[Boost-bugs] [Boost C++ Libraries] #5358: polygon resize() generates bad/broken vertices

Subject: [Boost-bugs] [Boost C++ Libraries] #5358: polygon resize() generates bad/broken vertices
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-03-23 03:33:22

#5358: polygon resize() generates bad/broken vertices
--------------------------------------------+-------------------------------
 Reporter:  Andy Ross <andy@…>              |       Owner:  ljsimons   
     Type:  Bugs                            |      Status:  new        
Milestone:  To Be Determined                |   Component:  polygon    
  Version:  Boost Development Trunk         |    Severity:  Showstopper
 Keywords:                                  |  
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 boost::polygon::resize() (and its variants:
 shrink()/bloat()/operator+(), etc...) routinely produces "bad"
 vertices in the output stream.  Most of the shrunken polygon is
 correct, but a handful of vertices seem to be replaced with visually
 random locations.

 The attached code (which has non-trivial input data, but not so
 complicated that it can't be inspected by hand) shows the problem
 pretty clearly.  The "before" polygon (image attached) looks good, the
 "after" shrunken version is mostly correct with some oddball
 excursions.

 Setting corner_fill_arc to true suppresses this behavior, and the
 output polygon looks more correct (though obviously the output is
 different).  That, however, has some severe performance problems (to
 be detailed in a separate bug) and isn't an acceptable substitute.

 This is a showstopper for me right now.  Test vs. svn as of submission
 date.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5358>
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