Among other things, Gilles Tran saw fit to write:


> raytracing, here's a link to an engraving describing this very, very early

> on the Art of Measurement).
>
http://www.columbia.edu/cu/lweb/eresources/exhibitions/treasures/html/55.html

Maybe I've missed something, but I've found this:
http://www.frontiernet.net/~eugene.ressler/
(see section 4.1 of the manual (page 28 in the pdf))

-- 
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby

Post a reply to this message