Question #692998 on Yade changed:
https://answers.launchpad.net/yade/+question/692998
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
> the principal axis of clump
What is "the principal axis"? principle axes of inertia?
What is "clump"? clump of spheres? intersecting or not? clump of non-spherical
particles?
the implementation is in core/Clump.*pp files [1,2].
The geometric properties (center of mass, inertia and orientation) is computed
in Clump::updateProperties.
There are two main approaches:
- using approximate "voxelization" for the case of intersecting bodies
- using standard analytical formulas for non-intersecting case
cheers
Jan
[1] https://gitlab.com/yade-dev/trunk/-/blob/master/core/Clump.hpp
[2] https://gitlab.com/yade-dev/trunk/-/blob/master/core/Clump.cpp
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