You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and dots ('.'), can be up to 35 characters long. Letters must be lowercase.
125 lines
3.5 KiB
125 lines
3.5 KiB
// Boost.Geometry (aka GGL, Generic Geometry Library) |
|
|
|
// Copyright (c) 2008-2011 Bruno Lalande, Paris, France. |
|
// Copyright (c) 2008-2011 Barend Gehrels, Amsterdam, the Netherlands. |
|
// Copyright (c) 2009-2011 Mateusz Loskot, London, UK. |
|
|
|
// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library |
|
// (geolib/GGL), copyright (c) 1995-2010 Geodan, 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) |
|
|
|
|
|
#ifndef BOOST_GEOMETRY_GEOMETRIES_CONCEPTS_LINESTRING_CONCEPT_HPP |
|
#define BOOST_GEOMETRY_GEOMETRIES_CONCEPTS_LINESTRING_CONCEPT_HPP |
|
|
|
|
|
#include <boost/concept_check.hpp> |
|
#include <boost/range/concepts.hpp> |
|
#include <boost/type_traits/remove_const.hpp> |
|
|
|
#include <boost/geometry/core/access.hpp> |
|
#include <boost/geometry/core/mutable_range.hpp> |
|
#include <boost/geometry/core/point_type.hpp> |
|
|
|
#include <boost/geometry/geometries/concepts/point_concept.hpp> |
|
|
|
|
|
|
|
namespace boost { namespace geometry { namespace concept |
|
{ |
|
|
|
|
|
/*! |
|
\brief Linestring concept |
|
\ingroup concepts |
|
\par Formal definition: |
|
The linestring concept is defined as following: |
|
- there must be a specialization of traits::tag defining linestring_tag as type |
|
- it must behave like a Boost.Range |
|
- it must implement a std::back_insert_iterator |
|
- either by implementing push_back |
|
- or by specializing std::back_insert_iterator |
|
|
|
\note to fulfill the concepts, no traits class has to be specialized to |
|
define the point type. |
|
|
|
\par Example: |
|
|
|
A custom linestring, defining the necessary specializations to fulfill to the concept. |
|
|
|
Suppose that the following linestring is defined: |
|
\dontinclude doxygen_5.cpp |
|
\skip custom_linestring1 |
|
\until }; |
|
|
|
It can then be adapted to the concept as following: |
|
\dontinclude doxygen_5.cpp |
|
\skip adapt custom_linestring1 |
|
\until }} |
|
|
|
\note |
|
- There is also the registration macro BOOST_GEOMETRY_REGISTER_LINESTRING |
|
- For registration of std::vector<P> (and deque, and list) it is enough to |
|
include the header-file geometries/adapted/std_as_linestring.hpp. That registers |
|
a vector as a linestring (so it cannot be registered as a linear ring then, |
|
in the same source code). |
|
|
|
|
|
*/ |
|
|
|
template <typename Geometry> |
|
class Linestring |
|
{ |
|
#ifndef DOXYGEN_NO_CONCEPT_MEMBERS |
|
typedef typename point_type<Geometry>::type point_type; |
|
|
|
BOOST_CONCEPT_ASSERT( (concept::Point<point_type>) ); |
|
BOOST_CONCEPT_ASSERT( (boost::RandomAccessRangeConcept<Geometry>) ); |
|
|
|
public : |
|
|
|
BOOST_CONCEPT_USAGE(Linestring) |
|
{ |
|
Geometry* ls = 0; |
|
traits::clear<Geometry>::apply(*ls); |
|
traits::resize<Geometry>::apply(*ls, 0); |
|
point_type* point = 0; |
|
traits::push_back<Geometry>::apply(*ls, *point); |
|
} |
|
#endif |
|
}; |
|
|
|
|
|
/*! |
|
\brief Linestring concept (const version) |
|
\ingroup const_concepts |
|
\details The ConstLinestring concept check the same as the Linestring concept, |
|
but does not check write access. |
|
*/ |
|
template <typename Geometry> |
|
class ConstLinestring |
|
{ |
|
#ifndef DOXYGEN_NO_CONCEPT_MEMBERS |
|
typedef typename point_type<Geometry>::type point_type; |
|
|
|
BOOST_CONCEPT_ASSERT( (concept::ConstPoint<point_type>) ); |
|
//BOOST_CONCEPT_ASSERT( (boost::RandomAccessRangeConcept<Geometry>) ); |
|
// Relaxed the concept. |
|
BOOST_CONCEPT_ASSERT( (boost::ForwardRangeConcept<Geometry>) ); |
|
|
|
|
|
public : |
|
|
|
BOOST_CONCEPT_USAGE(ConstLinestring) |
|
{ |
|
} |
|
#endif |
|
}; |
|
|
|
}}} // namespace boost::geometry::concept |
|
|
|
|
|
#endif // BOOST_GEOMETRY_GEOMETRIES_CONCEPTS_LINESTRING_CONCEPT_HPP
|
|
|