Morning rambling:

I can tell that just from this "simple" exercise, I will be learning a lot.

The documentation really doesn't have any information right up front about the
valid input range for most of the functions, so I always have to go looking up
the range for acos, asin, etc.

I will likely wind up revisiting the catenary to do the code example for cosh -
because it would be a nice double-duty bit of code.

Did we "know" that torus {} had its own whole set of internal csg operations?
difference, intersection, merge and union      :O
http://wiki.povray.org/content/Reference:Torus

I'm sure I will come across another handful of keywords that I had no idea were
"special" or that even existed....

The file is now 1216 lines - with only the tiniest smattering of actual
examples....  It's mostly just the list of keywords.   It makes my head hurt to
imagine conceiving it all and implementing it in source code as a functional
raytracer...

But today I have erranding so not until much later, or ... tomorrow.  ;)

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