Function gmsh_sys::gmshModelGetEntities

pub unsafe extern "C" fn gmshModelGetEntities(
    dimTags: *mut *mut c_int, 
    dimTags_n: *mut usize, 
    dim: c_int, 
    ierr: *mut c_int
)

Get all the entities in the current model. If dim is >= 0, return only the entities of the specified dimension (e.g. points if dim == 0). The entities are returned as a vector of (dim, tag) integer pairs.