Tspline surface to grasshopper / trigrid

Replies to This Discussion

Permalink Reply by Giulio Piacentino on October 8, 2014 at 2:09am

Hi Marietta

those two surfaces seems to be very easy to re-construct as a single NURBS surface, as their shape is rectangular. If you do that, you can use all regular tessellation strategies.

Alternatively, you could create a simple mesh with that structure and project it to the surfaces.

Does it help?

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Permalink Reply by Blisza on October 8, 2014 at 2:47pm

Hi Giulio

I thought those surfaces are easy surfaces but using simple rebuildsrf doesnt work here, also isotrim etc. Whey you say to reconstruct as a single NURBS surface you mean to convert tspline surface to nurbs? I connected tspline srf to grasshopper and it seems to read it quite well.

Thanks

Marietta

Permalink Reply by Giulio Piacentino on October 9, 2014 at 9:05am

Hi Marietta,

I had not opened the file before, just seen the picture. In fact, it does not seem a very symmetrical object that can be easily transformed into a single patch.

I've continued editing your mesh and used a couple of Weaverbird commands for this. It seems to work in the direction that you ask. I did not use Grasshopper for simplicity, although Weaverbird is available there, too.

You can of course improve the starting mesh, and any step in-between, but this should show a reasonable way to get to a result similar to what you seem to seek.

I hope this helps,

Giulio

--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Permalink Reply by Giulio Piacentino on October 9, 2014 at 9:06am

And the file.

Attachments:

• 141001-2.3dm, 749 KB

Permalink Reply by Blisza on October 9, 2014 at 1:53pm

This is really great, I was trying to simplify this surface in grasshopper without good results, but as I see transforming mesh in rhino with wb did the job. You're right this surface is a little bit problematic and unusual but now with reconstructed mesh it will work better with gh. Now i will continue to work on that mesh and transform it further.

Both wbmidedge and wbcatmullclarc works great with remeshing, but the wbmidedge division is what I wanted to achieve.  Hope I will show the end results of this surface soon. Thanks a lot!

Marietta

Permalink Reply by Giulio Piacentino on October 10, 2014 at 12:49am

Btw, in the example I've also used wbLaplacian in between with surface constraint and fixed edge to smoothen the interior of the mesh a bit.

Giulio

--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com