Wu,
Have you had a chance to look over the ON_X_EVENT api? If it (or some
variation of it) looks like it would be useful, I would suggest carving out
at least a little time in your proposal for moving it over to libbrep and
making sure it is modified to suit your needs, since openNURBS upstream has
removed it. If that style of API doesn't look like the way you want to go,
it might be a good idea to discuss how you plan to approach the possible
different return types from intersections (point, polyline, surface, etc.)
- that will be a part of the API where keeping the design "clean" will be
helpful later.
Cliff
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