/// <summary>
///
/// </summary>
/// <param name="start"></param>
/// <returns></returns>
private EdgeString BuildEdgeStringStartingWith(LineMergeDirectedEdge start)
{
EdgeString edgeString = new EdgeString(factory);
LineMergeDirectedEdge current = start;
do
{
edgeString.Add(current);
current.Edge.Marked = true;
current = current.Next;
}while (current != null && current != start);
return(edgeString);
}
/// <summary>
///
/// </summary>
/// <param name="node"></param>
private void BuildEdgeStringsStartingAt(Node node)
{
IEnumerator i = node.OutEdges.GetEnumerator();
while (i.MoveNext())
{
LineMergeDirectedEdge directedEdge = (LineMergeDirectedEdge)i.Current;
if (directedEdge.Edge.IsMarked)
{
continue;
}
edgeStrings.Add(BuildEdgeStringStartingWith(directedEdge));
}
}
/// <summary>
/// Adds an Edge, DirectedEdges, and Nodes for the given LineString representation
/// of an edge.
/// </summary>
public virtual void AddEdge(LineString lineString)
{
if (lineString.IsEmpty)
{
return;
}
ICoordinate[] coordinates = CoordinateArrays.RemoveRepeatedPoints(lineString.Coordinates);
ICoordinate startCoordinate = coordinates[0];
ICoordinate endCoordinate = coordinates[coordinates.Length - 1];
Node startNode = GetNode(startCoordinate);
Node endNode = GetNode(endCoordinate);
DirectedEdge directedEdge0 = new LineMergeDirectedEdge(startNode, endNode,
coordinates[1], true);
DirectedEdge directedEdge1 = new LineMergeDirectedEdge(endNode, startNode,
coordinates[coordinates.Length - 2], false);
Edge edge = new LineMergeEdge(lineString);
edge.SetDirectedEdges(directedEdge0, directedEdge1);
Add(edge);
}
/// <summary>
/// Adds a directed edge which is known to form part of this line.
/// </summary>
/// <param name="directedEdge"></param>
public virtual void Add(LineMergeDirectedEdge directedEdge)
{
directedEdges.Add(directedEdge);
}
