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Re: [Question #267761]: Probable mistake: Data update using function updateElements in yade.utils

 

Hello,

The class UnstructuredGrid was implemented by me some 2 years ago as an
experimental version. The behavior you described was used on purpose, as it
was very simple and worked at that time (at least if I remember correctly).

I will have a look on the code and let you know if/what I will modify it.

cheers
Jan


2015-06-05 2:38 GMT+02:00 MikeZhao <question267761@xxxxxxxxxxxxxxxxxxxxx>:

> New question #267761 on Yade:
> https://answers.launchpad.net/yade/+question/267761
>
> I am working on renewing coordinates of Facet using function
> :setPositionsOfNodes and updateElements in yade.utils module and I have
> found out that there's something wrong with these functions.
>
> The position of Facet is illustrated with a reference position and a local
> coordinate, as is defined in the yade.utils module. The reference position
> is the inscribed Circle Center of the global coordinates of the vertices of
> the facet. But the position update process provided by the function
> updateElements simply changes the reference position of a facet to [0,0,0]
> and changes the coordinates to the recent coordinates, using global system
> instead of local system.
>
> If positions are updated this way, it can not be detected in contact
> searching process.
>
>
>
>
>
>
>
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