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	Sun, 25 Oct 2015 12:12:29 -0700 (PDT)
Date:	Sun, 25 Oct 2015 11:12:29 -0800
Message-ID:	<CAC4O8c8xg5KV23qEcKwyj=xu+eZxTbWkhCkhcdfQZ8HWcptRGg@mail.gmail.com>
Subject:	[geda-user] time for geometry.h
From:	"Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Reply-To:	geda-user AT delorie DOT com

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The geometry code in search.c and find.c is messy.  There's no geometrical
abstraction and everything is done from ad-hoc calculations off the traces
themselves.  There are bugs.

I'd like to add a module that does simple 2D geometry, e.g. Vec Line
LineSec Circle Ellipse Arc etc. as purely geometrical objects.

Igor I think you're doing similar stuff perhaps we could coordinate.

The alternative would be to use some existing geometry library e.g. CGAL,
Gemotry Engine, GEOS.
They are arguably much more than needed but on the other hand Stephan's
toporouter already needs something like that anyway.

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<div dir=3D"ltr"><br><div style=3D"">The geometry code in search.c and find=
.c is messy.=C2=A0 There&#39;s no geometrical abstraction and everything is=
 done from ad-hoc calculations off the traces themselves.=C2=A0 There are b=
ugs.</div><div style=3D""><br></div><div style=3D"">I&#39;d like to add a m=
odule that does simple 2D geometry, e.g. Vec Line LineSec Circle Ellipse Ar=
c etc. as purely geometrical objects.</div><div style=3D""><br></div><div s=
tyle=3D"">Igor I think you&#39;re doing similar stuff perhaps we could coor=
dinate.</div><div style=3D""><br></div><div style=3D"">The alternative woul=
d be to use some existing geometry library e.g. CGAL, Gemotry Engine, GEOS.=
=C2=A0</div><div style=3D"">They are arguably much more than needed but on =
the other hand Stephan&#39;s toporouter already needs something like that a=
nyway.</div></div>

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