67 lines
1.5 KiB
C++
67 lines
1.5 KiB
C++
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// Boost.Geometry
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// Copyright (c) 2021, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Licensed under the Boost Software License version 1.0.
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// http://www.boost.org/users/license.html
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#ifndef BOOST_GEOMETRY_STRATEGY_CARTESIAN_ENVELOPE_BOXES_HPP
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#define BOOST_GEOMETRY_STRATEGY_CARTESIAN_ENVELOPE_BOXES_HPP
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#include <boost/geometry/algorithms/detail/envelope/initialize.hpp>
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#include <boost/geometry/strategy/cartesian/expand_box.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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class cartesian_boxes
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{
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public:
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template <typename Box>
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class state
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{
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friend cartesian_boxes;
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Box m_box;
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bool m_initialized = false;
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};
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template <typename Box>
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static void apply(state<Box> & st, Box const& box)
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{
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if (! st.m_initialized)
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{
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st.m_box = box;
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st.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(st.m_box, box);
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}
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}
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template <typename Box>
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static void result(state<Box> const& st, Box & box)
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{
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if (st.m_initialized)
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{
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box = st.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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};
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}} // namespace strategy::envelope
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}} //namepsace boost::geometry
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#endif // BOOST_GEOMETRY_STRATEGY_CARTESIAN_ENVELOPE_BOXES_HPP
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