Hi, I have got a form here, that seems to avoid being cut by an extrude. Can you tell me what is wrong?
Thanks
Form is unaffected by extrude
There are a number of warnings in your design that you might want to address before continuing with it.
Aside from that, however, your design has fallen victim to one of the many bugs when working with T-Splines.
@jeff_strater this is another case where we have an orphaned T-Spline that is clearly visible in the viewport but after leaving the T-Spline form does not show up as a body.
#OrphanedTspline - I see it's an actual thing now!
Thanks for taking the time to look at the example. It's a student's work, and I am trying to resolve the issues.
I have edited the form (1), and hidden the two bodies in the browser (2), but another (orphan) t-spline form is visible and unselectable/uneditable (3). Is this just a bug which we just got to put up with?
This bug seems ot only occur when 2 T-Spline meshes are created in a single form feature (the on in the timeline) that would usually convert into 2 separate solid bodies. That's also the reason why there are 2 T-Spline bodies in the timeline.
One of the T-Splines, however cannot convert into a solid body because it has self intersecting geometry. That's when this bug occurs. This can easily be foxed by copying the 2 T-Splines each into their own separate T-Spline/Form features as shown in the screencast. Design is attached and should work.
Looking through the timeline of this design it is clear that this student is out of his depth and I. am wonder when he will get frustrated without guidance.
Sorry, I was out of town last week, so just getting to this today. Perhaps I grabbed the design after it had already been fixed. But, as near as I can tell with the version of the model I have, there are no orphaned bodies from TSplines in this model. Perhaps, though, I am just missing the core issue here. In general, it should be perfectly fine to have one Form feature which contains any number of TSpline bodies. They should each get converted to a BRep body on exiting from Sculpt mode. See the screencast below.
Jeff Strater
Engineering Director
The very first model in this thread exhibited this problem. Unfortunately I don;t have it anymore. But we did have this same problem in another thread if you remember.
