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Re: [Question #263072]: Manipulating blocks created using jointedCohesiveFrictionalPM

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From: Jérôme Duriez <question263072@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 04 Mar 2015 17:01:45 -0000
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Question #263072 on Yade changed:
https://answers.launchpad.net/yade/+question/263072

    Status: Open => Answered

Jérôme Duriez proposed the following answer:
Hello Veljko,

The example script examples/jointedCohesiveFrictionalPM/testingJoint.py
may be related to your question, though in a much simplified manner.
This script is a model of two blocks separated by one rock joint.

Each block includes obviously a lot of particles that are clumped together, turning both blocks into rigid bodies. Here, the spheres are identified as belonging to one or another block directly from their position... If zSphere > zJoint then sphere belongs to block 1 else sphere belongs to block 2...
Unfortunately there is no general method that comes to my mind to identify subblocks in a general manner. You would have to work on the DFN surfaces to investigate what closed volumes they define, I guess. I never did it..

Your 2d question seems to me deeply related to the 1st one. In order to
transform subblocks into clumps, you need first to identify what spheres
belong to which subblock...

Jerome

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