bart wrote:
> dave vanhorn wrote:
>> Has anyone done one of these, either by CSG or isosurface?  I've been 
>> playing with stretched rings, but they just don't look right.
>>
> 
> The simplest CSG would probably be for example, a union of spheres
> along the shape. The shape of infty symbol
> is the lemniscate - see e.g.
> http://mathworld.wolfram.com/Lemniscate.html
> there you can find the parametric equations for it.

...or you can even try to slice a toric section of a torus...

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