detail/envelope/initialize.hpp

0001 // Boost.Geometry (aka GGL, Generic Geometry Library)
0002
0003 // Copyright (c) 2015, Oracle and/or its affiliates.
0004
0005 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
0006
0007 // Distributed under the Boost Software License, Version 1.0.
0008 // (See accompanying file LICENSE_1_0.txt or copy at
0009 // http://www.boost.org/LICENSE_1_0.txt)
0010
0011 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_INITIALIZE_HPP
0012 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_INITIALIZE_HPP
0013
0014 #include <cstddef>
0015
0016 #include <boost/numeric/conversion/bounds.hpp>
0017
0018 #include <boost/geometry/core/access.hpp>
0019 #include <boost/geometry/core/coordinate_dimension.hpp>
0020 #include <boost/geometry/core/coordinate_type.hpp>
0021
0022
0023 namespace boost { namespace geometry
0024 {
0025
0026 #ifndef DOXYGEN_NO_DETAIL
0027 namespace detail { namespace envelope
0028 {
0029
0030 template <std::size_t Dimension, std::size_t DimensionCount>
0031 struct initialize_loop
0032 {
0033     template <typename Box, typename CoordinateType>
0034     static inline void apply(Box& box,
0035                              CoordinateType min_value,
0036                              CoordinateType max_value)
0037     {
0038         geometry::set<min_corner, Dimension>(box, min_value);
0039         geometry::set<max_corner, Dimension>(box, max_value);
0040
0041         initialize_loop
0042             <
0043                 Dimension + 1, DimensionCount
0044             >::apply(box, min_value, max_value);
0045     }
0046 };
0047
0048 template <std::size_t DimensionCount>
0049 struct initialize_loop<DimensionCount, DimensionCount>
0050 {
0051     template <typename Box, typename CoordinateType>
0052     static inline void apply(Box&, CoordinateType, CoordinateType)
0053     {
0054     }
0055 };
0056
0057
0058 template
0059 <
0060     typename Box,
0061     std::size_t Dimension = 0,
0062     std::size_t DimensionCount = dimension<Box>::value
0063 >
0064 struct initialize
0065 {
0066     typedef typename coordinate_type<Box>::type coordinate_type;
0067
0068     static inline void apply(Box& box,
0069         coordinate_type min_value
0070             = boost::numeric::bounds<coordinate_type>::highest(),
0071         coordinate_type max_value
0072             = boost::numeric::bounds<coordinate_type>::lowest())
0073     {
0074         initialize_loop
0075             <
0076                 Dimension, DimensionCount
0077             >::apply(box, min_value, max_value);
0078     }
0079 };
0080
0081 }} // namespace detail::envelope
0082 #endif // DOXYGEN_NO_DETAIL
0083
0084 }} // namespace boost::geometry
0085
0086 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_INITIALIZE_HPP