Hoping I can get some advice – I’m trying to model a flexible attachment that will fit over a moving joint (similar to a cv boot). The part will have a flexible cv boot form connecting between two “cuff” surfaces which will mount to the device. I got the profile curves for the edges by getting dime…

I aim for “close” with my subd stuff, then I convert to nurbs, then pipe trim the edge and then connect them using a blend surface. see video for pipe trim info if you are not familiar with that trick. [Rhino 7 - Pipe trim trick]

Hello - can you post a file with the object and the input3, or send to tech@mcneel.com with a link back to this topic in your comments? Oops- never mind I see the file. I don’t know what you do, design wise, when the distance between the ends of the boot vary so much - there must be best practices…

I feel like with subd I can just adjust the edge loops until the folds look right - the problem I’m running into is just transitioning from the subd surface to a normal nurbs surface (having the edge of the subd match with the outer profile curve accurately). I might be better off just constructing…

Be aware that SubD surfaces at edges and creases always have zero curvature in the direction perpendicular to the edge or crease. That is how the math works for SubD in Rhino. An alternative to building the SubD surface would be to create a curve with the appropriate waves between the edges of the …

Thanks David. I tried just using my subd surface as a basis for the folds and projecting some lines onto it to use as sweep sections - closing the sweep didn’t really work (looked like it was having problems lining up the sweep sections and not twisting them (had to use multiple since the folds are …

Thanks Kyle - I’m not familiar with the pipe trim method but will definitely give it a try. I looked into blend surface earlier and was just using offset curve on surface for the outer edge of the boot to give it some space to work. - The pipe method seems like it will work better. Thanks for the he…

I like the pipe method because it’s pretty quick, especially if you chain the edges of the surface edge you are going to pipe- In cases where the edges are less than awesome, pipe them anyways, then use the smooth function of the moveuvn command to “untie” messy control points of the resultant pipe- …

Only one section can be sufficient using Sweep2. Boot1CrvSweep2DC01.3dm (1.7 MB) [ViewCapture20220107_185504] [ViewCapture20220107_185719]

Keep in mind, if you are just 3d printing, you can mesh teh part and then offset the mesh with thickness and the “solid” option and not have to work thru making a nurbs offset.

Matching subd edge to polysurfaces?

Rhino SubD

user3010 January 13, 2022, 10:38pm 10

Sorry for the lack of feedback – the pipe trim method worked well, though I’m running into issues with offsetting/adding thickness to the whole thing for 3d printing. I opened a new topic for this. Thanks again!

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Matching subd edge to polysurfaces?

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