pub fn is_shell_closed(model: &Model, shell: &Shape) -> OgeomResult<bool>Expand description
Whether every edge in a shell is shared by exactly two faces.
The defining property of a closed shell, and the one that decides whether it can bound a solid. An edge used once is a free boundary: the shell has a hole. An edge used three or more times is non-manifold, which is legitimate topology but not something that encloses a volume.