CGAL 6.0.1 - Spatial Sorting
|
All 2D spatial sorting algorithms provided in CGAL are parameterized by a traits class Traits
, which defines the primitives (objects and predicates) that the sorting algorithms use. SpatialSortingTraits_2
defines the complete set of primitives required in these functions and functors.
Kernel
CGAL::Spatial_sort_traits_adapter_2<Base_traits,PointPropertyMap>
Types | |
typedef unspecified_type | Point_2 |
The point type on which the sorting algorithms operate. | |
typedef unspecified_type | Compute_x_2 |
Functor object type returning the x coordinate of a Point_2 . | |
typedef unspecified_type | Compute_y_2 |
Functor object type returning the y coordinate of a Point_2 . | |
typedef unspecified_type | Less_x_2 |
Binary predicate object type comparing Point_2 s along the x coordinate. | |
typedef unspecified_type | Less_y_2 |
Binary predicate object type comparing Point_2 s along the y coordinate. | |
Creation | |
Only a copy constructor is required. | |
SpatialSortingTraits_2 (const SpatialSortingTraits_2 &t) | |
Operations | |
The following member functions to create instances of the above predicate object types must exist. | |
Compute_x_2 | compute_x_2_object () |
Compute_y_2 | compute_y_2_object () |
Less_x_2 | less_x_2_object () |
Less_y_2 | less_y_2_object () |
Functor object type returning the x coordinate of a Point_2
.
Must provide FT operator()(Point_2 p)
where FT
can be used as argument of CGAL::to_double
.
Functor object type returning the y coordinate of a Point_2
.
Must provide FT operator()(Point_2 p)
where FT
can be used as argument of CGAL::to_double
.
Binary predicate object type comparing Point_2
s along the x coordinate.
Must provide bool operator()(Point_2 p, Point_2 q)
where true
is returned iff p_x < q_x, where p_x and q_x denote x coordinate of point p and q, respectively.
Binary predicate object type comparing Point_2
s along the y coordinate.
Must provide bool operator()(Point_2 p, Point_2 q)
where true
is returned iff p_y < q_y, where p_y and q_y denote y coordinate of point p and q, respectively.