cam_pos      = [0.231844, 1.06503, 0.594031]';
cam_dir      = [0.568983, 0.411289, -0.71211]';
cam_up       = [-0.767601, 0.576304, -0.280468]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.392401, -0.939242, -0.856005]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;