cam_pos      = [-0.19686, 1.50639, 0.71068]';
cam_dir      = [0.932608, -0.16657, 0.32015]';
cam_up       = [0.359999, 0.491718, -0.792852]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.0337263, -1.13672, -0.689665]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;