pub use *;
pub use *;
pub use *;
pub use *;
use MeshType;
/// A directed or undirected edge or halfedge in a mesh.
///
/// More specifically:
/// - In an undirected graph, there is exactly one edge id for each undirected edge. Instances of the edge should can be different, i.e., `target` and `origin` can be swapped.
/// - In a directed graph, there is exactly one edge id for each directed edge. An undirected edge therefore is a pair of `Edge`s, each with their own id.
/// - In a halfedge mesh, there is exactly one edge id for each halfedge. An undirected edge therefore is a pair of `Edge`s, each with their own id.