#include "metals.inc"
#include "glass.inc"
#include "colors.inc"
#include "finish.inc"

#declare VP = <4,4,4>;

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

global_settings { 
	ambient_light rgb <1,1,1> 
}
background { 
	color rgb <1,1,1> 
}
light_source {
  <5,10,0>
  color rgb <1,1,1>
}

#declare R1 = 2;
#declare R2 = 0.75;
#declare TORUS = torus {
	R1,R2
	pigment {
		color rgb <0,1,0>
	}
}

#declare PLANE1 = plane {
	<0,1,0>, 0.6
	pigment {
      color rgb <1,0,0>
   }
}

#declare PLANE2 = plane {
   <1,0,0>, 0
   pigment {
      color rgb <1,0,0>
   }
	rotate <0,-20,0>
}

#declare LEN = sqrt(R1*R1 - R2*R2);
#declare PLANE3 = plane {
   <1,0,0>, 0
   pigment {
      color rgb <1,0,0>
   }
   rotate <0,0,90-degrees(atan2(R2,LEN))>
}

#switch (clock)
#case (0)
	object { TORUS }
	#break;
#case (1)
	intersection {
		object { TORUS }
		object { PLANE1 }
	}
	#break;
#case (2)
   intersection {
      object { TORUS }
      object { PLANE2 }
   }
   #break;
#case (3)
   intersection {
      object { TORUS }
      object { PLANE3 }
   }
   #break;
#end