cam_pos      = [-0.581229, 0.917426, -0.164422]';
cam_dir      = [0.811823, 0.0719501, -0.579454]';
cam_up       = [0.583148, -0.0494159, 0.810862]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.0395108, 1.32492, 0.109159]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;