“LibreCAD”的意思、由来-开放百科全书

LibreCAD was developed as a fork of QCad Community Edition. The GUI of LibreCAD is based on Qt5 libraries, so it runs on several platforms in the same way.^[3]^[4]

Most of the interface and handle concepts are analogous to AutoCAD, making it easier to use for users with experience of this type of commercial CAD application.

LibreCAD uses the AutoCAD DXF file format internally for import and save files, as well as allowing export to many other file formats.

GPLv3 vs GPLv2 controversy

As the GNU LibreDWG library is released under GPLv3 it can't be used by GPLv2 licensed LibreCAD (and FreeCAD)^[5]^[6] as their licenses are incompatible.^[7] A request also went to the FSF to relicense GNU LibreDWG as GPLv2, which was rejected.^[8] This controversy has been resolved by writing a new GPLv2 licensed library called libdxfrw,^[9] with more complete DWG support.

References

1. ^{{cite web|title=LibreCAD the only major free Computer Aided Design program|url=http://www.soft32.com/blog/platforms/windows/librecad-the-only-major-free-computer-aided-design-program/|accessdate=20 January 2013}}
2. ^{{cite web|last=Dube|first=Ryan|title=6 Tips To Get The Most Out of LibreCAD Free CAD Software|url=http://www.makeuseof.com/tag/5-tips-librecad-free-cad-software/|accessdate=20 January 2013}}
3. ^{{cite web|last=Wallen|first=Jack|title=DIY: LibreCAD offers basic CAD tools for free|url=http://www.techrepublic.com/blog/doityourself-it-guy/diy-librecad-offers-basic-cad-tools-for-free/1306|accessdate=20 January 2013}}
4. ^{{cite web|title=Review about Linux LibreCAD and Linux Inkscape |url=http://newsoftwarepc.com/review-about-linux-librecad-and-linux-inkscape.html |accessdate=20 January 2013 |deadurl=yes |archiveurl=https://web.archive.org/web/20121120014147/http://newsoftwarepc.com/review-about-linux-librecad-and-linux-inkscape.html |archivedate=20 November 2012 |df= }}
5. ^{{cite web|url=http://libregraphicsworld.org/blog/entry/whats-up-with-dwg-adoption-in-free-software |title=What's up with DWG adoption in free software? |last=Prokoudine |first=Alexandre |date=26 January 2012 |accessdate=3 November 2013 |trans-title=|publisher=libregraphicsworld.org |quote=[Assimp's Alexander Gessler:] "Personally, I'm extremely unhappy with their [LibreDWG's — LGW] GPL licensing. It prohibits its use in Assimp and for many other applications as well. I don't like dogmatic ideologies, and freeing software by force (as GPL/GNU does) is something I dislike in particular. It's fine for applications, because it doesn't hurt at this point, but, in my opinion, not for libraries that are designed to be used as freely as possible." [Blender's Toni Roosendaal:] "Blender is also still "GPLv2 or later". For the time being we stick to that, moving to GPL 3 has no evident benefits I know of. My advice for LibreDWG: if you make a library, choosing a widely compatible license (MIT, BSD, or LGPL) is a very positive choice." |deadurl=yes |archiveurl=https://web.archive.org/web/20161109103037/http://libregraphicsworld.org/blog/entry/whats-up-with-dwg-adoption-in-free-software |archivedate= 9 November 2016 |df= }}
6. ^{{cite web|url=https://www.phoronix.com/scan.php?page=news_item&px=MTI4Mjc |title=FSF Wastes Away Another "High Priority" Project |first=Michael |last=Larabel |date=2013-01-24 |publisher=Phoronix |accessdate=2013-08-22 |quote=Both LibreCAD and FreeCAD both want to use LibreDWG and have patches available for supporting the DWG file format library, but can't integrate them. The programs have dependencies on the popular GPLv2 license while the Free Software Foundation will only let LibreDWG be licensed for GPLv3 use, not GPLv2. |deadurl=yes |archiveurl=https://web.archive.org/web/20161109200145/https://www.phoronix.com/scan.php?page=news_item&px=MTI4Mjc |archivedate=2016-11-09 |df= }}
7. ^{{cite web| url=https://www.gnu.org/licenses/gpl-faq.html#v2v3Compatibility| title=Frequently Asked Questions about the GNU Licenses – Is GPLv3 compatible with GPLv2?| publisher=The official site| accessdate=13 April 2011}}
8. ^{{cite web|url=http://libregraphicsworld.org/blog/entry/libredwg-drama-the-end-or-the-new-beginning |title=LibreDWG drama: the end or the new beginning? |first=Alexandre |last=Prokoudine |date=2012-12-27 |quote=[...]the unfortunate situation with support for DWG files in free CAD software via LibreDWG. We feel, by now it ought to be closed. We have the final answer from FSF. [...] "We are not going to change the license." |accessdate=2013-08-23 |publisher=libregraphicsworld.org |deadurl=yes |archiveurl=https://web.archive.org/web/20161109103213/http://libregraphicsworld.org/blog/entry/libredwg-drama-the-end-or-the-new-beginning |archivedate=2016-11-09 |df= }}
9. ^libdxfrw on sourceforge.net

GPLv3 vs GPLv2 controversy

References

External links