Hello,
I’m looking at the OpenNurbs SDK for Rhino6, and I was wondering if there was any examples showing how to convert breps, surfaces, etc… to a triangular mesh? Without using OpenGL?
Basically, I just want to convert everything in a .3dm file to a mesh, without much hassle, using the SDK.
Thanks
Hi @samurle,
If you are using the Rhino C++ SDK, then you might consider using the RhinoMeshObjects function.
You can also use ON_Brep::CreateMesh. The function above calls this.
There are couple examples of it’s using in the Rhino developer samples repo on GitHub
– Dale
My mistake, I’m using the OpenNurbs SDK for Rhino 6.
Are there any examples that show mesh conversion as a stand-alone app?
I see some conversion routines in opennurbs_gl.cpp, but that’s dependent on OpenGL.
Hi @samurle,
Standalone openNURBS will not create meshes from surfaces or polysurfaces.
However, if the model is saved with render meshes, then you can read them.
– Dale
Thank you very much, will try it.
Hello,
One quick question. How are render meshes generated? Are they automatically generated on .3dm export from Rhino?
For example, I’ve exported a simple extrusion object to .3dm file, however m_mesh_cache.Mesh() is returning NULL. The extrusion object does exist though.
I also tested a simple brep object. GetMesh() returns NULL, but m_F.Count() does return a valid value.
In general, render meshes are created when you set a viewport to Shaded or Rendered display.
Even with this, you can purge a 3dm file by using the SaveSmall command.
– Dale