;12 point cell using beams and triangles.

;Inner ring of 3, outer ring of 9...lends itself to 120 degree symmetry 

;for final three collimation bolts.

;Similar performance to the 12 point cell using 4 inner and 

;8 outer supports.

; http://elib.cs.berkeley.edu/~jonah/krajci12/

var r0  0.325053

var r1  0.731122

var r2  0.710637

var a1  21.931

var p1  90 + a1

var m1  90 - a1

diameter 254

thickness 25.4

f-ratio 6

n-mesh-rings 20

rel-support-radii r0 r1 r1 r2

num-support 3 3 3 3

support-angle 90 p1 m1 30

basis-ring-size 3

basis-ring-min 0

optimize r0 0.01

optimize r1 0.01

optimize r2 0.01

optimize a1 0.1

part triangle 3 point 0 0 point 1 0 point 2 0

part bar 3 point 3 0 part 0 0