336 lines
9.9 KiB
C++
336 lines
9.9 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
|
|
|
|
// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
|
|
// Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
|
|
// Copyright (c) 2009-2012 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_ARITHMETIC_ARITHMETIC_HPP
|
|
#define BOOST_GEOMETRY_ARITHMETIC_ARITHMETIC_HPP
|
|
|
|
#include <functional>
|
|
|
|
#include <boost/call_traits.hpp>
|
|
#include <boost/concept/requires.hpp>
|
|
|
|
#include <boost/geometry/core/coordinate_type.hpp>
|
|
#include <boost/geometry/geometries/concepts/point_concept.hpp>
|
|
#include <boost/geometry/util/for_each_coordinate.hpp>
|
|
#include <boost/geometry/util/select_most_precise.hpp>
|
|
|
|
|
|
namespace boost { namespace geometry
|
|
{
|
|
|
|
#ifndef DOXYGEN_NO_DETAIL
|
|
namespace detail
|
|
{
|
|
|
|
|
|
template <typename Point>
|
|
struct param
|
|
{
|
|
typedef typename boost::call_traits
|
|
<
|
|
typename coordinate_type<Point>::type
|
|
>::param_type type;
|
|
};
|
|
|
|
|
|
template <typename Value, template <typename> class Function>
|
|
struct value_operation
|
|
{
|
|
Value m_value;
|
|
|
|
inline value_operation(Value const &value)
|
|
: m_value(value)
|
|
{}
|
|
|
|
template <typename PointDst, std::size_t Index>
|
|
inline void apply(PointDst& point_dst) const
|
|
{
|
|
set<Index>(point_dst,
|
|
Function
|
|
<
|
|
typename geometry::select_most_precise
|
|
<
|
|
Value,
|
|
typename geometry::coordinate_type<PointDst>::type
|
|
>::type
|
|
>()(get<Index>(point_dst), m_value));
|
|
}
|
|
};
|
|
|
|
template <typename PointSrc, template <typename> class Function>
|
|
struct point_operation
|
|
{
|
|
PointSrc const& m_point_src;
|
|
|
|
inline point_operation(PointSrc const& point)
|
|
: m_point_src(point)
|
|
{}
|
|
|
|
template <typename PointDst, std::size_t Index>
|
|
inline void apply(PointDst& point_dst) const
|
|
{
|
|
set<Index>(point_dst,
|
|
Function
|
|
<
|
|
typename geometry::select_most_precise
|
|
<
|
|
typename geometry::coordinate_type<PointSrc>::type,
|
|
typename geometry::coordinate_type<PointDst>::type
|
|
>::type
|
|
>()(get<Index>(point_dst), get<Index>(m_point_src)));
|
|
}
|
|
};
|
|
|
|
|
|
template <typename Value>
|
|
struct value_assignment
|
|
{
|
|
Value m_value;
|
|
|
|
inline value_assignment(Value const &value)
|
|
: m_value(value)
|
|
{}
|
|
|
|
template <typename PointDst, std::size_t Index>
|
|
inline void apply(PointDst& point_dst) const
|
|
{
|
|
set<Index>(point_dst, m_value);
|
|
}
|
|
};
|
|
|
|
template <typename PointSrc>
|
|
struct point_assignment
|
|
{
|
|
PointSrc const& m_point_src;
|
|
|
|
inline point_assignment(PointSrc const& point)
|
|
: m_point_src(point)
|
|
{}
|
|
|
|
template <typename PointDst, std::size_t Index>
|
|
inline void apply(PointDst& point_dst) const
|
|
{
|
|
set<Index>(point_dst, get<Index>(m_point_src));
|
|
}
|
|
};
|
|
|
|
|
|
} // namespace detail
|
|
#endif // DOXYGEN_NO_DETAIL
|
|
|
|
/*!
|
|
\brief Adds the same value to each coordinate of a point
|
|
\ingroup arithmetic
|
|
\details
|
|
\tparam Point \tparam_point
|
|
\param p point
|
|
\param value value to add
|
|
*/
|
|
template <typename Point>
|
|
inline void add_value(Point& p, typename detail::param<Point>::type value)
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point>) );
|
|
|
|
for_each_coordinate(p,
|
|
detail::value_operation
|
|
<
|
|
typename coordinate_type<Point>::type,
|
|
std::plus
|
|
>(value));
|
|
}
|
|
|
|
/*!
|
|
\brief Adds a point to another
|
|
\ingroup arithmetic
|
|
\details The coordinates of the second point will be added to those of the first point.
|
|
The second point is not modified.
|
|
\tparam Point1 \tparam_point
|
|
\tparam Point2 \tparam_point
|
|
\param p1 first point
|
|
\param p2 second point
|
|
*/
|
|
template <typename Point1, typename Point2>
|
|
inline void add_point(Point1& p1, Point2 const& p2)
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point1>) );
|
|
BOOST_CONCEPT_ASSERT( (concepts::ConstPoint<Point2>) );
|
|
|
|
for_each_coordinate(p1, detail::point_operation<Point2, std::plus>(p2));
|
|
}
|
|
|
|
/*!
|
|
\brief Subtracts the same value to each coordinate of a point
|
|
\ingroup arithmetic
|
|
\details
|
|
\tparam Point \tparam_point
|
|
\param p point
|
|
\param value value to subtract
|
|
*/
|
|
template <typename Point>
|
|
inline void subtract_value(Point& p, typename detail::param<Point>::type value)
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point>) );
|
|
|
|
for_each_coordinate(p,
|
|
detail::value_operation
|
|
<
|
|
typename coordinate_type<Point>::type,
|
|
std::minus
|
|
>(value));
|
|
}
|
|
|
|
/*!
|
|
\brief Subtracts a point to another
|
|
\ingroup arithmetic
|
|
\details The coordinates of the second point will be subtracted to those of the first point.
|
|
The second point is not modified.
|
|
\tparam Point1 \tparam_point
|
|
\tparam Point2 \tparam_point
|
|
\param p1 first point
|
|
\param p2 second point
|
|
*/
|
|
template <typename Point1, typename Point2>
|
|
inline void subtract_point(Point1& p1, Point2 const& p2)
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point1>) );
|
|
BOOST_CONCEPT_ASSERT( (concepts::ConstPoint<Point2>) );
|
|
|
|
for_each_coordinate(p1, detail::point_operation<Point2, std::minus>(p2));
|
|
}
|
|
|
|
/*!
|
|
\brief Multiplies each coordinate of a point by the same value
|
|
\ingroup arithmetic
|
|
\details
|
|
\tparam Point \tparam_point
|
|
\param p point
|
|
\param value value to multiply by
|
|
*/
|
|
template <typename Point>
|
|
inline void multiply_value(Point& p, typename detail::param<Point>::type value)
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point>) );
|
|
|
|
for_each_coordinate(p,
|
|
detail::value_operation
|
|
<
|
|
typename coordinate_type<Point>::type,
|
|
std::multiplies
|
|
>(value));
|
|
}
|
|
|
|
/*!
|
|
\brief Multiplies a point by another
|
|
\ingroup arithmetic
|
|
\details The coordinates of the first point will be multiplied by those of the second point.
|
|
The second point is not modified.
|
|
\tparam Point1 \tparam_point
|
|
\tparam Point2 \tparam_point
|
|
\param p1 first point
|
|
\param p2 second point
|
|
\note This is *not* a dot, cross or wedge product. It is a mere field-by-field multiplication.
|
|
*/
|
|
template <typename Point1, typename Point2>
|
|
inline void multiply_point(Point1& p1, Point2 const& p2)
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point1>) );
|
|
BOOST_CONCEPT_ASSERT( (concepts::ConstPoint<Point2>) );
|
|
|
|
for_each_coordinate(p1, detail::point_operation<Point2, std::multiplies>(p2));
|
|
}
|
|
|
|
/*!
|
|
\brief Divides each coordinate of the same point by a value
|
|
\ingroup arithmetic
|
|
\details
|
|
\tparam Point \tparam_point
|
|
\param p point
|
|
\param value value to divide by
|
|
*/
|
|
template <typename Point>
|
|
inline void divide_value(Point& p, typename detail::param<Point>::type value)
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point>) );
|
|
|
|
for_each_coordinate(p,
|
|
detail::value_operation
|
|
<
|
|
typename coordinate_type<Point>::type,
|
|
std::divides
|
|
>(value));
|
|
}
|
|
|
|
/*!
|
|
\brief Divides a point by another
|
|
\ingroup arithmetic
|
|
\details The coordinates of the first point will be divided by those of the second point.
|
|
The second point is not modified.
|
|
\tparam Point1 \tparam_point
|
|
\tparam Point2 \tparam_point
|
|
\param p1 first point
|
|
\param p2 second point
|
|
*/
|
|
template <typename Point1, typename Point2>
|
|
inline void divide_point(Point1& p1, Point2 const& p2)
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point1>) );
|
|
BOOST_CONCEPT_ASSERT( (concepts::ConstPoint<Point2>) );
|
|
|
|
for_each_coordinate(p1, detail::point_operation<Point2, std::divides>(p2));
|
|
}
|
|
|
|
/*!
|
|
\brief Assign each coordinate of a point the same value
|
|
\ingroup arithmetic
|
|
\details
|
|
\tparam Point \tparam_point
|
|
\param p point
|
|
\param value value to assign
|
|
*/
|
|
template <typename Point>
|
|
inline void assign_value(Point& p, typename detail::param<Point>::type value)
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point>) );
|
|
|
|
for_each_coordinate(p,
|
|
detail::value_assignment
|
|
<
|
|
typename coordinate_type<Point>::type
|
|
>(value));
|
|
}
|
|
|
|
/*!
|
|
\brief Assign a point with another
|
|
\ingroup arithmetic
|
|
\details The coordinates of the first point will be assigned those of the second point.
|
|
The second point is not modified.
|
|
\tparam Point1 \tparam_point
|
|
\tparam Point2 \tparam_point
|
|
\param p1 first point
|
|
\param p2 second point
|
|
*/
|
|
template <typename Point1, typename Point2>
|
|
inline void assign_point(Point1& p1, Point2 const& p2)
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point1>) );
|
|
BOOST_CONCEPT_ASSERT( (concepts::ConstPoint<Point2>) );
|
|
|
|
for_each_coordinate(p1, detail::point_assignment<Point2>(p2));
|
|
}
|
|
|
|
|
|
}} // namespace boost::geometry
|
|
|
|
|
|
#endif // BOOST_GEOMETRY_ARITHMETIC_ARITHMETIC_HPP
|