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Contact detection



just a quick question on the contact detection method used by Yade 
code. Well, looking at the sweep and prune algorithm actually I see that it 
sorts the min and max coordinates of the bb. My question is: Why do we need to 
extend the sorting to all the bb and not just for instance to bb close to each 
others? Is this contact detection method more efficient in terms of search time 
than other methods based on spatial subdivisions?

Thanks a lot,


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