470 lines
13 KiB
C++
470 lines
13 KiB
C++
// Boost.Polygon library point_concept.hpp header file
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// Copyright (c) Intel Corporation 2008.
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// Copyright (c) 2008-2012 Simonson Lucanus.
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// Copyright (c) 2012-2012 Andrii Sydorchuk.
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// See http://www.boost.org for updates, documentation, and revision history.
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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_POLYGON_POINT_CONCEPT_HPP
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#define BOOST_POLYGON_POINT_CONCEPT_HPP
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#include "isotropy.hpp"
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#include "point_traits.hpp"
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namespace boost {
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namespace polygon {
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struct point_concept {};
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template <typename ConceptType>
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struct is_point_concept {
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typedef gtl_no type;
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};
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template <>
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struct is_point_concept<point_concept> {
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typedef gtl_yes type;
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};
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template <typename ConceptType>
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struct is_mutable_point_concept {
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typedef gtl_no type;
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};
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template <>
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struct is_mutable_point_concept<point_concept> {
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typedef gtl_yes type;
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};
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template <typename GeometryType, typename BoolType>
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struct point_coordinate_type_by_concept {
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typedef void type;
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};
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template <typename GeometryType>
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struct point_coordinate_type_by_concept<GeometryType, gtl_yes> {
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typedef typename point_traits<GeometryType>::coordinate_type type;
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};
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template <typename GeometryType>
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struct point_coordinate_type {
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typedef typename point_coordinate_type_by_concept<
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GeometryType,
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typename is_point_concept<
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typename geometry_concept<GeometryType>::type
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>::type
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>::type type;
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};
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template <typename GeometryType, typename BoolType>
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struct point_difference_type_by_concept {
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typedef void type;
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};
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template <typename GeometryType>
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struct point_difference_type_by_concept<GeometryType, gtl_yes> {
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typedef typename coordinate_traits<
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typename point_traits<GeometryType>::coordinate_type
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>::coordinate_difference type;
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};
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template <typename GeometryType>
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struct point_difference_type {
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typedef typename point_difference_type_by_concept<
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GeometryType,
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typename is_point_concept<
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typename geometry_concept<GeometryType>::type
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>::type
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>::type type;
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};
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template <typename GeometryType, typename BoolType>
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struct point_distance_type_by_concept {
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typedef void type;
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};
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template <typename GeometryType>
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struct point_distance_type_by_concept<GeometryType, gtl_yes> {
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typedef typename coordinate_traits<
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typename point_coordinate_type<GeometryType>::type
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>::coordinate_distance type;
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};
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template <typename GeometryType>
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struct point_distance_type {
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typedef typename point_distance_type_by_concept<
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GeometryType,
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typename is_point_concept<
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typename geometry_concept<GeometryType>::type
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>::type
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>::type type;
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};
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struct y_pt_get : gtl_yes {};
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template <typename PointType>
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typename enable_if<
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typename gtl_and<
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y_pt_get,
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typename is_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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typename point_coordinate_type<PointType>::type
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>::type get(const PointType& point, orientation_2d orient) {
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return point_traits<PointType>::get(point, orient);
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}
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struct y_pt_set : gtl_yes {};
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template <typename PointType>
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typename enable_if<
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typename gtl_and<
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y_pt_set,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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void
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>::type set(PointType& point, orientation_2d orient,
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typename point_mutable_traits<PointType>::coordinate_type value) {
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point_mutable_traits<PointType>::set(point, orient, value);
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}
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struct y_pt_construct : gtl_yes {};
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template <typename PointType>
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typename enable_if<
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typename gtl_and<
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y_pt_construct,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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PointType>::type construct(
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typename point_mutable_traits<PointType>::coordinate_type x,
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typename point_mutable_traits<PointType>::coordinate_type y) {
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return point_mutable_traits<PointType>::construct(x, y);
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}
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struct y_pt_assign : gtl_yes {};
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template <typename PointType1, typename PointType2>
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typename enable_if<
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typename gtl_and_3<
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y_pt_assign,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType1>::type
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>::type,
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typename is_point_concept<
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typename geometry_concept<PointType2>::type
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>::type
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>::type,
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PointType1>::type& assign(PointType1& lvalue, const PointType2& rvalue) {
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set(lvalue, HORIZONTAL, get(rvalue, HORIZONTAL));
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set(lvalue, VERTICAL, get(rvalue, VERTICAL));
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return lvalue;
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}
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struct y_p_x : gtl_yes {};
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template <typename PointType>
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typename enable_if<
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typename gtl_and<
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y_p_x,
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typename is_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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typename point_coordinate_type<PointType>::type
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>::type x(const PointType& point) {
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return get(point, HORIZONTAL);
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}
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struct y_p_y : gtl_yes {};
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template <typename PointType>
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typename enable_if<
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typename gtl_and<
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y_p_y,
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typename is_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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typename point_coordinate_type<PointType>::type
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>::type y(const PointType& point) {
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return get(point, VERTICAL);
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}
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struct y_p_sx : gtl_yes {};
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template <typename PointType>
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typename enable_if<
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typename gtl_and<
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y_p_sx,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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void>::type x(PointType& point,
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typename point_mutable_traits<PointType>::coordinate_type value) {
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set(point, HORIZONTAL, value);
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}
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struct y_p_sy : gtl_yes {};
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template <typename PointType>
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typename enable_if<
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typename gtl_and<
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y_p_sy,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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void>::type y(PointType& point,
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typename point_mutable_traits<PointType>::coordinate_type value) {
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set(point, VERTICAL, value);
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}
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struct y_pt_equiv : gtl_yes {};
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template <typename PointType1, typename PointType2>
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typename enable_if<
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typename gtl_and_3<
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y_pt_equiv,
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typename is_point_concept<
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typename geometry_concept<PointType1>::type
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>::type,
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typename is_point_concept<
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typename geometry_concept<PointType2>::type
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>::type
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>::type,
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bool>::type equivalence(
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const PointType1& point1, const PointType2& point2) {
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return (x(point1) == x(point2)) && (y(point1) == y(point2));
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}
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struct y_pt_man_dist : gtl_yes {};
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template <typename PointType1, typename PointType2>
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typename enable_if<
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typename gtl_and_3<
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y_pt_man_dist,
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typename is_point_concept<
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typename geometry_concept<PointType1>::type
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>::type,
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typename is_point_concept<
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typename geometry_concept<PointType2>::type
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>::type
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>::type,
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typename point_difference_type<PointType1>::type>::type
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manhattan_distance(const PointType1& point1, const PointType2& point2) {
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return euclidean_distance(point1, point2, HORIZONTAL) +
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euclidean_distance(point1, point2, VERTICAL);
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}
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struct y_pt_ed1 : gtl_yes {};
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template <typename PointType1, typename PointType2>
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typename enable_if<
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typename gtl_and_3<
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y_pt_ed1,
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typename is_point_concept<
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typename geometry_concept<PointType1>::type
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>::type,
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typename is_point_concept<
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typename geometry_concept<PointType2>::type
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>::type
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>::type,
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typename point_difference_type<PointType1>::type>::type
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euclidean_distance(
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const PointType1& point1,
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const PointType2& point2,
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orientation_2d orient) {
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typename point_difference_type<PointType1>::type dif =
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get(point1, orient) - get(point2, orient);
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return (dif < 0) ? -dif : dif;
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}
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struct y_pt_eds : gtl_yes {};
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template <typename PointType1, typename PointType2>
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typename enable_if<
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typename gtl_and_3<
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y_pt_eds,
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typename is_point_concept<
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typename geometry_concept<PointType1>::type
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>::type,
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typename is_point_concept<
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typename geometry_concept<PointType2>::type
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>::type
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>::type,
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typename point_difference_type<PointType1>::type>::type
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distance_squared(const PointType1& point1, const PointType2& point2) {
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typename point_difference_type<PointType1>::type dx =
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euclidean_distance(point1, point2, HORIZONTAL);
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typename point_difference_type<PointType1>::type dy =
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euclidean_distance(point1, point2, VERTICAL);
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dx *= dx;
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dy *= dy;
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return dx + dy;
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}
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struct y_pt_ed2 : gtl_yes {};
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template <typename PointType1, typename PointType2>
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typename enable_if<
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typename gtl_and_3<
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y_pt_ed2,
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typename is_point_concept<
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typename geometry_concept<PointType1>::type
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>::type,
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typename is_point_concept<
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typename geometry_concept<PointType2>::type
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>::type
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>::type,
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typename point_distance_type<PointType1>::type>::type
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euclidean_distance(const PointType1& point1, const PointType2& point2) {
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return (std::sqrt)(
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static_cast<double>(distance_squared(point1, point2)));
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}
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struct y_pt_convolve : gtl_yes {};
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template <typename PointType1, typename PointType2>
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typename enable_if<
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typename gtl_and_3<
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y_pt_convolve,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType1>::type
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>::type,
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typename is_point_concept<
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typename geometry_concept<PointType2>::type
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>::type
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>::type,
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PointType1>::type& convolve(PointType1& lvalue, const PointType2& rvalue) {
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x(lvalue, x(lvalue) + x(rvalue));
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y(lvalue, y(lvalue) + y(rvalue));
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return lvalue;
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}
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struct y_pt_deconvolve : gtl_yes {};
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template <typename PointType1, typename PointType2>
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typename enable_if<
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typename gtl_and_3<
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y_pt_deconvolve,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType1>::type
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>::type,
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typename is_point_concept<
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typename geometry_concept<PointType2>::type
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>::type
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>::type,
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PointType1>::type& deconvolve(PointType1& lvalue, const PointType2& rvalue) {
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x(lvalue, x(lvalue) - x(rvalue));
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y(lvalue, y(lvalue) - y(rvalue));
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return lvalue;
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}
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struct y_pt_scale_up : gtl_yes {};
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template <typename PointType, typename CType>
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typename enable_if<
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typename gtl_and<
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y_pt_scale_up,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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PointType>::type& scale_up(PointType& point, CType factor) {
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typedef typename point_coordinate_type<PointType>::type Unit;
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x(point, x(point) * (Unit)factor);
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y(point, y(point) * (Unit)factor);
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return point;
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}
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struct y_pt_scale_down : gtl_yes {};
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template <typename PointType, typename CType>
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typename enable_if<
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typename gtl_and<
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y_pt_scale_down,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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PointType>::type& scale_down(PointType& point, CType factor) {
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typedef typename point_coordinate_type<PointType>::type Unit;
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typedef typename coordinate_traits<Unit>::coordinate_distance dt;
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x(point, scaling_policy<Unit>::round((dt)(x(point)) / (dt)factor));
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y(point, scaling_policy<Unit>::round((dt)(y(point)) / (dt)factor));
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return point;
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}
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struct y_pt_scale : gtl_yes {};
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template <typename PointType, typename ScaleType>
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typename enable_if<
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typename gtl_and<
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y_pt_scale,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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PointType>::type& scale(PointType& point, const ScaleType& scaling) {
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typedef typename point_coordinate_type<PointType>::type Unit;
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Unit x_coord(x(point));
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Unit y_coord(y(point));
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scaling.scale(x_coord, y_coord);
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x(point, x_coord);
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y(point, y_coord);
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return point;
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}
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struct y_pt_transform : gtl_yes {};
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template <typename PointType, typename TransformType>
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typename enable_if<
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typename gtl_and<
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y_pt_transform,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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PointType>::type& transform(PointType& point, const TransformType& transform) {
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typedef typename point_coordinate_type<PointType>::type Unit;
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Unit x_coord(x(point));
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Unit y_coord(y(point));
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transform.transform(x_coord, y_coord);
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x(point, x_coord);
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y(point, y_coord);
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return point;
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}
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struct y_pt_move : gtl_yes {};
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template <typename PointType>
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typename enable_if<
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typename gtl_and<
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y_pt_move,
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typename is_mutable_point_concept<
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typename geometry_concept<PointType>::type
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>::type
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>::type,
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PointType>::type& move(PointType& point, orientation_2d orient,
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typename point_coordinate_type<PointType>::type displacement) {
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typedef typename point_coordinate_type<PointType>::type Unit;
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Unit coord = get(point, orient);
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set(point, orient, coord + displacement);
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return point;
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}
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} // polygon
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} // boost
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#endif // BOOST_POLYGON_POINT_CONCEPT_HPP
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