[postgis-tickets] [PostGIS] #3056: Confusing results from ST_3DDistance

[PostGIS]

#3056: Confusing results from ST_3DDistance
----------------------+-----------------------------------------------------
  Reporter:  strk     |       Owner:  pramsey      
      Type:  defect   |      Status:  reopened     
  Priority:  medium   |   Milestone:  PostGIS 2.1.6
 Component:  postgis  |     Version:  2.1.x        
Resolution:           |    Keywords:               
----------------------+-----------------------------------------------------
Changes (by strk):

  * status:  closed => reopened
  * resolution:  fixed =>


Comment:

 sfcgal tests are failing:
 {{{
 --- sfcgal/measures_expected    2015-01-21 14:11:41.220795343 +0100
 +++ /tmp/pgis_reg/test_1_out    2015-03-20 15:32:27.583928175 +0100
 @@ -31,10 +31,13 @@
  distancepoly6|0|32.5269119345812|LINESTRING(2 2,2 2)|LINESTRING(2 2,2
 2)|LINESTRING(2 2,25 25)|LINESTRING(25 25,2 2)
  3dDistancetest1|6.40312423743285|6.40312423743285|f|f|LINESTRING(1 1 1,3
 2 7)|POINT(1 1 1)|LINESTRING(1 1 1,3 2 7)
  3dDistancetest2|0|1.73205080756888|t|t|LINESTRING(1 1 1,1 1 1)|POINT(1 1
 1)|LINESTRING(1 1 1,0 0 0)
 -3dDistancetest3|4.09994192757944|6.48074069840786|t|f|LINESTRING(1 1
 1,0.61904761904762 -0.19047619047619 4.90476190476191)|POINT(1 1
 1)|LINESTRING(1 1 1,5 2 6)
 -3dDistancetest4|2|10.0498756211209|t|f|LINESTRING(1 1 3,1 1 1)|POINT(1 1
 3)|LINESTRING(5 7 8,1 1 1)
 -3dDistancetest5|2|10|t|f|LINESTRING(5 0 5,5 2 5)|POINT(5 0
 5)|LINESTRING(11 0 5,5 0 13)
 -3dDistancetest6|0
 +3dDistancetest3|0.894427190999916|6.48074069840786|t|f|LINESTRING(1 1
 1,0.61904761904762 -0.19047619047619 4.90476190476191)|POINT(1 1
 1)|LINESTRING(1 1 1,5 2 6)
 +3dDistancetest4|0|10.0498756211209|t|f|LINESTRING(1 1 3,1 1 1)|POINT(1 1
 3)|LINESTRING(5 7 8,1 1 1)
 +3dDistancetest5|0|10|t|f|LINESTRING(5 0 5,5 2 5)|POINT(5 0
 5)|LINESTRING(11 0 5,5 0 13)
 +NOTICE:  During distance(A,B) :
 +NOTICE:    with A: LINESTRING(1/1 1/1 1/1,2/1 2/1 2/1)
 +NOTICE:     and B: POLYGON((0/1 0/1 0/1,2/1 2/1 2/1,3/1 3/1 0/1,0/1 0/1
 0/1))
 +ERROR:  Polygon is invalid : ring 0 self intersects : POLYGON((0/1
 0/1,2/1 2/1,3/1 3/1,0/1 0/1))
  emptyPolyArea|0
  emptyLineArea|0
  emptyPointArea|0
 --- sfcgal/tickets_expected     2015-03-06 09:55:39.138987646 +0100
 +++ /tmp/pgis_reg/test_9_out    2015-03-20 15:33:31.992180051 +0100
 @@ -233,7 +233,7 @@
  #2048|2|t|t
  #2048|3|f|f
  #2112a|0|LINESTRING(2.5 2.5 1,2.5 2.5 1)
 -#2112b|1|LINESTRING(1 1 1,1 0 1)
 +#2112b|0|LINESTRING(1 1 1,1 0 1)
  #2108|SRID=3395;POINTM EMPTY
  #2117|SRID=3395;POINTM EMPTY
  #2110.1|f
 }}}

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/3056#comment:5>
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