A simple experiment with ray casting and C.

Play online: https://reznakt.github.io/ray-casting/

This project is a simple experiment with ray casting and C. It's not really a game, but rather a proof of concept. You can walk around and observe the environment, which consists of walls and an open sky.

I previously made something similar in Python, but it was quite slow (~100 fps), so I wanted to see how fast it could be in C (it's ~2000 fps). I also really like C and ray casting, so it's a fun project indeed.

• C99
• CMake
• SDL2

sudo apt-get install -y cmake libsdl2-dev libsdl2-gfx-dev

To get a local copy up and running, follow these simple steps:

git clone https://github.com/reznakt/ray-casting.git && cd ray-casting
cmake -B build/
cmake --build build/ -j$(nproc)

You can also run the app with Docker. Here's an example docker-compose.yml file:

services:
  ray-casting:
    image: ghcr.io/reznakt/ray-casting:latest
    container_name: ray-casting
    tty: true
    user: 1000:1000
    environment:
      XDG_RUNTIME_DIR: /tmp
      WAYLAND_DISPLAY: $WAYLAND_DISPLAY
      SDL_VIDEODRIVER: wayland,x11
      DISPLAY: $DISPLAY
    volumes:
      - $XDG_RUNTIME_DIR/$WAYLAND_DISPLAY:/tmp/$WAYLAND_DISPLAY
      - /usr/share/wayland-sessions/:/usr/share/wayland-sessions/:ro
      - /tmp/.X11-unix:/tmp/.X11-unix:ro
    devices:
      - /dev/dri:/dev/dri

Currently, there are no game features per se. You can walk around and observe the environment. However, you can configure various parameters by modifying the header files:

• Screen size
• Field of view
• Number of rays
• Keymappings

Normal mode

Flat mode

This project is licensed under the MIT license - see the LICENSE file for details.

• Lode Vandevenne for the legendary ray casting tutorial