3D vizualisation written in Python using PyQt

This was a project for a class in school. The assignment was to create a simple 3D visualization program without using any 3D libraries. The program shows a "world" including walls in a grid. The walls file contains an example "world" with a few walls, that can be loaded into the program. You can move in the world using arrow keys or W,A,S,D, rotating with Q and E. Space places a wall two spaces in front of the "eye" and backspace deletes a wall.