Hi everybody, I digged a bit into the Gecode source about the randomized branching supported since version 3.
In line 124 in gecode/support/random.hpp I found the definition of RandomGenerator internally used in the view selection: http://www.gecode.org/doc-latest/reference/group__FuncSupport.html#g02fe942f90a57a25639f09960dab4459 As given there, it is just a typedef onto the LinearCongruentialGenerator provided by Gecode but I would like to set up my own random number generator... Is there a possibility to support user defined generators? e.g. in coming versions? If not available right now, maybe you like the following suggestion: A possibility would be a super class 'RNG' that has to be implemented by every generator plus a kind of factory class 'RNF' with static members only. The RNF would be a wrapper around the current RNG instance to use (stored in a static internal member). Thus, all Gecode internals that need a random number use a static interface of RNF instead of some RNG instance members. So the library gets independent of the concrete RNG used and you get the possibility to register a user defined RNG within the RNF. Per default the RNF can use the linear congruential generator provided. The static interface and data member would avoid annoying copies of RNGs all around and won't complicate your Gecode internals/source. Just a suggestion... if it is already possible just ignore and please let me know how to do with the current Gecode version. :) Have a nice weekend, Martin _______________________________________________ Gecode users mailing list us...@gecode.org https://www.gecode.org/mailman/listinfo/gecode-users
