[petsc-users] About the face orientation.

[neil liu]

Dear Petsc developers,
I am checking the face orientations for DMPLEX.
I found the following rule,
edge ordering for face 0   Orientation
0 1 2                  0
1 0 2                -1
2 1 0                -2
0 2 1                -3

How about -4 or -5? I am a trying a simple mesh, therefore didn't show any
face with orientation -4 or  -5.

Does this also apply for all other faces, right? E.g., face 1,
edge ordering for face 1 Orientation
3 4 0                             0
4 3 0                            -1
.....

Thanks,

Xiaodong
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