libcarla/include/system/boost/geometry/policies/robustness/rescale_policy.hpp
2024-10-18 13:19:59 +08:00

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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2014-2015 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2014-2015 Bruno Lalande, Paris, France.
// Copyright (c) 2014-2015 Mateusz Loskot, London, UK.
// Copyright (c) 2014-2015 Adam Wulkiewicz, Lodz, Poland.
// This file was modified by Oracle on 2015, 2018.
// Modifications copyright (c) 2015-2018, Oracle and/or its affiliates.
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// 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_POLICIES_ROBUSTNESS_RESCALE_POLICY_HPP
#define BOOST_GEOMETRY_POLICIES_ROBUSTNESS_RESCALE_POLICY_HPP
#include <cstddef>
#include <boost/geometry/core/coordinate_type.hpp>
#include <boost/geometry/policies/robustness/segment_ratio.hpp>
#include <boost/geometry/policies/robustness/robust_point_type.hpp>
#include <boost/geometry/util/math.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail
{
template <typename FpPoint, typename IntPoint, typename CalculationType>
struct robust_policy
{
static bool const enabled = true;
typedef typename geometry::coordinate_type<IntPoint>::type output_ct;
robust_policy(FpPoint const& fp_min, IntPoint const& int_min, CalculationType const& the_factor)
: m_fp_min(fp_min)
, m_int_min(int_min)
, m_multiplier(the_factor)
{
}
template <std::size_t Dimension, typename Value>
inline output_ct apply(Value const& value) const
{
// a + (v-b)*f
CalculationType const a = static_cast<CalculationType>(get<Dimension>(m_int_min));
CalculationType const b = static_cast<CalculationType>(get<Dimension>(m_fp_min));
CalculationType const result = a + (value - b) * m_multiplier;
return geometry::math::rounding_cast<output_ct>(result);
}
FpPoint m_fp_min;
IntPoint m_int_min;
CalculationType m_multiplier;
};
} // namespace detail
#endif
// Implement meta-functions for this policy
// Define the IntPoint as a robust-point type
template <typename Point, typename FpPoint, typename IntPoint, typename CalculationType>
struct robust_point_type<Point, detail::robust_policy<FpPoint, IntPoint, CalculationType> >
{
typedef IntPoint type;
};
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_POLICIES_ROBUSTNESS_RESCALE_POLICY_HPP