Grasshopper

algorithmic modeling for Rhino

Hi,


I am looking for a solution to find the local lowest points on a mesh, similar to extremes on a curve, just with multiple points as an outcome.

Does somebody already have a solution for that ? Attached find a example mesh.

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Looking for something like this?

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Thank you, but this is not what I am looking for. I need the the lowest point, for each local valley of the mesh. Your solution returns me a domain of points based on the lowest point of the mesh.

Then, how can you define each local valley area?

If the vertex normal points in the -z direction and the normals of the neighboring vertices also all have a component in the -z direction (i.e. not a saddle surface)?

I decided to just look for all vertices whose z value is less than their nearest neighbors. It seems to work here because your mesh is nice and smooth. If it was "corrugated" at all, it could get messy.

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+1

Very nice solution Ethan. I resorted to throwing in a handful of marbles (using Kangaroo) and then cull duplicates. Just noticed I was mistakenly working with the surface instead of the mesh...

Thank you Hyungsoo and Pieter. High praise indeed!

Thank you Ethan, Pieter and  Hyungsoo for your elegant solutions. 

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