You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
// Boost.Geometry
|
|
|
|
// Copyright (c) 2021, Oracle and/or its affiliates.
|
|
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
|
|
|
|
// Distributed under 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_ENVELOPE_GEOMETRY_COLLECTION_HPP
|
|
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_GEOMETRY_COLLECTION_HPP
|
|
|
|
|
|
#include <boost/geometry/algorithms/detail/visit.hpp>
|
|
#include <boost/geometry/algorithms/dispatch/envelope.hpp>
|
|
#include <boost/geometry/algorithms/is_empty.hpp>
|
|
|
|
#include <boost/geometry/core/tags.hpp>
|
|
|
|
|
|
namespace boost { namespace geometry
|
|
{
|
|
|
|
|
|
#ifndef DOXYGEN_NO_DISPATCH
|
|
namespace dispatch
|
|
{
|
|
|
|
|
|
template <typename Collection>
|
|
struct envelope<Collection, geometry_collection_tag>
|
|
{
|
|
template <typename Geometry, typename Box, typename Strategy>
|
|
static inline void apply(Geometry const& geometry,
|
|
Box& mbr,
|
|
Strategy const& strategy)
|
|
{
|
|
using strategy_t = decltype(strategy.envelope(geometry, mbr));
|
|
using state_t = typename strategy_t::template multi_state<Box>;
|
|
|
|
state_t state;
|
|
detail::visit_breadth_first([&](auto const& g)
|
|
{
|
|
if (! geometry::is_empty(g))
|
|
{
|
|
Box b;
|
|
envelope<util::remove_cref_t<decltype(g)>>::apply(g, b, strategy);
|
|
state.apply(b);
|
|
}
|
|
return true;
|
|
}, geometry);
|
|
state.result(mbr);
|
|
}
|
|
};
|
|
|
|
|
|
} // namespace dispatch
|
|
#endif // DOXYGEN_NO_DISPATCH
|
|
|
|
|
|
}} // namespace boost::geometry
|
|
|
|
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_GEOMETRY_COLLECTION_HPP
|