Raycasting 2D space to 3D

2.5D raycasting-based game engine built in C++ (with SFML) that simulates a 3D environment using efficient 2D rendering techniques — inspired by early classics like Wolfenstein 3D.

Features:

• Real-time raycasting renderer for walls, objects.

• Multiplayer networking via shared memory to python networking modules with multiple streams for communication via multithreading.

Following video demonstrates how raycasting logic works:

• There are 400 rays casted in a range of 60* FOV , each ray fills 2 pixels of horizontal area on a resolution of 800 pixel window.

Struture of Interprocess Communication:

                        ┌────────────────────────────┐
                        │     Python Client (Net)    │
                        │────────────────────────────│
                        │  1. Connect to server      │
                        │  2. Receive other players  │
                        │  3. Write to RECV shm      │
                        │  4. Read from SEND shm     │
                        └───────────┬────────────────┘
                                    │
                         RECV shm   │   SEND shm
                   (game reads  )   │   (game writes  )
                                    │
                        ┌───────────┴────────────────┐
                        │   C++ Raycasting Engine    │
                        │────────────────────────────│
                        │  1. Read RECV shm updates  │
                        │  2. Update game state      │
                        │  3. Render scene (SFML)    │
                        │  4. Write player state     │
                        │     to SEND shm            │
                        └────────────────────────────┘

Demo of two clients POV

(couldn't control both at a time on same window):

Build and running the code:

Build:

mkdir build
cd build
cmake ..
cmake --build .
cd ..

Run python server:

python3 Network/server.py

Run the clients:

• Shared memory names to be specified explicitly (to avoid conflits while testing multiplayer, will be fixed).

./run_pair.sh <shm_name1> <shm_name2>

Future improvements and Fixes:

• Change the main entry point to somewhere clean.
• Add textures and sprites.
• Improve game logic similar to an Fpp game interaction
• Make the launching of the game easier.