strategy::buffer::point_circle

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#### strategy::buffer::point_circle

Create a circular buffer around a point.

###### Description

This strategy can be used as PointStrategy for the buffer algorithm. It creates a circular buffer around a point. It can be applied for points and multi_points, but also for a linestring (if it is degenerate, so consisting of only one point) and for polygons (if it is degenerate). This strategy is only applicable for Cartesian coordinate systems.

###### Synopsis

    class strategy::buffer::point_circle
    {
      // ...
    };

###### Constructor(s)

Function | Description | Parameters
--- | --- | ---

    point_circle(std::size_t count = 90)

Constructs the strategy.

std::size_t: count: number of points for the created circle (if count is smaller than 3, count is internally set to 3)

###### Header

`#include <boost/geometry/strategies/cartesian/buffer_point_circle.hpp>`

###### Example

Shows how the point_circle strategy can be used as a PointStrategy to create circular buffers around points

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

    int main()
    {
        typedef boost::geometry::model::d2::point_xy<double> point;
        typedef boost::geometry::model::polygon<point> polygon;

        // Declare the point_circle strategy
        boost::geometry::strategy::buffer::point_circle point_strategy(360);

        // Declare other strategies
        boost::geometry::strategy::buffer::distance_symmetric<double> distance_strategy(0.7);
        boost::geometry::strategy::buffer::join_round join_strategy;
        boost::geometry::strategy::buffer::end_round end_strategy;
        boost::geometry::strategy::buffer::side_straight side_strategy;

        // Declare/fill of a multi point
        boost::geometry::model::multi_point<point> mp;
        boost::geometry::read_wkt("MULTIPOINT((3 3),(3 4),(4 4),(7 3))", mp);

        // Create the buffer of a multi point
        boost::geometry::model::multi_polygon<polygon> result;
        boost::geometry::buffer(mp, result,
                    distance_strategy, side_strategy,
                    join_strategy, end_strategy, point_strategy);

        return 0;
    }

###### Output

###### See also

- buffer (with strategies)
- point_square