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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="geometry.reference.strategies.strategy_buffer_join_miter"></a><a class="link" href="strategy_buffer_join_miter.html" title="strategy::buffer::join_miter">strategy::buffer::join_miter</a> |
| </h4></div></div></div> |
| <p> |
| <a class="indexterm" name="idp131631136"></a><a class="indexterm" name="idp131631824"></a><a class="indexterm" name="idp131632512"></a> |
| Let the buffer create sharp corners. |
| </p> |
| <h6> |
| <a name="geometry.reference.strategies.strategy_buffer_join_miter.h0"></a> |
| <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_join_miter.description"></a></span><a class="link" href="strategy_buffer_join_miter.html#geometry.reference.strategies.strategy_buffer_join_miter.description">Description</a> |
| </h6> |
| <p> |
| This strategy can be used as JoinStrategy for the buffer algorithm. It |
| creates a sharp corners around each convex vertex. It can be applied for |
| (multi)linestrings and (multi)polygons. If corners are sharp by themselves, |
| the miters might become very long. Therefore there is a limit (miter_limit), |
| in terms of the used distance, which limits their length. The miter is |
| not changed to a bevel form (as done in some other software), it is just |
| adapted to the specified miter_limit but keeps its miter form. If the buffer |
| distance is 5.0, and the miter limit is 2.0, generated points will be located |
| at a distance of at most 10.0 (2*5) units. This strategy is only applicable |
| for Cartesian coordinate systems. |
| </p> |
| <h6> |
| <a name="geometry.reference.strategies.strategy_buffer_join_miter.h1"></a> |
| <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_join_miter.synopsis"></a></span><a class="link" href="strategy_buffer_join_miter.html#geometry.reference.strategies.strategy_buffer_join_miter.synopsis">Synopsis</a> |
| </h6> |
| <p> |
| </p> |
| <pre class="programlisting"><span class="keyword">class</span> <span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">join_miter</span> |
| <span class="special">{</span> |
| <span class="comment">// ...</span> |
| <span class="special">};</span> |
| </pre> |
| <p> |
| </p> |
| <h6> |
| <a name="geometry.reference.strategies.strategy_buffer_join_miter.h2"></a> |
| <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_join_miter.constructor_s_"></a></span><a class="link" href="strategy_buffer_join_miter.html#geometry.reference.strategies.strategy_buffer_join_miter.constructor_s_">Constructor(s)</a> |
| </h6> |
| <div class="informaltable"><table class="table"> |
| <colgroup> |
| <col> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| Function |
| </p> |
| </th> |
| <th> |
| <p> |
| Description |
| </p> |
| </th> |
| <th> |
| <p> |
| Parameters |
| </p> |
| </th> |
| </tr></thead> |
| <tbody><tr> |
| <td> |
| <p> |
| </p> |
| <pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">join_miter</span><span class="special">(</span><span class="keyword">double</span> <span class="identifier">miter_limit</span> <span class="special">=</span> <span class="number">5.0</span><span class="special">)</span></pre> |
| <p> |
| </p> |
| </td> |
| <td> |
| <p> |
| Constructs the strategy. |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="bold"><strong>double</strong></span>: <span class="emphasis"><em>miter_limit</em></span>: |
| The miter limit, to avoid excessively long miters around sharp |
| corners |
| </p> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <h6> |
| <a name="geometry.reference.strategies.strategy_buffer_join_miter.h3"></a> |
| <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_join_miter.header"></a></span><a class="link" href="strategy_buffer_join_miter.html#geometry.reference.strategies.strategy_buffer_join_miter.header">Header</a> |
| </h6> |
| <p> |
| <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">strategies</span><span class="special">/</span><span class="identifier">cartesian</span><span class="special">/</span><span class="identifier">buffer_join_miter</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| </p> |
| <h6> |
| <a name="geometry.reference.strategies.strategy_buffer_join_miter.h4"></a> |
| <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_join_miter.example"></a></span><a class="link" href="strategy_buffer_join_miter.html#geometry.reference.strategies.strategy_buffer_join_miter.example">Example</a> |
| </h6> |
| <p> |
| Shows how the join_miter strategy can be used as a JoinStrategy to create |
| sharp corners |
| </p> |
| <p> |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">point_xy</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| |
| |
| <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> |
| <span class="special">{</span> |
| <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">d2</span><span class="special">::</span><span class="identifier">point_xy</span><span class="special"><</span><span class="keyword">double</span><span class="special">></span> <span class="identifier">point</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">polygon</span><span class="special"><</span><span class="identifier">point</span><span class="special">></span> <span class="identifier">polygon</span><span class="special">;</span> |
| |
| <span class="comment">// Declare the join_miter strategy</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">join_miter</span> <span class="identifier">join_strategy</span><span class="special">;</span> |
| |
| <span class="comment">// Declare other strategies</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">distance_symmetric</span><span class="special"><</span><span class="keyword">double</span><span class="special">></span> <span class="identifier">distance_strategy</span><span class="special">(</span><span class="number">0.5</span><span class="special">);</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">end_flat</span> <span class="identifier">end_strategy</span><span class="special">;</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">side_straight</span> <span class="identifier">side_strategy</span><span class="special">;</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">::</span><span class="identifier">point_circle</span> <span class="identifier">point_strategy</span><span class="special">;</span> |
| |
| <span class="comment">// Declare/fill a multi polygon</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">multi_polygon</span><span class="special"><</span><span class="identifier">polygon</span><span class="special">></span> <span class="identifier">mp</span><span class="special">;</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">read_wkt</span><span class="special">(</span><span class="string">"MULTIPOLYGON(((5 5,7 8,9 5,5 5)),((8 7,8 10,11 10,11 7,8 7)))"</span><span class="special">,</span> <span class="identifier">mp</span><span class="special">);</span> |
| |
| <span class="comment">// Create the buffered geometry with sharp corners</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">multi_polygon</span><span class="special"><</span><span class="identifier">polygon</span><span class="special">></span> <span class="identifier">result</span><span class="special">;</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">(</span><span class="identifier">mp</span><span class="special">,</span> <span class="identifier">result</span><span class="special">,</span> |
| <span class="identifier">distance_strategy</span><span class="special">,</span> <span class="identifier">side_strategy</span><span class="special">,</span> |
| <span class="identifier">join_strategy</span><span class="special">,</span> <span class="identifier">end_strategy</span><span class="special">,</span> <span class="identifier">point_strategy</span><span class="special">);</span> |
| |
| |
| <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> |
| <span class="special">}</span> |
| </pre> |
| <p> |
| </p> |
| <h6> |
| <a name="geometry.reference.strategies.strategy_buffer_join_miter.h5"></a> |
| <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_join_miter.output"></a></span><a class="link" href="strategy_buffer_join_miter.html#geometry.reference.strategies.strategy_buffer_join_miter.output">Output</a> |
| </h6> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/strategies/buffer_join_miter.png" alt="buffer_join_miter"></span> |
| </p> |
| <h6> |
| <a name="geometry.reference.strategies.strategy_buffer_join_miter.h6"></a> |
| <span class="phrase"><a name="geometry.reference.strategies.strategy_buffer_join_miter.see_also"></a></span><a class="link" href="strategy_buffer_join_miter.html#geometry.reference.strategies.strategy_buffer_join_miter.see_also">See |
| also</a> |
| </h6> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| <a class="link" href="../algorithms/buffer/buffer_7_with_strategies.html" title="buffer (with strategies)">buffer |
| (with strategies)</a> |
| </li> |
| <li class="listitem"> |
| <a class="link" href="strategy_buffer_join_round.html" title="strategy::buffer::join_round">join_round</a> |
| </li> |
| </ul></div> |
| </div> |
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| Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its affiliates<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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