For this Advanced C ++ Knowledge Unit project, R-Type will present the development of network video games. Implementation of a multi-threaded server and a graphical client, using a reusable game engine of our own design. The game should also be fun to play! The purpose of this project is to create a one-to-four player game, using a client/server architecture. This is important. It MUST be a client/server architecture. Peer-to-peer communication is not allowed.
The goal of this project is to create a multi-player video game based on the rules of the R-Type game. The game must be playable in local and network mode. The game must be composed of a server and a client. The server must be able to manage several simultaneous game rooms. The client must be able to display the game in real time. The client and the server must be able to communicate using the UDP protocol. The server and the client must be able to run on multiple operating systems (Windows, Linux, MacOS).
git clone git@github.com:EpitechPromo2026/B-CPP-500-LIL-5-2-rtype-david.plouvier.gitmkdir build && cd build
cmake .. && makeTo launch the server, you need to run the following command:
./rtype_serverTo launch the client, you need to run the following command:
./rtype_clientOnce the binary is launched, you will come to this page:
On this page, click on the "Init Server Connection", you will come to this page:
On this page, you can enter the IP address of the server and the port you want to connect to. Once the connection is established, you will see it on the page like this
Now you can click on "esc" on your keyboard to go back to the main menu and click on "Access Game" to join the server and you will come to this page and enjoy the game.
Now, let’s get to the heart of the matter with the architecture of our project, Our project is divided into 3 main parts, the server, the client and the ECS (Entity Component System) engine.
to illustrate our architecture, we made a schema:
We can see on this diagram the 3 main parts of our project as well as how they communicate with each other, where the C represents the customer, the S the server and GE the game engine
On our Project, the server and the client are two separate programs, they communicate with each other using the UDP protocol, the server is responsible for managing the game rooms and the client is responsible for displaying the game and sending the player's actions to the server.
Entity Component System (ECS) is a software architectural pattern mostly used in video game development for the representation of game world objects. An ECS comprises entities composed from components of data, with systems which operate on entities' components.
ECS follows the principle of composition over inheritance, meaning that every entity is defined not by a type hierarchy, but by the components that are associated with it. Systems act globally over all entities which have the required components.
The User Datagram Protocol (UDP) is one of the core members of the Internet protocol suite. The protocol was designed by David P. Reed in 1980 and formally defined in RFC 768.
The role of this protocol is to allow the transmission of data (as datagrams) in a very simple way between two entities, each being defined by an IP address and a port number. No prior communication is required to establish the connection
Then the UDP protocol is used to communicate between the server and the client, the server sends the client the information it needs to display the game and the client sends the server the actions of the player.
If you want to know more about the UDP protocol, you can read it here:
- [Ewen Talleux]
- [David Plouvier]
- [Simon Riembault]
- [Nathan Delenclos]
- [Benjamin Goussard]