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Date:	Tue, 5 Jan 2016 14:02:19 +0100
From:	"Peter Stuge (peter AT stuge DOT se) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Subject:	Re: [geda-user] Merging stuff. How to make it happen
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gedau AT igor2 DOT repo DOT hu wrote:
> assume signed 32 bit coords, you get about 2.1 meters as max board size.
> Now look at rubber_callback(): at some point it does an x*=x.

The solution (in true fixed point manner) is to first x >>= 8*sizeof x/2;


> I think it's reasonable to create a centralized, generic 
> (non-pcb-complex-type-oriented) geometry lib

Yes, this is a major point on my wishlist.


Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> Regarding geometric libraries http://www.cgal.org has an impressive
> developers list.

I looked at CGAL when it was previously proposed as a candidate, but
I don't think it is what we need, because it is way too large and (less
important, but still) C++.


> Stephan Böttcher brought up clipper http://angusj.com/delphi/clipper.php
> a short while ago and started to write on a gerber file clearance checker
> http://www.psjt.org/code/drc/screenshot.png, have the project here
> http://www.psjt.org/code/

I don't know clipper - I will take a look at that. Thanks!


//Peter

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