As part of creating trees, I have hundreds or maybe even thousands of polylines that I want to pipe. The radius varies along the polyline. I tried: Pipe Variable (VPipe): It doesn’t create continuous pipes when used with polylines. A solution is to rebuild the polylines as splines, but it’s not q…

How fast is fast for piping polylines? I thought MP was pretty fast, but I’m guessing you’re doing this for many polylines? Several ways, simplest (my guess) is to loft/sweep + scale a polygon section along the polyline and the likes, but you might have to align + rotate planes and what not—why do …

Some tools are slow because they generate a mesh for each polyline. It is far more efficient to generate ONE mesh for a list of polylines. Here is the result I have with 69902 polylines, 30 s with Mesh Pipe, vs 2.2 s with a single mesh as output. [image] [image]

[image] René Corella: Mesh Pipe (see here or attached .gha) has existed for ages and it’s faster than anything [image] Laurent Delrieu: 30 s with Mesh Pipe, vs 2.2 s with a single mesh as output. !! Haha I take it back - of course I forgot about scripted ways. I lose!

It is not the scripted way that is fast but that it is more efficient to output a big mesh (that is a join of many meshes) than many meshes. It could be good to have a version of Mesh Pipe that reads a list of curves rather than one curve at a time.

[image] Laurent Delrieu: It is not the scripted way […] is more efficient to output a big mesh :sweat_smile: Over my head—I guess it all depends on many things. Here 90k polylines pipe-meshed in 3.0s: [image] Not horrible. But it’s a polyline with only 5 vertices…and I’d still have to ta…

[image] René Corella: Could you share a basic example? How are ~70k 3D polylines piped with varying radii and meshed as a single mesh? Also just in case, I’m by no means questioning you—I’m genuinely asking as a fan. I do remember wild distant relatives (?). [image] 10 years!

[image] René Corella: MeshPipe_vary_cross-section.gh (35.1 KB) Thank you so much for this! It works very well. My summary of your algorithm: Pipe with meshpipe, then rescale the cross section curves with a factor based on their position along the input curve. Find below an example where you…

Not sure it helps but I have done some components in Nautilus that could help making trees. [image] [image] [image] The only “problem” these components need license. tree Nautilus Dendro.gh (63.5 KB) So if you want to try just ask me.

[image] feklee: detected based on them being closed curves. Oh yeah! Duh! :sweat_smile:

[image] Laurent Delrieu: Not sure it helps but I have done some components in Nautilus that could help making trees. Thank you for the offer! I might want to test drive it later. For now, I would like to try if – with the wonderful help in this forum – I can find a simple way to create trees …

Fast way to pipe polylines? (with varying radius)

Grasshopper

Volker_Rakow (Volker Rakow) February 25, 2026, 12:42pm 19

Post moved to the appropriate thread .

Topic		Replies	Views
Fixed Angles Polyline for Waste Water Pipes Grasshopper windows , rhino7 , grasshopperrhino	26	546	October 9, 2024
Pipe with polygon sections Grasshopper windows , mac	18	1531	March 23, 2024
Dividing polyline into single lines between points Grasshopper windows	13	1761	November 13, 2023
Pipe thousands of lines in gh without crashing Grasshopper windows , grasshopper2	5	1245	April 9, 2021
Need optimization for very heavy (shower)hose Rhino for Windows	51	7402	June 29, 2016

Fast way to pipe polylines? (with varying radius)

Related topics