boost/boost/geometry/algorithms/detail/disjoint/linear_segment_or_box.hpp

// 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.
// Copyright (c) 2013-2014 Adam Wulkiewicz, Lodz, Poland.

// This file was modified by Oracle on 2013-2014.
// Modifications copyright (c) 2013-2014, Oracle and/or its affiliates.

// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// 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_ALGORITHMS_DETAIL_DISJOINT_LINEAR_SEGMENT_OR_BOX_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISJOINT_LINEAR_SEGMENT_OR_BOX_HPP

#include <boost/range.hpp>
#include <boost/geometry/util/range.hpp>

#include <boost/geometry/core/closure.hpp>

#include <boost/geometry/geometries/segment.hpp>

#include <boost/geometry/algorithms/not_implemented.hpp>

#include <boost/geometry/views/closeable_view.hpp>

#include <boost/geometry/algorithms/detail/disjoint/multirange_geometry.hpp>
#include <boost/geometry/algorithms/dispatch/disjoint.hpp>


namespace boost { namespace geometry
{


#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace disjoint
{


template
<
    typename Range,
    closure_selector Closure,
    typename SegmentOrBox
>
struct disjoint_range_segment_or_box
{
    static inline
    bool apply(Range const& range, SegmentOrBox const& segment_or_box)
    {
        typedef typename closeable_view<Range const, Closure>::type view_type;

        typedef typename ::boost::range_value<view_type>::type point_type;
        typedef typename ::boost::range_iterator
            <
                view_type const
            >::type const_iterator;

        typedef typename ::boost::range_size<view_type>::type size_type;

        typedef typename geometry::model::referring_segment
            <
                point_type const
            > range_segment;

        view_type view(range);

        const size_type count = ::boost::size(view);

        if ( count == 0 )
        {
            return false;
        }
        else if ( count == 1 )
        {
            return dispatch::disjoint
                <
                    point_type, SegmentOrBox
                >::apply(geometry::range::front<view_type const>(view),
                         segment_or_box);
        }
        else
        {
            const_iterator it0 = ::boost::begin(view);
            const_iterator it1 = ::boost::begin(view) + 1;
            const_iterator last = ::boost::end(view);

            for ( ; it1 != last ; ++it0, ++it1 )
            {
                range_segment rng_segment(*it0, *it1);
                if ( !dispatch::disjoint
                         <
                             range_segment, SegmentOrBox
                         >::apply(rng_segment, segment_or_box) )
                {
                    return false;
                }
            }
            return true;
        }
    }
};




template
<
    typename Linear,
    typename SegmentOrBox,
    typename Tag = typename tag<Linear>::type
>
struct disjoint_linear_segment_or_box
    : not_implemented<Linear, SegmentOrBox>
{};


template <typename Linestring, typename SegmentOrBox>
struct disjoint_linear_segment_or_box<Linestring, SegmentOrBox, linestring_tag>
    : disjoint_range_segment_or_box<Linestring, closed, SegmentOrBox>
{};


template <typename MultiLinestring, typename SegmentOrBox>
struct disjoint_linear_segment_or_box
    <
        MultiLinestring, SegmentOrBox, multi_linestring_tag
    > : multirange_constant_size_geometry<MultiLinestring, SegmentOrBox>
{};


}} // namespace detail::disjoint
#endif // DOXYGEN_NO_DETAIL


#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{


template <typename Linear, typename Segment>
struct disjoint<Linear, Segment, 2, linear_tag, segment_tag, false>
    : detail::disjoint::disjoint_linear_segment_or_box<Linear, Segment>
{};


template <typename Linear, typename Box, std::size_t DimensionCount>
struct disjoint<Linear, Box, DimensionCount, linear_tag, box_tag, false>
    : detail::disjoint::disjoint_linear_segment_or_box<Linear, Box>
{};


} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH


}} // namespace boost::geometry


#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISJOINT_LINEAR_SEGMENT_OR_BOX_HPP