One of the reasons for picking up Rhino and subsequently Grasshopper was a desire to create patterns and details on top of surface geometry. I’m almost always importing STEP / IGES geometry into Rhino and then trying to work with those surfaces. So here’s an example of a simple imported part:
My goal here would be to create some kind of pattern over this polysurface. However the trouble I’m running into is:
1.) Using Rhino tools like Flow Along Surface etc. only seems to work on a surface, not on polysurfaces. So achieving any kind of uniform pattern distribution over this surface seems tricky.
2.) Using Grasshopper I’m struggling to get subdivsions of a polysurface. I can load the geometry into a BREP node etc. but then I run into the following issues:
I guess the question is: How do I treat a polysurface as a single surface in order to effectively create patterns and features over it.
Any suggestions on how to approach this?