A C raycaster is a program that simulates a 3D environment by casting rays from the player's position and calculating the intersections with objects in the scene. This raycaster consists of a game player that can move and change angle, and 3D walls that are drawn from 2D maps with shaded textures.
The internal workings of the raycaster use a digital differential analyzer (DDA) algorithm to interpolate values faster while detecting horizontal or vertical lines. This allows for efficient rendering of the 3D environment and smooth movement of the player.
Overall, the C raycaster provides a fun and interactive experience for users to explore a 3D environment in real-time, with the ability to move and interact with the virtual world.