I try boost::geometry::intersects algorithm(1 arg version) in Boost 1.47.0.
Follow program result is "false". but, I hope result is "true".
Is this Boost.Geometry bug?
#include <iostream>
#include <boost/assign/list_of.hpp>
#include <boost/geometry/geometry.hpp>
namespace bg = boost::geometry;
int main()
{
typedef bg::model::d2::point_xy<double> point;
const bg::model::linestring<point> line = boost::assign::list_of<point>
// (0, 0) // result become "true" when comment-in
(0, 4)
(4, 4)
(2, 2)
(2, 5)
;
const bool result = bg::intersects(line);
std::cout << std::boolalpha << result << std::endl;
}
Regards,
>>========================
Akira Takahashi
mailto:faitha...@gmail.com
blog: http://d.hatena.ne.jp/faith_and_brave/
> Hi,
>
> I try boost::geometry::intersects algorithm(1 arg version) in Boost 1.47.0.
> Follow program result is "false". but, I hope result is "true".
It certainly should return true.
> Is this Boost.Geometry bug?
Will look at this next weekend.
Thanks for the report,
Barend
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On 27-7-2011 3:17, Akira Takahashi wrote:
> Hi,
>
> I try boost::geometry::intersects algorithm(1 arg version) in Boost 1.47.0.
> Follow program result is "false". but, I hope result is "true".
> Is this Boost.Geometry bug?
It is fixed (in Trunk), thanks for the report.
What was happening is that it detected that first/last segment
intersected, which is possible for a linestring (but skipped for a
closed ring). I added a unit test for this case.
Regards, Barend
> It is fixed (in Trunk), thanks for the report.
I confirmed fix.
Thanks!
>>========================
Akira Takahashi
mailto:faitha...@gmail.com
blog: http://d.hatena.ne.jp/faith_and_brave/