|
public Insert ( |
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| lb | ||
| newHalfedge | ||
| Результат | void | |
private void FortunesAlgorithm()
{
Site newSite, bottomSite, topSite, tempSite;
Vertex v, vertex;
PointF newintstar = PointF.Empty;
LR leftRight;
Halfedge lbnd, rbnd, llbnd, rrbnd, bisector;
Edge edge;
RectangleF dataBounds = _sites.GetSitesBounds();
int sqrt_nsites = (int)(Math.Sqrt(_sites.Length + 4));
HalfedgePriorityQueue heap = new HalfedgePriorityQueue(dataBounds.Y, dataBounds.Height, sqrt_nsites);
EdgeList edgeList = new EdgeList(dataBounds.X, dataBounds.Width, sqrt_nsites);
List <Halfedge> halfEdges = new List <Halfedge>();
List <Vertex> vertices = new List <Vertex>();
Site bottomMostSite = _sites.Next();
newSite = _sites.Next();
for (; ;)
{
if (heap.Empty() == false)
{
newintstar = heap.Min();
}
if (newSite != null &&
(heap.Empty() || CompareByYThenX(newSite, newintstar) < 0))
{
/* new site is smallest */
//trace("smallest: new site " + newSite);
// Step 8:
lbnd = edgeList.EdgeListLeftNeighbor(newSite.Coord()); // the Halfedge just to the left of newSite
//trace("lbnd: " + lbnd);
rbnd = lbnd.edgeListRightNeighbor; // the Halfedge just to the right
//trace("rbnd: " + rbnd);
bottomSite = RightRegion(lbnd, bottomMostSite); // this is the same as leftRegion(rbnd)
// this Site determines the region containing the new site
//trace("new Site is in region of existing site: " + bottomSite);
// Step 9:
edge = Edge.CreateBisectingEdge(bottomSite, newSite);
//trace("new edge: " + edge);
_edges.Add(edge);
bisector = Halfedge.Create(edge, LR.LEFT);
halfEdges.Add(bisector);
// inserting two Halfedges into edgeList static readonlyitutes Step 10:
// insert bisector to the right of lbnd:
edgeList.Insert(lbnd, bisector);
// first half of Step 11:
if ((vertex = Vertex.Intersect(lbnd, bisector)) != null)
{
vertices.Add(vertex);
heap.Remove(lbnd);
lbnd.vertex = vertex;
lbnd.ystar = vertex.Y + newSite.Dist(vertex);
heap.Insert(lbnd);
}
lbnd = bisector;
bisector = Halfedge.Create(edge, LR.RIGHT);
halfEdges.Add(bisector);
// second Halfedge for Step 10:
// insert bisector to the right of lbnd:
edgeList.Insert(lbnd, bisector);
// second half of Step 11:
if ((vertex = Vertex.Intersect(bisector, rbnd)) != null)
{
vertices.Add(vertex);
bisector.vertex = vertex;
bisector.ystar = vertex.Y + newSite.Dist(vertex);
heap.Insert(bisector);
}
newSite = _sites.Next();
}
else if (heap.Empty() == false)
{
/* intersection is smallest */
lbnd = heap.ExtractMin();
llbnd = lbnd.edgeListLeftNeighbor;
rbnd = lbnd.edgeListRightNeighbor;
rrbnd = rbnd.edgeListRightNeighbor;
bottomSite = LeftRegion(lbnd, bottomMostSite);
topSite = RightRegion(rbnd, bottomMostSite);
// these three sites define a Delaunay triangle
// (not actually using these for anything...)
//_triangles.Add(new Triangle(bottomSite, topSite, rightRegion(lbnd)));
v = lbnd.vertex;
v.SetIndex();
lbnd.edge.SetVertex(lbnd.leftRight, v);
rbnd.edge.SetVertex(rbnd.leftRight, v);
edgeList.Remove(lbnd);
heap.Remove(rbnd);
edgeList.Remove(rbnd);
leftRight = LR.LEFT;
if (bottomSite.Y > topSite.Y)
{
tempSite = bottomSite; bottomSite = topSite; topSite = tempSite; leftRight = LR.RIGHT;
}
edge = Edge.CreateBisectingEdge(bottomSite, topSite);
_edges.Add(edge);
bisector = Halfedge.Create(edge, leftRight);
halfEdges.Add(bisector);
edgeList.Insert(llbnd, bisector);
edge.SetVertex(LR.Other(leftRight), v);
if ((vertex = Vertex.Intersect(llbnd, bisector)) != null)
{
vertices.Add(vertex);
heap.Remove(llbnd);
llbnd.vertex = vertex;
llbnd.ystar = vertex.Y + bottomSite.Dist(vertex);
heap.Insert(llbnd);
}
if ((vertex = Vertex.Intersect(bisector, rrbnd)) != null)
{
vertices.Add(vertex);
bisector.vertex = vertex;
bisector.ystar = vertex.Y + bottomSite.Dist(vertex);
heap.Insert(bisector);
}
}
else
{
break;
}
}
// heap should be empty now
heap.Dispose();
edgeList.Dispose();
foreach (Halfedge halfEdge in halfEdges)
{
halfEdge.ReallyDispose();
}
halfEdges.Clear();
// we need the vertices to clip the edges
foreach (Edge edge2 in _edges)
{
edge2.ClipVertices(_plotBounds);
}
// but we don't actually ever use them again!
foreach (Vertex vertex2 in vertices)
{
vertex2.Dispose();
}
vertices.Clear();
}
private void FortunesAlgorithm ()
{
Site newSite, bottomSite, topSite, tempSite;
Vertex v, vertex;
Vector2 newintstar = Vector2.zero; //Because the compiler doesn't know that it will have a value - Julian
Side leftRight;
Halfedge lbnd, rbnd, llbnd, rrbnd, bisector;
Edge edge;
Rect dataBounds = _sites.GetSitesBounds ();
int sqrt_nsites = (int)(Mathf.Sqrt (_sites.Count + 4));
HalfedgePriorityQueue heap = new HalfedgePriorityQueue (dataBounds.y, dataBounds.height, sqrt_nsites);
EdgeList edgeList = new EdgeList (dataBounds.x, dataBounds.width, sqrt_nsites);
List<Halfedge> halfEdges = new List<Halfedge> ();
List<Vertex> vertices = new List<Vertex> ();
fortunesAlgorithm_bottomMostSite = _sites.Next ();
newSite = _sites.Next ();
for (;;) {
if (heap.Empty () == false) {
newintstar = heap.Min ();
}
if (newSite != null
&& (heap.Empty () || CompareByYThenX (newSite, newintstar) < 0)) {
/* new site is smallest */
//trace("smallest: new site " + newSite);
// Step 8:
lbnd = edgeList.EdgeListLeftNeighbor (newSite.Coord); // the Halfedge just to the left of newSite
//trace("lbnd: " + lbnd);
rbnd = lbnd.edgeListRightNeighbor; // the Halfedge just to the right
//trace("rbnd: " + rbnd);
bottomSite = FortunesAlgorithm_rightRegion (lbnd); // this is the same as leftRegion(rbnd)
// this Site determines the region containing the new site
//trace("new Site is in region of existing site: " + bottomSite);
// Step 9:
edge = Edge.CreateBisectingEdge (bottomSite, newSite);
//trace("new edge: " + edge);
_edges.Add (edge);
bisector = Halfedge.Create (edge, Side.LEFT);
halfEdges.Add (bisector);
// inserting two Halfedges into edgeList constitutes Step 10:
// insert bisector to the right of lbnd:
edgeList.Insert (lbnd, bisector);
// first half of Step 11:
if ((vertex = Vertex.Intersect (lbnd, bisector)) != null) {
vertices.Add (vertex);
heap.Remove (lbnd);
lbnd.vertex = vertex;
lbnd.ystar = vertex.y + newSite.Dist (vertex);
heap.Insert (lbnd);
}
lbnd = bisector;
bisector = Halfedge.Create (edge, Side.RIGHT);
halfEdges.Add (bisector);
// second Halfedge for Step 10:
// insert bisector to the right of lbnd:
edgeList.Insert (lbnd, bisector);
// second half of Step 11:
if ((vertex = Vertex.Intersect (bisector, rbnd)) != null) {
vertices.Add (vertex);
bisector.vertex = vertex;
bisector.ystar = vertex.y + newSite.Dist (vertex);
heap.Insert (bisector);
}
newSite = _sites.Next ();
} else if (heap.Empty () == false) {
/* intersection is smallest */
lbnd = heap.ExtractMin ();
llbnd = lbnd.edgeListLeftNeighbor;
rbnd = lbnd.edgeListRightNeighbor;
rrbnd = rbnd.edgeListRightNeighbor;
bottomSite = FortunesAlgorithm_leftRegion (lbnd);
topSite = FortunesAlgorithm_rightRegion (rbnd);
// these three sites define a Delaunay triangle
// (not actually using these for anything...)
//_triangles.push(new Triangle(bottomSite, topSite, rightRegion(lbnd)));
v = lbnd.vertex;
v.SetIndex ();
lbnd.edge.SetVertex ((Side)lbnd.leftRight, v);
rbnd.edge.SetVertex ((Side)rbnd.leftRight, v);
edgeList.Remove (lbnd);
heap.Remove (rbnd);
edgeList.Remove (rbnd);
leftRight = Side.LEFT;
if (bottomSite.y > topSite.y) {
tempSite = bottomSite;
bottomSite = topSite;
topSite = tempSite;
leftRight = Side.RIGHT;
}
edge = Edge.CreateBisectingEdge (bottomSite, topSite);
_edges.Add (edge);
bisector = Halfedge.Create (edge, leftRight);
halfEdges.Add (bisector);
edgeList.Insert (llbnd, bisector);
edge.SetVertex (SideHelper.Other (leftRight), v);
if ((vertex = Vertex.Intersect (llbnd, bisector)) != null) {
vertices.Add (vertex);
heap.Remove (llbnd);
llbnd.vertex = vertex;
llbnd.ystar = vertex.y + bottomSite.Dist (vertex);
heap.Insert (llbnd);
}
if ((vertex = Vertex.Intersect (bisector, rrbnd)) != null) {
vertices.Add (vertex);
bisector.vertex = vertex;
bisector.ystar = vertex.y + bottomSite.Dist (vertex);
heap.Insert (bisector);
}
} else {
break;
}
}
// heap should be empty now
heap.Dispose ();
edgeList.Dispose ();
for (int hIndex = 0; hIndex<halfEdges.Count; hIndex++) {
Halfedge halfEdge = halfEdges [hIndex];
halfEdge.ReallyDispose ();
}
halfEdges.Clear ();
// we need the vertices to clip the edges
for (int eIndex = 0; eIndex<_edges.Count; eIndex++) {
edge = _edges [eIndex];
edge.ClipVertices (_plotBounds);
}
// but we don't actually ever use them again!
for (int vIndex = 0; vIndex<vertices.Count; vIndex++) {
vertex = vertices [vIndex];
vertex.Dispose ();
}
vertices.Clear ();
}
private void FortunesAlgorithm()
{
Site newSite, bottomSite, topSite, tempSite;
Vertex v, vertex;
Vector2 newintstar = Vector2.zero; //Because the compiler doesn't know that it will have a value - Julian
Side leftRight;
Halfedge lbnd, rbnd, llbnd, rrbnd, bisector;
Edge edge;
Rect dataBounds = _sites.GetSitesBounds();
int sqrt_nsites = (int)(Mathf.Sqrt(_sites.Count + 4));
HalfedgePriorityQueue heap = new HalfedgePriorityQueue(dataBounds.y, dataBounds.height, sqrt_nsites);
EdgeList edgeList = new EdgeList(dataBounds.x, dataBounds.width, sqrt_nsites);
List <Halfedge> halfEdges = new List <Halfedge> ();
List <Vertex> vertices = new List <Vertex> ();
fortunesAlgorithm_bottomMostSite = _sites.Next();
newSite = _sites.Next();
for (;;)
{
if (heap.Empty() == false)
{
newintstar = heap.Min();
}
if (newSite != null &&
(heap.Empty() || CompareByYThenX(newSite, newintstar) < 0))
{
/* new site is smallest */
//trace("smallest: new site " + newSite);
// Step 8:
lbnd = edgeList.EdgeListLeftNeighbor(newSite.Coord); // the Halfedge just to the left of newSite
//trace("lbnd: " + lbnd);
rbnd = lbnd.edgeListRightNeighbor; // the Halfedge just to the right
//trace("rbnd: " + rbnd);
bottomSite = FortunesAlgorithm_rightRegion(lbnd); // this is the same as leftRegion(rbnd)
// this Site determines the region containing the new site
//trace("new Site is in region of existing site: " + bottomSite);
// Step 9:
edge = Edge.CreateBisectingEdge(bottomSite, newSite);
//trace("new edge: " + edge);
_edges.Add(edge);
bisector = Halfedge.Create(edge, Side.LEFT);
halfEdges.Add(bisector);
// inserting two Halfedges into edgeList constitutes Step 10:
// insert bisector to the right of lbnd:
edgeList.Insert(lbnd, bisector);
// first half of Step 11:
if ((vertex = Vertex.Intersect(lbnd, bisector)) != null)
{
vertices.Add(vertex);
heap.Remove(lbnd);
lbnd.vertex = vertex;
lbnd.ystar = vertex.y + newSite.Dist(vertex);
heap.Insert(lbnd);
}
lbnd = bisector;
bisector = Halfedge.Create(edge, Side.RIGHT);
halfEdges.Add(bisector);
// second Halfedge for Step 10:
// insert bisector to the right of lbnd:
edgeList.Insert(lbnd, bisector);
// second half of Step 11:
if ((vertex = Vertex.Intersect(bisector, rbnd)) != null)
{
vertices.Add(vertex);
bisector.vertex = vertex;
bisector.ystar = vertex.y + newSite.Dist(vertex);
heap.Insert(bisector);
}
newSite = _sites.Next();
}
else if (heap.Empty() == false)
{
/* intersection is smallest */
lbnd = heap.ExtractMin();
llbnd = lbnd.edgeListLeftNeighbor;
rbnd = lbnd.edgeListRightNeighbor;
rrbnd = rbnd.edgeListRightNeighbor;
bottomSite = FortunesAlgorithm_leftRegion(lbnd);
topSite = FortunesAlgorithm_rightRegion(rbnd);
// these three sites define a Delaunay triangle
// (not actually using these for anything...)
// ******ADDED******
_triangles.Add(new Triangle(bottomSite, topSite, FortunesAlgorithm_rightRegion(lbnd)));
v = lbnd.vertex;
v.SetIndex();
lbnd.edge.SetVertex((Side)lbnd.leftRight, v);
rbnd.edge.SetVertex((Side)rbnd.leftRight, v);
edgeList.Remove(lbnd);
heap.Remove(rbnd);
edgeList.Remove(rbnd);
leftRight = Side.LEFT;
if (bottomSite.y > topSite.y)
{
tempSite = bottomSite;
bottomSite = topSite;
topSite = tempSite;
leftRight = Side.RIGHT;
}
edge = Edge.CreateBisectingEdge(bottomSite, topSite);
_edges.Add(edge);
bisector = Halfedge.Create(edge, leftRight);
halfEdges.Add(bisector);
edgeList.Insert(llbnd, bisector);
edge.SetVertex(SideHelper.Other(leftRight), v);
if ((vertex = Vertex.Intersect(llbnd, bisector)) != null)
{
vertices.Add(vertex);
heap.Remove(llbnd);
llbnd.vertex = vertex;
llbnd.ystar = vertex.y + bottomSite.Dist(vertex);
heap.Insert(llbnd);
}
if ((vertex = Vertex.Intersect(bisector, rrbnd)) != null)
{
vertices.Add(vertex);
bisector.vertex = vertex;
bisector.ystar = vertex.y + bottomSite.Dist(vertex);
heap.Insert(bisector);
}
}
else
{
break;
}
}
// heap should be empty now
heap.Dispose();
edgeList.Dispose();
for (int hIndex = 0; hIndex < halfEdges.Count; hIndex++)
{
Halfedge halfEdge = halfEdges [hIndex];
halfEdge.ReallyDispose();
}
halfEdges.Clear();
// we need the vertices to clip the edges
for (int eIndex = 0; eIndex < _edges.Count; eIndex++)
{
edge = _edges [eIndex];
edge.ClipVertices(_plotBounds);
}
// but we don't actually ever use them again!
for (int vIndex = 0; vIndex < vertices.Count; vIndex++)
{
vertex = vertices [vIndex];
vertex.Dispose();
}
vertices.Clear();
}
private void FortunesAlgorithm()
{
Site newSite, bottomSite, topSite, tempSite;
Vertex v, vertex;
Vector2f newIntStar = Vector2f.zero;
LR leftRight;
Halfedge lbnd, rbnd, llbnd, rrbnd, bisector;
Edge edge;
Rectf dataBounds = sites.GetSitesBounds();
int sqrtSitesNb = (int)Math.Sqrt(sites.Count() + 4);
HalfedgePriorityQueue heap = new HalfedgePriorityQueue(dataBounds.y, dataBounds.height, sqrtSitesNb);
EdgeList edgeList = new EdgeList(dataBounds.x, dataBounds.width, sqrtSitesNb);
List <Halfedge> halfEdges = new List <Halfedge>();
List <Vertex> vertices = new List <Vertex>();
Site bottomMostSite = sites.Next();
newSite = sites.Next();
while (true)
{
if (!heap.Empty())
{
newIntStar = heap.Min();
}
if (newSite != null &&
(heap.Empty() || CompareByYThenX(newSite, newIntStar) < 0))
{
// New site is smallest
//Debug.Log("smallest: new site " + newSite);
// Step 8:
lbnd = edgeList.EdgeListLeftNeighbor(newSite.Coord); // The halfedge just to the left of newSite
//UnityEngine.Debug.Log("lbnd: " + lbnd);
rbnd = lbnd.edgeListRightNeighbor; // The halfedge just to the right
//UnityEngine.Debug.Log("rbnd: " + rbnd);
bottomSite = RightRegion(lbnd, bottomMostSite); // This is the same as leftRegion(rbnd)
// This Site determines the region containing the new site
//UnityEngine.Debug.Log("new Site is in region of existing site: " + bottomSite);
// Step 9
edge = Edge.CreateBisectingEdge(bottomSite, newSite);
//UnityEngine.Debug.Log("new edge: " + edge);
edges.Add(edge);
bisector = Halfedge.Create(edge, LR.LEFT);
halfEdges.Add(bisector);
// Inserting two halfedges into edgelist constitutes Step 10:
// Insert bisector to the right of lbnd:
edgeList.Insert(lbnd, bisector);
// First half of Step 11:
if ((vertex = Vertex.Intersect(lbnd, bisector)) != null)
{
vertices.Add(vertex);
heap.Remove(lbnd);
lbnd.vertex = vertex;
lbnd.ystar = vertex.y + newSite.Dist(vertex);
heap.Insert(lbnd);
}
lbnd = bisector;
bisector = Halfedge.Create(edge, LR.RIGHT);
halfEdges.Add(bisector);
// Second halfedge for Step 10::
// Insert bisector to the right of lbnd:
edgeList.Insert(lbnd, bisector);
// Second half of Step 11:
if ((vertex = Vertex.Intersect(bisector, rbnd)) != null)
{
vertices.Add(vertex);
bisector.vertex = vertex;
bisector.ystar = vertex.y + newSite.Dist(vertex);
heap.Insert(bisector);
}
newSite = sites.Next();
}
else if (!heap.Empty())
{
// Intersection is smallest
lbnd = heap.ExtractMin();
llbnd = lbnd.edgeListLeftNeighbor;
rbnd = lbnd.edgeListRightNeighbor;
rrbnd = rbnd.edgeListRightNeighbor;
bottomSite = LeftRegion(lbnd, bottomMostSite);
topSite = RightRegion(rbnd, bottomMostSite);
// These three sites define a Delaunay triangle
// (not actually using these for anything...)
// triangles.Add(new Triangle(bottomSite, topSite, RightRegion(lbnd, bottomMostSite)));
v = lbnd.vertex;
v.SetIndex();
lbnd.edge.SetVertex(lbnd.leftRight, v);
rbnd.edge.SetVertex(rbnd.leftRight, v);
edgeList.Remove(lbnd);
heap.Remove(rbnd);
edgeList.Remove(rbnd);
leftRight = LR.LEFT;
if (bottomSite.y > topSite.y)
{
tempSite = bottomSite;
bottomSite = topSite;
topSite = tempSite;
leftRight = LR.RIGHT;
}
edge = Edge.CreateBisectingEdge(bottomSite, topSite);
edges.Add(edge);
bisector = Halfedge.Create(edge, leftRight);
halfEdges.Add(bisector);
edgeList.Insert(llbnd, bisector);
edge.SetVertex(LR.Other(leftRight), v);
if ((vertex = Vertex.Intersect(llbnd, bisector)) != null)
{
vertices.Add(vertex);
heap.Remove(llbnd);
llbnd.vertex = vertex;
llbnd.ystar = vertex.y + bottomSite.Dist(vertex);
heap.Insert(llbnd);
}
if ((vertex = Vertex.Intersect(bisector, rrbnd)) != null)
{
vertices.Add(vertex);
bisector.vertex = vertex;
bisector.ystar = vertex.y + bottomSite.Dist(vertex);
heap.Insert(bisector);
}
}
else
{
break;
}
}
// Heap should be empty now
heap.Dispose();
edgeList.Dispose();
foreach (Halfedge halfedge in halfEdges)
{
halfedge.ReallyDispose();
}
halfEdges.Clear();
// we need the vertices to clip the edges
foreach (Edge e in edges)
{
e.ClipVertices(plotBounds);
}
// But we don't actually ever use them again!
foreach (Vertex ve in vertices)
{
ve.Dispose();
}
vertices.Clear();
}
private void FortunesAlgorithm()
{
Vector2 s = Vector2.zero;
Rect sitesBounds = _sites.GetSitesBounds();
int sqrt_nsites = (int)Mathf.Sqrt(_sites.Count + 4);
HalfedgePriorityQueue halfedgePriorityQueue = new HalfedgePriorityQueue(sitesBounds.y, sitesBounds.height, sqrt_nsites);
EdgeList edgeList = new EdgeList(sitesBounds.x, sitesBounds.width, sqrt_nsites);
List <Halfedge> list = new List <Halfedge>();
List <Vertex> list2 = new List <Vertex>();
fortunesAlgorithm_bottomMostSite = _sites.Next();
Site site = _sites.Next();
while (true)
{
if (!halfedgePriorityQueue.Empty())
{
s = halfedgePriorityQueue.Min();
}
if (site != null && (halfedgePriorityQueue.Empty() || CompareByYThenX(site, s) < 0))
{
Halfedge halfedge = edgeList.EdgeListLeftNeighbor(site.Coord);
Halfedge edgeListRightNeighbor = halfedge.edgeListRightNeighbor;
Site site2 = FortunesAlgorithm_rightRegion(halfedge);
Edge edge = Edge.CreateBisectingEdge(site2, site);
_edges.Add(edge);
Halfedge halfedge2 = Halfedge.Create(edge, Side.LEFT);
list.Add(halfedge2);
edgeList.Insert(halfedge, halfedge2);
Vertex vertex;
if ((vertex = Vertex.Intersect(halfedge, halfedge2)) != null)
{
list2.Add(vertex);
halfedgePriorityQueue.Remove(halfedge);
halfedge.vertex = vertex;
halfedge.ystar = vertex.y + site.Dist(vertex);
halfedgePriorityQueue.Insert(halfedge);
}
halfedge = halfedge2;
halfedge2 = Halfedge.Create(edge, Side.RIGHT);
list.Add(halfedge2);
edgeList.Insert(halfedge, halfedge2);
if ((vertex = Vertex.Intersect(halfedge2, edgeListRightNeighbor)) != null)
{
list2.Add(vertex);
halfedge2.vertex = vertex;
halfedge2.ystar = vertex.y + site.Dist(vertex);
halfedgePriorityQueue.Insert(halfedge2);
}
site = _sites.Next();
continue;
}
if (!halfedgePriorityQueue.Empty())
{
Halfedge halfedge = halfedgePriorityQueue.ExtractMin();
Halfedge edgeListLeftNeighbor = halfedge.edgeListLeftNeighbor;
Halfedge edgeListRightNeighbor = halfedge.edgeListRightNeighbor;
Halfedge edgeListRightNeighbor2 = edgeListRightNeighbor.edgeListRightNeighbor;
Site site2 = FortunesAlgorithm_leftRegion(halfedge);
Site site3 = FortunesAlgorithm_rightRegion(edgeListRightNeighbor);
_triangles.Add(new Triangle(site2, site3, FortunesAlgorithm_rightRegion(halfedge)));
Vertex vertex2 = halfedge.vertex;
vertex2.SetIndex();
Edge edge2 = halfedge.edge;
Side?leftRight = halfedge.leftRight;
edge2.SetVertex(leftRight.Value, vertex2);
Edge edge3 = edgeListRightNeighbor.edge;
Side?leftRight2 = edgeListRightNeighbor.leftRight;
edge3.SetVertex(leftRight2.Value, vertex2);
edgeList.Remove(halfedge);
halfedgePriorityQueue.Remove(edgeListRightNeighbor);
edgeList.Remove(edgeListRightNeighbor);
Side side = Side.LEFT;
if (site2.y > site3.y)
{
Site site4 = site2;
site2 = site3;
site3 = site4;
side = Side.RIGHT;
}
Edge edge = Edge.CreateBisectingEdge(site2, site3);
_edges.Add(edge);
Halfedge halfedge2 = Halfedge.Create(edge, side);
list.Add(halfedge2);
edgeList.Insert(edgeListLeftNeighbor, halfedge2);
edge.SetVertex(SideHelper.Other(side), vertex2);
Vertex vertex;
if ((vertex = Vertex.Intersect(edgeListLeftNeighbor, halfedge2)) != null)
{
list2.Add(vertex);
halfedgePriorityQueue.Remove(edgeListLeftNeighbor);
edgeListLeftNeighbor.vertex = vertex;
edgeListLeftNeighbor.ystar = vertex.y + site2.Dist(vertex);
halfedgePriorityQueue.Insert(edgeListLeftNeighbor);
}
if ((vertex = Vertex.Intersect(halfedge2, edgeListRightNeighbor2)) != null)
{
list2.Add(vertex);
halfedge2.vertex = vertex;
halfedge2.ystar = vertex.y + site2.Dist(vertex);
halfedgePriorityQueue.Insert(halfedge2);
}
continue;
}
break;
}
halfedgePriorityQueue.Dispose();
edgeList.Dispose();
for (int i = 0; i < list.Count; i++)
{
Halfedge halfedge3 = list[i];
halfedge3.ReallyDispose();
}
list.Clear();
for (int j = 0; j < _edges.Count; j++)
{
Edge edge = _edges[j];
edge.ClipVertices(_plotBounds);
}
for (int k = 0; k < list2.Count; k++)
{
Vertex vertex = list2[k];
vertex.Dispose();
}
list2.Clear();
}
private void FortunesAlgorithm()
{
Site newSite, bottomSite, topSite, tempSite;
Vertex v, vertex;
PointF newintstar = PointF.Empty;
LR leftRight;
Halfedge lbnd, rbnd, llbnd, rrbnd, bisector;
Edge edge;
RectangleF dataBounds = _sites.GetSitesBounds();
int sqrt_nsites = (int)(Math.Sqrt(_sites.Length + 4));
HalfedgePriorityQueue heap = new HalfedgePriorityQueue(dataBounds.Y, dataBounds.Height, sqrt_nsites);
EdgeList edgeList = new EdgeList(dataBounds.X, dataBounds.Width, sqrt_nsites);
List<Halfedge> halfEdges = new List<Halfedge>();
List<Vertex> vertices = new List<Vertex>();
Site bottomMostSite = _sites.Next();
newSite = _sites.Next();
for (; ; )
{
if (heap.Empty() == false)
{
newintstar = heap.Min();
}
if (newSite != null
&& (heap.Empty() || CompareByYThenX(newSite, newintstar) < 0))
{
/* new site is smallest */
//trace("smallest: new site " + newSite);
// Step 8:
lbnd = edgeList.EdgeListLeftNeighbor(newSite.Coord()); // the Halfedge just to the left of newSite
//trace("lbnd: " + lbnd);
rbnd = lbnd.edgeListRightNeighbor; // the Halfedge just to the right
//trace("rbnd: " + rbnd);
bottomSite = RightRegion(lbnd, bottomMostSite); // this is the same as leftRegion(rbnd)
// this Site determines the region containing the new site
//trace("new Site is in region of existing site: " + bottomSite);
// Step 9:
edge = Edge.CreateBisectingEdge(bottomSite, newSite);
//trace("new edge: " + edge);
_edges.Add(edge);
bisector = Halfedge.Create(edge, LR.LEFT);
halfEdges.Add(bisector);
// inserting two Halfedges into edgeList static readonlyitutes Step 10:
// insert bisector to the right of lbnd:
edgeList.Insert(lbnd, bisector);
// first half of Step 11:
if ((vertex = Vertex.Intersect(lbnd, bisector)) != null)
{
vertices.Add(vertex);
heap.Remove(lbnd);
lbnd.vertex = vertex;
lbnd.ystar = vertex.Y + newSite.Dist(vertex);
heap.Insert(lbnd);
}
lbnd = bisector;
bisector = Halfedge.Create(edge, LR.RIGHT);
halfEdges.Add(bisector);
// second Halfedge for Step 10:
// insert bisector to the right of lbnd:
edgeList.Insert(lbnd, bisector);
// second half of Step 11:
if ((vertex = Vertex.Intersect(bisector, rbnd)) != null)
{
vertices.Add(vertex);
bisector.vertex = vertex;
bisector.ystar = vertex.Y + newSite.Dist(vertex);
heap.Insert(bisector);
}
newSite = _sites.Next();
}
else if (heap.Empty() == false)
{
/* intersection is smallest */
lbnd = heap.ExtractMin();
llbnd = lbnd.edgeListLeftNeighbor;
rbnd = lbnd.edgeListRightNeighbor;
rrbnd = rbnd.edgeListRightNeighbor;
bottomSite = LeftRegion(lbnd, bottomMostSite);
topSite = RightRegion(rbnd, bottomMostSite);
// these three sites define a Delaunay triangle
// (not actually using these for anything...)
//_triangles.Add(new Triangle(bottomSite, topSite, rightRegion(lbnd)));
v = lbnd.vertex;
v.SetIndex();
lbnd.edge.SetVertex(lbnd.leftRight, v);
rbnd.edge.SetVertex(rbnd.leftRight, v);
edgeList.Remove(lbnd);
heap.Remove(rbnd);
edgeList.Remove(rbnd);
leftRight = LR.LEFT;
if (bottomSite.Y > topSite.Y)
{
tempSite = bottomSite; bottomSite = topSite; topSite = tempSite; leftRight = LR.RIGHT;
}
edge = Edge.CreateBisectingEdge(bottomSite, topSite);
_edges.Add(edge);
bisector = Halfedge.Create(edge, leftRight);
halfEdges.Add(bisector);
edgeList.Insert(llbnd, bisector);
edge.SetVertex(LR.Other(leftRight), v);
if ((vertex = Vertex.Intersect(llbnd, bisector)) != null)
{
vertices.Add(vertex);
heap.Remove(llbnd);
llbnd.vertex = vertex;
llbnd.ystar = vertex.Y + bottomSite.Dist(vertex);
heap.Insert(llbnd);
}
if ((vertex = Vertex.Intersect(bisector, rrbnd)) != null)
{
vertices.Add(vertex);
bisector.vertex = vertex;
bisector.ystar = vertex.Y + bottomSite.Dist(vertex);
heap.Insert(bisector);
}
}
else
{
break;
}
}
// heap should be empty now
heap.Dispose();
edgeList.Dispose();
foreach (Halfedge halfEdge in halfEdges)
{
halfEdge.ReallyDispose();
}
halfEdges.Clear();
// we need the vertices to clip the edges
foreach (Edge edge2 in _edges)
{
edge2.ClipVertices(_plotBounds);
}
// but we don't actually ever use them again!
foreach (Vertex vertex2 in vertices)
{
vertex2.Dispose();
}
vertices.Clear();
}