Boost C++ Libraries

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BOOST_GEOMETRY_REGISTER_BOX

Macro to register a box.

Description

The macro BOOST_GEOMETRY_REGISTER_BOX registers a box such that it is recognized by Boost.Geometry and that Boost.Geometry functionality can used with the specified type. The box may contain template parameters, which must be specified then.

Synopsis

#define BOOST_GEOMETRY_REGISTER_BOX(Box, Point, MinCorner,
                             MaxCorner)

Parameters

Name	Description
Box	Box type to be registered
Point	Point type on which box is based. Might be two or three-dimensional
MinCorner	minimum corner (should be public member or method)
MaxCorner	maximum corner (should be public member or method)

Header

#include <boost/geometry/geometries/register/box.hpp>

Example

Show the use of the macro BOOST_GEOMETRY_REGISTER_BOX

#include <iostream>
#include <boost/geometry.hpp>
#include <boost/geometry/geometries/register/point.hpp>
#include <boost/geometry/geometries/register/box.hpp>

struct my_point
{
    double x, y;
};

struct my_box
{
    my_point ll, ur;
};

// Register the point type
BOOST_GEOMETRY_REGISTER_POINT_2D(my_point, double, cs::cartesian, x, y)

// Register the box type, also notifying that it is based on "my_point"
BOOST_GEOMETRY_REGISTER_BOX(my_box, my_point, ll, ur)

int main()
{
    my_box b = boost::geometry::make<my_box>(0, 0, 2, 2);
    std::cout << "Area: "  << boost::geometry::area(b) << std::endl;
    return 0;
}

Output:

Area: 4