#multiplayer | Unreal Source | Page 405

dull stream Jul 2, 2018, 7:08 AM

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Theres a lot of mentioning of host, not so much about client. Not sure what difference between host and hostobject is though but I'd say its one of those two

thin stratus Jul 2, 2018, 7:09 AM

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The classes arent much different from the normsl ones

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Just the whole "has to be actively on the server" stuff is gone

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You have the Lobby or PartyState which is the GameState

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That thing replicates irrc and exists once

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Then you can have a PlayerState like object per Player

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And the Host and Client stuff is just for connecting

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You should try a minimum setup first, before going to use the lobby and Party stuff

dull stream Jul 2, 2018, 7:16 AM

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The PartyBeaconState is a member in the PartyBeaconHost class. I dont see it in PartyBeaconClient.

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it gets created in InitHostBeacon function in PartyBeaconHost.cpp

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I do not see it being created Client side

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assuming "host" means server side only

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its actually kinda weird because PartyBeaconState is being included in the client header file, but its not being used. I also dont see a CPP file for PartyBeaconClient

thin stratus Jul 2, 2018, 7:26 AM

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See the Host as a GameMode

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Thats server only

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The State gets created in it

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Isnt it flagged as replicated?

dull stream Jul 2, 2018, 7:27 AM

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PartyBeaconState? No it isnt.

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📎 unknown.png

dull stream Jul 2, 2018, 7:54 AM

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Starting to think this is a bug with the editor, I dont see anything wrong with it, its just not behaving like it should

umbral adder Jul 2, 2018, 8:37 AM

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https://cdn.discordapp.com/attachments/456099361219280906/463261535956107264/unknown.png

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https://cdn.discordapp.com/attachments/456099361219280906/463261578448470016/unknown.png

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do you know why i am getting this error? @dull stream

dull stream Jul 2, 2018, 8:40 AM

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Uhhhhh

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Is there a reason you are using BeaconState rather than State

umbral adder Jul 2, 2018, 8:43 AM

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?

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no

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just following the tutorial

dull stream Jul 2, 2018, 8:44 AM

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hmm

umbral adder Jul 2, 2018, 8:44 AM

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https://forums.unrealengine.com/community/community-content-tools-and-tutorials/1355434-onlinebeacons-tutorial-with-blueprint-access

Unreal Engine Forums

Hey everyone,

I noticed that this is covered very little in the official docs and around the web. You can find tidbits here and there, but not a full example that

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is for hostobject

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but i am using partyhostoject

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/** State of beacon */
    EBeaconState::Type BeaconState;

dull stream Jul 2, 2018, 8:45 AM

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Im really not sure hahah. You probably know more than me. I was reading source earlier to try to figure out where PartyBeaconState was being used... all I really know is that in the PartyBeaconHost object there exists a "State"

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I see.

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Okay so thats not anything to do with the party beacon you were talking about before

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party beacon state I mean

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Where is InitHost defined

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or declared rather

umbral adder Jul 2, 2018, 8:47 AM

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HostBeaconObject

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dont think ur gonna help 😛

dull stream Jul 2, 2018, 8:48 AM

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is your class derived from that? PartyBeaconHost derives from OnlineBeaconHostObject

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and

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OnlineBeaconHostObject derives from AActor

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I dont think InitHost is a valid function in your class, and thats why its having trouble compiling

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that tutorial is from sept 2017, the architecture might have changed?

umbral adder Jul 2, 2018, 8:50 AM

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hm..

dull stream Jul 2, 2018, 8:51 AM

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this does seem bleeding edge so it could be going through a lot of changes

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I think you want InitHostBeacon()

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maybe?

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📎 unknown.png

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does that sound relevant

umbral adder Jul 2, 2018, 8:53 AM

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1sec

dull stream Jul 2, 2018, 8:53 AM

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sure thing

umbral adder Jul 2, 2018, 8:54 AM

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bool APartyBeaconHost::InitFromBeaconState(UPartyBeaconState* PrevState)
{
    if (!State && PrevState)
    {
        UE_LOG(LogBeacon, Verbose, TEXT("InitFromBeaconState TeamCount:%d TeamSize:%d MaxSize:%d"), PrevState->NumTeams, PrevState->NumPlayersPerTeam, PrevState->MaxReservations);
        State = PrevState;
        return true;
    }

    return false;
}

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i see this

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do i have to spawn the beacon state?

dull stream Jul 2, 2018, 8:54 AM

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ooo yeah

umbral adder Jul 2, 2018, 8:55 AM

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@thin stratus tells it's like a game state but i cant select it in my gamestate

dull stream Jul 2, 2018, 8:57 AM

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Im not sure where this BeaconState is, I dont see it anywhere. So that might also be deprecated. It seems to me like PartyBeaconState is the cool new hip thing now but idk. I would be using that, its called "State" in the ParyBeaconHost and it gets created in InitHostBeacon function

umbral adder Jul 2, 2018, 8:58 AM

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ok

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i am a noob to cpp

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so, just wanted to ask how would i set the feilds in the function

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📎 unknown.png

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ASPartyHostObject::InitHostBeacon(int32 InTeamCount, int32 InTeamSize, int32 InMaxReservations, FName InSessionName, int32 InForceTeamNum)
{
    InTeamCount = 
    return;
}

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after the =?

dull stream Jul 2, 2018, 8:59 AM

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Dunno. Maybe its something you decide in your gamemode. 🤔

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Im kinda guessing though

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I have no clue how to use this stuff. Im just using Agent Ransack to search the engine source, and then reading it. I dont understand the architecture at all.

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I wanna try to help though just to be exposed to this stuff

thin stratus Jul 2, 2018, 9:00 AM

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It's LIKE a GameState

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Just so you can wrap your head around it

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Beacons have nothing to do with GamePlay

umbral adder Jul 2, 2018, 9:01 AM

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ok

thin stratus Jul 2, 2018, 9:01 AM

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They aren't used in the game

umbral adder Jul 2, 2018, 9:01 AM

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so just Spawn actor like usual?

thin stratus Jul 2, 2018, 9:01 AM

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They are connections for lobbies or parties that exist outside of the game. In the Menu for example.

umbral adder Jul 2, 2018, 9:01 AM

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yes , i want it for menu

thin stratus Jul 2, 2018, 9:01 AM

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Just look at how the Lobby or Party Beacons are done in the Source

umbral adder Jul 2, 2018, 9:02 AM

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ok thanks

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ASPartyHostObject::InitHostBeacon(int32 InTeamCount, int32 InTeamSize, int32 InMaxReservations, FName InSessionName, int32 InForceTeamNum)
{
    InTeamCount = 
    return;
}

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how do i hard code the values?

dull stream Jul 2, 2018, 9:03 AM

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what are you doing there with "InTeamCount =" ?

umbral adder Jul 2, 2018, 9:04 AM

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hard code it to a value

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also what is FName Insessionname?

dull stream Jul 2, 2018, 9:06 AM

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I think InitHostBeacon is a function you want to call when you spawn the actor.

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so lets say you are in your menu or whatever, you spawn your beacon. Then you call myBeacon->InitHostBeacon(teamcount, teamsize, reservations, sessionName, forceTEamNum);

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but again, Im not really sure how to USE beacons because Ive never used them myself

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so i could be totally wrong

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however, I will say, I dont think manually assigning InTeamCount like that in an overridden function is the right way

umbral adder Jul 2, 2018, 9:08 AM

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i am not overriding

dull stream Jul 2, 2018, 9:08 AM

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you arent?

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isnt InitHostBeacon being overridden in your derived class?

thin stratus Jul 2, 2018, 9:09 AM

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InitHostBeacon is from the APartyBeaconHost

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And it's virtual, so yes

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The default impl just creates the BeaconState

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And calls InitState on it

dull stream Jul 2, 2018, 9:10 AM

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yeah

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ok its 4AM I should go to sleep good luck decode

umbral adder Jul 2, 2018, 9:11 AM

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Night!

wary wyvern Jul 2, 2018, 9:26 AM

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Hey guys! I have OnRep pointer variable, and I want to set it to nullptr (server side), but OnRep does not get called on clientside.. If I change the value to another object, OnRep fires as expected..

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void UTargetingComponent::ClearTarget()
{
    RepCurrentTarget = nullptr;
    UE_LOG(LogTemp, Log, TEXT("Target cleared!")); // Called on SERVER
}

void UTargetingComponent::OnRep_CurrentTarget()
{
    UE_LOG(LogTemp, Log, TEXT("Rep target!")); // Does NOT get called on CLIENT
}

thin stratus Jul 2, 2018, 9:28 AM

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You can try to force a net update

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Not sure right now why that wouldn't call the OnRep

wary wyvern Jul 2, 2018, 9:32 AM

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Hmm, it's get called, if I manually call ClearTarget() after a delay..

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Ok, it was my mistake. I set this variable to same value later this tick.

bronze arch Jul 2, 2018, 11:50 AM

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Hello everyone. How i can, not destroy character after leave game?
i did to gamemode in image code but not work :/

📎 36335965_2071624929826382_1482975980229230592_n.png

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i doing separate controller and the character when out character still ingame

meager spade Jul 2, 2018, 11:58 AM

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so swapping pawns but keeping old pawn in gameplay?

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confused

thin stratus Jul 2, 2018, 12:00 PM

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When you leave a game, your pawn usually gets cleaned up

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He doesn't want that

summer nova Jul 2, 2018, 12:04 PM

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@thin stratus i was planning something, and wanted your opinion

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my game has missions that can go through multiple maps, and im also using seamless when i can

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for that reason, the game mode essentially becomes completely worthless

bronze arch Jul 2, 2018, 12:05 PM

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yeah @thin stratus did read my mind 😄

summer nova Jul 2, 2018, 12:05 PM

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i was planinng on making my own version of game mode, but that goes through levels and can be switched directly, to control that flow better

thin stratus Jul 2, 2018, 12:05 PM

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Shouldn*t the GameMode come with ways to react to Seamless Travel?

summer nova Jul 2, 2018, 12:05 PM

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as an uobject stored in the game instance

thin stratus Jul 2, 2018, 12:06 PM

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You can also always put actors into the SeamlessTravel list

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To make them survive

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You could use AGameModeBase::GetSeamlessTravelActorList

summer nova Jul 2, 2018, 12:08 PM

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my main issue is the part where i need to switch gamemode

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how do i switch gamemode in seamless

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thats why i was thinking on my own Mission Manager separated from gamemode

thin stratus Jul 2, 2018, 12:08 PM

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That happens automatically

summer nova Jul 2, 2018, 12:08 PM

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and gamemode essentially being dummy

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gamemode doesnt switch in seamless, it keeps being there

thin stratus Jul 2, 2018, 12:08 PM

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Not if the class is different

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And what's the problem with it staying?

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If you want to keep your Mission data

summer nova Jul 2, 2018, 12:09 PM

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i want it to change

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the flow i want to have is something like warframe

thin stratus Jul 2, 2018, 12:09 PM

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If your new Map has a different GameMode,. it will change

summer nova Jul 2, 2018, 12:09 PM

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i have a lobby (wich would be MP), and then a mission is selected

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then the mission goes to its map, it has its own gameplay and rules, and can be multiple levels (for example, multiple floors in a dungeon)

thin stratus Jul 2, 2018, 12:10 PM

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I have a setup with a lobby map "BP_GM_Lobby" and then different GameModes, e.g. "BP_GM_DM" or "BP_GM_TDM"

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Seamless Travel properly changes the GM

summer nova Jul 2, 2018, 12:10 PM

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uhm.. will look into it

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i also will need some minor match recovery

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if the host leaves

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i was thinking on keeping some of the game data in the game state, to get replicated. Including a list of the different IP/connection of the players. When the host leaves, the next player in the list will try to host a match, and the other players will try to connect to him

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going down the list with timeouts if there are issues

thin stratus Jul 2, 2018, 12:15 PM

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Yeah you can try that. It's not easy, specially since UE4 has no HostMigration feature

summer nova Jul 2, 2018, 12:16 PM

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i cant handle actually hosting the servers myself. soo....

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P2P

thin stratus Jul 2, 2018, 12:16 PM

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Hm?

summer nova Jul 2, 2018, 12:16 PM

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hosting the servers needs money and knowledge of cloud infraestructure

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i have none

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i still plan to host the servers for the lobby

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becouse the lobby would need to be a lot more stable as people is logging in/out constantly

bitter oriole Jul 2, 2018, 12:17 PM

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Be sure to stick to cooperative play if you're going with listen servers

summer nova Jul 2, 2018, 12:17 PM

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yes

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its cooperative

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its a vr action rpg

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there is no way in hell that can be PvP

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swordfight straight up does not work in VR PvP

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by the laws of physics

thin stratus Jul 2, 2018, 12:18 PM

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Why would you host the lobbies?

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Let the Host be the Lobby. It's stable enough if coded correctly.

summer nova Jul 2, 2018, 12:19 PM

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becouse i want to do something like echo arena

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where there is a lobby where you log-in by default

thin stratus Jul 2, 2018, 12:19 PM

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But in any case, if the Host dies, Clients get send back to the MainMenu.
So you'd need to catch that and make sure to show them a "Finding new Host" screen.

summer nova Jul 2, 2018, 12:19 PM

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when you start the game you go straight into a matchmaking lobby

thin stratus Jul 2, 2018, 12:19 PM

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So where you can see other players?

summer nova Jul 2, 2018, 12:19 PM

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yes

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and interact

thin stratus Jul 2, 2018, 12:20 PM

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How much intereaction?

summer nova Jul 2, 2018, 12:20 PM

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not much more than something like echo arena or rec room

thin stratus Jul 2, 2018, 12:20 PM

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Well RecRoom the players are actually playing with each other

summer nova Jul 2, 2018, 12:20 PM

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will include a way to "post" a mission, and other players to join to it

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or just trigger matchmaking

thin stratus Jul 2, 2018, 12:20 PM

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So not like RawData, where you see other "ghosts" around you?

summer nova Jul 2, 2018, 12:20 PM

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like rec room and echo arena

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not like raw data

thin stratus Jul 2, 2018, 12:21 PM

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Never played EchoArena

summer nova Jul 2, 2018, 12:21 PM

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you have actual interaction with the other players

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can talk to them, etc

thin stratus Jul 2, 2018, 12:21 PM

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Okay

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Well yeah then you need to host it yourself

summer nova Jul 2, 2018, 12:21 PM

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i was planning around 8 to 16 players per lobby of that kind

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games are exclusively 3 people

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i dont think i can have more than 3 people without it being a hosting clusterfuck

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with the p2p

thin stratus Jul 2, 2018, 12:22 PM

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I haven't attempted to create P2P stuff in UE4

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I usually just use the Host/Client stuff from UE4

bitter oriole Jul 2, 2018, 12:30 PM

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UE4 doesn't have P2P support so

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Unless you want to rewrite the networking

summer nova Jul 2, 2018, 12:33 PM

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with p2p i mostly mean "listen server, one player hosts"

bitter oriole Jul 2, 2018, 12:41 PM

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That does work

summer nova Jul 2, 2018, 12:54 PM

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this project really is horribly complex

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i do think the multiplayer part is crucial for its success, tho

bitter oriole Jul 2, 2018, 12:58 PM

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Multiplayer always has interesting value

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(though I do think it's overrated today as a feature)

summer nova Jul 2, 2018, 1:01 PM

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in my case, coop vr games are rare

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very rare

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so i think its a huge selling point

bitter oriole Jul 2, 2018, 1:03 PM

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If it's VR, make sure MP is just a side part of the game rather than integral to it

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Well that goes for everyone

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But VR is a small enough market, you might not have a VR-enabled friend to play with

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(Or make sure VR is optional, dunno)

full bane Jul 2, 2018, 1:04 PM

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VR is a very small market, if you want to go multiplayer, probably smart to go the journey route (random pairing).
I personally don't even know anyone that owns a VR headset I could play multiplayer games with

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so co-op seems like a huge gamble

thin stratus Jul 2, 2018, 1:05 PM

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I know quite a bunch

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But most of them don't really play VR anymore

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VR was fun at the start, but the 10.000 experience killed it for me.

bitter oriole Jul 2, 2018, 1:11 PM

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Borderlands-style coop where you can play the game alone just fine is the best

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FWIW, friends of mine literally killed their game at launched by being co-op only with no matchmaking

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Outright unplayable

summer nova Jul 2, 2018, 1:13 PM

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@bitter oriole thats why i will matchmake

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thats what the lobbies are for

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even if i have only 3 players in the whole world, the 3 players will automatically meet at the lobby

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i will also have the option for a general "join me to some random mission" matchmaking

bitter oriole Jul 2, 2018, 1:14 PM

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Well, yeah. Just do understand it's not a light decision to make. Even 3 players at all times, not counting players already in a game, some months or years after launch, isn't obligatory easy

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Maybe it is on PSVR, dunno

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Just saying that player count is huge for MP games, and VR isn't the biggest market 😃

summer nova Jul 2, 2018, 1:15 PM

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of course, the game will be playable solo just fine

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thats also why i limit to 3 players max

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if i have things like maps prepared for 5-6 players, then it will be hard to find a match, and it will also have to be a HUGE map

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and when the player plays solo, it will be empty as fuck

gusty spire Jul 2, 2018, 3:23 PM

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hello i've got a multiplayer question: when making a multiplayer game , is it better to operate player variables such as HP and XP in server ? Does it help with the security of the game ?

bitter oriole Jul 2, 2018, 3:46 PM

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@gusty spire Generally speaking, everything related to a player needs to happen on both the server and the owning client

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Data that's relevant to other players need to be replicated also to other clients

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In UE4's model, there is usually an authoritative server, which is an essential part of preventing cheating, yes

gusty spire Jul 2, 2018, 3:49 PM

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i know about replicating the data and that it needs to happen on both the server and the client , what I'm asking about is the things that happen behind what it can be seen. For instance , if I have a player that shoots another player and deals him 50 damage , should the HP of the hit player be changed on the server and updated on the client or just changed on the client?

bitter oriole Jul 2, 2018, 3:54 PM

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Nothing can ever be "just on the client", because clients don't replicate to other clients

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Anything relevant to gameplay is always on the server

gusty spire Jul 2, 2018, 4:04 PM

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ok i think i found the right question , should , for instance , the variable that makes up the HP of a player be stocked in its Player controller , or should it be stocked in an array of HP variables thats in the server?

deft plaza Jul 2, 2018, 4:06 PM

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where can I find server.target.cs file for 4.19?

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This guide only has 4.18

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

Dedicated_Server_Guide_%28Windows_%26_Linux%29

steady briar Jul 2, 2018, 4:59 PM

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so i must be stupid but i cant stop something from replicating. i have an object that i want to activate a particle when the player overlaps it and then deactivate the particle when the player stops overlapping. i only want that player to see it. seems like anything i try either has everyone see it or nobody sees it. using bp... if anyone knows anything that might help it would be greatly appreciated

thin stratus Jul 2, 2018, 5:26 PM

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Well, that's not replication

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@steady briar

steady briar Jul 2, 2018, 5:26 PM

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well ya i guess im trying to make it not replicate

thin stratus Jul 2, 2018, 5:26 PM

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If an Instance of an Actor exists on one of the Players (may it be through replication spawned or placed upfront, even without the Replicate box ticked), it will call an overlap.

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It exists in front of the player, so if you run into it overlaps, makes sense?

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So since your object exists for all players (I assume so at least), you need to filter the overlap.

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Cause it happens on everyone if you don't do that.

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If you only want the code to execute for the player who overlapped it, you can do a simple test.

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In the Object that you want to overlap, you add the Begin and End Overlap event to

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Connect a branch to each exec pin of both nodes

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Get the Overlapping Actor from each and use an "EQUAL (Object)" node

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GetPlayerCharacter (or Pawn if you have pawns) and put that into the other pin of the equal node

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So basically: Test if the overlapping actor is the local Character.

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@steady briar

steady briar Jul 2, 2018, 5:32 PM

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sorry i have been scrambling everything around in my bp so im trying to recreate what you said

thin stratus Jul 2, 2018, 5:33 PM

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It's like 4 nodes for Begin and 4 nodes for End Overlap

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:P

steady briar Jul 2, 2018, 5:34 PM

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ya but i had to move all my garbage out of the way. its... not pretty T_T

thin stratus Jul 2, 2018, 5:35 PM

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📎 unknown.png

steady briar Jul 2, 2018, 5:35 PM

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it does seem to work though o__O

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i believe i read a good portion of a document of yours, people recommended it

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i guess i was too stupid to figure it out.

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📎 unknown.png

thin stratus Jul 2, 2018, 5:36 PM

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DetectionSphere is on your Player?

steady briar Jul 2, 2018, 5:37 PM

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ya this is what i ended up with, but i need to do a lot more down the line to fix things. server and player2 are still popping up a lot of strings, but the same method should work for the rest

thin stratus Jul 2, 2018, 5:37 PM

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Looks okay to me

steady briar Jul 2, 2018, 5:37 PM

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yes it is

thin stratus Jul 2, 2018, 5:37 PM

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Yeah, that def filters the other non-local player

steady briar Jul 2, 2018, 5:37 PM

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i wanted an adjustable sphere for detecting objects nearby, without having to have the player step directly on it (defeats the purpose)

thin stratus Jul 2, 2018, 5:37 PM

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Well instead of using Tag, you can also use proper Collision Types

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Create a new one in your ProjectSettings and call it "Objects" or so

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Then set the collision of the object to that type

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And make sure when creating the type that you set it to IGNORE by default

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The collision in your player then just needs to "Overlap" the type

steady briar Jul 2, 2018, 5:38 PM

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oh so just a custom collision type?

thin stratus Jul 2, 2018, 5:38 PM

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Yeah

steady briar Jul 2, 2018, 5:38 PM

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would that be more performant?

thin stratus Jul 2, 2018, 5:38 PM

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I assume so

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Don't actually know what the engine does with them

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But it's also easier for you

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Saves nodes and removes the tags

steady briar Jul 2, 2018, 5:39 PM

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well the detection sphere and harvestable objects in the world/tree chopping etc was my BP learning project. so i assume its garbage overall, not very good with it yet

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the emitter thing was my intro to replication, which i was starting to think was the wrong way to go

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but i guess this works and is cleaner o.O

thin stratus Jul 2, 2018, 5:40 PM

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Yeah it's not really replication hehe

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Replication usually is about having variables replicate and using RPCs

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But yeah, it's multiplayer though

steady briar Jul 2, 2018, 5:41 PM

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ya, there is a stage2 to this too

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its a rock/resource. when gathered it disappears. i need to do a.... RepNotify (?) so if someone walks up and it is already gathered, they shouldnt see it. but when it respawns everyone should see it again.

meager spade Jul 2, 2018, 5:42 PM

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yes

steady briar Jul 2, 2018, 5:42 PM

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i dont spawn/destroy, i just have all the pieces reset to their original location and reset the bool saying its available again

thin stratus Jul 2, 2018, 5:43 PM

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Yop that sounds fine

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Should be enough to set a boolean rep notify

steady briar Jul 2, 2018, 5:43 PM

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i dont see a node for anything called notify though

thin stratus Jul 2, 2018, 5:43 PM

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and in there disable overlaps and hide the mesh

steady briar Jul 2, 2018, 5:43 PM

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oh right right... i watched the livestream video its a bool

thin stratus Jul 2, 2018, 5:44 PM

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RepNotify is something you set on a Variable

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If you create it and check hte details panel

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It's the second option in the Replication dropdown

steady briar Jul 2, 2018, 5:44 PM

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i have the mesh fade out and set a timer until it resets its location, re-enable collision and then allow the emitter to activate on overlap again and be gathered

thin stratus Jul 2, 2018, 5:44 PM

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Selecting that will automatically create the OnRep function

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Yop

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Sounds good

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Also good you use a RepNotify and not a Multicast

steady briar Jul 2, 2018, 5:45 PM

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i have a bool called HasBeenUsed, so i would set it to RepNotify and then... id have to make a new custom event so that when it is notified to an approaching player, it defaults it to the not-available state or something right?

thin stratus Jul 2, 2018, 5:45 PM

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Na

steady briar Jul 2, 2018, 5:45 PM

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i may have said that all wrong

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i watched the livestream a while back my brain is not so good in this heat T_T

thin stratus Jul 2, 2018, 5:46 PM

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Replicated Variables send their state from Server to Client, okay?

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So if the Server sets bHasBeenUsed to true (and it was false before), the clients will receive that value at some point.

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It's not instantly of course

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Now, if you want to react to that, you can go one step further

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RepNotify still does the same in terms of replication

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But it also calls the "RepNotity_bHasBeenUsed" function, which gets automiacally created when you set a variable to RepNotify, when the value reaches the client

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That gives you a clean way of reacting to a replicated variable being changed

steady briar Jul 2, 2018, 5:48 PM

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hmm...

thin stratus Jul 2, 2018, 5:48 PM

#

In addition, since the value of the Variable will also reach new joining players as well as players who come in range of the actor, the RepNotify will also call for them

#

Compared to a Multicast, which only calls for everyone in range and then not again

steady briar Jul 2, 2018, 5:50 PM

#

right, i think the example was a treasure chest opening

thin stratus Jul 2, 2018, 5:50 PM

#

Variable Replication:

Replicated: Replicates the value of the Variabel to the Client if the Server changes it
RepNotify: Same as Replicated, but calls "OnRep_VariableName" when the value reaches the Client (also calls for the Server in BP)

#

Yeah

#

The chest is Epic example

steady briar Jul 2, 2018, 5:50 PM

#

so how do new players know that its not there anymore? the RepNotify will say its used, but that doesnt set the mesh etc

thin stratus Jul 2, 2018, 5:50 PM

#

The RepNotify is a function

#

In there you want to use the Boolean variable to hide or unhide etc.

#

So if a new player joins, the resource will replicate the boolean

#

Which calls the RepNotify on the new player

#

Which will hide the mesh etc.

steady briar Jul 2, 2018, 5:51 PM

#

so a new function that checks the bool when it is notified?

thin stratus Jul 2, 2018, 5:52 PM

#

Just so we get that right: Create a new Boolean variable (now) and set it to RepNotify.

#

So you notice that this function gets created for you.

steady briar Jul 2, 2018, 5:55 PM

#

oh ya i didnt see that

#

OnRep_HasBeenUsed yep

thin stratus Jul 2, 2018, 5:55 PM

#

Yeah, so if you now set the bHasBeenUsedvariable on the Server

#

The variable will replicate to the client

#

And the OnRep_HasBeenUsed will call automatically for you

#

You don't have to do anything for that

#

In that function you can use the variable to adjust you mesh etc.

#

Okay? (:

steady briar Jul 2, 2018, 5:57 PM

#

yes i believe so. thanks, this has been possible the best 45 minutes of learning in the last few months 😃

dull stream Jul 2, 2018, 5:57 PM

#

so Im still a bit unsure when its best to use an RPC vs replicated variable. Ive been using mostly RPCs but that might not be correct

#

when would you say its best to use an RPC vs a replicated variable?

thin stratus Jul 2, 2018, 5:58 PM

#

If you only need the value to be replicated and then to be used in multiple different cases, you just replicate it

#

Like a TeamNumber

#

Or the health of a player

#

If you need something to happen when the value changes, you use RepNotify

#

And if you just need to send some random data, which isn't important for late joiners etc. you use an RPC

dull stream Jul 2, 2018, 5:59 PM

#

hm I see. I definitely need to go back and changes some of my code then

thin stratus Jul 2, 2018, 6:03 PM

#

- Replicated Variable: Value needs to reach the Client. Not important what happens afterwards with it and doesn't need anyone to react to the change. (E.g. Health of a Player).
- RepNotify Variable: Similar to Replicated Variable, but used if player should directly react to the Variable being changed. Also used when Late Joiners and Players who come into Relevance (via range for example) need to know about the variable too. (E.g. If a Door is open or closed. bDoorOpen and then changing the door based on that in the RepNotify function).
- Multicast (And other RPCs): Used kinda like a Fire and Forget Method (Can use Reliable to make sure it reaches the target) to send Data or to make target do something. (E.g. Spawn a Gun Sound. Late joiners don't care that a gun sound has been played before they joined)

#

@dull stream

#

Maybe that helps a bit more

#

One could now say "But if my Player has <= 0.0 health, I want to spawn a particle on him, so OnRep would make sure that happens!" Or what ever other thing.
If that's the case, you either use a Multicast (cause who cares about a particle effect when joining late) or use an additional variable "bIsDead" as OnRep to adjust meshes (ragdoll?)

#

However wouldn't use bIsDead to spawn a particle, cause still no one cares about that.

#

If I come in 5 minutes late and see the player dead, I don't need to see the particle suddenly firing

steady briar Jul 2, 2018, 6:31 PM

#

@thin stratus should i be using any Replication Condition? im having a few issues with it. the emitter works for the correct person, but its not turning off when the object is used/disabled. tried to have it re-check the bool and set the emitter accordingly, but doesnt seem to work

thin stratus Jul 2, 2018, 6:42 PM

#

Replication conditions are a bit tricky

#

Don't think you need them here though

#

If your emitter doesn't turn off, are you sure it's the replication or just the code and it doesn't turn off cause of that?

#

Print something or add a breakpoint (select node and press F9)

steady briar Jul 2, 2018, 6:43 PM

#

ya ive been printing, not sure what the issue is. it used to work (but for all, so was still broken)

#

like i have the emitter check if it has been used. if its has been used, deactivate. but it doesnt seem to be working. i only have 2 spots where i set the Used bool and it should be pretty clean between em... not sure

deft plaza Jul 2, 2018, 6:45 PM

#

what are the best options for server hosting, just for development testing?

thin stratus Jul 2, 2018, 6:46 PM

#

Öhm, your own PC?

#

Idk what you need

deft plaza Jul 2, 2018, 6:47 PM

#

something for multiple computers on different connections to be ablt ot join on

thin stratus Jul 2, 2018, 6:47 PM

#

Well, guess most people host on Amazons Linux Servers

deft plaza Jul 2, 2018, 6:47 PM

#

Amazon gamelift or just regular server?

thin stratus Jul 2, 2018, 6:47 PM

#

GameLift is a bit too much, just for deving

#

Takes ages to upload new builds

#

So regular, yeah

dull stream Jul 2, 2018, 7:31 PM

#

@thin stratus thanks, that does help 😃

#

hm, so for health though, shouldnt rep notify be used to update things like UI?

thin stratus Jul 2, 2018, 7:35 PM

#

Ah well yeah, you could do that

#

Haven't encountered any performance issues with polling it

#

So stopped caring

dull stream Jul 2, 2018, 7:35 PM

#

ah I see

thin stratus Jul 2, 2018, 7:36 PM

#

(Widget wise)

#

But yeah, you can use RepNotify for UI updates

dull stream Jul 2, 2018, 7:37 PM

#

I see, okay.

scarlet moat Jul 2, 2018, 7:47 PM

#

help! i'm really struggling getting many aspects of split screen working, theres obviously things i'm struggling to understand. Does anybody know if there ae any good examples out there of projects that i could take a look at. One thing i'm trying to do is create a spheretrace by channel but i cant seem to find a way to get it to start from any other screen apart from player 1's. Any help would be greatly appreciated.

📎 unknown.png

thin stratus Jul 2, 2018, 8:04 PM

#

Splitscreen uses the Index on the "GetPlayerCharacter"

#

So if you put in 1 instead of 0, you'll get the second player

#

If your weapon is spawned through your character, it might be better to pass it a reference to the character

#

And using that

#

Instead of GetPlayerCharacter

#

@scarlet moat

scarlet moat Jul 2, 2018, 8:44 PM

#

@thin stratus OK thankyou, ill take a look tomorrow and let u know how it goes

dull stream Jul 2, 2018, 9:28 PM

#

I could have sworn there was something for setting a default player name

#

does anyone know where that is

#

I swear I set it to David Wong earlier but now I cant find it and the player names are blank

#

😐

dull stream Jul 2, 2018, 9:56 PM

#

its in gamemode. no idea why its not being set in my player state anymore. oh well.

thin stratus Jul 2, 2018, 10:07 PM

#

@dull stream Make sure to use the actual GetPlayerName function

#

They seem to have changed that in 4.19 or so

#

If you use the plain variable it will just be empty

#

I had that cause I updated my lobby system and suddenly had no names anymore

dull stream Jul 2, 2018, 10:27 PM

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I'll give that a shot. Thanks.

strong breach Jul 3, 2018, 12:29 AM

#

I got steam multiplayer working for my game but if I want to get my game working on mobile can I just use the unreal online subsystem or do I have to use some other service?

steady briar Jul 3, 2018, 12:54 AM

#

if im simulating a dedicated server, why does 1 window have the server AND client1 print, but the other window is just client2. isnt that a listen server type thing?

dense badge Jul 3, 2018, 2:47 AM

#

(Repost from #blueprint as this might be more appropriate place to ask this question) I'm trying to switch from calling animation montage directly from Task blueprint into using the animgraph's sequencer. The question is what is the standard path to establish communication between ABP and BTT? I think my only option is to use the BTT to update the controller BP value, then on update in the ABP, grab the new value and use that for the animgraph, however it seems over complicated to me?

My goal is to make sure my AI animation can be replicated. From my research, BB are local memcache and is not propagate and only stay within client. The only source of data that is true is the server's running controller BP. Is this assumption correct?
Would love to see if there is any tutorial out there talking about the standard way in UE4 of doing AI animation. I have seen people calling the montage directly in BTT, which makes the purpose of the ABP seems useless beside the locomotion. There's also people using the AIC to propagate BB data into the controller BP, which seems backward to me?

I kinda understand that, when the BB call a BTT and update the BB, the BP then need to query the AIC to grab the updated BB value when needed. However if the controller BP is the source of truth, shouldn't the flow be, that a BTT calls the BP to update data, and the BP tell the AIC to mirror that data into the BB if needed. This ensure that BP has the value before BB, which allows the AI to be replicate successfully in server and client.
Thanks in advance 😃

#

The assumption I'm making above is related to this post: https://answers.unrealengine.com/questions/221987/how-to-activate-animation-state-from-a-task-in-beh.html

fossil spoke Jul 3, 2018, 2:54 AM

#

@dense badge Please dont post the same message in multiple channels. Please read the #old-rules

dense badge Jul 3, 2018, 2:58 AM

#

Totally forgot to delete the other one. Sorry about that @fossil spoke .

hazy herald Jul 3, 2018, 3:19 AM

#

Advanced sessions works in editor but wont work in packaged build

#

i nned help

steady briar Jul 3, 2018, 5:31 AM

#

so in multiplayer/dedicated server... is player 0 always self? so like everyones non-replicated stuff is for player 0

agile lotus Jul 3, 2018, 5:42 AM

#

I'm having an issue with a timeline not stopping properly on listen servers pawn in clients world

#

what would likely cause that

thin stratus Jul 3, 2018, 6:32 AM

#

@strong breach Yeah. Your phone doesnt use Steam :P

#

@steady briar 0 is always the first local player

steady briar Jul 3, 2018, 6:33 AM

#

ok ty

thin stratus Jul 3, 2018, 6:33 AM

#

Since you can also have splitscreen online, the other indices arent limited to local mp

#

But i general, 0,depending on who calls GetPlayerController, is the local one

steady briar Jul 3, 2018, 6:34 AM

#

my current issue is the overlap start/end spamming, which may be related to dedicated server but i dunno. different issue =/

#

ya it sounds like 0 should always work for what i need

thin stratus Jul 3, 2018, 6:35 AM

#

Yes

#

It could be that more than one collision overlaps

#

Make sure only one does

#

The other way would be a combination of DoOnce and Sequence

strong breach Jul 3, 2018, 6:36 AM

#

@thin stratus lmao fair enough. is it as simple as changing the default sub system from steam to google play/ios (just need matchmaking really)

thin stratus Jul 3, 2018, 6:37 AM

#

Just be aware that you can play against steam users

#

Crossplay needs your own subsystem

strong breach Jul 3, 2018, 6:37 AM

#

yeah i expect them to be seperate

thin stratus Jul 3, 2018, 6:37 AM

#

Also not all subsystems expose a session interface

steady briar Jul 3, 2018, 6:38 AM

#

my overlap is just 1 sphere overlapping another sphere, checks for tags and its the only thing with the tag too so i dunno

thin stratus Jul 3, 2018, 6:38 AM

#

So could be that one of them cant do online sessions @strong breach

strong breach Jul 3, 2018, 6:38 AM

#

@thin stratus damn. alright ill check the google play docs then

thin stratus Jul 3, 2018, 6:38 AM

#

@steady briar Hm then try to limit it via Sequence and DoOnce

steady briar Jul 3, 2018, 6:39 AM

#

well the player should be able to enter and leave the volume repeatedly

thin stratus Jul 3, 2018, 6:39 AM

#

@strong breach Yeah, could be that they have session support but dont have it exposed to the subsystem. So if you find info, double check the subsystem plugin

#

Otherwise you need to manually include their sdk

strong breach Jul 3, 2018, 6:41 AM

#

docs say "Specifically, this is the system that allows you to write a project that can access the online features of Steam, Game Center, Google Play, etc. without having to write specific code for each of those platforms."

#

so other than changing the defaultengine file to whatever service im using i think i should be fine

#

gonna test it now to be sure though. thanks

agile lotus Jul 3, 2018, 6:46 AM

#

Everything after Finished on the timeline is delayed on listen server's pawn but only on clients screen/world. When the server pawn finishes timeline it appears to jump/correct its position on client screen

📎 unknown.png

thin stratus Jul 3, 2018, 6:47 AM

#

@strong breach As said, not all subsystem actually implement all Interfaces

#

It is true that, in case ios and android support the same stuff as steam AND implemented it, that you can simply use the same code

#

I just want to make you aware that you COULD get problems and if you do, you have an idea where they could come from

#

@agile lotus Why a timeline that doesnt use Update?

#

If you just want to delay stuff, then use a delay node or a proper timer

agile lotus Jul 3, 2018, 6:50 AM

#

was trying to use a timer originally but had the same problem

thin stratus Jul 3, 2018, 6:51 AM

#

Then your code has an issue i guess. Lets see

#

Could be that you need to set velocity and the movement Mode via RepNotify

#

So everyone Updates it

agile lotus Jul 3, 2018, 6:52 AM

#

I'll try that out

#

this is how I call it

📎 unknown.png

#

right now anyway

thin stratus Jul 3, 2018, 7:01 AM

#

Hm

#

Well you are trying to multicast on remote

#

Isnt that supposed to ve a server rpc? And if yes, youd need to limit it to the owning Client. Others cant call server rpcs

#

@agile lotus

agile lotus Jul 3, 2018, 7:05 AM

#

It only seems to work when it's a multicast

#

on remote

#

besides the bug on finished

twin juniper Jul 3, 2018, 7:06 AM

#

you can only call multicast from server.

agile lotus Jul 3, 2018, 7:07 AM

#

so having it there under remote is doing nothing with it?

twin juniper Jul 3, 2018, 7:08 AM

#

📎 unknown.png

#

📎 unknown.png

#

that's code i use to fire my laser in multi. works.

#

have remote -> client freezeframes -> custom SERVER RPC that points to the multicast one

#

try that

thin stratus Jul 3, 2018, 7:13 AM

#

Well it might call it locally

#

But def won't multicast#

#

https://i.imgur.com/QqZL1YM.png

Imgur

#

So yeah, a multicast simply runs it on the invoking client

#

So like a normal event/function

agile lotus Jul 3, 2018, 7:16 AM

#

📎 unknown.png

#

I did it this way

#

still get the same problem

twin juniper Jul 3, 2018, 7:18 AM

#

does the remote server exec eventually point bak to the multicast?

#

like this

📎 unknown.png

agile lotus Jul 3, 2018, 7:18 AM

#

Yeah

📎 unknown.png

thin stratus Jul 3, 2018, 7:18 AM

#

Can you show the whole FreezeFrames function?

#

I assume there is something simply wrong

#

Also what is calling FreeFrames1

twin juniper Jul 3, 2018, 7:19 AM

#

yeah. you may need to f9 and debug the exec flow . for suspicious nodes.

agile lotus Jul 3, 2018, 7:19 AM

#

FreezeFrames1 is called on a collision event that is server auth only

thin stratus Jul 3, 2018, 7:20 AM

#

If it's ServerAuth only, why needing the additional SwitchhasAuthority

#

Then it will never call the Client version anyway

#

So the error is probably in your mutlicast after all

agile lotus Jul 3, 2018, 7:22 AM

#

is an event already replicated if called from a server event

#

📎 unknown.png

#

Inside CollisionEvent is where freezeframes1 is called

thin stratus Jul 3, 2018, 7:23 AM

#

Ehm nooo

#

Remove the Server RPC

#

And move the Switch and the CollisionEvent down

#

There is no need to ServerRPC

agile lotus Jul 3, 2018, 7:24 AM

#

Gotcha so this is okay

📎 unknown.png

thin stratus Jul 3, 2018, 7:24 AM

#

yeah

#

The Actor exists on everyone

#

So beginOverlap is also called on everyone

#

So just limiting it to the Authority is enough

agile lotus Jul 3, 2018, 7:25 AM

#

Okay that makes sense

#

so because it's a server authority ->multicast collision event

#

I can't multicast the freezeframes from within the collision event

#

correct?

thin stratus Jul 3, 2018, 7:26 AM

#

Well your Collision Event is already Multicasting

#

Multicasting in that again would be bad

#

Cause everyone calls that

#

Resulting in the Server calling the Multicast again

#

And each client calling it locally

#

So overall you would have 1 call for the server and 2 for each client

agile lotus Jul 3, 2018, 7:28 AM

#

But I do have to RPC the freezeframes event when calling it within that multicast?

#

freezeframes needs to be called on both the attacking pawn and the pawn being hit, so it needs to call on both client and server side pawns

thin stratus Jul 3, 2018, 7:30 AM

#

Ehm

#

What you should do then is:

BeginOverlap -> SwitchHasAuthroity -> CollisionEvent (No RPC at all).
Then in there, calling the same function on the Pawn that overlapped and the one that was overlapped.
And that function should be a Multicast

umbral adder Jul 3, 2018, 7:34 AM

#

https://forums.unrealengine.com/development-discussion/c-gameplay-programming/1496527-request-party-system-tutorial-with-party-beacons

Unreal Engine Forums

Things i would like:

Lobby Beacon vs Party Beacon
Party System Tutorial Creation, and explanation of these classes

Thanks -Decode

agile lotus Jul 3, 2018, 7:38 AM

#

Alrighty I've done all that now but I still get the same problem

#

wait so when you say "BeginOverlap -> SwitchHasAuthroity -> CollisionEvent (No RPC at all)." do you mean CollisionEvent should not be multicasted

#

so instead of having that extra event just have BeginOverlap -> SwitchHasAuthroity -> the logic for collisions

thin stratus Jul 3, 2018, 7:41 AM

#

Yeah the CollisionEvent should not be a multicast

#

Cause you said that you want to call the event on each pawn

#

Ah actually

#

Gimme a sec, what is actually colliding?

#

Two pawns with each other or two pawns with something?

agile lotus Jul 3, 2018, 7:42 AM

#

its a hitbox actor that is owned by the pawn

#

pawn creates hitbox actor

thin stratus Jul 3, 2018, 7:42 AM

#

So this calls inside of a Pawn?

agile lotus Jul 3, 2018, 7:42 AM

#

yeah

thin stratus Jul 3, 2018, 7:42 AM

#

Ah, sorry.

#

Then the overlap calls for both, right?

agile lotus Jul 3, 2018, 7:43 AM

#

only one pawn

#

but I check the owner of the hitbox

#

and call freezeframes from that on the hitbox owner

thin stratus Jul 3, 2018, 7:43 AM

#

So the HitBox on PawnA overlaps with PawnB

#

And only the HitBox calls the Overlap?

agile lotus Jul 3, 2018, 7:43 AM

#

PawnB calls the overlap

thin stratus Jul 3, 2018, 7:43 AM

#

Or htat, so HitBox overlaps and PawnB calls the overlap

agile lotus Jul 3, 2018, 7:44 AM

#

correct

thin stratus Jul 3, 2018, 7:44 AM

#

Okay, then yeah, don't make it a Multicast#

#

You want to make the event that is called on the pawn a multicast

agile lotus Jul 3, 2018, 7:44 AM

#

the freeze frames event

#

right?

thin stratus Jul 3, 2018, 7:45 AM

#

Cause CollisionEvent only calls once on PawnB. From there you want to call FreezeFrame on PawnB and PawnA, right?

agile lotus Jul 3, 2018, 7:45 AM

#

exactly

thin stratus Jul 3, 2018, 7:45 AM

#

Yeah then FreezeFrame should be the multicast

#

And CollisionEvent not

agile lotus Jul 3, 2018, 7:45 AM

#

is it okay to have Collision event as its own event like that? without any replication

thin stratus Jul 3, 2018, 7:46 AM

#

Sure, why not

agile lotus Jul 3, 2018, 7:46 AM

#

just wanted to make sure

thin stratus Jul 3, 2018, 7:46 AM

#

Can you show what happens in there?

agile lotus Jul 3, 2018, 7:46 AM

#

I can but it's not pretty

#

It's alot of math

thin stratus Jul 3, 2018, 7:46 AM

#

Hm

#

Well It's hard to help without seeing code

agile lotus Jul 3, 2018, 7:47 AM

#

I know I can definitley show you just a fair warning 😛

thin stratus Jul 3, 2018, 7:47 AM

#

Well, I assume the math is correct?

#

And from there you call the Multicast FreezeFrames on each pawn?

#

If that's all, then it's fine

agile lotus Jul 3, 2018, 7:48 AM

#

yes

#

I'll test now that collision isnt multicast

#

looks like it works!

#

😄

#

Can I ask you, should I be spawning hitboxes only on server auth?

#

to prevent any discrepancies between client and server screens

#

answered that question myself by trying it

#

the answer is yes

thin stratus Jul 3, 2018, 8:04 AM

#

If you spawn the HitBox only on the Server, you can be sure that it also only overlaps on the Server

#

so yeah

boreal vine Jul 3, 2018, 1:14 PM

#

Hi, im having a problem. In the standard fps template the gun is not replicating movement on the client

#

i can see the gun move up and down on server but not the client

shy idol Jul 3, 2018, 2:12 PM

#

If I have a function that will only ever be called from within a Server function, is there any need to set that as a server function itself?

scarlet moat Jul 3, 2018, 2:13 PM

#

@thin stratus Sorry i'm still only learning and passing information to and from different blueprints is something i still haven't got my head around. I understand that i can change the index to change which screen the trace is drawn from but i'm not sure how i'd pass the weapon blueprint a reference to the character?

thin stratus Jul 3, 2018, 2:15 PM

#

Does your Character spawn the Weapon?

#

@scarlet moat

scarlet moat Jul 3, 2018, 2:15 PM

#

yes

thin stratus Jul 3, 2018, 2:16 PM

#

Then create a Variable in your Weapon called "PawnOwner" or something like that

#

The type should be the one of your Character

#

Ping me once that is done

scarlet moat Jul 3, 2018, 2:20 PM

#

@thin stratus done.

thin stratus Jul 3, 2018, 2:21 PM

#

Alright, now you have two ways of setting this.

#

On your "SpawnActor" Node, that spawns you Weapon (In your Character) you drag off the ReturnValue (that's the ref to your weapon) and call "Set PawnOwner"

#

The value you want to set this to is "Self", which refers to the very instance of your Character who calls that.

#

So if you have two characters (or more) self always refers to the one who actually calls self. Just like you saying "self" an instance of hte class "Human", refering to you, while I saying "self" refers to me.

#

Hope that makes sense

#

The second method is a bit cleaner and allows the variable to be valid in your weapon a bit earlier:

Select your new variable and check the details panel of it. In there, select "Instance Editable" and "Exposed on Spawn".

#

Now, your SpawnActor node should actually show that very variable

#

If not, try to rightclick the spawn actor node and hit "RefreshNodes"

#

Here you can again set the variable to "self"

#

Let me know once you implemented one of the two ways and show me what you did @scarlet moat

scarlet moat Jul 3, 2018, 2:39 PM

#

@thin stratus thanks again really appreciate this i've been stuck for days. this is what i have, its not correct tho, i dont think

📎 unknown.png

#

📎 unknown.png

#

wait, just realised i made a mistake . lol

📎 unknown.png

#

still doesnt work. haha. i really am still new at this

next falcon Jul 3, 2018, 2:46 PM

#

is it possible to stream a level for all players at the same time?
Like if i load a level instance everybody can see it ?

thin stratus Jul 3, 2018, 2:52 PM

#

@scarlet moat Reread what I wrote

#

The second image was correct in terms of the connection of the Target pin

#

But you need to use "Self" for the actual PawnOwner

scarlet moat Jul 3, 2018, 3:01 PM

#

@thin stratus Wow! Thank you so much it works, your a legend.😘

📎 unknown.png

thin stratus Jul 3, 2018, 3:03 PM

#

@scarlet moat No biggie

#

You did both ways at once though

#

As you might see, your SpawnActor node on the left has a PawnOwner pin

#

You can directly connect the Self to that

#

Then you don't need to do it after spawning

scarlet moat Jul 3, 2018, 3:11 PM

#

@thin stratus thats sounds like me alright, i have never been very good at following instructions 😂

twin juniper Jul 3, 2018, 3:18 PM

#

Hello, I am new here. Is there a way to do some sort of netcode analysis on your net code? Also, when would it be a good idea to use Sockets instead of RPCs?

thin stratus Jul 3, 2018, 4:06 PM

#

Well you can capture your net stuff and then view it later

#

Cant come up with the keywords right now but a Quick google will help you

mild geyser Jul 3, 2018, 4:20 PM

#

If I wanna generate levels procedurally in multiplayer game, how should I do it? Spawn the rooms and replicate their position to all the clients and the client clone the layout based on the coordinates?

deep island Jul 3, 2018, 4:24 PM

#

hi, is there any way to reset the PlayerControllers on seamless travel?

#

I tried using Reset() on HandleSeamlessTravelPlayer event, but it's not working

worthy wasp Jul 3, 2018, 4:32 PM

#

@deep island - by reset - you mean ReInitialize? Because i thought even with seamless travel - all classes EXCEPT GameInstance re-initialize..... all their variables should go back to defaults?

#

GameInstance class is the only class that handles a load-state persistance (IE: MapChange/ServerTravel)

deep island Jul 3, 2018, 4:44 PM

#

@worthy wasp yes, I need all variables to set to default values

#

I'm trying now to edit HandleSeamlessTravelPlayer inside my GameMode

#

removing SwapPlayerControllers function should do what I want

thin stratus Jul 3, 2018, 4:59 PM

#

@mild geyser well youd only need to spawn the replicated actors on the Server

#

All the rest can be handled via an easy seed of a stream

#

If all your generation uses the same stream and seed, you can tell the client the seed and thats it

#

For your random stuff it is

#

Youd skip spawning replicated actors on the client of course

mild geyser Jul 3, 2018, 5:01 PM

#

Let's say I have a listen server so it's enough to spawn the actors on host player and the rest is handled by UE?

thin stratus Jul 3, 2018, 5:02 PM

#

@deep island @worthy wasp Afaik they reset by default. Youd need OnSwapPlayerControllers to actually keep data or?

#

@mild geyser You select a seed on the server

#

And tell that to your clients

#

Then ALL run the Generation script with the same seed

#

However the spawning of replicated actors, such as doors, should only happen on the server

#

As that results in them spawning on the client anyway

#

Everything non replicated, such as walls, can be created through the Generation algorithm with proper seed.

mild geyser Jul 3, 2018, 5:06 PM

#

Thx, I think I got the idea

#

Can I basically do the seed selection / replicated actor spawning anywhere as long as I just check that the role is ROLE_Authority?

#

Or what's the proper approach to do the serverside stuff

hasty adder Jul 3, 2018, 5:27 PM

#

Quicky here. If I have a modular character and I have the server spawn it with its “parts” exposed at spawn how much more would one need to ensure it’s replicated right both currently on server and new comers

timid pendant Jul 3, 2018, 5:32 PM

#

Hi are the beacon drivers only limited to steam? Would i need to enable steam to have them working

worthy wasp Jul 3, 2018, 6:08 PM

#

@timid pendant - i was on a nintendo switch project not long ago... the BeaconDrivers are global to the OnlineSubsystem.... not a particular SDK..... Steam implements the OSS Beacon utility.

FWIW - i had to purchase the SteamParty plugin to study from for the OSS's Beacon utility & useability.... it was a pain in the ass but we pulled it off.

timid pendant Jul 3, 2018, 6:08 PM

#

Thanks I will try to find if the NULL implements it also or try to make a netdriver definition

worthy wasp Jul 3, 2018, 6:10 PM

#

you simply need to include the appropriate headers & utilize their funcitonalities..... again - it was a pain in the ass .... because go figure: UE4 doesnt have updated documentation/wiki or API docs for certain things like the beacon system or HTNPlanner (my latest AI Endeavors)

#

#WhodaThunkToUpdateDocs?

timid pendant Jul 3, 2018, 6:10 PM

#

Yeah I see many complaining of the lack in documentation on beacons and the whole subsystem thing

worthy wasp Jul 3, 2018, 6:11 PM

#

cuz were only 4 years in teh making.... right?

#

at least we have it 10x better than Cryengine.....

deep island Jul 3, 2018, 6:14 PM

#

there's one thing I don't understand

#

in the engine code, where does the new PlayerController copy properties of the old with Seamless Travel?

worthy wasp Jul 3, 2018, 6:15 PM

#

uh.... properties like deafult properties of the class - connection type ones

#

not custom stuff you put into it.

#

so if you were to change ANY of the NATIVE variables to the class - those would OF COURSE copy over

#

anything you put in custom added to the class - will be defaulted

#

so any changes you have to them at runtime - get re-inited

#

again - UGameInstance is the ONLY class tha tdoesnt reinitialize with a LoadState event

winged badger Jul 3, 2018, 6:16 PM

#

OnSwapPlayerControllers iirc

#

you get a reference to both the old and the new one

deep island Jul 3, 2018, 6:17 PM

#

yeah, I've already seen that

#

the problem is that I can't find where the variables are copied

#

I found this: NewPC->SetPlayer(Player);

#

or CopyRemoteRole

#

but CopyRemoteRole doesn't copy variables

winged badger Jul 3, 2018, 6:18 PM

#

you get say, OldPlayerController->SelectedIndex and store it in NewPlayerController->CharacterIndex

#

or whatever you need

#

it won't do it for you

worthy wasp Jul 3, 2018, 6:20 PM

#

this would be editing engine source for something as simple as copying it to the gameinstance class (a struct will work) and then copying it back to the new controller on Controller::BeginPlay()

winged badger Jul 3, 2018, 6:20 PM

#

no editing required

worthy wasp Jul 3, 2018, 6:20 PM

#

those events arent exposed to BP?

winged badger Jul 3, 2018, 6:20 PM

#

you have reference to both old and new PCs, both valid

#

i think OnSwap is

worthy wasp Jul 3, 2018, 6:21 PM

#

at work so i dont have the editor open on my end... one sec while i check API docs

winged badger Jul 3, 2018, 6:21 PM

#

not at work so i don't have editor open 😄

worthy wasp Jul 3, 2018, 6:22 PM

#

APlayerController::PendingSwapConnection() is hte ONLY swap method i see in both that class & AController

#

hard to tell from APIDocs if its exposed to BP's or not....

winged badger Jul 3, 2018, 6:23 PM

#

AGameModeBase::K2_OnSwapPlayerControllers

#

that one is

#

all K2 are BP nodes

worthy wasp Jul 3, 2018, 6:24 PM

#

again i was checking APIDocs - dont have my dev PC with me 😛

winged badger Jul 3, 2018, 6:24 PM

#

same^^

worthy wasp Jul 3, 2018, 6:24 PM

#

so this is a function that is delegate binded i'll assume on the event ServerTravel

winged badger Jul 3, 2018, 6:24 PM

#

its just the consistent naming, anything starting with K2 is blueprint exposed

#

always

worthy wasp Jul 3, 2018, 6:24 PM

#

that doesnt do anything automatically - you'd still have to swap information.

#

understood

#

i knew that in the BACK of my mind lol

#

but you're still tasked with exchanging the information

winged badger Jul 3, 2018, 6:25 PM

#

ofc

#

unreal won't be able to read your mind at least until 4.42

worthy wasp Jul 3, 2018, 6:25 PM

#

thats some advanced AI

#

❤

twin juniper Jul 3, 2018, 6:34 PM

#

Hello, has anyone here used Sockets? What were they used for?

steady briar Jul 3, 2018, 6:37 PM

#

sockets like... the thing u can add to a bone or something?

thin stratus Jul 3, 2018, 6:37 PM

#

I would say Sockets that you connect to

#

I'm pretty sure you can simply find everything out about them on the net

#

UE4 isn't reinventing them

steady briar Jul 3, 2018, 6:38 PM

#

i wasnt sure if socket was some networking term or if it was the thing u can snap weapons to etc

thin stratus Jul 3, 2018, 6:38 PM

#

It's both, if that makes sense to you

#

And if people ask in Multiplayer I would go for network

#

But well

steady briar Jul 3, 2018, 6:39 PM

#

most things dont, but i am having some issues with my repnotify again

#

does a variable with repnotify work for people who are within range when it changes? or is it purely for people who show up later

distant wave Jul 3, 2018, 6:50 PM

#

Hello, there!
If I look for my dedicated server I get these warnings (in client log):

[2018.07.03-18.45.17:926][229]LogNetVersion: StandYourGround 1.0.0.0, NetCL: 0, EngineNetVer: 2, GameNetVer: 0 (Checksum: 2374043608)
[2018.07.03-18.45.18:087][239]LogOnline: Warning: STEAM: Rules response NUMOPENPRIVCONN 0
[2018.07.03-18.45.18:088][239]LogOnline: Warning: STEAM: Rules response NUMOPENPUBCONN 100
[2018.07.03-18.45.18:088][239]LogOnline: Warning: STEAM: Rules response OWNINGID 90115716982511623
[2018.07.03-18.45.18:088][239]LogOnline: Warning: STEAM: Rules response OWNINGNAME SYG
[2018.07.03-18.45.18:088][239]LogOnline: Warning: STEAM: Rules response P2PADDR 90115716982511623
[2018.07.03-18.45.18:088][239]LogOnline: Warning: STEAM: Rules response P2PPORT 7777
[2018.07.03-18.45.18:089][239]LogOnline: Warning: STEAM: Rules response SESSIONFLAGS 683
[2018.07.03-18.45.18:089][239]LogOnline: Warning: STEAM: Rules response SYGServerName_s EU StandYourGround Game
[2018.07.03-18.45.18:089][239]LogOnline: Warning: STEAM: Rules refresh complete
[2018.07.03-18.45.18:089][239]LogOnline: Warning: Unknown or unsupported data type from Steam key data NUMOPENPRIVCONN 0
[2018.07.03-18.45.18:089][239]LogOnline: Warning: STEAM: Failed to parse setting from key NUMOPENPRIVCONN value 0
[2018.07.03-18.45.18:089][239]LogOnline: Warning: Unknown or unsupported data type from Steam key data NUMOPENPUBCONN 100
[2018.07.03-18.45.18:089][239]LogOnline: Warning: STEAM: Failed to parse setting from key NUMOPENPUBCONN value 100```

And my server cannot be found. Any solution would be appreciated.

#

also I am using my own Steam AppID

twin juniper Jul 3, 2018, 7:03 PM

#

I understand what sockets are. However, I'm trying to understand when to use this feature instead of passing data via RPCs

#

Are there any specific use cases for when to use Sockets vs. RPCs?

fleet sluice Jul 3, 2018, 7:15 PM

#

@twin juniper The most common use case for sockets is for whatever traffic needs to happen regardless of level transitions and/or connections (i.e. voice chat, parties, DLC downloads before actually joining servers, querying servers for particular information before actually joining etc.). Once the connection is established, there is no real benefit of using sockets over replication (RPCs/replications have some overhead, but it's in no way noticeable).

twin juniper Jul 3, 2018, 7:23 PM

#

Thank you, much appreciated

agile lotus Jul 3, 2018, 10:43 PM

#

Is there anyway to reduce server position corrections on listen servers?

#

Or do I just need to get dedicated servers up and running for best performance

deft plaza Jul 3, 2018, 11:07 PM

#

Does creating a session automatically join the creator of that session to the session?

deft plaza Jul 3, 2018, 11:35 PM

#

Has anyone received this error before?

#

LogScriptCore: Warning: Script Msg: CreateSession - Invalid or uninitialized OnlineSubsystem
LogScriptCore: Warning: Script Msg: CreateSession - Cannot map local player to unique net ID

dull stream Jul 4, 2018, 3:20 AM

#

so, if I have an actor thats client side only... and i want the server to modify or call a function on that client side actor... the only way to do that is to communicate with an intermediate actor that exists on both the server and client?

#

for example, say you had some manager class that is replicated on server and client. it keeps track of both versions of the non-replicated actor. something like that would be the solution?

#

you cant just like, pass a pointer to the actor to the server from the client, because the server wouldnt have the actor correct?

#

also if i wasnt clear, Im not replicating this actor which is why I have two of them (one on client and one on server).

#

I have no intention on replicating it

winged badger Jul 4, 2018, 3:48 AM

#

if its stably named, you can reference it over network even if its not replicated

#

that would mean its loaded from a package (pre-placed in level) and not spawned at runtime

#

in that case its name is unique and same on both client and server, allowing it to be referenced by it

dull stream Jul 4, 2018, 3:51 AM

#

whaaat really

#

oh wait no im spawning it dynamically so it wouldnt work

#

still, thats good to know

winged badger Jul 4, 2018, 3:52 AM

#

but imo - server having to modify the non-replicated actor on a client is working around the engine

dull stream Jul 4, 2018, 3:52 AM

#

well the thing is, Im doing projectiles

#

when the client clicks, it needs to spawn immediately, i dont want to wait to hear back from the server

#

so i need the client to have a local simulated version of the projectile before the server spawns its own version

#

this is how Unreal Tournament does it from what I have read, and then they somehow sync it up to match. Im less worried about syncing it up right now, I mostly just want to make sure the explosion effect only plays on clients if the servers version hit the target

#

client version wouldnt worry about hitting characters really

winged badger Jul 4, 2018, 3:54 AM

#

so - spawn your projectiles like you're doing now

#

spawn a replicated explosion actor on server if it hits

#

its a minimal package really - just the Actor's type and location

dull stream Jul 4, 2018, 3:55 AM

#

hm, didnt think about that. I have the projectile contain the particle component

#

currently

winged badger Jul 4, 2018, 3:55 AM

#

it spawns a particle effect on BeginPlay, and destroys itself when its done

dull stream Jul 4, 2018, 3:56 AM

#

yeah hm, need to consider my options there. I could do it that way you're right.

#

though I do think i will try to sync up the server and client actor positions at some point, so I might should have an actor that manages the two of them anyway

#

I dunno. im not sure how important it is to make sure the client simulation is accurate.... during my play testing it was kinda odd because there were points the projectile clearly wasnt hitting me but i took damage

#

it was close to hitting me, but not exactly

#

that may just be impossible to realy fix though 🤔

#

always gonna be latency

#

or vice versa, where it looks like im hitting him a bunch of time, but im not

winged badger Jul 4, 2018, 4:00 AM

#

the explosion actor approach might not make it perfect, but it should make it clear if there was a hit or not

#

also, decals

dull stream Jul 4, 2018, 4:00 AM

#

yeah, i should probably do that way and see if it helps

winged badger Jul 4, 2018, 4:00 AM

#

on the target that was hit

dull stream Jul 4, 2018, 4:01 AM

#

but theres also the fact that i need the projectile client side to be destroyed when that replicated explosion from server triggers. so i would still need to communicate with the client side projectile

winged badger Jul 4, 2018, 4:01 AM

#

accidentally disconnected mine the other day and i didn't even feel like i was hitting anymore, even if i obviously was

dull stream Jul 4, 2018, 4:02 AM

#

because what if the client misses, but on server it actually landed a hit. the client wouldnt know and the projectile would shoot off right through

#

despite the explosion playing

winged badger Jul 4, 2018, 4:02 AM

#

let the collision handle it imo

#

it will be accurate enough

dull stream Jul 4, 2018, 4:03 AM

#

hm you think? maybe thats true

winged badger Jul 4, 2018, 4:03 AM

#

especially if we're talking firearms here

dull stream Jul 4, 2018, 4:03 AM

#

well, its not really firearms. and my characters fly, so they move pretty quick.

winged badger Jul 4, 2018, 4:03 AM

#

i mean, lots of projectiles flying around

#

not just an occasional spear toss, for example

#

while you are happy to obsess about how your simulation might be imperfect

#

if you have 20 projectiles shot by a player each minute, and plenty of other stuff for a player to do

#

its not what the player will focus on

dull stream Jul 4, 2018, 4:05 AM

#

that is a very fair point, and there will be lots of projectiles flying around

umbral adder Jul 4, 2018, 5:36 AM

#

what is DeltaTime?

teal crest Jul 4, 2018, 5:57 AM

#

Lol, what the heck?

📎 unknown.png

thin stratus Jul 4, 2018, 7:24 AM

#

So I wonder, we have a VR setup with Steam, where hosting, finding and joining sessions works just fine.
Now we want to add one of the Vive Trackers (or multiple ones later) to the whole setup, together with an Android device.
I had a setup for LAN Projects, where I could join the Host (Vive PC) and retrieve the Tracker Data from Network Data.
Not optimal, but working, as I can't send the data from the tracker to the Phone directly.

Now, with Steam and Online Multiplayer in the mix, I sense that this is pretty much impossible, at least without any custom solution.
Did anyone ever dive into this? I thought about multiple ways, but most of them have the problem of not being able to connect to Steam Sessions via Android.

bitter oriole Jul 4, 2018, 7:28 AM

#

Well, Steam sessions are user-based anyway

#

You wouldn't be able to join a session with the same user on two devices

#

You'll need to create a separate Steam account for your phone to access Steam, even if Steam was available on the phone

thin stratus Jul 4, 2018, 7:35 AM

#

Yeah, I probably need my own backend

#

Which is annoying, given that a simple ServerList for all Devices needs me to add NAT Punch Through stuff

vivid siren Jul 4, 2018, 9:25 AM

#

Can I just think out loud and maybe someone can confirm whether this approach is correct?

I need multiplayer compatible inventory, locomotion, and weapon systems. I'm going to make a standalone blueprint component for each one of those systems and then drop them all onto a simple character with an interface to tie it all together.
All three of these components will regularly update the player's PlayerState, which should keep all other players updated.

Does this sound reasonable?

#

I intend on using one large level with only a few players, perhaps I'll need some level streaming? I heard that might not work with multiplayer, so I don't know

chrome bay Jul 4, 2018, 12:17 PM

#

All three of these components will regularly update the player's PlayerState, which should keep all other players updated.
Nooooooo

#

Handle replication locally in the components themselves

#

Otherwise you're just adding unnecessary complexity

#

Also, with player states being always relevant you'll be wasting a lot of bandwidth when players are far away from each other

meager spade Jul 4, 2018, 12:37 PM

#

what would be the sanest way to get the local player controller in AHUD?

bitter oriole Jul 4, 2018, 12:39 PM

#

GetOwner() ?

meager spade Jul 4, 2018, 12:39 PM

#

didn't even think of that, what a numpty

bitter oriole Jul 4, 2018, 12:39 PM

#

It's the PC, not LocalPlayer - there's a small difference, not sure which you wanted

meager spade Jul 4, 2018, 12:39 PM

#

GetOwningPlayerController()

#

would probably be the one

distant wave Jul 4, 2018, 12:52 PM

#

@teal crest penis-kun uwu :3 What are you making a porn game or what?? 😂

teal crest Jul 4, 2018, 12:53 PM

#

As lucrative as that would probably be, no. Someone's steam lobby name for the test app id 😛

distant wave Jul 4, 2018, 12:54 PM

#

lol

distant wave Jul 4, 2018, 2:24 PM

#

I read eXI's guide on the Wiki on how to create custom C++ sessions

#

and when I write this line here

#

TSharedRef<FOnlineSessionSearch> SearchSettingsRef = SessionSearch.ToSharedRef();

#

It says ToSharedRef() is not a member of FOnlineSessionSearch

#

any idea why this occurs?

vocal dagger Jul 4, 2018, 2:56 PM

#

well it looks like SessionSearch is not a shared pointer, could you show us what is the type of SessionSearch?

distant wave Jul 4, 2018, 2:58 PM

#

It is FOnlineSessionSearch

#

@vocal dagger

vocal dagger Jul 4, 2018, 2:59 PM

#

well it has to be TSharedPtr<class FOnlineSessionSearch> SearchSettings;

#

I guess you didn't declare it like that on the header

distant wave Jul 4, 2018, 3:00 PM

#

oh

#

I declared it

#

@vocal dagger Look, this is how I declared it. TSharedPtr<class FOnlineSessionSearch> SessionSearch;

vocal dagger Jul 4, 2018, 3:00 PM

#

then you didn't properly create the shared pointer

#

here, this is how I did it

#

📎 devenv_2018-07-04_17-01-20.png

distant wave Jul 4, 2018, 3:02 PM

#

we did the same

#

@vocal dagger

vocal dagger Jul 4, 2018, 3:02 PM

#

then maybe it's a missing include?

distant wave Jul 4, 2018, 3:03 PM

#

what are ur includes

#

?

#

@vocal dagger

vocal dagger Jul 4, 2018, 3:03 PM

#

#include "OnlineSubsystem.h"
#include "OnlineSubsystemUtils.h"

distant wave Jul 4, 2018, 3:03 PM

#

where in cpp or h?

vocal dagger Jul 4, 2018, 3:03 PM

#

that's on the .cpp

distant wave Jul 4, 2018, 3:04 PM

#

and are u using steam

#

like I am

#

?

#

@vocal dagger

vocal dagger Jul 4, 2018, 3:05 PM

#

yeah that works for any subsystem

distant wave Jul 4, 2018, 3:05 PM

#

ok

vocal dagger Jul 4, 2018, 3:06 PM

#

I'm sure you can find that code in ShooterGame

#

if you need to find out what you are missing

distant wave Jul 4, 2018, 3:06 PM

#

ah I will take a look

#

thx for the help

vocal dagger Jul 4, 2018, 3:06 PM

#

sure

distant wave Jul 4, 2018, 3:12 PM

#

included those still not working gonna take a look at shooter game

distant wave Jul 4, 2018, 4:12 PM

#

@vocal dagger it is so strange

#

I am not missing anything

#

checked shootergame

#

what could be wrong

#

can I send you the whole function?

#

{
    IOnlineSubsystem* OnlineSub = IOnlineSubsystem::Get();

    if (OnlineSub)
    {
        UWorld* World = GetWorld();
        IOnlineSessionPtr Sessions = Online::GetSessionInterface(World);
        bIsLAN = false;
        bIsPresence = false;

        if (Sessions.IsValid() && UserId.IsValid())
        {
            FOnlineSessionSearch SessionSearch;

            SessionSearch.bIsLanQuery = bIsLAN;
            SessionSearch.MaxSearchResults = 500;
            SessionSearch.PingBucketSize = 50;

            if (bIsPresence)
            {
                SessionSearch.QuerySettings.Set(SEARCH_PRESENCE, bIsPresence, EOnlineComparisonOp::Equals);
            }

            TSharedRef<FOnlineSessionSearch> SearchSettingsRef = SessionSearch.ToSharedRef();

            OnFindSessionsCompleteDelegateHandle = Sessions->AddOnFindSessionsCompleteDelegate_Handle(OnFindSessionsCompleteDelegate);

            Sessions->FindSessions(*UserId, SearchSettingsRef);
        }
    }
    else
    {
        OnFindSessionsComplete(false);
    }
}```

vocal dagger Jul 4, 2018, 4:22 PM

#

@distant wave have you added the modules "OnlineSubsystem", "OnlineSubsystemUtils" into your Build.cs?

#

actually you might only need to include the module "OnlineSubsystem" since the FOnlineSessionSearch is part of that module

distant wave Jul 4, 2018, 4:25 PM

#

lemme check

#

yes

#

@vocal dagger

#

PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "OnlineSubsystem", "OnlineSubsystemUtils" });

vocal dagger Jul 4, 2018, 4:28 PM

#

well I don't know exactly if there is a difference there but I've them included under PrivateDependencyModuleNames

distant wave Jul 4, 2018, 4:29 PM

#

after checking out steam integration docs

#

I saw u need them in public dependencies

vocal dagger Jul 4, 2018, 4:29 PM

#

hmm ok

#

open SharedPointer.h in the engine and check if this is there

📎 devenv_2018-07-04_18-33-41.png

distant wave Jul 4, 2018, 4:39 PM

#

I checked. It is there. @vocal dagger

#

@vocal dagger any idea what could be wrong?

vocal dagger Jul 4, 2018, 5:15 PM

#

hmm

#

include Engine.h in your .cpp and the maybe the Engine and EngineSettings module?

#

it's for sure an include or module you are missing, where do you have this code? does your class have a parent?

rose egret Jul 4, 2018, 5:33 PM

#

hi guys 😐 how do I manage UE4 dedicated server instances ? has Steam dedicated servers or we should buy from other companies ..?

past totem Jul 4, 2018, 6:04 PM

#

How to "open menu level" when the server is closed (Blueprints)? @ me please

distant wave Jul 4, 2018, 6:34 PM

#

@vocal dagger I fixed it

#

it wasnt a pointer

#

thats why it didnt work

vocal dagger Jul 4, 2018, 6:57 PM

#

nice, good that you fixed it 😃

deft plaza Jul 4, 2018, 8:18 PM

#

has anyone gotten LogOnline: Warning: STEAM: Steam API disabled! error before?

winged badger Jul 4, 2018, 9:40 PM

#

if you have trouble figuring out why its happening

#

i find searching for the log string in source code, then reading what triggers it helps

twin vault Jul 4, 2018, 9:44 PM

#

I never play on consoles, are games with listen servers common there? do PSN/live have something like steam so its not needed to open ports?

#

cant find info about that anywhere :|

gilded olive Jul 4, 2018, 10:13 PM

#

Hi guys, I just tired to have the same problem in all the multiplayers project that I work in unreal. I wanted to know if anyway to know if all the variables of my actor are already replicated in my local client for initialization proposes. For example, when I spawn a character, I want to assign a team id to that character but in the begin play of mi local client it is possible that the property is not replicated already. So there is anyway to proper handle this problem?

vocal dagger Jul 4, 2018, 10:31 PM

#

you could replicate using a rep notify and once the var replicates you know it's available

winged badger Jul 4, 2018, 10:35 PM

#

you can have an "illegal" value set by default

#

and set it at runtime on server

#

teamID = -1

#

and as long as it is -1 it hasn't been replicated yet

vocal dagger Jul 4, 2018, 10:38 PM

#

When using online beacons, can someone tell me if I need to manually open a voice channel on the NetConnection for every beacon client or if by adding the configuration on the Engine.ini file is enough? I see the logs from LogVoice come as LogVoice: Starting networked voice for user: 0

teal crest Jul 5, 2018, 12:02 AM

#

Hey folks, I'm having some difficulty joining a session using the null OSS. I'm able to host a session with one client who then server travels to the lobby via World->ServerTravel("/Game/Levels/Lobby?listen"); When I open another client, I'm able to see the lobby. When I click and join the session, my on session join complete delegate is called, which then gets the address via SessionInterface->GetResolvedConnectString(SessionName, Address) . The returned address is logged as "Warning: Got the address, 192.168.56.1:0" -- he then proceeds to client travel via PlayerController->ClientTravel(Address, ETravelType::TRAVEL_Absolute); At this point, the log for this client stops at LogNet: Game client on port 0, rate 10000 for a minute until it eventually times out and initializes a local game mode (as shown by the Warning: Player Joined) in the attached screenshot log of the client.

📎 unknown.png

#

Hah... of course. I always figure it out 5 minutes after asking. Turns out specifying ?listen in the World->ServerTravel is not enough. You have to actually launch the game with ?listen in the initial connection url as well.

#

I wonder if ETravelType::TravelPartial would work for that use case

#

No effect

teal crest Jul 5, 2018, 12:44 AM

#

Can you set the transition map on a per game-mode basis? I can't find which function would set it in the docs

#

Seems like only a global config.

gilded olive Jul 5, 2018, 12:57 AM

#

@vocal dagger yep, I already do that, but it is a pain in the ass track all the variables in every on rep, lets assume that I need team ID and squad ID to set some things in the localclient, In the two on rep methods I should check that the other one is replicated too, scale quickly this approach.

#

@winged badger Yes, i usually use "INDEX_NONE" for that. Well I guess there isnt a making way to handle this

#

Thanks guys!

teal crest Jul 5, 2018, 1:33 AM

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Is there a simple way to add a delay to a transition map during seamless travel so I can visualize how it looks in testing?

umbral adder Jul 5, 2018, 3:00 AM

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@deft plaza its a false positive

deft plaza Jul 5, 2018, 3:21 AM

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@umbral adder thanks

jade patrol Jul 5, 2018, 12:24 PM

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Hey guys, I'm trying to replicate a cube which works good, but on client it appears with an offset, why and how can I fix this ??? physics and collisions are sync, but it just appears in wrong place

📎 Capture3.jpg

jade patrol Jul 5, 2018, 12:47 PM

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the weird thing is that if I don't set simulate physics, it appears in right place

icy nacelle Jul 5, 2018, 2:11 PM

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@jade patrol This is probably because that event begin play would only run on the servers version - so the cube is having its physics simulated on his version of the game - the other client has no indication that this is happening.

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(My guess anyway - I'm not expert at networking)

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I'm trying to prototype a mining resource for my game, I'm using a byte to control which state the node is in - Currently trying to spawn the resource node when the destructible mesh is opened up. The wood does spawn for the clients but when its picked up, the wood doesnt go into the player's inventory - instead its just destroyed and not added to his array. I dont have any problems elsewhere with picking up items that are spawned / dropped. Any ideas?

📎 1.PNG

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📎 2.PNG

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📎 3.PNG

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(Works just fine on singleplayer)

distant wave Jul 5, 2018, 3:10 PM

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after following the tutorial here: https://wiki.unrealengine.com/How_To_Use_Sessions_In_C%2B%2B

How_To_Use_Sessions_In_C%2B%2B

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I kinda changed the code a bit so it works for dedicated servers

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The server crashes as soon as it starts

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📎 errors.PNG

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DM me for code files

winged badger Jul 5, 2018, 3:12 PM

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dedicated servers don't have local players

distant wave Jul 5, 2018, 3:13 PM

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ah that must be it then

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but how do I get a player that isn't local?

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@winged badger

winged badger Jul 5, 2018, 3:13 PM

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you get some when they connect to the dedi

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but yea, local player, means local player controller which in turn means that its not a dedicated server

distant wave Jul 5, 2018, 3:15 PM

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can you give me an example of code

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of how would I get a player

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cuz im pretty basic to cpp

winged badger Jul 5, 2018, 3:15 PM

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i can't, i just know in general on how they work

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haven't used them

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and until someone connects to your dedi server there is no player

distant wave Jul 5, 2018, 3:16 PM

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ah should I use the post login function?

winged badger Jul 5, 2018, 3:16 PM

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you should have a valid PC at that time, yes

distant wave Jul 5, 2018, 3:16 PM

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ok

drifting plank Jul 5, 2018, 3:34 PM

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Hello here ! I'm in trouble with the network relevancy. I don't found any good document about it and I didn't understand how it works exactly.
I have changed the netCullDistanceSquared in my player blueprints, they are correctly replicated until they are too far.
But when an actor come back inside the net radius, he doesn't reappeared. Do I have to do a specific action (I've tried FlushNetDormancy but It doesn't seems to do anything).

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Thanks in advance for any tips 😃

distant wave Jul 5, 2018, 3:51 PM

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@winged badger but can I do the Local Player thing for the clients

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when they are joining the server

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for example, when they are searching for servers

distant wave Jul 5, 2018, 4:13 PM

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@winged badger I am still getting the error

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it didn't work

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I tried getting PlayerController unique ID

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alright I will try one more thing and that's it

distant wave Jul 5, 2018, 4:40 PM

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solved it @winged badger

distant wave Jul 5, 2018, 6:26 PM

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Hey everybody

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do you have any idea why I get these warnings for when I am searching my dedicated server?

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I am using my own appid

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[2018.07.03-18.45.17:926][229]LogNetVersion: StandYourGround 1.0.0.0, NetCL: 0, EngineNetVer: 2, GameNetVer: 0 (Checksum: 2374043608)
[2018.07.03-18.45.18:087][239]LogOnline: Warning: STEAM: Rules response NUMOPENPRIVCONN 0
[2018.07.03-18.45.18:088][239]LogOnline: Warning: STEAM: Rules response NUMOPENPUBCONN 100
[2018.07.03-18.45.18:088][239]LogOnline: Warning: STEAM: Rules response OWNINGID 90115716982511623
[2018.07.03-18.45.18:088][239]LogOnline: Warning: STEAM: Rules response OWNINGNAME SYG
[2018.07.03-18.45.18:088][239]LogOnline: Warning: STEAM: Rules response P2PADDR 90115716982511623
[2018.07.03-18.45.18:088][239]LogOnline: Warning: STEAM: Rules response P2PPORT 7777
[2018.07.03-18.45.18:089][239]LogOnline: Warning: STEAM: Rules response SESSIONFLAGS 683
[2018.07.03-18.45.18:089][239]LogOnline: Warning: STEAM: Rules response SYGServerName_s EU StandYourGround Game
[2018.07.03-18.45.18:089][239]LogOnline: Warning: STEAM: Rules refresh complete
[2018.07.03-18.45.18:089][239]LogOnline: Warning: Unknown or unsupported data type from Steam key data NUMOPENPRIVCONN 0
[2018.07.03-18.45.18:089][239]LogOnline: Warning: STEAM: Failed to parse setting from key NUMOPENPRIVCONN value 0
[2018.07.03-18.45.18:089][239]LogOnline: Warning: Unknown or unsupported data type from Steam key data NUMOPENPUBCONN 100
[2018.07.03-18.45.18:089][239]LogOnline: Warning: STEAM: Failed to parse setting from key NUMOPENPUBCONN value 100```

winged badger Jul 5, 2018, 10:01 PM

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i saw something exactly like that few days ago

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someone with exact same problem

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no idea what it was about, or what and if there was a solution, but you can try searching for it

pale thorn Jul 5, 2018, 10:29 PM

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Hey folks! Maybe some of you can tell me if this is bad or is there another way to solve this?

This example is working. But I'm not happy with the way from the Server back to the Client and back to the Server again to call the Multicast.

If I take the Location/Rotation from Arrow1 on the Server, I've a completly off Projectile Spawn on the Client.

I thought that the Server is always aware of the Client-data. But it seems the server just don't know the correct informations.

📎 unknown.png

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This example would calculate the correct Rotation for the Server however the Client is totally off.
So.. do I've to roundtrip over the Client or is there a smarter solution?

📎 unknown.png

pale thorn Jul 5, 2018, 11:10 PM

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Okay checked net stat and it looks fine (as I only have max 4 people shooting).

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Going to sleep now. If someone has still an hint, please send me a PM :-) Thanks!

icy nacelle Jul 6, 2018, 1:00 AM

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@pale thorn You're calling a RPC twice, might be best to only do it on the second event and not the first

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Its probably getting the wrong instance of 'Arrow 1'

hot robin Jul 6, 2018, 3:01 AM

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anyone awake here? 😃

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Client 1 sees Client 2 walking fine || Client 2 sees Client 1 walking fine || BUT Client 1 sees Client 2 Jitter/twitch when Client 1 is moving || Client 2 sees Client 1 Jitter/twitch when Client 2 is moving

umbral adder Jul 6, 2018, 4:27 AM

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📎 unknown.png

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when in lobby are we connected to fortnite server's or backend?

drifting plank Jul 6, 2018, 6:59 AM

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I think it's connected on a server which handle all lobbies ! We have some events which can be triggered like "skin change", "emote", "mode selection", ...

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NetPeggle Do you update the movement of each client in the server only or do you work the logic on clients ?

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Any answers for my question ? I didn't find a good document about it on internet :/ ?
I talk about "Relevancy and dormant actor"

red ledge Jul 6, 2018, 9:40 AM

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hey guys
I wanted to make a small matchmaking system, something like overwatch or league of legends where you press play and you're matched with other players but can also go with your squad

I want it to work on dedicated servers so I already know that I can start multiple instances on different ports but how do I manage that? is there anything in the engine that supports that or do I have to use some external master server and communicate with the client through it?

full bane Jul 6, 2018, 10:20 AM

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you'd want to use third-party thing for that

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so having the players stay in their own local instances of the lobby/main-menu.
Then call a third party match-making thing like steam, gamesparks or even a custom thing running on another server.
Then as soon as a match is found, send all players to the same server

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For the dedicated servers, you either need a master server list or something that starts servers everytime you need another instance - like gamelift

red ledge Jul 6, 2018, 11:01 AM

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I was thinking of something that starts a server every time I need one to save on resources

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so with dedicated servers I can't use steam?

full bane Jul 6, 2018, 11:02 AM

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are you only talking about the server structure?

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or the matchmakign process

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or both

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gamelift has everyting integrated

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matchmakign and launching dedicated server instances whenever you need them

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and taking care of ports and stuff like that

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you can use steam and gamelift

red ledge Jul 6, 2018, 11:03 AM

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both in a way

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sorry can you explain more about steam? what can I use it for for a system like this?

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I didn't want to have to deal with the login and friendlist etc

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so I was thinking of using it

full bane Jul 6, 2018, 11:04 AM

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Well, it has integrated matchmaking, friendlists, lobbies etc.

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you have to handle your own serverinstances with it though

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so thats a huge downside

red ledge Jul 6, 2018, 11:05 AM

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so if I got greenlit I can customize that matchmaking?

full bane Jul 6, 2018, 11:05 AM

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greenlight is dead 😃

red ledge Jul 6, 2018, 11:05 AM

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oh

full bane Jul 6, 2018, 11:05 AM

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but yes, you can customize matchmaking

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with ELO and stuff like that

red ledge Jul 6, 2018, 11:05 AM

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I have been out of the pic for a while haha

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gotcha

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and gamelift is for managing dedicated servers

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right?

full bane Jul 6, 2018, 11:05 AM

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ya

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you can basically dynamically add and remove instances whenever you need them

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but it also has matchmaking for you

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afaik a fully integrated solution with matchmaking and enabling server instances for those matches

red ledge Jul 6, 2018, 11:06 AM

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that's really useful

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tho I wanted to make most of it from scratch kinda

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since it's for a graduation project

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so making network stuff = more points haha

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but I'll see about that

full bane Jul 6, 2018, 11:07 AM

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oh

red ledge Jul 6, 2018, 11:07 AM

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thank you that was very helpful

full bane Jul 6, 2018, 11:07 AM

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well then, it is probably a good idea to write everything from scratch then

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there only a couple of moving parts involved when you don't have to take scale into account

red ledge Jul 6, 2018, 11:08 AM

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yeah I will try node.js or something

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to make something very simple

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just that I wanted to have the game future proof

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if we wanted to try and make it into a product

hot robin Jul 6, 2018, 1:10 PM

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@drifting plank its 3rd person template + replication activated wich should handle movement and even sprinting looks fine if other people see them sprinting or walking but the person who is walking or sprinting sees everyone else as soon as the person moves "jitter"

gusty raptor Jul 6, 2018, 2:02 PM

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Hi, anyone knows how to get a clean player id (0,1,2,3) inside anything like pawn/playerstate etc.?

vocal dagger Jul 6, 2018, 2:08 PM

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for any local players you can find the player id in by getting the LocalPlayer::GetControllerID(), for networked players you could find their IDs in their respective player state

verbal wave Jul 6, 2018, 2:13 PM

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can someone confirm if OnRep function works for an vector array?

📎 unknown.png

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My OnRep_GreenLocations never executes. Not sure if it's fault on my end.

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Huh. So it executes on client 1, but not the server. Same as C++ OnRep functions.
(BP OnRep functions usually always execute on both server & clients)

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So weird.

vocal dagger Jul 6, 2018, 2:42 PM

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does anyone have an idea of how to setup voice communication when using Online Beacons?

glossy vessel Jul 6, 2018, 2:50 PM

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i successfully integrated gamelift to run my dedicated servers. the next step would be to have matchmaking and a friendlist. since amazon doesn't support that i have to roll my own system. i saw that ut uses a onlinesubsystemmcp for that, has anyone any information on that? i can't seem to find anything

worthy wasp Jul 6, 2018, 4:38 PM

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@glossy vessel - you're wrong. https://docs.aws.amazon.com/gamelift/latest/developerguide/match-intro.html

Matchmaking with FlexMatch - Amazon GameLift

Set up your game to use Amazon GameLifts FlexMatch feature to match players into games.

glossy vessel Jul 6, 2018, 4:40 PM

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@worthy wasp doesn't say anything about a friends feature

worthy wasp Jul 6, 2018, 4:40 PM

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Friendslist - https://serverfault.com/questions/470486/amazon-simpledb-architecture-for-an-user-with-a-friends-list

Server Fault

Amazon SImpleDB Architecture for an user with a friends list

I am relatively new to database designing. I am currently using amazon SimpleDB to provide my application with information, so far its been relatively good and efficient until just now.
Basically, ...

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allow me to do your reserach for you please....

glossy vessel Jul 6, 2018, 4:41 PM

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thats a basic database, there is no chat etc

worthy wasp Jul 6, 2018, 4:42 PM

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did you come here for a quick tutorial on "HowToProgram-101" ?

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cuz thats nto so quick

glossy vessel Jul 6, 2018, 4:43 PM

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did you even read my original comment?

worthy wasp Jul 6, 2018, 4:43 PM

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This one?

i successfully integrated gamelift to run my dedicated servers. the next step would be to have matchmaking and a friendlist. since amazon doesn't support that i have to roll my own system. i saw that ut uses a onlinesubsystemmcp for that, has anyone any information on that? i can't seem to find anything

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cuz within 2 minutes i found google searches relevant

glossy vessel Jul 6, 2018, 4:43 PM

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whatever

worthy wasp Jul 6, 2018, 4:43 PM

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its not whatever and why are you getting defensive

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i gave you 2 relevant info links

glossy vessel Jul 6, 2018, 4:44 PM

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yh, but i still have no clue what onlinesubsystemmcp.h is, there is no file in the engine

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runtime, or plugin folder

worthy wasp Jul 6, 2018, 4:45 PM

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did you google search that too?

glossy vessel Jul 6, 2018, 4:45 PM

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ofc

worthy wasp Jul 6, 2018, 4:45 PM

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cuz again - pulled up a website with that error top link

glossy vessel Jul 6, 2018, 4:46 PM

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yh error

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because the file doesnt exist

worthy wasp Jul 6, 2018, 4:46 PM

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https://answers.unrealengine.com/questions/64991/slatesteam-how-do-i-use-sfriendslist-and-the-frien.html

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and an error-answer too

glossy vessel Jul 6, 2018, 4:46 PM

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that is again not relevant to my question

worthy wasp Jul 6, 2018, 4:46 PM

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you asked about chat system

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which is exactly what that article is about

glossy vessel Jul 6, 2018, 4:47 PM

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i asked what the onlinesubsystemmcp is

worthy wasp Jul 6, 2018, 4:47 PM

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its a file in the engines source.

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if you were to search the UE4 source files - it does exist.... and need to include a module to have it findable

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otherwise - you get that error.

glossy vessel Jul 6, 2018, 4:48 PM

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what module?

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and where can i get it?

worthy wasp Jul 6, 2018, 4:50 PM

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try enabling the OnlineSubSystem module in your projects build.cs file..... i'm not at my dev computer (at work atm) and that should unlock the OSSMCP.h file for you

glossy vessel Jul 6, 2018, 4:50 PM

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it doesnt

worthy wasp Jul 6, 2018, 4:51 PM

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then unfortunately i'm not much help to you for the next 5 hours 😦

glossy vessel Jul 6, 2018, 4:51 PM

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onlinesubsystem and onlinesubsystemutils aren't related to this subsystem as far as i can see

worthy wasp Jul 6, 2018, 4:51 PM

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still at work.

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when you say they DONT WORK - what do you mean?

glossy vessel Jul 6, 2018, 4:52 PM

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well they work, but they are not related to the subsystemMCP