This is my attempt to make something that does 3D using SDL2 and C.
Very simple, it just uses a perspective projection to put a rotating cube on the screen.
(relatively simple)
I made some mistakes:
- Didn't know why they added the fourth term to the vector, so I ignored it and used 3-vectors (big mistake).
- Used too many structs when I could've used arrays.
- The debug code causes a segfault (I removed it).
- Very messy.
- Didn't know how to store complicated data, so I just created a header file that adds the object at compile time.
It does render something which is miraculous, but I wouldn't go as far as to call it a "cube".
At the last moment I put in a orthographic projection and that also didn't work.
I might revisit this project after I figure out what I'm doing.
Wikipedia seems like it's only for people who already know the topic they are learning.
You need to have the SDL2 development package installed. On apt this package is called libsdl2-dev.
You then compile it with [compiler] test_projection.c -lm -lSDL2 -lSDL2main.
test_functions.c is only for testing matrix.h.
If you aren't using linux then do the correct thing that you're supposed to do.
Despite all this, I learned a lot doing this. I still don't completely understand them but I can tame pointers and arrays a bit more.
Doing this brought back my interest in doing stuff like this. Before I was fixated on chemistry but now I want to wield the power of the computer. This might not last long, but even if I stop, I will still have learned something. And I think that's fine.