Hello, I am working on a tool that reads Rhino SubD objects with Rhino3dmIO. I want to support Rhino’s new SubD object type however I don’t see that Rhino3dmIO exposes adequate methods for reading a SubD as either a Brep or Nurbs represenation. Furthermore, I don’t see that there is a way to get a…

@archinate1 I just released new versions of rhino3dm.py and rhino3dm.js last night that support subdivide and getControlNetMesh Here’s an example of how this can be used in javascript to create a mesh from a SubD mcneel/rview/blob/master/src/SceneUtilities.js#L318 dotDiv.style.backgrou…

Hey Nate, We definitely won’t be providing the ToBrep() function in Rhino3dm. That type of functionality will be available through compute. We’re discussing internally how to help with respect to getting meshes from SubD instances. If you need this immediately, I would recommend grabbing an off th…

[image] archinate1: I don’t see that there is a way to get a render mesh or other mesh from a SubD using OpenNURBs. We’re not going to give away our mesher for SubD that gets you a tight limit surface mesh, but we do give away what might be considered good enough. There are two OpenNURBS func…

Awesome! This will be very helpful.

@archinate1 - did you get a chance to test the new ToNurbs in Rhino? SubD Ship Hull Modeling I know it doesn’t fix your specific request here, but it does really change what is possible for freeform workflows for architects. Mesh > Quadremesh > subd > ToNurbs packed.

Hi @stevebaer , I am trying this out now with Rhino3dmIO - It looks like the new methods are exposed but I am having a bit of trouble finding my Rhino object containing the SubD in the Rhino file’s File3DMObjectTable like Breps, Extrusions, etc? In Rhino, have a SubD object created. When I retrieve …

Hi @archinate1 , The attached seem to to work. What are we missing? TestRead3dm.zip (83.6 KB) – Dale

Hi @dale It seems I had an old librhino3dmio_native.dll being copied over in my application. Totally my fault. It’s all up and running now. Thank you for the assist. -Nate

Whew; thanks for letting us know

Hi! Same question, What “ON_SubD::BrepForm” does? is it the method for convert subd to nurbs? and i tried this function but it doesn`t work. “”" ON_Brep brep; subd->BrepForm(&brep); std::cout << “faces: " << brep.m_F.Count() << std::endl; // it always get me 0 “”” “”" std::cout << “faces:…

This has been answered. [image] Opennurbs convert subd to nurbs issue Rhino Developer i want to use opennurbs c++ to try to convert subd to nurbs, and the test code is following. and the subd->HasBrepForm() is false. What`s wrong with it? Does opennurbs has the function…

Rhino3dmIO, openNURBS Support for SubD to Brep, Nurbs, or Mesh?

openNURBS

dale (Dale Fugier) November 11, 2020, 8:26pm 12

This has been answered.

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Rhino3dmIO, openNURBS Support for SubD to Brep, Nurbs, or Mesh?

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