Re: gEDA-user: Commercial CAD, land pattern generators report

[Dave N6NZ <n6nz@xxxxxxxx>]

On Aug 13, 2010, at 12:51 PM, Felipe De la Puente Christen wrote:

> On Fri, 2010-08-13 at 11:21 -0700, Dave N6NZ wrote:
> 
>> 
>> I've been watching FOSS 3D CAD for a while, and until FreeCAD came along the outlook was pretty depressing.  The FreeCAD guys, however, are making progress a bullet-train speed.  My first instinct would be to find a way to help them.
>> 
>> -dave
>> 

<snip>

> 
> According to my Aerspace related partners, DXF has almost nothing to
> apport to 3D CAD.
> 

Yes, well, I can't imagine using dxf for any serious 3D work.  But it does have 3D entities in the file format.  My earlier comments w.r.t. a dxf i/o library reflect both of those statements. :)

I don't know much about 3D file formats.  I know stl is basically a bag of triangles, and I think stl is also.  So while you can communicate a hull, you can't do much more. No parametric information, no material information, no joint information, etc.  Not sure about iges, I know pretty much nothing about it.

-dave



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