cam_pos      = [0.35711, 1.28864, 0.424002]';
cam_dir      = [0.704957, 0.0725865, -0.705526]';
cam_up       = [-0.0121818, 0.995842, 0.090283]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.943164, 0.0732178, -0.93487]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;