Difference between revisions of "ADF symmetry options"
(→Square prism) |
(→Square prism) |
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| Line 11: | Line 11: | ||
! Equivalent surfaces | ! Equivalent surfaces | ||
! Equivalent corners | ! Equivalent corners | ||
| + | ! Equivalent sign moments | ||
| + | ! Zero sign moments | ||
! Symmetry axis | ! Symmetry axis | ||
|- | |- | ||
| <tt>0, NO, NONE</tt> | | <tt>0, NO, NONE</tt> | ||
| + | | - | ||
| + | | - | ||
| - | | - | ||
| - | | - | ||
| Line 22: | Line 26: | ||
| NW-NE-SE-SW | | NW-NE-SE-SW | ||
| - | | - | ||
| + | | - | ||
| + | | N, W, S, E | ||
|- | |- | ||
| <tt>2, NS, SN</tt> | | <tt>2, NS, SN</tt> | ||
| N-S | | N-S | ||
| NW-SW, NE-SE | | NW-SW, NE-SE | ||
| + | | N-S | ||
| + | | W, E | ||
| from side E to side W | | from side E to side W | ||
|- | |- | ||
| Line 31: | Line 39: | ||
| N-E, S-W | | N-E, S-W | ||
| SE-NW | | SE-NW | ||
| + | | N-E, S-W | ||
| + | | - | ||
| from corner NE to corner SW | | from corner NE to corner SW | ||
|- | |- | ||
| Line 36: | Line 46: | ||
| E-W | | E-W | ||
| SW-SE, NW-NE | | SW-SE, NW-NE | ||
| + | | E-W | ||
| + | | N, S | ||
| from side N to side S | | from side N to side S | ||
|- | |- | ||
| Line 41: | Line 53: | ||
| N-W, S-E | | N-W, S-E | ||
| NE-SW | | NE-SW | ||
| + | | N-W, S-E | ||
| + | | - | ||
| from corner NW to SE | | from corner NW to SE | ||
|- | |- | ||
Revision as of 16:05, 16 September 2020
Square prism
Notes:
- Faces and corners are referred to using compass directions, with north oriented in the direction of positive y-axis.
- Options 2-5 can be understood as mirror symmetries.
- Symmetry options of sign moments were added in version 2.1.32.
| Symmetry option | Equivalent surfaces | Equivalent corners | Equivalent sign moments | Zero sign moments | Symmetry axis |
|---|---|---|---|---|---|
| 0, NO, NONE | - | - | - | - | - |
| 1, ALL | W-S-E-N | NW-NE-SE-SW | - | - | N, W, S, E |
| 2, NS, SN | N-S | NW-SW, NE-SE | N-S | W, E | from side E to side W |
| 3, NESW, SWNE | N-E, S-W | SE-NW | N-E, S-W | - | from corner NE to corner SW |
| 4, EW, WE | E-W | SW-SE, NW-NE | E-W | N, S | from side N to side S |
| 5, NWSE, SWNE | N-W, S-E | NE-SW | N-W, S-E | - | from corner NW to SE |
Hexagonal prisms
Notes:
- The face and corner directions are listed in Assembly discontinuity factors.
- The corner symmetries have been wrong prior to version 2.1.32. The list below corresponds to the correct values used since version 2.1.32.
- Symmetry options 8 and 9 were added in version 2.1.32.
| Symmetry option | Equivalent surfaces | Equivalent corners | Symmetry axis | Note |
|---|---|---|---|---|
| 0, NO, NONE | - | - | - | |
| 1, ALL, 30 | 1-2-3-4-5-6 | 1-2-3-4-5-6 | - | useful for 30 degree periodic symmetric hexagonal lattices |
| 2 | 2-6, 3-5 | 1-4, 2-3, 5-6 | from side 1 to side 4 | |
| 3 | 1-2, 3-6, 4-5 | 1-3, 4-6 | from corner 2 to corner 5 | |
| 4 | 1-3, 4-6 | 1-2, 3-6, 4-5 | from side 2 to side 5 | |
| 5 | 1-4, 2-3, 5-6 | 2-6, 3-5 | from corner 1 to corner 4 | |
| 6 | 2-4, 1-5 | 1-6, 2-5, 3-4 | from side 3 to side 6 | |
| 7 | 1-6, 2-5, 3-4 | 1-5, 2-4 | from corner 3 to corner 6 | |
| 8, 60 | 1-2-3-4-5-6 | 1-3-5, 2-4-6 | - | useful for 60 degree periodic symmetric hexagonal lattices |
| 9, 120 | 1-3-5, 2-4-6 | 1-3-5, 2-4-6 | - | useful for 120 degree periodic symmetric hexagonal lattices |
