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for as far as i know your methode of creating a tube is the only (usefull)
one. You could even make a macro for it :-).
//start of macro
#macro Tube (Lenght, Inner_Diam, Outer_Diam)
difference{
cylinder{<0,0,0>, <Lenght, 0,0>, Outer_Diam}
cylinder{<-1,0,0>, <Lenght+1, 0,0>, Inner_Diam}
}
#end
//end of macro
object{Tube(1, 2, 3) pigment {Red}} //shows a tube with lenght 1,
Inner_Diam 2, Outer_Diam 3 (and a red color)
"Tabea" <hio### [at] web de> wrote in message
news:web.3ea6463e139c24052b26ab750@news.povray.org...
> Hi,
>
> except of a difference between two cylinders?
>
> things that are allready exist.
>
> Tabea
>
> P.S. I love povray its hard to learn yes but why should i buy a prog for
> 2000? or more? Hope sometimes i make some nice pics.
>
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