Hi Jerome,
if I am reading the code right (yes, it is mine; "bzr qblame") , it will
return the summary force using the same "convention" as is used for
NormShearPhys::{normal,shear}Force; it does not care what is tension or
compression. The (dot1<0.?1.:-1.) only determines the sense from id1 to
id2 based on the normal, and normal is always from id1 to id2.
Cheers, Václav
Hello,
I'm considering the code in py/_utils.cpp for the function
forcesOnPlane, and i have few questions :
- I'm guessing that there is an hidden convention of sign below the
orientation of the returned vector. Does this returned sum of forces
correspond to forces acting from one side of the plane to the other
(one "block" to the other) ?
If yes (as I assume it), from which block to which one ? (with respect
to the normal defined in the call of the function ?)
- And, if still yes to the first question, I imagine that it depends
on the convention assumed by the author of this code for
NormShearPhys->normalForce and NormShearPhys->shearForce : are these
vectors considered from body 1 to body 2 or the contrary ? I'm aware
of https://bugs.launchpad.net/yade/+bug/493102, but I think that the
guy who wrote this made a choice (Vaclav ?)
Thanks,
Jerome
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