Is there any way to control the location of the seam during the execution of the pipe command? I am working with degree 2 curves mostly and some pipes have the seam to the inside and some go to the outside. The behavior is unpredictable and I need consistency for use of those pipes down the road. T…

One more thing about the “Pipe” command. While using degree 1 lines (the most basic straight line with two control points total), is there a way to tell Rhino whether to build a pipe (cylinder) with degree 1 or degree 3 (with two extra rows of control points inside the surface) along the line?

Hi Wim, I think a good script/automation for this would be a pipe which first refers to a brep that the ‘curve to be piped’ is on. [pipe] See above. The plane in the background which eventually splits the pipe does so very close to the seam of the pipe (coloured yellow) and so can be problematic…

I would be VERY interested in any scripting to support this piping issue. I deal with it all the time and can’t count the hours lost to SrfSeam. My own scripting capabilities are not up to the challenge.

There is also another issue with “Pipe”, or actually the way cylinders are being split with the “Isocurve” option of the “Split” command. When you do so, by default Rhino will try to split the pipe (or the cylinder) along its length. This behaviour is counter-intuitive, because in most cases the mod…

So I guess swapping the defualt directionof how the pipe is corrected? Yes splitting along the length is counter intuitive indeed. Although I hadn’t noticed, even as a fellow 3d connexion user.

Yeah, not sure why the “McNeel” team opted for the counter-intuitive direction for the “Split” (via Isocurve) and “Extract isocurve” commands on pipes and extruded surfaces from circles. It’s inconsistent when you compare it with the proper direction for both of those commands applied on cylinders b…

Hi Wim, I found a peculiar example which explained things well this morning. Two of these projected curves orient away, so when they are eventually split I will get one surface. The third inexplicably is downwards. I tried flipping the curve, no dice. So I’m not sure what the logic is behind the sc…

Hello- the problem appears to be here: [image] There are two short segments in there near the ends that seem to make the difference - not quite sure how, yet. At any rate it is fixed in V7/WIP. The miters are not made at 1 but the pipe is complete, if disjoint. -Pascal

Good to see it’s something improved on in V7. What would you make of the earlier example of the seams of three similar enough looking curves, having one that points entirely in a different direction? SrfSeam is of course a fix, but not ideal if you also want to align round caps and if you have man…

better_pipe.py (1.5 KB) Hi Wim, Couldn’t upload my gif but this script shows the basic premise.in simple cases, keeps that seam nice and far away from the surface. Obviously very early and doesn’t account for the seam being the right side of the surface necessarily. Would be interested in whether…

Seam location on Pipe

Rhino Rhino for Windows

Rhino_Bulgaria (Bobi) December 17, 2020, 4:16am 17

I just did some tests and the UV direction is still inconsistent in Rhino 7. This is inconvenient in situations where the goal is to extract isocurve or split the extrusion/pipe with isocurve. Example:

Electric supercar

Pipe on circles/arcs/lines

Bug with Gumball and confusing feedback by Osnap

Topic		Replies	Views
Pipe failure Rhino for Windows	10	525	February 27, 2020
Pipe Seam Issue Not Allowing Split Rhino windows	3	236	March 10, 2024
Wish: Fix these several major flaws of "Pipe" Rhino for Windows windows	6	900	May 12, 2023
How can I avoid getting this seam? Rhino for Windows windows , rhinocommon , python , rhino7	8	837	October 20, 2021
Pipe on circles/arcs/lines Rhino	35	623	August 22, 2025

Seam location on Pipe

Related topics