I’m new in rhino and I have to design a fish-like robot… I just develop the shape of the body fish in rhino with subD object and now i would like to optimize the shape with grasshopper by moving control points of the subD. Is there any command that allows to perform this task?

Hi @Nicolas5 Python is going to be a lot easier here, Grasshopper does not have the required components to set SubD or meshes vertices locations. Here is a file with 4 different ways to set vertices in a SubD, using Python or just Grasshopper components. If you will be changing all control net poi…

Hi @Nicolas5 , I think you’ll find the answers you are looking for in this previous thread: [image] Can't edit subd vertices using python Scripting Hi, I am attempting to modify the coordinates of a subd vertex using python. I thought that editing the vertex …

Thanks Pierre. I try to implement the code in my grasshopper file, but it doesnt’t allow me to pick the subD. Is there any way to solve the task without passing through Python? My idea is to introduce some sliders in order to move control Points, so that I can use optimization tools such as Galapago…

I managed to get the program to run, but I don’t quite understand how to select a specific vertex. Can you help me?

Hi. That’s a nice Python solution. Is it possible to use similar approach but for “edit points” instead of “control polygon points”? I noticed that there’s it’s possible to do so in Rhino, but not sure how to use that using Python. Any hint appreciated, thanks!

Hi @PetrVacek , There is a C# sample available to modify edit points in a SubD: mcneel/rhino-developer-samples/blob/dba9efe1b3dd4399f308d370aea2ed0f6622cfd8/rhinocommon/cs/SampleCsCommands/SampleCsSubDEditPts.cs using Rhino; using Rhino.Commands; using Rhino.DocObjects; using Rhin…

Sharing for anyone to use and improve: [image] File: 230718_SubD_CS_Manipulator.gh (21.9 KB) Component to get “Surface Points” (“Edit Points”, but for SubD): IGH_Param output = this.Component.Params.Output[1]; IGH_PreviewObject param = output as IGH_PreviewObject; param.Hidden = true; List < …

I discovered that I could use your script with two identical subd’s and move one in the Z axis to control the height of pull on [sine-subd-points] [sine-subd-points-script] groups of points… [subd-attractor-surface] 230718_SubD_CS_Manipulator-2.gh (45.7 KB)

subD control Points in Grasshopper

Rhino SubD

brian (Brian Gillespie) August 29, 2023, 10:52pm 9

RH-76637 is fixed in the latest WIP

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Can't edit subd vertices using python Scripting windows , python	6	1305	August 29, 2023
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subD control Points in Grasshopper

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