cam_pos      = [0.147592, 1.46694, 0.752489]';
cam_dir      = [0.382734, -0.0110374, 0.923793]';
cam_up       = [-0.0298139, 0.99926, 0.0242912]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.22809, 0.0489957, -0.508221]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;