Vadim Sytnikov wrote:

>   if(z>0)
>      sphere{0 1
>                  ^-------- (A)
>   else
>      box{-1 1
>            ^--------------(B)
>   end
>      rotate x* if ( vlength(<x,y,z> > 1 )  30 else (2+x+y+z) end
>    } <-------------------(C)

If you want something different from:

union {
 intersection {
   sphere { 0,1 }
   plane { -z,0}
   }
 intersection {
  box {-1,1}
  plane { z,0}
 }
 rotate ....
}

then you are doomed to work with mesh or rewrite the whole pov-engine.
Especially if you absolutlely want the non-linear transform from the second if.
Then you could make your own SDL, without preprocessor visible level if you wish.

-- 
Non Sine Numine
http://grimbert.cjb.net/
Puis, s'il advient d'un peu triompher, par hasard,

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