constructor-s

% pts1 = [-97.7589, 107.423, 424;
%     92.029, 110.208, 432;
%     73.7443, 20.5885, 427;
%     -75.4565, 17.4702, 424;
%     13.7856, 64.4569, 425];
% 
% pts2 = [-37.0552, -124.662, -411.111;
%     -28.2589, 87.5111, -421.536;
%     -123.679, 63.8717, -417.216;
%     -132.088, -101.241, -408.636;