Icosahedron Subdivision Methods

[TaffGoch]

I haven't posted this PDF here before, assuming that anyone can find it as easily as I, on the internet. Upon reconsideration, perhaps others are not as obsessed as I...

"NASA CR-1734 - Polyhedral Subdivision Concepts - Joseph D. Clinton - 1971"

Clinton covers 7 icosahedron-subdivision methods in this paper, making no distinction between class-I & class-II.  Some of the 7 are class-I and the remainder are class-II. The paper may have been written before the "class" terminology came into common usage. 

(That's the primary reason I didn't want to introduce this paper into discussion. I don't want to "muddy the waters" with contradictory terminology, compared to those in Domebook2.)

Do not confuse these method names/numbers with those in common usage, today. (Perhaps, a cross-reference is in order?)

-Taff

[Dick Fischbeck]

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19710028059_1971028059.pdf

[And-Ray]

I myself puzzle out how to make the division sphere, Class 1 method 3, Triacon. Pictures show the sequence of the process.

Thanks for the references.

[1treePetrifiedForestLane]

reminds me of sailsurfing -- the surfer's valuation of pi (3.1 in bases 4 through ten) and

a pith (0.32 in at least one base .-)