cam_pos      = [0.352157, 1.18947, 0.40885]';
cam_dir      = [0.704957, 0.0725865, -0.705526]';
cam_up       = [-0.0253315, 0.996691, 0.0772313]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.942701, 0.0486417, -0.936936]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;