> Thanks for your offer! > >I’m currently using some repair tools to repair certain types of issues as part of diagnosing why OpenSCAD >won’t import certain types of files. >I’m struggling with one particular user-submitted design: > >Original: http://www.thingiverse.com/thing:81182/#files >Fixed by Netfabb: http://www.thingiverse.com/thing:131701/#files > >The fixed design still doesn’t import into OpenSCAD because it contains “zero triangles”, i.e. triangles where >all vertices lie on the same line, meaning it doesn’t have area and thus no normal vector. > >MeshLab can fix this using Filters->Cleaning and Repairing->Remove T-vertices by EdgeFlip >However, MeshLab crashes when trying to repair this model. > >Does your software have such a feature? If so, it would be cool if you could give it a spin. >The goal would be to get this to render in OpenSCAD, and understand what had to be fixed to make this work: > >import( "actual_tardis.stl" ); >translate( [ -100, -100, 0 ] ) cube( [ 200, 200, 0.5 ] ); > >Cheers, > > -Marius Marius, I re-noticed the above in the other tread & didn't want to hijack it. Some time ago I fixed actual_tardis by running it thru the NetFabb cloud (the NetFabb Basic couldn't fix it). I put it up in thingiverse here http://www.thingiverse.com/thing:131701 I just imported it and it compiled and rendered and exported. I then tried your two line program and it compiled, but render got Compiling design (CSG Tree generation)... Rendering Polygon Mesh using CGAL... ERROR: CGAL error in CGAL_Nef_polyhedron3(): CGAL ERROR: assertion violation! Expr: e->incident_sface() != SFace_const_handle() File: /data/OpenSCAD/libraries-mingw64-master/mxe-w64/usr/x86_64-w64-mingw32.static/include/CGAL/Nef_S2/SM_const_decorator.h Line: 326 Geometries in cache: 3 Geometry cache size in bytes: 9821376 CGAL Polyhedrons in cache: 1 CGAL cache size in bytes: 11104 Total rendering time: 0 hours, 0 minutes, 16 seconds Top level object is a 3D object: Simple: yes Vertices: 8 Halfedges: 24 Edges: 12 Halffacets: 12 Facets: 6 Volumes: 2 Rendering finished. I then looked closer in NetFabb, it passes the normal checks, but I noticed it had 34 shells, and the detect self intersections found a good number in the text and St John badge. Unfortunately Netfabb Basic does't fix those. The fixed one has been printed a number of times, so slicers don't have a problem. Anyway, I thought this may help in your quest. ----- Unless specifically shown otherwise above, my contribution is in the Public Domain; To the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. This work is published globally via the internet. :) Inclusion of works of previous authors is not included in the above. The TPP is no simple “trade agreement.” Fight it! http://www.ourfairdeal.org/ -- View this message in context: http://forum.openscad.org/Fixing-stl-tardis-tp11873.html Sent from the OpenSCAD mailing list archive at Nabble.com.