/* 
	The creates a camera for one of 5 views
	Left, front, right, back, top

	The following must be declared in the main scene file 
	The up vector MUST be perpendicular to the view direction
	eg:
	#declare VP = <0,0,0>;   /* Camera position */
	#declare VD = <1,0,0>;   /* View direction vector */
	#declare VU = <0,0,1>;   /* Up vector */
*/

#declare VR = vcross(VU,VD);

#switch (clock)
#case (0) /* left */
camera {
   perspective
   location VP
   up y
   right x
   angle 90
   sky VU
   look_at VP - VR
}
#break
#case (1) /* front */
camera {
   perspective
   location VP
   up y
   right x
   angle 90
	sky VU
	look_at VP + VD
}
#break
#case (2) /* right */
camera {
   perspective
   location VP
   up y
   right x
   angle 90
	sky VU
	look_at VP + VR
}
#break
#case (3) /* back */
camera {
   perspective
   location VP
   up y
   right x
   angle 90
   sky VU
   look_at VP - VD
}
#break
#case (4) /* top */
camera {
   perspective
   location VP
   up y
   right x
   angle 90
   sky -VD
   look_at VP + VU
}
#break;
#case (5)
camera {
   fisheye
   location VP
   up y
   right x
   angle 180
	sky -VD
	look_at VP + VU
}
#break
#end