[Boost-bugs] [Boost C++ Libraries] #9162: intersects returns incorrect result in spherical equatorial

Subject: [Boost-bugs] [Boost C++ Libraries] #9162: intersects returns incorrect result in spherical equatorial
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-09-25 04:48:57

#9162: intersects returns incorrect result in spherical equatorial
------------------------------+---------------------------
 Reporter:  hujie.eagle@…     |      Owner:  barendgehrels
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  geometry
  Version:  Boost 1.54.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+---------------------------
 Hi,

 The intersects does not return the correct result for point in polygon
 with spherical equatorial.
 These are two cases:
 1. a polygon with pole (north/south) in it
     assume polygon PL: POLYGON((0 80,-90 80, -180 80, 90 80, 0 80))
     a point P: POINT(0 90)

 {{{
 boost::geometry::intersects(P, PL)
 }}}
  should return TRUE, but return false in boost 1.54.
 2. point in the opposite side of the polygon
     assume polygon PL: POLYGON((30 0,30 30,90 30, 90 0, 30 0))
     a point P: POINT(-120 21)

 {{{
 boost::geometry::intersects(P, PL)
 }}}
  should return FALSE, but return true in boost 1.54.

 The issue may be caused by the spherical_side_formula can not handle this
 two cases.

 Attachment is the test case for these two issues.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9162>
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