[geos-devel] [GEOS] #591: Port robust determinant fixes from JTS

GEOS geos-trac at osgeo.org
Fri Nov 28 05:15:43 PST 2014

#591: Port robust determinant fixes from JTS
 Reporter:  strk        |       Owner:  geos-devel@…              
     Type:  defect      |      Status:  new                       
 Priority:  major       |   Milestone:  3.5.0                     
Component:  Default     |     Version:  3.3.5                     
 Severity:  Unassigned  |    Keywords:                            

Comment(by mloskot):

 Replying to [comment:9 strk]:
 > XML can request fixed precision (check PrecisionModel tag).

 I declare FLOATING first.

 > Also the WKB vs. WKT seem important to me

 Yes, certainly.
 But, if JTS does not test such cases with binary-based representation of
 geometries, then the robust determinant computation in JTS may still be
 missing to capture such cases properly.

 I will have to try JTS with the WKB input and see if the `DoubleDouble`
 based `CGAlgorithmsDD::orientationIndex` can handle those cases indeed.

Ticket URL: <http://trac.osgeo.org/geos/ticket/591#comment:10>
GEOS <http://geos.refractions.net/>
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).

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