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On Thu, 16 Sep 1999 09:59:38 -0400, Buckaroo Bill wrote:
>
>Ron Parker <par### [at] fwi com> wrote :
>>
>> Even there, it's of limited usefulness if it has a fixed major radius.
>>
>
> Maybe I don't know what you mean. I was just thinking that I would be
>happy with a major radius of 1 and a minor radius of 1. Everything else can
>be done with density and scale. As long as the density starts at 1 along the
>focus of the minor radius and goes to 0 and stays there.
The problem is that if I want a toroidal density pattern with a major radius
of 1 and a minor radius of .1, I have to scale the pattern by 100 and then
put my entire color map into the range [0 .. 0.001] That doesn't scale very
well.
> Isosurface torus pretty much requires a toroidal container which means
>that you cannot combine it with another media in the same container.
Really? Are you sure?
//------------ cut here --------->8=========
#declare myfun=function{max(0,1-sqrt( y*y + sqr(sqrt(x*x+z*z)-5)))}
sphere { 0,6.1 hollow
interior { media {
density {function {myfun}}
emission .2 intervals 10 samples 5 5
}}
texture {pigment {color rgbt 1}}
}
light_source {<-20,20,-20> rgb 1}
camera {location <0,5,-10> look_at 0}
//------------ cut here --------->8=========
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