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[zhou qian <question683187@xxxxxxxxxxxxxxxxxxxxx>]

Question #683187 on Yade changed:
https://answers.launchpad.net/yade/+question/683187

zhou qian posted a new comment:
Hi Robert: 
I know my description may be unclear but I tried to provide more information.
I read the codes about polyhedron and found that my codes blocked in function Polyhedron Simplify(Polyhedron P,Real limit) in Polyhedra_support.cpp.
I want to know 
1.what is this function used for?

I also checked the errored interaction and its relative polyhedrons, and found that the 2 polyhedrons,
Poly1 init dofs:
Vector3(-4.229972e-11,0.05,-0.01572352)
Vector3(-0.008409783,0.03956479,-0.025)
Vector3(-0.006184036,0.03689339,-0.01840207)
Vector3(-0.01039558,0.04890738,-0.01572352)

Poly2 init dofs:
Vector3(-8.637007e-10,0.04044868,-0.025)
Vector3(-4.229972e-11,0.05,-0.01572352)
Vector3(0.00397562,0.04082184,-0.01813537)
Vector3(0.005226423,0.04972609,-0.025)

the 2 polys have a common point and in my simulation, they will have a
very very small intersection at this point after several steps.

I want to know 
2. If the intersection is very very small, will it got wrong? and why?

In fact, if I adjust the time step to a larger one, it does run
smoothly. I guess that's because the intersection is larger?

3.Will reducing SIMPLIFY_LIMIT work?
Yours,
Joe

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