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1 | [/============================================================================ |
2 | Boost.Geometry (aka GGL, Generic Geometry Library) | |
3 | ||
4 | Copyright (c) 2009-2012 Mateusz Loskot, London, UK. | |
5 | Copyright (c) 2009-2012 Barend Gehrels, Amsterdam, the Netherlands. | |
6 | Copyright (c) 2009-2012 Bruno Lalande, Paris, France. | |
7 | ||
8 | Use, modification and distribution is subject to the Boost Software License, | |
9 | Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
10 | http://www.boost.org/LICENSE_1_0.txt) | |
11 | =============================================================================/] | |
12 | ||
13 | [section:concept_segment Segment Concept] | |
14 | ||
15 | [heading Description] | |
16 | [concept Segment..segment] | |
17 | ||
18 | ||
19 | [heading Concept Definition] | |
20 | ||
21 | * there must be a specialization of `traits::tag` defining `segment_tag` as type | |
22 | * there must be a specialization of `traits::point_type` to define the underlying point type | |
23 | (even if it does not consist of points, it should define this type, to indicate the points it can work with) | |
24 | * there must be a specialization of `traits::indexed_access`, per index and per dimension, with two functions: | |
25 | * `get` to get a coordinate value | |
26 | * `set` to set a coordinate value (this one is not checked for ConstSegment) | |
27 | ||
28 | [note The segment concept is similar to the box concept, defining using another tag. | |
29 | However, the box concept assumes the index as `min_corner`, `max_corner`, while for the segment concept, there is no assumption.] | |
30 | ||
31 | [heading Available Models] | |
32 | * [link geometry.reference.models.model_segment model::segment] | |
33 | * [link geometry.reference.models.model_referring_segment referring segment] | |
34 | ||
35 | [endsect] |