About DWG and DXF (cad) file formats and applications
1 réponse
drf_alex
Hello, (1.st: sorry for my poor english -;)
I'am searching for a DWG and DXF parser written in C/C++.
[Q]: Are there any GPL (General Public License) projects which address
these proprietary, closed AutoCad file formats ?
It's quite irritating that AutoCad DWG file format is closed and mainly
unknown to developers and engineers. DXF is de-facto (AutoCad) drawing
standard and it's well known and documented. But DWG is not, even beeing
so dominant in CAD-world.
-----------
www.openDWG.org : (HARDLY OPEN ?)
I have just visited the www.openDWG.org, which claims to provide a
parser for AutoCad DWG and DXF files. The name "open" could imply that
the source code is avalable for download and review, but NO !! One has
to pay (quite a lot of money) to get hands on the source. Thou openDWG
provides binary libraries for various platforms.
Binary libraries are not a valid option for many - Developers need a
GPL'ed source.
And it seems that many volunteers contribute and do free TESTING for them.
openDWG.org should change their name to closedDWG and back off with
AutoDesk (acad) ! f'em really.
-----------
WE need a stronly GPL'ed CAD project which re-engineers and OPENs the
DWG-binary file format.
This project would be:
- GPL'ed C/C++ project, mainly developed on Linux.
(gradually ported to other OS'es)
It could comprise:
- Analyze and convert DWG and DXF (other important) file formats.
- Createa complete 2D/3D CAD drafting tool for architectual
and mechanical engineering.
- Gradually, it should understand the meaning of 'object' - not
just existence of simple lines, arcs and circles.
This kind of OpenCAD should read/write the most-important CAD formats,
but emphasize, point out open standards such as XML. So other tools can
make use of it's output.
[Q]: Are there anyone who would like to lead such a project?
I believe that many developers, designers, mathematicians etc. will like
to participate. I have no capacity or knowledge to lead such a project -
but I do really want to contribute and co-work.
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jg
"drf_alex" wrote in message news:KXL1b.23324$
Hello, (1.st: sorry for my poor english -;)
I'am searching for a DWG and DXF parser written in C/C++.
[Q]: Are there any GPL (General Public License) projects which address these proprietary, closed AutoCad file formats ?
It's quite irritating that AutoCad DWG file format is closed and mainly unknown to developers and engineers. DXF is de-facto (AutoCad) drawing standard and it's well known and documented. But DWG is not, even beeing so dominant in CAD-world.
...................
I agree with all you say, and Acad 2004 has a new dwg format which no one seems able to reverse at all. A big test for any cad is how well it reads acad, which limits its possibilities from the beginning. A universal standard would be great but I am no expert and don't expect something for nothing either. I would like to try using Linux (because I believe it performs better, not because of price) but no linux cad seems potentially able to fit into the dwg world easily - I might be wrong...
"drf_alex" <drf_alex@yahoo.se> wrote in message
news:KXL1b.23324$Hb.370654@news4.e.nsc.no...
Hello, (1.st: sorry for my poor english -;)
I'am searching for a DWG and DXF parser written in C/C++.
[Q]: Are there any GPL (General Public License) projects which address
these proprietary, closed AutoCad file formats ?
It's quite irritating that AutoCad DWG file format is closed and mainly
unknown to developers and engineers. DXF is de-facto (AutoCad) drawing
standard and it's well known and documented. But DWG is not, even beeing
so dominant in CAD-world.
...................
I agree with all you say, and Acad 2004 has a new dwg format which no one
seems able to reverse at all. A big test for any cad is how well it reads
acad, which limits its possibilities from the beginning. A universal
standard would be great but I am no expert and don't expect something for
nothing either. I would like to try using Linux (because I believe it
performs better, not because of price) but no linux cad seems potentially
able to fit into the dwg world easily - I might be wrong...
I'am searching for a DWG and DXF parser written in C/C++.
[Q]: Are there any GPL (General Public License) projects which address these proprietary, closed AutoCad file formats ?
It's quite irritating that AutoCad DWG file format is closed and mainly unknown to developers and engineers. DXF is de-facto (AutoCad) drawing standard and it's well known and documented. But DWG is not, even beeing so dominant in CAD-world.
...................
I agree with all you say, and Acad 2004 has a new dwg format which no one seems able to reverse at all. A big test for any cad is how well it reads acad, which limits its possibilities from the beginning. A universal standard would be great but I am no expert and don't expect something for nothing either. I would like to try using Linux (because I believe it performs better, not because of price) but no linux cad seems potentially able to fit into the dwg world easily - I might be wrong...
