Eigen not working

[melonlireal]

it appears I failed to clone Eigen onto my desktop and I cant open it on github. How can I fix this?

[lynnnnnn22]

Maybe try cloning the repo again with git clone --resursive https://github.com/ohnooj/computer-graphics-ray-casting.git, this should clone entire repo with an eigen folder under computer-graphics-ray-casting folder. I think it's normal that you can't open it on github, but you should be able to open the folder locally after it is cloned successfully.

[oneDotpy]

I don't know if you fixed it or not, but I had the same issue on Windows. For me I just manually downloaded Eigen from https://gitlab.com/libeigen/eigen/-/releases and put the eigen-3.4.0 inside A2/ext/ and it worked after that.