[PXL_20250818_112000500~3] I have question that I’m facing issues solving. Like in the sketch (top view) , for any 3d polyline where the vertices are in different heights in the z axis, how could I make the polyline break at a certain radius limit of the vertice, wrap around it in that vertice’s xy…

Hmm, I tried something else to avoid working off of a 2D curve (which was my first thought) as your title implies you wish to apply your method to “any” 3D polyline. I think it can be done better. My concern/question still was about the original polyline segments getting modified, which must happen…

What’s the rule that says DE connects the tangents of the circles, but EF is aligned to the centres?

Hey @martinsiegrist thanks for your reply! It’s a interesting topic that I didn’t know about. But reading through it, I see that is a great solution for 2d closed curves. I’m trying to make it happen for a open polyline where each of the vertices are at different heights. So there is one segment goi…

Hey @Tom_Newsom Thanks for your reply! There is no specific rule for this. I actually sketched both the options in the same polyline. But it would already be a huge step for me if I could solve this just aligned with the centre like in EF.

[image] arkitetme: vertice Many vertices, one vertex…

[image] arkitetme: for any 3d polyline […] wrap around it […] that vertice’s xy plane For ‘any’ 3D polyline (or 2D), the vertices’ ‘xy’ planes don’t necessarily follow the two adjacent lines: [image] Anyway, not sure that matters - maybe something like this?: polyline-vertex-arcs_b.gh (35…

Thanks for your reply and i really appreciate your solution! its quite interesting but, I want the circles to have the vertex as a center point and be in the xy plane. once the circle is cut, the end points of the segment move to the start point to the split circle like in the images! [image] [i…

Do you need somethink like this? [image] [image] [image]

Yes!! This is perfect! can i please know how you did this :slight_smile:

Ah I see now what you meant with the XY plane. I misinterpreted that. Circles must be parallel to the rhino world regardless of polyline shape.

Making a circular wrap around any 3d polyline's vertices

Grasshopper

martinsiegrist (Martin Siegrist) August 18, 2025, 10:02pm 2

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Making a circular wrap around any 3d polyline's vertices

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