Hi Michael,

Thank you very much for these clarifications!

> I could probably change some of this in v4 to make it a bit more friendly

I'm confident that your v4 Api will be more friendly and powerful, and i hope that will supply some Object Model
to access and operate on the objects' topology (control points, etc...).

Please let me ask one more question...

I'm trying to write a node for NodeEditor, that should be a modified version of "planarsrf" command,
that should return in output only the "caps" surfaces eventually generated ?

Can i apply the same logic that you have explained for the ShrinkTrimmedSrf command ?

That is, call .update() and than .getCreatedObjects() before .commit() ?
Or i must call .calculate(), than .getCreatedObjects(), and than . cancel() ?

Or it's a totally different thing ?

Thank you very much and have a nice day,

Marco (mkdm).