/**
* Because Delete Events have a link to their corresponding Insert event, it is possible to
* compute exactly the range of events which must be compared to a given Insert event object.
*/
private void prepareEvents() {
Collections.sort(events);
for (int i = 0; i < events.size(); i++) {
SweepLineEvent ev = (SweepLineEvent) events.get(i);
if (ev.isDelete()) {
ev.getInsertEvent().setDeleteEventIndex(i);
}
}
}
