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

#version 3.6;
global_settings {
  max_trace_level 6
  assumed_gamma 2.2
  }

camera {
  location <80, 40, -60>
  angle 92
  look_at <2, -2, 0>
  }

light_source { <50, 100, -1000> color rgb <1, 1, 1> }

isosurface {
  function { pow(x-(1+0.2*sin(24*pi*y))*pow(36-y*y,0.5)*cos(4*pi*y),2)
    +pow(z-(1+0.2*sin(24*pi*y))*pow(36-y*y,0.5)*sin(4*pi*y),2)-0.01 }
  contained_by { box { <-7.4, -5.99, -7.4> < 7.4, 5.99, 7.4> } }
  accuracy 0.01
  max_gradient 500
  rotate y*180
  scale 10
  texture { pigment { color rgbt <0.6, 0.8, 1, 0.7> } }
  finish {
    ambient 0.6
    diffuse 0.3
    reflection 1
    specular 0.8
    phong 0.5
    brilliance 1
    }
  no_shadow
  rotate y*30
  }

background { color rgb <0.001, 0.01, 0.05> }