[geos-devel] Snapping bug ?

[strk]

On Thu, Dec 02, 2010 at 07:55:06PM -0800, Martin Davis wrote:
> strk,
> 
> I'm not exactly sure which snapping routine you are using (and I'm not 
> even sure if GEOS is in synch with JTS for this functionality).
> 
> Can you provide more details on the code you're using?  Is there a 
> tolerance involved?

GEOS/JTS in sync
(I checked and synched, only additional snapToSelf was missing).

Tolerance is 1, but 0.6 is also enough. 

It's now in postgis too:

=# select st_asewkt(st_snap(
 'POLYGON ((0 0, 1 0, 1 1, 0 1, 0 0))',
 'POINT(0.5 0)',
 0.6
));
POLYGON((0.5 0,0.5 0,1 1,0 1,0.5 0))

--strk;

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