My question is: what is the best way to go, in order to “clean up” the mesh to get planar faces as “walls, columns” etc., non triangulated, sketchup-like. I would like to preceed this mesh such, so I can convert it to geometry, with wich I can work in SketchUp. Also I need to separate interior objects from this mesh - all furniture, statues, altars etc (it’s a church).
Please dont tell me, the only way is to do it manually - “redraw” it from sections of this mesh etc.
It was created probably from point cloud, IDK - I got only this .obj file - it’s one mesh, everything welded together, so cannot easy remove the pews and so on.
The final goal in sketchup is to be able to “work” in interior - creating scenes for visualisations, applying materials (I need planar walls), adding new furniture, lights etc. Also to produce elevations, sections via Layout.
If you really want to do it, the process required is called Segmentation. You’ll start by extracting planar areas which you then can fit planar surfaces to:
_ExtractConnectedMeshFaces, pick triangle on any wall, adjust angle, extract…
_From the resulting mesh, get the points using _ExtractPt
With the points selected, run _PlaneThroughPt to get a plane surface
repeat the process with the most required walls, roof, floor etc. then extend the plane surfaces if required so they enclose one volume. Once this is done you can use _CreateSolid to built a polysurface. Next fix each surface in the polysurface to get proper isocurve alignment. Then do the details like windows etc. This is the most “automated” way to go in Rhino apart from just re-drawing it “manually” by creating important sections, cleaning them and then using _ExtrudeCrv and snapping to the existing vertices in the mesh…it sounds tedious but will get you the best results.