// ------------ camera parameters --------------------
// Npx = 640.000000  Npy = 480.000000
// dpx = 0.04000  dpy = 0.04000
// Cx = 320.000  Cy = 240.000
// sx = 1.000000
// Transformatiom Matrix =
//   +1.000000000000000 	+0.000000000000000 	+0.000000000000000 	+0.000000000000000 	
//   +0.000000000000000 	+0.000000000000000 	+1.000000000000000 	+0.000000000000000 	
//   +0.000000000000000 	+0.000000000000000 	+0.000000000000000 	-1.000000000000000 	
//   +4000.000000000000000 	-1.000000000000000 	+0.000000000000000 	+0.000000000000000 	
// f     = 40.000000000000000
// kappa = 0.000000000000000
// -----------------------------------------------------------

camera {
  right  - sqrt(image_width/image_height)*x
  up     sqrt(image_height/image_width)*y
  angle   35.489
  matrix
    < -0.000000000000000, -1.000000000000000, -0.000000000000000,
      +0.000000000000000, -0.000000000000000, +1.000000000000000,
      -1.000000000000000, -0.000000000000000, +0.000000000000000,
       4000.00,    -0.00,    -0.00
    >
  translate ctr
}