Hi all,

Apologies if this is not the best places to ask this question ( I'm only
subscribed to .general and .binaries.images at the moment ).

I've just downloaded the latest superpatch ( thanks Ron ), and have a couple
of questions, mostly relating to the isosurface function.

Firstly, I modified Gilles Tran's Egg scene as follows. I wanted to use
splines to change a couple of the values, but I always get an error. After
this, I have to restart POV as it will not render any other isosurface.
I initially tried using Colefax's AutoClck.mcr to change the same values,
but that didn't work either. Is there a problem with using declared
variables within an isosurface function? I *really* want to be able to
animate isosurfaces.

Also, where can I get more information on how they work, or more
specifically to explain the mathematic gibberish that resides inside the
function statement :-) ?

#declare pos1=spline {
                 linear_spline
                 0, 0.04
                 1, 0.4
          }

#declare pos2=spline {
                 linear_spline
                 0, 0.04
                 0.5, 0.4
                 1, 0.04
          }

#declare Egg=isosurface {
     function{ sqrt(x*x +y*y*0.5 +z*z) -5 + noise3d(x*1,y*1,z*1)*pos1 +
noise3d(x*6,y*6,z*6)* pos2 -0.125}
     bounded_by{ box {-7,7}}
     eval
     threshold  0
     method 2
     scale 1
}

Secondly, I can't work out how to access the inbuilt isosurface functions
 that the doc says are in there ), like sphere, superellipsoid etc. Can
anyone help?

Thanks in advance for your suggestions.

Andy Cocker

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