tbillington

fn linked_face(vertexes: &[Rc<RefCell<Vertex>>], face: UnlinkedFace) -> Option<RefCell<Face>> {
    Some(RefCell::new(Face {
        a: match vertexes.get(face.a) {
            Some(x) => x.clone(),
            None => return None
        },
        b: match vertexes.get(face.b) {
            Some(x) => x.clone(),
            None => return None
        },