public bool HasIntersections()
{
while (!events.IsEmpty)
{
var currentEvent = events.DeleteMin();
switch (currentEvent.Type)
{
case EventType.SegmentStart:
sweepline.Add(currentEvent.Segment);
int i = sweepline.IndexOf(currentEvent.Segment);
if (i > 0 && currentEvent.Segment.IntersectsWith(sweepline[0]))
{
return(true);
}
if (i < sweepline.Count - 1 && currentEvent.Segment.IntersectsWith(sweepline[i + 1]))
{
return(true);
}
break;
case EventType.SegmentEnd:
int j = sweepline.IndexOf(currentEvent.Segment);
if (j > 0 && j < sweepline.Count - 1 && sweepline[j - 1].IntersectsWith(sweepline[j + 1]))
{
return(true);
}
sweepline.Remove(currentEvent.Segment);
break;
}
}
return(false);
}