Fill type is now of type PropertyEnumerator, allowing enumerated names
in the Data tab. However, it has 2 problems:
1. Invalid shows up
2. The user has the illusion to see the result after changing the value.
However, the result gets updated only
Now if the user creates a surface, the cancel in the widget deletes it.
If an already existing one is opened for editing, cancel rejects the
user change in fill type, but the surface remains.
I have made further cleanup in Bezier and B spline surface code, and
corrected the bug in face creation for B splines (Nate has also written
that that was incomplete).
I have converted Nate's b-spline generation to use my superclass
FeatureBSurf and added it to the GUI. Other half-ready operations as
filling and cut are commented out.
Missing:
- the fill type must be queried from the user. The data panel lets it
modify, but it is not user-friendly.
- b-spline surface is generated, but it covers only a fraction of the
supporting curves. It may lie on OCC error.
