// Persistence of Vision Ray Tracer Scene Description File
// File: black_hole.pov
// Vers: 3.6
// Desc: Demo of Witch of Agnesi uses as "gravity well"
// Date: 10/11/2007
// Auth: Tim Attwood
//

#version 3.6;
global_settings {
  assumed_gamma 1.0
}

#include "colors.inc"
#include "shapes.inc"
#include "shapesq.inc"

camera {
   location  <3.0, 3.5, -4.0>
   direction 1.5*z
   right     x*image_width/image_height
   look_at   <0.0, 0.0,  0.0>
}

background {Black}

light_source {
  <-30, 30, -30>           
  color rgb <1, 1, 1> 
}

object {
   Witch_Hat
   texture {
   pigment {
       radial
       color_map {
          [0 Green]
          [0.025 White]
          [0.05 Green]
          [0.05 Clear]
          [1 Clear]
       }
       frequency 12
       scale 0.05
   }
   }
   texture {
   pigment {
       uv_mapping 
       gradient y
       color_map {
          [0 Green]
          [0.025 White]
          [0.05 Green]
          [0.05 Clear]
          [1 Clear]
       }
       scale 0.1
   }
   }
   texture {
   pigment {
       onion 
       color_map {
          [0 Green]
          [0.025 White]
          [0.05 Green]
          [0.05 Clear]
          [1 Clear]
       }
   }
   }
}