"Ross" <rli### [at] everestkcnet> wrote:
> "Dave!" <orr### [at] no_spam_pleaseexcitecom> wrote in message
> news:web.41656793cf25c4f0f0000e6e0@news.povray.org...
> > #declare elusiveobject = union {
> >         box {<-40,24,0>,<40,-24,20>
> >                 pigment {Red}}
> >         cylinder {<-40,0,0>,<80,0,0>,1 open
> >                 scale  <1,60,50>
> >                 translate <0,24,30>
> >                 clipped_by { plane { x 0
> >                 rotate <0,0,-17.785>
> >                 translate <40,24,0>}}
> >                 clipped_by { plane { -x 0
> >                 rotate <0,0,17.785>
> >                 translate <-40,24,0>}}
> >                 clipped_by {box {<-40,24,-20>,<40,-24,0>}}
> >                 pigment {Blue}}
> >         union {
> >                 disc {<40,0,0>,<1,0,0>,1}
> >                 disc {<-40,0,0>,<1,0,0>,1}
> >                         scale <1,40,50>
> >                         translate <0,24,30>
> >                         clipped_by {box {<-40.1,24,-20.1>,<40.1,-24,0>}}
> >                         pigment {Yellow}}
> >               }
> >
> > Forgive me if the code isn't as elegant as it could be!
> > I'm trying to create a smooth, curved surface linking the top edge of the
> > Yellow disc to the near edge of the Blue cylinder.  I can almost get it,
> > but not quite.  The shape I'm looking for seems to be a cylinder with
> > different scaling of the two endcaps, but I can't figure out how to do
> > that.
> >
> > Can someone propose a way to achieve what I'm aiming for here?  If
> possible,
> > I'd prefer to do it with basic shapes rather than patches or splines, but
> > I'll be grateful for any suggestions.
> >
> > If the answer is ridiculously simple, please be gentle!
> >
> > Thanks in advance for any help!
> >
> > Dave!
> >
> >
> >
>
> your subject has it almost. you use a cone with a different radus for each
> end:
>
> cone {
>  <0, 0, 0>, 0.25
>  <0, 1, 0>, 0.75
> }
>
> or something to that effect if I understand your intentions. for more info
> about cones, see 3.3.1.3 in the docs.

Hi Ross!
   Thanks for the input, but I think I wasn't clear in my request (it
appears that I deleted the introductory text before the code, go figure).

What I actually want to do is something like this:

cone {
<0,0,0>, 1 scale <1,1,1.5>
<0,1,0>, 1 scale <1,1,2.5>
}

I know that this isn't proper syntax, but I hope it illustrates what I'm
after.  The endcaps each have a different radius, but the scaling for the
two endcaps is different.  Can this be done?

Thanks again.

Dave!

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