| Bit | Value | CNAT | Description |
|---|---|---|---|
| 0 | 1 | CNAT_Left | Direction: Left |
| 1 | 2 | CNAT_Right | Direction: Right |
| 2 | 4 | CNAT_Top | Direction: Up |
| 3 | 8 | CNAT_Bottom | Direction: Down |
| 4 | 16 | CNAT_Center | Direction: Center (not for attachment) |
| 5 | 32 | CNAT_MultiAttach | Special flag: new attachment behaviour for objects with the same direction value at several vertices. |
| 6 | 64 | CNAT_NoCollision | Extra flag: non-colliding vertex |