This is a library that deals with lines in 2D and 3D space. The library is implemented for a couple of independent 2d/3d packages:nalgebra,cgmath,vecmath and mint. Those implementations are feature gated so you only need to import the package you really use. Unfortunately this means the rustdoc is also feature gated, and as a default none of the implementations are part of the documentation. I'm trying to find a solution to this.