/// <summary>
/// Quads the contains any point in cell.
/// No Matter how small the piece, even if it's only one VoronoiEdge point
/// We need to know if the polygon of the cell overlaps the Quad, if so
/// Add that cell to this Quads list of cells to know about.
/// This will lead to duplicate data, it would be better to just keep cells in the
/// smallest box that will contain it completely, but for now I'm tired, and can't think.
/// </summary>
/// <returns><c>true</c>, if contains any point in cell was quaded, <c>false</c> otherwise.</returns>
/// <param name="c">C.</param>
public bool QuadContainsEveryPointInCell (Cell c)
{
if (!BoundingBox.Contains (c.site.AsVector2 ()))
return false;
foreach (VoronoiEdge edge in c.voronoiEdges) {
if (edge.VVertexA != Fortune.VVInfinite) {
if (!BoundingBox.Contains (edge.VVertexA.AsVector2 ()))
return false;
}
if (edge.VVertexB != Fortune.VVInfinite) {
if (!BoundingBox.Contains (edge.VVertexB.AsVector2 ()))
return false;
}
}
return true;
}
/// <summary>
/// Insert the specified Cell In the tree.
/// </summary>
/// <param name="c">C.</param>
public bool Insert (Cell c)
{
//Debug.Log ("Inserting Cell: " + c.site.AsVector2 () + " into Quad: " + ID + " at Depth: " + Depth + " Max Depth: " + MaxDepth);
// First make sure this cell is in bounds.
// It should always be, but just to be sure.
//if (!BoundingBox.Contains (c.site.AsVector2 ()))
if (!QuadContainsEveryPointInCell (c))
return false; // object could not be added.
Cells.Add (c);
// If we don't already have children
if (Children == null) { // AND we aren't too deep in the tree. . .
if ((Depth + 1) < MaxDepth) {
Split (); // Split to make room.
return true;
// } else { // If we ARE at Max Depth stick the cell at this level.
// Cells.Add (c);
// return true;
}
}
if (Children != null) {
// If we split this quad . . .
// Now Check if the point fits in a Child.
if (Children [0].Insert (c))
return true;
if (Children [1].Insert (c))
return true;
if (Children [2].Insert (c))
return true;
if (Children [3].Insert (c))
return true;
}
// For some reason this cell couldn't be inserted, this should never happen!
//Debug.Log ("Could Not Insert cell: " + c.site.AsVector2 ().ToString ());
return false;
}
private int NumberOfSites = 512; // Number of seed points to generate for the voronoi diagram, the higher the number the more tesselated the map will be.
private bool BuildGraph ()
{
Sites_World = GenerateRandom (Seed, NumberOfSites, 0, Max);
Profiler.BeginSample ("Fortune Compute VoronoiGraph");
Graph_World = Fortune.ComputeVoronoiGraph (Sites_World);
Profiler.EndSample ();
if (Relax) {
// Lloyd Relax the points here to get more even distribution.
// First we need to know the N number of Voronoi Verts that make up each cell.
// Then we can find the centroid of each of those Cells, and move the Site that created this cell to that centroid.
// Finally we replace our existing Voronoi graph with a new one made from these centered sites.
// This will be computationally expensive so we don't want to do it too many times, 2 max??
for (int i = 0; i < RelaxSteps; i++) {
Sites_World = LloydRelax (Sites_World, Graph_World);
Graph_World = Fortune.ComputeVoronoiGraph (Sites_World);
}
}
// now you have all the voronoi vertices in graph.Vertices and all the voronoi edges in Relsult.Edges
//Debug.Log ("Number of Sites: " + sites.Length);
//Debug.Log ("graph.Verts Length: " + graph.Vertizes.Count);
if (GenerateCells) {
Debug.Log ("Starting Generating Cells in the BuildGraph, Max is: " + Max);
//Convert Voronoi to Cells
for (int j =0; j < Sites_World.Length; j++) {
Vector v = Sites_World [j];
Cell c = new Cell (v);
c.max = Max;
c.border = false;
List<VoronoiEdge> currentBorders = new List<VoronoiEdge> ();
// Find Cell VoronoiEdges
foreach (VoronoiEdge edge in Graph_World.Edges) {
if (edge.LeftData == v || edge.RightData == v) {
if (edge.IsInfinite) {
c.IsBorder ();
Vector AdjustedVec = edge.FixedPoint;
edge.VVertexA = AdjustedVec;
edge.VVertexB = AdjustedVec + (edge.DirectionVector * InfinityLength);
} else if (edge.IsPartlyInfinite) {
c.IsBorder ();
Vector AdjustedVec = edge.FixedPoint;
if (edge.VVertexA == Fortune.VVInfinite) {
edge.VVertexA = AdjustedVec;
}
if (edge.VVertexB == Fortune.VVInfinite) {
edge.VVertexB = AdjustedVec;
}
}
BorderCellMax = Max - Border;
BorderCellMin = Border;
if (edge.VVertexA [0] < BorderCellMin || edge.VVertexA [0] > BorderCellMax || edge.VVertexA [1] < BorderCellMin || edge.VVertexA [1] > BorderCellMax ||
edge.VVertexB [0] < BorderCellMin || edge.VVertexB [0] > BorderCellMax || edge.VVertexB [1] < BorderCellMin || edge.VVertexB [1] > BorderCellMax) {
c.IsBorder ();
}
if (!currentBorders.Contains (edge)) {
currentBorders.Add (edge);
}
if (!c.neighborCells.Contains (edge.RightData)) {
c.neighborCells.Add (edge.RightData);
}
} else if (edge.RightData == v) {
if (!c.neighborCells.Contains (edge.LeftData)) {
c.neighborCells.Add (edge.LeftData);
}
}
}
c.voronoiEdges = currentBorders;
CellGraph.Add (v, c);
}
}
//TODO make exceptions to handle errors during graph creation.
if (CellGraph.Count > 0) {
return true;
} else {
return false;
}
}