This is a fully 3D classical Doom software level renderer, written from scratch using SDL2. Currently, there are no plans on implementing enemies, things, weapons, and anything else not directly relevant for graphics.
The project requires AVX-512 support for !master branch, while !master-old is an old, unsupported version, can run anywhere, but has compile-time variations based on available instruction sets (up to and including AVX2)
The project is written for Visual Studio 2022 and corresponding version of it's inbuilt compiler.
The project uses SDL2 and self-made libraries. SDL2 can be downloaded from their site, self-made ones are included in the src/bob directory
You will need a commercial Doom 2 WAD file in the root of the project directory (if you are running from Visual Studio), or in the same directory as the compiled exe. The program will load MAP01 automatically, maps can be changed by inputting their number with keyboard (i.e. pressing 1, 5 will warp you to MAP15). Map numbered less than 10 have a leading 0 in their name (MAP02, MAP05, etc).
You will also need all the textures in PNG format unpacked and put into data/graphics directory.
Other than learning SIMD and 3D graphics - none. This project can be useful to see low level stuff, how image is made, how transformations, lighting, etc works, without APIs doing most of the heavy lifting.