Applying a pattern on double concave mesh

Grasshopper
1

Hi

I am trying to come up with a way to apply a pattern of some kind (let´s say Voronoi kinda thing) on a strongly curvy mesh.

I have a design of a part to be 3D printed but would need some customizing solution to create interesting “skins” on it. So far I have tried to solve the issue with image sampler and attractors. Being fairly new to Grasshopper I find it extremely tricky to get the stuff working on my mesh that is pretty complicated. All the examples I´ve seen are about mildly curvy shapes that are basically squares.

Here´s the top-back area of the part that should be modified:

mesh.stl (79.8 KB)

Obviously the actual part is a closed mesh, but this area is where the “skin” should be made, and in effort of simplifying things I cut off the rest of the part.

I am not attaching any grasshopper file because I don´t have anything good to start with - I don´t know what would be a good way to approach the solution.

If somebody can help me I´d be eternally thankful :slight_smile:

2

Can you post an example of what you want to draw on the ‘skin’? If it is just simple curves, I would go about like this:

  1. Generate the required curves on a flat surface
  2. Generate an untrimmed surface using the mesh
  3. Remap curves from the surface in 1 to the surface in 2

This won’t work for an image as it might get distorted if you stretch it over the surface

3

Yes, simple curves that need then to get “meat” around themselves (pipe, extrude, thicken, whatnots).

All right, I´ll try yuour proposal next.

Thanks!