6:48:04Colleen<shinmera> |3b|: it's not a diameter, because bsize is half-size.
6:49:42Colleen<shinmera> |3b|: As for the structure, I want to get an answer to the question "which groups of objects may be involved in a collision with each other?" which we can approximate with the question "what groups of objects are there where each object within a group is within a distance of at least one other object within the group"
7:48:10Colleen<|3b|> ok, so regular grid would be either 1 group per item, or 1 group containing all. i think i read original question differently from what you intended, which is why i was confused
7:48:49Colleen<shinmera> Yeah, sorry for not being clearer
7:49:04Colleen<|3b|> (not that i have any useful input either way :/ )