Dear sir:
I want to know if the MMG’s Tet cell has some specific node ordering?
Regards
Hello,
The nodes of tetrahedra cells are ordered in the forward direction. I copy a post with more informations about the Mmg numbering.
Tetra numbering in Mmg
-
edges are numbered in the order of their extremities indices:
- edge 0 is the edge with vertices 0 - 1
- edge 1 is the edge with vertices 0 - 2
- edge 2 is the edge with vertices 0 - 3
- edge 3 is the edge with vertices 1 - 2
- edge 4 is the edge with vertices 1 - 3
- edge 5 is the edge with vertices 2 - 3
-
A face is numbered with the index of its opposite vertex:
- face 0 is the face 1 - 2 - 3
- face 1 is the face 0 - 3 - 2
- face 2 is the face 0 - 1 - 3
- face 3 is the face 0 - 2 - 1
Illustration
numbering convention
Regards
Algiane