[cad-linux] Re: database cad system
- From: Bruno Postle <bruno@xxxxxxxxxx>
- To: CAD Linux list <cad-linux@xxxxxxxxxxxxx>
- Date: Tue, 24 Jun 2003 12:22:07 +0100
On Sun 22-Jun-2003 at 01:16:07AM -0500, Eric Wilhelm wrote:
>
> More of this for anyone that has been missing it:
I'm new to this list, so apologies if I'm going to repeat stuff
that's been said before..
> I've been crazy busy with work and it looks like I will continue
> this way for quite some time now but I think I will be working
> toward the database-connected cad system on future projects.
What problems are you trying to solve with a database?
CAD information doesn't appear to be a good fit; drawings are
generally made up of quite complex nested object information - This
kind of data is hard to cram into a relational database.
A relational database is good for fast searches and random access to
data - Neither of which are going to be particularly useful here.
> It looks like the networked database would be the way to set this
> up in future projects, except for the problem that everything
> graphical is so mired in autocad and file-based methodology.
I share your frustration with the existing "stuff everything in a
big binary file" strategy adopted by AutoCAD; but if you are not
careful, you will just end-up recreating this with MySQL (which also
stuffs everything in big binary files).
Looking from my perspective, CAD data isn't repetitive information
like an address-book; a closer analogy is with software source-code,
where duplication is a Bad Thing - You wouldn't dream of putting
your source into a database would you?
> I'm planning to look into openCascade in the near future, but the
> first step will be getting the perl wrapper for the dwg toolkit
> released.
Oo, yes please, I could think of lots of uses for this wrapper.
--
Bruno
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