A look back at the technology of Wolfenstein 3D

Raycasting is a rendering technique to create a 3D perspective in a 2D map. Back when computers were slower it wasn't possible to run real 3D engines in realtime, and raycasting was the first solution. Raycasting can go very fast, because only a calculation has to be done for every vertical line of the screen. The most well known game that used this technique, is of course Wolfenstein 3D.

If you're into gaming and want to see the game that started the first-person revolution then this is a pretty interesting read.

Link:
http://student.kuleuven.be/~m0216922/CG/raycasting.html