Module buffer 

OVL7 — buffer: grow a geometry outward by a fixed distance.

Mirrors boost/geometry/algorithms/buffer.hpp and the buffer strategies under strategies/buffer/. A buffer offsets every part of the input outward by distance, rounding or mitering the corners, and unions the offset pieces into an output polygon.

v1 scope: positive distance buffers of a point (→ a circle) and a convex polygon (→ the polygon grown with rounded corners). The general non-convex / negative-distance buffer, which needs the full offset-and-self-union machinery, is deferred — it builds on the same overlay union this module already uses.

Join / end / point strategies are modelled as small enums (JoinStrategy, PointStrategy) mirroring Boost’s join_round / join_miter and point_circle / point_square strategy types.

Enums

JoinStrategy

How to fill the wedge at a convex corner of the offset boundary.

PointStrategy

How to approximate a buffered point.

Functions

buffer_convex_polygon

Buffer a convex polygon outward by a positive distance, rounding the corners per join.

buffer_point

Buffer a point by distance, producing the disc (or square) approximation.