Allowed rotation modes for an item, mirroring BoxPacker's Rotation enum.
:never— the item is packed exactly as supplied (1 permutation):keep_flat— the item may rotate in the horizontal plane only (2 permutations):best_fit— the item may take any of its 6 orthogonal orientations
Summary
Functions
Number of orientation permutations allowed (matches BoxPacker's enum integer values: 1/2/6).