"Tor Olav Kristensen" <tor### [at] TOBEREMOVEDgmailcom> wrote:
> "LanuHum" <Lan### [at] yandexru> wrote:
> > Warp <war### [at] tagpovrayorg> wrote:
> > > LanuHum <Lan### [at] yandexru> wrote:
> > > > Hellow!
> > > > Whether it is possible to make on points of a curve function for a isosurface?
> > >
> > > I'm not exactly sure what you are asking, so could you please rephrase
> > > the question?
> > >
> > > --
> > >
> >
> >                                                           - Warp
> > isosurface{ // sphere
> >  function{ sqrt(x*x + y*y + z*z) - 1 }
> >
> > isosurface{ // cylinder
> >   function {  sqrt(x*x + z*z) - 1 }
> >
> > isosurface{ // my spline-based object (Object on the basis of a spline)
> >   function {  ????????? } //User-Defined Function. How?
>
> Something like this ?
>
> From: R  Suzuki
> Subject: Example of Rope Macro
> Date: 22 Jan 2002 09:52:27
>
http://news.povray.org/povray.binaries.images/thread/%3C3c4d365b%40news.povray.org%3E/
>
> From: R  Suzuki
> Subject: Rope Macro
> Date: 22 Jan 2002 09:49:44
>
http://news.povray.org/povray.binaries.scene-files/thread/%3C3c4d35b8%40news.povray.org%3E/
>
> --
> Tor Olav
> http://subcube.com

No!
I would like to have function that it was possible to use such way:

For example:
isosurface{ //-------------------------
  function{ user-defined function(bla-bla-bla)
            -f_leopard(x*11,y*11,z*11)*0.25
   }

or:
#declare fn_A = function { FIRST user-defined function (bla-bla-bla)}
#declare fn_B = function { SECOND user-defined function (bla-bla-bla)}
#declare Blob_Threshold=0.125;
isosurface{ //-------------------------
  function {
      (1+Blob_Threshold)
      -pow(Blob_Threshold,fn_A(x,y,z))
      -pow(Blob_Threshold,fn_B(x,y,z))}

Probably, it is impossible?  :(

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