/// <summary>
/// Constructs a new edge using the coordinates collection and supplied label object.
/// </summary>
/// <param name="pts"></param>
/// <param name="label"></param>
public Edge(Coordinates pts, Label label)
{
_eiList = new EdgeIntersectionList( this );
_pts = pts;
_label = label; // inherited member variable.
}
private int _depthDelta = 0; // the change in area depth from the R to L side of this edge
#region Constructors
/// <summary>
/// Constructs a new edge using the coordinates collection and supplied label object.
/// </summary>
/// <param name="pts"></param>
/// <param name="label"></param>
public Edge(Coordinates pts, Label label)
{
_eiList = new EdgeIntersectionList(this);
_pts = pts;
_label = label; // inherited member variable.
}
/// <summary>
/// Check that a ring does not self-intersect, except at its endpoints.
/// Algorithm is to count the number of times each node along edge occurs.
/// If any occur more than once, that must be a self-intersection.
/// </summary>
/// <param name="eiList"></param>
private void CheckSelfIntersectingRing(EdgeIntersectionList eiList)
{
//Set nodeSet = new TreeSet(); awc don't need sorted list, just a hashtable
Hashtable nodeSet = new Hashtable();
bool isFirst = true;
//for (Iterator i = eiList.iterator(); i.hasNext(); )
foreach(EdgeIntersection ei in eiList)
{
//EdgeIntersection ei = (EdgeIntersection) i.next();
if (isFirst)
{
isFirst = false;
continue;
}
if (nodeSet.Contains(ei.Coordinate))
{
_validErr = new TopologyValidationError(
TopologyValidationError.RingSelfIntersection,
ei.Coordinate);
return;
}
else
{
//TODO: awc - should probably use hashcode
nodeSet.Add(ei.Coordinate, ei.Coordinate);
}
}
}