public static ReductionResult RunTest(Graph graph, int upperBound)
{
var graphContracted = graph.Clone();
int reductionBound = int.MaxValue;
// 1. Contract edges in MST that are in same Voronoi region
var degreeTwo = graphContracted.Vertices.Where(x => graphContracted.GetDegree(x) == 2).ToList(); // Vertices which could be removed by contracting their adjacent edges
foreach (var vertex in degreeTwo)
{
var voronoi = graph.GetVoronoiRegionForVertex(vertex);
var edge1 = graphContracted.GetEdgesForVertex(vertex)[0];
var edge2 = graphContracted.GetEdgesForVertex(vertex)[1];
var vertex1 = edge1.Other(vertex);
var vertex2 = edge2.Other(vertex);
if (graph.GetVoronoiRegionForVertex(vertex1) == voronoi &&
graph.GetVoronoiRegionForVertex(vertex2) == voronoi)
{
// Contract the two edges.
graphContracted.AddEdge(vertex1, vertex2, edge1.Cost + edge2.Cost);
graphContracted.RemoveEdge(edge1);
graphContracted.RemoveEdge(edge2);
}
}
var G = new Graph(graph.Terminals);
var result = new ReductionResult();
result.ReductionUpperBound = reductionBound;
return result;
}
