Question #240275 on Yade changed: https://answers.launchpad.net/yade/+question/240275
Bruno Chareyre proposed the following answer: >if explained by yade code, it is like >O.bodies[1].groupMask=[1,2] Jerome's suggestion is: > O.bodies[1].groupMask=3 Which is indeed the correct translation of [1,2] (Algodoo) into a bitmask (Yade). It seems to me that any combination that you can define in the Algodoo way can similarly be reproduced with bitmasks. Note that there is no absolute need to use avoidSelfInteractionMask if you stick to four particles only. This should be ok: mask0 = 11 (0 interacts with 1 and 3 => 1+2+8=11) mask1 = 7 (1 interacts with 0 and 2 => 2+1+4=7) mask2 = 14 (etc.) mask3 = 13 Since this technique can be painfull to generalize to N particles, the purpose of avoidSelfInteractionMask was to make some logical operations easier in the general case. -- You received this question notification because you are a member of yade-users, which is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
