Hello All, I would like to have a parametric offsetted surface with different values, starting from a given one (please check the file attached). It will be great to have a good control all over the surface, adjusting the values in certain areas (for example 15mm of thickness in the border / red a…

To create a surface from a mesh, the Warp Weft component can be used to extract two lists of mesh edges. These edges need to be joined into polylines and converted to curves and sorted ascending in X and Y to create a network surface. The easiest way to create a smoother transition is to smoothen t…

Sure, simple. But you didn’t post a GH file. :frowning: [image] Help Us Help You Grasshopper Asking questions and getting answers is what this forum is all about. Although people are generally very helpful, there are things you can do to improve your chances …

Sorry Joseph, You’re right. Here’s the file Test1.3dm (123.8 KB)

Your Rhino file doesn’t contain the red, blue and yellow curves. Is the red curve really necessary? How far is the transition between offset values?

[image] You can use Weaverbird to thicken the mesh. Hovering the input shows the relevant info: One distance / vertex wb_thicken_mesh.gh (10.4 KB) PS: I thought this looks like a SubD, hence the mesh workflow.

Yes, I need to keep an even offset on the boundary of the surface. This curves can be fine, I cannot share my current file, so I made a rough surface as an example. Test1b.3dm (164.9 KB)

Hello. Yes, it was a SubD since it’s usually easier for me to adjust the basic surfaces in Rhino, but when I start working in GH i transform the SubD into Nurbs (the final output would be a iges/stp). WB seems to be powerful for my needs, is it possible to work with nurbs too?

I’m not convinced that the red curve is necessary since it isn’t clear what difference it makes? But your SubD is not a surface (it’s a polysurface) so the method I had in mind won’t work.

Instead of converting the SubD to Nurbs in Grasshopper, convert it to a mesh and then after all the manipulation back to SubD and then to Nurbs so you can export it as *.step [image] [image] wb_thicken_subd.gh (10.1 KB)

I can convert the SubD into a Surface with this Flexibility plugin command, so your idea can be helpful. [image] But you can use the attached file too. Test1c.3dm (131.2 KB) For my example, let’s say I want to have 15mm of thickness all around, except on the blue area, where the thickness shoul…

I guess I need to keep two separate nurbs, the “starting” surface and the “variable offsetted” surface, since after that I need to make several nurbs commands (trims, fillets, etc). The first will be the inner skin of the product that I’m modelling and the second will be the outer skin (it’s basical…

Variable offset / thickness

Grasshopper

Joseph_Oster August 16, 2023, 11:02am 2

Sure, simple. But you didn’t post a GH file.

3. Attach minimal versions of all the relevant files

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Variable offset / thickness

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