Geometry Boost List: [geometry] boost::geometry::equals

Subject: [geometry] boost::geometry::equals
From: shalabuda (shalabuda_at_[hidden])
Date: 2014-02-18 13:14:22

Hi,

Could you help me figure out the following weird behavior of
boost::geometry::equals?

The first cout in the following piece of code returns 1, but the second one
is 0.

   
boost::geometry::model::polygon<boost::geometry::model::d2::point_xy&lt;double>>
p1, p2;
   
boost::geometry::model::ring<boost::geometry::model::d2::point_xy&lt;double>>
r1, r2;

    boost::geometry::read_wkt("POLYGON((1 1, 2 2, 3 -1, 1 1))", p1);
    boost::geometry::read_wkt("POLYGON((2 2, 3 -1, 1 1, 2 2))", r1);

    boost::geometry::correct(p1);
    boost::geometry::correct(r1);

    std::cout << boost::geometry::equals(p1, r1) << std::endl;

    boost::geometry::read_wkt("POLYGON((9.65421 -0.776658, 9.1545 0.0888657,
9.82324 0.83158, 9.65421 -0.776658))", p2);
    boost::geometry::read_wkt("POLYGON((9.1545 0.0888657, 9.82324 0.83158,
9.65421 -0.776658, 9.1545 0.0888657))", r2);

    boost::geometry::correct(p2);
    boost::geometry::correct(r2);

    std::cout << boost::geometry::equals(p2, r2) << std::endl;

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