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On Thu, 27 Dec 2001 05:09:12 +0100, Tor Olav Kristensen <tor### [at] hotmail com>
wrote:
> Jide:
> Yes I think Escher made such a thingy, but I
> don't remember how his drawing looked like.
> The iso-surface I'm "constructing" is similar to the
> shape Ib Rasmussen showed in this thread;
> "Re: Challenge Time" to this news group 8. Dec. 2001:
the link to escher's image is in Ib's post
ABX
--
#declare _=function(a,b,x){((a^2)+(b^2))^.5-x}#default {pigment{color rgb 1}}
union{plane{y,-3}plane{-x,-3}finish{reflection 1 ambient 0}}isosurface{ //ABX
function{_(x-2,y,1)&_((x+y)*.7,z,.1)&_((x+y+2)*.7,z,.1)&_(x/2+y*.8+1.5,z,.1)}
contained_by{box{<0,-3,-.1>,<3,0,.1>}}translate z*15finish{ambient 1}}//POV35
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