Why it doesn't work?

===================================
#include "functions.inc"
#include "colors.inc"

camera {
  location  <7, 25, -20>
  look_at   <5, 3.0,  0.0> }

light_source { <-100,200,-100> colour rgb 1 }
background { White }

isosurface {
function {  f_helix1 (1, 1, 1, 2, 3, 4, 5, 0.1, 1, 25) }
        max_gradient 1.5
        contained_by {sphere {0, 1.2} }
        pigment {rgb .9}
}
==================================

Regards,
Oleguer

Post a reply to this message