mpb : how to duplicate a geometry object

Julien Arlandis <[email protected]>
Newsgroups gmane.comp.science.photonic-bands
Message-ID <[email protected]> 
Hello,


With (set! geometry (list (make cylinder
                        (center 0 0 0) (radius 0.2) (height infinity)
                        (material (make dielectric (epsilon 2))))))
how can I duplicate this structure using
(geometric-object-duplicates shift-vector min-multiple max-multiple 
obj)? What is obj exactly?
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