#include "metals.inc"

#declare RR = 4;

#switch (clock)
#case (0)
   #declare VP = <-RR,0,0>;
   #break
#case (1)
   #declare VP = <0,-RR,0>;
   #break
#case (2)
   #declare VP = <0,0,-RR>;
   #break
#case (3)
   #declare VP = <-0.7*RR,-0.7*RR,0>;
   #break
#case (4)
   #declare VP = <0,-0.7*RR,-0.7*RR>;
   #break
#case (5)
   #declare VP = <-0.7*RR,0,-0.7*RR>;
   #break
#case (6)
   #declare VP = <-0.7*RR,-0.7*RR,-0.7*RR>;
   #break
#end

camera {
   location VP
   up y
   right x
   angle 60
   sky <0,0,1>
   look_at <0,0,0>
}

light_source {
  <-15,0,0>
  color rgb <1,0.5,0.5>
}
light_source {
  <0,-15,0>
  color rgb <0.5,1.0,0.5>
light_source { 
  <0,0,-15>
  color rgb <0.5,0.5,1.0>
}

isosurface {
   function {
      x*x + y*y + z*z + sin(4*x) + sin(4*y) + sin(4*z) - 1
   }
   contained_by {
      sphere { <0,0,0>, 4 }
   }
   threshold 0
   accuracy 0.01
   max_gradient 25
   open 
   texture { T_Silver_5C }
}