   The curved face sets up the mold in the three-dimensional  space
  Now I am doing a topic, requesting to make use of the NURBS curved face calculate way to carry out  curved face in the three-dimensional  spaceputting together to connect,and  to the concrete real object(for example car,plane and so on) to set up the mold finally.If who can provide the  source code or way of solving this problem for me, I will feel very grateful.Thank you!   
  in addition,  use  openGL  and   c++   