[cad-linux] Re: database cad system
- From: Jim Parker <hopeye@xxxxxxxxxx>
- To: cad-linux@xxxxxxxxxxxxx
- Date: Tue, 24 Jun 2003 08:19:01 -0400
I have to disagree. After working on GtkCAD for way too long, SQL
databases are a great fit for my data format.
Of course what I store is vertex information, plus the methods used to
connect the dots. No binary data. And the CAD program has to take the
data and draw to the screen.
Cheers,
Jim Parker
On 2003.06.24 07:22 Bruno Postle wrote:
> 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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