A simple raytracer built without any graphics APIs, as detailed in Ray Tracing in One Weekend and Ray Tracing: The Next Week . It did, in fact, take nearly a weekend (+ another 5-6 days).
The project is purely educational, I was interested in how raytracing worked in old Wolfenstein-style games, and wanted to write my own. Though this doesnt resemble a project of that sort, im happy with the result and learning.

Setup

Make sure you have CMake installed, as that is the build system used here. (You can build the project hassle free with just g++ or a Makefile too, there are zero external dependencies, and most of the code is in header only files) The program works by writing to a .ppm file, so make sure you have an image loader for that format.

• Create a build directory for your executable using mkdir build
• cd into the /build directory
• Run cmake ../ and cmake --build .. to build your executable.
• Run the program and write the contents (after specifying which scene you would want to render in main.cpp) into a ppm file. On bash, this is ./Raycaster > render.ppm
• You can view some of my renders from the book by running feh on the renders inside the \renders directory.
• View the render with an image viewer of your choice, ex :- feh render.ppm

Future plans

• Satisfied with how much I've learnt, need to dig further into the math behind Perlin noise, maybe will add other geometric primitives, rotations when free, but not very likely.