// http://xahlee.org/3d/index.html

// lathe example

#include "colors.inc"
camera {
  location <7,8,-9> * .7
  look_at 0
}

light_source {<20, 15, 20> color White}

difference {
  lathe { cubic_spline 8,
    <-1,0>,<0,0>, <4,0>, <4,2>, <3,2>, <3,1>,<0,1>,<-1,1>
    texture{pigment{color Red transmit .6}}
    finish {ambient .1 phong .6}
    interior {ior 1.4}
  }
  box { <9,-9,-9>,<-9,9,0>}
  rotate -y*90
}

plane { <0,1,0>, -0.01 pigment {checker color White, color Gray}}