cam_pos      = [0.366761, 1.38876, 0.428431]';
cam_dir      = [0.704957, 0.0725865, -0.705526]';
cam_up       = [-0.0030899, 0.995054, 0.0992865]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.943295, 0.0901909, -0.933253]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;