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From: Markus Hitter <mah AT jump-ing DOT de>
Subject: Re: [geda-user] 3D modelling and gEDA
Date: Sun, 16 Jun 2013 13:05:08 +0200
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Am 15.06.2013 um 22:56 schrieb Peter Clifton:

> the above three mentioned formats are incredibly complex
> (especially STEP). I would estimate tens of thousands of lines of code
> go into a STEP -> object structure parser, and that's only the  
> beginning
> of using the format.

These lines of code are already written, see OpenCascade.

But you're right. 3D modeling capabilities are a huuuuge effort,  
likely a lot more than what PCB already has. I'd guess equipping a 3D  
modeler -OpenSCAD or FreeCAD- with pcb layout functionality -quick  
track drawing, connection checking, rat lines drawing, etc.- would be  
a lot less effort than the other way around.

STL is a very simple format and because of this, it's very  
successful. It's meant to be a downstream format, used for forwarding  
just surface data to e.g. milling, rendering or FEA analyses. It also  
has a successor, AMF. AMF deals a lot better with curved surfaces and  
allows coloring. As a standard, AMF is young, code libraries are just  
emerging.


Markus

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Dipl. Ing. (FH) Markus Hitter
http://www.jump-ing.de/