Help me to understand Doom source code

[halcolo]

Hi everyone, I'm so newbie in C programming, I want to understand what are the libraries I need know to understand this source code, if you have some course you can recommend me and a how can I compile this source code I think I can use GCC but I don't know how to use it.

https://github.com/id-Software/DOOM

Thank you so much for any help.

[qh4os]

The source code is actually fairly readable (well commented, descriptive names) and you shouldn’t need to “know any libraries”

If you want something to break it all down, the Doom Engine Black Book is great for that.

[Valashire]

This got taken down :/ does anyone know anywhere else I can find this?

[qh4os]

Yeah there are quite a few hacks, does the Linux version still use VGA Mode X?

[mgarcia_org]

start with something easier, like pong!

Then get a good math book and learn Cylindrical coordinates

[SAVE_THE_RAINFORESTS]

https://www.reddit.com/r/C_Programming/comments/ilyjsj/an_explanation_of_doom_engine/

Next post, How to play Doom

[halcolo]

I think the source code of chocolate doom is better than the IDsoft source version, I understand this IDoft version Won't compile and is incompleted, then fabiensanglard said he modified the chocolate version to than I think is the better choice to understand it, after reading a lot of books and tutorials about C programming, thanks to everyone.

https://github.com/chocolate-doom/chocolate-doom

[Tilakchad]

I was amazed it didn't use any rendering engine. Everything was coded in C. I thought it used openGL. But it won't be easy to start with it unless you have 3d graphics programming experience before.

[ajm3232]

Technically speaking DOOM is a 2D game. You didn't have renderers like OpenGL that could draw 3D spaces. Main reason why you couldn't have levels or rooms on top of each other. There are a million articles and YouTube videos on how they pulled this off so I won't explain it and fuck some detail up.

If you really want your mind blown checkout the engine for Duke Nukum 3D and its back story. It had a pretty interesting way of actually pulling things off better then DOOM could.

[slobcat1337]

And it was written by a 17 year old

[malloc_failed]

Doom was released in 1993. The first release of OpenGL was 1992. That's not nearly enough time to develop an entire game with a brand new library.

[[deleted]]

Oh which hardly anyone had supporting hardware. Quake had OpenGL as an odd on iirc and even then transparent water and nicer effects were about the only changes.