intersects (with strategy)

Checks if two geometries have at least one intersection.

Synopsis

template<typename Geometry1, typename Geometry2, typename Strategy>
bool intersects(Geometry1 const & geometry1, Geometry2 const & geometry2, Strategy const & strategy)

Parameters

Type	Concept	Name	Description
Geometry1 const &	Any type fulfilling a Geometry Concept	geometry1	A model of the specified concept
Geometry2 const &	Any type fulfilling a Geometry Concept	geometry2	A model of the specified concept
Strategy const &	Any type fulfilling a Intersects Strategy Concept	strategy	The strategy which will be used for intersects calculations

Returns

Returns true if two geometries intersect each other

Header

Either

#include <boost/geometry.hpp>

#include <boost/geometry/algorithms/intersects.hpp>

Conformance

The function intersects implements function Intersects from the OGC Simple Feature Specification.

The version with one parameter is additional and not described in the OGC standard

Examples

Check if two linestrings intersect each other

#include <iostream>

#include <boost/geometry.hpp>
#include <boost/geometry/geometries/linestring.hpp>
#include <boost/geometry/geometries/point_xy.hpp>

int main()
{
    // Calculate the intersects of a cartesian polygon
    using P = boost::geometry::model::d2::point_xy<double>;
    boost::geometry::model::linestring<P> line1, line2;

    boost::geometry::read_wkt("linestring(1 1,2 2,3 3)", line1);
    boost::geometry::read_wkt("linestring(2 1,1 2,4 0)", line2);

    bool b = boost::geometry::intersects(line1, line2);

    std::cout << "Intersects: " << (b ? "YES" : "NO") << std::endl;

    return 0;
}

Output:

Intersects: YES