Anyone know of a set of reusable code that implements advanced geometry calculations?
I hate rewriting this stuff - especially considering my lack of math training.
Specifically (today) I’m looking for calculation of tetrahedron volume and surface area.
write it once… and save it to be re-used later
I think he mean re-invent the wheel, “rewriting” things that someone else has already worked out. 
I just found this in my back pocket.
Must have made sitting uncomfortable
That won’t work for an irregular tetrahedron, but thanks for the sample code!
If only you’d mentioned that the tetrahedron in question was irregular in your original post. Then I would have also included a link to some fiber pills.