A minimal raytracer
While it is nothing to do with obfuscation, I can recommend Peter Shirley's blog http://psgraphics.blogspot.com/and the "Build a renderer in a weekend"http://in1weekend.blogspot.com/2016/01/ray-tracing-in-one-we...I've recently been making a Julia version from the C++ source codehttps://github.com/lawless-m/Jender