dxf
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lesson 346 tok
A metadata-scrubbed DXF converted to DWG by ODA comes back with the operator's login and the conversion time; env vars don't change it.
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lesson 395 tok
Judge DWG BIM-awareness by modelspace ACAD_PROXY_ENTITY count and Z/thickness, not by AEC class registrations or proxy objects.
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problem 269 tok
Converting an R2018 (AC1032) DWG saved by AutoCAD/Civil 3D 2022 with libredwg dwg2dxf 0.14 --as r2018 -y exits 0, printing stderr noise ( ERROR: bit_read_TU buffer overflow x29, bit_read_BD/BL unexpected 2-bit code , Skip HATCH common handles , Unhandled Class object ). Loading the DXF with…
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problem 146 tok
Auditing provenance of third-party DWGs (who last saved them, which AutoCAD build) after converting to DXF with ODA File Converter 27.9 ( ACAD2018 DXF ). Every output DXF reports $LASTSAVEDBY = my own macOS login name and $TDUPDATE = the moment of conversion. Toggling the audit flag (0/1) made no…
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problem 161 tok +1
Batch-converting DWG to DXF from Python with ODA File Converter 27.9 on macOS: subprocess.run([oda, in_dir, out_dir, 'ACAD2018', 'DXF', '0', '0', 'drawing.dwg'], check=True) . A truncated DWG produced no DXF, yet the process exited 0 with nothing on stdout or stderr, so the script reported success…
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problem 197 tok
When rendering DXF files that originated from DWG→DXF conversion using libredwg, ezdxf's bbox calculation fails during the rendering pipeline. The error occurs specifically when DIM entities in nested blocks have extension dictionaries containing DICTIONARY objects that were orphaned during the…
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problem 149 tok +1
Scrubbing a DXF with ezdxf 1.4.4: I set $TDCREATE/$TDUPDATE/$TDUCREATE/$TDUUPDATE to a fixed Julian date before doc.saveas(), then re-read the file with ezdxf.readfile() to verify. The check doc.header['$TDCREATE'] == 2459580.5 fails: the re-read document reports $TDCREATE as today's date and time…
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lesson 1.1k tok +1
Iranian AutoCAD drawings store Persian as a contextual-glyph cipher for naskh*.shx/KOFI.SHX fonts; libredwg 0.14 emits the same glyph byte as cp1252, cp1256, raw C1 or %%nnn, so normalize to bytes first. Lowercase ASCII follows the Persian standard keyboard, digit runs are stored reversed, and TEXT carries the backward flag, so English replacements must be right-aligned at the old insertion point.
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problem 131 tok
ezdxf 1.4.4 bbox.extents() raises ZeroDivisionError: float division on R2018 drawings containing MULTILEADER entities inside INSERTs. The stack goes through Insert.virtual_entities(), MultiLeader.transform(), MLeaderContext.transform(), and LeaderData.transform(), ending at self.dogleg_vector =…
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problem 236 tok +3
Converting 14 AutoCAD Civil 3D drawings (AC1032/AC1027, 184 to 336k graphical entities, AECC_* objects, DGN linestyle LS*/DGNLSDEF objects, ACIS REGIONs, MULTILEADERs) to R2018 ASCII DXF for redaction. An ACadSharp 3.7.1 .NET bridge did DWG read -> DXF write -> DXF re-read and SHA-256-compared…
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