> I try to use clumps for sometimes and it seems to me that there is a > small "bug" (maybe I'm wrong...). > When clumps are used, they are part of the bodyContainer (like common > bodies). But when interaction forces are computed, it seems that the > resulting moment is computed at the body center and not at clump > centroid. > I repeat that I may be wrong but in the "contact law engines" I read : [...] > addTorque(id1,-c1x.Cross(f), rootBody);
See NewtonsDampedLaw.cpp:61-73 for explanation. Yes, forces are first put to the bodies, but then recomputed then WRT clump center. > PS: I've got a python example where one can see strange behavior of > clumps. I can send it to anyone if necessary. Please do send the script! (I am still not quite confident about clumps in this respect, but I was also suspecting that InteratingSphere2InteractionBox4SpheresContactGeometry is broken somehow for shear... Not sure, we will see). Regards, 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
