/// <summary>
/// Given an edge, determine the edge directly to the left of it on the sweep line
/// </summary>
/// <param name="edge">An edge - not necessarily in the sweepline)</param>
/// <returns>If it exists, the edge directly to the left on the sweepline, or null if there is none</returns>
private KeyValuePair <EdgeBase, TVertex>?DirectlyLeftOf(EdgeBase edge)
{
KeyValuePair <EdgeBase, TVertex> result;
bool found = helpers.TryGetLargestBelow(edge, out result);
if (found)
{
return(result);
}
return(null);
}
private KeyValuePair <TVertex, TVertex>?DirectlyLeftOf(TVertex vertex)
{
KeyValuePair <TVertex, TVertex> result;
bool found = helpers.TryGetLargestBelow(vertex, out result);
if (found)
{
return(result);
}
return(null);
}
