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/geometry/core/access.hpp>
0017 #include <boost/geometry/core/coordinate_dimension.hpp>
0018 #include <boost/geometry/core/coordinate_type.hpp>
0019 #include <boost/geometry/util/bounds.hpp>
0020
0021
0022 namespace boost { namespace geometry
0023 {
0024
0025 #ifndef DOXYGEN_NO_DETAIL
0026 namespace detail { namespace envelope
0027 {
0028
0029 template <std::size_t Dimension, std::size_t DimensionCount>
0030 struct initialize_loop
0031 {
0032     template <typename Box, typename CoordinateType>
0033     static inline void apply(Box& box,
0034                              CoordinateType min_value,
0035                              CoordinateType max_value)
0036     {
0037         geometry::set<min_corner, Dimension>(box, min_value);
0038         geometry::set<max_corner, Dimension>(box, max_value);
0039
0040         initialize_loop
0041             <
0042                 Dimension + 1, DimensionCount
0043             >::apply(box, min_value, max_value);
0044     }
0045 };
0046
0047 template <std::size_t DimensionCount>
0048 struct initialize_loop<DimensionCount, DimensionCount>
0049 {
0050     template <typename Box, typename CoordinateType>
0051     static inline void apply(Box&, CoordinateType, CoordinateType)
0052     {
0053     }
0054 };
0055
0056
0057 template
0058 <
0059     typename Box,
0060     std::size_t Dimension = 0,
0061     std::size_t DimensionCount = dimension<Box>::value
0062 >
0063 struct initialize
0064 {
0065     typedef typename coordinate_type<Box>::type coordinate_type;
0066
0067     static inline void apply(Box& box,
0068         coordinate_type min_value
0069             = util::bounds<coordinate_type>::highest(),
0070         coordinate_type max_value
0071             = util::bounds<coordinate_type>::lowest())
0072     {
0073         initialize_loop
0074             <
0075                 Dimension, DimensionCount
0076             >::apply(box, min_value, max_value);
0077     }
0078 };
0079
0080 }} // namespace detail::envelope
0081 #endif // DOXYGEN_NO_DETAIL
0082
0083 }} // namespace boost::geometry
0084
0085 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_INITIALIZE_HPP