This ia a simple python raycasting engine made in python. To run it, you must have Python3 and PyOpenGL.
Python can be installed from the website
To install PyOpenGL, you can go to the documentaion
Once both are ready and configured, download or clone ray.py and use python ray.py to run it.
Once the program starts, you'll see 2 views : A 2D map with the player and all the rays, and a 3d, raycasted projection. Use WASD to move, and Q to teleport.
The algorithm, though it may appear complex, is actually really simple and fast, and hence was used on many classic games like Wolfenstien 3D, to great effect on the limited hardware of the time. If you want to learn more about the algorithm, this guide is a excellant starting point.
In order to change the map, simploy edit the 64 element long world list. it is formatted so thet a 0 is a space and a 1 is a block.