yade-dev team mailing list archive

[Chiara Modenese <c.modenese@xxxxxxxxx>]

Hi Guys,

small question. I was trying to plot normal force versus overlapping of all
my interactions. For the normal force I want to keep the sign and so I
simply project it onto the corresponding normal vector something like:
Fn=i.phys.normalForce.dot(i.geom.normal). The problem is that, without
adhesion and according to a certain convention, I expect forces all of the
same sign whereas I sometimes record opposite ones. A problem in my script
or why does that happen?

Thanks, Chiara