Geometric modeling

Examples where powerful geometrical modeling should be useful:

1.

Produce a spare part when original drawings or specifications of components are no longer available (e.g. think of older car parts, made before the systematic use of CAD systems - not so long ago).

2.

Modify the design of an existing part to permit new simulations.

3.

Permit to efficiently model interactions and joints/blends between components, by preserving key object features.

4.

Provide ``appearance'' modification tools, i.e., make available shape processes to stylists: increase the existing appeal of the object, e.g. make a ``visible'' car part more pleasing to the eye, provide 2nd (or higher) order continuity between the constituent surface elements, etc.