/// <summary>
///
/// </summary>
/// <param name="x"></param>
/// <param name="insertEvent"></param>
/// <param name="sweepInt"></param>
public SweepLineEvent(double x, SweepLineEvent insertEvent, SweepLineInterval sweepInt)
{
_xValue = x;
_insertEvent = insertEvent;
_eventType = insertEvent != null ? SweepLineEventType.Delete : SweepLineEventType.Insert;
_sweepInt = 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;
_insertEvent = insertEvent;
_eventType = insertEvent != null ? SweepLineEventType.Delete : SweepLineEventType.Insert;
_sweepInt = sweepInt;
}
/// <summary>
///
/// </summary>
/// <param name="sweepInt"></param>
public virtual void Add(SweepLineInterval sweepInt)
{
SweepLineEvent insertEvent = new SweepLineEvent(sweepInt.Min, null, sweepInt);
_events.Add(insertEvent);
_events.Add(new SweepLineEvent(sweepInt.Max, insertEvent, 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++)
{
SweepLineEvent ev = (SweepLineEvent)_events[i];
if (ev.IsInsert)
{
SweepLineInterval s1 = ev.Interval;
action.Overlap(s0, s1);
_nOverlaps++;
}
}
}
/// <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++)
{
SweepLineEvent ev = (SweepLineEvent)_events[i];
if (ev.IsInsert)
{
SweepLineInterval s1 = ev.Interval;
action.Overlap(s0, s1);
_nOverlaps++;
}
}
}
/// <summary>
///
/// </summary>
/// <param name="sweepInt"></param>
public virtual void Add(SweepLineInterval sweepInt)
{
SweepLineEvent insertEvent = new SweepLineEvent(sweepInt.Min, null, sweepInt);
_events.Add(insertEvent);
_events.Add(new SweepLineEvent(sweepInt.Max, insertEvent, sweepInt));
}
/// <summary>
///
/// </summary>
private void BuildIndex()
{
_sweepLine = new SweepLineIndex();
for (int i = 0; i < _rings.Count; i++)
{
LinearRing ring = (LinearRing)_rings[i];
IEnvelope env = ring.EnvelopeInternal;
SweepLineInterval sweepInt = new SweepLineInterval(env.Minimum.X, env.Maximum.X, ring);
_sweepLine.Add(sweepInt);
}
}
/// <summary>
///
/// </summary>
/// <param name="s0"></param>
/// <param name="s1"></param>
public virtual void Overlap(SweepLineInterval s0, SweepLineInterval s1)
{
LinearRing innerRing = (LinearRing)s0.Item;
LinearRing searchRing = (LinearRing)s1.Item;
if (innerRing == searchRing)
return;
if (_container.IsInside(innerRing, searchRing))
_isNonNested = false;
}
