...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
The macro BOOST_GEOMETRY_REGISTER_BOX_TEMPLATED registers a box such that it is recognized by Boost.Geometry and that Boost.Geometry functionality can used with the specified type. The type must have one template parameter, which should be a point type, and should not be specified. Boost.Geometry takes care of inserting the template parameter. Hence all types of this templated box are registered, regardless of their point type.
#define BOOST_GEOMETRY_REGISTER_BOX_TEMPLATED(Box, MinCorner, MaxCorner)
Name |
Description |
---|---|
Box |
Box type to be registered |
MinCorner |
minimum corner (should be public member or method) |
MaxCorner |
maximum corner (should be public member or method) |
#include <boost/geometry/geometries/register/box.hpp>
Show the use of the macro BOOST_GEOMETRY_REGISTER_BOX_TEMPLATED
#include <iostream> #include <boost/geometry.hpp> #include <boost/geometry/geometries/point_xy.hpp> #include <boost/geometry/geometries/register/box.hpp> template <typename P> struct my_box { P ll, ur; }; // Register the box type BOOST_GEOMETRY_REGISTER_BOX_TEMPLATED(my_box, ll, ur) int main() { using box = my_box<boost::geometry::model::d2::point_xy<double>>; box b = boost::geometry::make<box>(0, 0, 2, 2); std::cout << "Area: " << boost::geometry::area(b) << std::endl; return 0; }
Output:
Area: 4