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So this is great
.. but it's also not super useful.
For a single rigid body, it's easy enough to copy those to the clipboard, paste, and write a simple parser to import them for simulation.. but I can't imagine many people will actually do that.
For a complex system with more than a couple components and joints, it would be a lot of error-prone busy work to go through each component, re-copy, and re-import all of those, and someone would have to describe the joints / other constraints.
We don't use it but for many in robotics, it might be useful to build something like a Gazebo http://gazebosim.org exporter that includes the geometry, moments, and joints.
What would be great and useful for everyone, though, would be to create a local center of mass origin / basis for each body / component.
This would put a center point at the center of mass [one that's automatically updated for each body / component in an assembly hierarchy], and the axes would be oriented to match the principle axes ( https://en.wikipedia.org/wiki/Moment_of_inertia#Principal_axes ).
With that, even someone who doesn't understand the underlying physics could easily design interesting geometries that could be spun like tops https://www.disneyresearch.com/project/spin-it/ or to optimize placement of joints for perfectly balanced moving structures (like a 9-ton gate that you could move with one finger https://www.youtube.com/watch?v=NvAyjqdwNV8 or something more practical)
If it's done in a workable way, I'd gladly put together a short tutorial to show people how to use it to do either or both of the above as a small payment and show of appreciation.
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