[cad-linux] Re: An open CAD file format
- From: Alvin Oga <alvin@xxxxxxxxxxxxxxxxxxxxxxxxx>
- To: CAD Linux list <cad-linux@xxxxxxxxxxxxx>
- Date: Sat, 6 Sep 2003 16:29:09 -0700 (PDT)
On Sat, 6 Sep 2003, Bruno Postle wrote:
> Hi list,
>
> I've long since been dissatisfied with existing CAD software, in
> particular, the file formats they've produced tend to annoy with
> their inflexibility.
>
> So I've been working on devising a text-based CAD file format that
> is easy to manipulate with simple tools, the really interesting part
> is that it has a number of very cool features that would otherwise
> have to be implemented with difficulty at the application-level:
>
> * Crash resistant data format.
>
> * Object-oriented xrefs/blocks/symbols with multiple inheritance, aggregation
> and polymorphism.
must be able to break the symbols and block into individual components
and modify it into new-block and move "new-block" as whole
> * Multiple users can edit the same data at the same time.
good thing for *nix that it can be done
lots o version control fun
> * Infinite undo.
infinite "redo" also even without the skipped over mistakes
so that you dont have to fix/redo the correct stuff that was
undone during the undo
> * Diff and patch friendly.
>
> * Release tagging, development branching and versioning.
a biggie ... and everybody has their own version control
that spans 10-20 years of their products
> * Other stuff too, the format is extremely extensible.
api to import xyz formats
-- add additional data that was missing in "xyz" format
api to export in abc output for sheetmetal, documentation, in-house
requirements
easy point-n-click interface to create/edit drawings
- if some one is able to use ijkl interface ( cad app )
they should be able to use those keystrokes
response time for doing a simple dwg vs a 1000 page interrelated
dwg should be roughly the same
===
=== same theory/implementaion can also be used for electrical dwgs too
===
fun stuff ...
have fun
alvin
> This isn't just hot-air, I've written a tiny proof-of-concept
> application that can be used to demonstrate all of this:
>
> http://bugbear.blackfish.org.uk/~bruno/draft/
>
> I'd be interested to hear any comments.
>
> --
> Bruno
>
>
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