"And" <49341109@ntnu.edu.tw> wrote:
> Hi,
> I have a method using isosurface render spheroid shell below.
>
> use this two function
>
> #declare f_spheroid=function(var1,var2,var3, a,b){
> var1*var1/a/a+var2*var2/a/a+var3*var3/b/b-1
> }
>
> #declare f_spheroid_normalized=function(var1,var2,var3, a,b){
> f_spheroid(var1,var2,var3, a,b)
> /sqrt(4*(var1*var1+var2*var2)/pow(a,4)+4*var3*var3/pow(b,4))
> }
>
>
> //than difference these two isosurfaces
> difference{
> isosurface{
> function{f_spheroid(x,y,z,1,3)}
> }
> isosurface{
> function{f_spheroid_normalized(x,y,z,1,3)+thickness}
> }
> }

How do I add a "c" parameter to the ellipsoid, in addition to "a" and "b"? I can
see how to add "c" to "f_spheroid" function. But I don't understand what's going
on in "f_spheroid_normalized". Thanks.


Mike

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