cam_pos      = [0.595483, 1.63313, 1.19216]';
cam_dir      = [-0.281673, -0.0502384, -0.958194]';
cam_up       = [-0.483306, 0.870122, 0.096453]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-1.10244, -0.652058, 0.358262]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;