// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2014-2015 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2014-2015 Bruno Lalande, Paris, France.
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// Copyright (c) 2014-2015 Mateusz Loskot, London, UK.
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// Copyright (c) 2014-2015 Adam Wulkiewicz, Lodz, Poland.
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// This file was modified by Oracle on 2015, 2018.
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// Modifications copyright (c) 2015-2018, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (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_POLICIES_ROBUSTNESS_RESCALE_POLICY_HPP
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#define BOOST_GEOMETRY_POLICIES_ROBUSTNESS_RESCALE_POLICY_HPP
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#include <cstddef>
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#include <boost/geometry/core/coordinate_type.hpp>
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#include <boost/geometry/policies/robustness/segment_ratio.hpp>
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#include <boost/geometry/policies/robustness/robust_point_type.hpp>
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#include <boost/geometry/util/math.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail
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{
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template <typename FpPoint, typename IntPoint, typename CalculationType>
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struct robust_policy
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{
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static bool const enabled = true;
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typedef typename geometry::coordinate_type<IntPoint>::type output_ct;
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robust_policy(FpPoint const& fp_min, IntPoint const& int_min, CalculationType const& the_factor)
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: m_fp_min(fp_min)
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, m_int_min(int_min)
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, m_multiplier(the_factor)
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{
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}
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template <std::size_t Dimension, typename Value>
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inline output_ct apply(Value const& value) const
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{
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// a + (v-b)*f
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CalculationType const a = static_cast<CalculationType>(get<Dimension>(m_int_min));
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CalculationType const b = static_cast<CalculationType>(get<Dimension>(m_fp_min));
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CalculationType const result = a + (value - b) * m_multiplier;
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return geometry::math::rounding_cast<output_ct>(result);
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}
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FpPoint m_fp_min;
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IntPoint m_int_min;
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CalculationType m_multiplier;
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};
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} // namespace detail
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#endif
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// Implement meta-functions for this policy
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// Define the IntPoint as a robust-point type
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template <typename Point, typename FpPoint, typename IntPoint, typename CalculationType>
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struct robust_point_type<Point, detail::robust_policy<FpPoint, IntPoint, CalculationType> >
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{
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typedef IntPoint type;
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};
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_POLICIES_ROBUSTNESS_RESCALE_POLICY_HPP
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