I am using Rhino for quite a while, however so far just for simple volume modeling and .stl export for micromachinig.
Now I have a new task where I got a little bit stuck and need some help. I want to model the differene volume between measured 3D topography data (stl or polygonmesh) and an (ideal) volume model which can be stl-Data or a volume model in Rhino. For testing I designed a cone and a little bit deformed cone like surface in rhino, exported both to .stl and reimported the data. My approach was to rebuild volume models out of the .stl data (conversion to NURBS) and perform a boolean difference.
As I found out in this forum this makes not so much sense as rhino models volumes as objects with boundaries and not like filled volumes with voxels. All my tests lead to a not working boolean difference.
So I am now asking myself if Rhino is the right tool for this operation and if yes how I can move on? I guess this is not such a simple task, this is why I need some help to find the right approach.
Thanks for your help.