/// <summary>
/// Add an <see cref="SegmentNode" /> for intersection intIndex.
/// An intersection that falls exactly on a vertex
/// of the <see cref="SegmentString" /> is normalized
/// to use the higher of the two possible segmentIndexes.
/// </summary>
/// <param name="li"></param>
/// <param name="segmentIndex"></param>
/// <param name="intIndex"></param>
public void AddIntersection(LineIntersector li, int segmentIndex, int intIndex)
{
Coordinate intPt = new Coordinate(li.GetIntersection(intIndex));
AddIntersection(intPt, segmentIndex);
}
/// <summary>
/// Add an EdgeIntersection for intersection intIndex.
/// An intersection that falls exactly on a vertex of the edge is normalized
/// to use the higher of the two possible segmentIndexes.
/// </summary>
/// <param name="li"></param>
/// <param name="segmentIndex"></param>
/// <param name="geomIndex"></param>
/// <param name="intIndex"></param>
public virtual void AddIntersection(LineIntersector li, int segmentIndex, int geomIndex, int intIndex)
{
Coordinate intPt = new Coordinate(li.GetIntersection(intIndex));
int normalizedSegmentIndex = segmentIndex;
double dist = li.GetEdgeDistance(geomIndex, intIndex);
// normalize the intersection point location
int nextSegIndex = normalizedSegmentIndex + 1;
if (nextSegIndex < Points.Count)
{
Coordinate nextPt = Points[nextSegIndex];
// Normalize segment index if intPt falls on vertex
// The check for point equality is 2D only - Z values are ignored
if (intPt.Equals2D(nextPt))
{
normalizedSegmentIndex = nextSegIndex;
dist = 0.0;
}
// Add the intersection point to edge intersection list.
EdgeIntersectionList.Add(intPt, normalizedSegmentIndex, dist);
}
}
/// <summary>
///
/// </summary>
/// <param name="li"></param>
/// <param name="p0"></param>
/// <param name="p1"></param>
/// <returns><c>true</c> if there is an intersection point which is not an endpoint of the segment p0-p1.</returns>
private static bool HasInteriorIntersection(LineIntersector li, Coordinate p0, Coordinate p1)
{
for (int i = 0; i < li.IntersectionNum; i++)
{
Coordinate intPt = li.GetIntersection(i);
if (!(intPt.Equals(p0) || intPt.Equals(p1)))
return true;
}
return false;
}