I’m currently developing 4 dimensional vectors in C#! Collaboration very welcome! The project can be found here. The project so far has two classes. There is aVector4 class which defines a 4D vector and a bunch of functions to work with them. There also is a Math class to handle complex functions. The code is compatible with Unity, but can also be completely independent of Unity thanks to my Math class. The project is licensed under the MIT license, so it is free for everyone to use, even in commercial use. Pull requests are also very welcome. Have a wonderful day and thank you for just looking at a project made by a nerd with a hobby.