[postgis-tickets] [PostGIS] #4084: Wrong code-comment regarding front/back of BOX3D

PostGIS trac at osgeo.org
Wed May 9 15:15:03 PDT 2018


#4084: Wrong code-comment regarding front/back of BOX3D
---------------------+---------------------
 Reporter:  mat      |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  low      |  Milestone:
Component:  postgis  |    Version:  trunk
 Keywords:           |
---------------------+---------------------
 In the code for casting BOX3D to geometry, the six sides of the box are
 commented as front, back, top, bottom, left and right. However, front and
 back are the wrong way around. The y-axis points away from the viewer, so
 the the side with the y-max value is the back.

 I trusted these comments, which lead to some discrepancies. It took me
 several hours to realize the comments, which I took for a fact, were
 actually wrong.

 Link to code: https://github.com/postgis/postgis/blob/svn-
 trunk/postgis/lwgeom_box3d.c#L336

 Related question on stackexchange:
 https://gis.stackexchange.com/questions/282253/postgis-axis-orientation-
 box3d

 PR: https://github.com/postgis/postgis/pull/241

-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/4084>
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