private void Fortunes()
{
Site nSite;
Site bottomSite;
Site topSite;
Site tSite;
Vertex v1;
Vertex v2;
Point newIntStar = null;
Orientation lr;
HalfEdge lBnd;
HalfEdge rBnd;
HalfEdge llBnd;
HalfEdge rrBnd;
HalfEdge bisector;
Edge e;
Rectangle dataBounds = sites.GetSitesBounds();
int sqrtNSites = (int)Math.Sqrt(sites.GetLength() + 4);
HalfEdgePriorityQueue heap = new HalfEdgePriorityQueue(dataBounds.y, dataBounds.height, sqrtNSites);
EdgeList edgeList = new EdgeList(dataBounds.x, dataBounds.width, sqrtNSites);
List <HalfEdge> halfEdges = new List <HalfEdge>();
List <Vertex> vertices = new List <Vertex>();
Site lowestSite = this.sites.Next();
nSite = sites.Next();
for (;;)
{
if (heap.Empty() == false)
{
newIntStar = heap.Min();
}
if (nSite != null && (heap.Empty() || CompareByYThenX(nSite, newIntStar) < 0))
{
lBnd = edgeList.EdgeListLeftNeighbor(nSite.coord);
rBnd = lBnd.edgeListRightNeighbor;
bottomSite = RightRegion(lBnd, lowestSite);
e = Edge.CreateBisectingEdge(bottomSite, nSite);
this.edges.Add(e);
bisector = HalfEdge.Create(e, Orientation.LEFT);
halfEdges.Add(bisector);
//Console.WriteLine(lBnd.edgeListLeftNeighbor);
//Console.WriteLine(lBnd.edgeListRightNeighbor);
edgeList.Insert(lBnd, bisector);
if ((v2 = Vertex.Intersect(lBnd, bisector)) != null)
{
vertices.Add(v2);
heap.Remove(lBnd);
lBnd.v = v2;
lBnd.yStar = v2.GetCoord().y + nSite.Dist(v2);
heap.Insert(lBnd);
}
lBnd = bisector;
bisector = HalfEdge.Create(e, Orientation.RIGHT);
halfEdges.Add(bisector);
edgeList.Insert(lBnd, bisector);
if ((v2 = Vertex.Intersect(bisector, rBnd)) != null)
{
vertices.Add(v2);
bisector.v = v2;
bisector.yStar = v2.GetCoord().y + nSite.Dist(v2);
heap.Insert(bisector);
}
nSite = this.sites.Next();
}
else if (heap.Empty() == false)
{
lBnd = heap.ExtractMin();
llBnd = lBnd.edgeListLeftNeighbor;
rBnd = lBnd.edgeListRightNeighbor;
rrBnd = rBnd.edgeListRightNeighbor;
bottomSite = LeftRegion(lBnd, lowestSite);
topSite = RightRegion(rBnd, lowestSite);
v1 = lBnd.v;
v1.SetIndex();
lBnd.e.SetVertex(lBnd.orientation, v1);
rBnd.e.SetVertex(rBnd.orientation, v1);
edgeList.Remove(lBnd);
heap.Remove(rBnd);
edgeList.Remove(rBnd);
lr = Orientation.LEFT;
if (bottomSite.coord.y > topSite.coord.y)
{
tSite = bottomSite;
bottomSite = topSite;
topSite = tSite;
lr = Orientation.RIGHT;
}
e = Edge.CreateBisectingEdge(bottomSite, topSite);
this.edges.Add(e);
bisector = HalfEdge.Create(e, lr);
halfEdges.Add(bisector);
edgeList.Insert(llBnd, bisector);
e.SetVertex(Orientation.Other(lr), v1);
if ((v2 = Vertex.Intersect(llBnd, bisector)) != null)
{
vertices.Add(v2);
heap.Remove(llBnd);
llBnd.v = v2;
llBnd.yStar = v2.GetCoord().y + bottomSite.Dist(v2);
heap.Insert(llBnd);
}
if ((v2 = Vertex.Intersect(bisector, rrBnd)) != null)
{
vertices.Add(v2);
bisector.v = v2;
bisector.yStar = v2.GetCoord().y + bottomSite.Dist(v2);
heap.Insert(bisector);
}
}
else
{
break;
}
}
heap.Dispose();
edgeList.Dispose();
foreach (HalfEdge hE in halfEdges)
{
hE.Kill();
}
halfEdges.Clear();
foreach (Edge tE in this.edges)
{
tE.ClipVertices(bounds);
}
foreach (Vertex v0 in vertices)
{
v0.Dispose();
}
vertices.Clear();
}