cam_pos      = [0.461766, 1.46639, 0.946243]';
cam_dir      = [0.0935835, -0.0538206, 0.994156]';
cam_up       = [-0.0219068, 0.998185, 0.0561009]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.32384, 0.0359484, -0.122672]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;