Thank you for answering me
I believe that I have tried to hard to be simple in my phrasing and failed.
I’m trying to find a simpler way of doing something which the is commonly done by remodeling geometry: 3D printing with an FDM machine from Revit.
This is a model from Revit of a building. The building has interior walls and objects. Unfortunately, the interior walls have the same identity as the exterior and cannot be removed simply by that. Same goes for many doors with exist both on the outside and inside. Etc.
The pipeline (at the moment, I’m experimenting) goes: Revit>DWG>Rhino>Explode>Many surfaces>Finding a smart way of eliminating all surfaces which are on the inside>Export as OBJ>Import to 3D Builder>Join>Export as STL>Into slizer and check
(Since the DWG from Revit are some nice solid polysrfs I’ve tried to booljoin them, but some are slightly corrupt and fail the operation.)
Essentially what I’m trying to do is a simple way of finding which surfaces/meshes/what have you (depends on what you convert the model to in Rhino/GH) are the most outwards facing (relative to what… I know).
I’m trying to find a simple enough way of doing it through analysis and not have to remove all interior objects by hand. In the end to create something close to a solid polysrf which is a shell representation of a building, no wall thicknesses or such needed, the fdm-slizer will offsett all geo inwards.
In the end, I’ll try to create a pipeline from Revit to 3D printing (basic fdm machine) which is quicker than doing everything by hand. Might need to do a little bit by hand, but 1 hour is more ok than 8hrs.
A thought was if you could analyse what’s inside and outside depending on whether it receives light or not. Very simple, as if rendered or analyzed with sunlight-hours. This seems to be a rule which could apply to many such cases. I’ve googled my way through many other creative rules, but they have a hard time catering to all needs.
I’m not looking for a script or a quick fix, mostly a dialog of whether or not we can use such data to find inside/outside. Most other rules have too many exceptions. Just like the Revit files to begin with.
Happy holidays :)!