Untrimming NURBS

[Guillemot]

I've imported some NURBS created in MaxSurf, a naval architecture package, into Vectorworks. I would like to do some more manipulation. They come in as trimmed surfaces, even though I have not been trimmed them.

Is there a way to untrim NURBS surfaces returning them to their "full" size?

[Benson Shaw]

Untrim is button near bottom of OIP.

The resulting untrimmed surface is usually a NURBS surface in the shape of the extents of the Trimmed version often a rectangle with some bulges out of plane if the source NURBS is not planar.

Explain more or post examples if this is not what you meant.

HTH

-B

[Guillemot]

If it was a snake it would have bit me. Thanks.

That did untrim the surfaces. But it looks like Vectorworks can not handle the surfaces.

When I hit untrim, the surfaces disappeared. The vertices remained, but the surface is not drawn. With one surface I was able to create an interpolated surface (Not a great representation), but the other it just gave me a "Create NURBS Surface failed" error. "Rebuild NURBS…" fails as does "Extend NURBS…"

It think this likely relates to an ongoing problem I have had with Vectorworks from multiple versions back where it is unable to deal with NURBS containing congruent control points.

[Benson Shaw]

Can you post a VWX file with an object you are working on, or a link to a similar example for import into VWX? I'd like to explore the surface and the problems you encounter.

-B