121 lines
3.2 KiB
C++
121 lines
3.2 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
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// This file was modified by Oracle on 2015-2020.
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// Modifications copyright (c) 2015-2020, Oracle and/or its affiliates.
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// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
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// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_STRATEGY_CARTESIAN_ENVELOPE_HPP
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#define BOOST_GEOMETRY_STRATEGY_CARTESIAN_ENVELOPE_HPP
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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#include <boost/geometry/algorithms/detail/envelope/initialize.hpp>
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#include <boost/geometry/strategy/cartesian/envelope_box.hpp>
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#include <boost/geometry/strategy/cartesian/envelope_segment.hpp>
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#include <boost/geometry/strategy/cartesian/expand_box.hpp>
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#include <boost/geometry/strategy/cartesian/expand_segment.hpp>
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namespace boost { namespace geometry
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{
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namespace strategy { namespace envelope
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{
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template <typename CalculationType = void>
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class cartesian
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{
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public:
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typedef cartesian_tag cs_tag;
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// Linestring, Ring, Polygon
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template <typename Range>
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static inline typename boost::range_iterator<Range const>::type begin(Range const& range)
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{
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return boost::begin(range);
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}
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template <typename Range>
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static inline typename boost::range_iterator<Range const>::type end(Range const& range)
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{
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return boost::end(range);
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}
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// MultiLinestring, MultiPolygon
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template <typename Box>
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struct multi_state
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{
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multi_state()
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: m_initialized(false)
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{}
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void apply(Box const& single_box)
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{
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if (! m_initialized)
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{
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m_box = single_box;
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m_initialized = true;
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}
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else
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{
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strategy::expand::cartesian_box::apply(m_box, single_box);
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}
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}
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void result(Box & box)
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{
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if (m_initialized)
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{
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box = m_box;
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}
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else
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{
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geometry::detail::envelope::initialize<Box, 0, dimension<Box>::value>::apply(box);
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}
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}
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private:
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bool m_initialized;
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Box m_box;
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};
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};
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#ifndef DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
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namespace services
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{
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template <typename Tag, typename CalculationType>
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struct default_strategy<Tag, cartesian_tag, CalculationType>
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{
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typedef strategy::envelope::cartesian<CalculationType> type;
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};
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} // namespace services
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#endif // DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
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}} // namespace strategy::envelope
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}} //namepsace boost::geometry
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#endif // BOOST_GEOMETRY_STRATEGY_CARTESIAN_ENVELOPE_HPP
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