strategy::buffer::end_round

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#### strategy::buffer::end_round

Let the buffer create rounded ends.

###### Description

This strategy can be used as EndStrategy for the buffer algorithm. It creates a rounded end for each linestring-end. It can be applied for (multi)linestrings. Also it is applicable for spikes in (multi)polygons. This strategy is only applicable for Cartesian coordinate systems.

###### Synopsis

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

###### Constructor(s)

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

    end_round(std::size_t points_per_circle = 90)

Constructs the strategy.

std::size_t: points_per_circle: points which would be used for a full circle (if points_per_circle is smaller than 4, it is internally set to 4)

###### Header

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

###### Example

Shows how the end_round strategy can be used as a EndStrategy to create rounded ends

    #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::linestring<point> linestring;
        typedef boost::geometry::model::polygon<point> polygon;

        // Declare the round-end strategy with 36 points for a full circle
        boost::geometry::strategy::buffer::end_round end_strategy(36);

        // Declare other strategies
        boost::geometry::strategy::buffer::distance_symmetric<double> distance_strategy(1.0);
        boost::geometry::strategy::buffer::side_straight side_strategy;
        boost::geometry::strategy::buffer::join_round join_strategy;
        boost::geometry::strategy::buffer::point_circle point_strategy;

        // Declare/fill a multi linestring
        boost::geometry::model::multi_linestring<linestring> ml;
        boost::geometry::read_wkt("MULTILINESTRING((3 5,5 10,7 5),(7 7,11 10,15 7,19 10))", ml);

        // Create the buffered geometry with rounded ends
        boost::geometry::model::multi_polygon<polygon> result;
        boost::geometry::buffer(ml, result,
                    distance_strategy, side_strategy,
                    join_strategy, end_strategy, point_strategy);

        return 0;
    }

###### Output

###### See also

- buffer (with strategies)
- end_flat