Surface division based on UV points coordinates

Hi everyone,

I am attempting to divide a surface by using points projected onto that surface. Does anyone know a way to go about this?

I was thinking about using the UV points to then create new subdomains and then use isotrim to break up the initial surface that way. Is this possible? How would I rearrange the domain values?

Image 1: Can I rearrange these values? By duplicating the values and then recreating UV domains?

The idea is that I've already calculated the best optimal positions for placing different glass panels on a roof based on the structure.

Image 2 I've used another surface in the effort to communicate this as easily as possible. I've projected grid points onto the surface.

Image 3 The idea is to use these points to then create a paneling system.

But is there another way of going about this? Maybe using the points as the centre instead of the edge points? Voronoi-it up for closest distances?

Thanks guys!

Ben

Replies to This Discussion

Permalink Reply by Yoann Mescam (Systemiq) on August 10, 2011 at 6:32pm

You could perhaps use a Delaunay Mesh (choose wisely the base plane), then Quadragulate it (see here), and get Faces Polylines (WeaverBird). Finally Surface Split with this bunch of curves.

Very imperfect method.

Permalink Reply by Dedackelzucht on August 11, 2011 at 2:08am

hey,

another imperfect version :-)

Best Regards

DeDackel

Attachments:

SurfaceDivision_DeDackel.3dm, 28 KB
SurfaceDivision_DeDackel.ghx, 257 KB

Permalink Reply by David Rutten on August 11, 2011 at 3:30am

You typically get a better result if you perform the delaunay on the UV coordinates instead.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Ben on August 11, 2011 at 3:31am

This might sound stupid, but how come?

Permalink Reply by Yoann Mescam (Systemiq) on August 11, 2011 at 6:51am

Thanks for the tip David, it looks better indeed.

Permalink Reply by john chun on March 31, 2015 at 12:28am

what do you mean by delaunay on UV Coordinates?

Permalink Reply by Ben on August 11, 2011 at 2:46am

Thanks for all the different methods. It helped me a lot in thinking about this problem.

@Systemiq

Thanks for the quadragulate method. I hadn't thought about that. I was thinking along those lines with Voronoi or Delaunay but this seems only feasibly controllable in 2D and like you mentioned it gets imperfect quickly due to the base plane. I was also fiddling with qhull and it didn't bring any good fruits for the time spent on it.

@DeDackel

Hey I hadn't thought about using vertical planes to split the surface...

I guess if the projection of the points are all in the same direction (in this case vertical) then I guess using corresponding planes is a simple enough solution.