| [/============================================================================ |
| Boost.Geometry (aka GGL, Generic Geometry Library) |
| |
| Copyright (c) 2014 Barend Gehrels, Amsterdam, the Netherlands. |
| |
| Use, modification and distribution is subject to the Boost Software License, |
| Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| http://www.boost.org/LICENSE_1_0.txt) |
| =============================================================================/] |
| |
| [def __this_function__ buffer] |
| |
| [heading Strategies] |
| The 5 strategies give the user control to the generated buffer |
| |
| * convex corners can be rounded or sharp |
| * line-ends can be rounded or flat |
| * distance can be symmetric or assymetric, and can be specified as negative (deflate) |
| * around points the shape can be circular or square |
| * the sides can be controlled (currently there is only one option provided) |
| |
| The next figure shows where in the generated buffer the strategies have effect |
| |
| [$img/algorithms/buffer_strategies.png] |
| |
| [heading_conformance_ogc __this_function__..Buffer] |
| It is conformant if used with the following combination of strategies: |
| [link geometry.reference.strategies.strategy_buffer_join_round join_round], |
| [link geometry.reference.strategies.strategy_buffer_end_round end_round], |
| [link geometry.reference.strategies.strategy_buffer_distance_symmetric distance_symmetric], |
| [link geometry.reference.strategies.strategy_buffer_point_circle point_circle], |
| side_straight |
| |
| [heading Supported geometries] |
| [table |
| [[ ][2D Cartesian]] |
| [[Point][[$img/ok.png]]] |
| [[Segment][[$img/nyi.png]]] |
| [[Box][[$img/nyi.png]]] |
| [[Linestring][[$img/ok.png]]] |
| [[Ring][[$img/ok.png]]] |
| [[Polygon][[$img/ok.png]]] |
| [[MultiPoint][[$img/ok.png]]] |
| [[MultiLinestring][[$img/ok.png]]] |
| [[MultiPolygon][[$img/ok.png]]] |
| ] |
| |
| |
| [heading Examples] |
| [buffer_with_strategies] |
| |
| [heading The linestring case] |
| [$img/algorithms/buffer_linestring.png] |
| |
| [heading The multi_point case] |
| [$img/algorithms/buffer_multi_point.png] |
| |
| [heading The multi_polygon case] |
| [$img/algorithms/buffer_multi_polygon.png] |
| |
| [heading Available Strategies] |
| * JoinStrategy: [link geometry.reference.strategies.strategy_buffer_join_round join_round (cartesian)] |
| * JoinStrategy: [link geometry.reference.strategies.strategy_buffer_join_miter join_miter (cartesian)] |
| * EndStrategy: [link geometry.reference.strategies.strategy_buffer_end_round end_round (cartesian)] |
| * EndStrategy: [link geometry.reference.strategies.strategy_buffer_end_flat end_flat (cartesian)] |
| * DistanceStrategy: [link geometry.reference.strategies.strategy_buffer_distance_symmetric distance_symmetric] |
| * DistanceStrategy: [link geometry.reference.strategies.strategy_buffer_distance_asymmetric distance_asymmetric] |
| * PointStrategy: [link geometry.reference.strategies.strategy_buffer_point_circle point_circle (cartesian)] |
| * PointStrategy: [link geometry.reference.strategies.strategy_buffer_point_square point_square (cartesian)] |
| * SideStrategy: [link geometry.reference.strategies.strategy_buffer_side_straight side_straight (cartesian)] |
