Hi Vaclac, Have you think about vector<bool> for this purpose? As you certainly know it's a specialized template that hold bits (instead of bools). In fact, I have not seen the code, but in the c++ point of view, something like :
std::vector<bool> blockedDOFs; blockedDOFs.reserve(3); // Actually, I don't remember... but something like that blockedDOFs[0] = true; blockedDOFs[1] = false; blockedDOFs[2] = true; will take the same place in memory and should maybe be easy to use. Vincent Le 28 janv. 2010 à 08:38, Václav Šmilauer a écrit : >> However, it seems that, doing so, I can only manage 1 DOF as >> blockedDOFs is a bitmask which can be chosen between these values: > Well, read http://en.wikipedia.org/wiki/Bitmask and > http://en.wikipedia.org/wiki/Bitwise_operation. Precisely because it is > a bitmask, you have to set bits that correspond to RX, RY, RZ if you > need to block just those, i.e. (8 & 16 & 32), which is binary 0b111000 > (in python) and that is decimal 56. > > In yade moreover, try writing State.blockedDOFs? and enter, which will > give you > https://www.yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.State.blockedDOFs > and that reveals a simpler way that I put back then just for people that > don't want to know what bitmask is, and that lest you say > > state.blockedDOFs=['rx','ry','rz] > > as well, which is the same as > > state.blockedDOFs=56 > > which is the same as > > state.blockedDOFs=(8 & 16 & 32) > > which is the same as > > state.blockedDOFs=0b111000 > > Prefer the 'rx','ry','rz' way, though, since those numbers are > implementation detail and would break your code if that changed. It > makes also the code more readable, obviously. > > Cheers, Vaclav > > > > > _______________________________________________ > Mailing list: https://launchpad.net/~yade-dev > Post to : [email protected] > Unsubscribe : https://launchpad.net/~yade-dev > More help : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~yade-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-dev More help : https://help.launchpad.net/ListHelp
