal. But I love MP games so I want to learn how to go about creating MP games.

I just have a question regarding, idk, workflow. When you have a particular feature in mind, e.g. a leap mechanic (in an MP game), u press hold down a key, you leap (with animation + particle effects).

do you FIRST code it in the most basic way possible to test the feature/mechanic out (so not replicated) and if your logic is sound and everything works THEN begin to convert everything that needs to be replicated?
Or
you, from the very beginning, have all the necessary values/events set to replicated ?

i am following a course on udemy and he seemed to make the feature work only client side, then once thats done and functions correctly, he'd make everything replicated and test the replicated version out

rich ridge Dec 7, 2019, 8:37 AM

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@worldly hollow According to me it depends person to person and his grasp on the framework. There is no good way or bad way, If someone is extremely experienced with replication and networking then he may directly start with all the logics regardless of whether he is client or server and for him it may work on first run. Its totally how much you are cmfrtable.

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Since you are learning, its good if you setup first for client and then server. This will help you understand how system works and make you more familiar for UE

worldly hollow Dec 7, 2019, 9:38 AM

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@rich ridge thanks for the advice! Yeah I think I'll do the setup first in client. This way I also see step-by-step what happens when certain variables/events are not replicated. Might help for troubleshooting later on : )

hoary sandal Dec 7, 2019, 10:30 AM

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guys I'm learning about actor ownership and RPC events, this button is driving me crazy, so essentially what happens is that you get to the trigger sphere component, and you can press E and it will send a interface message to activate, the problem is the event doesn't pass the has authority node but when I change things around and I put the even at the end of the overlap it works, why is this behaviour happening ?

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https://gyazo.com/72deed42855604ecf7c72ad5f166d3e5

Gyazo

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this one works

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https://gyazo.com/f409bf15f962989ce4037be8f6407536

Gyazo

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in this one the client cannot trigger it

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https://gyazo.com/5bf06f62f880e3c0da939311fdd41e50

Gyazo

▶ Play video

gritty lodge Dec 7, 2019, 10:55 AM

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Does anyone know a method for generating collision on a server while the players use a level streamed level? Is there a way to tell the server to load the same level the players are on so that the collision matches?

winged badger Dec 7, 2019, 11:03 AM

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@hoary sandal stop and think for a second about where (on which machines) the overlap code executes

hoary sandal Dec 7, 2019, 11:13 AM

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@winged badger probably it gets handle by the server that's why it has authority

winged badger Dec 7, 2019, 11:14 AM

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there can be thousands of collisions happening each frame

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not really possible to replicate

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so collisions happen on every machine, independently

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= that OnOverlap event gets executed by your server and by each of your clients

hoary sandal Dec 7, 2019, 11:20 AM

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@winged badger while that's a good point I don't think is the case, you can see in this clip that the client is sending the information to the server and they both get the same https://gyazo.com/7e0dd3eea5561d4a02f5bb7f8b1b1a6e

Gyazo

▶ Play video

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it has to be something like the actor owner, this is an actor placed in the level which if I'm not mistaking those belong to the server, I'm sending an interface call from my player controller to this actor

royal isle Dec 7, 2019, 12:18 PM

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Hey, I am having a really weird bug where some player state variables persist after a non-seamless travel and also whenever a player disconnects and reconnects on the server. Any idea why that might be?

rich ridge Dec 7, 2019, 12:45 PM

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I m getting NULL for Local player on dedicated server.

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ULocalPlayer* const Player = GameInstance->GetFirstGamePlayer();
if (Player == NULL) {
UE_LOG(LogTLPServer, Error, TEXT("LOCAL PLAYER IS NULL"));
return;
}

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but i case of listen server its not null

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the reason being, dedicated server don't have any player at all. So its NULL

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So how to I get the GetUniqueNetId for creating the game session on server

royal isle Dec 7, 2019, 12:54 PM

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@rich ridge just put 0 in the CreateSession call, it will then use the overload that takes in a player number rather than a unique Id

rich ridge Dec 7, 2019, 12:55 PM

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@royal isle yeah that's what I was thinking, thanks for help

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@royal isle Yes it worked

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@royal isle Yes it will persist the player state whenever a player disconnects and reconnects on the server

royal isle Dec 7, 2019, 1:21 PM

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So I need to reset it manually?

rich ridge Dec 7, 2019, 1:21 PM

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/** PlayerStates of players who have disconnected from the server (saved in case they reconnect) /
UPROPERTY()
TArray<class APlayerState> InactivePlayerArray;

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From GameMode

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/** Time a playerstate will stick around in an inactive state after a player logout */
UPROPERTY(EditAnywhere, Category=GameMode)
float InactivePlayerStateLifeSpan;

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Override this method in your game mode

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/** Handles when a player is disconnected, before the session does /
virtual void HandleDisconnect(UWorld InWorld, UNetDriver* NetDriver);

royal isle Dec 7, 2019, 1:54 PM

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Thanks a lot @rich ridge

rich ridge Dec 7, 2019, 1:55 PM

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😎

rich ridge Dec 7, 2019, 2:22 PM

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Why OnlineSubsystemNull is used?

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do i need to use this when I m not playing over LAN

fleet raven Dec 7, 2019, 2:37 PM

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you don't need to necessarily

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we do player hosted servers with no subsystem

rich ridge Dec 7, 2019, 2:47 PM

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@fleet raven so if I m not using LAN, then I need to do open 123.123.234.87:8080

fleet raven Dec 7, 2019, 3:05 PM

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that's one way

rich ridge Dec 7, 2019, 3:07 PM

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What's another way

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I haven't worked on multiplayer aspect of UE4, so I don't have much idea on this region

rich ridge Dec 7, 2019, 6:36 PM

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is there any callback for void APlayerController::ClientTravel(const FString& URL, ETravelType TravelType, bool bSeamless, FGuid MapPackageGuid)

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I know that GameInstance receives a notification just before travel starts

trim geyser Dec 7, 2019, 6:37 PM

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Theres a GameModePostLoginEvent you can subscribe to

rich ridge Dec 7, 2019, 6:38 PM

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But this will only run on GameMode

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what about clients

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@trim geyser I already have this setup

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or the server sends broadcast to client that travel is successful

trim geyser Dec 7, 2019, 6:41 PM

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One way though not the best would be to subscribe to worlds being created

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One way though not the best would be to subscribe to worlds being created

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you can check if your client/server by GetAuthGameMode()

rich ridge Dec 7, 2019, 6:42 PM

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so basically engine doesnot provide any callback right now

trim geyser Dec 7, 2019, 6:42 PM

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It probably does somewhere ya just have to find it

fleet raven Dec 7, 2019, 6:43 PM

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pretty sure theres a PreClientTravel delegate somewhere

trim geyser Dec 7, 2019, 6:43 PM

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I think he wants one when the clients join

rich ridge Dec 7, 2019, 6:43 PM

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I want client to get notified

fleet raven Dec 7, 2019, 6:44 PM

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? ClientTravel is a client sided function

rich ridge Dec 7, 2019, 6:44 PM

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that travel is successfull or fail

fleet raven Dec 7, 2019, 6:44 PM

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? ClientTravel is a client sided function

rich ridge Dec 7, 2019, 6:44 PM

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yes

fleet raven Dec 7, 2019, 6:44 PM

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to know if it failed you have the network error and travel error methods

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on game instance

rich ridge Dec 7, 2019, 6:45 PM

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ok yeah that's what i was looking for

fleet raven Dec 7, 2019, 6:45 PM

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if it fails, it will run those and then immediately travel to the main menu/default map

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so in your callback you should save that an error happened and then check for it when initializing your main menu ui

rich ridge Dec 7, 2019, 6:46 PM

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yes this makes sense

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can u please explain other way of connecting to dedicated server other then open IP

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can u please explain other way of connecting to dedicated server other then open IP

ocean geyser Dec 7, 2019, 6:47 PM

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onlinesessions

rich ridge Dec 7, 2019, 6:48 PM

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@ocean geyser how

ocean geyser Dec 7, 2019, 6:48 PM

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tf if i know

fleet raven Dec 7, 2019, 6:48 PM

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sessions are part of the online subsystem framework

ocean geyser Dec 7, 2019, 6:49 PM

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📎 MyCrappyGameInstance.cpp

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i do player hosted in here, but it should give you an idea

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keep in mind i had 0 clue what i was doing during this

rich ridge Dec 7, 2019, 6:50 PM

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ok checking

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ok checking

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@ocean geyser u r doing travel, right.

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@ocean geyser u r doing travel, right.

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@ocean geyser u r doing travel, right.

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so how it is different than mine void APlayerController::ClientTravel(const FString& URL, ETravelType TravelType, bool bSeamless, FGuid MapPackageGuid)

ocean geyser Dec 7, 2019, 9:14 PM

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@rich ridge man discord took a crap on me, none of my mesages sent and couldnt even load it. readup on what the online subsystem does, this allows for you to do things such as register your session online and have other clients find it and such without having to already know the IP address and such and connect manually that way. its still using server/client travel, but its sort of handled automatically (not really but im not sure how to explain it) so the client/player does not have to do everything themselves manually to join a specific server. this allows for server browsers/lists and such or automatic joining when a valid session is found

full elbow Dec 7, 2019, 9:25 PM

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anyone ever come up with a way to handle client side AI navigation for a top down point + click style game?

subtle patio Dec 7, 2019, 10:45 PM

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Are arrays replicated in order? I'm getting different orders between server and clients

fossil spoke Dec 7, 2019, 10:46 PM

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There is no guarantee that the Array will replicate in the same order no

subtle patio Dec 7, 2019, 10:48 PM

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well that explains my issue

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so in order to identify specific objects or simulate an order - a replicated ID needs to be stored on the element class?

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or something to that effect?

fossil spoke Dec 7, 2019, 10:50 PM

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Yeah you would need some method to identify elements on either side to be able to rebuild the Array correctly.

subtle patio Dec 7, 2019, 10:51 PM

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@fossil spoke you've saved me a headache - thanks#

knotty crown Dec 7, 2019, 11:32 PM

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📎 Capture.PNG

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📎 Capture2.PNG

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I get this output from "Get Controller" It does not return anything on the server, is there any way to get a pawn's controller on the server?

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📎 Capture.PNG

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📎 Capture2.PNG

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I know that some sort of player controller exists on the server, and thats what I'm trying to get, but I want to be able to get the one that is specific to the pawn that calls it, instead of a hard coded player index

spice skiff Dec 7, 2019, 11:48 PM

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dedicated server is headless. what are you trying to do?

knotty crown Dec 7, 2019, 11:56 PM

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📎 Capture.PNG

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📎 Capture2.PNG

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I'm trying to have the pawn that dies call an event on the gamemode to respawn it.

gritty lodge Dec 8, 2019, 12:10 AM

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How do you load a level on a server (for collision) that is being level streamed on clients? Or how do you replicate the level streamed level's collision on the server?

spice skiff Dec 8, 2019, 12:22 AM

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@knotty crown when i set up respawn on my multiplayer shooter i tried using gamemode also initially, but found out that clients cannot send information to gamemode. I ended up sorting death and respawn in the character blueprint

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@knotty crown only thing i used gamemode for was the timer of the match and and blocking others to join match if in progress and waiting for all players to join before starting.

knotty crown Dec 8, 2019, 12:30 AM

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OK, but I don't want the clients to be sending info to the server asking for a respawn, I want the server to dictate when the clients respawn. The dedicated server should have all of the information to handle respawning of clients without having to ask them for any data right?

spice skiff Dec 8, 2019, 12:38 AM

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@knotty crown the server can receive information when client dies, can be checked in player character or controller, then you can run server rpc's in character blueprint or controller no need to send to gamemode for server replication

knotty crown Dec 8, 2019, 12:52 AM

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Sorry, I'm not sure I understand you. Are you saying that the client should tell the server when he dies? I'm not sure if that is what you are saying, but if it is then I disagree, I don't think the client should have to send any info to the server when they die, I think that the server should be the one telling the client that they have died.

ocean geyser Dec 8, 2019, 12:59 AM

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^

red pollen Dec 8, 2019, 1:03 AM

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Hello there. I'm having some trouble getting a part of my game to work. I'm having a lobby, and then when the host clicks the start match, each player is transported to the level / map. What I need to know is how can I tell when all players have successfully loaded into the map, have been spawned and have had their player controllers assigned etc.

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I'm trying to allow everybody to spawn and have their hud added to viewport etc, and then have a countdown in the gamemode start to tick for when the game should commence.

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Has anybody got this to work? Currently, the listen server client spawns in, gets the countdown and the game begins for them, but all other players just don't get the countdown on their hud widget, it's like they aren't loaded in before the game starts.

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Also, when do players get added to the Player Array? I'm trying to run a foreach loop on this array, but it's almost like when I'm calling it, it's empty, as no players have been added to the array

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The player array being in the game state, and I've been getting a reference to it in my game mode on the begin play node.

knotty crown Dec 8, 2019, 1:09 AM

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@red pollen https://isaratech.com/ue4-network-multiplayer-in-blueprints-getting-started/

Isara Tech.

isaratech

UE4 - Network Multiplayer in Blueprints - Getting Started - Isara ...