cam_pos      = [-1.04206, 1.65371, -0.239896]';
cam_dir      = [-0.0326621, -0.255448, 0.966271]';
cam_up       = [0.0124075, 0.966609, 0.255957]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.32919, -0.0270643, 0.0377747]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;