[cad-linux-dev] Re: image and viewport entities
- From: bruno@xxxxxxxxxx
- To: cad-linux-dev@xxxxxxxxxxxxx
- Date: Sat, 28 Aug 2004 15:40:14 +0100
On Fri, Aug 27, 2004 at 03:10:13PM -0500, Eric Wilhelm wrote:
>
> Do we have a "blocks/" directory that these live in? Seems that it
> would work the best, since you might need a block named "headers" or
> something.
Put them wherever you like, if they are referenced by file-paths they can
live anywhere - This is a matter for your import program.
Users who are using the format directly might want to create categories of
blocks:
./things/furniture/chairs/dining/
..whereas a drawing imported directly from AutoCAD might have blocks that
look like this:
./blocks/001/
> >- symbol: same as a block
>
> Okay, why are they called two things?
Block is an 'AutoCAD-ism', in most CAD packages the same thing is called
a 'symbol' or a 'group'.
> >- xref: a reference to a drawing outside of the current directory
>
> Right, but it would be good to be able to package these into the
> drawing.
The point about an xref is that it _is_ an external drawing.
> >- image: a block containing an image file
>
> This should just point to the image filename.
Why? when it would be simpler to render an image-file into a drawing
in exactly the same way as any other entity.
If you are worried about round-tripping from AutoCAD and back, you can
leave hints such as putting them all in an 'images/' sub-directory.
> >- viewport: a reference to a drawing + a boundary
>
> This brings up the issue of model/paper space again. If you convert a
> dwg file with 5 layouts to rhizopod, do we need 6 directories?
5 sub-directories, it doesn't matter where. In the top-level directory
you have 5 'print' elements pointing to each in turn.
--
Bruno
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