Reverse Engineering Problem

[Gaurav_Chauhan]

Hello All,

I have a set of pipes for which I want to find the path that each pipe traces in 3D space. For this question, I have attached the.gh file with two pipes from the list.

In the figure above, the green curves trace the pipes, and this is what I am trying to figure out in Grasshopper.

Any help would be appreciated. Thank you very much for your time.

Question 14-11-2026.gh (2.5 MB)

[Tom_P]

something like this - maybe

Extract center curves from 3D meshes

Recently I added this method to my compas_wood plugin: #! python3 # venv: timber_connections # r: wood-nano==0.2.0, compas-wood==2.4.0, compas==2.8.1, wood-rui==0.2.2 import Rhino import Rhino.Input import Rhino.DocObjects from Rhino.Geometry import Plane from typing import * from wood_rui import wood_rui_globals, process_input, add_skeleton from compas_wood.binding_rhino import beam_skeleton, mesh_skeleton import System def callback(selection: dict[str, any], name: str): # Just axis wi…

[Eef_Weenink]

Reverse Engineering is most of the time a lot of trial + errror.
and working in small parts.
To get the center line, I would start something like this.
If the results are to grob, cut the mesh in smaller parts (overlapping) and join the curves after that.
NB: As soon you have some curve, redo the work using the curve + perp frames + mesh|plane to get better results.
Regards, Eef

[inno]

for the pipe without bifurcations looks like QuadRemesh+WarpWeft gives pretty interesting results:

Question 14-11-2026_inno.gh (2.6 MB)

[Volker_Rakow]

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