/*
* /// <summary>
* ///
* /// </summary>
* public SweepLineIndex() { }
*/
/// <summary>
///
/// </summary>
/// <param name="sweepInt"></param>
public void Add(SweepLineInterval sweepInt)
{
var insertEvent = new SweepLineEvent(sweepInt.Min, null, sweepInt);
_events.Add(insertEvent);
_events.Add(new SweepLineEvent(sweepInt.Max, insertEvent, sweepInt));
}
/// <summary>
///
/// </summary>
/// <param name="x"></param>
/// <param name="insertEvent"></param>
/// <param name="sweepInt"></param>
public SweepLineEvent(double x, SweepLineEvent insertEvent, SweepLineInterval sweepInt)
{
xValue = x;
this.insertEvent = insertEvent;
if (insertEvent != null)
{
eventType = SweepLineEvents.Delete;
}
else
{
eventType = SweepLineEvents.Insert;
}
this.sweepInt = sweepInt;
}
/// <summary>
///
/// </summary>
/// <param name="start"></param>
/// <param name="end"></param>
/// <param name="s0"></param>
/// <param name="action"></param>
private void ProcessOverlaps(int start, int end, SweepLineInterval s0, ISweepLineOverlapAction action)
{
/*
* Since we might need to test for self-intersections,
* include current insert event object in list of event objects to test.
* Last index can be skipped, because it must be a Delete event.
*/
for (int i = start; i < end; i++)
{
var ev = _events[i];
if (ev.IsInsert)
{
var s1 = ev.Interval;
action.Overlap(s0, s1);
_nOverlaps++;
}
}
}