Sweep1 not splitting at tangents

Rhino
1

I’m having trouble generating geometry with Sweep1 with split tangents. All profiles are joined at tangents generating bad solids.
Does someone know how to avoid this or fix it?!
Thanks!

2

Hi @John_Kunst
Best way to get help is to post a file showing what the problem is - it’s close to impossible to tell from your description just what’s going on.
Regards, Jakob

3

Hey, it’s pretty easy. If you look at the image you can see the profiles on the left, the bad result generated by sweep1, and the good result on the right.
If you use a joined curve, rhino generates a single surface, joined at the tangents, which I do not want. I want sweep1 to generate a surface for each curve segment. Otherwise said: if I explode the result of sweep1 I want a surface for each arc and segment for the profile.
I’m not sure when this change was introduced, I suspect when they introduced lightweight extrusions, but since I started working with Rhino again recently this is driving me crazy.

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4

Hi John -

We have crease splitting for Sweep1 on the list as RH-75541 Sweep1: Split cross sections at tangents

I’m not sure if this worked differently at any point, though. I’ve just tested this in Rhino 5 with the same result, and a quick search hit this decade-old post - V6 wish: splitattangents for sweep1

For the time being, you can use the DivideAlongCreases command with the SplitAtTangents=Yes option.
-wim

1 Like
5

Thank you. For now this will work. Might I suggest settings (global or per project) to turn these on or off?