yade-users team mailing list archive

[Jan Stránský <question222795@xxxxxxxxxxxxxxxxxxxxx>]

Question #222795 on Yade changed:
https://answers.launchpad.net/yade/+question/222795

Jan Stránský posted a new comment:
Hi Bruno,
most likely I will need such approach also for facets (and it would be very
nice feature anyway), so probably I will spend some time on it :-) but not
imediatelly, I will let you know when I start (to prevent more people doing
the same job).
Thanks for the information
Jan


2013/2/25 Bruno Chareyre <question222795@xxxxxxxxxxxxxxxxxxxxx>

> Question #222795 on Yade changed:
> https://answers.launchpad.net/yade/+question/222795
>
> Bruno Chareyre posted a new comment:
> Contacts with edge and vertices are mutually exclusive, it is one or the
> other depending on the projected sphere's center.
> We have a paper under review which explains that in details. I can send
> you a draft version if you like, or you can also see the 2D version of it,
> which is very similar (*).
>
> One contact can in fact slide on this edges+vertices structure and go
> across different states without loosing the history:
> sphere-edge -> sphere-vertex -> sphere-edge -> etc.
>
> It means that for this specific contact id1 or id2 are changing in time.
> Programatically, it is achieved by copying the data of an existing
> interaction into a newly created interaction. It needs to carefully
> track contacts between spheres and grid elements.
>
> The same concepts of mutual exclusion and tracking over time should be
> applied to a network of facet+edge+vertices to solve the current
> problems with facets. It will also open up the possibility of dynamic
> surfaces(**) provided the implementation is robust.
>
> What do you have in mind? Would you spend time on this?
>
> (*) https://yade-dem.org/w/images/1/1b/Chareyre%26Villard2005_licensed.pdf
> (**) https://www.youtube.com/watch?v=YW5IsINjCvw
>
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