Boost C++ Libraries

Macro to register a templated linestring.

Description

The macro BOOST_GEOMETRY_REGISTER_LINESTRING_TEMPLATED registers a templated linestring 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 linestring are registered, regardless of their point type.

Synopsis

#define BOOST_GEOMETRY_REGISTER_LINESTRING_TEMPLATED(Linestring)

Parameters

Header

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

Example

Show the use of the macro BOOST_GEOMETRY_REGISTER_LINESTRING_TEMPLATED

#include <iostream>
#include <deque>

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

// Adapt any deque to Boost.Geometry Linestring Concept
BOOST_GEOMETRY_REGISTER_LINESTRING_TEMPLATED(std::deque)

int main()
{
    std::deque<boost::geometry::model::d2::point_xy<double> > line(2);
    boost::geometry::assign_values(line[0], 1, 1);
    boost::geometry::assign_values(line[1], 2, 2);

    // Boost.Geometry algorithms work on any deque now
    std::cout << "Length: "  << boost::geometry::length(line) << std::endl;
    std::cout << "Line: "  << boost::geometry::dsv(line) << std::endl;

    return 0;
}

Output:

Length: 1.41421
Line: ((1, 1), (2, 2))