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An object of the class Range_tree_k is a k-dimensional range tree that can store k-dimensional keys of type Key. The class allows to perform window queries on the keys. The class Range_tree_k is parameterized with a range tree traits class Traits that defines, among other things, the type of the Key.
Cgal provides traits class implementations that allow to use the range tree with point classes from the Cgal kernel as keys. These classes are CGAL::Range_segment_tree_traits_set_2<R>, CGAL::Range_segment_tree_traits_set_3<R>, CGAL::Range_tree_traits_map_2<R> and CGAL::Range_tree_traits_map_3<R>. The concept RangeSegmentTreeTraits_d defines the requirements that range tree traits classes must fulfill. This allows the advanced user to develop further range tree traits classes.
#include <CGAL/Range_tree_k.h>
| Range_tree_k<Traits>::Traits | |
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the type of the range tree traits class.
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| typedef Traits::Key | Key; | |
| typedef Traits::Interval | Interval; | |
| Range_tree_k<Traits> R; | |||
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Introduces an empty range tree R.
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| template < class ForwardIterator > | |||
| Range_tree_k<Traits> R ( ForwardIterator first, ForwardIterator last); | |||
Introduces a range tree R and initializes it with the data
in the range [first, last).
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| template < class ForwardIterator > | ||||
| void | R.make_tree ( ForwardIterator first, ForwardIterator last) | |||
Introduces a range tree R and initializes it with the data
in the range [first, last). This function can only be applied
once on an empty range tree.
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| template < class OutputIterator > | ||||
| OutputIterator | R.window_query ( Interval window, OutputIterator out) | |||
writes all data that are in the interval window to the container
where out points to, and returns an output iterator that points
to the last location the function wrote to.
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#include <CGAL/Cartesian.h>
#include <CGAL/Range_segment_tree_traits.h>
#include <CGAL/Range_tree_k.h>
typedef CGAL::Cartesian<double> K;
typedef CGAL::Range_tree_map_traits_2<K, char> Traits;
typedef CGAL::Range_tree_2<Traits> Range_tree_2_type;
int main()
{
typedef Traits::Key Key;
typedef Traits::Interval Interval;
std::vector<Key> InputList, OutputList;
InputList.push_back(Key(K::Point_2(8,5.1), 'a'));
InputList.push_back(Key(K::Point_2(1,1.1), 'b'));
InputList.push_back(Key(K::Point_2(3,2.1), 'c'));
Range_tree_2_type Range_tree_2(InputList.begin(),InputList.end());
Interval win(Interval(K::Point_2(4,8.1), K::Point_2(5,8.2)));
std::cout << "\n Window Query:\n ";
Range_tree_2.window_query(win, std::back_inserter(OutputList));
std::vector<Key>::iterator current=OutputList.begin();
while(current!=OutputList.end()){
std::cout << (*current).first.x() << "," << (*current).first.y()
<< ":" << (*current++).second << std::endl;
}
}