...one of the most highly
regarded and expertly designed C++ library projects in the
world.

— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards

Checks if two geometries have at least one intersection.

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

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 true if two geometries intersect each other

Either

`#include <boost/geometry.hpp>`

Or

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

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

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 typedef boost::geometry::model::d2::point_xy<double> P; 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