mainLibreDWG - Summary

 
 
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Id: #10374
System Name: libredwg
Name: LibreDWG
Group Type: Official GNU software

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This project is part of the GNU Project.

This website is mostly intended for developers and maintainers. For general information on the project, please check http://www.gnu.org/software/libredwg.

If you're looking for information on how to contribute, check the hackers' wiki at http://groups.fsf.org/wiki/LibreDWG.

LibreDWG was based on LibDWG (http://libdwg.sourceforge.net), which is written with variable names, documentation and comments in Esperanto.

There are also cmdline tools and libraries to read and write DWG files, with converters for various formats: DXF, DXFB, SVG, PS, JSON, XML, ....
and a SaveAs functionality, to convert between the various DWG versions.
It can read r13-r2018 DWG, write r13-r2000 DWG, write r11-r2018 DXF ascii and binary. Much more object types than any other free DWG library.

Registration Date: Sat 24 Oct 2009 10:23:48 PM UTC
License: GNU General Public License v3 or later
Development Status: 3 - Alpha

 

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Revealing unknown DWG classes
     posted by reini_urban, Fri 13 Jul 2018 10:11:01 PM UTC - 0 replies

I implemented three major buzzwords today in some trivial ways.

  • massive parallel processing
  • asynchronous processing
  • machine-learning: a self-improving program

The problem is mostly trivial, and the solutions also. I need to
reverse-engineer a binary closed file-format, but got some hints from ...


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Major speedup for big DWG's
     posted by reini_urban, Mon 11 Jun 2018 06:15:49 PM UTC - 0 replies

Thanks to David Bender and James Michael DuPont for convincing me that we need a hash table for really big DWGs. I got a DWG example with 42MB, which needed 2m to process and then 3m to free the dwg struct. I also had to fix a couple of internal problems. ...


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Enabled r2018 support
     posted by reini_urban, Mon 04 Jun 2018 08:40:47 AM UTC - 0 replies

I finished now reading the remaining DWG formats r2010, r2013 and r2018.
The only DWG read limitations are now:

  • pre-R13: some entities, all blocks
  • r2010+ Some AEC EED (Autodesk Architectural Desktop) objects.
  • Untested: FIELDLIST, AcDbField, TABLECONTENT, TABLEGEOMETRY, GEODATA, WIPEOUTVARIABLE ...

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