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An oval using the torus is not going to turn out right unless you use
Kens second method. Uneven scaling is one thing, procedural-type
scaling is another, of which POV-Ray is unable to do. Another
possibility is to string together spheres or blob components along a
spline path, just not as efficient.
Bob
Ken <tyl### [at] pacbell net> wrote in message
news:37CC0E78.352544AD@pacbell.net...
>
>
> Kenny Pyatt wrote:
> >
> > This question maybe a simple one to the experts but I can't seem
to make
> > a simple oval. I can make a chain link by taking the difference
of a
> > torus and adding cylinders, I can make a torus. But I can't
figure out
> > the way I am supposed to strech the torus into an oval. Please
tell
> > me. I am sure it is simple.
> >
> > --
> > Kenny Pyatt
>
> Uneven scaling is one way to do this. If for example you were
looking
> through the hole of a torus in front of the camera scale it:
>
> scale<1, 1.5, 1>
>
> Or try something like this for one link:
>
> camera { location 6*-z look_at 0}
> light_source { 6*-z rgb 1}
>
>
> #declare Torus_Part =
> intersection {
> torus{1,.25 rotate 90*-x}
> plane{y,0}
> }
>
> #declare Link =
> union{
> object{Torus_Part translate y*-.5}
> object{Torus_Part rotate 180*x translate y*.5}
> cylinder{y*-.5, y*.5, 0.25 translate x*-1}
> cylinder{y*-.5, y*.5, 0.25 translate x* 1}
> pigment{rgb 1}}
>
> object { Link }
>
> --
> Ken Tyler
>
> See my 850+ Povray and 3D Rendering and Raytracing Links at:
> http://home.pacbell.net/tylereng/index.html
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