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

[GEOS]

#588: [JTS fixed] valid polygon when cw, not valid when ccw
------------------------+---------------------------
 Reporter:  olivier80   |       Owner:  geos-devel@…
     Type:  defect      |      Status:  new
 Priority:  major       |   Milestone:  3.6.0
Component:  Default     |     Version:  3.3.5
 Severity:  Unassigned  |  Resolution:
 Keywords:  jtsfail     |
------------------------+---------------------------
Changes (by robe):

 * milestone:  3.5.0 => 3.6.0


Comment:

 still a problem: (tested on 3.5.0dev r4057)

 {{{
 SELECT ST_Isvalid('POLYGON ((
 -86.3958130146539250 114.3482370100377900,
 55.7321237336437390 -44.8146215164960250,
 87.9271046586986810 -10.5302909001479530,
 87.9271046586986810 -10.5302909001479570,
 138.3490775437400700 43.1639042523018260,
 64.7285128575111490 156.9678884302379600,
 -86.3958130146539250 114.3482370100377900))'::geometry);

 NOTICE:  Self-intersection at or near point 87.927104658698681
 -10.530290900147953
 }}}

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Ticket URL: <https://trac.osgeo.org/geos/ticket/588#comment:10>
GEOS <http://trac.osgeo.org/geos>
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).