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Subject:	Re: [geda-user] 3D modelling and gEDA
From:	Edward Hennessy <ehennes AT sbcglobal DOT net>
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Date:	Wed, 19 Jun 2013 19:22:31 -0700
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On Jun 15, 2013, at 1:56 PM, Peter Clifton <pcjc2 AT cam DOT ac DOT uk> wrote:
> On Sat, 2013-06-15 at 02:03 -0400, Evan Foss wrote:
>> 
>> IGES/STEP would have been better because they uses cubic splines. This
>> same functionality is available in Eagle right now using google
>> Sketchup. I know that is based on COLLADA which I think is also not
>> based on BOT.
> 
> Yes, but 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.
> 
> The machine-readable format validation file for STEP AP-214 (EXPRESS
> schema) runs to 18,000 lines!
> 
> AP-203 is simpler, but still 5347 lines of schema.
> 

Does anyone have experience with the IDF format?

Cheers,
Ed

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