/// <summary>
/// This method is called by clients
/// of the <see cref="ISegmentIntersector" /> class to process
/// intersections for two segments of the <see cref="ISegmentString" />s being intersected.<br/>
/// Note that some clients (such as <c>MonotoneChain</c>s) may optimize away
/// this call for segment pairs which they have determined do not intersect
/// (e.g. by an disjoint envelope test).
/// </summary>
/// <param name="e0"></param>
/// <param name="segIndex0"></param>
/// <param name="e1"></param>
/// <param name="segIndex1"></param>
public void ProcessIntersections(ISegmentString e0, int segIndex0, ISegmentString e1, int segIndex1)
{
// don't bother intersecting a segment with itself
if (e0 == e1 && segIndex0 == segIndex1)
{
return;
}
Coordinate[] coordinates0 = e0.Coordinates;
Coordinate p00 = coordinates0[segIndex0];
Coordinate p01 = coordinates0[segIndex0 + 1];
Coordinate[] coordinates1 = e1.Coordinates;
Coordinate p10 = coordinates1[segIndex1];
Coordinate p11 = coordinates1[segIndex1 + 1];
_li.ComputeIntersection(p00, p01, p10, p11);
if (!_li.HasIntersection)
{
return;
}
if (!_li.IsInteriorIntersection())
{
return;
}
for (int intIndex = 0; intIndex < _li.IntersectionNum; intIndex++)
{
_interiorIntersections.Add(_li.GetIntersection(intIndex));
}
NodedSegmentString nss0 = (NodedSegmentString)e0;
nss0.AddIntersections(_li, segIndex0, 0);
NodedSegmentString nss1 = (NodedSegmentString)e1;
nss1.AddIntersections(_li, segIndex1, 1);
}
private readonly NodedSegmentString _edge; // the parent edge
/// <summary>
/// Initializes a new instance of the <see cref="SegmentNodeList"/> class.
/// </summary>
/// <param name="edge">The edge.</param>
public SegmentNodeList(NodedSegmentString edge)
{
_edge = edge;
}
/// <summary>
/// Returns a <see cref="IList{ISegmentString}"/> of fully noded <see cref="ISegmentString"/>s.
/// The <see cref="ISegmentString"/>s have the same context as their parent.
/// </summary>
/// <returns></returns>
public override IList <ISegmentString> GetNodedSubstrings()
{
return(NodedSegmentString.GetNodedSubstrings(_nodedSegStrings));
}