[BUG]: Facet-to-vertex and facet-to-edge connectivities in prism mesh are missing triangular facets

[schnellerhase]

Summarize the issue

The connectivities (2,0) (facet-to-vertex) and (2, 1) (facet-to-edge) are missing the triangular facets in a prism mesh.

How to reproduce the bug

Run the MWE below. For a more detailed description of the problem see here

Minimal Example (Python)

from dolfinx.mesh import create_box, CellType
from mpi4py import MPI

mesh = create_box(MPI.COMM_WORLD, [[0, 0, 0], [1, 1, 1]], [1, 1, 1], CellType.prism)

print("Connectivity (2, 0)")
mesh.topology.create_connectivity(2, 0)
f_to_v = mesh.topology.connectivity(2, 0)
for i in range(f_to_v.num_nodes):
    print(f_to_v.links(i))

print("\nConnectivity (2, 1)")
mesh.topology.create_connectivity(2, 1)
f_to_v = mesh.topology.connectivity(2, 1)
for i in range(f_to_v.num_nodes):
    print(f_to_v.links(i))

Output (Python)

Connectivity (2, 0)
[0 1 3 4]
[0 2 3 5]
[1 2 4 5]
[1 4 6 7]
[2 5 6 7]

Connectivity (2, 1)
[0 2 4 8]
[1 2 6 9]
[ 3  4  6 10]
[ 4  5 11 13]
[ 6  7 12 13]

especially we do not retrieve the front and back facets, in the case of the (2,0) connectivity, given by: [0, 1, 2], [1, 2, 6], [3, 4, 5] and [4, 5, 7]

Version

main branch

DOLFINx git commit

No response

Installation

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Additional information

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