[geos-devel] [GEOS] #588: valid polygon when cw, not valid when ccw

[Sandro Santilli]

On Wed, Sep 12, 2012 at 08:43:51PM -0700, Martin Davis wrote:
> Turns out that this isn't an issue in the trunk version of JTS (but
> it is in JST 1.12).
> 
> This is probably due to the recent switch to using extended
> precision to compute determinant signs - which affects all
> intersection computations.  It would be good if GEOS switched to
> using this new more (fully?) robust technique as well.

Are you referring to this commit ?
http://jts-topo-suite.svn.sourceforge.net/viewvc/jts-topo-suite/trunk/jts/java/src/com/vividsolutions/jts/algorithm/CGAlgorithms.java?r1=652&r2=651&pathrev=652

Or which other  else ?

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