Here’s a little piece on the different pictures of linear least squares I wrote for towardsdatascience. All the code used to generate the plots can be found in this github repo.
Back in 2016, I took part in a large open-source program called Google Summer of Code or GSoC. Specifically, I worked with an organization called BRL-CAD which specialised in a computer-aided design (CAD) software. Here is the official project page from GSoC archives.