Subject: [boost] Boost.Polygon issues
From: Barend Gehrels (barend_at_[hidden])
Date: 2011-03-05 09:03:29
Hi Luke,
You asked me on the GGL mailing list ( http://bit.ly/hCwdJx ) to verify
tests using Boost.Polygon to check Boost.Geometry's behaviour at some
points.
I cannot reach that point. I ported a test that I already had (recursive
polygons) to Boost.Polygon. I'm using the Polygon Set Concept with
integer coordinates. Actually all input is in the 90/45 degree range.
If I run the program, it often gives me the wrong results, even in the
simpler cases. And often it just crashes, in the line 1748 of file
polygon_arbitrary_formation.hpp (called from the area function)
I extracted two (wrong but not crashing) cases. Source code here:
http://bit.ly/fCYRWL
Summary of second case:
area p: 45000
area q: 55000
area intersection: 0
area union: 60000
The last one, area of union, should be 100000, if the intersection is
zero, the union contains everything and its area therefore should sum to
100000
Regards, Barend