# Appendix: naming rule to find elements in an hexahedron¶

## Definition of an hexahedron¶

Naming rule for the faces of an hexahedron

A: plane Z = 0

B: plane Z = 1

C: plane Y = 0

D: plane Y = 1

E: plane X = 0

F: plane X = 1

### Quadrangles in an hexahedron¶

Naming rule for the 6 quadrangles in an hexahedron

Q_A or 0: plane Z=0

Q_B or 1: plane Z=1

Q_C or 2: plane Y=0

Q_D or 3: plane Y=1

Q_E or 4: plane X=0

Q_F or 5: plane X=1

### Edges in an hexahedron¶

Naming rule for the 12 edges in an hexahedron

E_AC or 0: planes Z=0 and Y=0

E_AD or 1: planes Z=0 and Y=1

E_BC or 2: planes Z=1 and Y=0

E_BD or 3: planes Z=1 and Y=1

E_AE or 4: planes Z=0 and X=0

E_AF or 5: planes Z=0 and X=1

E_BE or 6: planes Z=1 and X=0

E_BF or 7: planes Z=1 and X=1

E_CE or 8: planes Y=0 and X=0

E_CF or 9: planes Y=0 and X=1

E_DE or 10: planes Y=1 and X=0

E_DF or 11: planes Y=1 and X=1

### Vertices in an hexahedron¶

Naming rule for the 8 vertices in an hexahedron

V_ACE or 0: planes Z=0 and Y=0 and X=0

V_ACF or 1: planes Z=0 and Y=0 and X=1

V_ADE or 2: planes Z=0 and Y=1 and X=0

V_ADF or 3: planes Z=0 and Y=1 and X=1

V_BCE or 4: planes Z=1 and Y=0 and X=0

V_BCF or 5: planes Z=1 and Y=0 and X=1

V_BDE or 6: planes Z=1 and Y=1 and X=0

V_BDF or 7: planes Z=1 and Y=1 and X=1