// Persistence of Vision Ray Tracer Scene Description File
// File: ?.pov
// Vers: 3.6
// Desc: Basic Scene Example
// Date: mm/dd/yy
// Auth: ?
//

#version 3.6;

#include "colors.inc"

global_settings {
  assumed_gamma 1.0
}

// ----------------------------------------

camera {
  location  <0.0, 0.5, 30.0>
  direction 1.5*z
  right     x*image_width/image_height
  look_at   <0.0, 0.0,  0.0>
}


light_source {
  <0, 0, 0>            // light's position (translated below)
  color rgb <1, 1, 1>  // light's color
  translate <-30, 30, 30>
}

// ----------------------------------------

#declare earth_tex = texture {
pigment {
image_map {
  jpeg "nasa_blue_marble.jpg" // the file to read (iff/tga/gif/png/jpeg/tiff/sys)  
  map_type 1        // 0=planar, 1=spherical, 2=cylindrical, 5=torus
  interpolate 2     // 0=none, 1=linear, 2=bilinear, 4=normalized distance
  once           // for no repetitive tiling   
}
}  
  normal {
    bump_map { // uses image color or index as bumpiness
      jpeg "earthbump_usgs.jpg" // the file to read (iff/tga/gif/png/jpeg/tiff/sys)
      map_type 1        // 0=planar, 1=spherical, 2=cylindrical, 5=torus
      interpolate 2     // 0=none, 1=linear, 2=bilinear, 4=normalized distance
    // once           // for no repetitive tiling
    // [use_color | use_index]
      bump_size 2.5     // 0...3
    } // bump_map    
  } 
} 

#declare earthclouds_tex1 = texture {
pigment {
      bozo
      turbulence 0.55
      octaves 6
      omega 0.7
      lambda 2
      color_map {
          [0.0 0.1 color rgb <1, 1, 1>
                   color rgb <0.95, 0.95, 0.95>]
          [0.1 0.5 color rgb <0.85, 0.85, 0.85>
                   color rgbt <1, 1, 1, 1>]
          [0.5 1.0 color rgbt <1, 1, 1, 1>
                   color rgbt <1, 1, 1, 1>]
      }
      scale <3, 1.5,3> 
      translate 0.5*x
}
  finish {           // (---surface finish---)
    ambient 0.1
    diffuse 0.5
    reflection 0
    specular 0    
  } 
}



#declare clouds = 1;

#if (clouds)
  #declare earth = union { sphere { 0, 6.378 texture{earth_tex}} sphere { 0, 1.01*6.378 texture{earthclouds_tex}} scale <1,6.3568/6.378,1> rotate 20*y /*rotate 23.45*z*/}   
#else
  #declare earth = sphere { 0, 6.378 texture{earth_tex} scale <1,6.3568/6.378,1> rotate 20*y /*rotate 23.45*z*/}
#end

object { earth }