/// <summary>
/// Adds an intersection into the list, if it isn't already there.
/// The input segmentIndex and dist are expected to be normalized.
/// </summary>
/// <param name="intPt"></param>
/// <param name="segmentIndex"></param>
/// <returns>The SegmentIntersection found or added.</returns>
public SegmentNode Add(ICoordinate intPt, int segmentIndex)
{
SegmentNode eiNew = new SegmentNode(edge, intPt, segmentIndex, edge.GetSegmentOctant(segmentIndex));
SegmentNode ei = (SegmentNode)nodeMap[eiNew];
if (ei != null)
{
// debugging sanity check
Assert.IsTrue(ei.Coordinate.Equals2D(intPt), "Found equal nodes with different coordinates");
return(ei);
}
// node does not exist, so create it
nodeMap.Add(eiNew, eiNew);
return(eiNew);
}
