Hi Barend,
I have looked at test_buffer.hpp.
It gave me some tips on how to compute a buffer with buffer_inserter but I can't figure out how to define 2 templates : JoinStrategy and EndStrategy.
Could you help me to define them ?


Here is an easy code sample to go from a linestring to a buffered polygon.

typedef boost::geometry::model::d2::point_xy<double, boost::geometry::cs::cartesian> Point_type; 
typedef boost::geometry::model::polygon<Point_type> Polygon_type;///CCW closed cartesian polygon	
typedef boost::geometry::model::linestring<Point_type> LineString_type;///CCW closed cartesian polygon	
typedef boost::geometry::coordinate_type<LineString_type>::type coordinate_type;
typedef Point_type point_type;
typedef Point_type output_point_type;


LineString_type boostTrajectory; //my line string to buffer
//to be initialized here

boost::geometry::strategy::buffer::distance_asymmetric
    <
    coordinate_type
    > 
    distance_strategy(bufferDistance, bufferDistance);

std::vector<Polygon_type> buffered; //buffered result

boost::geometry::buffer_inserter<Polygon_type>(boostTrajectory, std::back_inserter(buffered),
    distance_strategy, 
     ???join_strategy???,
     ???end_strategy???
    );

regards.

Joan Abadie