Creating a surface at the outside points

Replies to This Discussion

Permalink Reply by Joseph Oster on March 9, 2017 at 11:05am

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?

Permalink Reply by Chapulin Colorado on March 9, 2017 at 11:20am

maybe like this,if its planar:

Permalink Reply by Chapulin Colorado on March 9, 2017 at 11:43am

when a brep is ok, like this.

meshToNurb i think its a part of a def from dannyboyes

Permalink Reply by Joseph Oster on March 9, 2017 at 11:53am

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.

Permalink Reply by Bakursky Ivan on March 9, 2017 at 12:23pm

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

Permalink Reply by peter fotiadis on March 9, 2017 at 12:32pm

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.

Attachments:

• Mimic _a_concave_hull_V1.3dm, 64 KB
• Mimic _a_concave_hull_V1.gh, 136 KB

Permalink Reply by Bakursky Ivan on March 9, 2017 at 12:46pm

super cool, peter

Permalink Reply by ng5 Alex on March 9, 2017 at 1:07pm

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

alex

Permalink Reply by peter fotiadis on March 10, 2017 at 1:52am

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

BTW: this is a real concave hull thingy:

Attachments:

• Mimic _a_concave_hull_V1A.gh, 146 KB