"Warp" <war### [at] tagpovrayorg> wrote:
>   That's the so-called "marching cubes algorithm".
>   I think it's patented in some countries where patenting these kind of
> things is possible.
>
>   AFAIK the marching triangles algorithm gives a better result and is free
> everywhere.


probably not very long anymore ... if the "right" people read this, they will
in the
former countries, where it is possible to patent these kind of things, patent
it ...

how can we prevent this ?

--
#macro J(N A)#local a=mod(N 3);#local W=<int(mod(A,4)*2)int(-A/4)9>*2;#if
(!mod(a 2))sphere{W,2,2pigment{color rgb<a*5A/2W.x/A*5>}}#if(a<1)sphere{W
+<2,0>2 2pigment{color rgb<a*10A 10>}}#end#end#if(N>3)J(int(N/3)A+1)#end#
end blob{J(29229171 0)threshold 1translate<-6 3>}/******Jan Walzer******/

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