The Geom library provides all the classes to manage euclidian 3D space problems. It contains classes such as GranOO3::Geom::Point, GranOO3::Geom::Vector, GranOO3::Geom::Frame and so on. Note that GranOO implements an easy way for making operation between different frames. This is a very smart and useful feature because, you can manage some computations in a local frame and "export" the results of these computations in other frame (such as the main global frame).