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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
// Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
// This file was modified by Oracle on 2014.
// Modifications copyright (c) 2014, Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// 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_STRATEGIES_CONCEPTS_DISTANCE_CONCEPT_HPP
#define BOOST_GEOMETRY_STRATEGIES_CONCEPTS_DISTANCE_CONCEPT_HPP
#include <vector>
#include <iterator>
#include <boost/concept_check.hpp>
#include <boost/core/ignore_unused.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/geometry/util/parameter_type_of.hpp>
#include <boost/geometry/geometries/concepts/point_concept.hpp>
#include <boost/geometry/geometries/segment.hpp>
#include <boost/geometry/geometries/point.hpp>
#include <boost/geometry/strategies/tags.hpp>
namespace boost { namespace geometry { namespace concept
{
/*!
\brief Checks strategy for point-point or point-box or box-box distance
\ingroup distance
*/
template <typename Strategy, typename Point1, typename Point2>
struct PointDistanceStrategy
{
#ifndef DOXYGEN_NO_CONCEPT_MEMBERS
private :
struct checker
{
template <typename ApplyMethod>
static void apply(ApplyMethod)
{
// 1: inspect and define both arguments of apply
typedef typename parameter_type_of
<
ApplyMethod, 0
>::type ptype1;
typedef typename parameter_type_of
<
ApplyMethod, 1
>::type ptype2;
// 2) must define meta-function "return_type"
typedef typename strategy::distance::services::return_type
<
Strategy, ptype1, ptype2
>::type rtype;
// 3) must define meta-function "comparable_type"
typedef typename strategy::distance::services::comparable_type
<
Strategy
>::type ctype;
// 4) must define meta-function "tag"
typedef typename strategy::distance::services::tag
<
Strategy
>::type tag;
static const bool is_correct_strategy_tag =
boost::is_same<tag, strategy_tag_distance_point_point>::value
|| boost::is_same<tag, strategy_tag_distance_point_box>::value
|| boost::is_same<tag, strategy_tag_distance_box_box>::value;
BOOST_MPL_ASSERT_MSG
((is_correct_strategy_tag),
INCORRECT_STRATEGY_TAG,
(types<tag>));
// 5) must implement apply with arguments
Strategy* str = 0;
ptype1 *p1 = 0;
ptype2 *p2 = 0;
rtype r = str->apply(*p1, *p2);
// 6) must define (meta)struct "get_comparable" with apply
ctype c = strategy::distance::services::get_comparable
<
Strategy
>::apply(*str);
// 7) must define (meta)struct "result_from_distance" with apply
r = strategy::distance::services::result_from_distance
<
Strategy,
ptype1, ptype2
>::apply(*str, 1.0);
boost::ignore_unused<tag>();
boost::ignore_unused(str, c, r);
}
};
public :
BOOST_CONCEPT_USAGE(PointDistanceStrategy)
{
checker::apply(&Strategy::template apply<Point1, Point2>);
}
#endif
};
/*!
\brief Checks strategy for point-segment distance
\ingroup strategy_concepts
*/
template <typename Strategy, typename Point, typename PointOfSegment>
struct PointSegmentDistanceStrategy
{
#ifndef DOXYGEN_NO_CONCEPT_MEMBERS
private :
struct checker
{
template <typename ApplyMethod>
static void apply(ApplyMethod)
{
// 1) inspect and define both arguments of apply
typedef typename parameter_type_of
<
ApplyMethod, 0
>::type ptype;
typedef typename parameter_type_of
<
ApplyMethod, 1
>::type sptype;
namespace services = strategy::distance::services;
// 2) must define meta-function "tag"
typedef typename services::tag<Strategy>::type tag;
BOOST_MPL_ASSERT_MSG
((boost::is_same
<
tag, strategy_tag_distance_point_segment
>::value),
INCORRECT_STRATEGY_TAG,
(types<tag>));
// 3) must define meta-function "return_type"
typedef typename services::return_type
<
Strategy, ptype, sptype
>::type rtype;
// 4) must define meta-function "comparable_type"
typedef typename services::comparable_type<Strategy>::type ctype;
// 5) must implement apply with arguments
Strategy *str = 0;
ptype *p = 0;
sptype *sp1 = 0;
sptype *sp2 = 0;
rtype r = str->apply(*p, *sp1, *sp2);
// 6) must define (meta-)struct "get_comparable" with apply
ctype cstrategy = services::get_comparable<Strategy>::apply(*str);
// 7) must define (meta-)struct "result_from_distance" with apply
r = services::result_from_distance
<
Strategy, ptype, sptype
>::apply(*str, rtype(1.0));
boost::ignore_unused(str, r, cstrategy);
}
};
public :
BOOST_CONCEPT_USAGE(PointSegmentDistanceStrategy)
{
checker::apply(&Strategy::template apply<Point, PointOfSegment>);
}
#endif
};
}}} // namespace boost::geometry::concept
#endif // BOOST_GEOMETRY_STRATEGIES_CONCEPTS_DISTANCE_CONCEPT_HPP
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