Suppose sphere and facet in contact, where the facet rotates along axis
parallel to the contact normal, so that the contact circumscribes a
circle around the facet's rotation center -- will that work?
Yes, of course. Why not?
So, I revert and resume working with ScGeom as usual?
Yes, please -- unless you finally say what is the benefit of that
change.
There must have been a misunderstanding at a point. I thought merging
ScGeom and Dem3Dof was clearly an objective for all of us. Anton asked
for that once again a few days ago. We discussed that in many mails, and
for hours in Prague. That is why I didn't elaborate the reason for
merging nor discussed it in mails before commit, I thought the point was
clear. I also saw that GenericSphereContact was planned for removal at
a point : how would it be removed without merging classes?
Do you remember this discussion on precomputing different things in a
unique geometry class, based on flag saying if the functors are
incremental or total? You said it would be like emulating inheritance,
very true, so I thought using inheritance was smarter than emulating it.
In my vision, ScGeom would precompute displacement for incremental laws
in contact point paradigm, while Dem3Dof would precompute total strains
in continuum-discrete paradigm (not fully consistent, since we have in
fact 4 possible combinations with point/continuum vs. incremental/total,
but only two combinations are in Yade atm).
Actually, I will not try to proove a real need for merging. I did it
only because I felt it was high in the list of TODOs and I was the
assignee (like e.g., don't ask me to explain why there is a need to
change signs, and why me the assignee). From a productivity point of
view, having two different families of geometry classes and functors in
the code is really not a problem. I'll be happy with the previous situation.
I need to revert carefully : the same commit contains independant
improvments and cleanings in ScGeom (bad mistake). I'll see if I can do
it today, it will be soon anyway.
Bruno
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