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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="geometry.reference.concepts.concept_segment"></a><a class="link" href="concept_segment.html" title="Segment Concept">Segment |
| Concept</a> |
| </h4></div></div></div> |
| <a name="geometry.reference.concepts.concept_segment.description"></a><h6> |
| <a name="geometry.reference.concepts.concept_segment.description-heading"></a> |
| <a class="link" href="concept_segment.html#geometry.reference.concepts.concept_segment.description">Description</a> |
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| <p> |
| The Segment Concept describes the requirements for a segment type. All |
| algorithms in Boost.Geometry will check any geometry arguments against |
| the concept requirements. |
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| <a name="geometry.reference.concepts.concept_segment.concept_definition"></a><h6> |
| <a name="geometry.reference.concepts.concept_segment.concept_definition-heading"></a> |
| <a class="link" href="concept_segment.html#geometry.reference.concepts.concept_segment.concept_definition">Concept |
| Definition</a> |
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| there must be a specialization of <code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">tag</span></code> |
| defining <code class="computeroutput"><span class="identifier">segment_tag</span></code> |
| as type |
| </li> |
| <li class="listitem"> |
| there must be a specialization of <code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">point_type</span></code> |
| to define the underlying point type (even if it does not consist of |
| points, it should define this type, to indicate the points it can work |
| with) |
| </li> |
| <li class="listitem"> |
| there must be a specialization of <code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">indexed_access</span></code>, |
| per index and per dimension, with two functions: |
| <div class="itemizedlist"><ul class="itemizedlist" type="circle"> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">get</span></code> to get a |
| coordinate value |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">set</span></code> to set a |
| coordinate value (this one is not checked for ConstSegment) |
| </li> |
| </ul></div> |
| </li> |
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| <th align="left">Note</th> |
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| <tr><td align="left" valign="top"><p> |
| The segment concept is similar to the box concept, defining using another |
| tag. However, the box concept assumes the index as <code class="computeroutput"><span class="identifier">min_corner</span></code>, |
| <code class="computeroutput"><span class="identifier">max_corner</span></code>, while for |
| the segment concept, there is no assumption. |
| </p></td></tr> |
| </table></div> |
| <a name="geometry.reference.concepts.concept_segment.available_models"></a><h6> |
| <a name="geometry.reference.concepts.concept_segment.available_models-heading"></a> |
| <a class="link" href="concept_segment.html#geometry.reference.concepts.concept_segment.available_models">Available |
| Models</a> |
| </h6> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| <a class="link" href="../models/model_segment.html" title="model::segment">model::segment</a> |
| </li> |
| <li class="listitem"> |
| <a class="link" href="../models/model_referring_segment.html" title="model::referring_segment">referring |
| segment</a> |
| </li> |
| </ul></div> |
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| <td align="right"><div class="copyright-footer">Copyright © 2011 Barend Gehrels, Bruno Lalande, Mateusz Loskot<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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