// Persistence of Vision RayTracer version 3.1 Scene description file
// File:        ENGINE_BURN.INC
// Description: A general engine burn include for all space models.
// Date:        99/12/09 - 09:14
// Author:      H.E. Day
//
// Version:     0003

#ifndef (setting)
  #declare setting = 1;
#end

#declare engine_burn =
#if (setting > 1)
  union {
    sphere { <0, 0, 0>, 0.65 
      pigment { rgbt 1 }
      interior {
        media {
          emission 1/4/1.5
          density {
            spherical
            color_map { 
              [ 0 rgb <1, 0, .5> ]
              [ 0.25 rgb <1, 0, .5> ]
              [ 1 rgb 4 ] 
            }
          }
        }
      }
      hollow
      no_shadow
      scale <6, 6, 6>*2
    }
    sphere { <0, 0, 0>, 0.65 
      pigment { rgbt 1}
      interior {
        media {
          emission 1/4/1.5 
          absorption .1/2
          samples 10, 10
//          sample_method 2
          density {
            spherical
            color_map { 
              [ 0 rgb 0 ]
              [ 0.25 rgb <1, 0, .5>/2 ]
              [ 1 rgb 2 ] 
            }
            translate -z/2
          }
        }
      }
      hollow
      no_shadow
      scale <6, 6, 12>*2
      translate <0, 0, 8>
    }
    sphere { <0, 0, 0>, 0.65 
      pigment { rgbt 1}
      interior {
        media {
          emission 1/24 
          absorption .1/2
          samples 10, 10
//          sample_method 2
          density {
            spherical
            color_map { 
              [ 0 rgb 0 ] 
              [ 0.5 rgb <1, 0, .375>/2 ] 
              [ 1 rgb <1, 0, .375>*4 ] 
            } 
            scale 0.5
          } 
        }
      }
      hollow
      no_shadow
      scale <12, 12, 12>*6
      translate <0, 0, 4>
    }  
    scale 1.5
  }
#else                          
  union {
    sphere { <0, 0, 0>, 0.65 scale <6, 6, 6>*2 }
    sphere { <0, 0, 0>, 0.65 scale <6, 6, 12>*2 translate <0, 0, 8> }
    sphere { <0, 0, 0>, 0.65 scale <12, 12, 12>*6 translate <0, 0, 4> }
    scale 0.25
    texture { green_tex }
  }
#end