// STRING / Knit String '06.06
// by Tsutomu HIGO  http://www.asahi-net.or.jp/~nj2t-hg/

#version 3.6;
global_settings {
  max_trace_level 5
  assumed_gamma 2.2
  }

camera {
  location <0, -240, -80>
  angle 90
  look_at <-30, 0, 100>
  }

light_source { <-300, -100, -100> color rgb <1, 1, 1> }

isosurface {
  function { pow(x-6*cos(2*pi*sin(y)),2)+pow(z-6*sin(2*pi*cos(y+pi)),2)-0.09 }
  contained_by { box { <-7, -20, -7> < 7, 40, 7> } }
  accuracy 0.01
  max_gradient 500
  rotate y*180
  scale <10, 10, 10>
  texture { pigment {color rgbt <1, 1, 0.4, 0.6> } }
  finish {
    ambient 0.4
    diffuse 0.3
    reflection 0.7
    specular 0.8
    phong 1
    brilliance 1
    }
  no_shadow
  rotate y*90
  }

background { color rgb <0.001, 0.01, 0.1> }