Hi Martin,
Normalizing works fine - every time it generates exactly same output
(from the same input).
Thanks,
Janusz 

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Martin
Davis
Sent: Friday, June 05, 2009 1:54 AM
To: JTS Topology Suite Development
Subject: Re: [jts-devel] Polygonizer not symetric?

Well, this was never a design constraint on the Polygonizer, so this is
neither a feature nor a bug. It is a bit surprising, however - I think
all the code in the Polygonizer is deterministic, so the output should
be identical for identical input.

If you want a consistent ordering you can always normalize the output
geometries and then sort them.

If you provide a test program exhibiting the behaviour I can try and see
what might be causing this behaviour.

Janusz Dalecki wrote:
>
> Hi,
>
> I am surprised that the Polygonizer does not return Polygons in the 
> same order every time I make a call to getPolygons method, although I 
> am passing the same MultiLineString to the function add() - is this a 
> feature or bug.
>
> I am not sure whether this is correct forum for JTS questions.
>
> Regards,
>
> Janusz
> ----------------------------------------------------------------------
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--
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022

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