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Diffstat (limited to 'boost/geometry/strategies/cartesian/buffer_end_round.hpp')
-rw-r--r--boost/geometry/strategies/cartesian/buffer_end_round.hpp12
1 files changed, 10 insertions, 2 deletions
diff --git a/boost/geometry/strategies/cartesian/buffer_end_round.hpp b/boost/geometry/strategies/cartesian/buffer_end_round.hpp
index 74780d6..a233f1c 100644
--- a/boost/geometry/strategies/cartesian/buffer_end_round.hpp
+++ b/boost/geometry/strategies/cartesian/buffer_end_round.hpp
@@ -95,8 +95,9 @@ public :
//! \brief Constructs the strategy
//! \param 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)
explicit inline end_round(std::size_t points_per_circle = 90)
- : m_points_per_circle(points_per_circle)
+ : m_points_per_circle((points_per_circle < 4u) ? 4u : points_per_circle)
{}
#ifndef DOXYGEN_SHOULD_SKIP_THIS
@@ -106,7 +107,7 @@ public :
inline void apply(Point const& penultimate_point,
Point const& perp_left_point,
Point const& ultimate_point,
- Point const& ,
+ Point const& perp_right_point,
buffer_side_selector side,
DistanceStrategy const& distance,
RangeOut& range_out) const
@@ -142,6 +143,13 @@ public :
set<1>(shifted_point, get<1>(ultimate_point) + dist_half_diff * sin(alpha));
generate_points(shifted_point, alpha, (dist_left + dist_right) / two, range_out);
}
+
+ if (m_points_per_circle % 2 == 1)
+ {
+ // For a half circle, if the number of points is not even,
+ // we should insert the end point too, to generate a full cap
+ range_out.push_back(perp_right_point);
+ }
}
template <typename NumericType>