// STRING / Coil Shape 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, -155, -80>
  angle 96
  look_at <10, -60, 0>
  }

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

isosurface {
  function { pow(x-6*cos(0.5*pi*y),2)+pow(z-6*sin(0.5*pi*y),2)-0.09 }
  contained_by { box { <-6.5, -15, -6.5> < 6.5, 40, 6.5> } }
  accuracy 0.01
  max_gradient 300
  rotate y*180
  scale <10, 14, 10>
  texture { pigment { color rgbt <0.6, 1, 0.8, 0.6> } }
  finish {
    ambient 0.4
    diffuse 0.3
    reflection 0.7
    specular 0.8
    phong 1
    brilliance 1
    }
  no_shadow
  rotate y*40
  }

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