An interval tree can be used to efficiently find a set of numeric intervals overlapping or containing another interval.
This library provides a basic implementation of an interval tree using C++ templates, allowing the insertion of arbitrary types into the tree.
#include "IntervalTree.h" to the source files in which you will use the interval tree.
To make an IntervalTree to contain objects of class T, use:
vector<Interval<T> > intervals; T a, b, c; intervals.push_back(Interval<T>(2, 10, a)); intervals.push_back(Interval<T>(3, 4, b)); intervals.push_back(Interval<T>(20, 100, c)); IntervalTree<T> tree; tree = IntervalTree<T>(intervals);
Now, it's possible to query the tree and obtain a set of intervals which are contained within the start and stop coordinates.
vector<Interval<T> > results; tree.findContained(start, stop, results); cout << "found " << results.size() << " overlapping intervals" << endl;
The function IntervalTree::findOverlapping provides a method to find all those intervals which are contained or partially overlap the interval (start, stop).