cam_pos      = [0.347506, 1.10999, 0.396026]';
cam_dir      = [0.704957, 0.0725865, -0.705526]';
cam_up       = [-0.0405325, 0.997247, 0.0620997]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.941761, 0.0201906, -0.938924]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;