[Boost-bugs] [Boost C++ Libraries] #10195: Silent Failure for boost::geometry::intersection()

Subject: [Boost-bugs] [Boost C++ Libraries] #10195: Silent Failure for boost::geometry::intersection()
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-07-14 19:08:42

#10195: Silent Failure for boost::geometry::intersection()
------------------------------+---------------------------
 Reporter:  anonymous         |      Owner:  barendgehrels
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  geometry
  Version:  Boost 1.55.0      |   Severity:  Problem
 Keywords:                    |
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 I am performing intersections between polygons, with points represented
 using 64-bit integer coordinates. If I use signed ints (int64_t), the
 intersection operations are correct. If I use unsigned ints (uint64_t),
 the returned intersection polygon collection is simply one of the two
 polygons I originally handed in.

 The underlying intersection algorithm must require signed information, but
 this fact is not communicated to users. As a result, the output of
 unsigned int operations can appear nonsensical. Added documentation is
 appreciated. Adding an actual exception when attempting to do unsigned-
 int-based intersections would be even better.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/10195>
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