Patent ID: 11928391
Assignee: AUTODESK, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  B | IPC B  G

Claim 21:
22. The non-transitory computer-readable medium of claim 21, wherein the one or more geometric modifications result from NURBS control vertices changes received as the direct edit previously performed using the NURBS modeling tool, and the operations comprise:
finding at least one deleted NURBS surface in the stored NURBS surfaces in accordance with one or more of the relationships tracked by the topological control structure and the updated limit surface;
for each of the at least one deleted NURBS surface, removing the deleted NURBS surface from the group node containing the stored NURBS surfaces and updating the relationships in the topological control structure;
finding at least one created NURBS surface in the updated limit surface that, in accordance with one or more of the relationships tracked by the topological control structure, does not have a corresponding NURBS surface in the stored NURBS surfaces; and
for each of the at least one created NURBS surface, adding the created NURBS surface to the group node containing the stored NURBS surfaces and updating the relationships in the topological control structure.