} // public void CollectLineEdge( DirectedEdge de, int opCode, ArrayList edges )
/// <summary>
/// Collect edges from Area input which should be in the result by which have not been included
/// in a result area. This happens ONLY:
/// <ul>
/// <li>during an intersection when the boundaries of two areas touch in a line segment.
/// <li>OR as a result of a dimensional collapse.
/// </ul>
/// </summary>
/// <param name="de"></param>
/// <param name="opCode"></param>
/// <param name="edges"></param>
public void CollectBoundaryTouchEdge(DirectedEdge de, int opCode, ArrayList edges)
{
Label label = de.Label;
// this smells like a bit of a hack, but it seems to work...
if (!de.IsLineEdge &&
!de.IsInteriorAreaEdge && // added to handle dimensional collapses
!de.Edge.IsInResult &&
!de.Visited &&
OverlayOp.IsResultOfOp(label, opCode) &&
opCode == OverlayOp.Intersection)
{
edges.Add(de.Edge);
de.SetVisitedEdge(true);
}
} // public void CollectBoundaryTouchEdge( DirectedEdge de, int opCode, ArrayList edges )
} // private void CollectLines( int opCode )
/// <summary>
///
/// </summary>
/// <param name="de"></param>
/// <param name="opCode"></param>
/// <param name="edges"></param>
public void CollectLineEdge(DirectedEdge de, int opCode, ArrayList edges)
{
Label label = de.Label;
Edge e = de.Edge;
// include L edges which are in the result
if (de.IsLineEdge)
{
if (!de.Visited && OverlayOp.IsResultOfOp(label, opCode) && !e.IsCovered)
{
//Trace.WriteLine("de: " + de.Label.ToString() );
//Trace.WriteLine("edge: " + e.Label.ToString() );
edges.Add(e);
de.SetVisitedEdge(true);
} // if ( !de.Visited && OverlayOp.IsResultOfOp( label, opCode ) && !e.IsCovered )
} // if ( de.IsLineEdge )
} // public void CollectLineEdge( DirectedEdge de, int opCode, ArrayList edges )
} // public ArrayList Build( int opCode )
private ArrayList CollectNodes(int opCode)
{
ArrayList resultNodeList = new ArrayList();
// add nodes from edge intersections which have not already been included in the result
foreach (DictionaryEntry obj in _op.Graph.Nodes)
{
Node n = (Node)obj.Value;
if (!n.IsInResult)
{
Label label = n.Label;
if (OverlayOp.IsResultOfOp(label, opCode))
{
resultNodeList.Add(n);
}
} // if ( !n.IsInResult )
} // foreach ( object obj in _op.Graph.Nodes )
return(resultNodeList);
} // private ArrayList CollectNodes( int opCode )
