I suggest you to use Spatch, or Hamapath. they are freeware that enable you
to create bicubic patch very easily. I dont remember where you can download
the program, but I think I could find an archive on my HD.

Chaps.

"Rafal 'Raf256' Maj" <raf### [at] raf256com> wrote in message
news:Xns### [at] 204213191226...
> Hello,
> i'm planing to make little un-typical "gift" for someone :P one of it's
> elements would be an rose. Any suggestions how to make it ?
>
> Currently i'm planing :
>
> spheres-sweep as main part, thene cones (or some more comples shapes)
> putted along main part as spikes.
> Biggest proelm is with top of flower, maybe isosurface ? Any suggestions
> what formula(s) will be usefull ?
>
> --
> #macro
g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
> pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local
l=mod(c,100
> );g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end
light_source{
> y 2}sphere{z*20
9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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