New question #707788 on Yade:
https://answers.launchpad.net/yade/+question/707788

Hello dear YADE community,

I would like to determine the porosity locally in a delimited area in the 
experimental space on which my simulation is based. In principle, the command 
"voxelPorosity()" seems to be well suited for this purpose [1]. The application 
of the command itself works quite well. 
If I have understood the command correctly, the area to be analyzed with the 
given vertices is spanned by a cuboid, parallel to the coordinate axes [2]. 
However, I am afraid that my further requirements can thus not be completely 
fulfilled:
I want to sample a cylindrical experimental space locally with respect to 
porosity. This means for the porosity determination that I want to rotate this 
cuboid or here specifically as a cube around the z-coordinate. For this 
rotation I can for example specify a quaternion with, which the 
"voxelPorosity()".however does not pick up. How can I determine the porosity of 
a cube (filled with spherers) rotated around the z-axis?

I am looking forward to help and hope to find a solution to the problem,
with best wishes, Paul

[1] https://answers.launchpad.net/yade/+question/690057
[2] https://answers.launchpad.net/yade/+question/384899

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