/// <summary>
/// Gets an edge from the given graph taking into account 'can have duplicates'.
/// </summary>
/// <param name="graph"></param>
/// <param name="from"></param>
/// <param name="to"></param>
/// <param name="existingData"></param>
/// <param name="shape"></param>
/// <returns></returns>
private bool GetEdge(GraphBase <TEdgeData> graph, uint from, uint to, out TEdgeData existingData, out ICoordinateCollection shape)
{
if (!graph.CanHaveDuplicates)
{
graph.GetEdgeShape(from, to, out shape);
return(graph.GetEdge(from, to, out existingData));
}
else
{
var edges = graph.GetEdges(from, to);
while (edges.MoveNext())
{
if (edges.Neighbour == to)
{
existingData = edges.EdgeData;
shape = edges.Intermediates;
return(true);
}
}
existingData = default(TEdgeData);
shape = null;
return(false);
}
}
