This seems simple, but I cannot figure out a simple solution. I want to get a flat mesh to expand and “compress” in 2D (not height field), based on black and white values. Similar to this image … Any hints? [MESH DEFORM]

Hello did you try this ? [image] Deform mesh internal edges without changing the shape Grasshopper shrinkbycolour2.gh (27.5 KB) [image] I scripted a new goal that shrinks edges by how red the closest point on the input mesh is.

Can’t you use point fields to move the vertices? Deconstruct Mesh to get vertices. Move them according to the field vectors in XY only. Construct Mesh from new points.

Thanks Laurent! I’m looking at your shrinkbycolour3 script, what I need goes in that direction. I have never used Kangaroo, but I give it a try.

Looking into it @martynjhogg , thanks … I’m new to this approach so looking for similar answers in the forum. Do you have any pointers on examples/tutorials for doing something like this.

Looking again at this, the shrinkbycolour example that @laurent_delrieu has suggested by @DanielPiker is probably better. The way I suggested can pull mesh vertices towards points but it’s hard to control and stop points overlapping etc. ShrinkByColour outputs lines though, not a mesh, but if you …

Getting a mesh out is just a matter of connecting the mesh to the Show component. I’ll upload a file later.

Here a version that outputs a mesh. There is a slider which gives you the option of using a less dense mesh for the output than the one actually used to calculate the shapes (which can give a smoother result). [image] imagebrightnessmesh.gh (57.5 KB) and the image input used [blur]

Thanks @martynjhogg , @DanielPiker this all works too nicely. I am tweaking and testing. Thanks again.

Just out of interest, what is your project?

I am designing custom lattice structures that adjust to b/w or color saturation images that result from a pressure sensor. With the adjusted mesh (expanded and compressed areas), I am creating a twisted box array and from there a gyroid structure. But I am new to many of these concepts, especially k…

Deform a 2D mesh based on a contrast image

Grasshopper

laurent_delrieu (Laurent Delrieu) December 6, 2023, 4:49pm 2

Hello
did you try this ?

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Deform a 2D mesh based on a contrast image

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