// RONDO / Rondo01 '02.09
// By Tsutomu HIGO  E-mail: nj2t-hg@asahi-net.or.jp

#version 3.5;
global_settings {
  max_trace_level 3
  assumed_gamma 2.2
  }

#include "functions.inc"

union{
  #declare I=0; #while (I<36)
    isosurface {
      function {
        (x-0.2*sin(5*pow(y,0.6)))*(x-0.2*sin(5*pow(y,0.6)))+z*z-0.11+0.09*pow(y,0.1+0.003*I)
        }
      threshold 0
      contained_by { box {<-0.4, 0, -0.3>, <0.4, 8, 0.3>} }
      max_gradient 1
      translate y*2
      rotate <0, 0, I*10>
      }
  #declare I=I+1; #end
  texture {
    pigment { color rgb <0.9,0.95,1> }
    finish {
      ambient 0.35
      diffuse 0.7
      reflection 0
      brilliance 0.7
      }
    }
  rotate z*60
  }

camera {
  location <0, 0, -30>
  angle 29
  look_at <-1.2, -0.8, 0>
  }

light_source { <500,1000,-500> color rgb 1 }

background { color rgb <0.05, 0.1, 0.2> }