Table of Contents
ATTENTION..............................................3
Introduction.............................................4
Network in Unreal................................5
Framework & Network......................7
Common Classes....................................10
Game Mode.......................................................11
Examples and Usage...............................12
Blueprint..................................................12
UE4++......................................................16
Game State........................................................19
Examples and Usage...............................20
Blueprint..................................................20
UE4++......................................................23
Player State.......................................................25
Examples and Usage...............................26
Blueprint..................................................26
UE4++......................................................28
Pawn......................................................................30
Examples and Usage...............................31
Blueprint..................................................31
UE4++......................................................35
Player Controller.............................................39
Examples and Usage...............................41
Blueprint..................................................42
UE4++......................................................44
HUD.......................................................................47
Widgets (UMG)................................................48
Dedicated vs Listen Server...........49
Dedicated Server.....................................49
Listen-Server..............................................50
Replication.............................................51
What is 'Replication'?............................51
How to use 'Replication'.......................52
Replicating Properties..........................53
Remote Procedure Calls................58
Requirements and Caveats................................59
RPC invoked from the Server......................................60
RPC invoked from a Client.............................................60
RPCs in Blueprints..................................................61
RPCs in C++..............................................................62
Validation (C++)..................................................................64
Ownership...........................................................66
Actors and their Owning Connections..........68
Actor Relevancy and Priority.....................70
Relevancy.....................................................................70
Prioritization...............................................................72
Actor Role and RemoteRole......................74
Role/RemoteRole Reversal...............................75
Mode of Replication...............................................76
ROLE_SimulatedProxy.....................................................77
ROLE_AutonomousProxy...............................................78
Traveling in Multiplayer.................................79
Non-/Seamless travel..........................................79
Main Traveling Functions....................................80
UEngine::Browse................................................................80
UWorld::ServerTravel......................................................81
APlayerController::ClientTravel...................................81
Enabling Seamless Travel...................................82
Persisting Actors / Seamless Travel...........83
Online Subsystem Overview........................84
Online Subsystem Module...................................85
Basic Design........................................................................85
Use of Delegates................................................................86
Interfaces...............................................................................87
Profile.......................................................................................87
Friends....................................................................................87
Sessions.................................................................................88
Shared Cloud........................................................................88
User Cloud.............................................................................88
Leaderboards......................................................................89
Voice..........................................................................................89
Achievements.......................................................................89
External UI...............................................................................89
Sessions and Matchmaking................................90
Basic Life-Time of a Session..........................................91
Session Interface................................................................92
Session Settings..................................................................93
Session Management.......................................................94
Creating Sessions.........................................................94
Create a Session via Blueprint ......................94
Create a Session via C++...................................94
Updating Sessions........................................................95
Destroying Sessions....................................................96
Destroy Session via Blueprint...........................96
Destroy Session via C++.....................................96
Searching Sessions.....................................................96
Searching Session via Blueprint......................97
Searching Session via C++................................97
Joining Sessions............................................................98
Joining Session via Blueprint............................98
Join Session via C++.............................................98
Cloud-Based Matchmaking............................................99
Following and Inviting Friends....................................100
How to Start a Multiplayer Game..........101
Advanced Settings................................................102
Use Single Process.........................................................104
Run as Dedicated Server.............................................105
Start and Connect to a Server.......................106
Blueprint...............................................................................106
Start a Server..............................................................106
Connect to a Server.................................................106
UE4++...................................................................................107
Start a Server..............................................................107
Connect to a Server.................................................107
Starting via Command Line........................................108
Connection Process.............................................109
The major steps are.......................................................110
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