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Thierry Geraud authored
Add classes for classical 2d neighborhood. * oln/core/neighborhood_entry.hh: New. * oln/core/abstract/neighborhood.hh: New. * oln/core/2d/neighb2d.hh: New. * oln/core/gen/neighb.hh: New. * oln/core/2d/aliases.hh (neighb2d): New. * oln/basics2d.hh: Update. git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@553 4aad255d-cdde-0310-9447-f3009e2ae8c0
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