Cannot join MeshtoNurbs surfaces

CADmapper-Topo-sample.3dm (3.6 MB)


Hi Rhino community,
I had this mesh surface from Cadmapper that I want to transform into a polysurface. No matter how I try to clean the mesh, it all becomes kind of a group of smaller polysurfaces that if I explode, they’ll become tiny pieces.
My goal is when I cut a section, I won’t see those tiny squares.

Thanks for your help.

Hi @nxduyquang9
There’s a couple of ways (at least) to ge there:
A

  1. Convert the mesh to Sub-D using the ToSubD command
  2. Convert the resulting Sub-D to NURBS using the ToNURBS command

B

  1. Use the Patch command, making sure that you use sufficient spans to get the result as precise as you need it to be. You’ll probably need to re-trim the resulting pach surface to fit the exact size.

HTH, Jakob