Enregistrement.de.l.ecran.2024-08-04.a.21.59.29.mp4
It's a small demo of how a multiplayer game can be achieved in C++. It doesn't use any remote server, rather a player is a designated host while others are client. It uses Raylib for the graphical part otherwise the C/C++ standard libraries
The Host controls the red ship (shown grey on clients) while clients can spawn balls under their mouse cursor by hitting space. This basic project demonstrates client/server interactions on both sides and how to synchronize between both.
Using CMake/make
mkdir build
cd build
cmake ..
make
Untested and unconfigured for other IDEs (Xcode, VS, etc.) Raylib is self contained in the repository for simplicity.
Once built, start the Net executable with the -h command line argument to start a host instance.
Then start as many Net instances as desired.
Host session shows the triangle in red, client sessions are able to spawn balls by hitting space.
I didn't implement any logic for a client to join the host if it's created first so a host session must be started first.
This only works on localhost
The game code lives in game.cc and the host/client logic is cluttered together, I'll agree it's not ideal for readability but this is a weekend project. I tried to keep the code running in the net thread inside net.cc, this is where socket binding/message sending is done. There is some overlap with game logic obviously but I tried to keep it minimal
- Under certain angle, the interpolation on client side messes up for the triangle, i didn't bother fixing it.
- Shutting down a client session also shuts down the host session. This is undesirable and, as a consequence, logic for when a client leaves is untested.
- Overall the project lacks safety and error checking making it quite fragile.
This project uses UNIX socket and thus, does not work on Windows.