936 lines
26 KiB
C++
936 lines
26 KiB
C++
// Boost.Polygon library interval_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_INTERVAL_CONCEPT_HPP
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#define BOOST_POLYGON_INTERVAL_CONCEPT_HPP
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#include "isotropy.hpp"
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#include "interval_traits.hpp"
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namespace boost {
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namespace polygon {
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struct interval_concept {};
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template <typename ConceptType>
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struct is_interval_concept {
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typedef gtl_no type;
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};
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template <>
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struct is_interval_concept<interval_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_interval_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_interval_concept<interval_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 interval_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 interval_coordinate_type_by_concept<GeometryType, gtl_yes> {
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typedef typename interval_traits<GeometryType>::coordinate_type type;
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};
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template <typename GeometryType>
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struct interval_coordinate_type {
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typedef typename interval_coordinate_type_by_concept<
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GeometryType,
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typename is_interval_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 interval_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 interval_difference_type_by_concept<GeometryType, gtl_yes> {
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typedef typename coordinate_traits<
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typename interval_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 interval_difference_type {
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typedef typename interval_difference_type_by_concept<
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GeometryType,
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typename is_interval_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_i_get : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_get,
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typename is_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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typename interval_coordinate_type<IntervalType>::type
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>::type get(const IntervalType& interval, direction_1d dir) {
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return interval_traits<IntervalType>::get(interval, dir);
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}
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struct y_i_set : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_set,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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void
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>::type set(IntervalType& interval, direction_1d dir,
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typename interval_mutable_traits<IntervalType>::coordinate_type value) {
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interval_mutable_traits<IntervalType>::set(interval, dir, value);
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}
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struct y_i_construct : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_construct,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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IntervalType
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>::type construct(
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typename interval_mutable_traits<IntervalType>::coordinate_type low,
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typename interval_mutable_traits<IntervalType>::coordinate_type high) {
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if (low > high) {
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(std::swap)(low, high);
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}
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return interval_mutable_traits<IntervalType>::construct(low, high);
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}
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struct y_i_copy_construct : gtl_yes {};
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template <typename IntervalType1, typename IntervalType2>
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typename enable_if<
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typename gtl_and_3<
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y_i_copy_construct,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType1>::type
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>::type,
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typename is_interval_concept<
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typename geometry_concept<IntervalType2>::type
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>::type
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>::type,
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IntervalType1
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>::type copy_construct(const IntervalType2& interval) {
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return construct<IntervalType1>(get(interval, LOW), get(interval, HIGH));
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}
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struct y_i_assign : gtl_yes {};
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template <typename IntervalType1, typename IntervalType2>
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typename enable_if<
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typename gtl_and_3<
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y_i_assign,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType1>::type
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>::type,
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typename is_interval_concept<
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typename geometry_concept<IntervalType2>::type
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>::type
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>::type,
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IntervalType1
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>::type& assign(IntervalType1& lvalue, const IntervalType2& rvalue) {
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set(lvalue, LOW, get(rvalue, LOW));
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set(lvalue, HIGH, get(rvalue, HIGH));
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return lvalue;
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}
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struct y_i_low : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_low,
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typename is_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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typename interval_coordinate_type<IntervalType>::type
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>::type low(const IntervalType& interval) {
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return get(interval, LOW);
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}
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struct y_i_high : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_high,
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typename is_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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typename interval_coordinate_type<IntervalType>::type
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>::type high(const IntervalType& interval) {
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return get(interval, HIGH);
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}
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struct y_i_low2 : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_low2,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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void
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>::type low(IntervalType& interval,
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typename interval_mutable_traits<IntervalType>::coordinate_type value) {
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set(interval, LOW, value);
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}
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struct y_i_high2 : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_high2,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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void
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>::type high(IntervalType& interval,
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typename interval_mutable_traits<IntervalType>::coordinate_type value) {
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set(interval, HIGH, value);
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}
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struct y_i_equivalence : gtl_yes {};
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template <typename IntervalType1, typename IntervalType2>
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typename enable_if<
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typename gtl_and_3<
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y_i_equivalence,
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typename is_interval_concept<
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typename geometry_concept<IntervalType1>::type
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>::type,
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typename is_interval_concept<
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typename geometry_concept<IntervalType2>::type
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>::type
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>::type,
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bool
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>::type equivalence(
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const IntervalType1& interval1,
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const IntervalType2& interval2) {
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return (get(interval1, LOW) == get(interval2, LOW)) &&
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(get(interval1, HIGH) == get(interval2, HIGH));
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}
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struct y_i_contains : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_contains,
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typename is_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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bool
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>::type contains(
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const IntervalType& interval,
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typename interval_coordinate_type<IntervalType>::type value,
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bool consider_touch = true ) {
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if (consider_touch) {
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return value <= high(interval) && value >= low(interval);
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} else {
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return value < high(interval) && value > low(interval);
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}
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}
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struct y_i_contains2 : gtl_yes {};
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template <typename IntervalType1, typename IntervalType2>
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typename enable_if<
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typename gtl_and_3<
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y_i_contains2,
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typename is_interval_concept<
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typename geometry_concept<IntervalType1>::type
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>::type,
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typename is_interval_concept<
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typename geometry_concept<IntervalType2>::type
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>::type
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>::type,
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bool
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>::type contains(
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const IntervalType1& interval1,
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const IntervalType2& interval2,
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bool consider_touch = true) {
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return contains(interval1, get(interval2, LOW), consider_touch) &&
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contains(interval1, get(interval2, HIGH), consider_touch);
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}
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struct y_i_center : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_center,
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typename is_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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typename interval_coordinate_type<IntervalType>::type
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>::type center(const IntervalType& interval) {
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return (high(interval) + low(interval)) / 2;
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}
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struct y_i_delta : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_delta,
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typename is_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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typename interval_difference_type<IntervalType>::type
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>::type delta(const IntervalType& interval) {
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typedef typename interval_difference_type<IntervalType>::type diff_type;
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return static_cast<diff_type>(high(interval)) -
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static_cast<diff_type>(low(interval));
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}
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struct y_i_flip : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_flip,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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IntervalType>::type& flip(
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IntervalType& interval,
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typename interval_coordinate_type<IntervalType>::type axis = 0) {
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typename interval_coordinate_type<IntervalType>::type newLow, newHigh;
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newLow = 2 * axis - high(interval);
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newHigh = 2 * axis - low(interval);
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low(interval, newLow);
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high(interval, newHigh);
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return interval;
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}
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struct y_i_scale_up : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_scale_up,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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IntervalType
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>::type& scale_up(
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IntervalType& interval,
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typename interval_coordinate_type<IntervalType>::type factor) {
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typename interval_coordinate_type<IntervalType>::type newHigh =
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high(interval) * factor;
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low(interval, low(interval) * factor);
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high(interval, (newHigh));
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return interval;
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}
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struct y_i_scale_down : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_scale_down,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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IntervalType
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>::type& scale_down(
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IntervalType& interval,
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typename interval_coordinate_type<IntervalType>::type factor) {
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typedef typename interval_coordinate_type<IntervalType>::type Unit;
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typename interval_coordinate_type<IntervalType>::type newHigh =
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high(interval) / factor;
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low(interval, low(interval) / factor);
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high(interval, (newHigh));
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return interval;
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}
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// TODO(asydorchuk): Deprecated.
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struct y_i_scale : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_scale,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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IntervalType
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>::type& scale(IntervalType& interval, double factor) {
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typedef typename interval_coordinate_type<IntervalType>::type Unit;
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Unit newHigh = scaling_policy<Unit>::round(
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static_cast<double>(high(interval)) * factor);
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low(interval, scaling_policy<Unit>::round(
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static_cast<double>(low(interval)) * factor));
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high(interval, (newHigh));
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return interval;
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}
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struct y_i_move : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_move,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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IntervalType
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>::type& move(
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IntervalType& interval,
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typename interval_difference_type<IntervalType>::type displacement) {
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typedef typename interval_coordinate_type<IntervalType>::type ctype;
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typedef typename coordinate_traits<ctype>::coordinate_difference Unit;
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low(interval, static_cast<ctype>(
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static_cast<Unit>(low(interval)) + displacement));
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high(interval, static_cast<ctype>(
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static_cast<Unit>(high(interval)) + displacement));
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return interval;
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}
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struct y_i_convolve : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_convolve,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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IntervalType
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>::type& convolve(
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IntervalType& interval,
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typename interval_coordinate_type<IntervalType>::type value) {
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typedef typename interval_coordinate_type<IntervalType>::type Unit;
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Unit newLow = low(interval) + value;
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Unit newHigh = high(interval) + value;
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low(interval, newLow);
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high(interval, newHigh);
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return interval;
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}
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struct y_i_deconvolve : gtl_yes {};
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template <typename IntervalType>
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typename enable_if<
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typename gtl_and<
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y_i_deconvolve,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType>::type
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>::type
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>::type,
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IntervalType
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>::type& deconvolve(
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IntervalType& interval,
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typename interval_coordinate_type<IntervalType>::type value) {
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typedef typename interval_coordinate_type<IntervalType>::type Unit;
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Unit newLow = low(interval) - value;
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Unit newHigh = high(interval) - value;
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low(interval, newLow);
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high(interval, newHigh);
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return interval;
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}
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struct y_i_convolve2 : gtl_yes {};
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template <typename IntervalType1, typename IntervalType2>
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typename enable_if<
|
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typename gtl_and_3<
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y_i_convolve2,
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType1>::type
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>::type,
|
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typename is_interval_concept<
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typename geometry_concept<IntervalType2>::type
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>::type
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>::type,
|
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IntervalType1
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>::type& convolve(IntervalType1& lvalue, const IntervalType2& rvalue) {
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typedef typename interval_coordinate_type<IntervalType1>::type Unit;
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Unit newLow = low(lvalue) + low(rvalue);
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Unit newHigh = high(lvalue) + high(rvalue);
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low(lvalue, newLow);
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high(lvalue, newHigh);
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return lvalue;
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}
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struct y_i_deconvolve2 : gtl_yes {};
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template <typename IntervalType1, typename IntervalType2>
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typename enable_if<
|
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typename gtl_and_3<
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y_i_deconvolve2,
|
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType1>::type
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>::type,
|
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typename is_interval_concept<
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typename geometry_concept<IntervalType2>::type
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>::type
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>::type,
|
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IntervalType1
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>::type& deconvolve(IntervalType1& lvalue, const IntervalType2& rvalue) {
|
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typedef typename interval_coordinate_type<IntervalType1>::type Unit;
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Unit newLow = low(lvalue) - low(rvalue);
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Unit newHigh = high(lvalue) - high(rvalue);
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low(lvalue, newLow);
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high(lvalue, newHigh);
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return lvalue;
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}
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struct y_i_reconvolve : gtl_yes {};
|
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template <typename IntervalType1, typename IntervalType2>
|
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typename enable_if<
|
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typename gtl_and_3<
|
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y_i_reconvolve,
|
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typename is_mutable_interval_concept<
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typename geometry_concept<IntervalType1>::type
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>::type,
|
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typename is_interval_concept<
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typename geometry_concept<IntervalType2>::type
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>::type
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>::type,
|
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IntervalType1
|
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>::type& reflected_convolve(
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IntervalType1& lvalue,
|
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const IntervalType2& rvalue) {
|
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typedef typename interval_coordinate_type<IntervalType1>::type Unit;
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Unit newLow = low(lvalue) - high(rvalue);
|
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Unit newHigh = high(lvalue) - low(rvalue);
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low(lvalue, newLow);
|
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high(lvalue, newHigh);
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return lvalue;
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}
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|
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struct y_i_redeconvolve : gtl_yes {};
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template <typename IntervalType1, typename IntervalType2>
|
|
typename enable_if<
|
|
typename gtl_and_3<
|
|
y_i_redeconvolve,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType1>::type
|
|
>::type,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType2>::type
|
|
>::type
|
|
>::type,
|
|
IntervalType1
|
|
>::type& reflected_deconvolve(
|
|
IntervalType1& lvalue,
|
|
const IntervalType2& rvalue) {
|
|
typedef typename interval_coordinate_type<IntervalType1>::type Unit;
|
|
Unit newLow = low(lvalue) + high(rvalue);
|
|
Unit newHigh = high(lvalue) + low(rvalue);
|
|
low(lvalue, newLow);
|
|
high(lvalue, newHigh);
|
|
return lvalue;
|
|
}
|
|
|
|
struct y_i_e_dist1 : gtl_yes {};
|
|
|
|
template <typename IntervalType>
|
|
typename enable_if<
|
|
typename gtl_and<y_i_e_dist1,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType>::type
|
|
>::type
|
|
>::type,
|
|
typename interval_difference_type<IntervalType>::type
|
|
>::type euclidean_distance(
|
|
const IntervalType& interval,
|
|
typename interval_coordinate_type<IntervalType>::type position) {
|
|
typedef typename interval_difference_type<IntervalType>::type Unit;
|
|
Unit dist[3] = {
|
|
0,
|
|
(Unit)low(interval) - (Unit)position,
|
|
(Unit)position - (Unit)high(interval)
|
|
};
|
|
return dist[(dist[1] > 0) + ((dist[2] > 0) << 1)];
|
|
}
|
|
|
|
struct y_i_e_dist2 : gtl_yes {};
|
|
|
|
template <typename IntervalType1, typename IntervalType2>
|
|
typename enable_if<
|
|
typename gtl_and_3<
|
|
y_i_e_dist2,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType1>::type
|
|
>::type,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType2>::type
|
|
>::type
|
|
>::type,
|
|
typename interval_difference_type<IntervalType1>::type
|
|
>::type euclidean_distance(
|
|
const IntervalType1& interval1,
|
|
const IntervalType2& interval2) {
|
|
typedef typename interval_difference_type<IntervalType1>::type Unit;
|
|
Unit dist[3] = {
|
|
0,
|
|
(Unit)low(interval1) - (Unit)high(interval2),
|
|
(Unit)low(interval2) - (Unit)high(interval1)
|
|
};
|
|
return dist[(dist[1] > 0) + ((dist[2] > 0) << 1)];
|
|
}
|
|
|
|
struct y_i_e_intersects : gtl_yes {};
|
|
|
|
template <typename IntervalType1, typename IntervalType2>
|
|
typename enable_if<
|
|
typename gtl_and_3<
|
|
y_i_e_intersects,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType1>::type
|
|
>::type,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType2>::type
|
|
>::type
|
|
>::type,
|
|
bool
|
|
>::type intersects(
|
|
const IntervalType1& interval1,
|
|
const IntervalType2& interval2,
|
|
bool consider_touch = true) {
|
|
return consider_touch ?
|
|
(low(interval1) <= high(interval2)) &&
|
|
(high(interval1) >= low(interval2)) :
|
|
(low(interval1) < high(interval2)) &&
|
|
(high(interval1) > low(interval2));
|
|
}
|
|
|
|
struct y_i_e_bintersect : gtl_yes {};
|
|
|
|
template <typename IntervalType1, typename IntervalType2>
|
|
typename enable_if<
|
|
typename gtl_and_3<
|
|
y_i_e_bintersect,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType1>::type
|
|
>::type,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType2>::type
|
|
>::type
|
|
>::type,
|
|
bool
|
|
>::type boundaries_intersect(
|
|
const IntervalType1& interval1,
|
|
const IntervalType2& interval2,
|
|
bool consider_touch = true) {
|
|
return (contains(interval1, low(interval2), consider_touch) ||
|
|
contains(interval1, high(interval2), consider_touch)) &&
|
|
(contains(interval2, low(interval1), consider_touch) ||
|
|
contains(interval2, high(interval1), consider_touch));
|
|
}
|
|
|
|
struct y_i_intersect : gtl_yes {};
|
|
|
|
template <typename IntervalType1, typename IntervalType2>
|
|
typename enable_if<
|
|
typename gtl_and_3<
|
|
y_i_intersect,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType1>::type
|
|
>::type,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType2>::type
|
|
>::type
|
|
>::type,
|
|
bool
|
|
>::type intersect(
|
|
IntervalType1& lvalue,
|
|
const IntervalType2& rvalue,
|
|
bool consider_touch = true) {
|
|
typedef typename interval_coordinate_type<IntervalType1>::type Unit;
|
|
Unit lowVal = (std::max)(low(lvalue), low(rvalue));
|
|
Unit highVal = (std::min)(high(lvalue), high(rvalue));
|
|
bool valid = consider_touch ? lowVal <= highVal : lowVal < highVal;
|
|
if (valid) {
|
|
low(lvalue, lowVal);
|
|
high(lvalue, highVal);
|
|
}
|
|
return valid;
|
|
}
|
|
|
|
struct y_i_g_intersect : gtl_yes {};
|
|
|
|
// TODO(asydorchuk): Deprecated.
|
|
template <typename IntervalType1, typename IntervalType2>
|
|
typename enable_if<
|
|
typename gtl_and_3<
|
|
y_i_g_intersect,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType1>::type
|
|
>::type,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType2>::type
|
|
>::type
|
|
>::type,
|
|
IntervalType1
|
|
>::type& generalized_intersect(
|
|
IntervalType1& lvalue,
|
|
const IntervalType2& rvalue) {
|
|
typedef typename interval_coordinate_type<IntervalType1>::type Unit;
|
|
Unit coords[4] = {low(lvalue), high(lvalue), low(rvalue), high(rvalue)};
|
|
// TODO(asydorchuk): consider implementing faster sorting of small
|
|
// fixed length range.
|
|
polygon_sort(coords, coords+4);
|
|
low(lvalue, coords[1]);
|
|
high(lvalue, coords[2]);
|
|
return lvalue;
|
|
}
|
|
|
|
struct y_i_abuts1 : gtl_yes {};
|
|
|
|
template <typename IntervalType1, typename IntervalType2>
|
|
typename enable_if<
|
|
typename gtl_and_3<
|
|
y_i_abuts1,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType1>::type
|
|
>::type,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType2>::type
|
|
>::type
|
|
>::type,
|
|
bool
|
|
>::type abuts(
|
|
const IntervalType1& interval1,
|
|
const IntervalType2& interval2,
|
|
direction_1d dir) {
|
|
return dir.to_int() ? low(interval2) == high(interval1) :
|
|
low(interval1) == high(interval2);
|
|
}
|
|
|
|
struct y_i_abuts2 : gtl_yes {};
|
|
|
|
template <typename IntervalType1, typename IntervalType2>
|
|
typename enable_if<
|
|
typename gtl_and_3<
|
|
y_i_abuts2,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType1>::type
|
|
>::type,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType2>::type
|
|
>::type
|
|
>::type,
|
|
bool
|
|
>::type abuts(
|
|
const IntervalType1& interval1,
|
|
const IntervalType2& interval2) {
|
|
return abuts(interval1, interval2, HIGH) ||
|
|
abuts(interval1, interval2, LOW);
|
|
}
|
|
|
|
struct y_i_bloat : gtl_yes {};
|
|
|
|
template <typename IntervalType>
|
|
typename enable_if<
|
|
typename gtl_and<
|
|
y_i_bloat,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType>::type
|
|
>::type
|
|
>::type,
|
|
IntervalType
|
|
>::type& bloat(
|
|
IntervalType& interval,
|
|
typename interval_coordinate_type<IntervalType>::type bloating) {
|
|
low(interval, low(interval) - bloating);
|
|
high(interval, high(interval) + bloating);
|
|
return interval;
|
|
}
|
|
|
|
struct y_i_bloat2 : gtl_yes {};
|
|
|
|
template <typename IntervalType>
|
|
typename enable_if<
|
|
typename gtl_and<
|
|
y_i_bloat2,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType>::type
|
|
>::type
|
|
>::type,
|
|
IntervalType
|
|
>::type& bloat(
|
|
IntervalType& interval,
|
|
direction_1d dir,
|
|
typename interval_coordinate_type<IntervalType>::type bloating) {
|
|
set(interval, dir, get(interval, dir) + dir.get_sign() * bloating);
|
|
return interval;
|
|
}
|
|
|
|
struct y_i_shrink : gtl_yes {};
|
|
|
|
template <typename IntervalType>
|
|
typename enable_if<
|
|
typename gtl_and<
|
|
y_i_shrink,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType>::type
|
|
>::type
|
|
>::type,
|
|
IntervalType
|
|
>::type& shrink(
|
|
IntervalType& interval,
|
|
typename interval_coordinate_type<IntervalType>::type shrinking) {
|
|
return bloat(interval, -shrinking);
|
|
}
|
|
|
|
struct y_i_shrink2 : gtl_yes {};
|
|
|
|
template <typename IntervalType>
|
|
typename enable_if<
|
|
typename gtl_and<
|
|
y_i_shrink2,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType>::type
|
|
>::type
|
|
>::type,
|
|
IntervalType
|
|
>::type& shrink(
|
|
IntervalType& interval,
|
|
direction_1d dir,
|
|
typename interval_coordinate_type<IntervalType>::type shrinking) {
|
|
return bloat(interval, dir, -shrinking);
|
|
}
|
|
|
|
struct y_i_encompass : gtl_yes {};
|
|
|
|
template <typename IntervalType1, typename IntervalType2>
|
|
typename enable_if<
|
|
typename gtl_and_3<
|
|
y_i_encompass,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType1>::type
|
|
>::type,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType2>::type
|
|
>::type
|
|
>::type,
|
|
bool
|
|
>::type encompass(IntervalType1& interval1, const IntervalType2& interval2) {
|
|
bool retval = !contains(interval1, interval2, true);
|
|
low(interval1, (std::min)(low(interval1), low(interval2)));
|
|
high(interval1, (std::max)(high(interval1), high(interval2)));
|
|
return retval;
|
|
}
|
|
|
|
struct y_i_encompass2 : gtl_yes {};
|
|
|
|
template <typename IntervalType>
|
|
typename enable_if<
|
|
typename gtl_and<
|
|
y_i_encompass2,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType>::type
|
|
>::type
|
|
>::type,
|
|
bool
|
|
>::type encompass(
|
|
IntervalType& interval,
|
|
typename interval_coordinate_type<IntervalType>::type value) {
|
|
bool retval = !contains(interval, value, true);
|
|
low(interval, (std::min)(low(interval), value));
|
|
high(interval, (std::max)(high(interval), value));
|
|
return retval;
|
|
}
|
|
|
|
struct y_i_get_half : gtl_yes {};
|
|
|
|
template <typename IntervalType>
|
|
typename enable_if<
|
|
typename gtl_and<
|
|
y_i_get_half,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType>::type
|
|
>::type
|
|
>::type,
|
|
IntervalType
|
|
>::type get_half(const IntervalType& interval, direction_1d dir) {
|
|
typedef typename interval_coordinate_type<IntervalType>::type Unit;
|
|
Unit c = (get(interval, LOW) + get(interval, HIGH)) / 2;
|
|
return construct<IntervalType>(
|
|
(dir == LOW) ? get(interval, LOW) : c,
|
|
(dir == LOW) ? c : get(interval, HIGH));
|
|
}
|
|
|
|
struct y_i_join_with : gtl_yes {};
|
|
|
|
template <typename IntervalType1, typename IntervalType2>
|
|
typename enable_if<
|
|
typename gtl_and_3<
|
|
y_i_join_with,
|
|
typename is_mutable_interval_concept<
|
|
typename geometry_concept<IntervalType1>::type
|
|
>::type,
|
|
typename is_interval_concept<
|
|
typename geometry_concept<IntervalType2>::type
|
|
>::type>::type,
|
|
bool
|
|
>::type join_with(IntervalType1& interval1, const IntervalType2& interval2) {
|
|
if (abuts(interval1, interval2)) {
|
|
encompass(interval1, interval2);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
} // polygon
|
|
} // boost
|
|
|
|
#endif // BOOST_POLYGON_INTERVAL_CONCEPT_HPP
|