Grasshopper

algorithmic modeling for Rhino

There is a cloud of points:

How to select all extreme points and make a surface of them?

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Are the points all on the rippled surface shown?

How do you define "all extreme points"?  It's not obvious why the perimeter jogs to touch some points and not others?

Can you post a Rhino or GH file?

maybe like this,if its planar:

when a brep is ok, like this.

meshToNurb i think its a part of a def from dannyboyes

Looks good, and the 'H' curve could be projected onto any non-planar surface.  The example posted in the question doesn't appear to conform to this "convex" algorithm, however, as it has "concave" segments.

Thanks guys. I mis-drawn what I meant. The second option by Chapulin Colorado suits me.

In fact you need a concave hull approach (not convex). Since my stuff is strictly internal get this (using a convex hull for preparing some data) that "mimics" a concave hull up to a point.

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super cool, peter

You can try alpha shape found in Milkbox group. You need to be a member of the group to see the page.Best

alex

And this makes a bit more sense for testing your stuff.

BTW: this is a real concave hull thingy:

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