// Boolesche Operationen, Beispiel 3
// ---------------------------------------------------------------
#version 3.5;                         // benötigte POV-Ray-Version
#include "colors.inc"                 // Defintion der Farben
#include "textures.inc"               // vordefinierte Oberflächen
background {White}                    // Farbe des Hintergrundes

camera {
   angle 25
   location <15, 15, -30>
   look_at <0, 0, 0>
}
light_source { <-20, 20, -20> color White }

difference{
intersection{
sphere {<0,0,0> 4}
box {<-3,-3,-3> <3,3,3>}
}
sphere {<0,0,0> 3.5}
 pigment { color rgb<0.8,0.8,0.8> }
no_shadow}

/*#declare Font1="cyrvetic.ttf";

union{                          // X-Achse
  cylinder{-x*5.5,x*5.5,.05}
  cone{ x*6.5,0, x*5.5,.15}
   #declare Count=-5;
   #while (Count < 6)
    sphere {<Count,0,0>, .11}
   #declare Count=Count+1;
   #end
                               // y-Achse
  cylinder{-y*5.5,y*5.5,.07}
  cone{ y*6.5,0, y*5.5,.15}
   #declare Count=-5;
   #while (Count < 6)
    sphere {<0,Count,0>, .11}
   #declare Count=Count+1;
   #end
                               // z-Achse
  cylinder{-z*5.5,z*5.5,.07}
  cone{ z*6.5,0, z*5.5,.15}
   #declare Count=-5;
   #while (Count < 6)
    sphere {<0,0,Count>, .11}
   #declare Count=Count+1;
   #end
                              // Achsenbeschriftungen
 text{ttf Font1 "x",0.1,0 scale <1.5,1.5,1.5> translate <5.9,-1.2,0>}
 text{ttf Font1 "y",0.1,0 scale <1.5,1.5,1.5> translate <-1,5.7,0>}
 text{ttf Font1 "z",0.1,0 scale <1.5,1.5,1.5> translate <-1,-0.2,5.8>}

 texture { 
   pigment { rgb<0.1,0.1,0.5> }  
   finish { ambient 0.1 diffuse 0.4 reflection 0.2 brilliance 1 specular 0.3 roughness 0.2 }
   }
 no_shadow
}
*/