[cad-linux-dev] uber-converter status
- From: Eric Wilhelm <ewilhelm@xxxxxxxxxxxxx>
- To: cad-linux-dev@xxxxxxxxxxxxx
- Date: Sat, 25 Sep 2004 12:36:08 -0500
Things are coming along here. The dxf2rhizopod.py program is mostly
functional, as is the pythoncad2rhizopod.py. Going the other
direction with dxf is going to take some work still. Getting
rhizopod2pythoncad working is just a matter of writing the stream
input code.
There is support for 3D dxf as well. Transforming these entities into
python/svg/ps is likely going to take a 'flattenner' filter. I was
hoping to find some already-written python code in Blender for
handling the OCS<->WCS transform, but no luck. So, after adding
dot(), proj(), and comp() support to Scientific.Geometry.Vector (and
then getting bounced by the author's mailserver), I translated my
functions from CAD::Drawing::Calculate into python.
If you want to play with this stuff, there are instructions in the
subversion repository on how to get it and perform a pseudo-install.
See the download section of the main page.
http://ericwilhelm.homeip.net/uber-converter/
The monolithic-format connectors are changing into stream filters.
The directory stuff is all handled by the rhizopod_stream and
rhizopod_unstream programs. The latter is ripe for improvements
related to the persistence of a directory, since it currently
requires permission to smash the destination.
Anybody want to code the dxf-write module? Or, for that matter, any
other connector your heart desires.
Additionally, dealing with dxf text is going to be tricky if the text
is anything but left-justified. The "insert point" is always the
bottom-left corner (which is different than the "grip" that you see
when running autocad.) If anyone knows how to handle the various
font-width issues, let me know. Maybe there's something in qcad that
addresses it.
Aside about Blender: The dxf import code is some 1500 lines of C with
a comment in the middle about how it needs to be rewritten. So, once
dxf2rhizopod is solid, it would be great to write a python import
script to pull any rhizopod-connected format into Blender. Janek is
planning to experiment with read/write connection to the actual
directory, but a straight-import is a little simpler.
--Eric
--
"Matter will be damaged in direct proportion to its value."
--Murphy's Constant
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