Filip Wänström framkant
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| """ | |
| a demo of how to convert from cubic to BCC lattice, analog to the tetrahedral | |
| or FCC lattice, but without the headache of having to manage an interlaced grid | |
| structure as with the usual approach, at the expense of a diagonally skewed | |
| non-cubic bounding box in cartesian coordinates. | |
| an integer conversion from bcc to cartesian coordinates is as easy as | |
| x = -tx+ty+tz |