This is a cool project! - CMake, yay! These make generating build files for a variety of platforms (even Windows) a breeze. It also works with code completion stuff (CLion IDE, KDevelop both have CMake-based projects) - I like how it splits stuff up as well ( https://github.com/klaussilveira/qengine/tree/master/src/gam... ). - As for vendorizing SDL2, there is an opportunity for optimization: The shared libraries and…
The game code is very well separated from the engine, and qengine already removes a lot of non-generic game code from Q2. So all you have to do is delete a little bit more, write some glue code to tie in Lua, and you can write the entire game logic in a separate codebase, with a separate license. Also, you get moddability.