Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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assign_values (2 coordinate values)

Assign two coordinates to a geometry (usually a 2D point)

Synopsis

template<typename Geometry, typename Type>
void assign_values(Geometry & geometry, Type const & c1, Type const & c2)

Parameters

Type

Concept

Name

Description

Geometry &

Any type fulfilling a Geometry Concept

geometry

A model of the specified concept

Type const &

numerical type (int, double, ttmath, ...) to specify the coordinates

c1

First coordinate (usually x-coordinate)

Type const &

numerical type (int, double, ttmath, ...) to specify the coordinates

c2

Second coordinate (usually y-coordinate)

Header

Either

#include <boost/geometry.hpp>

Or

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

Example

Shows the usage of assign to set point coordinates

#include <iostream>
#include <iomanip>

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

int main()
{
    using boost::geometry::assign_values;


    boost::geometry::model::d2::point_xy<double> p1;
    assign_values(p1, 1.2345, 2.3456);

    std::cout
        << std::setprecision(20)
        << boost::geometry::dsv(p1) << std::endl;

    return 0;
}

Output:

(1.2344999999999999, 2.3456000000000001)
(1.2345, 2.3456)
See also

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