Stop Sweep from interseting itself

[raincole]

With Sweep SOP, I swept this profile:

Over this curve:

And got this:

Now how could I get rid of this self-intersection? I know I can manually remove some points from the original curve, but is there a more procedural way? Like to detect the "concave" part of the curve and adjust their orientation?

[oneXone]

I tried solving this with a polyfill and then converting it to a VDB (and then back to polys). It's unreliable though. Maybe something with a vellum-solved shrink wrap could work more generally? 

[Aizatulin]

Hi,

probably not working in every situation, but you can collect all points, which have a sharp corner. Once you have these points, you can clip the geometry by the dividing planes (u-value aswell). The clipping part should be restricted to the intervals between each corner.

Sweep_avoid_intersection.hipnc

using carve can be another option, to split the curve into several parts (applied sweep), which can be merged together, after the ends are clipped by the planes.

 

Sweep_avoid_intersection_segments.hipnc

Edited February 9, 2022 by Aizatulin

[raincole]

On 2/8/2022 at 11:38 PM, Aizatulin said:

Hi,

probably not working in every situation, but you can collect all points, which have a sharp corner. Once you have these points, you can clip the geometry by the dividing planes (u-value aswell). The clipping part should be restricted to the intervals between each corner.

Sweep_avoid_intersection.hipnc

using carve can be another option, to split the curve into several parts (applied sweep), which can be merged together, after the ends are clipped by the planes.

 

Sweep_avoid_intersection_segments.hipnc

 

Clever! Thank you very much.