Mesh vertices control

Hello everyone,

I am looking for a way to randomly change the position of the mesh vertices (in z axis), but keep the vertices along the perimeter unchanged (yellow area in attached image).
I tried using various graph mappers but they work in a linear shape while I am looking for something radial in order to keep the perimeter to zero.

Alexandros (12.0 KB)

1 (12.9 KB)

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missing (14.9 KB)

P.S. I get a slightly different result if I add Sort Points before Delaunay Mesh:


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Hello @HS_Kim

Thank you, this is exactly what I was looking for.

Sorry, I’m late to the party here, but there are a couple of mesh components in Kangaroo 2 that will get the naked vertices and then their local neighbours inside. Unfortunately it doesn’t output the indices, so you do still have to do a closest point calculation and dispatch, but it should run pretty quick: (11.3 KB)

These K2 mesh utility components are bundled with the latest gh release, so no extra plugins all being well.

Best wishes,


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Thank you for the input @johnharding
Good to know about this native components.

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You can use GHopperGIS to do stuff like this, there is a terrain generator that does this but fancier if you like. Disclaimer I am the developer.