/* | |
Copyright 2008 Intel Corporation | |
Use, modification and distribution are 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_POLYGON_INTERVAL_CONCEPT_HPP | |
#define BOOST_POLYGON_INTERVAL_CONCEPT_HPP | |
#include "isotropy.hpp" | |
#include "interval_data.hpp" | |
#include "interval_traits.hpp" | |
namespace boost { namespace polygon{ | |
struct interval_concept {}; | |
template <typename T> | |
struct is_interval_concept { typedef gtl_no type; }; | |
template <> | |
struct is_interval_concept<interval_concept> { typedef gtl_yes type; }; | |
template <typename T> | |
struct is_mutable_interval_concept { typedef gtl_no type; }; | |
template <> | |
struct is_mutable_interval_concept<interval_concept> { typedef gtl_yes type; }; | |
template <typename T, typename CT> | |
struct interval_coordinate_type_by_concept { typedef void type; }; | |
template <typename T> | |
struct interval_coordinate_type_by_concept<T, gtl_yes> { typedef typename interval_traits<T>::coordinate_type type; }; | |
template <typename T> | |
struct interval_coordinate_type { | |
typedef typename interval_coordinate_type_by_concept< | |
T, typename is_interval_concept<typename geometry_concept<T>::type>::type>::type type; | |
}; | |
template <typename T, typename CT> | |
struct interval_difference_type_by_concept { typedef void type; }; | |
template <typename T> | |
struct interval_difference_type_by_concept<T, gtl_yes> { | |
typedef typename coordinate_traits<typename interval_traits<T>::coordinate_type>::coordinate_difference type; }; | |
template <typename T> | |
struct interval_difference_type { | |
typedef typename interval_difference_type_by_concept< | |
T, typename is_interval_concept<typename geometry_concept<T>::type>::type>::type type; | |
}; | |
template <typename T> | |
typename interval_coordinate_type<T>::type | |
get(const T& interval, direction_1d dir, | |
typename enable_if<typename gtl_if<typename is_interval_concept<typename geometry_concept<T>::type>::type>::type>::type * = 0 | |
) { | |
return interval_traits<T>::get(interval, dir); | |
} | |
template <typename T, typename coordinate_type> | |
void | |
set(T& interval, direction_1d dir, coordinate_type value, | |
typename enable_if<typename is_mutable_interval_concept<typename geometry_concept<T>::type>::type>::type * = 0 | |
) { | |
//this may need to be refined | |
interval_mutable_traits<T>::set(interval, dir, value); | |
if(high(interval) < low(interval)) | |
interval_mutable_traits<T>::set(interval, dir.backward(), value); | |
} | |
template <typename T, typename T2, typename T3> | |
T | |
construct(T2 low_value, T3 high_value, | |
typename enable_if<typename is_mutable_interval_concept<typename geometry_concept<T>::type>::type>::type * = 0 | |
) { | |
if(low_value > high_value) std::swap(low_value, high_value); | |
return interval_mutable_traits<T>::construct(low_value, high_value); | |
} | |
template <typename T, typename T2> | |
T | |
copy_construct(const T2& interval, | |
typename enable_if< typename gtl_and<typename is_mutable_interval_concept<typename geometry_concept<T>::type>::type, | |
typename is_interval_concept<typename geometry_concept<T2>::type>::type>::type>::type * = 0 | |
) { | |
return construct<T> | |
(get(interval, LOW ), | |
get(interval, HIGH)); | |
} | |
template <typename T1, typename T2> | |
T1 & | |
assign(T1& lvalue, const T2& rvalue, | |
typename enable_if< typename gtl_and< typename is_mutable_interval_concept<typename geometry_concept<T1>::type>::type, | |
typename is_interval_concept<typename geometry_concept<T2>::type>::type>::type>::type * = 0) { | |
lvalue = copy_construct<T1>(rvalue); | |
return lvalue; | |
} | |
template <typename T, typename T2> | |
bool | |
equivalence(const T& interval1, const T2& interval2, | |
typename enable_if< typename gtl_and< typename is_interval_concept<typename geometry_concept<T>::type>::type, | |
typename is_interval_concept<typename geometry_concept<T2>::type>::type>::type>::type * = 0 | |
) { | |
return get(interval1, LOW) == | |
get(interval2, LOW) && | |
get(interval1, HIGH) == | |
get(interval2, HIGH); | |
} | |
struct y_i_contains : gtl_yes {}; | |
template <typename interval_type> | |
typename enable_if< typename gtl_and< y_i_contains, typename is_interval_concept<typename geometry_concept<interval_type>::type>::type >::type, bool>::type | |
contains(const interval_type& interval, | |
typename interval_traits<interval_type>::coordinate_type value, | |
bool consider_touch = true ) { | |
if(consider_touch) { | |
return value <= high(interval) && value >= low(interval); | |
} else { | |
return value < high(interval) && value > low(interval); | |
} | |
} | |
template <typename interval_type, typename interval_type_2> | |
bool | |
contains(const interval_type& interval, | |
const interval_type_2& value, bool consider_touch = true, | |
typename enable_if< typename gtl_and< typename is_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type>::type * = 0 | |
) { | |
return contains(interval, get(value, LOW), consider_touch) && | |
contains(interval, get(value, HIGH), consider_touch); | |
} | |
// get the low coordinate | |
template <typename interval_type> | |
typename interval_traits<interval_type>::coordinate_type | |
low(const interval_type& interval, | |
typename enable_if< typename is_interval_concept<typename geometry_concept<interval_type>::type>::type>::type * = 0 | |
) { return get(interval, LOW); } | |
// get the high coordinate | |
template <typename interval_type> | |
typename interval_traits<interval_type>::coordinate_type | |
high(const interval_type& interval, | |
typename enable_if< typename is_interval_concept<typename geometry_concept<interval_type>::type>::type>::type * = 0 | |
) { return get(interval, HIGH); } | |
// get the center coordinate | |
template <typename interval_type> | |
typename interval_traits<interval_type>::coordinate_type | |
center(const interval_type& interval, | |
typename enable_if< typename is_interval_concept<typename geometry_concept<interval_type>::type>::type>::type * = 0 | |
) { return (high(interval) + low(interval))/2; } | |
struct y_i_low : gtl_yes {}; | |
// set the low coordinate to v | |
template <typename interval_type> | |
typename enable_if<typename gtl_and<y_i_low, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, void>::type | |
low(interval_type& interval, | |
typename interval_traits<interval_type>::coordinate_type v) { set(interval, LOW, v); } | |
struct y_i_high : gtl_yes {}; | |
// set the high coordinate to v | |
template <typename interval_type> | |
typename enable_if<typename gtl_and<y_i_high, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, void>::type | |
high(interval_type& interval, | |
typename interval_traits<interval_type>::coordinate_type v) { set(interval, HIGH, v); } | |
// get the magnitude of the interval | |
template <typename interval_type> | |
typename interval_difference_type<interval_type>::type | |
delta(const interval_type& interval, | |
typename enable_if< typename is_interval_concept<typename geometry_concept<interval_type>::type>::type>::type * = 0 | |
) { | |
typedef typename coordinate_traits<typename interval_traits<interval_type>::coordinate_type>::coordinate_difference diffT; | |
return (diffT)high(interval) - (diffT)low(interval); } | |
struct y_i_flip : gtl_yes {}; | |
// flip this about coordinate | |
template <typename interval_type> | |
typename enable_if<typename gtl_and<y_i_flip, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, interval_type>::type & | |
flip(interval_type& interval, | |
typename interval_traits<interval_type>::coordinate_type axis = 0) { | |
typename interval_traits<interval_type>::coordinate_type newLow, newHigh; | |
newLow = 2 * axis - high(interval); | |
newHigh = 2 * axis - low(interval); | |
low(interval, newLow); | |
high(interval, newHigh); | |
return interval; | |
} | |
struct y_i_scale_up : gtl_yes {}; | |
// scale interval by factor | |
template <typename interval_type> | |
typename enable_if<typename gtl_and<y_i_scale_up, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, interval_type>::type & | |
scale_up(interval_type& interval, | |
typename coordinate_traits<typename interval_traits<interval_type>::coordinate_type>::unsigned_area_type factor) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit newHigh = high(interval) * (Unit)factor; | |
low(interval, low(interval) * (Unit)factor); | |
high(interval, (newHigh)); | |
return interval; | |
} | |
struct y_i_scale_down : gtl_yes {}; | |
template <typename interval_type> | |
typename enable_if<typename gtl_and<y_i_scale_down, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, interval_type>::type & | |
scale_down(interval_type& interval, | |
typename coordinate_traits<typename interval_traits<interval_type>::coordinate_type>::unsigned_area_type factor) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
typedef typename coordinate_traits<Unit>::coordinate_distance dt; | |
Unit newHigh = scaling_policy<Unit>::round((dt)(high(interval)) / (dt)factor); | |
low(interval, scaling_policy<Unit>::round((dt)(low(interval)) / (dt)factor)); | |
high(interval, (newHigh)); | |
return interval; | |
} | |
struct y_i_scale : gtl_yes {}; | |
template <typename interval_type> | |
typename enable_if<typename gtl_and<y_i_scale, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, interval_type>::type & | |
scale(interval_type& interval, double factor) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit newHigh = scaling_policy<Unit>::round((double)(high(interval)) * factor); | |
low(interval, scaling_policy<Unit>::round((double)low(interval)* factor)); | |
high(interval, (newHigh)); | |
return interval; | |
} | |
// move interval by delta | |
template <typename interval_type> | |
interval_type& | |
move(interval_type& interval, | |
typename interval_difference_type<interval_type>::type displacement, | |
typename enable_if<typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type * = 0 | |
) { | |
typedef typename interval_traits<interval_type>::coordinate_type ctype; | |
typedef typename coordinate_traits<ctype>::coordinate_difference Unit; | |
Unit len = delta(interval); | |
low(interval, static_cast<ctype>(static_cast<Unit>(low(interval)) + displacement)); | |
high(interval, static_cast<ctype>(static_cast<Unit>(low(interval)) + len)); | |
return interval; | |
} | |
struct y_i_convolve : gtl_yes {}; | |
// convolve this with b | |
template <typename interval_type> | |
typename enable_if<typename gtl_and<y_i_convolve, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, interval_type>::type & | |
convolve(interval_type& interval, | |
typename interval_traits<interval_type>::coordinate_type b) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit newLow = low(interval) + b; | |
Unit newHigh = high(interval) + b; | |
low(interval, newLow); | |
high(interval, newHigh); | |
return interval; | |
} | |
struct y_i_deconvolve : gtl_yes {}; | |
// deconvolve this with b | |
template <typename interval_type> | |
typename enable_if<typename gtl_and<y_i_deconvolve, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, interval_type>::type & | |
deconvolve(interval_type& interval, | |
typename interval_traits<interval_type>::coordinate_type b) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit newLow = low(interval) - b; | |
Unit newHigh = high(interval) - b; | |
low(interval, newLow); | |
high(interval, newHigh); | |
return interval; | |
} | |
struct y_i_convolve2 : gtl_yes {}; | |
// convolve this with b | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< | |
typename gtl_and_3<y_i_convolve2, | |
typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
interval_type>::type & | |
convolve(interval_type& interval, | |
const interval_type_2& b) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit newLow = low(interval) + low(b); | |
Unit newHigh = high(interval) + high(b); | |
low(interval, newLow); | |
high(interval, newHigh); | |
return interval; | |
} | |
struct y_i_deconvolve2 : gtl_yes {}; | |
// deconvolve this with b | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< | |
typename gtl_and_3< y_i_deconvolve2, | |
typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
interval_type>::type & | |
deconvolve(interval_type& interval, | |
const interval_type_2& b) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit newLow = low(interval) - low(b); | |
Unit newHigh = high(interval) - high(b); | |
low(interval, newLow); | |
high(interval, newHigh); | |
return interval; | |
} | |
struct y_i_reconvolve : gtl_yes {}; | |
// reflected convolve this with b | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< | |
typename gtl_and_3<y_i_reconvolve, | |
typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
interval_type>::type & | |
reflected_convolve(interval_type& interval, | |
const interval_type_2& b) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit newLow = low(interval) - high(b); | |
Unit newHigh = high(interval) - low(b); | |
low(interval, newLow); | |
high(interval, newHigh); | |
return interval; | |
} | |
struct y_i_redeconvolve : gtl_yes {}; | |
// reflected deconvolve this with b | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< | |
typename gtl_and_3< y_i_redeconvolve, | |
typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
interval_type>::type & | |
reflected_deconvolve(interval_type& interval, | |
const interval_type_2& b) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit newLow = low(interval) + high(b); | |
Unit newHigh = high(interval) + low(b); | |
low(interval, newLow); | |
high(interval, newHigh); | |
return interval; | |
} | |
struct y_i_e_dist1 : gtl_yes {}; | |
// distance from a coordinate to an interval | |
template <typename interval_type> | |
typename enable_if< typename gtl_and<y_i_e_dist1, typename is_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, | |
typename interval_difference_type<interval_type>::type>::type | |
euclidean_distance(const interval_type& interval, | |
typename interval_traits<interval_type>::coordinate_type position) { | |
typedef typename coordinate_traits<typename interval_traits<interval_type>::coordinate_type>::coordinate_difference 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 {}; | |
// distance between two intervals | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< | |
typename gtl_and_3<y_i_e_dist2, typename is_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
typename interval_difference_type<interval_type>::type>::type | |
euclidean_distance(const interval_type& interval, | |
const interval_type_2& b) { | |
typedef typename coordinate_traits<typename interval_traits<interval_type>::coordinate_type>::coordinate_difference Unit; | |
Unit dist[3] = {0, (Unit)low(interval) - (Unit)high(b), (Unit)low(b) - (Unit)high(interval)}; | |
return dist[ (dist[1] > 0) + ((dist[2] > 0) << 1) ]; | |
} | |
struct y_i_e_intersects : gtl_yes {}; | |
// check if Interval b intersects `this` Interval | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< | |
typename gtl_and_3<y_i_e_intersects, typename is_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
bool>::type | |
intersects(const interval_type& interval, const interval_type_2& b, | |
bool consider_touch = true) { | |
return consider_touch ? | |
(low(interval) <= high(b)) & (high(interval) >= low(b)) : | |
(low(interval) < high(b)) & (high(interval) > low(b)); | |
} | |
struct y_i_e_bintersect : gtl_yes {}; | |
// check if Interval b partially overlaps `this` Interval | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< | |
typename gtl_and_3<y_i_e_bintersect, typename is_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
bool>::type | |
boundaries_intersect(const interval_type& interval, const interval_type_2& b, | |
bool consider_touch = true) { | |
return (contains(interval, low(b), consider_touch) || | |
contains(interval, high(b), consider_touch)) && | |
(contains(b, low(interval), consider_touch) || | |
contains(b, high(interval), consider_touch)); | |
} | |
struct y_i_abuts1 : gtl_yes {}; | |
// check if they are end to end | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< typename gtl_and_3<y_i_abuts1, typename is_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
bool>::type | |
abuts(const interval_type& interval, const interval_type_2& b, direction_1d dir) { | |
return dir.to_int() ? low(b) == high(interval) : low(interval) == high(b); | |
} | |
struct y_i_abuts2 : gtl_yes {}; | |
// check if they are end to end | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< | |
typename gtl_and_3<y_i_abuts2, typename is_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
bool>::type | |
abuts(const interval_type& interval, const interval_type_2& b) { | |
return abuts(interval, b, HIGH) || abuts(interval, b, LOW); | |
} | |
struct y_i_intersect : gtl_yes {}; | |
// set 'this' interval to the intersection of 'this' and b | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< typename gtl_and_3<y_i_intersect, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
bool>::type | |
intersect(interval_type& interval, const interval_type_2& b, bool consider_touch = true) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit lowVal = (std::max)(low(interval), low(b)); | |
Unit highVal = (std::min)(high(interval), high(b)); | |
bool valid = consider_touch ? | |
lowVal <= highVal : | |
lowVal < highVal; | |
if(valid) { | |
low(interval, lowVal); | |
high(interval, highVal); | |
} | |
return valid; | |
} | |
struct y_i_g_intersect : gtl_yes {}; | |
// set 'this' interval to the generalized intersection of 'this' and b | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< | |
typename gtl_and_3<y_i_g_intersect, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
interval_type>::type & | |
generalized_intersect(interval_type& interval, const interval_type_2& b) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit coords[4] = {low(interval), high(interval), low(b), high(b)}; | |
//consider implementing faster sorting of small fixed length range | |
gtlsort(coords, coords+4); | |
low(interval, coords[1]); | |
high(interval, coords[2]); | |
return interval; | |
} | |
struct y_i_bloat : gtl_yes {}; | |
// bloat the Interval | |
template <typename interval_type> | |
typename enable_if< typename gtl_and<y_i_bloat, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, | |
interval_type>::type & | |
bloat(interval_type& interval, typename interval_traits<interval_type>::coordinate_type bloating) { | |
low(interval, low(interval)-bloating); | |
high(interval, high(interval)+bloating); | |
return interval; | |
} | |
struct y_i_bloat2 : gtl_yes {}; | |
// bloat the specified side of `this` Interval | |
template <typename interval_type> | |
typename enable_if< typename gtl_and<y_i_bloat2, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, | |
interval_type>::type & | |
bloat(interval_type& interval, direction_1d dir, typename interval_traits<interval_type>::coordinate_type bloating) { | |
set(interval, dir, get(interval, dir) + dir.get_sign() * bloating); | |
return interval; | |
} | |
struct y_i_shrink : gtl_yes {}; | |
// shrink the Interval | |
template <typename interval_type> | |
typename enable_if< typename gtl_and<y_i_shrink, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, | |
interval_type>::type & | |
shrink(interval_type& interval, typename interval_traits<interval_type>::coordinate_type shrinking) { | |
return bloat(interval, -shrinking); | |
} | |
struct y_i_shrink2 : gtl_yes {}; | |
// shrink the specified side of `this` Interval | |
template <typename interval_type> | |
typename enable_if< typename gtl_and<y_i_shrink2, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, | |
interval_type>::type & | |
shrink(interval_type& interval, direction_1d dir, typename interval_traits<interval_type>::coordinate_type shrinking) { | |
return bloat(interval, dir, -shrinking); | |
} | |
// Enlarge `this` Interval to encompass the specified Interval | |
template <typename interval_type, typename interval_type_2> | |
bool | |
encompass(interval_type& interval, const interval_type_2& b, | |
typename enable_if< | |
typename gtl_and< typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type>::type * = 0 | |
) { | |
bool retval = !contains(interval, b, true); | |
low(interval, (std::min)(low(interval), low(b))); | |
high(interval, (std::max)(high(interval), high(b))); | |
return retval; | |
} | |
struct y_i_encompass : gtl_yes {}; | |
// Enlarge `this` Interval to encompass the specified Interval | |
template <typename interval_type> | |
typename enable_if< typename gtl_and<y_i_encompass, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, | |
bool>::type | |
encompass(interval_type& interval, typename interval_traits<interval_type>::coordinate_type b) { | |
bool retval = !contains(interval, b, true); | |
low(interval, (std::min)(low(interval), b)); | |
high(interval, (std::max)(high(interval), b)); | |
return retval; | |
} | |
struct y_i_get_half : gtl_yes {}; | |
// gets the half of the interval as an interval | |
template <typename interval_type> | |
typename enable_if<typename gtl_and<y_i_get_half, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type>::type, interval_type>::type | |
get_half(const interval_type& interval, direction_1d d1d) { | |
typedef typename interval_traits<interval_type>::coordinate_type Unit; | |
Unit c = (get(interval, LOW) + get(interval, HIGH)) / 2; | |
return construct<interval_type>((d1d == LOW) ? get(interval, LOW) : c, | |
(d1d == LOW) ? c : get(interval, HIGH)); | |
} | |
struct y_i_join_with : gtl_yes {}; | |
// returns true if the 2 intervals exactly touch at one value, like in l1 <= h1 == l2 <= h2 | |
// sets the argument to the joined interval | |
template <typename interval_type, typename interval_type_2> | |
typename enable_if< | |
typename gtl_and_3<y_i_join_with, typename is_mutable_interval_concept<typename geometry_concept<interval_type>::type>::type, | |
typename is_interval_concept<typename geometry_concept<interval_type_2>::type>::type>::type, | |
bool>::type | |
join_with(interval_type& interval, const interval_type_2& b) { | |
if(abuts(interval, b)) { | |
encompass(interval, b); | |
return true; | |
} | |
return false; | |
} | |
template <class T> | |
template <class T2> | |
interval_data<T>& interval_data<T>::operator=(const T2& rvalue) { | |
assign(*this, rvalue); | |
return *this; | |
} | |
template <typename T> | |
struct geometry_concept<interval_data<T> > { | |
typedef interval_concept type; | |
}; | |
} | |
} | |
#endif |