//  Generic camera definition - math-like coord system 
//  Last edited on 1999-02-13 10:26:02 by stolfi

//  Defines
//    camera_dist

#declare camera_vector = camera_pos - win_center;
#declare camera_dist =
  sqrt(
    camera_vector.x*camera_vector.x +
    camera_vector.y*camera_vector.y +
    camera_vector.z*camera_vector.z
  );

camera {
  location   camera_pos
  direction -camera_vector
  right     < -win_width, 00.0000, 00.0000    >
  up        <  00.0000,   00.0000, win_height >
  sky       camera_sky
  look_at   win_center
}